public override bool Decode(Packet packet, Frame outFrame)
{
if (!(outFrame is AudioFrame audioFrame))
{
throw new ArgumentException($"{nameof(outFrame)}必须是{nameof(AudioFrame)}类型且不为null。");
}
if (packet != null)
{
int gotPicture = 0;
FF.avcodec_decode_audio4(codecContext, outFrame.frame, &gotPicture, packet.packet).CheckFFmpegCode("音频解码发生错误");
if (gotPicture == 0)
{
return(false);
}
if (stream != null)
{
outFrame.presentTimestamp = new Timestamp(outFrame.frame->Pts, stream->TimeBase);
}
audioFrame.format = InFormat;
if (resampler != null)
{
resampler.InternalResample(audioFrame); // resample and update
}
else
{
outFrame.UpdateFromNative();
}
}
else if (resampler != null)
{
resampler.ResampleFinal(audioFrame);
if (audioFrame.LineDataBytes == 0)
{
return(false);
}
}
else
{
return(false);
}
return(true);
}
public override bool Encode(Frame frame, Packet outPacket)
{
if (frame != null)
{
if (!(frame is AudioFrame))
{
throw new ArgumentException($"{nameof(frame)}必须是{nameof(AudioFrame)}类型", nameof(frame));
}
if (!(frame as AudioFrame).format.Equals(InFormat))
{
throw new ArgumentException("输入帧的格式和编码器输入格式不同");
}
}
if (resampler != null)
{
if (frame != null)
{
resampler.Resample(frame as AudioFrame, tempFrame);
frame = tempFrame;
}
else
{
resampler.ResampleFinal(tempFrame);
if (tempFrame.SampleCount > 0)
{
frame = tempFrame;
}
}
}
encodeFrames = 0;
outPacket.ReleaseNativeBuffer();
int gotPicture = 0;
if (frame != null)
{
try {
frame.SetupToNative();
frame.presentTimestamp = new Timestamp(inputFrames, new AVRational(1, OutFormat.SampleRate));
frame.presentTimestamp.Transform(codecContext->TimeBase);
frame.frame->Pts = frame.presentTimestamp.Value;
FF.avcodec_encode_audio2(codecContext, outPacket.packet, frame.frame, &gotPicture).CheckFFmpegCode("音频编码发生错误");
} finally {
frame.ReleaseSetup();
}
encodeFrames = frame.frame->NbSamples;
inputFrames += encodeFrames;
}
else
{
FF.avcodec_encode_audio2(codecContext, outPacket.packet, null, &gotPicture).CheckFFmpegCode("音频编码发生错误");
}
if (gotPicture != 0)
{
ConfigPakcet(outPacket);
return(true);
}
return(false);
}