internal int opus_multistream_decoder_init(
int Fs,
int channels,
int streams,
int coupled_streams,
byte[] mapping
)
{
int i, ret;
int decoder_ptr = 0;
if ((channels > 255) || (channels < 1) || (coupled_streams > streams) ||
(streams < 1) || (coupled_streams < 0) || (streams > 255 - coupled_streams))
{
throw new ArgumentException("Invalid channel or coupled stream count");
}
this.layout.nb_channels = channels;
this.layout.nb_streams = streams;
this.layout.nb_coupled_streams = coupled_streams;
for (i = 0; i < this.layout.nb_channels; i++)
{
this.layout.mapping[i] = mapping[i];
}
if (OpusMultistream.validate_layout(this.layout) == 0)
{
throw new ArgumentException("Invalid surround channel layout");
}
for (i = 0; i < this.layout.nb_coupled_streams; i++)
{
ret = this.decoders[decoder_ptr].opus_decoder_init(Fs, 2);
if (ret != OpusError.OPUS_OK)
{
return(ret);
}
decoder_ptr++;
}
for (; i < this.layout.nb_streams; i++)
{
ret = this.decoders[decoder_ptr].opus_decoder_init(Fs, 1);
if (ret != OpusError.OPUS_OK)
{
return(ret);
}
decoder_ptr++;
}
return(OpusError.OPUS_OK);
}
internal int opus_multistream_encoder_init(
int Fs,
int channels,
int streams,
int coupled_streams,
byte[] mapping,
OpusApplication application,
int surround
)
{
int i, ret;
int encoder_ptr;
if ((channels > 255) || (channels < 1) || (coupled_streams > streams) ||
(streams < 1) || (coupled_streams < 0) || (streams > 255 - coupled_streams))
{
return(OpusError.OPUS_BAD_ARG);
}
this.layout.nb_channels = channels;
this.layout.nb_streams = streams;
this.layout.nb_coupled_streams = coupled_streams;
this.subframe_mem[0] = this.subframe_mem[1] = this.subframe_mem[2] = 0;
if (surround == 0)
{
this.lfe_stream = -1;
}
this.bitrate_bps = OpusConstants.OPUS_AUTO;
this.application = application;
this.variable_duration = OpusFramesize.OPUS_FRAMESIZE_ARG;
for (i = 0; i < this.layout.nb_channels; i++)
{
this.layout.mapping[i] = mapping[i];
}
if (OpusMultistream.validate_layout(this.layout) == 0 || validate_encoder_layout(this.layout) == 0)
{
return(OpusError.OPUS_BAD_ARG);
}
encoder_ptr = 0;
for (i = 0; i < this.layout.nb_coupled_streams; i++)
{
ret = this.encoders[encoder_ptr].opus_init_encoder(Fs, 2, application);
if (ret != OpusError.OPUS_OK)
{
return(ret);
}
if (i == this.lfe_stream)
{
this.encoders[encoder_ptr].IsLFE = true;
}
encoder_ptr += 1;
}
for (; i < this.layout.nb_streams; i++)
{
ret = this.encoders[encoder_ptr].opus_init_encoder(Fs, 1, application);
if (i == this.lfe_stream)
{
this.encoders[encoder_ptr].IsLFE = true;
}
if (ret != OpusError.OPUS_OK)
{
return(ret);
}
encoder_ptr += 1;
}
if (surround != 0)
{
Arrays.MemSetInt(this.preemph_mem, 0, channels);
Arrays.MemSetInt(this.window_mem, 0, channels * 120);
}
this.surround = surround;
return(OpusError.OPUS_OK);
}
