SDL_sound_CoreAudio: decoders/au.c annotate

annotate decoders/au.c @ 562:7e08477b0fc1

MP3 decoder upgrade work. Ripped out SMPEG and mpglib support, replaced it with "mpg123.c" and libmpg123. libmpg123 is a much better version of mpglib, so it should solve all the problems about MP3's not seeking, or most modern MP3's not playing at all, etc. Since you no longer have to make a tradeoff with SMPEG for features, and SMPEG is basically rotting, I removed it from the project. There is still work to be done with libmpg123...there are MMX, 3DNow, SSE, Altivec, etc decoders which we don't have enabled at the moment, and the build system could use some work to make this compile more cleanly, etc. Still: huge win.

author	Ryan C. Gordon <icculus@icculus.org>
date	Fri, 30 Jan 2009 02:44:47 -0500
parents	2e8907ff98e9
children

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.
536 8a814bbbedfa Merged r544:545 from branches/stable-1.0: converted to UTF-8 encoding. Ryan C. Gordon <icculus@icculus.org> parents: 477 diff changeset	22 * Formats supported: 8 and 16 bit linear PCM, 8 bit µ-law.
8a814bbbedfa Merged r544:545 from branches/stable-1.0: converted to UTF-8 encoding. Ryan C. Gordon <icculus@icculus.org> parents: 477 diff changeset	23 * Files without valid header are assumed to be 8 bit µ-law, 8kHz, mono.
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	24 *
552 2e8907ff98e9 Replaced references to COPYING with references to LICENSE.txt ... Ryan C. Gordon <icculus@icculus.org> parents: 536 diff changeset	25 * Please see the file LICENSE.txt in the source's root directory.
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	26 *
536 8a814bbbedfa Merged r544:545 from branches/stable-1.0: converted to UTF-8 encoding. Ryan C. Gordon <icculus@icculus.org> parents: 477 diff changeset	27 * This file written by Mattias Engdegård. (f91-men@nada.kth.se)
213 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",
536 8a814bbbedfa Merged r544:545 from branches/stable-1.0: converted to UTF-8 encoding. Ryan C. Gordon <icculus@icculus.org> parents: 477 diff changeset	64 "Mattias Engdegård <f91-men@nada.kth.se>",
213 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 {
536 8a814bbbedfa Merged r544:545 from branches/stable-1.0: converted to UTF-8 encoding. Ryan C. Gordon <icculus@icculus.org> parents: 477 diff changeset	102 AU_ENC_ULAW_8 = 1, /* 8-bit ISDN µ-law */
213 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:
536 8a814bbbedfa Merged r544:545 from branches/stable-1.0: converted to UTF-8 encoding. Ryan C. Gordon <icculus@icculus.org> parents: 477 diff changeset	188 /* Convert 8-bit µ-law to 16-bit linear on the fly. This is
213 948b62500a54 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	189 slightly wasteful if the audio driver must convert them
536 8a814bbbedfa Merged r544:545 from branches/stable-1.0: converted to UTF-8 encoding. Ryan C. Gordon <icculus@icculus.org> parents: 477 diff changeset	190 back, but µ-law only devices are rare (mostly _old_ Suns) */
213 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
536 8a814bbbedfa Merged r544:545 from branches/stable-1.0: converted to UTF-8 encoding. Ryan C. Gordon <icculus@icculus.org> parents: 477 diff changeset	227 * header; these are traditionally assumed to be 8kHz µ-law. Handle
213 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
536 8a814bbbedfa Merged r544:545 from branches/stable-1.0: converted to UTF-8 encoding. Ryan C. Gordon <icculus@icculus.org> parents: 477 diff changeset	231 SNDDBG(("AU: Invalid header, assuming raw 8kHz µ-law.\n"));
213 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
536 8a814bbbedfa Merged r544:545 from branches/stable-1.0: converted to UTF-8 encoding. Ryan C. Gordon <icculus@icculus.org> parents: 477 diff changeset	270 /* table to convert from µ-law encoding to signed 16-bit samples,
213 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 {
536 8a814bbbedfa Merged r544:545 from branches/stable-1.0: converted to UTF-8 encoding. Ryan C. Gordon <icculus@icculus.org> parents: 477 diff changeset	320 /* We read µ-law samples into the second half of the buffer, so
213 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 @ 562:7e08477b0fc1