internal int opus_repacketizer_cat_impl(byte[] data, int data_ptr, int len, int self_delimited)
{
byte dummy_toc;
int dummy_offset;
int curr_nb_frames, ret;
/* Set of check ToC */
if (len < 1)
{
return(OpusError.OPUS_INVALID_PACKET);
}
if (this.nb_frames == 0)
{
this.toc = data[data_ptr];
this.framesize = OpusPacketInfo.GetNumSamplesPerFrame(data, data_ptr, 8000);
}
else if ((this.toc & 0xFC) != (data[data_ptr] & 0xFC))
{
/*fprintf(stderr, "toc mismatch: 0x%x vs 0x%x\n", rp.toc, data[0]);*/
return(OpusError.OPUS_INVALID_PACKET);
}
curr_nb_frames = OpusPacketInfo.GetNumFrames(data, data_ptr, len);
if (curr_nb_frames < 1)
{
return(OpusError.OPUS_INVALID_PACKET);
}
/* Check the 120 ms maximum packet size */
if ((curr_nb_frames + this.nb_frames) * this.framesize > 960)
{
return(OpusError.OPUS_INVALID_PACKET);
}
ret = OpusPacketInfo.opus_packet_parse_impl(data, data_ptr, len, self_delimited, out dummy_toc, this.frames, this.frames_ptrs, this.nb_frames, this.len, this.nb_frames, out dummy_offset, out dummy_offset);
if (ret < 1)
{
return(ret);
}
this.nb_frames += curr_nb_frames;
return(OpusError.OPUS_OK);
}
internal int opus_decode_native(byte[] data, int data_ptr,
int len, short[] pcm_out, int pcm_out_ptr, int frame_size, int decode_fec,
int self_delimited, out int packet_offset, int soft_clip)
{
int i, nb_samples;
int count, offset;
byte toc;
int packet_frame_size, packet_stream_channels;
packet_offset = 0;
OpusBandwidth packet_bandwidth;
OpusMode packet_mode;
/* 48 x 2.5 ms = 120 ms */
// fixme: make sure these values can fit in an int16
short[] size = new short[48];
if (decode_fec < 0 || decode_fec > 1)
{
return(OpusError.OPUS_BAD_ARG);
}
/* For FEC/PLC, frame_size has to be to have a multiple of 2.5 ms */
if ((decode_fec != 0 || len == 0 || data == null) && frame_size % (this.Fs / 400) != 0)
{
return(OpusError.OPUS_BAD_ARG);
}
if (len == 0 || data == null)
{
int pcm_count = 0;
do
{
int ret;
ret = opus_decode_frame(null, 0, 0, pcm_out, pcm_out_ptr + (pcm_count * this.channels), frame_size - pcm_count, 0);
if (ret < 0)
{
return(ret);
}
pcm_count += ret;
} while (pcm_count < frame_size);
Inlines.OpusAssert(pcm_count == frame_size);
this.last_packet_duration = pcm_count;
return(pcm_count);
}
else if (len < 0)
{
return(OpusError.OPUS_BAD_ARG);
}
packet_mode = OpusPacketInfo.GetEncoderMode(data, data_ptr);
packet_bandwidth = OpusPacketInfo.GetBandwidth(data, data_ptr);
packet_frame_size = OpusPacketInfo.GetNumSamplesPerFrame(data, data_ptr, this.Fs);
packet_stream_channels = OpusPacketInfo.GetNumEncodedChannels(data, data_ptr);
count = OpusPacketInfo.opus_packet_parse_impl(data, data_ptr, len, self_delimited, out toc, null, null, 0,
size, 0, out offset, out packet_offset);
if (count < 0)
{
return(count);
}
data_ptr += offset;
if (decode_fec != 0)
{
int dummy;
int duration_copy;
int ret;
/* If no FEC can be present, run the PLC (recursive call) */
if (frame_size < packet_frame_size || packet_mode == OpusMode.MODE_CELT_ONLY || this.mode == OpusMode.MODE_CELT_ONLY)
{
return(opus_decode_native(null, 0, 0, pcm_out, pcm_out_ptr, frame_size, 0, 0, out dummy, soft_clip));
}
/* Otherwise, run the PLC on everything except the size for which we might have FEC */
duration_copy = this.last_packet_duration;
if (frame_size - packet_frame_size != 0)
{
ret = opus_decode_native(null, 0, 0, pcm_out, pcm_out_ptr, frame_size - packet_frame_size, 0, 0, out dummy, soft_clip);
if (ret < 0)
{
this.last_packet_duration = duration_copy;
return(ret);
}
Inlines.OpusAssert(ret == frame_size - packet_frame_size);
}
/* Complete with FEC */
this.mode = packet_mode;
this.bandwidth = packet_bandwidth;
this.frame_size = packet_frame_size;
this.stream_channels = packet_stream_channels;
ret = opus_decode_frame(data, data_ptr, size[0], pcm_out, pcm_out_ptr + (this.channels * (frame_size - packet_frame_size)),
packet_frame_size, 1);
if (ret < 0)
{
return(ret);
}
else
{
this.last_packet_duration = frame_size;
return(frame_size);
}
}
if (count * packet_frame_size > frame_size)
{
return(OpusError.OPUS_BUFFER_TOO_SMALL);
}
/* Update the state as the last step to avoid updating it on an invalid packet */
this.mode = packet_mode;
this.bandwidth = packet_bandwidth;
this.frame_size = packet_frame_size;
this.stream_channels = packet_stream_channels;
nb_samples = 0;
for (i = 0; i < count; i++)
{
int ret;
ret = opus_decode_frame(data, data_ptr, size[i], pcm_out, pcm_out_ptr + (nb_samples * this.channels), frame_size - nb_samples, 0);
if (ret < 0)
{
return(ret);
}
Inlines.OpusAssert(ret == packet_frame_size);
data_ptr += size[i];
nb_samples += ret;
}
this.last_packet_duration = nb_samples;
return(nb_samples);
}
