deps/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 #include <FLAC/all.h>
  18
  19 /***************************************************************************
  20  *  TYPE DEFINITIONS
  21  ***************************************************************************
  22  */
  23
  24 typedef struct _flac_decoder flac_decoder;
  25 struct _flac_decoder {
  26                 /* output state */
  27         FLAC__StreamDecoder*    decoder;                                /* actual encoder */
  28         uint32_t                sample_rate;                    /* decoded sample rate */
  29         uint8_t                 channels;                               /* decoded number of channels */
  30         uint8_t                 bits_per_sample;                /* decoded bits per sample */
  31         uint32_t                compressed_offset;              /* current offset in compressed data */
  32         const FLAC__byte *      compressed_start;               /* start of compressed data */
  33         uint32_t                compressed_length;              /* length of compressed data */
  34         const FLAC__byte *      compressed2_start;              /* start of compressed data */
  35         uint32_t                compressed2_length;             /* length of compressed data */
  36         int16_t *               uncompressed_start[8];  /* pointer to start of uncompressed data (up to 8 streams) */
  37         uint32_t                uncompressed_offset;    /* current position in uncompressed data */
  38         uint32_t                uncompressed_length;    /* length of uncompressed data */
  39         int                     uncompressed_swap;              /* swap uncompressed sample data */
  40         uint8_t                 custom_header[0x2a];    /* custom header */
  41 };
  42
  43 /* ======================> flac_decoder */
  44
  45 void            flac_decoder_init(flac_decoder* decoder);
  46 void            flac_decoder_free(flac_decoder* decoder);
  47 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);
  48 int             flac_decoder_decode_interleaved(flac_decoder* decoder, int16_t *samples, uint32_t num_samples, int swap_endian);
  49 uint32_t        flac_decoder_finish(flac_decoder* decoder);
  50
  51 #endif /* __FLAC_H__ */