Function ffmpeg_send_packet

src/decoder/plugins/FfmpegDecoderPlugin.cxx:275–328

* Decode an #AVPacket and send the resulting PCM data to the decoder * API. * * @param min_frame skip all data before this PCM frame number; this * is used after seeking to skip data in an AVPacket until the exact * desired time stamp has been reached */

 * desired time stamp has been reached
 */
static DecoderCommand
ffmpeg_send_packet(DecoderClient &client, InputStream *is,
		   const AVPacket &packet,
		   AVCodecContext &codec_context,
		   const AVStream &stream,
		   AVFrame &frame,
		   uint64_t min_frame, size_t pcm_frame_size,
		   FfmpegBuffer &buffer)
{
	size_t skip_bytes = 0;

	const auto pts = StreamRelativePts(packet, stream);
	if (pts >= 0) {
		if (min_frame > 0) {
			auto cur_frame = PtsToPcmFrame(pts, stream,
						       codec_context);
			if (cur_frame < min_frame)
				skip_bytes = pcm_frame_size * (min_frame - cur_frame);
		} else
			client.SubmitTimestamp(FfmpegTimeToDouble(pts,
								  stream.time_base));
	}

	bool eof = false;

	int err = avcodec_send_packet(&codec_context, &packet);
	switch (err) {
	case 0:
		break;

	case AVERROR_EOF:
		eof = true;
		break;

	default:
		{
			char msg[256];
			av_strerror(err, msg, sizeof(msg));
			FmtWarning(ffmpeg_domain,
				   "avcodec_send_packet() failed: {}", msg);
		}

		return DecoderCommand::NONE;
	}

	auto cmd = FfmpegReceiveFrames(client, is, codec_context,
				       frame,
				       skip_bytes, buffer, eof);

	if (eof)
		cmd = DecoderCommand::STOP;

	return cmd;
}

[[gnu::const]]
static SampleFormat