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/*
* Copyright © 2016 Mozilla Foundation
*
* This program is made available under an ISC-style license. See the
* accompanying file LICENSE for details.
*/
#ifndef CUBEB_MIXER
#define CUBEB_MIXER
#include "cubeb/cubeb.h" // for cubeb_channel_layout ,CUBEB_CHANNEL_LAYOUT_MAPS and cubeb_stream_params.
#include <stdbool.h>
#if defined(__cplusplus)
extern "C" {
#endif
typedef enum {
CHANNEL_INVALID = -1,
CHANNEL_MONO = 0,
CHANNEL_LEFT,
CHANNEL_RIGHT,
CHANNEL_CENTER,
CHANNEL_LS,
CHANNEL_RS,
CHANNEL_RLS,
CHANNEL_RCENTER,
CHANNEL_RRS,
CHANNEL_LFE,
CHANNEL_MAX // Max number of supported channels.
} cubeb_channel;
static cubeb_channel const CHANNEL_INDEX_TO_ORDER[CUBEB_LAYOUT_MAX][CHANNEL_MAX] = {
{ CHANNEL_INVALID }, // UNDEFINED
{ CHANNEL_LEFT, CHANNEL_RIGHT }, // DUAL_MONO
{ CHANNEL_LEFT, CHANNEL_RIGHT, CHANNEL_LFE }, // DUAL_MONO_LFE
{ CHANNEL_MONO }, // MONO
{ CHANNEL_MONO, CHANNEL_LFE }, // MONO_LFE
{ CHANNEL_LEFT, CHANNEL_RIGHT }, // STEREO
{ CHANNEL_LEFT, CHANNEL_RIGHT, CHANNEL_LFE }, // STEREO_LFE
{ CHANNEL_LEFT, CHANNEL_RIGHT, CHANNEL_CENTER }, // 3F
{ CHANNEL_LEFT, CHANNEL_RIGHT, CHANNEL_CENTER, CHANNEL_LFE }, // 3F_LFE
{ CHANNEL_LEFT, CHANNEL_RIGHT, CHANNEL_RCENTER }, // 2F1
{ CHANNEL_LEFT, CHANNEL_RIGHT, CHANNEL_LFE, CHANNEL_RCENTER }, // 2F1_LFE
{ CHANNEL_LEFT, CHANNEL_RIGHT, CHANNEL_CENTER, CHANNEL_RCENTER }, // 3F1
{ CHANNEL_LEFT, CHANNEL_RIGHT, CHANNEL_CENTER, CHANNEL_LFE, CHANNEL_RCENTER }, // 3F1_LFE
{ CHANNEL_LEFT, CHANNEL_RIGHT, CHANNEL_LS, CHANNEL_RS }, // 2F2
{ CHANNEL_LEFT, CHANNEL_RIGHT, CHANNEL_LFE, CHANNEL_LS, CHANNEL_RS }, // 2F2_LFE
{ CHANNEL_LEFT, CHANNEL_RIGHT, CHANNEL_CENTER, CHANNEL_LS, CHANNEL_RS }, // 3F2
{ CHANNEL_LEFT, CHANNEL_RIGHT, CHANNEL_CENTER, CHANNEL_LFE, CHANNEL_LS, CHANNEL_RS }, // 3F2_LFE
{ CHANNEL_LEFT, CHANNEL_RIGHT, CHANNEL_CENTER, CHANNEL_LFE, CHANNEL_RCENTER, CHANNEL_LS, CHANNEL_RS }, // 3F3R_LFE
{ CHANNEL_LEFT, CHANNEL_RIGHT, CHANNEL_CENTER, CHANNEL_LFE, CHANNEL_RLS, CHANNEL_RRS, CHANNEL_LS, CHANNEL_RS } // 3F4_LFE
};
typedef struct {
unsigned int channels;
cubeb_channel map[CHANNEL_MAX];
} cubeb_channel_map;
cubeb_channel_layout cubeb_channel_map_to_layout(cubeb_channel_map const * channel_map);
bool cubeb_should_upmix(cubeb_stream_params const * stream, cubeb_stream_params const * mixer);
bool cubeb_should_downmix(cubeb_stream_params const * stream, cubeb_stream_params const * mixer);
void cubeb_downmix_float(float * const in, long inframes, float * out,
unsigned int in_channels, unsigned int out_channels,
cubeb_channel_layout in_layout, cubeb_channel_layout out_layout);
void cubeb_upmix_float(float * const in, long inframes, float * out,
unsigned int in_channels, unsigned int out_channels);
void cubeb_downmix_short(short * const in, long inframes, short * out,
unsigned int in_channels, unsigned int out_channels,
cubeb_channel_layout in_layout, cubeb_channel_layout out_layout);
#if defined(__cplusplus)
}
#endif
#endif // CUBEB_MIXER
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