shithub: libvpx

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Rework enc/dec mismatch detection

The previous enc/dec mismatch detection assumes the previously
reconstructed frame would always stay at frame buffer pool index
at 0. It could hence cause certain delay in enc/dec mismatch
detection when the immediate reconstruction frame is not yet
propagated to index 0 in the buffer map pool.

This change always keeps the latest decoded show frame buffer
index and directly gets the reconstructed frame from encoder and
decoder buffer pools to check for mismatch.

Change-Id: If53092cbc42ab78d55af5b83f12a489fc362f3ae

--- a/vp9/common/vp9_onyxc_int.h

+++ b/vp9/common/vp9_onyxc_int.h

@@ -128,6 +128,8 @@

   int new_fb_idx;

+  int cur_show_frame_fb_idx;

+

 #if CONFIG_VP9_POSTPROC

   YV12_BUFFER_CONFIG post_proc_buffer;

   YV12_BUFFER_CONFIG post_proc_buffer_int;

@@ -259,6 +261,12 @@

   int lf_row;

 } VP9_COMMON;

+

+static INLINE YV12_BUFFER_CONFIG *get_buf_frame(VP9_COMMON *cm, int index) {

+  if (index < 0 || index >= FRAME_BUFFERS) return NULL;

+  if (cm->error.error_code != VPX_CODEC_OK) return NULL;

+  return &cm->buffer_pool->frame_bufs[index].buf;

+}

 static INLINE YV12_BUFFER_CONFIG *get_ref_frame(VP9_COMMON *cm, int index) {

   if (index < 0 || index >= REF_FRAMES) return NULL;

--- a/vp9/decoder/vp9_decoder.c

+++ b/vp9/decoder/vp9_decoder.c

@@ -365,6 +365,8 @@

     if (cm->seg.enabled) vp9_swap_current_and_last_seg_map(cm);

   }

+  if (cm->show_frame) cm->cur_show_frame_fb_idx = cm->new_fb_idx;

+

   // Update progress in frame parallel decode.

   cm->last_width = cm->width;

   cm->last_height = cm->height;

--- a/vp9/encoder/vp9_encoder.c

+++ b/vp9/encoder/vp9_encoder.c

@@ -6280,6 +6280,8 @@

   }

 #endif  // CONFIG_REALTIME_ONLY

+  if (cm->show_frame) cm->cur_show_frame_fb_idx = cm->new_fb_idx;

+

   if (cm->refresh_frame_context)

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

--- a/vp9/vp9_cx_iface.c

+++ b/vp9/vp9_cx_iface.c

@@ -1317,9 +1317,9 @@

   vp9_ref_frame_t *const frame = va_arg(args, vp9_ref_frame_t *);

   if (frame != NULL) {

-    YV12_BUFFER_CONFIG *fb = get_ref_frame(&ctx->cpi->common, frame->idx);

+    const int fb_idx = ctx->cpi->common.cur_show_frame_fb_idx;

+    YV12_BUFFER_CONFIG *fb = get_buf_frame(&ctx->cpi->common, fb_idx);

     if (fb == NULL) return VPX_CODEC_ERROR;

-

     yuvconfig2image(&frame->img, fb, NULL);

     return VPX_CODEC_OK;

   }

--- a/vp9/vp9_dx_iface.c

+++ b/vp9/vp9_dx_iface.c

@@ -471,8 +471,8 @@

   vp9_ref_frame_t *data = va_arg(args, vp9_ref_frame_t *);

   if (data) {

-    YV12_BUFFER_CONFIG *fb;

-    fb = get_ref_frame(&ctx->pbi->common, data->idx);

+    const int fb_idx = ctx->pbi->common.cur_show_frame_fb_idx;

+    YV12_BUFFER_CONFIG *fb = get_buf_frame(&ctx->pbi->common, fb_idx);

     if (fb == NULL) return VPX_CODEC_ERROR;

     yuvconfig2image(&data->img, fb, NULL);

     return VPX_CODEC_OK;

-- 

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