chromium/third_party/opus/src/src/opus_multistream_decoder.c

/* Copyright (c) 2011 Xiph.Org Foundation
   Written by Jean-Marc Valin */
/*
   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions
   are met:

   - Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.

   - Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
   OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "opus_multistream.h"
#include "opus.h"
#include "opus_private.h"
#include "stack_alloc.h"
#include <stdarg.h>
#include "float_cast.h"
#include "os_support.h"

/* DECODER */

#if defined(ENABLE_HARDENING) || defined(ENABLE_ASSERTIONS)
static void validate_ms_decoder(OpusMSDecoder *st)
{ … }
#define VALIDATE_MS_DECODER(st) …
#else
#define VALIDATE_MS_DECODER …
#endif


opus_int32 opus_multistream_decoder_get_size(int nb_streams, int nb_coupled_streams)
{ … }

int opus_multistream_decoder_init(
      OpusMSDecoder *st,
      opus_int32 Fs,
      int channels,
      int streams,
      int coupled_streams,
      const unsigned char *mapping
)
{ … }


OpusMSDecoder *opus_multistream_decoder_create(
      opus_int32 Fs,
      int channels,
      int streams,
      int coupled_streams,
      const unsigned char *mapping,
      int *error
)
{ … }

static int opus_multistream_packet_validate(const unsigned char *data,
      opus_int32 len, int nb_streams, opus_int32 Fs)
{ … }

int opus_multistream_decode_native(
      OpusMSDecoder *st,
      const unsigned char *data,
      opus_int32 len,
      void *pcm,
      opus_copy_channel_out_func copy_channel_out,
      int frame_size,
      int decode_fec,
      int soft_clip,
      void *user_data
)
{ … }

#if !defined(DISABLE_FLOAT_API)
static void opus_copy_channel_out_float(
  void *dst,
  int dst_stride,
  int dst_channel,
  const opus_val16 *src,
  int src_stride,
  int frame_size,
  void *user_data
)
{ … }
#endif

static void opus_copy_channel_out_short(
  void *dst,
  int dst_stride,
  int dst_channel,
  const opus_val16 *src,
  int src_stride,
  int frame_size,
  void *user_data
)
{ … }



#ifdef FIXED_POINT
int opus_multistream_decode(
      OpusMSDecoder *st,
      const unsigned char *data,
      opus_int32 len,
      opus_int16 *pcm,
      int frame_size,
      int decode_fec
)
{
   return opus_multistream_decode_native(st, data, len,
       pcm, opus_copy_channel_out_short, frame_size, decode_fec, 0, NULL);
}

#ifndef DISABLE_FLOAT_API
int opus_multistream_decode_float(OpusMSDecoder *st, const unsigned char *data,
      opus_int32 len, float *pcm, int frame_size, int decode_fec)
{
   return opus_multistream_decode_native(st, data, len,
       pcm, opus_copy_channel_out_float, frame_size, decode_fec, 0, NULL);
}
#endif

#else

int opus_multistream_decode(OpusMSDecoder *st, const unsigned char *data,
      opus_int32 len, opus_int16 *pcm, int frame_size, int decode_fec)
{ … }

int opus_multistream_decode_float(
      OpusMSDecoder *st,
      const unsigned char *data,
      opus_int32 len,
      opus_val16 *pcm,
      int frame_size,
      int decode_fec
)
{ … }
#endif

int opus_multistream_decoder_ctl_va_list(OpusMSDecoder *st, int request,
                                         va_list ap)
{ … }

int opus_multistream_decoder_ctl(OpusMSDecoder *st, int request, ...)
{ … }

void opus_multistream_decoder_destroy(OpusMSDecoder *st)
{ … }