mirror of https://github.com/nu774/fdkaac.git
38 lines
1.1 KiB
C
38 lines
1.1 KiB
C
/*
|
|
* Copyright (C) 2013 nu774
|
|
* For conditions of distribution and use, see copyright notice in COPYING
|
|
*/
|
|
#ifndef LPCM_H
|
|
#define LPCM_H
|
|
|
|
enum pcm_type {
|
|
PCM_TYPE_UNKNOWN = 0,
|
|
PCM_TYPE_SINT = 1,
|
|
PCM_TYPE_UINT = 2,
|
|
PCM_TYPE_FLOAT = 4,
|
|
PCM_TYPE_SINT_BE = (8|1),
|
|
PCM_TYPE_UINT_BE = (8|2),
|
|
PCM_TYPE_FLOAT_BE = (8|4),
|
|
};
|
|
|
|
typedef struct pcm_sample_description_t {
|
|
enum pcm_type sample_type;
|
|
uint32_t sample_rate;
|
|
uint8_t bits_per_channel;
|
|
uint8_t bytes_per_frame;
|
|
uint8_t channels_per_frame;
|
|
uint32_t channel_mask;
|
|
} pcm_sample_description_t;
|
|
|
|
#define PCM_IS_SINT(desc) ((desc)->sample_type & 1)
|
|
#define PCM_IS_UINT(desc) ((desc)->sample_type & 2)
|
|
#define PCM_IS_FLOAT(desc) ((desc)->sample_type & 4)
|
|
#define PCM_IS_BIG_ENDIAN(desc) ((desc)->sample_type & 8)
|
|
#define PCM_BYTES_PER_CHANNEL(desc) \
|
|
((desc)->bytes_per_frame / (desc)->channels_per_frame)
|
|
|
|
int pcm_convert_to_native_sint16(const pcm_sample_description_t *format,
|
|
const void *input, uint32_t nframes,
|
|
int16_t **result, uint32_t *osize);
|
|
#endif
|