opus_multistream_encoder.c | Explore in Territory

/* 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"
#include "mathops.h"
#include "mdct.h"
#include "modes.h"
#include "bands.h"
#include "quant_bands.h"
#include "pitch.h"

VorbisLayout;

/* Index is nb_channel-1*/
static const VorbisLayout vorbis_mappings[8] = …;

static opus_val32 *ms_get_preemph_mem(OpusMSEncoder *st)
{ … }

static opus_val32 *ms_get_window_mem(OpusMSEncoder *st)
{ … }

static int validate_ambisonics(int nb_channels, int *nb_streams, int *nb_coupled_streams)
{ … }

static int validate_encoder_layout(const ChannelLayout *layout)
{ … }

static void channel_pos(int channels, int pos[8])
{ … }

#if 1
/* Computes a rough approximation of log2(2^a + 2^b) */
static opus_val16 logSum(opus_val16 a, opus_val16 b)
{ … }
#else
opus_val16 logSum(opus_val16 a, opus_val16 b)
{
   return log2(pow(4, a)+ pow(4, b))/2;
}
#endif

void surround_analysis(const CELTMode *celt_mode, const void *pcm, opus_val16 *bandLogE, opus_val32 *mem, opus_val32 *preemph_mem,
      int len, int overlap, int channels, int rate, opus_copy_channel_in_func copy_channel_in, int arch
)
{ … }

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

opus_int32 opus_multistream_surround_encoder_get_size(int channels, int mapping_family)
{ … }

static int opus_multistream_encoder_init_impl(
      OpusMSEncoder *st,
      opus_int32 Fs,
      int channels,
      int streams,
      int coupled_streams,
      const unsigned char *mapping,
      int application,
      MappingType mapping_type
)
{ … }

int opus_multistream_encoder_init(
      OpusMSEncoder *st,
      opus_int32 Fs,
      int channels,
      int streams,
      int coupled_streams,
      const unsigned char *mapping,
      int application
)
{ … }

int opus_multistream_surround_encoder_init(
      OpusMSEncoder *st,
      opus_int32 Fs,
      int channels,
      int mapping_family,
      int *streams,
      int *coupled_streams,
      unsigned char *mapping,
      int application
)
{ … }

OpusMSEncoder *opus_multistream_encoder_create(
      opus_int32 Fs,
      int channels,
      int streams,
      int coupled_streams,
      const unsigned char *mapping,
      int application,
      int *error
)
{ … }

OpusMSEncoder *opus_multistream_surround_encoder_create(
      opus_int32 Fs,
      int channels,
      int mapping_family,
      int *streams,
      int *coupled_streams,
      unsigned char *mapping,
      int application,
      int *error
)
{ … }

static void surround_rate_allocation(
      OpusMSEncoder *st,
      opus_int32 *rate,
      int frame_size,
      opus_int32 Fs
      )
{ … }

static void ambisonics_rate_allocation(
      OpusMSEncoder *st,
      opus_int32 *rate,
      int frame_size,
      opus_int32 Fs
      )
{ … }

static opus_int32 rate_allocation(
      OpusMSEncoder *st,
      opus_int32 *rate,
      int frame_size
      )
{ … }

/* Max size in case the encoder decides to return six frames (6 x 20 ms = 120 ms) */
#define MS_FRAME_TMP …
int opus_multistream_encode_native
(
    OpusMSEncoder *st,
    opus_copy_channel_in_func copy_channel_in,
    const void *pcm,
    int analysis_frame_size,
    unsigned char *data,
    opus_int32 max_data_bytes,
    int lsb_depth,
    downmix_func downmix,
    int float_api,
    void *user_data
)
{ … }

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

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


#ifdef FIXED_POINT
int opus_multistream_encode(
    OpusMSEncoder *st,
    const opus_val16 *pcm,
    int frame_size,
    unsigned char *data,
    opus_int32 max_data_bytes
)
{
   return opus_multistream_encode_native(st, opus_copy_channel_in_short,
      pcm, frame_size, data, max_data_bytes, 16, downmix_int, 0, NULL);
}

#ifndef DISABLE_FLOAT_API
int opus_multistream_encode_float(
    OpusMSEncoder *st,
    const float *pcm,
    int frame_size,
    unsigned char *data,
    opus_int32 max_data_bytes
)
{
   return opus_multistream_encode_native(st, opus_copy_channel_in_float,
      pcm, frame_size, data, max_data_bytes, 16, downmix_float, 1, NULL);
}
#endif

#else

int opus_multistream_encode_float
(
    OpusMSEncoder *st,
    const opus_val16 *pcm,
    int frame_size,
    unsigned char *data,
    opus_int32 max_data_bytes
)
{ … }

int opus_multistream_encode(
    OpusMSEncoder *st,
    const opus_int16 *pcm,
    int frame_size,
    unsigned char *data,
    opus_int32 max_data_bytes
)
{ … }
#endif

int opus_multistream_encoder_ctl_va_list(OpusMSEncoder *st, int request,
                                         va_list ap)
{ … }

int opus_multistream_encoder_ctl(OpusMSEncoder *st, int request, ...)
{ … }

void opus_multistream_encoder_destroy(OpusMSEncoder *st)
{ … }
chromium/third_party/opus/src/src/opus_multistream_encoder.c
