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/*
* audio.h
* Copyright 2009-2013 John Lindgren
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions, and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions, and the following disclaimer in the documentation
* provided with the distribution.
*
* This software is provided "as is" and without any warranty, express or
* implied. In no event shall the authors be liable for any damages arising from
* the use of this software.
*/
#ifndef LIBAUDCORE_AUDIO_H
#define LIBAUDCORE_AUDIO_H
#define AUD_MAX_CHANNELS 10
/* 24-bit integer samples are padded to 32-bit; high byte is always 0 */
enum {
FMT_FLOAT,
FMT_S8, FMT_U8,
FMT_S16_LE, FMT_S16_BE, FMT_U16_LE, FMT_U16_BE,
FMT_S24_LE, FMT_S24_BE, FMT_U24_LE, FMT_U24_BE,
FMT_S32_LE, FMT_S32_BE, FMT_U32_LE, FMT_U32_BE};
struct ReplayGainInfo {
float track_gain; /* dB */
float track_peak; /* 0-1 */
float album_gain; /* dB */
float album_peak; /* 0-1 */
};
struct StereoVolume {
int left, right;
};
#ifdef WANT_AUD_BSWAP
#include <stdint.h>
#undef bswap16
#undef bswap32
#undef bswap64
/* GCC will optimize these to appropriate bswap instructions */
constexpr uint16_t bswap16 (uint16_t x)
{ return ((x & 0xff00) >> 8) | ((x & 0x00ff) << 8); }
constexpr uint32_t bswap32 (uint32_t x)
{
return ((x & 0xff000000) >> 24) | ((x & 0x00ff0000) >> 8) |
((x & 0x0000ff00) << 8) | ((x & 0x000000ff) << 24);
}
constexpr uint64_t bswap64 (uint64_t x)
{
return ((x & 0xff00000000000000) >> 56) | ((x & 0x00ff000000000000) >> 40) |
((x & 0x0000ff0000000000) >> 24) | ((x & 0x000000ff00000000) >> 8) |
((x & 0x00000000ff000000) << 8) | ((x & 0x0000000000ff0000) << 24) |
((x & 0x000000000000ff00) << 40) | ((x & 0x00000000000000ff) << 56);
}
#endif // WANT_AUD_BSWAP
#if @BIGENDIAN@
#define FMT_S16_NE FMT_S16_BE
#define FMT_U16_NE FMT_U16_BE
#define FMT_S24_NE FMT_S24_BE
#define FMT_U24_NE FMT_U24_BE
#define FMT_S32_NE FMT_S32_BE
#define FMT_U32_NE FMT_U32_BE
#ifdef WANT_AUD_BSWAP
#define FROM_BE16(x) (x)
#define FROM_BE32(x) (x)
#define FROM_BE64(x) (x)
#define FROM_LE16(x) (bswap16 (x))
#define FROM_LE32(x) (bswap32 (x))
#define FROM_LE64(x) (bswap64 (x))
#define TO_BE16(x) (x)
#define TO_BE32(x) (x)
#define TO_BE64(x) (x)
#define TO_LE16(x) (bswap16 (x))
#define TO_LE32(x) (bswap32 (x))
#define TO_LE64(x) (bswap64 (x))
#endif
#else // ! BIGENDIAN
#define FMT_S16_NE FMT_S16_LE
#define FMT_U16_NE FMT_U16_LE
#define FMT_S24_NE FMT_S24_LE
#define FMT_U24_NE FMT_U24_LE
#define FMT_S32_NE FMT_S32_LE
#define FMT_U32_NE FMT_U32_LE
#ifdef WANT_AUD_BSWAP
#define FROM_BE16(x) (bswap16 (x))
#define FROM_BE32(x) (bswap32 (x))
#define FROM_BE64(x) (bswap64 (x))
#define FROM_LE16(x) (x)
#define FROM_LE32(x) (x)
#define FROM_LE64(x) (x)
#define TO_BE16(x) (bswap16 (x))
#define TO_BE32(x) (bswap32 (x))
#define TO_BE64(x) (bswap64 (x))
#define TO_LE16(x) (x)
#define TO_LE32(x) (x)
#define TO_LE64(x) (x)
#endif
#endif
#define FMT_SIZEOF(f) ((f) == FMT_FLOAT ? sizeof (float) : (f) <= FMT_U8 ? 1 : (f) <= FMT_U16_BE ? 2 : 4)
void audio_interlace (const void * const * in, int format, int channels, void * out, int frames);
void audio_deinterlace (const void * in, int format, int channels, void * const * out, int frames);
void audio_from_int (const void * in, int format, float * out, int samples);
void audio_to_int (const float * in, void * out, int format, int samples);
void audio_amplify (float * data, int channels, int frames, const float * factors);
void audio_amplify (float * data, int channels, int frames, StereoVolume volume);
void audio_soft_clip (float * data, int samples);
#endif /* LIBAUDCORE_AUDIO_H */
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