SDL_sound_CoreAudio: decoders/au.c annotate

annotate decoders/au.c @ 330:a81976ed5df7

Cleanups for robustness, potentially buggy seek method implementation.

author	Ryan C. Gordon <icculus@icculus.org>
date	Mon, 20 May 2002 09:22:42 +0000
parents	c97be6e1bd27
children	e683cb99f88f

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 #include <assert.h>
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	40
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	41 #include "SDL_sound.h"
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	42
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	43 #define __SDL_SOUND_INTERNAL__
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	44 #include "SDL_sound_internal.h"
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	45
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	46 static int AU_init(void);
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	47 static void AU_quit(void);
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	48 static int AU_open(Sound_Sample sample, const char ext);
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	49 static void AU_close(Sound_Sample *sample);
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	50 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	51 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	52 static int AU_seek(Sound_Sample *sample, Uint32 ms);
213 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 /*
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	55 * 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	56 * 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	57 * 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	58 */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	59 static const char *extensions_au[] = { "AU", NULL };
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	60 const Sound_DecoderFunctions __Sound_DecoderFunctions_AU =
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 {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	63 extensions_au,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	64 "Sun/NeXT audio file format",
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	65 "Mattias Engdeg�rd <f91-men@nada.kth.se>",
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	66 "http://www.icculus.org/SDL_sound/"
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	67 },
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	68
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	69 AU_init, /* init() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	70 AU_quit, /* quit() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	71 AU_open, /* open() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	72 AU_close, /* close() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	73 AU_read, /* read() method */
306 c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 294 diff changeset	74 AU_rewind, /* rewind() method */
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 294 diff changeset	75 AU_seek /* seek() method */
213 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
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	78 /* no init/deinit needed */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	79 static int AU_init(void)
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	80 {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	81 return(1);
217 9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	82 } /* AU_init */
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	83
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	84 static void AU_quit(void)
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	85 {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	86 /* no-op. */
217 9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	87 } /* AU_quit */
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	88
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	89 struct au_file_hdr
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	90 {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	91 Uint32 magic;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	92 Uint32 hdr_size;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	93 Uint32 data_size;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	94 Uint32 encoding;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	95 Uint32 sample_rate;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	96 Uint32 channels;
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
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	99 #define HDR_SIZE 24
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	100
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	101 enum
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	102 {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	103 AU_ENC_ULAW_8 = 1, /* 8-bit ISDN �-law */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	104 AU_ENC_LINEAR_8 = 2, /* 8-bit linear PCM */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	105 AU_ENC_LINEAR_16 = 3, /* 16-bit linear PCM */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	106
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	107 /* the rest are unsupported (I have never seen them in the wild) */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	108 AU_ENC_LINEAR_24 = 4, /* 24-bit linear PCM */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	109 AU_ENC_LINEAR_32 = 5, /* 32-bit linear PCM */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	110 AU_ENC_FLOAT = 6, /* 32-bit IEEE floating point */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	111 AU_ENC_DOUBLE = 7, /* 64-bit IEEE floating point */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	112 /* more Sun formats, not supported either */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	113 AU_ENC_ADPCM_G721 = 23,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	114 AU_ENC_ADPCM_G722 = 24,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	115 AU_ENC_ADPCM_G723_3 = 25,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	116 AU_ENC_ADPCM_G723_5 = 26,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	117 AU_ENC_ALAW_8 = 27
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
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	120 struct audec
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	121 {
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	122 Uint32 total;
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	123 Uint32 remaining;
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	124 Uint32 start_offset;
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	125 int encoding;
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
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	128
330 a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	129 /*
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	130 * 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	131 * 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	132 * structure is packed.
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	133 */
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	134 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	135 {
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	136 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	137 return(0);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	138 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	139
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	140 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	141 return(0);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	142 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	143
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	144 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	145 return(0);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	146 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	147
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	148 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	149 return(0);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	150 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	151
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	152 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	153 return(0);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	154 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	155
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	156 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	157 return(0);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	158 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	159
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	160 return(1);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	161 } /* read_au_header */
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	162
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	163
257 7c4f6ee02cd0 Changed magic number to be bigendian. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	164 #define AU_MAGIC 0x2E736E64 /* ".snd", in ASCII (bigendian number) */
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	165
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	166 static int AU_open(Sound_Sample sample, const char ext)
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	167 {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	168 Sound_SampleInternal *internal = sample->opaque;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	169 SDL_RWops *rw = internal->rw;
330 a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	170 int skip, hsize, i;
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	171 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	172 struct audec *dec;
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	173 char c;
330 a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	174
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	175 if (!read_au_header(rw, &hdr)) /* does byte order swapping. */
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 Sound_SetError("AU: Not an .au file (bad header)");
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	178 return(0);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	179 } /* if */
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	180
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	181 dec = malloc(sizeof *dec);
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	182 BAIL_IF_MACRO(dec == NULL, ERR_OUT_OF_MEMORY, 0);
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	183 internal->decoder_private = dec;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	184
330 a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	185 if (hdr.magic == AU_MAGIC)
213 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 /* valid magic */
330 a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	188 dec->encoding = hdr.encoding;
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	189 switch(dec->encoding)
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	190 {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	191 case AU_ENC_ULAW_8:
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	192 /* 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	193 slightly wasteful if the audio driver must convert them
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	194 back, but �-law only devices are rare (mostly _old_ Suns) */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	195 sample->actual.format = AUDIO_S16SYS;
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_8:
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	199 sample->actual.format = AUDIO_S8;
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 case AU_ENC_LINEAR_16:
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	203 sample->actual.format = AUDIO_S16MSB;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	204 break;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	205
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	206 default:
294 9828311da44b Minor cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 257 diff changeset	207 Sound_SetError("AU: Unsupported .au encoding");
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	208 free(dec);
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	209 return 0;
217 9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	210 } /* switch */
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	211
330 a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	212 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	213 sample->actual.channels = hdr.channels;
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	214 dec->remaining = hdr.data_size;
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	215 hsize = hdr.hdr_size;
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	216
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	217 /* skip remaining part of header (input may be unseekable) */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	218 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	219 {
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	220 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	221 {
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	222 free(dec);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	223 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	224 } /* if */
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	225 } /* for */
217 9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	226 } /* if */
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	227
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	228 else if (__Sound_strcasecmp(ext, "au") == 0)
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 * 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	232 * header; these are traditionally assumed to be 8kHz �-law. Handle
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	233 * them here only if the extension is recognized.
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	234 */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	235
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	236 SNDDBG(("AU: Invalid header, assuming raw 8kHz �-law.\n"));
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	237 /* if seeking fails, we lose 24 samples. big deal */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	238 SDL_RWseek(rw, -HDR_SIZE, SEEK_CUR);
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	239 dec->encoding = AU_ENC_ULAW_8;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	240 dec->remaining = (Uint32)-1; /* no limit */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	241 sample->actual.format = AUDIO_S16SYS;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	242 sample->actual.rate = 8000;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	243 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	244 } /* else if */
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	245
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	246 else
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	247 {
294 9828311da44b Minor cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 257 diff changeset	248 Sound_SetError("AU: Not an .AU stream.");
217 9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	249 free(dec);
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	250 return(0);
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	251 } /* else */
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	252
330 a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	253 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	254 dec->total = dec->remaining;
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	255 dec->start_offset = SDL_RWtell(rw);
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	256
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	257 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	258 return(1);
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	259 } /* AU_open */
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	260
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 static void AU_close(Sound_Sample *sample)
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	263 {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	264 Sound_SampleInternal *internal = sample->opaque;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	265 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	266 } /* AU_close */
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	267
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	268
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	269 /* table to convert from �-law encoding to signed 16-bit samples,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	270 generated by a throwaway perl script */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	271 static Sint16 ulaw_to_linear[256] = {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	272 -32124,-31100,-30076,-29052,-28028,-27004,-25980,-24956,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	273 -23932,-22908,-21884,-20860,-19836,-18812,-17788,-16764,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	274 -15996,-15484,-14972,-14460,-13948,-13436,-12924,-12412,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	275 -11900,-11388,-10876,-10364, -9852, -9340, -8828, -8316,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	276 -7932, -7676, -7420, -7164, -6908, -6652, -6396, -6140,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	277 -5884, -5628, -5372, -5116, -4860, -4604, -4348, -4092,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	278 -3900, -3772, -3644, -3516, -3388, -3260, -3132, -3004,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	279 -2876, -2748, -2620, -2492, -2364, -2236, -2108, -1980,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	280 -1884, -1820, -1756, -1692, -1628, -1564, -1500, -1436,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	281 -1372, -1308, -1244, -1180, -1116, -1052, -988, -924,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	282 -876, -844, -812, -780, -748, -716, -684, -652,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	283 -620, -588, -556, -524, -492, -460, -428, -396,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	284 -372, -356, -340, -324, -308, -292, -276, -260,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	285 -244, -228, -212, -196, -180, -164, -148, -132,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	286 -120, -112, -104, -96, -88, -80, -72, -64,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	287 -56, -48, -40, -32, -24, -16, -8, 0,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	288 32124, 31100, 30076, 29052, 28028, 27004, 25980, 24956,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	289 23932, 22908, 21884, 20860, 19836, 18812, 17788, 16764,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	290 15996, 15484, 14972, 14460, 13948, 13436, 12924, 12412,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	291 11900, 11388, 10876, 10364, 9852, 9340, 8828, 8316,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	292 7932, 7676, 7420, 7164, 6908, 6652, 6396, 6140,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	293 5884, 5628, 5372, 5116, 4860, 4604, 4348, 4092,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	294 3900, 3772, 3644, 3516, 3388, 3260, 3132, 3004,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	295 2876, 2748, 2620, 2492, 2364, 2236, 2108, 1980,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	296 1884, 1820, 1756, 1692, 1628, 1564, 1500, 1436,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	297 1372, 1308, 1244, 1180, 1116, 1052, 988, 924,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	298 876, 844, 812, 780, 748, 716, 684, 652,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	299 620, 588, 556, 524, 492, 460, 428, 396,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	300 372, 356, 340, 324, 308, 292, 276, 260,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	301 244, 228, 212, 196, 180, 164, 148, 132,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	302 120, 112, 104, 96, 88, 80, 72, 64,
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	303 56, 48, 40, 32, 24, 16, 8, 0
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	304 };
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	305
217 9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	306
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	307 static Uint32 AU_read(Sound_Sample *sample)
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	308 {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	309 int ret;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	310 Sound_SampleInternal *internal = sample->opaque;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	311 struct audec *dec = internal->decoder_private;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	312 int maxlen;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	313 Uint8 *buf;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	314
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	315 maxlen = internal->buffer_size;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	316 buf = internal->buffer;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	317 if (dec->encoding == AU_ENC_ULAW_8)
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	318 {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	319 /* We read �-law samples into the second half of the buffer, so
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	320 we can expand them to 16-bit samples afterwards */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	321 maxlen >>= 1;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	322 buf += maxlen;
217 9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	323 } /* if */
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	324
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	325 if (maxlen > dec->remaining)
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	326 maxlen = dec->remaining;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	327 ret = SDL_RWread(internal->rw, buf, 1, maxlen);
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	328 if (ret == 0)
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	329 sample->flags \|= SOUND_SAMPLEFLAG_EOF;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	330 else if (ret == -1)
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	331 sample->flags \|= SOUND_SAMPLEFLAG_ERROR;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	332 else
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	333 {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	334 dec->remaining -= ret;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	335 if (ret < maxlen)
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	336 sample->flags \|= SOUND_SAMPLEFLAG_EAGAIN;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	337
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	338 if (dec->encoding == AU_ENC_ULAW_8)
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	339 {
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	340 int i;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	341 Sint16 *dst = internal->buffer;
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	342 for (i = 0; i < ret; i++)
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	343 dst[i] = ulaw_to_linear[buf[i]];
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	344 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	345 } /* if */
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	346 } /* else */
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	347
217 9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	348 return(ret);
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :) Ryan C. Gordon <icculus@icculus.org> parents: 213 diff changeset	349 } /* AU_read */
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	350
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	351
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	352 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	353 {
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	354 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	355 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	356 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	357 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	358 dec->remaining = dec->total;
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	359 return(1);
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	360 } /* AU_rewind */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 217 diff changeset	361
306 c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 294 diff changeset	362
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 294 diff changeset	363 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	364 {
330 a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	365 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	366 struct audec dec = (struct audec ) internal->decoder_private;
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	367 int offset = dec->start_offset;
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	368 int frames = (int) (((float) sample->actual.rate / 1000.0) * ((float) ms));
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	369 int points = (int) (frames * sample->actual.channels);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	370 int rc;
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	371
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	372 SNDDBG(("WARNING: AU_seek() may be buggy.\n")); /* !!! FIXME : remove this. */
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	373
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	374 switch (dec->encoding)
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	375 {
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	376 case AU_ENC_ULAW_8: /* halve the byte offset for compression. */
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	377 SNDDBG(("uLaw8 encoding\n")); /* !!! FIXME : remove this. */
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	378 offset += ((sizeof (Uint8) * points) >> 1);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	379 break;
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	380
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	381 case AU_ENC_LINEAR_8:
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	382 SNDDBG(("linear8 encoding\n")); /* !!! FIXME : remove this. */
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	383 offset += (sizeof (Uint8) * points);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	384 break;
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	385
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	386 case AU_ENC_LINEAR_16:
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	387 SNDDBG(("linear16 encoding\n")); /* !!! FIXME : remove this. */
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	388 offset += (sizeof (Uint16) * points);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	389 break;
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	390
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	391 default:
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	392 BAIL_MACRO("Unexpected format. Something is very wrong.", 0);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	393 break;
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	394 } /* switch */
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	395
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	396 SNDDBG(("Seek to %d (edge is %d).\n", (int) offset, (int) dec->total));
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	397
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	398 BAIL_IF_MACRO(offset >= dec->total, ERR_IO_ERROR, 0); /* seek past end? */
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	399
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	400 rc = SDL_RWseek(internal->rw, offset, SEEK_SET);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	401 BAIL_IF_MACRO(rc != offset, ERR_IO_ERROR, 0);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	402 dec->remaining = dec->total - (offset - 2);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	403 return(1);
306 c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 294 diff changeset	404 } /* AU_seek */
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 294 diff changeset	405
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	406 #endif /* SOUND_SUPPORTS_AU */
948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	407

Mercurial > SDL_sound_CoreAudio

annotate decoders/au.c @ 330:a81976ed5df7