void openFile(StreamPtr stream, IAudioDevicePtr audioDevice)
{
FlogI("Trying to load file: " << stream->GetPath());
int ret;
this->stream = stream;
this->audioDevice = audioDevice;
timeHandler = TimeHandler::Create(audioDevice);
audioDevice->SetPaused(true);
pFormatCtx = avformat_alloc_context();
pFormatCtx->pb = stream->GetAVIOContext();
if((ret = avformat_open_input(&pFormatCtx, stream->GetPath().c_str(), NULL, NULL)) != 0){
char ebuf[512];
av_strerror(ret, ebuf, sizeof(ebuf));
FlogE("couldn't open file");
FlogE(ebuf);
throw VideoException(VideoException::EFile);
}
/* Get stream information */
if(avformat_find_stream_info(pFormatCtx, NULL) < 0){
FlogE("couldn't get stream info");
throw VideoException(VideoException::EStreamInfo);
}
/* Print video format information */
av_dump_format(pFormatCtx, 0, stream->GetPath().c_str(), 0);
// If the loader logged something about wmv being DRM protected, give up
if(drm){
throw VideoException(VideoException::EStream);
}
// find the best audio and video streams
audioStream = videoStream = AVERROR_STREAM_NOT_FOUND;
pCodec = 0;
videoStream = av_find_best_stream(pFormatCtx, AVMEDIA_TYPE_VIDEO, -1, -1, &pCodec, 0);
if(videoStream == AVERROR_STREAM_NOT_FOUND){
FlogE("couldn't find stream");
throw VideoException(VideoException::EStream);
}
if(videoStream == AVERROR_DECODER_NOT_FOUND || !pCodec){
FlogE("unsupported codec");
throw VideoException(VideoException::EVideoCodec);
}
audioStream = av_find_best_stream(pFormatCtx, AVMEDIA_TYPE_AUDIO, -1, -1, NULL, 0);
if(hasAudioStream()){
audioHandler = AudioHandler::Create(pFormatCtx->streams[audioStream]->codec, audioDevice, timeHandler);
}else{
audioHandler = AudioHandlerNoSound::Create(audioDevice, timeHandler);
FlogD("no audio stream or unsupported audio codec");
}
/* Get a pointer to the codec context for the video stream */
pCodecCtx = pFormatCtx->streams[videoStream]->codec;
// Open codec
if(avcodec_open2(pCodecCtx, pCodec, NULL) < 0){
FlogE("unsupported codec");
throw VideoException(VideoException::EVideoCodec);
}
w = pCodecCtx->width;
h = pCodecCtx->height;
// limit framequeue memory size
int frameMemSize = avpicture_get_size((AVPixelFormat)pCodecCtx->pix_fmt, w, h);
int maxVideoQueueMem = 512 * 1024 * 1024; // 512 MB
maxFrameQueueSize = maxVideoQueueMem / frameMemSize;
// cap to 256
maxFrameQueueSize = std::min(maxFrameQueueSize, 256);
// tick the video so that firstPts and firstDts are set
tick(true);
}
