int main(int argc, char **argv)
{
AVFormatContext* pCtx = 0;
AVCodecContext *pCodecCtx = 0;
AVCodec *pCodec = 0;
AVPacket packet;
AVFrame *pFrame = 0;
FILE *fpo1 = NULL;
FILE *fpo2 = NULL;
int nframe;
int err;
int got_picture = -1;
int picwidth, picheight, linesize;
unsigned char *pBuf;
int i;
int64_t timestamp;
struct options opt;
int usefo = 0;
struct audio_dsp dsp;
int dusecs;
float usecs1 = 0;
float usecs2 = 0;
struct timeval elapsed1, elapsed2;
int decoded = 0;
//taoanran add +++++++++
int ret = -1;
int videoStream = -1; //video streamID
// ----------------------
int flags = SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER;
#if 0
if (SDL_Init (flags)) {
fprintf(stderr, "Could not initialize SDL - %s\n", SDL_GetError());
fprintf(stderr, "(Did you set the DISPLAY variable?)\n");
exit(1);
}
#endif
av_register_all();
av_log_set_callback(log_callback);
av_log_set_level(50);
if (Myparse_option(&opt, argc, argv) < 0 || (strlen(opt.finput) == 0))
{
Myshow_help(argv[0]);
return 0;
}
err = avformat_open_input(&pCtx, opt.finput, 0, 0);
if (err < 0)
{
printf("\n->(avformat_open_input)\tERROR:\t%d\n", err);
goto fail;
}
printf("=========================\n");
err = avformat_find_stream_info(pCtx, 0);
if (err < 0)
{
printf("\n->(avformat_find_stream_info)\tERROR:\t%d\n", err);
goto fail;
}
av_dump_format(pCtx, 0, opt.finput, 0);
// check the video stream
videoStream = find_video_stream(pCtx);
if (videoStream < 0)
{
printf("there is not audio stream !!!!!!! \n");
return -1;
}
pCodecCtx = pCtx->streams[videoStream]->codec;
pCodec = avcodec_find_decoder(pCodecCtx->codec_id);//find the video decoder
if (!pCodec)
{
printf("\ncan't find the audio decoder!\n");
goto fail;
}
pFrame = avcodec_alloc_frame();
//open videDecoder
ret = avcodec_open2(pCodecCtx, pCodec, 0);
if (ret < 0)
{
printf("avcodec_open2 error \n");
return -1;
}
#if 0
//only for audio
pFrame->nb_samples = pCodecCtx->frame_size;
pFrame->format = pCodecCtx->sample_fmt;
pFrame->channel_layout = pCodecCtx->channel_layout;
#endif
#if 0
//set the param of SDL
SDL_AudioSpec wanted_spec, spec;
wanted_spec.freq = pCodecCtx->sample_rate;
wanted_spec.format = AUDIO_S16SYS;
wanted_spec.channels = pCodecCtx->channels;
wanted_spec.silence = 0;
wanted_spec.samples = SDL_AUDIO_BUFFER_SIZE;
wanted_spec.callback = audio_callback;//audio_callback;
wanted_spec.userdata = pCodecCtx;;//pCodecCtx;
if(SDL_OpenAudio(&wanted_spec, &spec) < 0)
{
fprintf(stderr, "SDL_OpenAudio: %s/n", SDL_GetError());
return -1;
}
#endif
printf(" bit_rate = %d \r\n", pCodecCtx->bit_rate);
printf(" sample_rate = %d \r\n", pCodecCtx->sample_rate);
printf(" channels = %d \r\n", pCodecCtx->channels);
printf(" code_name = %s \r\n", pCodecCtx->codec->name);
char *data = NULL;
while(av_read_frame(pCtx, &packet) >= 0)
{
//found the audio frame !!!
if (packet.stream_index == videoStream)
{
int got;
int i;
avcodec_decode_video2(pCodecCtx, pFrame,&got_picture,&packet);
data = (char *)malloc(pFrame->width * pFrame->height);
memset(data,0,pFrame->width * pFrame->height);
printf("pFrame->width = %d\n", pFrame->width);
printf("pFrame->height = %d\n", pFrame->height);
printf("pFrame->linesize[0] = %d\n", pFrame->linesize[0]);
printf("pFrame->linesize[1] = %d\n", pFrame->linesize[1]);
printf("pFrame->linesize[2] = %d\n", pFrame->linesize[2]);
//catch the YUV420P data
saveYUV420P(pFrame->data[0], pFrame->linesize[0], pCodecCtx->width, pCodecCtx->height); //Y: 4
saveYUV420P(pFrame->data[1], pFrame->linesize[1], pCodecCtx->width/2, pCodecCtx->height/2); //U : 1
saveYUV420P(pFrame->data[2], pFrame->linesize[2], pCodecCtx->width/2, pCodecCtx->height/2); //V : 1
}
}
return 0;
#if 0
if (!opt.nodec)
{
pCodecCtx = pCtx->streams[opt.streamId]->codec;
if (opt.thread_count <= 16 && opt.thread_count > 0 )
{
pCodecCtx->thread_count = opt.thread_count;
pCodecCtx->thread_type = FF_THREAD_FRAME;
}
pCodec = avcodec_find_decoder(pCodecCtx->codec_id);
if (!pCodec)
{
printf("\n->不能找到编解码器!\n");
goto fail;
}
err = avcodec_open2(pCodecCtx, pCodec, 0);
if (err < 0)
{
printf("\n->(avcodec_open)\tERROR:\t%d\n", err);
goto fail;
}
pFrame = avcodec_alloc_frame();
if (opt.bplay)
{
dsp.audio_fd = open(OSS_DEVICE, O_WRONLY);
if (dsp.audio_fd == -1)
{
printf("\n-> 无法打开音频设备\n");
goto fail;
}
dsp.channels = pCodecCtx->channels;
dsp.speed = pCodecCtx->sample_rate;
dsp.format = map_formats(pCodecCtx->sample_fmt);
if (set_audio(&dsp) < 0)
{
printf("\n-> 不能设置音频设备\n");
goto fail;
}
}
}
nframe = 0;
printf("=========================444444\n");
while(nframe < opt.frames || opt.frames == -1)
{
gettimeofday(&elapsed1, NULL);
err = av_read_frame(pCtx, &packet);
if (err < 0)
{
printf("\n->(av_read_frame)\tERROR:\t%d\n", err);
break;
}
gettimeofday(&elapsed2, NULL);
dusecs = (elapsed2.tv_sec - elapsed1.tv_sec)*1000000 + (elapsed2.tv_usec - elapsed1.tv_usec);
usecs2 += dusecs;
timestamp = av_rescale_q(packet.dts, pCtx->streams[packet.stream_index]->time_base, (AVRational){1, AV_TIME_BASE});
printf("\nFrame No ] stream#%d\tsize mB, timestamp:%6lld, dts:%6lld, pts:%6lld, ", nframe++, packet.stream_index, packet.size,
timestamp, packet.dts, packet.pts);
if (packet.stream_index == opt.streamId)
{
#if 0
for (i = 0; i < 16; i++)
{
if (i == 0) printf("\n pktdata: ");
printf("%2x ", packet.data[i]);
}
printf("\n");
#endif
if (usefo)
{
fwrite(packet.data, packet.size, 1, fpo1);
fflush(fpo1);
}
if (pCtx->streams[opt.streamId]->codec->codec_type == AVMEDIA_TYPE_VIDEO && !opt.nodec)
{
picheight = pCtx->streams[opt.streamId]->codec->height;
picwidth = pCtx->streams[opt.streamId]->codec->width;
gettimeofday(&elapsed1, NULL);
avcodec_decode_video2(pCodecCtx, pFrame, &got_picture, &packet);
decoded++;
gettimeofday(&elapsed2, NULL);
dusecs = (elapsed2.tv_sec - elapsed1.tv_sec)*1000000 + (elapsed2.tv_usec - elapsed1.tv_usec);
usecs1 += dusecs;
if (got_picture)
{
printf("[Video: type %d, ref %d, pts %lld, pkt_pts %lld, pkt_dts %lld]",
pFrame->pict_type, pFrame->reference, pFrame->pts, pFrame->pkt_pts, pFrame->pkt_dts);
if (pCtx->streams[opt.streamId]->codec->pix_fmt == PIX_FMT_YUV420P)
{
if (usefo)
{
linesize = pFrame->linesize[0];
pBuf = pFrame->data[0];
for (i = 0; i < picheight; i++)
{
fwrite(pBuf, picwidth, 1, fpo2);
pBuf += linesize;
}
linesize = pFrame->linesize[1];
pBuf = pFrame->data[1];
for (i = 0; i < picheight/2; i++)
{
fwrite(pBuf, picwidth/2, 1, fpo2);
pBuf += linesize;
}
linesize = pFrame->linesize[2];
pBuf = pFrame->data[2];
for (i = 0; i < picheight/2; i++)
{
fwrite(pBuf, picwidth/2, 1, fpo2);
pBuf += linesize;
}
fflush(fpo2);
}
if (opt.bplay)
{
}
}
}
av_free_packet(&packet);
}
else if (pCtx->streams[opt.streamId]->codec->codec_type == AVMEDIA_TYPE_AUDIO && !opt.nodec)
{
int got;
gettimeofday(&elapsed1, NULL);
avcodec_decode_audio4(pCodecCtx, pFrame, &got, &packet);
decoded++;
gettimeofday(&elapsed2, NULL);
dusecs = (elapsed2.tv_sec - elapsed1.tv_sec)*1000000 + (elapsed2.tv_usec - elapsed1.tv_usec);
usecs1 += dusecs;
if (got)
{
printf("[Audio: ]B raw data, decoding time: %d]", pFrame->linesize[0], dusecs);
if (usefo)
{
fwrite(pFrame->data[0], pFrame->linesize[0], 1, fpo2);
fflush(fpo2);
}
if (opt.bplay)
{
play_pcm(&dsp, pFrame->data[0], pFrame->linesize[0]);
}
}
}
}
}
if (!opt.nodec && pCodecCtx)
{
avcodec_close(pCodecCtx);
}
printf("\n%d 帧解析, average %.2f us per frame\n", nframe, usecs2/nframe);
printf("%d 帧解码，平均 %.2f 我们每帧\n", decoded, usecs1/decoded);
#endif
fail:
if (pCtx)
{
avformat_close_input(&pCtx);
}
return 0;
}
struct VideoFile*
video_file_open(const char* filename)
{
struct VideoFile* video_file = NULL;
return_if(NULL == filename, NULL);
video_file = (struct VideoFile*)malloc(sizeof(struct VideoFile));
if (video_file)
{
memset(video_file, 0, sizeof(struct VideoFile));
if (avformat_open_input(&(video_file->format_ctx), filename, NULL, NULL) == 0)
{
if (avformat_find_stream_info(video_file->format_ctx, NULL) >= 0)
{
int idx;
/* find video stream */
idx = video_file->video_stream_idx =
find_video_stream(video_file->format_ctx);
if (idx >= 0)
{
video_file->video_stream =
video_file->format_ctx->streams[idx];
video_file->codec_ctx =
video_file->format_ctx->streams[idx]->codec;
video_file->codec = create_codec(video_file->codec_ctx);
if (video_file->codec)
{
/*
* create software scaler context for colorspace
* conversion
*/
video_file->scale_ctx =
make_scale_context(video_file->codec_ctx);
if (video_file->scale_ctx)
{
video_file->width =
video_file->codec_ctx->width;
video_file->height =
video_file->codec_ctx->height;
video_file->frame = avcodec_alloc_frame();
if (video_file->frame)
{
video_file->frame_rgb = avcodec_alloc_frame();
if (video_file->frame_rgb)
{
int bytes = avpicture_get_size(
PIX_FMT_RGB24,
video_file->width,
video_file->height);
video_file->rgb_buffer =
(uint8_t *)av_malloc(bytes * sizeof(uint8_t));
if (video_file->rgb_buffer)
{
avpicture_fill(
(AVPicture *)video_file->frame_rgb,
video_file->rgb_buffer,
PIX_FMT_RGB24,
video_file->width,
video_file->height);
return video_file;
}
}
}
}
}
}
}
}
video_file_close(video_file);
video_file = NULL;
}
return video_file;
}
