/* * Copyright (c) 2015 Matthieu Bouron <matthieu.bouron stupeflix.com> * * 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. */ #include <stdio.h> #include "libavformat/avformat.h" #include "libavutil/pixdesc.h" #include "libavcodec/internal.h" #include "libavutil/avassert.h" #include "libavutil/opt.h" static int try_decode_video_frame(AVCodecContext *codec_ctx, AVPacket *pkt, int decode) { int ret = 0; int got_frame = 0; AVFrame *frame = NULL; int skip_frame = codec_ctx->skip_frame; if (!avcodec_is_open(codec_ctx)) { const AVCodec *codec = avcodec_find_decoder(codec_ctx->codec_id); ret = avcodec_open2(codec_ctx, codec, NULL); if (ret < 0) { av_log(codec_ctx, AV_LOG_ERROR, "Failed to open codec\n"); goto end; } } frame = av_frame_alloc(); if (!frame) { av_log(NULL, AV_LOG_ERROR, "Failed to allocate frame\n"); goto end; } if (!decode && avpriv_codec_get_cap_skip_frame_fill_param(codec_ctx->codec)) { codec_ctx->skip_frame = AVDISCARD_ALL; } do { ret = avcodec_decode_video2(codec_ctx, frame, &got_frame, pkt); av_assert0(decode || (!decode && !got_frame)); if (ret < 0) break; pkt->data += ret; pkt->size -= ret; if (got_frame) { break; } } while (pkt->size > 0); end: codec_ctx->skip_frame = skip_frame; av_frame_free(&frame); return ret; } static int find_video_stream_info(AVFormatContext *fmt_ctx, int decode) { int ret = 0; int i, done = 0; AVPacket pkt; av_init_packet(&pkt); while (!done) { AVCodecContext *codec_ctx = NULL; AVStream *st; if ((ret = av_read_frame(fmt_ctx, &pkt)) < 0) { av_log(fmt_ctx, AV_LOG_ERROR, "Failed to read frame\n"); goto end; } st = fmt_ctx->streams[pkt.stream_index]; codec_ctx = st->codec; /* Writing to AVStream.codec_info_nb_frames must not be done by * user applications. It is done here for testing purposing as * find_video_stream_info tries to mimic avformat_find_stream_info * which writes to this field. * */ if (codec_ctx->codec_type != AVMEDIA_TYPE_VIDEO || st->codec_info_nb_frames++ > 0) { av_packet_unref(&pkt); continue; } ret = try_decode_video_frame(codec_ctx, &pkt, decode); if (ret < 0) { av_log(fmt_ctx, AV_LOG_ERROR, "Failed to decode video frame\n"); goto end; } av_packet_unref(&pkt); /* check if all video streams have demuxed a packet */ done = 1; for (i = 0; i < fmt_ctx->nb_streams; i++) { st = fmt_ctx->streams[i]; codec_ctx = st->codec; if (codec_ctx->codec_type != AVMEDIA_TYPE_VIDEO) continue; done &= st->codec_info_nb_frames > 0; } } end: av_packet_unref(&pkt); /* close all codecs opened in try_decode_video_frame */ for (i = 0; i < fmt_ctx->nb_streams; i++) { AVStream *st = fmt_ctx->streams[i]; avcodec_close(st->codec); } return ret < 0; } static void dump_video_streams(const AVFormatContext *fmt_ctx, int decode) { int i; for (i = 0; i < fmt_ctx->nb_streams; i++) { const AVOption *opt = NULL; const AVStream *st = fmt_ctx->streams[i]; AVCodecContext *codec_ctx = st->codec; printf("stream=%d, decode=%d\n", i, decode); while (opt = av_opt_next(codec_ctx, opt)) { uint8_t *str; if (opt->type == AV_OPT_TYPE_CONST) continue; if (!strcmp(opt->name, "frame_number")) continue; if (av_opt_get(codec_ctx, opt->name, 0, &str) >= 0) { printf(" %s=%s\n", opt->name, str); av_free(str); } } } } static int open_and_probe_video_streams(AVFormatContext **fmt_ctx, const char *filename, int decode) { int ret = 0; ret = avformat_open_input(fmt_ctx, filename, NULL, NULL); if (ret < 0) { av_log(NULL, AV_LOG_ERROR, "Failed to open input '%s'", filename); goto end; } ret = find_video_stream_info(*fmt_ctx, decode); if (ret < 0) { goto end; } dump_video_streams(*fmt_ctx, decode); end: return ret; } static int check_video_streams(const AVFormatContext *fmt_ctx1, const AVFormatContext *fmt_ctx2) { int i; int ret = 0; av_assert0(fmt_ctx1->nb_streams == fmt_ctx2->nb_streams); for (i = 0; i < fmt_ctx1->nb_streams; i++) { const AVOption *opt = NULL; const AVStream *st1 = fmt_ctx1->streams[i]; const AVStream *st2 = fmt_ctx2->streams[i]; AVCodecContext *codec_ctx1 = st1->codec; AVCodecContext *codec_ctx2 = st2->codec; if (codec_ctx1->codec_type != AVMEDIA_TYPE_VIDEO) continue; while (opt = av_opt_next(codec_ctx1, opt)) { uint8_t *str1 = NULL, *str2 = NULL; if (opt->type == AV_OPT_TYPE_CONST) continue; if (!strcmp(opt->name, "frame_number")) continue; av_assert0(av_opt_get(codec_ctx1, opt->name, 0, &str1) >= 0); av_assert0(av_opt_get(codec_ctx2, opt->name, 0, &str2) >= 0); if (strcmp(str1, str2)) { av_log(NULL, AV_LOG_ERROR, "Field %s differs: %s %s", opt->name, str1, str2); ret = AVERROR(EINVAL); } av_free(str1); av_free(str2); } } return ret; } int main(int argc, char* argv[]) { int ret = 0; AVFormatContext *fmt_ctx = NULL; AVFormatContext *fmt_ctx_no_decode = NULL; if (argc < 2) { av_log(NULL, AV_LOG_ERROR, "Usage: %s <input>\n", argv[0]); return -1; } if ((ret = open_and_probe_video_streams(&fmt_ctx_no_decode, argv[1], 0)) < 0) { av_log(NULL, AV_LOG_ERROR, "Failed to probe '%s' without frame decoding\n", argv[1]); goto end; } if ((ret = open_and_probe_video_streams(&fmt_ctx, argv[1], 1)) < 0) { av_log(NULL, AV_LOG_ERROR, "Failed to probe '%s' with frame decoding\n", argv[1]); goto end; } ret = check_video_streams(fmt_ctx, fmt_ctx_no_decode); end: avformat_close_input(&fmt_ctx); avformat_close_input(&fmt_ctx_no_decode); return ret; }