shithub: libvpx

--- /dev/null

+++ b/vp9/decoder/vp9_decodeframe.c

@@ -1,0 +1,1384 @@

+/*

+ *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.

+ *

+ *  Use of this source code is governed by a BSD-style license

+ *  that can be found in the LICENSE file in the root of the source

+ *  tree. An additional intellectual property rights grant can be found

+ *  in the file PATENTS.  All contributing project authors may

+ *  be found in the AUTHORS file in the root of the source tree.

+ */

+#include <assert.h>

+#include "./vp9_rtcd.h"

+#include "vpx_mem/vpx_mem.h"

+#include "vpx_scale/vpx_scale.h"

+#include "vp9/common/vp9_alloccommon.h"

+#include "vp9/common/vp9_common.h"

+#include "vp9/common/vp9_entropy.h"

+#include "vp9/common/vp9_entropymode.h"

+#include "vp9/common/vp9_extend.h"

+#include "vp9/common/vp9_idct.h"

+#include "vp9/common/vp9_pred_common.h"

+#include "vp9/common/vp9_quant_common.h"

+#include "vp9/common/vp9_reconintra.h"

+#include "vp9/common/vp9_reconinter.h"

+#include "vp9/common/vp9_seg_common.h"

+#include "vp9/common/vp9_tile_common.h"

+#include "vp9/decoder/vp9_dboolhuff.h"

+#include "vp9/decoder/vp9_decodeframe.h"

+#include "vp9/decoder/vp9_detokenize.h"

+#include "vp9/decoder/vp9_decodemv.h"

+#include "vp9/decoder/vp9_dsubexp.h"

+#include "vp9/decoder/vp9_onyxd_int.h"

+#include "vp9/decoder/vp9_read_bit_buffer.h"

+#include "vp9/decoder/vp9_thread.h"

+#include "vp9/decoder/vp9_treereader.h"

+typedef struct TileWorkerData {

+  VP9_COMMON *cm;

+  vp9_reader bit_reader;

+  DECLARE_ALIGNED(16, MACROBLOCKD, xd);

+  DECLARE_ALIGNED(16, unsigned char, token_cache[1024]);

+  DECLARE_ALIGNED(16, int16_t,  qcoeff[MAX_MB_PLANE][64 * 64]);

+  DECLARE_ALIGNED(16, int16_t,  dqcoeff[MAX_MB_PLANE][64 * 64]);

+  DECLARE_ALIGNED(16, uint16_t, eobs[MAX_MB_PLANE][256]);

+} TileWorkerData;

+static int read_be32(const uint8_t *p) {

+  return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];

+}

+static int is_compound_prediction_allowed(const VP9_COMMON *cm) {

+  int i;

+  for (i = 1; i < ALLOWED_REFS_PER_FRAME; ++i)

+    if  (cm->ref_frame_sign_bias[i + 1] != cm->ref_frame_sign_bias[1])

+      return 1;

+  return 0;

+}

+static void setup_compound_prediction(VP9_COMMON *cm) {

+  if (cm->ref_frame_sign_bias[LAST_FRAME] ==

+          cm->ref_frame_sign_bias[GOLDEN_FRAME]) {

+    cm->comp_fixed_ref = ALTREF_FRAME;

+    cm->comp_var_ref[0] = LAST_FRAME;

+    cm->comp_var_ref[1] = GOLDEN_FRAME;

+  } else if (cm->ref_frame_sign_bias[LAST_FRAME] ==

+                 cm->ref_frame_sign_bias[ALTREF_FRAME]) {

+    cm->comp_fixed_ref = GOLDEN_FRAME;

+    cm->comp_var_ref[0] = LAST_FRAME;

+    cm->comp_var_ref[1] = ALTREF_FRAME;

+  } else {

+    cm->comp_fixed_ref = LAST_FRAME;

+    cm->comp_var_ref[0] = GOLDEN_FRAME;

+    cm->comp_var_ref[1] = ALTREF_FRAME;

+  }

+}

+// len == 0 is not allowed

+static int read_is_valid(const uint8_t *start, size_t len, const uint8_t *end) {

+  return start + len > start && start + len <= end;

+}

+static int decode_unsigned_max(struct vp9_read_bit_buffer *rb, int max) {

+  const int data = vp9_rb_read_literal(rb, get_unsigned_bits(max));

+  return data > max ? max : data;

+}

+static TX_MODE read_tx_mode(vp9_reader *r) {

+  TX_MODE tx_mode = vp9_read_literal(r, 2);

+  if (tx_mode == ALLOW_32X32)

+    tx_mode += vp9_read_bit(r);

+  return tx_mode;

+}

+static void read_tx_probs(struct tx_probs *tx_probs, vp9_reader *r) {

+  int i, j;

+  for (i = 0; i < TX_SIZE_CONTEXTS; ++i)

+    for (j = 0; j < TX_SIZES - 3; ++j)

+      vp9_diff_update_prob(r, &tx_probs->p8x8[i][j]);

+  for (i = 0; i < TX_SIZE_CONTEXTS; ++i)

+    for (j = 0; j < TX_SIZES - 2; ++j)

+      vp9_diff_update_prob(r, &tx_probs->p16x16[i][j]);

+  for (i = 0; i < TX_SIZE_CONTEXTS; ++i)

+    for (j = 0; j < TX_SIZES - 1; ++j)

+      vp9_diff_update_prob(r, &tx_probs->p32x32[i][j]);

+}

+static void read_switchable_interp_probs(FRAME_CONTEXT *fc, vp9_reader *r) {

+  int i, j;

+  for (j = 0; j < SWITCHABLE_FILTER_CONTEXTS; ++j)

+    for (i = 0; i < SWITCHABLE_FILTERS - 1; ++i)

+      vp9_diff_update_prob(r, &fc->switchable_interp_prob[j][i]);

+}

+static void read_inter_mode_probs(FRAME_CONTEXT *fc, vp9_reader *r) {

+  int i, j;

+  for (i = 0; i < INTER_MODE_CONTEXTS; ++i)

+    for (j = 0; j < INTER_MODES - 1; ++j)

+      vp9_diff_update_prob(r, &fc->inter_mode_probs[i][j]);

+}

+static INLINE COMPPREDMODE_TYPE read_comp_pred_mode(vp9_reader *r) {

+  COMPPREDMODE_TYPE mode = vp9_read_bit(r);

+  if (mode)

+    mode += vp9_read_bit(r);

+  return mode;

+}

+static void read_comp_pred(VP9_COMMON *cm, vp9_reader *r) {

+  int i;

+  const int compound_allowed = is_compound_prediction_allowed(cm);

+  cm->comp_pred_mode = compound_allowed ? read_comp_pred_mode(r)

+                                        : SINGLE_PREDICTION_ONLY;

+  if (compound_allowed)

+    setup_compound_prediction(cm);

+  if (cm->comp_pred_mode == HYBRID_PREDICTION)

+    for (i = 0; i < COMP_INTER_CONTEXTS; i++)

+      vp9_diff_update_prob(r, &cm->fc.comp_inter_prob[i]);

+  if (cm->comp_pred_mode != COMP_PREDICTION_ONLY)

+    for (i = 0; i < REF_CONTEXTS; i++) {

+      vp9_diff_update_prob(r, &cm->fc.single_ref_prob[i][0]);

+      vp9_diff_update_prob(r, &cm->fc.single_ref_prob[i][1]);

+    }

+  if (cm->comp_pred_mode != SINGLE_PREDICTION_ONLY)

+    for (i = 0; i < REF_CONTEXTS; i++)

+      vp9_diff_update_prob(r, &cm->fc.comp_ref_prob[i]);

+}

+static void update_mv_probs(vp9_prob *p, int n, vp9_reader *r) {

+  int i;

+  for (i = 0; i < n; ++i)

+    if (vp9_read(r, NMV_UPDATE_PROB))

+       p[i] = (vp9_read_literal(r, 7) << 1) | 1;

+}

+static void read_mv_probs(nmv_context *ctx, int allow_hp, vp9_reader *r) {

+  int i, j;

+  update_mv_probs(ctx->joints, MV_JOINTS - 1, r);

+  for (i = 0; i < 2; ++i) {

+    nmv_component *const comp_ctx = &ctx->comps[i];

+    update_mv_probs(&comp_ctx->sign, 1, r);

+    update_mv_probs(comp_ctx->classes, MV_CLASSES - 1, r);

+    update_mv_probs(comp_ctx->class0, CLASS0_SIZE - 1, r);

+    update_mv_probs(comp_ctx->bits, MV_OFFSET_BITS, r);

+  }

+  for (i = 0; i < 2; ++i) {

+    nmv_component *const comp_ctx = &ctx->comps[i];

+    for (j = 0; j < CLASS0_SIZE; ++j)

+      update_mv_probs(comp_ctx->class0_fp[j], 3, r);

+    update_mv_probs(comp_ctx->fp, 3, r);

+  }

+  if (allow_hp) {

+    for (i = 0; i < 2; ++i) {

+      nmv_component *const comp_ctx = &ctx->comps[i];

+      update_mv_probs(&comp_ctx->class0_hp, 1, r);

+      update_mv_probs(&comp_ctx->hp, 1, r);

+    }

+  }

+}

+static void setup_plane_dequants(VP9_COMMON *cm, MACROBLOCKD *xd, int q_index) {

+  int i;

+  xd->plane[0].dequant = cm->y_dequant[q_index];

+  for (i = 1; i < MAX_MB_PLANE; i++)

+    xd->plane[i].dequant = cm->uv_dequant[q_index];

+}

+// Allocate storage for each tile column.

+// TODO(jzern): when max_threads <= 1 the same storage could be used for each

+// tile.

+static void alloc_tile_storage(VP9D_COMP *pbi, int tile_rows, int tile_cols) {

+  VP9_COMMON *const cm = &pbi->common;

+  const int aligned_mi_cols = mi_cols_aligned_to_sb(cm->mi_cols);

+  int i, tile_row, tile_col;

+  CHECK_MEM_ERROR(cm, pbi->mi_streams,

+                  vpx_realloc(pbi->mi_streams, tile_rows * tile_cols *

+                              sizeof(*pbi->mi_streams)));

+  for (tile_row = 0; tile_row < tile_rows; ++tile_row) {

+    for (tile_col = 0; tile_col < tile_cols; ++tile_col) {

+      TileInfo tile;

+      vp9_tile_init(&tile, cm, tile_row, tile_col);

+      pbi->mi_streams[tile_row * tile_cols + tile_col] =

+          &cm->mi[tile.mi_row_start * cm->mode_info_stride

+                  + tile.mi_col_start];

+    }

+  }

+  // 2 contexts per 'mi unit', so that we have one context per 4x4 txfm

+  // block where mi unit size is 8x8.

+  CHECK_MEM_ERROR(cm, pbi->above_context[0],

+                  vpx_realloc(pbi->above_context[0],

+                              sizeof(*pbi->above_context[0]) * MAX_MB_PLANE *

+                              2 * aligned_mi_cols));

+  for (i = 1; i < MAX_MB_PLANE; ++i) {

+    pbi->above_context[i] = pbi->above_context[0] +

+                            i * sizeof(*pbi->above_context[0]) *

+                            2 * aligned_mi_cols;

+  }

+  // This is sized based on the entire frame. Each tile operates within its

+  // column bounds.

+  CHECK_MEM_ERROR(cm, pbi->above_seg_context,

+                  vpx_realloc(pbi->above_seg_context,

+                              sizeof(*pbi->above_seg_context) *

+                              aligned_mi_cols));

+}

+static void inverse_transform_block(MACROBLOCKD* xd, int plane, int block,

+                                    TX_SIZE tx_size, int x, int y) {

+  struct macroblockd_plane *const pd = &xd->plane[plane];

+  const int eob = pd->eobs[block];

+  if (eob > 0) {

+    TX_TYPE tx_type;

+    const int plane_type = pd->plane_type;

+    const int stride = pd->dst.stride;

+    int16_t *const dqcoeff = BLOCK_OFFSET(pd->dqcoeff, block);

+    uint8_t *const dst = &pd->dst.buf[4 * y * stride + 4 * x];

+    switch (tx_size) {

+      case TX_4X4:

+        tx_type = get_tx_type_4x4(plane_type, xd, block);

+        if (tx_type == DCT_DCT)

+          xd->itxm_add(dqcoeff, dst, stride, eob);

+        else

+          vp9_iht4x4_16_add(dqcoeff, dst, stride, tx_type);

+        break;

+      case TX_8X8:

+        tx_type = get_tx_type_8x8(plane_type, xd);

+        vp9_iht8x8_add(tx_type, dqcoeff, dst, stride, eob);

+        break;

+      case TX_16X16:

+        tx_type = get_tx_type_16x16(plane_type, xd);

+        vp9_iht16x16_add(tx_type, dqcoeff, dst, stride, eob);

+        break;

+      case TX_32X32:

+        tx_type = DCT_DCT;

+        vp9_idct32x32_add(dqcoeff, dst, stride, eob);

+        break;

+      default:

+        assert(!"Invalid transform size");

+    }

+    if (eob == 1) {

+      vpx_memset(dqcoeff, 0, 2 * sizeof(dqcoeff[0]));

+    } else {

+      if (tx_type == DCT_DCT && tx_size <= TX_16X16 && eob <= 10)

+        vpx_memset(dqcoeff, 0, 4 * (4 << tx_size) * sizeof(dqcoeff[0]));

+      else if (tx_size == TX_32X32 && eob <= 34)

+        vpx_memset(dqcoeff, 0, 256 * sizeof(dqcoeff[0]));

+      else

+        vpx_memset(dqcoeff, 0, (16 << (tx_size << 1)) * sizeof(dqcoeff[0]));

+    }

+  }

+}

+struct intra_args {

+  VP9_COMMON *cm;

+  MACROBLOCKD *xd;

+  vp9_reader *r;

+  uint8_t *token_cache;

+};

+static void predict_and_reconstruct_intra_block(int plane, int block,

+                                                BLOCK_SIZE plane_bsize,

+                                                TX_SIZE tx_size, void *arg) {

+  struct intra_args *const args = arg;

+  VP9_COMMON *const cm = args->cm;

+  MACROBLOCKD *const xd = args->xd;

+  struct macroblockd_plane *const pd = &xd->plane[plane];

+  MODE_INFO *const mi = xd->mi_8x8[0];

+  const MB_PREDICTION_MODE mode = (plane == 0)

+          ? ((mi->mbmi.sb_type < BLOCK_8X8) ? mi->bmi[block].as_mode

+                                            : mi->mbmi.mode)

+          : mi->mbmi.uv_mode;

+  int x, y;

+  uint8_t *dst;

+  txfrm_block_to_raster_xy(plane_bsize, tx_size, block, &x, &y);

+  dst = &pd->dst.buf[4 * y * pd->dst.stride + 4 * x];

+  if (xd->mb_to_right_edge < 0 || xd->mb_to_bottom_edge < 0)

+    extend_for_intra(xd, plane_bsize, plane, block, tx_size);

+  vp9_predict_intra_block(xd, block >> (tx_size << 1),

+                          b_width_log2(plane_bsize), tx_size, mode,

+                          dst, pd->dst.stride, dst, pd->dst.stride);

+  if (!mi->mbmi.skip_coeff) {

+    vp9_decode_block_tokens(cm, xd, plane, block, plane_bsize, x, y, tx_size,

+                            args->r, args->token_cache);

+    inverse_transform_block(xd, plane, block, tx_size, x, y);

+  }

+}

+struct inter_args {

+  VP9_COMMON *cm;

+  MACROBLOCKD *xd;

+  vp9_reader *r;

+  int *eobtotal;

+  uint8_t *token_cache;

+};

+static void reconstruct_inter_block(int plane, int block,

+                                    BLOCK_SIZE plane_bsize,

+                                    TX_SIZE tx_size, void *arg) {

+  struct inter_args *args = arg;

+  VP9_COMMON *const cm = args->cm;

+  MACROBLOCKD *const xd = args->xd;

+  int x, y;

+  txfrm_block_to_raster_xy(plane_bsize, tx_size, block, &x, &y);

+  *args->eobtotal += vp9_decode_block_tokens(cm, xd, plane, block,

+                                             plane_bsize, x, y, tx_size,

+                                             args->r, args->token_cache);

+  inverse_transform_block(xd, plane, block, tx_size, x, y);

+}

+static void set_offsets(VP9_COMMON *const cm, MACROBLOCKD *const xd,

+                        const TileInfo *const tile,

+                        BLOCK_SIZE bsize, int mi_row, int mi_col) {

+  const int bh = num_8x8_blocks_high_lookup[bsize];

+  const int bw = num_8x8_blocks_wide_lookup[bsize];

+  const int offset = mi_row * cm->mode_info_stride + mi_col;

+  const int tile_offset = tile->mi_row_start * cm->mode_info_stride +

+                          tile->mi_col_start;

+  xd->mi_8x8 = cm->mi_grid_visible + offset;

+  xd->prev_mi_8x8 = cm->prev_mi_grid_visible + offset;

+  // we are using the mode info context stream here

+  xd->mi_8x8[0] = xd->mi_stream + offset - tile_offset;

+  xd->mi_8x8[0]->mbmi.sb_type = bsize;

+  // Special case: if prev_mi is NULL, the previous mode info context

+  // cannot be used.

+  xd->last_mi = cm->prev_mi ? xd->prev_mi_8x8[0] : NULL;

+  set_skip_context(xd, xd->above_context, xd->left_context, mi_row, mi_col);

+  // Distance of Mb to the various image edges. These are specified to 8th pel

+  // as they are always compared to values that are in 1/8th pel units

+  set_mi_row_col(xd, tile, mi_row, bh, mi_col, bw, cm->mi_rows, cm->mi_cols);

+  setup_dst_planes(xd, get_frame_new_buffer(cm), mi_row, mi_col);

+}

+static void set_ref(VP9_COMMON *const cm, MACROBLOCKD *const xd,

+                    int idx, int mi_row, int mi_col) {

+  MB_MODE_INFO *const mbmi = &xd->mi_8x8[0]->mbmi;

+  const int ref = mbmi->ref_frame[idx] - LAST_FRAME;

+  const YV12_BUFFER_CONFIG *cfg = get_frame_ref_buffer(cm, ref);

+  const struct scale_factors_common *sfc = &cm->active_ref_scale_comm[ref];

+  if (!vp9_is_valid_scale(sfc))

+    vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,

+                       "Invalid scale factors");

+  xd->scale_factor[idx].sfc = sfc;

+  setup_pre_planes(xd, idx, cfg, mi_row, mi_col, &xd->scale_factor[idx]);

+  xd->corrupted |= cfg->corrupted;

+}

+static void decode_modes_b(VP9_COMMON *const cm, MACROBLOCKD *const xd,

+                           const TileInfo *const tile,

+                           int mi_row, int mi_col,

+                           vp9_reader *r, BLOCK_SIZE bsize,

+                           uint8_t *token_cache) {

+  const int less8x8 = bsize < BLOCK_8X8;

+  MB_MODE_INFO *mbmi;

+  set_offsets(cm, xd, tile, bsize, mi_row, mi_col);

+  vp9_read_mode_info(cm, xd, tile, mi_row, mi_col, r);

+  if (less8x8)

+    bsize = BLOCK_8X8;

+  // Has to be called after set_offsets

+  mbmi = &xd->mi_8x8[0]->mbmi;

+  if (mbmi->skip_coeff) {

+    reset_skip_context(xd, bsize);

+  } else {

+    if (cm->seg.enabled)

+      setup_plane_dequants(cm, xd, vp9_get_qindex(&cm->seg, mbmi->segment_id,

+                                                  cm->base_qindex));

+  }

+  if (!is_inter_block(mbmi)) {

+    struct intra_args arg = {

+      cm, xd, r, token_cache

+    };

+    foreach_transformed_block(xd, bsize, predict_and_reconstruct_intra_block,

+                              &arg);

+  } else {

+    // Setup

+    set_ref(cm, xd, 0, mi_row, mi_col);

+    if (has_second_ref(mbmi))

+      set_ref(cm, xd, 1, mi_row, mi_col);

+    xd->subpix.filter_x = xd->subpix.filter_y =

+        vp9_get_filter_kernel(mbmi->interp_filter);

+    // Prediction

+    vp9_build_inter_predictors_sb(xd, mi_row, mi_col, bsize);

+    // Reconstruction

+    if (!mbmi->skip_coeff) {

+      int eobtotal = 0;

+      struct inter_args arg = {

+        cm, xd, r, &eobtotal, token_cache

+      };

+      foreach_transformed_block(xd, bsize, reconstruct_inter_block, &arg);

+      if (!less8x8 && eobtotal == 0)

+        mbmi->skip_coeff = 1;  // skip loopfilter

+    }

+  }

+  xd->corrupted |= vp9_reader_has_error(r);

+}

+static PARTITION_TYPE read_partition(VP9_COMMON *cm, MACROBLOCKD *xd, int hbs,

+                                     int mi_row, int mi_col, BLOCK_SIZE bsize,

+                                     vp9_reader *r) {

+  const int ctx = partition_plane_context(xd->above_seg_context,

+                                          xd->left_seg_context,

+                                          mi_row, mi_col, bsize);

+  const vp9_prob *const probs = get_partition_probs(cm, ctx);

+  const int has_rows = (mi_row + hbs) < cm->mi_rows;

+  const int has_cols = (mi_col + hbs) < cm->mi_cols;

+  PARTITION_TYPE p;

+  if (has_rows && has_cols)

+    p = treed_read(r, vp9_partition_tree, probs);

+  else if (!has_rows && has_cols)

+    p = vp9_read(r, probs[1]) ? PARTITION_SPLIT : PARTITION_HORZ;

+  else if (has_rows && !has_cols)

+    p = vp9_read(r, probs[2]) ? PARTITION_SPLIT : PARTITION_VERT;

+  else

+    p = PARTITION_SPLIT;

+  if (!cm->frame_parallel_decoding_mode)

+    ++cm->counts.partition[ctx][p];

+  return p;

+}

+static void decode_modes_sb(VP9_COMMON *const cm, MACROBLOCKD *const xd,

+                            const TileInfo *const tile,

+                            int mi_row, int mi_col,

+                            vp9_reader* r, BLOCK_SIZE bsize,

+                            uint8_t *token_cache) {

+  const int hbs = num_8x8_blocks_wide_lookup[bsize] / 2;

+  PARTITION_TYPE partition;

+  BLOCK_SIZE subsize;

+  if (mi_row >= cm->mi_rows || mi_col >= cm->mi_cols)

+    return;

+  partition = read_partition(cm, xd, hbs, mi_row, mi_col, bsize, r);

+  subsize = get_subsize(bsize, partition);

+  if (subsize < BLOCK_8X8) {

+    decode_modes_b(cm, xd, tile, mi_row, mi_col, r, subsize, token_cache);

+  } else {

+    switch (partition) {

+      case PARTITION_NONE:

+        decode_modes_b(cm, xd, tile, mi_row, mi_col, r, subsize, token_cache);

+        break;

+      case PARTITION_HORZ:

+        decode_modes_b(cm, xd, tile, mi_row, mi_col, r, subsize, token_cache);

+        if (mi_row + hbs < cm->mi_rows)

+          decode_modes_b(cm, xd, tile, mi_row + hbs, mi_col, r, subsize,

+                         token_cache);

+        break;

+      case PARTITION_VERT:

+        decode_modes_b(cm, xd, tile, mi_row, mi_col, r, subsize, token_cache);

+        if (mi_col + hbs < cm->mi_cols)

+          decode_modes_b(cm, xd, tile, mi_row, mi_col + hbs, r, subsize,

+                         token_cache);

+        break;

+      case PARTITION_SPLIT:

+        decode_modes_sb(cm, xd, tile, mi_row, mi_col, r, subsize,

+                        token_cache);

+        decode_modes_sb(cm, xd, tile, mi_row, mi_col + hbs, r, subsize,

+                        token_cache);

+        decode_modes_sb(cm, xd, tile, mi_row + hbs, mi_col, r, subsize,

+                        token_cache);

+        decode_modes_sb(cm, xd, tile, mi_row + hbs, mi_col + hbs, r, subsize,

+                        token_cache);

+        break;

+      default:

+        assert(!"Invalid partition type");

+    }

+  }

+  // update partition context

+  if (bsize >= BLOCK_8X8 &&

+      (bsize == BLOCK_8X8 || partition != PARTITION_SPLIT))

+    update_partition_context(xd->above_seg_context, xd->left_seg_context,

+                             mi_row, mi_col, subsize, bsize);

+}

+static void setup_token_decoder(const uint8_t *data,

+                                const uint8_t *data_end,

+                                size_t read_size,

+                                struct vpx_internal_error_info *error_info,

+                                vp9_reader *r) {

+  // Validate the calculated partition length. If the buffer

+  // described by the partition can't be fully read, then restrict

+  // it to the portion that can be (for EC mode) or throw an error.

+  if (!read_is_valid(data, read_size, data_end))

+    vpx_internal_error(error_info, VPX_CODEC_CORRUPT_FRAME,

+                       "Truncated packet or corrupt tile length");

+  if (vp9_reader_init(r, data, read_size))

+    vpx_internal_error(error_info, VPX_CODEC_MEM_ERROR,

+                       "Failed to allocate bool decoder %d", 1);

+}

+static void read_coef_probs_common(vp9_coeff_probs_model *coef_probs,

+                                   vp9_reader *r) {

+  int i, j, k, l, m;

+  if (vp9_read_bit(r))

+    for (i = 0; i < BLOCK_TYPES; i++)

+      for (j = 0; j < REF_TYPES; j++)

+        for (k = 0; k < COEF_BANDS; k++)

+          for (l = 0; l < PREV_COEF_CONTEXTS; l++)

+            if (k > 0 || l < 3)

+              for (m = 0; m < UNCONSTRAINED_NODES; m++)

+                vp9_diff_update_prob(r, &coef_probs[i][j][k][l][m]);

+}

+static void read_coef_probs(FRAME_CONTEXT *fc, TX_MODE tx_mode,

+                            vp9_reader *r) {

+    const TX_SIZE max_tx_size = tx_mode_to_biggest_tx_size[tx_mode];

+    TX_SIZE tx_size;

+    for (tx_size = TX_4X4; tx_size <= max_tx_size; ++tx_size)

+      read_coef_probs_common(fc->coef_probs[tx_size], r);

+}

+static void setup_segmentation(struct segmentation *seg,

+                               struct vp9_read_bit_buffer *rb) {

+  int i, j;

+  seg->update_map = 0;

+  seg->update_data = 0;

+  seg->enabled = vp9_rb_read_bit(rb);

+  if (!seg->enabled)

+    return;

+  // Segmentation map update

+  seg->update_map = vp9_rb_read_bit(rb);

+  if (seg->update_map) {

+    for (i = 0; i < SEG_TREE_PROBS; i++)

+      seg->tree_probs[i] = vp9_rb_read_bit(rb) ? vp9_rb_read_literal(rb, 8)

+                                               : MAX_PROB;

+    seg->temporal_update = vp9_rb_read_bit(rb);

+    if (seg->temporal_update) {

+      for (i = 0; i < PREDICTION_PROBS; i++)

+        seg->pred_probs[i] = vp9_rb_read_bit(rb) ? vp9_rb_read_literal(rb, 8)

+                                                 : MAX_PROB;

+    } else {

+      for (i = 0; i < PREDICTION_PROBS; i++)

+        seg->pred_probs[i] = MAX_PROB;

+    }

+  }

+  // Segmentation data update

+  seg->update_data = vp9_rb_read_bit(rb);

+  if (seg->update_data) {

+    seg->abs_delta = vp9_rb_read_bit(rb);

+    vp9_clearall_segfeatures(seg);

+    for (i = 0; i < MAX_SEGMENTS; i++) {

+      for (j = 0; j < SEG_LVL_MAX; j++) {

+        int data = 0;

+        const int feature_enabled = vp9_rb_read_bit(rb);

+        if (feature_enabled) {

+          vp9_enable_segfeature(seg, i, j);

+          data = decode_unsigned_max(rb, vp9_seg_feature_data_max(j));

+          if (vp9_is_segfeature_signed(j))

+            data = vp9_rb_read_bit(rb) ? -data : data;

+        }

+        vp9_set_segdata(seg, i, j, data);

+      }

+    }

+  }

+}

+static void setup_loopfilter(struct loopfilter *lf,

+                             struct vp9_read_bit_buffer *rb) {

+  lf->filter_level = vp9_rb_read_literal(rb, 6);

+  lf->sharpness_level = vp9_rb_read_literal(rb, 3);

+  // Read in loop filter deltas applied at the MB level based on mode or ref

+  // frame.

+  lf->mode_ref_delta_update = 0;

+  lf->mode_ref_delta_enabled = vp9_rb_read_bit(rb);

+  if (lf->mode_ref_delta_enabled) {

+    lf->mode_ref_delta_update = vp9_rb_read_bit(rb);

+    if (lf->mode_ref_delta_update) {

+      int i;

+      for (i = 0; i < MAX_REF_LF_DELTAS; i++)

+        if (vp9_rb_read_bit(rb))

+          lf->ref_deltas[i] = vp9_rb_read_signed_literal(rb, 6);

+      for (i = 0; i < MAX_MODE_LF_DELTAS; i++)

+        if (vp9_rb_read_bit(rb))

+          lf->mode_deltas[i] = vp9_rb_read_signed_literal(rb, 6);

+    }

+  }

+}

+static int read_delta_q(struct vp9_read_bit_buffer *rb, int *delta_q) {

+  const int old = *delta_q;

+  *delta_q = vp9_rb_read_bit(rb) ? vp9_rb_read_signed_literal(rb, 4) : 0;

+  return old != *delta_q;

+}

+static void setup_quantization(VP9_COMMON *const cm, MACROBLOCKD *const xd,

+                               struct vp9_read_bit_buffer *rb) {

+  int update = 0;

+  cm->base_qindex = vp9_rb_read_literal(rb, QINDEX_BITS);

+  update |= read_delta_q(rb, &cm->y_dc_delta_q);

+  update |= read_delta_q(rb, &cm->uv_dc_delta_q);

+  update |= read_delta_q(rb, &cm->uv_ac_delta_q);

+  if (update)

+    vp9_init_dequantizer(cm);

+  xd->lossless = cm->base_qindex == 0 &&

+                 cm->y_dc_delta_q == 0 &&

+                 cm->uv_dc_delta_q == 0 &&

+                 cm->uv_ac_delta_q == 0;

+  xd->itxm_add = xd->lossless ? vp9_iwht4x4_add : vp9_idct4x4_add;

+}

+static INTERPOLATION_TYPE read_interp_filter_type(

+                              struct vp9_read_bit_buffer *rb) {

+  const INTERPOLATION_TYPE literal_to_type[] = { EIGHTTAP_SMOOTH,

+                                                 EIGHTTAP,

+                                                 EIGHTTAP_SHARP,

+                                                 BILINEAR };

+  return vp9_rb_read_bit(rb) ? SWITCHABLE

+                             : literal_to_type[vp9_rb_read_literal(rb, 2)];

+}

+static void read_frame_size(struct vp9_read_bit_buffer *rb,

+                            int *width, int *height) {

+  const int w = vp9_rb_read_literal(rb, 16) + 1;

+  const int h = vp9_rb_read_literal(rb, 16) + 1;

+  *width = w;

+  *height = h;

+}

+static void setup_display_size(VP9_COMMON *cm, struct vp9_read_bit_buffer *rb) {

+  cm->display_width = cm->width;

+  cm->display_height = cm->height;

+  if (vp9_rb_read_bit(rb))

+    read_frame_size(rb, &cm->display_width, &cm->display_height);

+}

+static void apply_frame_size(VP9D_COMP *pbi, int width, int height) {

+  VP9_COMMON *cm = &pbi->common;

+  if (cm->width != width || cm->height != height) {

+    // Change in frame size.

+    if (cm->width == 0 || cm->height == 0) {

+      // Assign new frame buffer on first call.

+      cm->new_fb_idx = NUM_YV12_BUFFERS - 1;

+      cm->fb_idx_ref_cnt[cm->new_fb_idx] = 1;

+    }

+    // TODO(agrange) Don't test width/height, check overall size.

+    if (width > cm->width || height > cm->height) {

+      // Rescale frame buffers only if they're not big enough already.

+      if (vp9_resize_frame_buffers(cm, width, height))

+        vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR,

+                           "Failed to allocate frame buffers");

+    }

+    cm->width = width;

+    cm->height = height;

+    vp9_update_frame_size(cm);

+  }

+  vp9_realloc_frame_buffer(get_frame_new_buffer(cm), cm->width, cm->height,

+                           cm->subsampling_x, cm->subsampling_y,

+                           VP9BORDERINPIXELS);

+}

+static void setup_frame_size(VP9D_COMP *pbi,

+                             struct vp9_read_bit_buffer *rb) {

+  int width, height;

+  read_frame_size(rb, &width, &height);

+  apply_frame_size(pbi, width, height);

+  setup_display_size(&pbi->common, rb);

+}

+static void setup_frame_size_with_refs(VP9D_COMP *pbi,

+                                       struct vp9_read_bit_buffer *rb) {

+  VP9_COMMON *const cm = &pbi->common;

+  int width, height;

+  int found = 0, i;

+  for (i = 0; i < ALLOWED_REFS_PER_FRAME; ++i) {

+    if (vp9_rb_read_bit(rb)) {

+      YV12_BUFFER_CONFIG *const cfg = get_frame_ref_buffer(cm, i);

+      width = cfg->y_crop_width;

+      height = cfg->y_crop_height;

+      found = 1;

+      break;

+    }

+  }

+  if (!found)

+    read_frame_size(rb, &width, &height);

+  if (!width || !height)

+    vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,

+                       "Referenced frame with invalid size");

+  apply_frame_size(pbi, width, height);

+  setup_display_size(cm, rb);

+}

+static void setup_tile_context(VP9D_COMP *const pbi, MACROBLOCKD *const xd,

+                               int tile_row, int tile_col) {

+  int i;

+  const int tile_cols = 1 << pbi->common.log2_tile_cols;

+  xd->mi_stream = pbi->mi_streams[tile_row * tile_cols + tile_col];

+  for (i = 0; i < MAX_MB_PLANE; ++i) {

+    xd->above_context[i] = pbi->above_context[i];

+  }

+  // see note in alloc_tile_storage().

+  xd->above_seg_context = pbi->above_seg_context;

+}

+static void decode_tile(VP9D_COMP *pbi, const TileInfo *const tile,

+                        vp9_reader *r) {

+  const int num_threads = pbi->oxcf.max_threads;

+  VP9_COMMON *const cm = &pbi->common;

+  int mi_row, mi_col;

+  MACROBLOCKD *xd = &pbi->mb;

+  if (pbi->do_loopfilter_inline) {

+    LFWorkerData *const lf_data = (LFWorkerData*)pbi->lf_worker.data1;

+    lf_data->frame_buffer = get_frame_new_buffer(cm);

+    lf_data->cm = cm;

+    lf_data->xd = pbi->mb;

+    lf_data->stop = 0;

+    lf_data->y_only = 0;

+    vp9_loop_filter_frame_init(cm, cm->lf.filter_level);

+  }

+  for (mi_row = tile->mi_row_start; mi_row < tile->mi_row_end;

+       mi_row += MI_BLOCK_SIZE) {

+    // For a SB there are 2 left contexts, each pertaining to a MB row within

+    vp9_zero(xd->left_context);

+    vp9_zero(xd->left_seg_context);

+    for (mi_col = tile->mi_col_start; mi_col < tile->mi_col_end;

+         mi_col += MI_BLOCK_SIZE) {

+      decode_modes_sb(cm, xd, tile, mi_row, mi_col, r, BLOCK_64X64,

+                      pbi->token_cache);

+    }

+    if (pbi->do_loopfilter_inline) {

+      const int lf_start = mi_row - MI_BLOCK_SIZE;

+      LFWorkerData *const lf_data = (LFWorkerData*)pbi->lf_worker.data1;

+      // delay the loopfilter by 1 macroblock row.

+      if (lf_start < 0) continue;

+      // decoding has completed: finish up the loop filter in this thread.

+      if (mi_row + MI_BLOCK_SIZE >= tile->mi_row_end) continue;

+      vp9_worker_sync(&pbi->lf_worker);

+      lf_data->start = lf_start;

+      lf_data->stop = mi_row;

+      if (num_threads > 1) {

+        vp9_worker_launch(&pbi->lf_worker);

+      } else {

+        vp9_worker_execute(&pbi->lf_worker);

+      }

+    }

+  }

+  if (pbi->do_loopfilter_inline) {

+    LFWorkerData *const lf_data = (LFWorkerData*)pbi->lf_worker.data1;

+    vp9_worker_sync(&pbi->lf_worker);

+    lf_data->start = lf_data->stop;

+    lf_data->stop = cm->mi_rows;

+    vp9_worker_execute(&pbi->lf_worker);

+  }

+}

+static void setup_tile_info(VP9_COMMON *cm, struct vp9_read_bit_buffer *rb) {

+  int min_log2_tile_cols, max_log2_tile_cols, max_ones;

+  vp9_get_tile_n_bits(cm->mi_cols, &min_log2_tile_cols, &max_log2_tile_cols);

+  // columns

+  max_ones = max_log2_tile_cols - min_log2_tile_cols;

+  cm->log2_tile_cols = min_log2_tile_cols;

+  while (max_ones-- && vp9_rb_read_bit(rb))

+    cm->log2_tile_cols++;

+  // rows

+  cm->log2_tile_rows = vp9_rb_read_bit(rb);

+  if (cm->log2_tile_rows)

+    cm->log2_tile_rows += vp9_rb_read_bit(rb);

+}

+// Reads the next tile returning its size and adjusting '*data' accordingly

+// based on 'is_last'.

+static size_t get_tile(const uint8_t *const data_end,

+                       int is_last,

+                       struct vpx_internal_error_info *error_info,

+                       const uint8_t **data) {

+  size_t size;

+  if (!is_last) {

+    if (!read_is_valid(*data, 4, data_end))

+      vpx_internal_error(error_info, VPX_CODEC_CORRUPT_FRAME,

+          "Truncated packet or corrupt tile length");

+    size = read_be32(*data);

+    *data += 4;

+  } else {

+    size = data_end - *data;

+  }

+  return size;

+}

+typedef struct TileBuffer {

+  const uint8_t *data;

+  size_t size;

+} TileBuffer;

+static const uint8_t *decode_tiles(VP9D_COMP *pbi, const uint8_t *data) {

+  VP9_COMMON *const cm = &pbi->common;

+  MACROBLOCKD *const xd = &pbi->mb;

+  const int aligned_cols = mi_cols_aligned_to_sb(cm->mi_cols);

+  const int tile_cols = 1 << cm->log2_tile_cols;

+  const int tile_rows = 1 << cm->log2_tile_rows;

+  TileBuffer tile_buffers[4][1 << 6];

+  int tile_row, tile_col;

+  const uint8_t *const data_end = pbi->source + pbi->source_sz;

+  const uint8_t *end = NULL;

+  vp9_reader r;

+  assert(tile_rows <= 4);

+  assert(tile_cols <= (1 << 6));

+  // Note: this memset assumes above_context[0], [1] and [2]

+  // are allocated as part of the same buffer.

+  vpx_memset(pbi->above_context[0], 0,

+             sizeof(*pbi->above_context[0]) * MAX_MB_PLANE * 2 * aligned_cols);

+  vpx_memset(pbi->above_seg_context, 0,

+             sizeof(*pbi->above_seg_context) * aligned_cols);

+  // Load tile data into tile_buffers

+  for (tile_row = 0; tile_row < tile_rows; ++tile_row) {

+    for (tile_col = 0; tile_col < tile_cols; ++tile_col) {

+      const int last_tile = tile_row == tile_rows - 1 &&

+                            tile_col == tile_cols - 1;

+      const size_t size = get_tile(data_end, last_tile, &cm->error, &data);

+      TileBuffer *const buf = &tile_buffers[tile_row][tile_col];

+      buf->data = data;

+      buf->size = size;

+      data += size;

+    }

+  }

+  // Decode tiles using data from tile_buffers

+  for (tile_row = 0; tile_row < tile_rows; ++tile_row) {

+    for (tile_col = 0; tile_col < tile_cols; ++tile_col) {

+      const int col = pbi->oxcf.inv_tile_order ? tile_cols - tile_col - 1

+                                               : tile_col;

+      const int last_tile = tile_row == tile_rows - 1 &&

+                                 col == tile_cols - 1;

+      const TileBuffer *const buf = &tile_buffers[tile_row][col];

+      TileInfo tile;

+      vp9_tile_init(&tile, cm, tile_row, col);

+      setup_token_decoder(buf->data, data_end, buf->size, &cm->error, &r);

+      setup_tile_context(pbi, xd, tile_row, col);

+      decode_tile(pbi, &tile, &r);

+      if (last_tile)

+        end = vp9_reader_find_end(&r);

+    }

+  }

+  return end;

+}

+static void setup_tile_macroblockd(TileWorkerData *const tile_data) {

+  MACROBLOCKD *xd = &tile_data->xd;

+  struct macroblockd_plane *const pd = xd->plane;

+  int i;

+  for (i = 0; i < MAX_MB_PLANE; ++i) {

+    pd[i].qcoeff  = tile_data->qcoeff[i];

+    pd[i].dqcoeff = tile_data->dqcoeff[i];

+    pd[i].eobs    = tile_data->eobs[i];

+    vpx_memset(xd->plane[i].dqcoeff, 0, 64 * 64 * sizeof(int16_t));

+  }

+}

+static int tile_worker_hook(void *arg1, void *arg2) {

+  TileWorkerData *const tile_data = (TileWorkerData*)arg1;

+  const TileInfo *const tile = (TileInfo*)arg2;

+  int mi_row, mi_col;

+  for (mi_row = tile->mi_row_start; mi_row < tile->mi_row_end;

+       mi_row += MI_BLOCK_SIZE) {

+    vp9_zero(tile_data->xd.left_context);

+    vp9_zero(tile_data->xd.left_seg_context);

+    for (mi_col = tile->mi_col_start; mi_col < tile->mi_col_end;

+         mi_col += MI_BLOCK_SIZE) {

+      decode_modes_sb(tile_data->cm, &tile_data->xd, tile,

+                      mi_row, mi_col, &tile_data->bit_reader, BLOCK_64X64,

+                      tile_data->token_cache);

+    }

+  }

+  return !tile_data->xd.corrupted;

+}

+static const uint8_t *decode_tiles_mt(VP9D_COMP *pbi, const uint8_t *data) {

+  VP9_COMMON *const cm = &pbi->common;

+  const uint8_t *const data_end = pbi->source + pbi->source_sz;

+  const int aligned_mi_cols = mi_cols_aligned_to_sb(cm->mi_cols);

+  const int tile_cols = 1 << cm->log2_tile_cols;

+  const int tile_rows = 1 << cm->log2_tile_rows;

+  const int num_workers = MIN(pbi->oxcf.max_threads & ~1, tile_cols);

+  int tile_col = 0;

+  assert(tile_rows == 1);

+  (void)tile_rows;

+  if (num_workers > pbi->num_tile_workers) {

+    int i;

+    CHECK_MEM_ERROR(cm, pbi->tile_workers,

+                    vpx_realloc(pbi->tile_workers,

+                                num_workers * sizeof(*pbi->tile_workers)));

+    for (i = pbi->num_tile_workers; i < num_workers; ++i) {

+      VP9Worker *const worker = &pbi->tile_workers[i];

+      ++pbi->num_tile_workers;

+      vp9_worker_init(worker);

+      worker->hook = (VP9WorkerHook)tile_worker_hook;

+      CHECK_MEM_ERROR(cm, worker->data1,

+                      vpx_memalign(32, sizeof(TileWorkerData)));

+      CHECK_MEM_ERROR(cm, worker->data2, vpx_malloc(sizeof(TileInfo)));

+      if (i < num_workers - 1 && !vp9_worker_reset(worker)) {

+        vpx_internal_error(&cm->error, VPX_CODEC_ERROR,

+                           "Tile decoder thread creation failed");

+      }

+    }

+  }

+  // Note: this memset assumes above_context[0], [1] and [2]

+  // are allocated as part of the same buffer.

+  vpx_memset(pbi->above_context[0], 0,

+             sizeof(*pbi->above_context[0]) * MAX_MB_PLANE *

+             2 * aligned_mi_cols);

+  vpx_memset(pbi->above_seg_context, 0,

+             sizeof(*pbi->above_seg_context) * aligned_mi_cols);

+  while (tile_col < tile_cols) {

+    int i;

+    for (i = 0; i < num_workers && tile_col < tile_cols; ++i) {

+      VP9Worker *const worker = &pbi->tile_workers[i];

+      TileWorkerData *const tile_data = (TileWorkerData*)worker->data1;

+      TileInfo *const tile = (TileInfo*)worker->data2;

+      const size_t size =

+          get_tile(data_end, tile_col == tile_cols - 1, &cm->error, &data);

+      tile_data->cm = cm;

+      tile_data->xd = pbi->mb;

+      tile_data->xd.corrupted = 0;

+      vp9_tile_init(tile, tile_data->cm, 0, tile_col);

+      setup_token_decoder(data, data_end, size, &cm->error,

+                          &tile_data->bit_reader);

+      setup_tile_context(pbi, &tile_data->xd, 0, tile_col);

+      setup_tile_macroblockd(tile_data);

+      worker->had_error = 0;

+      if (i == num_workers - 1 || tile_col == tile_cols - 1) {

+        vp9_worker_execute(worker);

+      } else {

+        vp9_worker_launch(worker);

+      }

+      data += size;

+      ++tile_col;

+    }

+    for (; i > 0; --i) {

+      VP9Worker *const worker = &pbi->tile_workers[i - 1];

+      pbi->mb.corrupted |= !vp9_worker_sync(worker);

+    }

+  }

+  {

+    const int final_worker = (tile_cols + num_workers - 1) % num_workers;

+    TileWorkerData *const tile_data =

+        (TileWorkerData*)pbi->tile_workers[final_worker].data1;

+    return vp9_reader_find_end(&tile_data->bit_reader);

+  }

+}

+static void check_sync_code(VP9_COMMON *cm, struct vp9_read_bit_buffer *rb) {

+  if (vp9_rb_read_literal(rb, 8) != VP9_SYNC_CODE_0 ||

+      vp9_rb_read_literal(rb, 8) != VP9_SYNC_CODE_1 ||

+      vp9_rb_read_literal(rb, 8) != VP9_SYNC_CODE_2) {

+    vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,

+                       "Invalid frame sync code");

+  }

+}

+static void error_handler(void *data, size_t bit_offset) {

+  VP9_COMMON *const cm = (VP9_COMMON *)data;

+  vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, "Truncated packet");

+}

+#define RESERVED \

+  if (vp9_rb_read_bit(rb)) \

+      vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM, \

+                         "Reserved bit must be unset")

+static size_t read_uncompressed_header(VP9D_COMP *pbi,

+                                       struct vp9_read_bit_buffer *rb) {

+  VP9_COMMON *const cm = &pbi->common;

+  size_t sz;

+  int i;

+  cm->last_frame_type = cm->frame_type;

+  if (vp9_rb_read_literal(rb, 2) != VP9_FRAME_MARKER)

+      vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,

+                         "Invalid frame marker");

+  cm->version = vp9_rb_read_bit(rb);

+  RESERVED;

+  if (vp9_rb_read_bit(rb)) {

+    // show an existing frame directly

+    int frame_to_show = cm->ref_frame_map[vp9_rb_read_literal(rb, 3)];

+    ref_cnt_fb(cm->fb_idx_ref_cnt, &cm->new_fb_idx, frame_to_show);

+    pbi->refresh_frame_flags = 0;

+    cm->lf.filter_level = 0;

+    return 0;

+  }

+  cm->frame_type = (FRAME_TYPE) vp9_rb_read_bit(rb);

+  cm->show_frame = vp9_rb_read_bit(rb);

+  cm->error_resilient_mode = vp9_rb_read_bit(rb);

+  if (cm->frame_type == KEY_FRAME) {

+    check_sync_code(cm, rb);

+    cm->color_space = vp9_rb_read_literal(rb, 3);  // colorspace

+    if (cm->color_space != SRGB) {

+      vp9_rb_read_bit(rb);  // [16,235] (including xvycc) vs [0,255] range

+      if (cm->version == 1) {

+        cm->subsampling_x = vp9_rb_read_bit(rb);

+        cm->subsampling_y = vp9_rb_read_bit(rb);

+        vp9_rb_read_bit(rb);  // has extra plane

+      } else {

+        cm->subsampling_y = cm->subsampling_x = 1;

+      }

+    } else {

+      if (cm->version == 1) {

+        cm->subsampling_y = cm->subsampling_x = 0;

+        vp9_rb_read_bit(rb);  // has extra plane

+      } else {

+        vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,

+                           "RGB not supported in profile 0");

+      }

+    }

+    pbi->refresh_frame_flags = (1 << NUM_REF_FRAMES) - 1;

+    for (i = 0; i < ALLOWED_REFS_PER_FRAME; ++i)

+      cm->active_ref_idx[i] = cm->new_fb_idx;

+    setup_frame_size(pbi, rb);

+  } else {

+    cm->intra_only = cm->show_frame ? 0 : vp9_rb_read_bit(rb);

+    cm->reset_frame_context = cm->error_resilient_mode ?

+        0 : vp9_rb_read_literal(rb, 2);

+    if (cm->intra_only) {

+      check_sync_code(cm, rb);

+      pbi->refresh_frame_flags = vp9_rb_read_literal(rb, NUM_REF_FRAMES);

+      setup_frame_size(pbi, rb);

+    } else {

+      pbi->refresh_frame_flags = vp9_rb_read_literal(rb, NUM_REF_FRAMES);

+      for (i = 0; i < ALLOWED_REFS_PER_FRAME; ++i) {

+        const int ref = vp9_rb_read_literal(rb, NUM_REF_FRAMES_LOG2);

+        cm->active_ref_idx[i] = cm->ref_frame_map[ref];

+        cm->ref_frame_sign_bias[LAST_FRAME + i] = vp9_rb_read_bit(rb);

+      }

+      setup_frame_size_with_refs(pbi, rb);

+      cm->allow_high_precision_mv = vp9_rb_read_bit(rb);

+      cm->mcomp_filter_type = read_interp_filter_type(rb);

+      for (i = 0; i < ALLOWED_REFS_PER_FRAME; ++i)

+        vp9_setup_scale_factors(cm, i);

+    }

+  }

+  if (!cm->error_resilient_mode) {

+    cm->refresh_frame_context = vp9_rb_read_bit(rb);

+    cm->frame_parallel_decoding_mode = vp9_rb_read_bit(rb);

+  } else {

+    cm->refresh_frame_context = 0;

+    cm->frame_parallel_decoding_mode = 1;

+  }

+  // This flag will be overridden by the call to vp9_setup_past_independence

+  // below, forcing the use of context 0 for those frame types.

+  cm->frame_context_idx = vp9_rb_read_literal(rb, NUM_FRAME_CONTEXTS_LOG2);

+  if (frame_is_intra_only(cm) || cm->error_resilient_mode)

+    vp9_setup_past_independence(cm);

+  setup_loopfilter(&cm->lf, rb);

+  setup_quantization(cm, &pbi->mb, rb);

+  setup_segmentation(&cm->seg, rb);

+  setup_tile_info(cm, rb);

+  sz = vp9_rb_read_literal(rb, 16);

+  if (sz == 0)

+    vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,

+                       "Invalid header size");

+  return sz;

+}

+static int read_compressed_header(VP9D_COMP *pbi, const uint8_t *data,

+                                  size_t partition_size) {

+  VP9_COMMON *const cm = &pbi->common;

+  MACROBLOCKD *const xd = &pbi->mb;

+  FRAME_CONTEXT *const fc = &cm->fc;

+  vp9_reader r;

+  int k;

+  if (vp9_reader_init(&r, data, partition_size))

+    vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR,

+                       "Failed to allocate bool decoder 0");

+  cm->tx_mode = xd->lossless ? ONLY_4X4 : read_tx_mode(&r);

+  if (cm->tx_mode == TX_MODE_SELECT)

+    read_tx_probs(&fc->tx_probs, &r);

+  read_coef_probs(fc, cm->tx_mode, &r);

+  for (k = 0; k < MBSKIP_CONTEXTS; ++k)

+    vp9_diff_update_prob(&r, &fc->mbskip_probs[k]);

+  if (!frame_is_intra_only(cm)) {

+    nmv_context *const nmvc = &fc->nmvc;

+    int i, j;

+    read_inter_mode_probs(fc, &r);

+    if (cm->mcomp_filter_type == SWITCHABLE)

+      read_switchable_interp_probs(fc, &r);

+    for (i = 0; i < INTRA_INTER_CONTEXTS; i++)

+      vp9_diff_update_prob(&r, &fc->intra_inter_prob[i]);

+    read_comp_pred(cm, &r);

+    for (j = 0; j < BLOCK_SIZE_GROUPS; j++)

+      for (i = 0; i < INTRA_MODES - 1; ++i)

+        vp9_diff_update_prob(&r, &fc->y_mode_prob[j][i]);

+    for (j = 0; j < PARTITION_CONTEXTS; ++j)

+      for (i = 0; i < PARTITION_TYPES - 1; ++i)

+        vp9_diff_update_prob(&r, &fc->partition_prob[j][i]);

+    read_mv_probs(nmvc, cm->allow_high_precision_mv, &r);

+  }

+  return vp9_reader_has_error(&r);

+}

+void vp9_init_dequantizer(VP9_COMMON *cm) {

+  int q;

+  for (q = 0; q < QINDEX_RANGE; q++) {

+    cm->y_dequant[q][0] = vp9_dc_quant(q, cm->y_dc_delta_q);

+    cm->y_dequant[q][1] = vp9_ac_quant(q, 0);

+    cm->uv_dequant[q][0] = vp9_dc_quant(q, cm->uv_dc_delta_q);

+    cm->uv_dequant[q][1] = vp9_ac_quant(q, cm->uv_ac_delta_q);

+  }

+}

+#ifdef NDEBUG

+#define debug_check_frame_counts(cm) (void)0

+#else  // !NDEBUG

+// Counts should only be incremented when frame_parallel_decoding_mode and

+// error_resilient_mode are disabled.

+static void debug_check_frame_counts(const VP9_COMMON *const cm) {

+  FRAME_COUNTS zero_counts;

+  vp9_zero(zero_counts);

+  assert(cm->frame_parallel_decoding_mode || cm->error_resilient_mode);

+  assert(!memcmp(cm->counts.y_mode, zero_counts.y_mode,

+                 sizeof(cm->counts.y_mode)));

+  assert(!memcmp(cm->counts.uv_mode, zero_counts.uv_mode,

+                 sizeof(cm->counts.uv_mode)));

+  assert(!memcmp(cm->counts.partition, zero_counts.partition,

+                 sizeof(cm->counts.partition)));

+  assert(!memcmp(cm->counts.coef, zero_counts.coef,

+                 sizeof(cm->counts.coef)));

+  assert(!memcmp(cm->counts.eob_branch, zero_counts.eob_branch,

+                 sizeof(cm->counts.eob_branch)));

+  assert(!memcmp(cm->counts.switchable_interp, zero_counts.switchable_interp,

+                 sizeof(cm->counts.switchable_interp)));

+  assert(!memcmp(cm->counts.inter_mode, zero_counts.inter_mode,

+                 sizeof(cm->counts.inter_mode)));

+  assert(!memcmp(cm->counts.intra_inter, zero_counts.intra_inter,

+                 sizeof(cm->counts.intra_inter)));

+  assert(!memcmp(cm->counts.comp_inter, zero_counts.comp_inter,

+                 sizeof(cm->counts.comp_inter)));

+  assert(!memcmp(cm->counts.single_ref, zero_counts.single_ref,

+                 sizeof(cm->counts.single_ref)));

+  assert(!memcmp(cm->counts.comp_ref, zero_counts.comp_ref,

+                 sizeof(cm->counts.comp_ref)));

+  assert(!memcmp(&cm->counts.tx, &zero_counts.tx, sizeof(cm->counts.tx)));

+  assert(!memcmp(cm->counts.mbskip, zero_counts.mbskip,

+                 sizeof(cm->counts.mbskip)));

+  assert(!memcmp(&cm->counts.mv, &zero_counts.mv, sizeof(cm->counts.mv)));

+}

+#endif  // NDEBUG

+int vp9_decode_frame(VP9D_COMP *pbi, const uint8_t **p_data_end) {

+  int i;

+  VP9_COMMON *const cm = &pbi->common;

+  MACROBLOCKD *const xd = &pbi->mb;

+  const uint8_t *data = pbi->source;

+  const uint8_t *const data_end = pbi->source + pbi->source_sz;

+  struct vp9_read_bit_buffer rb = { data, data_end, 0, cm, error_handler };

+  const size_t first_partition_size = read_uncompressed_header(pbi, &rb);

+  const int keyframe = cm->frame_type == KEY_FRAME;

+  const int tile_rows = 1 << cm->log2_tile_rows;

+  const int tile_cols = 1 << cm->log2_tile_cols;

+  YV12_BUFFER_CONFIG *const new_fb = get_frame_new_buffer(cm);

+  if (!first_partition_size) {

+      // showing a frame directly

+      *p_data_end = data + 1;

+      return 0;

+  }

+  if (!pbi->decoded_key_frame && !keyframe)

+    return -1;

+  data += vp9_rb_bytes_read(&rb);

+  if (!read_is_valid(data, first_partition_size, data_end))

+    vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,

+                       "Truncated packet or corrupt header length");

+  pbi->do_loopfilter_inline =

+      (cm->log2_tile_rows | cm->log2_tile_cols) == 0 && cm->lf.filter_level;

+  if (pbi->do_loopfilter_inline && pbi->lf_worker.data1 == NULL) {

+    CHECK_MEM_ERROR(cm, pbi->lf_worker.data1, vpx_malloc(sizeof(LFWorkerData)));

+    pbi->lf_worker.hook = (VP9WorkerHook)vp9_loop_filter_worker;

+    if (pbi->oxcf.max_threads > 1 && !vp9_worker_reset(&pbi->lf_worker)) {

+      vpx_internal_error(&cm->error, VPX_CODEC_ERROR,

+                         "Loop filter thread creation failed");

+    }

+  }

+  alloc_tile_storage(pbi, tile_rows, tile_cols);

+  xd->mode_info_stride = cm->mode_info_stride;

+  set_prev_mi(cm);

+  setup_plane_dequants(cm, xd, cm->base_qindex);

+  setup_block_dptrs(xd, cm->subsampling_x, cm->subsampling_y);

+  cm->fc = cm->frame_contexts[cm->frame_context_idx];

+  vp9_zero(cm->counts);

+  for (i = 0; i < MAX_MB_PLANE; ++i)

+    vpx_memset(xd->plane[i].dqcoeff, 0, 64 * 64 * sizeof(int16_t));

+  xd->corrupted = 0;

+  new_fb->corrupted = read_compressed_header(pbi, data, first_partition_size);

+  // TODO(jzern): remove frame_parallel_decoding_mode restriction for

+  // single-frame tile decoding.

+  if (pbi->oxcf.max_threads > 1 && tile_rows == 1 && tile_cols > 1 &&

+      cm->frame_parallel_decoding_mode) {

+    *p_data_end = decode_tiles_mt(pbi, data + first_partition_size);

+  } else {

+    *p_data_end = decode_tiles(pbi, data + first_partition_size);

+  }

+  cm->last_width = cm->width;

+  cm->last_height = cm->height;

+  new_fb->corrupted |= xd->corrupted;

+  if (!pbi->decoded_key_frame) {

+    if (keyframe && !new_fb->corrupted)

+      pbi->decoded_key_frame = 1;

+    else

+      vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,

+                         "A stream must start with a complete key frame");

+  }

+  if (!cm->error_resilient_mode && !cm->frame_parallel_decoding_mode) {

+    vp9_adapt_coef_probs(cm);

+    if (!frame_is_intra_only(cm)) {

+      vp9_adapt_mode_probs(cm);

+      vp9_adapt_mv_probs(cm, cm->allow_high_precision_mv);

+    }

+  } else {

+    debug_check_frame_counts(cm);

+  }

+  if (cm->refresh_frame_context)

+    cm->frame_contexts[cm->frame_context_idx] = cm->fc;

+  return 0;

+}

--- /dev/null

+++ b/vp9/decoder/vp9_decodeframe.h

@@ -1,0 +1,21 @@

+/*

+ *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.

+ *

+ *  Use of this source code is governed by a BSD-style license

+ *  that can be found in the LICENSE file in the root of the source

+ *  tree. An additional intellectual property rights grant can be found

+ *  in the file PATENTS.  All contributing project authors may

+ *  be found in the AUTHORS file in the root of the source tree.

+ */

+#ifndef VP9_DECODER_VP9_DECODEFRAME_H_

+#define VP9_DECODER_VP9_DECODEFRAME_H_

+struct VP9Common;

+struct VP9Decompressor;

+void vp9_init_dequantizer(struct VP9Common *cm);

+int vp9_decode_frame(struct VP9Decompressor *cpi, const uint8_t **p_data_end);

+#endif  // VP9_DECODER_VP9_DECODEFRAME_H_

--- a/vp9/decoder/vp9_decodemv.c

+++ b/vp9/decoder/vp9_decodemv.c

@@ -21,7 +21,7 @@

 #include "vp9/common/vp9_seg_common.h"

 #include "vp9/decoder/vp9_decodemv.h"

-#include "vp9/decoder/vp9_decodframe.h"

+#include "vp9/decoder/vp9_decodeframe.h"

 #include "vp9/decoder/vp9_onyxd_int.h"

 #include "vp9/decoder/vp9_treereader.h"

--- a/vp9/decoder/vp9_decodframe.c

+++ /dev/null

@@ -1,1384 +1,0 @@

-/*

- *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.

- *

- *  Use of this source code is governed by a BSD-style license

- *  that can be found in the LICENSE file in the root of the source

- *  tree. An additional intellectual property rights grant can be found

- *  in the file PATENTS.  All contributing project authors may

- *  be found in the AUTHORS file in the root of the source tree.

- */

-#include <assert.h>

-#include "./vp9_rtcd.h"

-#include "vpx_mem/vpx_mem.h"

-#include "vpx_scale/vpx_scale.h"

-#include "vp9/common/vp9_alloccommon.h"

-#include "vp9/common/vp9_common.h"

-#include "vp9/common/vp9_entropy.h"

-#include "vp9/common/vp9_entropymode.h"

-#include "vp9/common/vp9_extend.h"

-#include "vp9/common/vp9_idct.h"

-#include "vp9/common/vp9_pred_common.h"

-#include "vp9/common/vp9_quant_common.h"

-#include "vp9/common/vp9_reconintra.h"

-#include "vp9/common/vp9_reconinter.h"

-#include "vp9/common/vp9_seg_common.h"

-#include "vp9/common/vp9_tile_common.h"

-#include "vp9/decoder/vp9_dboolhuff.h"

-#include "vp9/decoder/vp9_decodframe.h"

-#include "vp9/decoder/vp9_detokenize.h"

-#include "vp9/decoder/vp9_decodemv.h"

-#include "vp9/decoder/vp9_dsubexp.h"

-#include "vp9/decoder/vp9_onyxd_int.h"

-#include "vp9/decoder/vp9_read_bit_buffer.h"

-#include "vp9/decoder/vp9_thread.h"

-#include "vp9/decoder/vp9_treereader.h"

-typedef struct TileWorkerData {

-  VP9_COMMON *cm;

-  vp9_reader bit_reader;

-  DECLARE_ALIGNED(16, MACROBLOCKD, xd);

-  DECLARE_ALIGNED(16, unsigned char, token_cache[1024]);

-  DECLARE_ALIGNED(16, int16_t,  qcoeff[MAX_MB_PLANE][64 * 64]);

-  DECLARE_ALIGNED(16, int16_t,  dqcoeff[MAX_MB_PLANE][64 * 64]);

-  DECLARE_ALIGNED(16, uint16_t, eobs[MAX_MB_PLANE][256]);

-} TileWorkerData;

-static int read_be32(const uint8_t *p) {

-  return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];

-}

-static int is_compound_prediction_allowed(const VP9_COMMON *cm) {

-  int i;

-  for (i = 1; i < ALLOWED_REFS_PER_FRAME; ++i)

-    if  (cm->ref_frame_sign_bias[i + 1] != cm->ref_frame_sign_bias[1])

-      return 1;

-  return 0;

-}

-static void setup_compound_prediction(VP9_COMMON *cm) {

-  if (cm->ref_frame_sign_bias[LAST_FRAME] ==

-          cm->ref_frame_sign_bias[GOLDEN_FRAME]) {

-    cm->comp_fixed_ref = ALTREF_FRAME;

-    cm->comp_var_ref[0] = LAST_FRAME;

-    cm->comp_var_ref[1] = GOLDEN_FRAME;

-  } else if (cm->ref_frame_sign_bias[LAST_FRAME] ==

-                 cm->ref_frame_sign_bias[ALTREF_FRAME]) {

-    cm->comp_fixed_ref = GOLDEN_FRAME;

-    cm->comp_var_ref[0] = LAST_FRAME;

-    cm->comp_var_ref[1] = ALTREF_FRAME;

-  } else {

-    cm->comp_fixed_ref = LAST_FRAME;

-    cm->comp_var_ref[0] = GOLDEN_FRAME;

-    cm->comp_var_ref[1] = ALTREF_FRAME;

-  }

-}

-// len == 0 is not allowed

-static int read_is_valid(const uint8_t *start, size_t len, const uint8_t *end) {

-  return start + len > start && start + len <= end;

-}

-static int decode_unsigned_max(struct vp9_read_bit_buffer *rb, int max) {

-  const int data = vp9_rb_read_literal(rb, get_unsigned_bits(max));

-  return data > max ? max : data;

-}

-static TX_MODE read_tx_mode(vp9_reader *r) {

-  TX_MODE tx_mode = vp9_read_literal(r, 2);

-  if (tx_mode == ALLOW_32X32)

-    tx_mode += vp9_read_bit(r);

-  return tx_mode;

-}

-static void read_tx_probs(struct tx_probs *tx_probs, vp9_reader *r) {

-  int i, j;

-  for (i = 0; i < TX_SIZE_CONTEXTS; ++i)

-    for (j = 0; j < TX_SIZES - 3; ++j)

-      vp9_diff_update_prob(r, &tx_probs->p8x8[i][j]);

-  for (i = 0; i < TX_SIZE_CONTEXTS; ++i)

-    for (j = 0; j < TX_SIZES - 2; ++j)

-      vp9_diff_update_prob(r, &tx_probs->p16x16[i][j]);

-  for (i = 0; i < TX_SIZE_CONTEXTS; ++i)

-    for (j = 0; j < TX_SIZES - 1; ++j)

-      vp9_diff_update_prob(r, &tx_probs->p32x32[i][j]);

-}

-static void read_switchable_interp_probs(FRAME_CONTEXT *fc, vp9_reader *r) {

-  int i, j;

-  for (j = 0; j < SWITCHABLE_FILTER_CONTEXTS; ++j)

-    for (i = 0; i < SWITCHABLE_FILTERS - 1; ++i)

-      vp9_diff_update_prob(r, &fc->switchable_interp_prob[j][i]);

-}

-static void read_inter_mode_probs(FRAME_CONTEXT *fc, vp9_reader *r) {

-  int i, j;

-  for (i = 0; i < INTER_MODE_CONTEXTS; ++i)

-    for (j = 0; j < INTER_MODES - 1; ++j)

-      vp9_diff_update_prob(r, &fc->inter_mode_probs[i][j]);

-}

-static INLINE COMPPREDMODE_TYPE read_comp_pred_mode(vp9_reader *r) {

-  COMPPREDMODE_TYPE mode = vp9_read_bit(r);

-  if (mode)

-    mode += vp9_read_bit(r);

-  return mode;

-}

-static void read_comp_pred(VP9_COMMON *cm, vp9_reader *r) {

-  int i;

-  const int compound_allowed = is_compound_prediction_allowed(cm);

-  cm->comp_pred_mode = compound_allowed ? read_comp_pred_mode(r)

-                                        : SINGLE_PREDICTION_ONLY;

-  if (compound_allowed)

-    setup_compound_prediction(cm);

-  if (cm->comp_pred_mode == HYBRID_PREDICTION)

-    for (i = 0; i < COMP_INTER_CONTEXTS; i++)

-      vp9_diff_update_prob(r, &cm->fc.comp_inter_prob[i]);

-  if (cm->comp_pred_mode != COMP_PREDICTION_ONLY)

-    for (i = 0; i < REF_CONTEXTS; i++) {

-      vp9_diff_update_prob(r, &cm->fc.single_ref_prob[i][0]);

-      vp9_diff_update_prob(r, &cm->fc.single_ref_prob[i][1]);

-    }

-  if (cm->comp_pred_mode != SINGLE_PREDICTION_ONLY)

-    for (i = 0; i < REF_CONTEXTS; i++)

-      vp9_diff_update_prob(r, &cm->fc.comp_ref_prob[i]);

-}

-static void update_mv_probs(vp9_prob *p, int n, vp9_reader *r) {

-  int i;

-  for (i = 0; i < n; ++i)

-    if (vp9_read(r, NMV_UPDATE_PROB))

-       p[i] = (vp9_read_literal(r, 7) << 1) | 1;

-}

-static void read_mv_probs(nmv_context *ctx, int allow_hp, vp9_reader *r) {

-  int i, j;

-  update_mv_probs(ctx->joints, MV_JOINTS - 1, r);

-  for (i = 0; i < 2; ++i) {

-    nmv_component *const comp_ctx = &ctx->comps[i];

-    update_mv_probs(&comp_ctx->sign, 1, r);

-    update_mv_probs(comp_ctx->classes, MV_CLASSES - 1, r);

-    update_mv_probs(comp_ctx->class0, CLASS0_SIZE - 1, r);

-    update_mv_probs(comp_ctx->bits, MV_OFFSET_BITS, r);

-  }

-  for (i = 0; i < 2; ++i) {

-    nmv_component *const comp_ctx = &ctx->comps[i];

-    for (j = 0; j < CLASS0_SIZE; ++j)

-      update_mv_probs(comp_ctx->class0_fp[j], 3, r);

-    update_mv_probs(comp_ctx->fp, 3, r);

-  }

-  if (allow_hp) {

-    for (i = 0; i < 2; ++i) {

-      nmv_component *const comp_ctx = &ctx->comps[i];

-      update_mv_probs(&comp_ctx->class0_hp, 1, r);

-      update_mv_probs(&comp_ctx->hp, 1, r);

-    }

-  }

-}

-static void setup_plane_dequants(VP9_COMMON *cm, MACROBLOCKD *xd, int q_index) {

-  int i;

-  xd->plane[0].dequant = cm->y_dequant[q_index];

-  for (i = 1; i < MAX_MB_PLANE; i++)

-    xd->plane[i].dequant = cm->uv_dequant[q_index];

-}

-// Allocate storage for each tile column.

-// TODO(jzern): when max_threads <= 1 the same storage could be used for each

-// tile.

-static void alloc_tile_storage(VP9D_COMP *pbi, int tile_rows, int tile_cols) {

-  VP9_COMMON *const cm = &pbi->common;

-  const int aligned_mi_cols = mi_cols_aligned_to_sb(cm->mi_cols);

-  int i, tile_row, tile_col;

-  CHECK_MEM_ERROR(cm, pbi->mi_streams,

-                  vpx_realloc(pbi->mi_streams, tile_rows * tile_cols *

-                              sizeof(*pbi->mi_streams)));

-  for (tile_row = 0; tile_row < tile_rows; ++tile_row) {

-    for (tile_col = 0; tile_col < tile_cols; ++tile_col) {

-      TileInfo tile;

-      vp9_tile_init(&tile, cm, tile_row, tile_col);

-      pbi->mi_streams[tile_row * tile_cols + tile_col] =

-          &cm->mi[tile.mi_row_start * cm->mode_info_stride

-                  + tile.mi_col_start];

-    }

-  }

-  // 2 contexts per 'mi unit', so that we have one context per 4x4 txfm

-  // block where mi unit size is 8x8.

-  CHECK_MEM_ERROR(cm, pbi->above_context[0],

-                  vpx_realloc(pbi->above_context[0],

-                              sizeof(*pbi->above_context[0]) * MAX_MB_PLANE *

-                              2 * aligned_mi_cols));

-  for (i = 1; i < MAX_MB_PLANE; ++i) {

-    pbi->above_context[i] = pbi->above_context[0] +

-                            i * sizeof(*pbi->above_context[0]) *

-                            2 * aligned_mi_cols;

-  }

-  // This is sized based on the entire frame. Each tile operates within its

-  // column bounds.

-  CHECK_MEM_ERROR(cm, pbi->above_seg_context,

-                  vpx_realloc(pbi->above_seg_context,

-                              sizeof(*pbi->above_seg_context) *

-                              aligned_mi_cols));

-}

-static void inverse_transform_block(MACROBLOCKD* xd, int plane, int block,

-                                    TX_SIZE tx_size, int x, int y) {

-  struct macroblockd_plane *const pd = &xd->plane[plane];

-  const int eob = pd->eobs[block];

-  if (eob > 0) {

-    TX_TYPE tx_type;

-    const int plane_type = pd->plane_type;

-    const int stride = pd->dst.stride;

-    int16_t *const dqcoeff = BLOCK_OFFSET(pd->dqcoeff, block);

-    uint8_t *const dst = &pd->dst.buf[4 * y * stride + 4 * x];

-    switch (tx_size) {

-      case TX_4X4:

-        tx_type = get_tx_type_4x4(plane_type, xd, block);

-        if (tx_type == DCT_DCT)

-          xd->itxm_add(dqcoeff, dst, stride, eob);

-        else

-          vp9_iht4x4_16_add(dqcoeff, dst, stride, tx_type);

-        break;

-      case TX_8X8:

-        tx_type = get_tx_type_8x8(plane_type, xd);

-        vp9_iht8x8_add(tx_type, dqcoeff, dst, stride, eob);

-        break;

-      case TX_16X16:

-        tx_type = get_tx_type_16x16(plane_type, xd);

-        vp9_iht16x16_add(tx_type, dqcoeff, dst, stride, eob);

-        break;

-      case TX_32X32:

-        tx_type = DCT_DCT;

-        vp9_idct32x32_add(dqcoeff, dst, stride, eob);

-        break;

-      default:

-        assert(!"Invalid transform size");

-    }

-    if (eob == 1) {

-      vpx_memset(dqcoeff, 0, 2 * sizeof(dqcoeff[0]));

-    } else {

-      if (tx_type == DCT_DCT && tx_size <= TX_16X16 && eob <= 10)

-        vpx_memset(dqcoeff, 0, 4 * (4 << tx_size) * sizeof(dqcoeff[0]));

-      else if (tx_size == TX_32X32 && eob <= 34)

-        vpx_memset(dqcoeff, 0, 256 * sizeof(dqcoeff[0]));

-      else

-        vpx_memset(dqcoeff, 0, (16 << (tx_size << 1)) * sizeof(dqcoeff[0]));

-    }

-  }

-}

-struct intra_args {

-  VP9_COMMON *cm;

-  MACROBLOCKD *xd;

-  vp9_reader *r;

-  uint8_t *token_cache;

-};

-static void predict_and_reconstruct_intra_block(int plane, int block,

-                                                BLOCK_SIZE plane_bsize,

-                                                TX_SIZE tx_size, void *arg) {

-  struct intra_args *const args = arg;

-  VP9_COMMON *const cm = args->cm;

-  MACROBLOCKD *const xd = args->xd;

-  struct macroblockd_plane *const pd = &xd->plane[plane];

-  MODE_INFO *const mi = xd->mi_8x8[0];

-  const MB_PREDICTION_MODE mode = (plane == 0)

-          ? ((mi->mbmi.sb_type < BLOCK_8X8) ? mi->bmi[block].as_mode

-                                            : mi->mbmi.mode)

-          : mi->mbmi.uv_mode;

-  int x, y;

-  uint8_t *dst;

-  txfrm_block_to_raster_xy(plane_bsize, tx_size, block, &x, &y);

-  dst = &pd->dst.buf[4 * y * pd->dst.stride + 4 * x];

-  if (xd->mb_to_right_edge < 0 || xd->mb_to_bottom_edge < 0)

-    extend_for_intra(xd, plane_bsize, plane, block, tx_size);

-  vp9_predict_intra_block(xd, block >> (tx_size << 1),

-                          b_width_log2(plane_bsize), tx_size, mode,

-                          dst, pd->dst.stride, dst, pd->dst.stride);

-  if (!mi->mbmi.skip_coeff) {

-    vp9_decode_block_tokens(cm, xd, plane, block, plane_bsize, x, y, tx_size,

-                            args->r, args->token_cache);

-    inverse_transform_block(xd, plane, block, tx_size, x, y);

-  }

-}

-struct inter_args {

-  VP9_COMMON *cm;

-  MACROBLOCKD *xd;

-  vp9_reader *r;

-  int *eobtotal;

-  uint8_t *token_cache;

-};

-static void reconstruct_inter_block(int plane, int block,

-                                    BLOCK_SIZE plane_bsize,

-                                    TX_SIZE tx_size, void *arg) {

-  struct inter_args *args = arg;

-  VP9_COMMON *const cm = args->cm;

-  MACROBLOCKD *const xd = args->xd;

-  int x, y;

-  txfrm_block_to_raster_xy(plane_bsize, tx_size, block, &x, &y);

-  *args->eobtotal += vp9_decode_block_tokens(cm, xd, plane, block,

-                                             plane_bsize, x, y, tx_size,

-                                             args->r, args->token_cache);

-  inverse_transform_block(xd, plane, block, tx_size, x, y);

-}

-static void set_offsets(VP9_COMMON *const cm, MACROBLOCKD *const xd,

-                        const TileInfo *const tile,

-                        BLOCK_SIZE bsize, int mi_row, int mi_col) {

-  const int bh = num_8x8_blocks_high_lookup[bsize];

-  const int bw = num_8x8_blocks_wide_lookup[bsize];

-  const int offset = mi_row * cm->mode_info_stride + mi_col;

-  const int tile_offset = tile->mi_row_start * cm->mode_info_stride +

-                          tile->mi_col_start;

-  xd->mi_8x8 = cm->mi_grid_visible + offset;

-  xd->prev_mi_8x8 = cm->prev_mi_grid_visible + offset;

-  // we are using the mode info context stream here

-  xd->mi_8x8[0] = xd->mi_stream + offset - tile_offset;

-  xd->mi_8x8[0]->mbmi.sb_type = bsize;

-  // Special case: if prev_mi is NULL, the previous mode info context

-  // cannot be used.

-  xd->last_mi = cm->prev_mi ? xd->prev_mi_8x8[0] : NULL;

-  set_skip_context(xd, xd->above_context, xd->left_context, mi_row, mi_col);

-  // Distance of Mb to the various image edges. These are specified to 8th pel

-  // as they are always compared to values that are in 1/8th pel units

-  set_mi_row_col(xd, tile, mi_row, bh, mi_col, bw, cm->mi_rows, cm->mi_cols);

-  setup_dst_planes(xd, get_frame_new_buffer(cm), mi_row, mi_col);

-}

-static void set_ref(VP9_COMMON *const cm, MACROBLOCKD *const xd,

-                    int idx, int mi_row, int mi_col) {

-  MB_MODE_INFO *const mbmi = &xd->mi_8x8[0]->mbmi;

-  const int ref = mbmi->ref_frame[idx] - LAST_FRAME;

-  const YV12_BUFFER_CONFIG *cfg = get_frame_ref_buffer(cm, ref);

-  const struct scale_factors_common *sfc = &cm->active_ref_scale_comm[ref];

-  if (!vp9_is_valid_scale(sfc))

-    vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,

-                       "Invalid scale factors");

-  xd->scale_factor[idx].sfc = sfc;

-  setup_pre_planes(xd, idx, cfg, mi_row, mi_col, &xd->scale_factor[idx]);

-  xd->corrupted |= cfg->corrupted;

-}

-static void decode_modes_b(VP9_COMMON *const cm, MACROBLOCKD *const xd,

-                           const TileInfo *const tile,

-                           int mi_row, int mi_col,

-                           vp9_reader *r, BLOCK_SIZE bsize,

-                           uint8_t *token_cache) {

-  const int less8x8 = bsize < BLOCK_8X8;

-  MB_MODE_INFO *mbmi;

-  set_offsets(cm, xd, tile, bsize, mi_row, mi_col);

-  vp9_read_mode_info(cm, xd, tile, mi_row, mi_col, r);

-  if (less8x8)

-    bsize = BLOCK_8X8;

-  // Has to be called after set_offsets

-  mbmi = &xd->mi_8x8[0]->mbmi;

-  if (mbmi->skip_coeff) {

-    reset_skip_context(xd, bsize);

-  } else {

-    if (cm->seg.enabled)

-      setup_plane_dequants(cm, xd, vp9_get_qindex(&cm->seg, mbmi->segment_id,

-                                                  cm->base_qindex));

-  }

-  if (!is_inter_block(mbmi)) {

-    struct intra_args arg = {

-      cm, xd, r, token_cache

-    };

-    foreach_transformed_block(xd, bsize, predict_and_reconstruct_intra_block,

-                              &arg);

-  } else {

-    // Setup

-    set_ref(cm, xd, 0, mi_row, mi_col);

-    if (has_second_ref(mbmi))

-      set_ref(cm, xd, 1, mi_row, mi_col);

-    xd->subpix.filter_x = xd->subpix.filter_y =

-        vp9_get_filter_kernel(mbmi->interp_filter);

-    // Prediction

-    vp9_build_inter_predictors_sb(xd, mi_row, mi_col, bsize);

-    // Reconstruction

-    if (!mbmi->skip_coeff) {

-      int eobtotal = 0;

-      struct inter_args arg = {

-        cm, xd, r, &eobtotal, token_cache

-      };

-      foreach_transformed_block(xd, bsize, reconstruct_inter_block, &arg);

-      if (!less8x8 && eobtotal == 0)

-        mbmi->skip_coeff = 1;  // skip loopfilter

-    }

-  }

-  xd->corrupted |= vp9_reader_has_error(r);

-}

-static PARTITION_TYPE read_partition(VP9_COMMON *cm, MACROBLOCKD *xd, int hbs,

-                                     int mi_row, int mi_col, BLOCK_SIZE bsize,

-                                     vp9_reader *r) {

-  const int ctx = partition_plane_context(xd->above_seg_context,

-                                          xd->left_seg_context,

-                                          mi_row, mi_col, bsize);

-  const vp9_prob *const probs = get_partition_probs(cm, ctx);

-  const int has_rows = (mi_row + hbs) < cm->mi_rows;

-  const int has_cols = (mi_col + hbs) < cm->mi_cols;

-  PARTITION_TYPE p;

-  if (has_rows && has_cols)

-    p = treed_read(r, vp9_partition_tree, probs);

-  else if (!has_rows && has_cols)

-    p = vp9_read(r, probs[1]) ? PARTITION_SPLIT : PARTITION_HORZ;

-  else if (has_rows && !has_cols)

-    p = vp9_read(r, probs[2]) ? PARTITION_SPLIT : PARTITION_VERT;

-  else

-    p = PARTITION_SPLIT;

-  if (!cm->frame_parallel_decoding_mode)

-    ++cm->counts.partition[ctx][p];

-  return p;

-}

-static void decode_modes_sb(VP9_COMMON *const cm, MACROBLOCKD *const xd,

-                            const TileInfo *const tile,

-                            int mi_row, int mi_col,

-                            vp9_reader* r, BLOCK_SIZE bsize,

-                            uint8_t *token_cache) {

-  const int hbs = num_8x8_blocks_wide_lookup[bsize] / 2;

-  PARTITION_TYPE partition;

-  BLOCK_SIZE subsize;

-  if (mi_row >= cm->mi_rows || mi_col >= cm->mi_cols)

-    return;

-  partition = read_partition(cm, xd, hbs, mi_row, mi_col, bsize, r);

-  subsize = get_subsize(bsize, partition);

-  if (subsize < BLOCK_8X8) {

-    decode_modes_b(cm, xd, tile, mi_row, mi_col, r, subsize, token_cache);

-  } else {

-    switch (partition) {

-      case PARTITION_NONE:

-        decode_modes_b(cm, xd, tile, mi_row, mi_col, r, subsize, token_cache);

-        break;

-      case PARTITION_HORZ:

-        decode_modes_b(cm, xd, tile, mi_row, mi_col, r, subsize, token_cache);

-        if (mi_row + hbs < cm->mi_rows)

-          decode_modes_b(cm, xd, tile, mi_row + hbs, mi_col, r, subsize,

-                         token_cache);

-        break;

-      case PARTITION_VERT:

-        decode_modes_b(cm, xd, tile, mi_row, mi_col, r, subsize, token_cache);

-        if (mi_col + hbs < cm->mi_cols)

-          decode_modes_b(cm, xd, tile, mi_row, mi_col + hbs, r, subsize,

-                         token_cache);

-        break;

-      case PARTITION_SPLIT:

-        decode_modes_sb(cm, xd, tile, mi_row, mi_col, r, subsize,

-                        token_cache);

-        decode_modes_sb(cm, xd, tile, mi_row, mi_col + hbs, r, subsize,

-                        token_cache);

-        decode_modes_sb(cm, xd, tile, mi_row + hbs, mi_col, r, subsize,

-                        token_cache);

-        decode_modes_sb(cm, xd, tile, mi_row + hbs, mi_col + hbs, r, subsize,

-                        token_cache);

-        break;

-      default:

-        assert(!"Invalid partition type");

-    }

-  }

-  // update partition context

-  if (bsize >= BLOCK_8X8 &&

-      (bsize == BLOCK_8X8 || partition != PARTITION_SPLIT))

-    update_partition_context(xd->above_seg_context, xd->left_seg_context,

-                             mi_row, mi_col, subsize, bsize);

-}

-static void setup_token_decoder(const uint8_t *data,

-                                const uint8_t *data_end,

-                                size_t read_size,

-                                struct vpx_internal_error_info *error_info,

-                                vp9_reader *r) {

-  // Validate the calculated partition length. If the buffer

-  // described by the partition can't be fully read, then restrict

-  // it to the portion that can be (for EC mode) or throw an error.

-  if (!read_is_valid(data, read_size, data_end))

-    vpx_internal_error(error_info, VPX_CODEC_CORRUPT_FRAME,

-                       "Truncated packet or corrupt tile length");

-  if (vp9_reader_init(r, data, read_size))

-    vpx_internal_error(error_info, VPX_CODEC_MEM_ERROR,

-                       "Failed to allocate bool decoder %d", 1);

-}

-static void read_coef_probs_common(vp9_coeff_probs_model *coef_probs,

-                                   vp9_reader *r) {

-  int i, j, k, l, m;

-  if (vp9_read_bit(r))

-    for (i = 0; i < BLOCK_TYPES; i++)

-      for (j = 0; j < REF_TYPES; j++)

-        for (k = 0; k < COEF_BANDS; k++)

-          for (l = 0; l < PREV_COEF_CONTEXTS; l++)

-            if (k > 0 || l < 3)

-              for (m = 0; m < UNCONSTRAINED_NODES; m++)

-                vp9_diff_update_prob(r, &coef_probs[i][j][k][l][m]);

-}

-static void read_coef_probs(FRAME_CONTEXT *fc, TX_MODE tx_mode,

-                            vp9_reader *r) {

-    const TX_SIZE max_tx_size = tx_mode_to_biggest_tx_size[tx_mode];

-    TX_SIZE tx_size;

-    for (tx_size = TX_4X4; tx_size <= max_tx_size; ++tx_size)

-      read_coef_probs_common(fc->coef_probs[tx_size], r);

-}

-static void setup_segmentation(struct segmentation *seg,

-                               struct vp9_read_bit_buffer *rb) {

-  int i, j;

-  seg->update_map = 0;

-  seg->update_data = 0;

-  seg->enabled = vp9_rb_read_bit(rb);

-  if (!seg->enabled)

-    return;

-  // Segmentation map update

-  seg->update_map = vp9_rb_read_bit(rb);

-  if (seg->update_map) {

-    for (i = 0; i < SEG_TREE_PROBS; i++)

-      seg->tree_probs[i] = vp9_rb_read_bit(rb) ? vp9_rb_read_literal(rb, 8)

-                                               : MAX_PROB;

-    seg->temporal_update = vp9_rb_read_bit(rb);

-    if (seg->temporal_update) {

-      for (i = 0; i < PREDICTION_PROBS; i++)

-        seg->pred_probs[i] = vp9_rb_read_bit(rb) ? vp9_rb_read_literal(rb, 8)

-                                                 : MAX_PROB;

-    } else {

-      for (i = 0; i < PREDICTION_PROBS; i++)

-        seg->pred_probs[i] = MAX_PROB;

-    }

-  }

-  // Segmentation data update

-  seg->update_data = vp9_rb_read_bit(rb);

-  if (seg->update_data) {

-    seg->abs_delta = vp9_rb_read_bit(rb);

-    vp9_clearall_segfeatures(seg);

-    for (i = 0; i < MAX_SEGMENTS; i++) {

-      for (j = 0; j < SEG_LVL_MAX; j++) {

-        int data = 0;

-        const int feature_enabled = vp9_rb_read_bit(rb);

-        if (feature_enabled) {

-          vp9_enable_segfeature(seg, i, j);

-          data = decode_unsigned_max(rb, vp9_seg_feature_data_max(j));

-          if (vp9_is_segfeature_signed(j))

-            data = vp9_rb_read_bit(rb) ? -data : data;

-        }

-        vp9_set_segdata(seg, i, j, data);

-      }

-    }

-  }

-}

-static void setup_loopfilter(struct loopfilter *lf,

-                             struct vp9_read_bit_buffer *rb) {

-  lf->filter_level = vp9_rb_read_literal(rb, 6);

-  lf->sharpness_level = vp9_rb_read_literal(rb, 3);

-  // Read in loop filter deltas applied at the MB level based on mode or ref

-  // frame.

-  lf->mode_ref_delta_update = 0;

-  lf->mode_ref_delta_enabled = vp9_rb_read_bit(rb);

-  if (lf->mode_ref_delta_enabled) {

-    lf->mode_ref_delta_update = vp9_rb_read_bit(rb);

-    if (lf->mode_ref_delta_update) {

-      int i;

-      for (i = 0; i < MAX_REF_LF_DELTAS; i++)

-        if (vp9_rb_read_bit(rb))

-          lf->ref_deltas[i] = vp9_rb_read_signed_literal(rb, 6);

-      for (i = 0; i < MAX_MODE_LF_DELTAS; i++)

-        if (vp9_rb_read_bit(rb))

-          lf->mode_deltas[i] = vp9_rb_read_signed_literal(rb, 6);

-    }

-  }

-}

-static int read_delta_q(struct vp9_read_bit_buffer *rb, int *delta_q) {

-  const int old = *delta_q;

-  *delta_q = vp9_rb_read_bit(rb) ? vp9_rb_read_signed_literal(rb, 4) : 0;

-  return old != *delta_q;

-}

-static void setup_quantization(VP9_COMMON *const cm, MACROBLOCKD *const xd,

-                               struct vp9_read_bit_buffer *rb) {

-  int update = 0;

-  cm->base_qindex = vp9_rb_read_literal(rb, QINDEX_BITS);

-  update |= read_delta_q(rb, &cm->y_dc_delta_q);

-  update |= read_delta_q(rb, &cm->uv_dc_delta_q);

-  update |= read_delta_q(rb, &cm->uv_ac_delta_q);

-  if (update)

-    vp9_init_dequantizer(cm);

-  xd->lossless = cm->base_qindex == 0 &&

-                 cm->y_dc_delta_q == 0 &&

-                 cm->uv_dc_delta_q == 0 &&

-                 cm->uv_ac_delta_q == 0;

-  xd->itxm_add = xd->lossless ? vp9_iwht4x4_add : vp9_idct4x4_add;

-}

-static INTERPOLATION_TYPE read_interp_filter_type(

-                              struct vp9_read_bit_buffer *rb) {

-  const INTERPOLATION_TYPE literal_to_type[] = { EIGHTTAP_SMOOTH,

-                                                 EIGHTTAP,

-                                                 EIGHTTAP_SHARP,

-                                                 BILINEAR };

-  return vp9_rb_read_bit(rb) ? SWITCHABLE

-                             : literal_to_type[vp9_rb_read_literal(rb, 2)];

-}

-static void read_frame_size(struct vp9_read_bit_buffer *rb,

-                            int *width, int *height) {

-  const int w = vp9_rb_read_literal(rb, 16) + 1;

-  const int h = vp9_rb_read_literal(rb, 16) + 1;

-  *width = w;

-  *height = h;

-}

-static void setup_display_size(VP9_COMMON *cm, struct vp9_read_bit_buffer *rb) {

-  cm->display_width = cm->width;

-  cm->display_height = cm->height;

-  if (vp9_rb_read_bit(rb))

-    read_frame_size(rb, &cm->display_width, &cm->display_height);

-}

-static void apply_frame_size(VP9D_COMP *pbi, int width, int height) {

-  VP9_COMMON *cm = &pbi->common;

-  if (cm->width != width || cm->height != height) {

-    // Change in frame size.

-    if (cm->width == 0 || cm->height == 0) {

-      // Assign new frame buffer on first call.

-      cm->new_fb_idx = NUM_YV12_BUFFERS - 1;

-      cm->fb_idx_ref_cnt[cm->new_fb_idx] = 1;

-    }

-    // TODO(agrange) Don't test width/height, check overall size.

-    if (width > cm->width || height > cm->height) {

-      // Rescale frame buffers only if they're not big enough already.

-      if (vp9_resize_frame_buffers(cm, width, height))

-        vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR,

-                           "Failed to allocate frame buffers");

-    }

-    cm->width = width;

-    cm->height = height;

-    vp9_update_frame_size(cm);

-  }

-  vp9_realloc_frame_buffer(get_frame_new_buffer(cm), cm->width, cm->height,

-                           cm->subsampling_x, cm->subsampling_y,

-                           VP9BORDERINPIXELS);

-}

-static void setup_frame_size(VP9D_COMP *pbi,

-                             struct vp9_read_bit_buffer *rb) {

-  int width, height;

-  read_frame_size(rb, &width, &height);

-  apply_frame_size(pbi, width, height);

-  setup_display_size(&pbi->common, rb);

-}

-static void setup_frame_size_with_refs(VP9D_COMP *pbi,

-                                       struct vp9_read_bit_buffer *rb) {

-  VP9_COMMON *const cm = &pbi->common;

-  int width, height;

-  int found = 0, i;

-  for (i = 0; i < ALLOWED_REFS_PER_FRAME; ++i) {

-    if (vp9_rb_read_bit(rb)) {

-      YV12_BUFFER_CONFIG *const cfg = get_frame_ref_buffer(cm, i);

-      width = cfg->y_crop_width;

-      height = cfg->y_crop_height;

-      found = 1;

-      break;

-    }

-  }

-  if (!found)

-    read_frame_size(rb, &width, &height);

-  if (!width || !height)

-    vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,

-                       "Referenced frame with invalid size");

-  apply_frame_size(pbi, width, height);

-  setup_display_size(cm, rb);

-}

-static void setup_tile_context(VP9D_COMP *const pbi, MACROBLOCKD *const xd,

-                               int tile_row, int tile_col) {

-  int i;

-  const int tile_cols = 1 << pbi->common.log2_tile_cols;

-  xd->mi_stream = pbi->mi_streams[tile_row * tile_cols + tile_col];

-  for (i = 0; i < MAX_MB_PLANE; ++i) {

-    xd->above_context[i] = pbi->above_context[i];

-  }

-  // see note in alloc_tile_storage().

-  xd->above_seg_context = pbi->above_seg_context;

-}

-static void decode_tile(VP9D_COMP *pbi, const TileInfo *const tile,

-                        vp9_reader *r) {

-  const int num_threads = pbi->oxcf.max_threads;

-  VP9_COMMON *const cm = &pbi->common;

-  int mi_row, mi_col;

-  MACROBLOCKD *xd = &pbi->mb;

-  if (pbi->do_loopfilter_inline) {

-    LFWorkerData *const lf_data = (LFWorkerData*)pbi->lf_worker.data1;

-    lf_data->frame_buffer = get_frame_new_buffer(cm);

-    lf_data->cm = cm;

-    lf_data->xd = pbi->mb;

-    lf_data->stop = 0;

-    lf_data->y_only = 0;

-    vp9_loop_filter_frame_init(cm, cm->lf.filter_level);

-  }

-  for (mi_row = tile->mi_row_start; mi_row < tile->mi_row_end;

-       mi_row += MI_BLOCK_SIZE) {

-    // For a SB there are 2 left contexts, each pertaining to a MB row within

-    vp9_zero(xd->left_context);

-    vp9_zero(xd->left_seg_context);

-    for (mi_col = tile->mi_col_start; mi_col < tile->mi_col_end;

-         mi_col += MI_BLOCK_SIZE) {

-      decode_modes_sb(cm, xd, tile, mi_row, mi_col, r, BLOCK_64X64,

-                      pbi->token_cache);

-    }

-    if (pbi->do_loopfilter_inline) {

-      const int lf_start = mi_row - MI_BLOCK_SIZE;

-      LFWorkerData *const lf_data = (LFWorkerData*)pbi->lf_worker.data1;

-      // delay the loopfilter by 1 macroblock row.

-      if (lf_start < 0) continue;

-      // decoding has completed: finish up the loop filter in this thread.

-      if (mi_row + MI_BLOCK_SIZE >= tile->mi_row_end) continue;

-      vp9_worker_sync(&pbi->lf_worker);

-      lf_data->start = lf_start;

-      lf_data->stop = mi_row;

-      if (num_threads > 1) {

-        vp9_worker_launch(&pbi->lf_worker);

-      } else {

-        vp9_worker_execute(&pbi->lf_worker);

-      }

-    }

-  }

-  if (pbi->do_loopfilter_inline) {

-    LFWorkerData *const lf_data = (LFWorkerData*)pbi->lf_worker.data1;

-    vp9_worker_sync(&pbi->lf_worker);

-    lf_data->start = lf_data->stop;

-    lf_data->stop = cm->mi_rows;

-    vp9_worker_execute(&pbi->lf_worker);

-  }

-}

-static void setup_tile_info(VP9_COMMON *cm, struct vp9_read_bit_buffer *rb) {

-  int min_log2_tile_cols, max_log2_tile_cols, max_ones;

-  vp9_get_tile_n_bits(cm->mi_cols, &min_log2_tile_cols, &max_log2_tile_cols);

-  // columns

-  max_ones = max_log2_tile_cols - min_log2_tile_cols;

-  cm->log2_tile_cols = min_log2_tile_cols;

-  while (max_ones-- && vp9_rb_read_bit(rb))

-    cm->log2_tile_cols++;

-  // rows

-  cm->log2_tile_rows = vp9_rb_read_bit(rb);

-  if (cm->log2_tile_rows)

-    cm->log2_tile_rows += vp9_rb_read_bit(rb);

-}

-// Reads the next tile returning its size and adjusting '*data' accordingly

-// based on 'is_last'.

-static size_t get_tile(const uint8_t *const data_end,

-                       int is_last,

-                       struct vpx_internal_error_info *error_info,

-                       const uint8_t **data) {

-  size_t size;

-  if (!is_last) {

-    if (!read_is_valid(*data, 4, data_end))

-      vpx_internal_error(error_info, VPX_CODEC_CORRUPT_FRAME,

-          "Truncated packet or corrupt tile length");

-    size = read_be32(*data);

-    *data += 4;

-  } else {

-    size = data_end - *data;

-  }

-  return size;

-}

-typedef struct TileBuffer {

-  const uint8_t *data;

-  size_t size;

-} TileBuffer;

-static const uint8_t *decode_tiles(VP9D_COMP *pbi, const uint8_t *data) {

-  VP9_COMMON *const cm = &pbi->common;

-  MACROBLOCKD *const xd = &pbi->mb;

-  const int aligned_cols = mi_cols_aligned_to_sb(cm->mi_cols);

-  const int tile_cols = 1 << cm->log2_tile_cols;

-  const int tile_rows = 1 << cm->log2_tile_rows;

-  TileBuffer tile_buffers[4][1 << 6];

-  int tile_row, tile_col;

-  const uint8_t *const data_end = pbi->source + pbi->source_sz;

-  const uint8_t *end = NULL;

-  vp9_reader r;

-  assert(tile_rows <= 4);

-  assert(tile_cols <= (1 << 6));

-  // Note: this memset assumes above_context[0], [1] and [2]

-  // are allocated as part of the same buffer.

-  vpx_memset(pbi->above_context[0], 0,

-             sizeof(*pbi->above_context[0]) * MAX_MB_PLANE * 2 * aligned_cols);

-  vpx_memset(pbi->above_seg_context, 0,

-             sizeof(*pbi->above_seg_context) * aligned_cols);

-  // Load tile data into tile_buffers

-  for (tile_row = 0; tile_row < tile_rows; ++tile_row) {

-    for (tile_col = 0; tile_col < tile_cols; ++tile_col) {

-      const int last_tile = tile_row == tile_rows - 1 &&

-                            tile_col == tile_cols - 1;

-      const size_t size = get_tile(data_end, last_tile, &cm->error, &data);

-      TileBuffer *const buf = &tile_buffers[tile_row][tile_col];

-      buf->data = data;

-      buf->size = size;

-      data += size;

-    }

-  }

-  // Decode tiles using data from tile_buffers

-  for (tile_row = 0; tile_row < tile_rows; ++tile_row) {

-    for (tile_col = 0; tile_col < tile_cols; ++tile_col) {

-      const int col = pbi->oxcf.inv_tile_order ? tile_cols - tile_col - 1

-                                               : tile_col;

-      const int last_tile = tile_row == tile_rows - 1 &&

-                                 col == tile_cols - 1;

-      const TileBuffer *const buf = &tile_buffers[tile_row][col];

-      TileInfo tile;

-      vp9_tile_init(&tile, cm, tile_row, col);

-      setup_token_decoder(buf->data, data_end, buf->size, &cm->error, &r);

-      setup_tile_context(pbi, xd, tile_row, col);

-      decode_tile(pbi, &tile, &r);

-      if (last_tile)

-        end = vp9_reader_find_end(&r);

-    }

-  }

-  return end;

-}

-static void setup_tile_macroblockd(TileWorkerData *const tile_data) {

-  MACROBLOCKD *xd = &tile_data->xd;

-  struct macroblockd_plane *const pd = xd->plane;

-  int i;

-  for (i = 0; i < MAX_MB_PLANE; ++i) {

-    pd[i].qcoeff  = tile_data->qcoeff[i];

-    pd[i].dqcoeff = tile_data->dqcoeff[i];

-    pd[i].eobs    = tile_data->eobs[i];

-    vpx_memset(xd->plane[i].dqcoeff, 0, 64 * 64 * sizeof(int16_t));

-  }

-}

-static int tile_worker_hook(void *arg1, void *arg2) {

-  TileWorkerData *const tile_data = (TileWorkerData*)arg1;

-  const TileInfo *const tile = (TileInfo*)arg2;

-  int mi_row, mi_col;

-  for (mi_row = tile->mi_row_start; mi_row < tile->mi_row_end;

-       mi_row += MI_BLOCK_SIZE) {

-    vp9_zero(tile_data->xd.left_context);

-    vp9_zero(tile_data->xd.left_seg_context);

-    for (mi_col = tile->mi_col_start; mi_col < tile->mi_col_end;

-         mi_col += MI_BLOCK_SIZE) {

-      decode_modes_sb(tile_data->cm, &tile_data->xd, tile,

-                      mi_row, mi_col, &tile_data->bit_reader, BLOCK_64X64,

-                      tile_data->token_cache);

-    }

-  }

-  return !tile_data->xd.corrupted;

-}

-static const uint8_t *decode_tiles_mt(VP9D_COMP *pbi, const uint8_t *data) {

-  VP9_COMMON *const cm = &pbi->common;

-  const uint8_t *const data_end = pbi->source + pbi->source_sz;

-  const int aligned_mi_cols = mi_cols_aligned_to_sb(cm->mi_cols);

-  const int tile_cols = 1 << cm->log2_tile_cols;

-  const int tile_rows = 1 << cm->log2_tile_rows;

-  const int num_workers = MIN(pbi->oxcf.max_threads & ~1, tile_cols);

-  int tile_col = 0;

-  assert(tile_rows == 1);

-  (void)tile_rows;

-  if (num_workers > pbi->num_tile_workers) {

-    int i;

-    CHECK_MEM_ERROR(cm, pbi->tile_workers,

-                    vpx_realloc(pbi->tile_workers,

-                                num_workers * sizeof(*pbi->tile_workers)));

-    for (i = pbi->num_tile_workers; i < num_workers; ++i) {

-      VP9Worker *const worker = &pbi->tile_workers[i];

-      ++pbi->num_tile_workers;

-      vp9_worker_init(worker);

-      worker->hook = (VP9WorkerHook)tile_worker_hook;

-      CHECK_MEM_ERROR(cm, worker->data1,

-                      vpx_memalign(32, sizeof(TileWorkerData)));

-      CHECK_MEM_ERROR(cm, worker->data2, vpx_malloc(sizeof(TileInfo)));

-      if (i < num_workers - 1 && !vp9_worker_reset(worker)) {

-        vpx_internal_error(&cm->error, VPX_CODEC_ERROR,

-                           "Tile decoder thread creation failed");

-      }

-    }

-  }

-  // Note: this memset assumes above_context[0], [1] and [2]

-  // are allocated as part of the same buffer.

-  vpx_memset(pbi->above_context[0], 0,

-             sizeof(*pbi->above_context[0]) * MAX_MB_PLANE *

-             2 * aligned_mi_cols);

-  vpx_memset(pbi->above_seg_context, 0,

-             sizeof(*pbi->above_seg_context) * aligned_mi_cols);

-  while (tile_col < tile_cols) {

-    int i;

-    for (i = 0; i < num_workers && tile_col < tile_cols; ++i) {

-      VP9Worker *const worker = &pbi->tile_workers[i];

-      TileWorkerData *const tile_data = (TileWorkerData*)worker->data1;

-      TileInfo *const tile = (TileInfo*)worker->data2;

-      const size_t size =

-          get_tile(data_end, tile_col == tile_cols - 1, &cm->error, &data);

-      tile_data->cm = cm;

-      tile_data->xd = pbi->mb;

-      tile_data->xd.corrupted = 0;

-      vp9_tile_init(tile, tile_data->cm, 0, tile_col);

-      setup_token_decoder(data, data_end, size, &cm->error,

-                          &tile_data->bit_reader);

-      setup_tile_context(pbi, &tile_data->xd, 0, tile_col);

-      setup_tile_macroblockd(tile_data);

-      worker->had_error = 0;

-      if (i == num_workers - 1 || tile_col == tile_cols - 1) {

-        vp9_worker_execute(worker);

-      } else {

-        vp9_worker_launch(worker);

-      }

-      data += size;

-      ++tile_col;

-    }

-    for (; i > 0; --i) {

-      VP9Worker *const worker = &pbi->tile_workers[i - 1];

-      pbi->mb.corrupted |= !vp9_worker_sync(worker);

-    }

-  }

-  {

-    const int final_worker = (tile_cols + num_workers - 1) % num_workers;

-    TileWorkerData *const tile_data =

-        (TileWorkerData*)pbi->tile_workers[final_worker].data1;

-    return vp9_reader_find_end(&tile_data->bit_reader);

-  }

-}

-static void check_sync_code(VP9_COMMON *cm, struct vp9_read_bit_buffer *rb) {

-  if (vp9_rb_read_literal(rb, 8) != VP9_SYNC_CODE_0 ||

-      vp9_rb_read_literal(rb, 8) != VP9_SYNC_CODE_1 ||

-      vp9_rb_read_literal(rb, 8) != VP9_SYNC_CODE_2) {

-    vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,

-                       "Invalid frame sync code");

-  }

-}

-static void error_handler(void *data, size_t bit_offset) {

-  VP9_COMMON *const cm = (VP9_COMMON *)data;

-  vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME, "Truncated packet");

-}

-#define RESERVED \

-  if (vp9_rb_read_bit(rb)) \

-      vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM, \

-                         "Reserved bit must be unset")

-static size_t read_uncompressed_header(VP9D_COMP *pbi,

-                                       struct vp9_read_bit_buffer *rb) {

-  VP9_COMMON *const cm = &pbi->common;

-  size_t sz;

-  int i;

-  cm->last_frame_type = cm->frame_type;

-  if (vp9_rb_read_literal(rb, 2) != VP9_FRAME_MARKER)

-      vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,

-                         "Invalid frame marker");

-  cm->version = vp9_rb_read_bit(rb);

-  RESERVED;

-  if (vp9_rb_read_bit(rb)) {

-    // show an existing frame directly

-    int frame_to_show = cm->ref_frame_map[vp9_rb_read_literal(rb, 3)];

-    ref_cnt_fb(cm->fb_idx_ref_cnt, &cm->new_fb_idx, frame_to_show);

-    pbi->refresh_frame_flags = 0;

-    cm->lf.filter_level = 0;

-    return 0;

-  }

-  cm->frame_type = (FRAME_TYPE) vp9_rb_read_bit(rb);

-  cm->show_frame = vp9_rb_read_bit(rb);

-  cm->error_resilient_mode = vp9_rb_read_bit(rb);

-  if (cm->frame_type == KEY_FRAME) {

-    check_sync_code(cm, rb);

-    cm->color_space = vp9_rb_read_literal(rb, 3);  // colorspace

-    if (cm->color_space != SRGB) {

-      vp9_rb_read_bit(rb);  // [16,235] (including xvycc) vs [0,255] range

-      if (cm->version == 1) {

-        cm->subsampling_x = vp9_rb_read_bit(rb);

-        cm->subsampling_y = vp9_rb_read_bit(rb);

-        vp9_rb_read_bit(rb);  // has extra plane

-      } else {

-        cm->subsampling_y = cm->subsampling_x = 1;

-      }

-    } else {

-      if (cm->version == 1) {

-        cm->subsampling_y = cm->subsampling_x = 0;

-        vp9_rb_read_bit(rb);  // has extra plane

-      } else {

-        vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,

-                           "RGB not supported in profile 0");

-      }

-    }

-    pbi->refresh_frame_flags = (1 << NUM_REF_FRAMES) - 1;

-    for (i = 0; i < ALLOWED_REFS_PER_FRAME; ++i)

-      cm->active_ref_idx[i] = cm->new_fb_idx;

-    setup_frame_size(pbi, rb);

-  } else {

-    cm->intra_only = cm->show_frame ? 0 : vp9_rb_read_bit(rb);

-    cm->reset_frame_context = cm->error_resilient_mode ?

-        0 : vp9_rb_read_literal(rb, 2);

-    if (cm->intra_only) {

-      check_sync_code(cm, rb);

-      pbi->refresh_frame_flags = vp9_rb_read_literal(rb, NUM_REF_FRAMES);

-      setup_frame_size(pbi, rb);

-    } else {

-      pbi->refresh_frame_flags = vp9_rb_read_literal(rb, NUM_REF_FRAMES);

-      for (i = 0; i < ALLOWED_REFS_PER_FRAME; ++i) {

-        const int ref = vp9_rb_read_literal(rb, NUM_REF_FRAMES_LOG2);

-        cm->active_ref_idx[i] = cm->ref_frame_map[ref];

-        cm->ref_frame_sign_bias[LAST_FRAME + i] = vp9_rb_read_bit(rb);

-      }

-      setup_frame_size_with_refs(pbi, rb);

-      cm->allow_high_precision_mv = vp9_rb_read_bit(rb);

-      cm->mcomp_filter_type = read_interp_filter_type(rb);

-      for (i = 0; i < ALLOWED_REFS_PER_FRAME; ++i)

-        vp9_setup_scale_factors(cm, i);

-    }

-  }

-  if (!cm->error_resilient_mode) {

-    cm->refresh_frame_context = vp9_rb_read_bit(rb);

-    cm->frame_parallel_decoding_mode = vp9_rb_read_bit(rb);

-  } else {

-    cm->refresh_frame_context = 0;

-    cm->frame_parallel_decoding_mode = 1;

-  }

-  // This flag will be overridden by the call to vp9_setup_past_independence

-  // below, forcing the use of context 0 for those frame types.

-  cm->frame_context_idx = vp9_rb_read_literal(rb, NUM_FRAME_CONTEXTS_LOG2);

-  if (frame_is_intra_only(cm) || cm->error_resilient_mode)

-    vp9_setup_past_independence(cm);

-  setup_loopfilter(&cm->lf, rb);

-  setup_quantization(cm, &pbi->mb, rb);

-  setup_segmentation(&cm->seg, rb);

-  setup_tile_info(cm, rb);

-  sz = vp9_rb_read_literal(rb, 16);

-  if (sz == 0)

-    vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,

-                       "Invalid header size");

-  return sz;

-}

-static int read_compressed_header(VP9D_COMP *pbi, const uint8_t *data,

-                                  size_t partition_size) {

-  VP9_COMMON *const cm = &pbi->common;

-  MACROBLOCKD *const xd = &pbi->mb;

-  FRAME_CONTEXT *const fc = &cm->fc;

-  vp9_reader r;

-  int k;

-  if (vp9_reader_init(&r, data, partition_size))

-    vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR,

-                       "Failed to allocate bool decoder 0");

-  cm->tx_mode = xd->lossless ? ONLY_4X4 : read_tx_mode(&r);

-  if (cm->tx_mode == TX_MODE_SELECT)

-    read_tx_probs(&fc->tx_probs, &r);

-  read_coef_probs(fc, cm->tx_mode, &r);

-  for (k = 0; k < MBSKIP_CONTEXTS; ++k)

-    vp9_diff_update_prob(&r, &fc->mbskip_probs[k]);

-  if (!frame_is_intra_only(cm)) {

-    nmv_context *const nmvc = &fc->nmvc;

-    int i, j;

-    read_inter_mode_probs(fc, &r);

-    if (cm->mcomp_filter_type == SWITCHABLE)

-      read_switchable_interp_probs(fc, &r);

-    for (i = 0; i < INTRA_INTER_CONTEXTS; i++)

-      vp9_diff_update_prob(&r, &fc->intra_inter_prob[i]);

-    read_comp_pred(cm, &r);

-    for (j = 0; j < BLOCK_SIZE_GROUPS; j++)

-      for (i = 0; i < INTRA_MODES - 1; ++i)

-        vp9_diff_update_prob(&r, &fc->y_mode_prob[j][i]);

-    for (j = 0; j < PARTITION_CONTEXTS; ++j)

-      for (i = 0; i < PARTITION_TYPES - 1; ++i)

-        vp9_diff_update_prob(&r, &fc->partition_prob[j][i]);

-    read_mv_probs(nmvc, cm->allow_high_precision_mv, &r);

-  }

-  return vp9_reader_has_error(&r);

-}

-void vp9_init_dequantizer(VP9_COMMON *cm) {

-  int q;

-  for (q = 0; q < QINDEX_RANGE; q++) {

-    cm->y_dequant[q][0] = vp9_dc_quant(q, cm->y_dc_delta_q);

-    cm->y_dequant[q][1] = vp9_ac_quant(q, 0);

-    cm->uv_dequant[q][0] = vp9_dc_quant(q, cm->uv_dc_delta_q);

-    cm->uv_dequant[q][1] = vp9_ac_quant(q, cm->uv_ac_delta_q);

-  }

-}

-#ifdef NDEBUG

-#define debug_check_frame_counts(cm) (void)0

-#else  // !NDEBUG

-// Counts should only be incremented when frame_parallel_decoding_mode and

-// error_resilient_mode are disabled.

-static void debug_check_frame_counts(const VP9_COMMON *const cm) {

-  FRAME_COUNTS zero_counts;

-  vp9_zero(zero_counts);

-  assert(cm->frame_parallel_decoding_mode || cm->error_resilient_mode);

-  assert(!memcmp(cm->counts.y_mode, zero_counts.y_mode,

-                 sizeof(cm->counts.y_mode)));

-  assert(!memcmp(cm->counts.uv_mode, zero_counts.uv_mode,

-                 sizeof(cm->counts.uv_mode)));

-  assert(!memcmp(cm->counts.partition, zero_counts.partition,

-                 sizeof(cm->counts.partition)));

-  assert(!memcmp(cm->counts.coef, zero_counts.coef,

-                 sizeof(cm->counts.coef)));

-  assert(!memcmp(cm->counts.eob_branch, zero_counts.eob_branch,

-                 sizeof(cm->counts.eob_branch)));

-  assert(!memcmp(cm->counts.switchable_interp, zero_counts.switchable_interp,

-                 sizeof(cm->counts.switchable_interp)));

-  assert(!memcmp(cm->counts.inter_mode, zero_counts.inter_mode,

-                 sizeof(cm->counts.inter_mode)));

-  assert(!memcmp(cm->counts.intra_inter, zero_counts.intra_inter,

-                 sizeof(cm->counts.intra_inter)));

-  assert(!memcmp(cm->counts.comp_inter, zero_counts.comp_inter,

-                 sizeof(cm->counts.comp_inter)));

-  assert(!memcmp(cm->counts.single_ref, zero_counts.single_ref,

-                 sizeof(cm->counts.single_ref)));

-  assert(!memcmp(cm->counts.comp_ref, zero_counts.comp_ref,

-                 sizeof(cm->counts.comp_ref)));

-  assert(!memcmp(&cm->counts.tx, &zero_counts.tx, sizeof(cm->counts.tx)));

-  assert(!memcmp(cm->counts.mbskip, zero_counts.mbskip,

-                 sizeof(cm->counts.mbskip)));

-  assert(!memcmp(&cm->counts.mv, &zero_counts.mv, sizeof(cm->counts.mv)));

-}

-#endif  // NDEBUG

-int vp9_decode_frame(VP9D_COMP *pbi, const uint8_t **p_data_end) {

-  int i;

-  VP9_COMMON *const cm = &pbi->common;

-  MACROBLOCKD *const xd = &pbi->mb;

-  const uint8_t *data = pbi->source;

-  const uint8_t *const data_end = pbi->source + pbi->source_sz;

-  struct vp9_read_bit_buffer rb = { data, data_end, 0, cm, error_handler };

-  const size_t first_partition_size = read_uncompressed_header(pbi, &rb);

-  const int keyframe = cm->frame_type == KEY_FRAME;

-  const int tile_rows = 1 << cm->log2_tile_rows;

-  const int tile_cols = 1 << cm->log2_tile_cols;

-  YV12_BUFFER_CONFIG *const new_fb = get_frame_new_buffer(cm);

-  if (!first_partition_size) {

-      // showing a frame directly

-      *p_data_end = data + 1;

-      return 0;

-  }

-  if (!pbi->decoded_key_frame && !keyframe)

-    return -1;

-  data += vp9_rb_bytes_read(&rb);

-  if (!read_is_valid(data, first_partition_size, data_end))

-    vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,

-                       "Truncated packet or corrupt header length");

-  pbi->do_loopfilter_inline =

-      (cm->log2_tile_rows | cm->log2_tile_cols) == 0 && cm->lf.filter_level;

-  if (pbi->do_loopfilter_inline && pbi->lf_worker.data1 == NULL) {

-    CHECK_MEM_ERROR(cm, pbi->lf_worker.data1, vpx_malloc(sizeof(LFWorkerData)));

-    pbi->lf_worker.hook = (VP9WorkerHook)vp9_loop_filter_worker;

-    if (pbi->oxcf.max_threads > 1 && !vp9_worker_reset(&pbi->lf_worker)) {

-      vpx_internal_error(&cm->error, VPX_CODEC_ERROR,

-                         "Loop filter thread creation failed");

-    }

-  }

-  alloc_tile_storage(pbi, tile_rows, tile_cols);

-  xd->mode_info_stride = cm->mode_info_stride;

-  set_prev_mi(cm);

-  setup_plane_dequants(cm, xd, cm->base_qindex);

-  setup_block_dptrs(xd, cm->subsampling_x, cm->subsampling_y);

-  cm->fc = cm->frame_contexts[cm->frame_context_idx];

-  vp9_zero(cm->counts);

-  for (i = 0; i < MAX_MB_PLANE; ++i)

-    vpx_memset(xd->plane[i].dqcoeff, 0, 64 * 64 * sizeof(int16_t));

-  xd->corrupted = 0;

-  new_fb->corrupted = read_compressed_header(pbi, data, first_partition_size);

-  // TODO(jzern): remove frame_parallel_decoding_mode restriction for

-  // single-frame tile decoding.

-  if (pbi->oxcf.max_threads > 1 && tile_rows == 1 && tile_cols > 1 &&

-      cm->frame_parallel_decoding_mode) {

-    *p_data_end = decode_tiles_mt(pbi, data + first_partition_size);

-  } else {

-    *p_data_end = decode_tiles(pbi, data + first_partition_size);

-  }

-  cm->last_width = cm->width;

-  cm->last_height = cm->height;

-  new_fb->corrupted |= xd->corrupted;

-  if (!pbi->decoded_key_frame) {

-    if (keyframe && !new_fb->corrupted)

-      pbi->decoded_key_frame = 1;

-    else

-      vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,

-                         "A stream must start with a complete key frame");

-  }

-  if (!cm->error_resilient_mode && !cm->frame_parallel_decoding_mode) {

-    vp9_adapt_coef_probs(cm);

-    if (!frame_is_intra_only(cm)) {

-      vp9_adapt_mode_probs(cm);

-      vp9_adapt_mv_probs(cm, cm->allow_high_precision_mv);

-    }

-  } else {

-    debug_check_frame_counts(cm);

-  }

-  if (cm->refresh_frame_context)

-    cm->frame_contexts[cm->frame_context_idx] = cm->fc;

-  return 0;

-}

--- a/vp9/decoder/vp9_decodframe.h

+++ /dev/null

@@ -1,21 +1,0 @@

-/*

- *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.

- *

- *  Use of this source code is governed by a BSD-style license

- *  that can be found in the LICENSE file in the root of the source

- *  tree. An additional intellectual property rights grant can be found

- *  in the file PATENTS.  All contributing project authors may

- *  be found in the AUTHORS file in the root of the source tree.

- */

-#ifndef VP9_DECODER_VP9_DECODFRAME_H_

-#define VP9_DECODER_VP9_DECODFRAME_H_

-struct VP9Common;

-struct VP9Decompressor;

-void vp9_init_dequantizer(struct VP9Common *cm);

-int vp9_decode_frame(struct VP9Decompressor *cpi, const uint8_t **p_data_end);

-#endif  // VP9_DECODER_VP9_DECODFRAME_H_

--- a/vp9/decoder/vp9_onyxd_if.c

+++ b/vp9/decoder/vp9_onyxd_if.c

@@ -25,7 +25,7 @@

 #include "vpx_scale/vpx_scale.h"

 #include "vp9/common/vp9_systemdependent.h"

 #include "vpx_ports/vpx_timer.h"

-#include "vp9/decoder/vp9_decodframe.h"

+#include "vp9/decoder/vp9_decodeframe.h"

 #include "vp9/decoder/vp9_detokenize.h"

 #include "./vpx_scale_rtcd.h"

--- a/vp9/vp9dx.mk

+++ b/vp9/vp9dx.mk

@@ -19,8 +19,8 @@

 VP9_DX_SRCS-yes += decoder/vp9_dboolhuff.c

 VP9_DX_SRCS-yes += decoder/vp9_decodemv.c

-VP9_DX_SRCS-yes += decoder/vp9_decodframe.c

-VP9_DX_SRCS-yes += decoder/vp9_decodframe.h

+VP9_DX_SRCS-yes += decoder/vp9_decodeframe.c

+VP9_DX_SRCS-yes += decoder/vp9_decodeframe.h

 VP9_DX_SRCS-yes += decoder/vp9_detokenize.c

 VP9_DX_SRCS-yes += decoder/vp9_dboolhuff.h

 VP9_DX_SRCS-yes += decoder/vp9_read_bit_buffer.h

--

⑨