static void libopus_write_header(AVCodecContext *avctx, int stream_count, int coupled_stream_count, const uint8_t *channel_mapping) { uint8_t *p = avctx->extradata; int channels = avctx->channels; bytestream_put_buffer(&p, "OpusHead", 8); bytestream_put_byte(&p, 1); /* Version */ bytestream_put_byte(&p, channels); bytestream_put_le16(&p, avctx->delay); /* Lookahead samples at 48kHz */ bytestream_put_le32(&p, avctx->sample_rate); /* Original sample rate */ bytestream_put_le16(&p, 0); /* Gain of 0dB is recommended. */ /* Channel mapping */ if (channels > 2) { bytestream_put_byte(&p, channels <= 8 ? 1 : 255); bytestream_put_byte(&p, stream_count); bytestream_put_byte(&p, coupled_stream_count); bytestream_put_buffer(&p, channel_mapping, channels); } else { bytestream_put_byte(&p, 0); } }
static void libopus_write_header(AVCodecContext *avctx, int stream_count, int coupled_stream_count, const uint8_t *channel_mapping) { uint8_t *p = avctx->extradata; int channels = avctx->channels; bytestream_put_buffer(&p, "OpusHead", 8); bytestream_put_byte(&p, 1);   bytestream_put_byte(&p, channels); bytestream_put_le16(&p, avctx->delay);   bytestream_put_le32(&p, avctx->sample_rate);   bytestream_put_le16(&p, 0);     if (channels > 2) { bytestream_put_byte(&p, channels <= 8 ? 1 : 255); bytestream_put_byte(&p, stream_count); bytestream_put_byte(&p, coupled_stream_count); bytestream_put_buffer(&p, channel_mapping, channels); } else { bytestream_put_byte(&p, 0); } }