deps/libretro-common/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 #include "libchdr_zlib.h"
  18 #include "FLAC/ordinals.h"
  19 #include "FLAC/stream_decoder.h"
  20
  21 /***************************************************************************
  22  *  TYPE DEFINITIONS
  23  ***************************************************************************
  24  */
  25
  26 typedef struct _flac_decoder flac_decoder;
  27 struct _flac_decoder {
  28                 /* output state */
  29         FLAC__StreamDecoder*    decoder;                                /* actual encoder */
  30         uint32_t                sample_rate;                    /* decoded sample rate */
  31         uint8_t                 channels;                               /* decoded number of channels */
  32         uint8_t                 bits_per_sample;                /* decoded bits per sample */
  33         uint32_t                compressed_offset;              /* current offset in compressed data */
  34         const FLAC__byte *      compressed_start;               /* start of compressed data */
  35         uint32_t                compressed_length;              /* length of compressed data */
  36         const FLAC__byte *      compressed2_start;              /* start of compressed data */
  37         uint32_t                compressed2_length;             /* length of compressed data */
  38         int16_t *               uncompressed_start[8];  /* pointer to start of uncompressed data (up to 8 streams) */
  39         uint32_t                uncompressed_offset;    /* current position in uncompressed data */
  40         uint32_t                uncompressed_length;    /* length of uncompressed data */
  41         int                     uncompressed_swap;              /* swap uncompressed sample data */
  42         uint8_t                 custom_header[0x2a];    /* custom header */
  43 };
  44
  45 /* ======================> flac_decoder */
  46
  47 void            flac_decoder_init(flac_decoder* decoder);
  48 void            flac_decoder_free(flac_decoder* decoder);
  49 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);
  50 int             flac_decoder_decode_interleaved(flac_decoder* decoder, int16_t *samples, uint32_t num_samples, int swap_endian);
  51 uint32_t        flac_decoder_finish(flac_decoder* decoder);
  52
  53 /* codec-private data for the CDFL codec */
  54 typedef struct _cdfl_codec_data cdfl_codec_data;
  55 struct _cdfl_codec_data {
  56         /* internal state */
  57         int             swap_endian;
  58         flac_decoder    decoder;
  59 #ifdef WANT_SUBCODE
  60         zlib_codec_data         subcode_decompressor;
  61 #endif
  62         uint8_t*        buffer;
  63 };
  64
  65 /* cdfl compression codec */
  66 chd_error cdfl_codec_init(void* codec, uint32_t hunkbytes);
  67 void cdfl_codec_free(void* codec);
  68 chd_error cdfl_codec_decompress(void *codec, const uint8_t *src, uint32_t complen, uint8_t *dest, uint32_t destlen);
  69
  70 #endif /* __FLAC_H__ */