ref: 16d4f15782fa708769ac1838ea7b9f7a7d800503
dir: /examples/vp9_lossless_encoder.c/
/* * Copyright (c) 2014 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 <stdio.h> #include <stdlib.h> #include <string.h> #include "vpx/vpx_encoder.h" #include "vpx/vp8cx.h" #include "vp9/common/vp9_common.h" #include "../tools_common.h" #include "../video_writer.h" static const char *exec_name; void usage_exit(void) { fprintf(stderr, "vp9_lossless_encoder: Example demonstrating VP9 lossless " "encoding feature. Supports raw input only.\n"); fprintf(stderr, "Usage: %s <width> <height> <infile> <outfile>\n", exec_name); exit(EXIT_FAILURE); } static int encode_frame(vpx_codec_ctx_t *codec, vpx_image_t *img, int frame_index, int flags, VpxVideoWriter *writer) { int got_pkts = 0; vpx_codec_iter_t iter = NULL; const vpx_codec_cx_pkt_t *pkt = NULL; const vpx_codec_err_t res = vpx_codec_encode(codec, img, frame_index, 1, flags, VPX_DL_GOOD_QUALITY); if (res != VPX_CODEC_OK) die_codec(codec, "Failed to encode frame"); while ((pkt = vpx_codec_get_cx_data(codec, &iter)) != NULL) { got_pkts = 1; if (pkt->kind == VPX_CODEC_CX_FRAME_PKT) { const int keyframe = (pkt->data.frame.flags & VPX_FRAME_IS_KEY) != 0; if (!vpx_video_writer_write_frame(writer, pkt->data.frame.buf, pkt->data.frame.sz, pkt->data.frame.pts)) { die_codec(codec, "Failed to write compressed frame"); } printf(keyframe ? "K" : "."); fflush(stdout); } } return got_pkts; } int main(int argc, char **argv) { FILE *infile = NULL; vpx_codec_ctx_t codec; vpx_codec_enc_cfg_t cfg; int frame_count = 0; vpx_image_t raw; vpx_codec_err_t res; VpxVideoInfo info; VpxVideoWriter *writer = NULL; const VpxInterface *encoder = NULL; const int fps = 30; vp9_zero(info); exec_name = argv[0]; if (argc < 5) die("Invalid number of arguments"); encoder = get_vpx_encoder_by_name("vp9"); if (!encoder) die("Unsupported codec."); info.codec_fourcc = encoder->fourcc; info.frame_width = (int)strtol(argv[1], NULL, 0); info.frame_height = (int)strtol(argv[2], NULL, 0); info.time_base.numerator = 1; info.time_base.denominator = fps; if (info.frame_width <= 0 || info.frame_height <= 0 || (info.frame_width % 2) != 0 || (info.frame_height % 2) != 0) { die("Invalid frame size: %dx%d", info.frame_width, info.frame_height); } if (!vpx_img_alloc(&raw, VPX_IMG_FMT_I420, info.frame_width, info.frame_height, 1)) { die("Failed to allocate image."); } printf("Using %s\n", vpx_codec_iface_name(encoder->codec_interface())); res = vpx_codec_enc_config_default(encoder->codec_interface(), &cfg, 0); if (res) die_codec(&codec, "Failed to get default codec config."); cfg.g_w = info.frame_width; cfg.g_h = info.frame_height; cfg.g_timebase.num = info.time_base.numerator; cfg.g_timebase.den = info.time_base.denominator; writer = vpx_video_writer_open(argv[4], kContainerIVF, &info); if (!writer) die("Failed to open %s for writing.", argv[4]); if (!(infile = fopen(argv[3], "rb"))) die("Failed to open %s for reading.", argv[3]); if (vpx_codec_enc_init(&codec, encoder->codec_interface(), &cfg, 0)) die_codec(&codec, "Failed to initialize encoder"); if (vpx_codec_control_(&codec, VP9E_SET_LOSSLESS, 1)) die_codec(&codec, "Failed to use lossless mode"); // Encode frames. while (vpx_img_read(&raw, infile)) { encode_frame(&codec, &raw, frame_count++, 0, writer); } // Flush encoder. while (encode_frame(&codec, NULL, -1, 0, writer)) { } printf("\n"); fclose(infile); printf("Processed %d frames.\n", frame_count); vpx_img_free(&raw); if (vpx_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec."); vpx_video_writer_close(writer); return EXIT_SUCCESS; }