SDL_sound_CoreAudio: decoders/au.c annotate

annotate decoders/au.c @ 480:00b61987b555

Fixed logic bug in .voc decoder that caused crash at open time.

author	Ryan C. Gordon <icculus@icculus.org>
date	Fri, 12 Nov 2004 08:21:04 +0000
parents	3e705c9180e5
children	8a814bbbedfa

rev	line source
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	1 /*
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	2 * SDL_sound -- An abstract sound format decoding API.
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	3 * Copyright (C) 2001 Ryan C. Gordon.
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	4 *
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	5 * This library is free software; you can redistribute it and/or
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	6 * modify it under the terms of the GNU Lesser General Public
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	7 * License as published by the Free Software Foundation; either
948b62500a54 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.
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	9 *
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	10 * This library is distributed in the hope that it will be useful,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	13 * Lesser General Public License for more details.
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	14 *
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	15 * You should have received a copy of the GNU Lesser General Public
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	16 * License along with this library; if not, write to the Free Software
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	18 */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	19
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	20 /*
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	21 * Sun/NeXT .au decoder for SDL_sound.
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	22 * Formats supported: 8 and 16 bit linear PCM, 8 bit �-law.
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	23 * Files without valid header are assumed to be 8 bit �-law, 8kHz, mono.
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	24 *
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	25 * Please see the file COPYING in the source's root directory.
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	26 *
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	27 * This file written by Mattias Engdeg�rd. (f91-men@nada.kth.se)
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	28 */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	29
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	30 #if HAVE_CONFIG_H
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	31 # include <config.h>
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	32 #endif
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	33
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	34 #ifdef SOUND_SUPPORTS_AU
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	35
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	36 #include <stdio.h>
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	37 #include <stdlib.h>
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	38 #include <string.h>
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	39
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	40 #include "SDL_sound.h"
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	41
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	42 #define __SDL_SOUND_INTERNAL__
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	43 #include "SDL_sound_internal.h"
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	44
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	45 static int AU_init(void);
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	46 static void AU_quit(void);
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	47 static int AU_open(Sound_Sample sample, const char ext);
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	48 static void AU_close(Sound_Sample *sample);
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	49 static Uint32 AU_read(Sound_Sample *sample);
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	50 static int AU_rewind(Sound_Sample *sample);
306 c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 294 diff changeset	51 static int AU_seek(Sound_Sample *sample, Uint32 ms);
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	52
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	53 /*
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	54 * Sometimes the extension ".snd" is used for these files (mostly on the NeXT),
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	55 * and the magic number comes from this. However it may clash with other
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	56 * formats and is somewhat of an anachronism, so only .au is used here.
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	57 */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	58 static const char *extensions_au[] = { "AU", NULL };
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	59 const Sound_DecoderFunctions __Sound_DecoderFunctions_AU =
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	60 {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	61 {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	62 extensions_au,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	63 "Sun/NeXT audio file format",
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	64 "Mattias Engdeg�rd <f91-men@nada.kth.se>",
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	65 "http://www.icculus.org/SDL_sound/"
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	66 },
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	67
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	68 AU_init, /* init() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	69 AU_quit, /* quit() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	70 AU_open, /* open() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	71 AU_close, /* close() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	72 AU_read, /* read() method */
306 c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 294 diff changeset	73 AU_rewind, /* rewind() method */
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 294 diff changeset	74 AU_seek /* seek() method */
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	75 };
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	76
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	77 /* no init/deinit needed */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	78 static int AU_init(void)
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	79 {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	80 return(1);
217 9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	81 } /* AU_init */
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	82
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	83 static void AU_quit(void)
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	84 {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	85 /* no-op. */
217 9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	86 } /* AU_quit */
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	87
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	88 struct au_file_hdr
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	89 {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	90 Uint32 magic;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	91 Uint32 hdr_size;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	92 Uint32 data_size;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	93 Uint32 encoding;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	94 Uint32 sample_rate;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	95 Uint32 channels;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	96 };
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	97
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	98 #define HDR_SIZE 24
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	99
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	100 enum
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	101 {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	102 AU_ENC_ULAW_8 = 1, /* 8-bit ISDN �-law */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	103 AU_ENC_LINEAR_8 = 2, /* 8-bit linear PCM */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	104 AU_ENC_LINEAR_16 = 3, /* 16-bit linear PCM */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	105
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	106 /* the rest are unsupported (I have never seen them in the wild) */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	107 AU_ENC_LINEAR_24 = 4, /* 24-bit linear PCM */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	108 AU_ENC_LINEAR_32 = 5, /* 32-bit linear PCM */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	109 AU_ENC_FLOAT = 6, /* 32-bit IEEE floating point */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	110 AU_ENC_DOUBLE = 7, /* 64-bit IEEE floating point */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	111 /* more Sun formats, not supported either */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	112 AU_ENC_ADPCM_G721 = 23,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	113 AU_ENC_ADPCM_G722 = 24,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	114 AU_ENC_ADPCM_G723_3 = 25,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	115 AU_ENC_ADPCM_G723_5 = 26,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	116 AU_ENC_ALAW_8 = 27
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	117 };
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	118
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	119 struct audec
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	120 {
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	121 Uint32 total;
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	122 Uint32 remaining;
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	123 Uint32 start_offset;
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	124 int encoding;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	125 };
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	126
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	127
330 a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	128 /*
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	129 * Read in the AU header from disk. This makes this process safe
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	130 * regardless of the processor's byte order or how the au_file_hdr
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	131 * structure is packed.
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	132 */
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	133 static int read_au_header(SDL_RWops rw, struct au_file_hdr hdr)
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	134 {
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	135 if (SDL_RWread(rw, &hdr->magic, sizeof (hdr->magic), 1) != 1)
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	136 return(0);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	137 hdr->magic = SDL_SwapBE32(hdr->magic);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	138
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	139 if (SDL_RWread(rw, &hdr->hdr_size, sizeof (hdr->hdr_size), 1) != 1)
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	140 return(0);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	141 hdr->hdr_size = SDL_SwapBE32(hdr->hdr_size);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	142
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	143 if (SDL_RWread(rw, &hdr->data_size, sizeof (hdr->data_size), 1) != 1)
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	144 return(0);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	145 hdr->data_size = SDL_SwapBE32(hdr->data_size);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	146
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	147 if (SDL_RWread(rw, &hdr->encoding, sizeof (hdr->encoding), 1) != 1)
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	148 return(0);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	149 hdr->encoding = SDL_SwapBE32(hdr->encoding);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	150
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	151 if (SDL_RWread(rw, &hdr->sample_rate, sizeof (hdr->sample_rate), 1) != 1)
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	152 return(0);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	153 hdr->sample_rate = SDL_SwapBE32(hdr->sample_rate);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	154
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	155 if (SDL_RWread(rw, &hdr->channels, sizeof (hdr->channels), 1) != 1)
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	156 return(0);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	157 hdr->channels = SDL_SwapBE32(hdr->channels);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	158
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	159 return(1);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	160 } /* read_au_header */
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	161
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	162
257 7c4f6ee02cd0 Changed magic number to be bigendian. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	163 #define AU_MAGIC 0x2E736E64 /* ".snd", in ASCII (bigendian number) */
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	164
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	165 static int AU_open(Sound_Sample sample, const char ext)
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	166 {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	167 Sound_SampleInternal *internal = sample->opaque;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	168 SDL_RWops *rw = internal->rw;
474 c66080364dff Most decoders now report total sample play time, now. Technically, this Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	169 int skip, hsize, i, bytes_per_second;
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	170 struct au_file_hdr hdr;
330 a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	171 struct audec *dec;
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	172 char c;
330 a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	173
387 fb519e6028e3 Changed all the Sound_SetError() calls to __Sound_SetError (or BAIL_MACRO) Ryan C. Gordon <icculus@icculus.org>* parents: 377 diff changeset	174 /* read_au_header() will do byte order swapping. */
fb519e6028e3 Changed all the Sound_SetError() calls to __Sound_SetError (or BAIL_MACRO) Ryan C. Gordon <icculus@icculus.org>* parents: 377 diff changeset	175 BAIL_IF_MACRO(!read_au_header(rw, &hdr), "AU: bad header", 0);
330 a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	176
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	177 dec = malloc(sizeof *dec);
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	178 BAIL_IF_MACRO(dec == NULL, ERR_OUT_OF_MEMORY, 0);
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	179 internal->decoder_private = dec;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	180
330 a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	181 if (hdr.magic == AU_MAGIC)
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	182 {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	183 /* valid magic */
330 a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	184 dec->encoding = hdr.encoding;
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	185 switch(dec->encoding)
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	186 {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	187 case AU_ENC_ULAW_8:
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	188 /* Convert 8-bit �-law to 16-bit linear on the fly. This is
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	189 slightly wasteful if the audio driver must convert them
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	190 back, but �-law only devices are rare (mostly _old_ Suns) */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	191 sample->actual.format = AUDIO_S16SYS;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	192 break;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	193
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	194 case AU_ENC_LINEAR_8:
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	195 sample->actual.format = AUDIO_S8;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	196 break;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	197
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	198 case AU_ENC_LINEAR_16:
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	199 sample->actual.format = AUDIO_S16MSB;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	200 break;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	201
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	202 default:
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	203 free(dec);
387 fb519e6028e3 Changed all the Sound_SetError() calls to __Sound_SetError (or BAIL_MACRO) Ryan C. Gordon <icculus@icculus.org>* parents: 377 diff changeset	204 BAIL_MACRO("AU: Unsupported .au encoding", 0);
217 9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	205 } /* switch */
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	206
330 a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	207 sample->actual.rate = hdr.sample_rate;
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	208 sample->actual.channels = hdr.channels;
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	209 dec->remaining = hdr.data_size;
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	210 hsize = hdr.hdr_size;
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	211
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	212 /* skip remaining part of header (input may be unseekable) */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	213 for (i = HDR_SIZE; i < hsize; i++)
330 a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	214 {
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	215 if (SDL_RWread(rw, &c, 1, 1) != 1)
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	216 {
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	217 free(dec);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	218 BAIL_MACRO(ERR_IO_ERROR, 0);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	219 } /* if */
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	220 } /* for */
217 9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	221 } /* if */
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	222
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	223 else if (__Sound_strcasecmp(ext, "au") == 0)
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	224 {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	225 /*
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	226 * A number of files in the wild have the .au extension but no valid
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	227 * header; these are traditionally assumed to be 8kHz �-law. Handle
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	228 * them here only if the extension is recognized.
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	229 */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	230
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	231 SNDDBG(("AU: Invalid header, assuming raw 8kHz �-law.\n"));
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	232 /* if seeking fails, we lose 24 samples. big deal */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	233 SDL_RWseek(rw, -HDR_SIZE, SEEK_CUR);
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	234 dec->encoding = AU_ENC_ULAW_8;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	235 dec->remaining = (Uint32)-1; /* no limit */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	236 sample->actual.format = AUDIO_S16SYS;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	237 sample->actual.rate = 8000;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	238 sample->actual.channels = 1;
217 9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	239 } /* else if */
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	240
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	241 else
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	242 {
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	243 free(dec);
387 fb519e6028e3 Changed all the Sound_SetError() calls to __Sound_SetError (or BAIL_MACRO) Ryan C. Gordon <icculus@icculus.org>* parents: 377 diff changeset	244 BAIL_MACRO("AU: Not an .AU stream.", 0);
474 c66080364dff Most decoders now report total sample play time, now. Technically, this Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	245 } /* else */
c66080364dff Most decoders now report total sample play time, now. Technically, this Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	246
c66080364dff Most decoders now report total sample play time, now. Technically, this Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	247 bytes_per_second = ( ( dec->encoding == AU_ENC_LINEAR_16 ) ? 2 : 1 )
c66080364dff Most decoders now report total sample play time, now. Technically, this Ryan C. Gordon <icculus@icculus.org> parents: 387 diff changeset	248 * sample->actual.rate * sample->actual.channels ;
477 3e705c9180e5 Fixed binary compatibility, added Sound_GetDuration(). Ryan C. Gordon <icculus@icculus.org> parents: 474 diff changeset	249 internal->total_time = ((dec->remaining == -1) ? (-1) :
3e705c9180e5 Fixed binary compatibility, added Sound_GetDuration(). Ryan C. Gordon <icculus@icculus.org> parents: 474 diff changeset	250 ( ( dec->remaining / bytes_per_second ) * 1000 ) +
3e705c9180e5 Fixed binary compatibility, added Sound_GetDuration(). Ryan C. Gordon <icculus@icculus.org> parents: 474 diff changeset	251 ( ( dec->remaining % bytes_per_second ) * 1000 /
3e705c9180e5 Fixed binary compatibility, added Sound_GetDuration(). Ryan C. Gordon <icculus@icculus.org> parents: 474 diff changeset	252 bytes_per_second ) );
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	253
330 a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	254 sample->flags = SOUND_SAMPLEFLAG_CANSEEK;
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	255 dec->total = dec->remaining;
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	256 dec->start_offset = SDL_RWtell(rw);
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	257
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	258 SNDDBG(("AU: Accepting data stream.\n"));
217 9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	259 return(1);
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	260 } /* AU_open */
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	261
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	262
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	263 static void AU_close(Sound_Sample *sample)
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	264 {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	265 Sound_SampleInternal *internal = sample->opaque;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	266 free(internal->decoder_private);
217 9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	267 } /* AU_close */
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	268
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	269
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	270 /* table to convert from �-law encoding to signed 16-bit samples,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	271 generated by a throwaway perl script */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	272 static Sint16 ulaw_to_linear[256] = {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	273 -32124,-31100,-30076,-29052,-28028,-27004,-25980,-24956,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	274 -23932,-22908,-21884,-20860,-19836,-18812,-17788,-16764,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	275 -15996,-15484,-14972,-14460,-13948,-13436,-12924,-12412,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	276 -11900,-11388,-10876,-10364, -9852, -9340, -8828, -8316,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	277 -7932, -7676, -7420, -7164, -6908, -6652, -6396, -6140,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	278 -5884, -5628, -5372, -5116, -4860, -4604, -4348, -4092,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	279 -3900, -3772, -3644, -3516, -3388, -3260, -3132, -3004,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	280 -2876, -2748, -2620, -2492, -2364, -2236, -2108, -1980,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	281 -1884, -1820, -1756, -1692, -1628, -1564, -1500, -1436,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	282 -1372, -1308, -1244, -1180, -1116, -1052, -988, -924,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	283 -876, -844, -812, -780, -748, -716, -684, -652,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	284 -620, -588, -556, -524, -492, -460, -428, -396,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	285 -372, -356, -340, -324, -308, -292, -276, -260,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	286 -244, -228, -212, -196, -180, -164, -148, -132,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	287 -120, -112, -104, -96, -88, -80, -72, -64,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	288 -56, -48, -40, -32, -24, -16, -8, 0,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	289 32124, 31100, 30076, 29052, 28028, 27004, 25980, 24956,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	290 23932, 22908, 21884, 20860, 19836, 18812, 17788, 16764,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	291 15996, 15484, 14972, 14460, 13948, 13436, 12924, 12412,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	292 11900, 11388, 10876, 10364, 9852, 9340, 8828, 8316,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	293 7932, 7676, 7420, 7164, 6908, 6652, 6396, 6140,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	294 5884, 5628, 5372, 5116, 4860, 4604, 4348, 4092,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	295 3900, 3772, 3644, 3516, 3388, 3260, 3132, 3004,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	296 2876, 2748, 2620, 2492, 2364, 2236, 2108, 1980,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	297 1884, 1820, 1756, 1692, 1628, 1564, 1500, 1436,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	298 1372, 1308, 1244, 1180, 1116, 1052, 988, 924,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	299 876, 844, 812, 780, 748, 716, 684, 652,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	300 620, 588, 556, 524, 492, 460, 428, 396,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	301 372, 356, 340, 324, 308, 292, 276, 260,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	302 244, 228, 212, 196, 180, 164, 148, 132,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	303 120, 112, 104, 96, 88, 80, 72, 64,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	304 56, 48, 40, 32, 24, 16, 8, 0
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	305 };
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	306
217 9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	307
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	308 static Uint32 AU_read(Sound_Sample *sample)
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	309 {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	310 int ret;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	311 Sound_SampleInternal *internal = sample->opaque;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	312 struct audec *dec = internal->decoder_private;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	313 int maxlen;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	314 Uint8 *buf;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	315
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	316 maxlen = internal->buffer_size;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	317 buf = internal->buffer;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	318 if (dec->encoding == AU_ENC_ULAW_8)
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	319 {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	320 /* We read �-law samples into the second half of the buffer, so
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	321 we can expand them to 16-bit samples afterwards */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	322 maxlen >>= 1;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	323 buf += maxlen;
217 9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	324 } /* if */
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	325
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	326 if (maxlen > dec->remaining)
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	327 maxlen = dec->remaining;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	328 ret = SDL_RWread(internal->rw, buf, 1, maxlen);
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	329 if (ret == 0)
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	330 sample->flags \|= SOUND_SAMPLEFLAG_EOF;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	331 else if (ret == -1)
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	332 sample->flags \|= SOUND_SAMPLEFLAG_ERROR;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	333 else
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	334 {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	335 dec->remaining -= ret;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	336 if (ret < maxlen)
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	337 sample->flags \|= SOUND_SAMPLEFLAG_EAGAIN;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	338
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	339 if (dec->encoding == AU_ENC_ULAW_8)
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	340 {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	341 int i;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	342 Sint16 *dst = internal->buffer;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	343 for (i = 0; i < ret; i++)
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	344 dst[i] = ulaw_to_linear[buf[i]];
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	345 ret <<= 1; /* return twice as much as read */
217 9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	346 } /* if */
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	347 } /* else */
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	348
217 9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	349 return(ret);
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	350 } /* AU_read */
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	351
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	352
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	353 static int AU_rewind(Sound_Sample *sample)
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	354 {
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	355 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	356 struct audec dec = (struct audec ) internal->decoder_private;
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	357 int rc = SDL_RWseek(internal->rw, dec->start_offset, SEEK_SET);
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	358 BAIL_IF_MACRO(rc != dec->start_offset, ERR_IO_ERROR, 0);
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	359 dec->remaining = dec->total;
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	360 return(1);
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	361 } /* AU_rewind */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	362
306 c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 294 diff changeset	363
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 294 diff changeset	364 static int AU_seek(Sound_Sample *sample, Uint32 ms)
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 294 diff changeset	365 {
330 a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	366 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	367 struct audec dec = (struct audec ) internal->decoder_private;
331 e683cb99f88f Fixed seek implementation. Ryan C. Gordon <icculus@icculus.org> parents: 330 diff changeset	368 int offset = __Sound_convertMsToBytePos(&sample->actual, ms);
330 a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	369 int rc;
331 e683cb99f88f Fixed seek implementation. Ryan C. Gordon <icculus@icculus.org> parents: 330 diff changeset	370 int pos;
330 a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	371
331 e683cb99f88f Fixed seek implementation. Ryan C. Gordon <icculus@icculus.org> parents: 330 diff changeset	372 if (dec->encoding == AU_ENC_ULAW_8)
e683cb99f88f Fixed seek implementation. Ryan C. Gordon <icculus@icculus.org> parents: 330 diff changeset	373 offset >>= 1; /* halve the byte offset for compression. */
330 a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	374
331 e683cb99f88f Fixed seek implementation. Ryan C. Gordon <icculus@icculus.org> parents: 330 diff changeset	375 pos = (int) (dec->start_offset + offset);
e683cb99f88f Fixed seek implementation. Ryan C. Gordon <icculus@icculus.org> parents: 330 diff changeset	376 rc = SDL_RWseek(internal->rw, pos, SEEK_SET);
e683cb99f88f Fixed seek implementation. Ryan C. Gordon <icculus@icculus.org> parents: 330 diff changeset	377 BAIL_IF_MACRO(rc != pos, ERR_IO_ERROR, 0);
e683cb99f88f Fixed seek implementation. Ryan C. Gordon <icculus@icculus.org> parents: 330 diff changeset	378 dec->remaining = dec->total - offset;
330 a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	379 return(1);
306 c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 294 diff changeset	380 } /* AU_seek */
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 294 diff changeset	381
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	382 #endif /* SOUND_SUPPORTS_AU */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	383

Mercurial > SDL_sound_CoreAudio

annotate decoders/au.c @ 480:00b61987b555