| /* |
| * Copyright (c) 2015 Ludmila Glinskih |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| |
| /** |
| * H264 codec test. |
| */ |
| |
| #include "libavutil/adler32.h" |
| #include "libavcodec/avcodec.h" |
| #include "libavformat/avformat.h" |
| #include "libavutil/imgutils.h" |
| #include "libavutil/timestamp.h" |
| |
| static int video_decode_example(const char *input_filename) |
| { |
| AVCodec *codec = NULL; |
| AVCodecContext *ctx= NULL; |
| AVCodecParameters *origin_par = NULL; |
| AVFrame *fr = NULL; |
| uint8_t *byte_buffer = NULL; |
| AVPacket pkt; |
| AVFormatContext *fmt_ctx = NULL; |
| int number_of_written_bytes; |
| int video_stream; |
| int got_frame = 0; |
| int byte_buffer_size; |
| int i = 0; |
| int result; |
| int end_of_stream = 0; |
| |
| result = avformat_open_input(&fmt_ctx, input_filename, NULL, NULL); |
| if (result < 0) { |
| av_log(NULL, AV_LOG_ERROR, "Can't open file\n"); |
| return result; |
| } |
| |
| result = avformat_find_stream_info(fmt_ctx, NULL); |
| if (result < 0) { |
| av_log(NULL, AV_LOG_ERROR, "Can't get stream info\n"); |
| return result; |
| } |
| |
| video_stream = av_find_best_stream(fmt_ctx, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0); |
| if (video_stream < 0) { |
| av_log(NULL, AV_LOG_ERROR, "Can't find video stream in input file\n"); |
| return -1; |
| } |
| |
| origin_par = fmt_ctx->streams[video_stream]->codecpar; |
| |
| codec = avcodec_find_decoder(origin_par->codec_id); |
| if (!codec) { |
| av_log(NULL, AV_LOG_ERROR, "Can't find decoder\n"); |
| return -1; |
| } |
| |
| ctx = avcodec_alloc_context3(codec); |
| if (!ctx) { |
| av_log(NULL, AV_LOG_ERROR, "Can't allocate decoder context\n"); |
| return AVERROR(ENOMEM); |
| } |
| |
| result = avcodec_parameters_to_context(ctx, origin_par); |
| if (result) { |
| av_log(NULL, AV_LOG_ERROR, "Can't copy decoder context\n"); |
| return result; |
| } |
| |
| result = avcodec_open2(ctx, codec, NULL); |
| if (result < 0) { |
| av_log(ctx, AV_LOG_ERROR, "Can't open decoder\n"); |
| return result; |
| } |
| |
| fr = av_frame_alloc(); |
| if (!fr) { |
| av_log(NULL, AV_LOG_ERROR, "Can't allocate frame\n"); |
| return AVERROR(ENOMEM); |
| } |
| |
| byte_buffer_size = av_image_get_buffer_size(ctx->pix_fmt, ctx->width, ctx->height, 16); |
| byte_buffer = av_malloc(byte_buffer_size); |
| if (!byte_buffer) { |
| av_log(NULL, AV_LOG_ERROR, "Can't allocate buffer\n"); |
| return AVERROR(ENOMEM); |
| } |
| |
| printf("#tb %d: %d/%d\n", video_stream, fmt_ctx->streams[video_stream]->time_base.num, fmt_ctx->streams[video_stream]->time_base.den); |
| i = 0; |
| av_init_packet(&pkt); |
| do { |
| if (!end_of_stream) |
| if (av_read_frame(fmt_ctx, &pkt) < 0) |
| end_of_stream = 1; |
| if (end_of_stream) { |
| pkt.data = NULL; |
| pkt.size = 0; |
| } |
| if (pkt.stream_index == video_stream || end_of_stream) { |
| got_frame = 0; |
| if (pkt.pts == AV_NOPTS_VALUE) |
| pkt.pts = pkt.dts = i; |
| result = avcodec_decode_video2(ctx, fr, &got_frame, &pkt); |
| if (result < 0) { |
| av_log(NULL, AV_LOG_ERROR, "Error decoding frame\n"); |
| return result; |
| } |
| if (got_frame) { |
| number_of_written_bytes = av_image_copy_to_buffer(byte_buffer, byte_buffer_size, |
| (const uint8_t* const *)fr->data, (const int*) fr->linesize, |
| ctx->pix_fmt, ctx->width, ctx->height, 1); |
| if (number_of_written_bytes < 0) { |
| av_log(NULL, AV_LOG_ERROR, "Can't copy image to buffer\n"); |
| return number_of_written_bytes; |
| } |
| printf("%d, %s, %s, %8"PRId64", %8d, 0x%08lx\n", video_stream, |
| av_ts2str(fr->pts), av_ts2str(fr->pkt_dts), fr->pkt_duration, |
| number_of_written_bytes, av_adler32_update(0, (const uint8_t*)byte_buffer, number_of_written_bytes)); |
| } |
| av_packet_unref(&pkt); |
| av_init_packet(&pkt); |
| } |
| i++; |
| } while (!end_of_stream || got_frame); |
| |
| av_packet_unref(&pkt); |
| av_frame_free(&fr); |
| avformat_close_input(&fmt_ctx); |
| avcodec_free_context(&ctx); |
| av_freep(&byte_buffer); |
| return 0; |
| } |
| |
| int main(int argc, char **argv) |
| { |
| if (argc < 2) |
| { |
| av_log(NULL, AV_LOG_ERROR, "Incorrect input\n"); |
| return 1; |
| } |
| |
| if (video_decode_example(argv[1]) != 0) |
| return 1; |
| |
| return 0; |
| } |