SDL_sound_CoreAudio: decoders/flac.c annotate

annotate decoders/flac.c @ 231:d3dc34315ac7

Rewind method implemented by Torbj�rn.

author	Ryan C. Gordon <icculus@icculus.org>
date	Sat, 19 Jan 2002 16:58:34 +0000
parents	c9772a9f5271
children	c97be6e1bd27

rev	line source
155 72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	1 /*
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	2 * SDL_sound -- An abstract sound format decoding API.
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	3 * Copyright (C) 2001 Ryan C. Gordon.
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	4 *
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	5 * This library is free software; you can redistribute it and/or
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	6 * modify it under the terms of the GNU Lesser General Public
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	7 * License as published by the Free Software Foundation; either
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	8 * version 2.1 of the License, or (at your option) any later version.
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	9 *
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	10 * This library is distributed in the hope that it will be useful,
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	13 * Lesser General Public License for more details.
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	14 *
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	15 * You should have received a copy of the GNU Lesser General Public
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	16 * License along with this library; if not, write to the Free Software
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	18 */
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	19
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	20 /*
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	21 * FLAC decoder for SDL_sound.
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	22 *
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	23 * This driver handles FLAC audio, that is to say the Free Lossless Audio
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	24 * Codec. It depends on libFLAC for decoding, which can be grabbed from:
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	25 * http://flac.sourceforge.net
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	26 *
184 47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING". Ryan C. Gordon <icculus@icculus.org> parents: 182 diff changeset	27 * Please see the file COPYING in the source's root directory.
155 72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	28 *
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	29 * This file written by Torbj�rn Andersson. (d91tan@Update.UU.SE)
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	30 */
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	31
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	32 #if HAVE_CONFIG_H
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	33 # include <config.h>
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	34 #endif
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	35
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	36 #ifdef SOUND_SUPPORTS_FLAC
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	37
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	38 #include <stdio.h>
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	39 #include <stdlib.h>
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	40 #include <string.h>
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	41 #include <assert.h>
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	42
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	43 #include "SDL_sound.h"
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	44
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	45 #define __SDL_SOUND_INTERNAL__
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	46 #include "SDL_sound_internal.h"
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	47
231 d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	48 /*
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	49 * libFLAC 1.0.1 added a seekable stream decoder, but if I understand the
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	50 * documentation correctly it's still much easier for us to handle the rewind
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	51 * method ourselves.
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	52 */
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	53
164 77482005beb6 Now includes FLAC/stream_decoder.h instead of FLAC/all.h. More robust Ryan C. Gordon <icculus@icculus.org> parents: 155 diff changeset	54 #include "FLAC/stream_decoder.h"
155 72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	55
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	56
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	57 static int FLAC_init(void);
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	58 static void FLAC_quit(void);
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	59 static int FLAC_open(Sound_Sample sample, const char ext);
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	60 static void FLAC_close(Sound_Sample *sample);
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	61 static Uint32 FLAC_read(Sound_Sample *sample);
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	62 static int FLAC_rewind(Sound_Sample *sample);
155 72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	63
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	64 static const char *extensions_flac[] = { "FLAC", "FLA", NULL };
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	65
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	66 const Sound_DecoderFunctions __Sound_DecoderFunctions_FLAC =
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	67 {
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	68 {
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	69 extensions_flac,
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	70 "Free Lossless Audio Codec",
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	71 "Torbj�rn Andersson <d91tan@Update.UU.SE>",
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	72 "http://flac.sourceforge.net/"
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	73 },
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	74
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	75 FLAC_init, /* init() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	76 FLAC_quit, /* quit() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	77 FLAC_open, /* open() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	78 FLAC_close, /* close() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	79 FLAC_read, /* read() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	80 FLAC_rewind /* rewind() method */
155 72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	81 };
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	82
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	83 /* This is what we store in our internal->decoder_private field. */
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	84 typedef struct
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	85 {
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	86 FLAC__StreamDecoder *decoder;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	87 SDL_RWops *rw;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	88 Sound_Sample *sample;
231 d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	89 Uint32 data_starting_offset;
155 72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	90 Uint32 frame_size;
166 d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	91 Uint8 is_flac;
155 72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	92 } flac_t;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	93
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	94
166 d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	95 static void free_flac(flac_t *f)
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	96 {
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	97 FLAC__stream_decoder_finish(f->decoder);
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	98 FLAC__stream_decoder_delete(f->decoder);
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	99 free(f);
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	100 } /* free_flac */
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	101
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	102
155 72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	103 static FLAC__StreamDecoderReadStatus FLAC_read_callback(
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	104 const FLAC__StreamDecoder *decoder, FLAC__byte buffer[],
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	105 unsigned int bytes, void client_data)
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	106 {
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	107 flac_t f = (flac_t ) client_data;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	108 Uint32 retval;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	109
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	110 #if 0
164 77482005beb6 Now includes FLAC/stream_decoder.h instead of FLAC/all.h. More robust Ryan C. Gordon <icculus@icculus.org> parents: 155 diff changeset	111 SNDDBG(("FLAC: Read callback.\n"));
155 72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	112 #endif
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	113
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	114 retval = SDL_RWread(f->rw, (Uint8 ) buffer, 1, bytes);
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	115
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	116 if (retval == 0)
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	117 {
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	118 *bytes = 0;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	119 f->sample->flags \|= SOUND_SAMPLEFLAG_EOF;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	120 return(FLAC__STREAM_DECODER_READ_END_OF_STREAM);
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	121 } /* if */
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	122
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	123 if (retval == -1)
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	124 {
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	125 *bytes = 0;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	126 f->sample->flags \|= SOUND_SAMPLEFLAG_ERROR;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	127 return(FLAC__STREAM_DECODER_READ_ABORT);
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	128 } /* if */
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	129
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	130 if (retval < *bytes)
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	131 {
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	132 *bytes = retval;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	133 f->sample->flags \|= SOUND_SAMPLEFLAG_EAGAIN;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	134 } /* if */
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	135
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	136 return(FLAC__STREAM_DECODER_READ_CONTINUE);
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	137 } /* FLAC_read_callback */
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	138
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	139
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	140 static FLAC__StreamDecoderWriteStatus FLAC_write_callback(
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	141 const FLAC__StreamDecoder decoder, const FLAC__Frame frame,
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	142 const FLAC__int32 buffer[], void client_data)
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	143 {
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	144 flac_t f = (flac_t ) client_data;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	145 Uint32 i, j;
166 d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	146 Uint32 sample;
155 72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	147 Uint8 *dst;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	148
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	149 #if 0
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	150 SNDDBG(("FLAC: Write callback.\n"));
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	151 #endif
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	152
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	153 f->frame_size = frame->header.channels * frame->header.blocksize
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	154 * frame->header.bits_per_sample / 8;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	155
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	156 if (f->frame_size > f->sample->buffer_size)
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	157 Sound_SetBufferSize(f->sample, f->frame_size);
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	158
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	159 dst = f->sample->buffer;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	160
166 d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	161 /* If the sample is neither exactly 8-bit nor 16-bit, it will have to
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	162 * be converted. Unfortunately the buffer is read-only, so we either
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	163 * have to check for each sample, or make a copy of the buffer. I'm
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	164 * not sure which way is best, so I've arbitrarily picked the former.
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	165 */
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	166 if (f->sample->actual.format == AUDIO_S8)
155 72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	167 {
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	168 for (i = 0; i < frame->header.blocksize; i++)
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	169 for (j = 0; j < frame->header.channels; j++)
166 d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	170 {
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	171 sample = buffer[j][i];
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	172 if (frame->header.bits_per_sample < 8)
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	173 sample <<= (8 - frame->header.bits_per_sample);
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	174 *dst++ = sample & 0x00ff;
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	175 } /* for */
155 72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	176 } /* if */
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	177 else
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	178 {
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	179 for (i = 0; i < frame->header.blocksize; i++)
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	180 for (j = 0; j < frame->header.channels; j++)
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	181 {
166 d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	182 sample = buffer[j][i];
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	183 if (frame->header.bits_per_sample < 16)
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	184 sample <<= (16 - frame->header.bits_per_sample);
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	185 else if (frame->header.bits_per_sample > 16)
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	186 sample >>= (frame->header.bits_per_sample - 16);
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	187 *dst++ = (sample & 0xff00) >> 8;
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	188 *dst++ = sample & 0x00ff;
155 72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	189 } /* for */
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	190 } /* else */
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	191
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	192 return(FLAC__STREAM_DECODER_WRITE_CONTINUE);
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	193 } /* FLAC_write_callback */
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	194
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	195
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	196 void FLAC_metadata_callback(
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	197 const FLAC__StreamDecoder decoder, const FLAC__StreamMetaData metadata,
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	198 void *client_data)
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	199 {
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	200 flac_t f = (flac_t ) client_data;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	201
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	202 SNDDBG(("FLAC: Metadata callback.\n"));
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	203
166 d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	204 /* There are several kinds of metadata, but STREAMINFO is the only
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	205 * one that always has to be there.
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	206 */
155 72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	207 if (metadata->type == FLAC__METADATA_TYPE_STREAMINFO)
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	208 {
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	209 SNDDBG(("FLAC: Metadata is streaminfo.\n"));
166 d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	210
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	211 f->is_flac = 1;
155 72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	212 f->sample->actual.channels = metadata->data.stream_info.channels;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	213 f->sample->actual.rate = metadata->data.stream_info.sample_rate;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	214
166 d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	215 if (metadata->data.stream_info.bits_per_sample > 8)
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	216 f->sample->actual.format = AUDIO_S16MSB;
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	217 else
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	218 f->sample->actual.format = AUDIO_S8;
155 72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	219 } /* if */
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	220 } /* FLAC_metadata_callback */
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	221
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	222
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	223 void FLAC_error_callback(
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	224 const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status,
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	225 void *client_data)
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	226 {
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	227 flac_t f = (flac_t ) client_data;
164 77482005beb6 Now includes FLAC/stream_decoder.h instead of FLAC/all.h. More robust Ryan C. Gordon <icculus@icculus.org> parents: 155 diff changeset	228
166 d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	229 /* !!! FIXME: Is every error really fatal? I don't know... */
164 77482005beb6 Now includes FLAC/stream_decoder.h instead of FLAC/all.h. More robust Ryan C. Gordon <icculus@icculus.org> parents: 155 diff changeset	230 Sound_SetError(FLAC__StreamDecoderErrorStatusString[status]);
155 72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	231 f->sample->flags \|= SOUND_SAMPLEFLAG_ERROR;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	232 } /* FLAC_error_callback */
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	233
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	234
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	235 static int FLAC_init(void)
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	236 {
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	237 return(1); /* always succeeds. */
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	238 } /* FLAC_init */
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	239
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	240
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	241 static void FLAC_quit(void)
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	242 {
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	243 /* it's a no-op. */
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	244 } /* FLAC_quit */
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	245
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	246
182 3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	247 #define FLAC_MAGIC 0x43614C66 /* "fLaC" in ASCII. */
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	248
155 72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	249 static int FLAC_open(Sound_Sample sample, const char ext)
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	250 {
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	251 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	252 SDL_RWops *rw = internal->rw;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	253 FLAC__StreamDecoder *decoder;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	254 flac_t *f;
166 d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	255 int i;
182 3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	256 int has_extension = 0;
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	257
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	258 /*
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	259 * If the extension is "flac", we'll believe that this is really meant
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	260 * to be a FLAC stream, and will try to grok it from existing metadata.
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	261 * metadata searching can be a very expensive operation, however, so
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	262 * unless the user swears that it is a FLAC stream through the extension,
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	263 * we decide what to do based on the existance of a 32-bit magic number.
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	264 */
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	265 for (i = 0; extensions_flac[i] != NULL; i++)
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	266 {
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	267 if (__Sound_strcasecmp(ext, extensions_flac[i]) == 0)
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	268 {
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	269 has_extension = 1;
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	270 break;
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	271 } /* if */
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	272 } /* for */
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	273
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	274 if (!has_extension)
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	275 {
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	276 int rc;
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	277 Uint32 flac_magic = SDL_ReadLE32(rw);
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	278 BAIL_IF_MACRO(flac_magic != FLAC_MAGIC, "FLAC: Not a FLAC stream.", 0);
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	279
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	280 /* move back over magic number for metadata scan... */
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	281 rc = SDL_RWseek(internal->rw, -sizeof (flac_magic), SEEK_CUR);
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	282 BAIL_IF_MACRO(rc < 0, ERR_IO_ERROR, 0);
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	283 } /* if */
155 72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	284
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	285 f = (flac_t *) malloc(sizeof (flac_t));
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	286 BAIL_IF_MACRO(f == NULL, ERR_OUT_OF_MEMORY, 0);
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	287
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	288 decoder = FLAC__stream_decoder_new();
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	289 if (decoder == NULL)
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	290 {
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	291 Sound_SetError(ERR_OUT_OF_MEMORY);
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	292 free(f);
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	293 return(0);
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	294 } /* if */
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	295
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	296 FLAC__stream_decoder_set_read_callback(decoder, FLAC_read_callback);
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	297 FLAC__stream_decoder_set_write_callback(decoder, FLAC_write_callback);
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	298 FLAC__stream_decoder_set_metadata_callback(decoder, FLAC_metadata_callback);
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	299 FLAC__stream_decoder_set_error_callback(decoder, FLAC_error_callback);
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	300 FLAC__stream_decoder_set_client_data(decoder, f);
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	301
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	302 f->rw = internal->rw;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	303 f->sample = sample;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	304 f->decoder = decoder;
164 77482005beb6 Now includes FLAC/stream_decoder.h instead of FLAC/all.h. More robust Ryan C. Gordon <icculus@icculus.org> parents: 155 diff changeset	305 f->sample->actual.format = 0;
182 3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	306 f->is_flac = 0 /* !!! FIXME: should be "has_extension", not "0". */;
166 d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	307
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	308 internal->decoder_private = f;
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	309 FLAC__stream_decoder_init(decoder);
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	310
182 3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	311 /*
231 d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	312 * Annoyingly, the rewind method will put the FLAC decoder in a state
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	313 * where it expects to read metadata, so we have to set this marker
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	314 * before the metadata block.
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	315 */
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	316 f->data_starting_offset = SDL_RWtell(f->rw);
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	317
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	318 /*
182 3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	319 * If we are not sure this is a FLAC stream, check for the STREAMINFO
166 d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	320 * metadata block. If not, we'd have to peek at the first audio frame
182 3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	321 * and get the sound format from there, but that is not yet
3849438b735e Checks magic number again, unless the file extension is recognized. Ryan C. Gordon <icculus@icculus.org> parents: 166 diff changeset	322 * implemented.
166 d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	323 */
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	324 if (!f->is_flac)
155 72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	325 {
166 d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	326 FLAC__stream_decoder_process_metadata(decoder);
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	327
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	328 /* Still not FLAC? Give up. */
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	329 if (!f->is_flac)
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	330 {
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	331 Sound_SetError("FLAC: No metadata found. Not a FLAC stream?");
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	332 free_flac(f);
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	333 return(0);
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	334 } /* if */
155 72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	335 } /* if */
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	336
164 77482005beb6 Now includes FLAC/stream_decoder.h instead of FLAC/all.h. More robust Ryan C. Gordon <icculus@icculus.org> parents: 155 diff changeset	337 SNDDBG(("FLAC: Accepting data stream.\n"));
77482005beb6 Now includes FLAC/stream_decoder.h instead of FLAC/all.h. More robust Ryan C. Gordon <icculus@icculus.org> parents: 155 diff changeset	338
155 72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	339 sample->flags = SOUND_SAMPLEFLAG_NONE;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	340 return(1);
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	341 } /* FLAC_open */
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	342
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	343
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	344 static void FLAC_close(Sound_Sample *sample)
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	345 {
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	346 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	347 flac_t f = (flac_t ) internal->decoder_private;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	348
166 d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson. Ryan C. Gordon <icculus@icculus.org> parents: 164 diff changeset	349 free_flac(f);
155 72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	350 } /* FLAC_close */
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	351
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	352
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	353 static Uint32 FLAC_read(Sound_Sample *sample)
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	354 {
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	355 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	356 flac_t f = (flac_t ) internal->decoder_private;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	357 Uint32 len;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	358
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	359 if (!FLAC__stream_decoder_process_one_frame(f->decoder))
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	360 {
164 77482005beb6 Now includes FLAC/stream_decoder.h instead of FLAC/all.h. More robust Ryan C. Gordon <icculus@icculus.org> parents: 155 diff changeset	361 Sound_SetError("FLAC: Couldn't decode frame.");
155 72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	362 sample->flags \|= SOUND_SAMPLEFLAG_ERROR;
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	363 return(0);
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	364 } /* if */
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	365
231 d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	366 if (FLAC__stream_decoder_get_state(f->decoder) == FLAC__STREAM_DECODER_END_OF_STREAM)
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	367 {
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	368 sample->flags \|= SOUND_SAMPLEFLAG_EOF;
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	369 return(0);
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	370 } /* if */
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	371
164 77482005beb6 Now includes FLAC/stream_decoder.h instead of FLAC/all.h. More robust Ryan C. Gordon <icculus@icculus.org> parents: 155 diff changeset	372 /* An error may have been signalled through the error callback. */
77482005beb6 Now includes FLAC/stream_decoder.h instead of FLAC/all.h. More robust Ryan C. Gordon <icculus@icculus.org> parents: 155 diff changeset	373 if (sample->flags & SOUND_SAMPLEFLAG_ERROR)
77482005beb6 Now includes FLAC/stream_decoder.h instead of FLAC/all.h. More robust Ryan C. Gordon <icculus@icculus.org> parents: 155 diff changeset	374 return(0);
231 d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	375
155 72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	376 return(f->frame_size);
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	377 } /* FLAC_read */
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	378
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	379
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	380 static int FLAC_rewind(Sound_Sample *sample)
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	381 {
231 d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	382 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	383 flac_t f = (flac_t ) internal->decoder_private;
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	384 int rc = SDL_RWseek(f->rw, f->data_starting_offset, SEEK_SET);
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	385
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	386 BAIL_IF_MACRO(rc != f->data_starting_offset, ERR_IO_ERROR, 0);
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	387 BAIL_IF_MACRO(!FLAC__stream_decoder_reset(f->decoder),
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	388 "FLAC: could not reset decoder", 0);
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	389 FLAC__stream_decoder_process_metadata(f->decoder);
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	390 return(1);
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	391 } /* FLAC_rewind */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	392
155 72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	393 #endif /* SOUND_SUPPORTS_FLAC */
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	394
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	395
72ff7d3a25b6 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	396 /* end of flac.c ... */

Mercurial > SDL_sound_CoreAudio

annotate decoders/flac.c @ 231:d3dc34315ac7