chromium/third_party/opus/src/src/opus_projection_encoder.c

/* Copyright (c) 2017 Google Inc.
   Written by Andrew Allen */
/*
   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 "mathops.h"
#include "os_support.h"
#include "opus_private.h"
#include "opus_defines.h"
#include "opus_projection.h"
#include "opus_multistream.h"
#include "stack_alloc.h"
#include "mapping_matrix.h"

struct OpusProjectionEncoder
{ … };

#if !defined(DISABLE_FLOAT_API)
static void opus_projection_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_projection_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
)
{ … }

static int get_order_plus_one_from_channels(int channels, int *order_plus_one)
{ … }

static int get_streams_from_channels(int channels, int mapping_family,
                                     int *streams, int *coupled_streams,
                                     int *order_plus_one)
{ … }

static MappingMatrix *get_mixing_matrix(OpusProjectionEncoder *st)
{ … }

static MappingMatrix *get_enc_demixing_matrix(OpusProjectionEncoder *st)
{ … }

static OpusMSEncoder *get_multistream_encoder(OpusProjectionEncoder *st)
{ … }

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

int opus_projection_ambisonics_encoder_init(OpusProjectionEncoder *st, opus_int32 Fs,
                                            int channels, int mapping_family,
                                            int *streams, int *coupled_streams,
                                            int application)
{ … }

OpusProjectionEncoder *opus_projection_ambisonics_encoder_create(
    opus_int32 Fs, int channels, int mapping_family, int *streams,
    int *coupled_streams, int application, int *error)
{ … }

int opus_projection_encode(OpusProjectionEncoder *st, const opus_int16 *pcm,
                           int frame_size, unsigned char *data,
                           opus_int32 max_data_bytes)
{ … }

#ifndef DISABLE_FLOAT_API
#ifdef FIXED_POINT
int opus_projection_encode_float(OpusProjectionEncoder *st, const float *pcm,
                                 int frame_size, unsigned char *data,
                                 opus_int32 max_data_bytes)
{
  return opus_multistream_encode_native(get_multistream_encoder(st),
    opus_projection_copy_channel_in_float, pcm, frame_size, data,
    max_data_bytes, 16, downmix_float, 1, get_mixing_matrix(st));
}
#else
int opus_projection_encode_float(OpusProjectionEncoder *st, const float *pcm,
                                 int frame_size, unsigned char *data,
                                 opus_int32 max_data_bytes)
{ … }
#endif
#endif

void opus_projection_encoder_destroy(OpusProjectionEncoder *st)
{ … }

int opus_projection_encoder_ctl(OpusProjectionEncoder *st, int request, ...)
{ … }