deps/libchdr/include/libchdr/flac.h

   1 /* license:BSD-3-Clause
   2  * copyright-holders:Aaron Giles
   3  ***************************************************************************
   4
   5     flac.h
   6
   7     FLAC compression wrappers
   8
   9 ***************************************************************************/
  10
  11 #pragma once
  12
  13 #ifndef __FLAC_H__
  14 #define __FLAC_H__
  15
  16 #include <stdint.h>
  17
  18 /***************************************************************************
  19  *  TYPE DEFINITIONS
  20  ***************************************************************************
  21  */
  22
  23 typedef struct _flac_decoder flac_decoder;
  24 struct _flac_decoder {
  25                 /* output state */
  26         void *                  decoder;                                /* actual encoder */
  27         uint32_t                sample_rate;                    /* decoded sample rate */
  28         uint8_t                 channels;                               /* decoded number of channels */
  29         uint8_t                 bits_per_sample;                /* decoded bits per sample */
  30         uint32_t                compressed_offset;              /* current offset in compressed data */
  31         const uint8_t *         compressed_start;               /* start of compressed data */
  32         uint32_t                compressed_length;              /* length of compressed data */
  33         const uint8_t *         compressed2_start;              /* start of compressed data */
  34         uint32_t                compressed2_length;             /* length of compressed data */
  35         int16_t *               uncompressed_start[8];  /* pointer to start of uncompressed data (up to 8 streams) */
  36         uint32_t                uncompressed_offset;    /* current position in uncompressed data */
  37         uint32_t                uncompressed_length;    /* length of uncompressed data */
  38         int                     uncompressed_swap;              /* swap uncompressed sample data */
  39         uint8_t                 custom_header[0x2a];    /* custom header */
  40 };
  41
  42 /* ======================> flac_decoder */
  43
  44 int             flac_decoder_init(flac_decoder* decoder);
  45 void            flac_decoder_free(flac_decoder* decoder);
  46 int             flac_decoder_reset(flac_decoder* decoder, uint32_t sample_rate, uint8_t num_channels, uint32_t block_size, const void *buffer, uint32_t length);
  47 int             flac_decoder_decode_interleaved(flac_decoder* decoder, int16_t *samples, uint32_t num_samples, int swap_endian);
  48 uint32_t        flac_decoder_finish(flac_decoder* decoder);
  49
  50 #endif /* __FLAC_H__ */