private void SetupFormat()
{
if (ffmpeg.avformat_find_stream_info(_formatContext, null) != 0)
{
throw new ApplicationException(@"Could not find stream info");
}
_formatContext->flags |= ffmpeg.AVFMT_FLAG_DISCARD_CORRUPT;
_formatContext->flags |= ffmpeg.AVFMT_FLAG_NOBUFFER;
for (int i = 0; i < _formatContext->nb_streams; i++)
{
if (_formatContext->streams[i]->codec->codec_type == AVMediaType.AVMEDIA_TYPE_VIDEO)
{
// get the pointer to the codec context for the video stream
_codecContext = _formatContext->streams[i]->codec;
_codecContext->workaround_bugs = 1;
_videoStream = _formatContext->streams[i];
break;
}
}
if (_videoStream != null)
{
_codecContext->flags2 |= ffmpeg.CODEC_FLAG2_FAST | ffmpeg.CODEC_FLAG2_CHUNKS |
ffmpeg.CODEC_FLAG_LOW_DELAY;
var codec = ffmpeg.avcodec_find_decoder(_codecContext->codec_id);
if (codec == null)
{
throw new ApplicationException("Cannot find a codec to decode the video stream.");
}
if ((codec->capabilities & ffmpeg.AV_CODEC_CAP_TRUNCATED) == ffmpeg.AV_CODEC_CAP_TRUNCATED)
{
_codecContext->flags |= ffmpeg.AV_CODEC_FLAG_TRUNCATED;
}
if (ffmpeg.avcodec_open2(_codecContext, codec, null) < 0)
{
throw new ApplicationException("Cannot open the video codec.");
}
_lastVideoFrame = DateTime.UtcNow;
AVHWAccel *hwaccel = null;
while (true)
{
hwaccel = ffmpeg.av_hwaccel_next(hwaccel);
if (hwaccel == null)
{
break;
}
if (hwaccel->id == _codecContext->codec_id && hwaccel->pix_fmt == _codecContext->pix_fmt)
{
Logger.LogMessage("USing HW decoder");
_codecContext->hwaccel = hwaccel;
break;
}
}
}
_lastPacket = DateTime.UtcNow;
for (int i = 0; i < _formatContext->nb_streams; i++)
{
if (_formatContext->streams[i]->codec->codec_type == AVMediaType.AVMEDIA_TYPE_AUDIO)
{
_audioCodecContext = _formatContext->streams[i]->codec;
_audioStream = _formatContext->streams[i];
break;
}
}
if (_audioStream != null)
{
AVCodec *audiocodec = ffmpeg.avcodec_find_decoder(_audioCodecContext->codec_id);
if (audiocodec != null)
{
_audioCodecContext->refcounted_frames = 0;
if (ffmpeg.avcodec_open2(_audioCodecContext, audiocodec, null) == 0)
{
_audioCodecContext->request_sample_fmt = AVSampleFormat.AV_SAMPLE_FMT_S16;
int chans = 1;
if (_audioCodecContext->channels > 1) //downmix
{
chans = 2;
}
_swrContext = ffmpeg.swr_alloc_set_opts(null,
ffmpeg.av_get_default_channel_layout(chans),
AVSampleFormat.AV_SAMPLE_FMT_S16,
_audioCodecContext->sample_rate,
ffmpeg.av_get_default_channel_layout(_audioCodecContext->channels),
_audioCodecContext->sample_fmt,
_audioCodecContext->sample_rate,
0,
null);
ffmpeg.swr_init(_swrContext);
RecordingFormat = new WaveFormat(_audioCodecContext->sample_rate, 16, _audioCodecContext->channels);
}
}
}
if (_videoStream == null && _audioStream == null)
{
throw new ApplicationException("Cannot find any streams.");
}
_lastPacket = DateTime.UtcNow;
_thread = new Thread(ReadFrames)
{
Name = Source, IsBackground = true
};
_thread.Start();
}
private void SetupFormat()
{
if (ffmpeg.avformat_find_stream_info(_formatContext, null) != 0)
{
throw new ApplicationException("Could not find stream info");
}
//_formatContext->flags |= ffmpeg.AVFMT_FLAG_DISCARD_CORRUPT;
//_formatContext->flags |= ffmpeg.AVFMT_FLAG_NOBUFFER;
for (var i = 0; i < _formatContext->nb_streams; i++)
{
if (_formatContext->streams[i]->codec->codec_type == AVMediaType.AVMEDIA_TYPE_VIDEO)
{
// get the pointer to the codec context for the video stream
_videoCodecContext = _formatContext->streams[i]->codec;
_videoStream = _formatContext->streams[i];
break;
}
}
if (_videoStream != null)
{
var codec = ffmpeg.avcodec_find_decoder(_videoCodecContext->codec_id);
if (codec == null)
{
throw new ApplicationException("Cannot find a codec to decode the video stream.");
}
_videoCodecContext->refcounted_frames = 1;
_lastVideoFrame = DateTime.UtcNow;
AVHWAccel *hwaccel = null;
while (true)
{
hwaccel = ffmpeg.av_hwaccel_next(hwaccel);
if (hwaccel == null)
{
break;
}
if (hwaccel->id == _videoCodecContext->codec_id && hwaccel->pix_fmt == _videoCodecContext->pix_fmt)
{
Logger.LogMessage("Using HW decoder");
_videoCodecContext->hwaccel = hwaccel;
break;
}
}
//_videoCodecContext->idct_algo = ffmpeg.FF_IDCT_AUTO;
//_videoCodecContext->skip_frame = AVDiscard.AVDISCARD_DEFAULT;
//_videoCodecContext->skip_idct = AVDiscard.AVDISCARD_DEFAULT;
//_videoCodecContext->skip_loop_filter = AVDiscard.AVDISCARD_DEFAULT;
//_videoCodecContext->error_concealment = 3;
_videoCodecContext->workaround_bugs = 1;
_videoCodecContext->flags2 |= ffmpeg.CODEC_FLAG2_FAST | ffmpeg.CODEC_FLAG_LOW_DELAY;// | ffmpeg.CODEC_FLAG2_CHUNKS;
if ((codec->capabilities & ffmpeg.CODEC_CAP_DR1) != 0)
{
_videoCodecContext->flags |= ffmpeg.CODEC_FLAG_EMU_EDGE;
}
if ((codec->capabilities & ffmpeg.AV_CODEC_CAP_TRUNCATED) == ffmpeg.AV_CODEC_CAP_TRUNCATED)
{
_videoCodecContext->flags |= ffmpeg.AV_CODEC_FLAG_TRUNCATED;
}
Throw("OPEN2", ffmpeg.avcodec_open2(_videoCodecContext, codec, null));
_videoFrame = ffmpeg.av_frame_alloc();
}
_lastPacket = DateTime.UtcNow;
for (var i = 0; i < _formatContext->nb_streams; i++)
{
if (_formatContext->streams[i]->codec->codec_type == AVMediaType.AVMEDIA_TYPE_AUDIO)
{
_audioCodecContext = _formatContext->streams[i]->codec;
_audioStream = _formatContext->streams[i];
break;
}
}
if (_audioStream != null)
{
var audiocodec = ffmpeg.avcodec_find_decoder(_audioCodecContext->codec_id);
if (audiocodec != null)
{
_audioCodecContext->refcounted_frames = 1;
Throw("OPEN2 audio", ffmpeg.avcodec_open2(_audioCodecContext, audiocodec, null));
var outlayout = ffmpeg.av_get_default_channel_layout(OutFormat.Channels);
_audioCodecContext->request_sample_fmt = AVSampleFormat.AV_SAMPLE_FMT_S16;
_audioCodecContext->request_channel_layout = (ulong)outlayout;
//var chans = 1;
//if (_audioCodecContext->channels > 1) //downmix
// chans = 2;
_swrContext = ffmpeg.swr_alloc_set_opts(null,
outlayout,
AVSampleFormat.AV_SAMPLE_FMT_S16,
OutFormat.SampleRate,
ffmpeg.av_get_default_channel_layout(_audioCodecContext->channels),
_audioCodecContext->sample_fmt,
_audioCodecContext->sample_rate,
0,
null);
Throw("SWR_INIT", ffmpeg.swr_init(_swrContext));
_audioFrame = ffmpeg.av_frame_alloc();
}
}
if (_videoStream == null && _audioStream == null)
{
throw new ApplicationException("Cannot find any streams.");
}
_lastPacket = DateTime.UtcNow;
if (_abort)
{
throw new Exception("Connect aborted");
}
_thread = new Thread(ReadFrames)
{
Name = Source, IsBackground = false
};
_thread.Start();
}
