SDL_sound_CoreAudio: decoders/ogg.c annotate

annotate decoders/ogg.c @ 507:7f11a82e918e stable-1.0

Whoops, didn't actually fix the gcc4 warnings (backport from devbranch).

author	Ryan C. Gordon <icculus@icculus.org>
date	Sat, 17 Dec 2005 18:50:17 +0000
parents	30f96c853462
children	c66080364dff 50bb9a6cebfe

rev	line source
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	1 /*
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	2 * SDL_sound -- An abstract sound format decoding API.
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	3 * Copyright (C) 2001 Ryan C. Gordon.
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	4 *
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	5 * This library is free software; you can redistribute it and/or
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	6 * modify it under the terms of the GNU Lesser General Public
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	7 * License as published by the Free Software Foundation; either
0fc0f91b1b84 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.
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	9 *
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	10 * This library is distributed in the hope that it will be useful,
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	13 * Lesser General Public License for more details.
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	14 *
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	15 * You should have received a copy of the GNU Lesser General Public
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	16 * License along with this library; if not, write to the Free Software
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	18 */
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	19
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	20 /*
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	21 * Ogg Vorbis decoder for SDL_sound.
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	22 *
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	23 * This driver handles .OGG audio files, and depends on libvorbisfile to
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	24 * do the actual decoding work. libvorbisfile is part of libvorbis, which
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	25 * is part of the Ogg Vorbis project.
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	26 *
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	27 * Ogg Vorbis: http://www.xiph.org/ogg/vorbis/
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	28 * vorbisfile documentation: http://www.xiph.org/ogg/vorbis/doc/vorbisfile/
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	29 *
184 47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING". Ryan C. Gordon <icculus@icculus.org> parents: 149 diff changeset	30 * Please see the file COPYING in the source's root directory.
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	31 *
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	32 * This file written by Ryan C. Gordon. (icculus@clutteredmind.org)
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	33 */
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	34
106 40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	35 #if HAVE_CONFIG_H
40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	36 # include <config.h>
40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	37 #endif
100 6d9fdec2f708 added config.h, added --enable-debug flag, various other changes to the build system fingolfin parents: 63 diff changeset	38
104 103cfcb3c014 Updated to fix build system problem. Ryan C. Gordon <icculus@icculus.org> parents: 100 diff changeset	39 #ifdef SOUND_SUPPORTS_OGG
103cfcb3c014 Updated to fix build system problem. Ryan C. Gordon <icculus@icculus.org> parents: 100 diff changeset	40
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	41 #include <stdio.h>
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	42 #include <stdlib.h>
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	43 #include <string.h>
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	44 #include <math.h>
106 40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	45
40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	46 #include "SDL_sound.h"
40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	47
40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	48 #define __SDL_SOUND_INTERNAL__
40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	49 #include "SDL_sound_internal.h"
40de367eb59e Changing my include structure to do this right. Ryan C. Gordon <icculus@icculus.org> parents: 104 diff changeset	50
443 30f96c853462 MacOS X build fixes. Ryan C. Gordon <icculus@icculus.org> parents: 433 diff changeset	51 #include <vorbis/codec.h>
30f96c853462 MacOS X build fixes. Ryan C. Gordon <icculus@icculus.org> parents: 433 diff changeset	52 #include <vorbis/vorbisfile.h>
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	53
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	54
47 ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 24 diff changeset	55 static int OGG_init(void);
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 24 diff changeset	56 static void OGG_quit(void);
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	57 static int OGG_open(Sound_Sample sample, const char ext);
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	58 static void OGG_close(Sound_Sample *sample);
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	59 static Uint32 OGG_read(Sound_Sample *sample);
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	60 static int OGG_rewind(Sound_Sample *sample);
306 c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 231 diff changeset	61 static int OGG_seek(Sound_Sample *sample, Uint32 ms);
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	62
149 1df5c106504e Decoders can now list multiple file extensions. Ryan C. Gordon <icculus@icculus.org> parents: 122 diff changeset	63 static const char *extensions_ogg[] = { "OGG", NULL };
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	64 const Sound_DecoderFunctions __Sound_DecoderFunctions_OGG =
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	65 {
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	66 {
149 1df5c106504e Decoders can now list multiple file extensions. Ryan C. Gordon <icculus@icculus.org> parents: 122 diff changeset	67 extensions_ogg,
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	68 "Ogg Vorbis audio through VorbisFile",
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	69 "Ryan C. Gordon <icculus@clutteredmind.org>",
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	70 "http://www.icculus.org/SDL_sound/"
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	71 },
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	72
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	73 OGG_init, /* init() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	74 OGG_quit, /* quit() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	75 OGG_open, /* open() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	76 OGG_close, /* close() method */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	77 OGG_read, /* read() method */
306 c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 231 diff changeset	78 OGG_rewind, /* rewind() method */
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 231 diff changeset	79 OGG_seek /* seek() method */
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	80 };
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	81
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	82
47 ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 24 diff changeset	83 static int OGG_init(void)
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 24 diff changeset	84 {
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 24 diff changeset	85 return(1); /* always succeeds. */
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 24 diff changeset	86 } /* OGG_init */
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 24 diff changeset	87
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 24 diff changeset	88
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 24 diff changeset	89 static void OGG_quit(void)
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 24 diff changeset	90 {
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 24 diff changeset	91 /* it's a no-op. */
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 24 diff changeset	92 } /* OGG_quit */
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 24 diff changeset	93
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 24 diff changeset	94
ea58bc3b15d7 Added init() and quit() methods. Ryan C. Gordon <icculus@icculus.org> parents: 24 diff changeset	95
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	96 /*
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	97 * These are callbacks from vorbisfile that let them read data from
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	98 * a RWops...
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	99 */
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	100
63 9669aa13d3e0 Changes in preparation for autoconf, and the RWops wrappers changed to Ryan C. Gordon <icculus@icculus.org> parents: 59 diff changeset	101 static size_t RWops_ogg_read(void ptr, size_t size, size_t nmemb, void datasource)
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	102 {
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	103 return((size_t) SDL_RWread((SDL_RWops *) datasource, ptr, size, nmemb));
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	104 } /* RWops_ogg_read */
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	105
122 095a066b2cd2 Portability fix. Ryan C. Gordon <icculus@icculus.org> parents: 106 diff changeset	106 static int RWops_ogg_seek(void *datasource, ogg_int64_t offset, int whence)
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	107 {
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	108 return(SDL_RWseek((SDL_RWops *) datasource, offset, whence));
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	109 } /* RWops_ogg_seek */
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	110
63 9669aa13d3e0 Changes in preparation for autoconf, and the RWops wrappers changed to Ryan C. Gordon <icculus@icculus.org> parents: 59 diff changeset	111 static int RWops_ogg_close(void *datasource)
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	112 {
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	113 /* do nothing; SDL_sound will delete the RWops at a higher level. */
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	114 return(0); /* this is success in fclose(), so I guess that's okay. */
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	115 } /* RWops_ogg_close */
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	116
63 9669aa13d3e0 Changes in preparation for autoconf, and the RWops wrappers changed to Ryan C. Gordon <icculus@icculus.org> parents: 59 diff changeset	117 static long RWops_ogg_tell(void *datasource)
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	118 {
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	119 return((long) SDL_RWtell((SDL_RWops *) datasource));
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	120 } /* RWops_ogg_tell */
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	121
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	122 static const ov_callbacks RWops_ogg_callbacks =
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	123 {
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	124 RWops_ogg_read,
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	125 RWops_ogg_seek,
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	126 RWops_ogg_close,
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	127 RWops_ogg_tell
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	128 };
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	129
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	130
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	131 /* Return a human readable version of an VorbisFile error code... */
59 cd91e1857b42 Changed _D macro to SNDDBG, and fixed a warning if compiling without debug Ryan C. Gordon <icculus@icculus.org> parents: 47 diff changeset	132 #if (defined DEBUG_CHATTER)
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	133 static const char *ogg_error(int errnum)
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	134 {
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	135 switch(errnum)
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	136 {
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	137 case OV_EREAD:
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	138 return("i/o error");
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	139 case OV_ENOTVORBIS:
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	140 return("not a vorbis file");
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	141 case OV_EVERSION:
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	142 return("Vorbis version mismatch");
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	143 case OV_EBADHEADER:
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	144 return("invalid Vorbis bitstream header");
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	145 case OV_EFAULT:
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	146 return("internal logic fault in Vorbis library");
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	147 } /* switch */
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	148
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	149 return("unknown error");
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	150 } /* ogg_error */
59 cd91e1857b42 Changed _D macro to SNDDBG, and fixed a warning if compiling without debug Ryan C. Gordon <icculus@icculus.org> parents: 47 diff changeset	151 #endif
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	152
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	153 static __inline__ void output_ogg_comments(OggVorbis_File *vf)
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	154 {
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	155 #if (defined DEBUG_CHATTER)
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	156 int i;
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	157 vorbis_comment *vc = ov_comment(vf, -1);
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	158
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	159 if (vc == NULL)
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	160 return;
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	161
59 cd91e1857b42 Changed _D macro to SNDDBG, and fixed a warning if compiling without debug Ryan C. Gordon <icculus@icculus.org> parents: 47 diff changeset	162 SNDDBG(("OGG: vendor == [%s].\n", vc->vendor));
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	163 for (i = 0; i < vc->comments; i++)
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	164 {
59 cd91e1857b42 Changed _D macro to SNDDBG, and fixed a warning if compiling without debug Ryan C. Gordon <icculus@icculus.org> parents: 47 diff changeset	165 SNDDBG(("OGG: user comment [%s].\n", vc->user_comments[i]));
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	166 } /* for */
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	167 #endif
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	168 } /* output_ogg_comments */
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	169
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	170
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	171 static int OGG_open(Sound_Sample sample, const char ext)
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	172 {
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	173 int rc;
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	174 OggVorbis_File *vf;
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	175 vorbis_info *info;
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	176 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	177
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	178 vf = (OggVorbis_File *) malloc(sizeof (OggVorbis_File));
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	179 BAIL_IF_MACRO(vf == NULL, ERR_OUT_OF_MEMORY, 0);
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	180
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	181 rc = ov_open_callbacks(internal->rw, vf, NULL, 0, RWops_ogg_callbacks);
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	182 if (rc != 0)
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	183 {
59 cd91e1857b42 Changed _D macro to SNDDBG, and fixed a warning if compiling without debug Ryan C. Gordon <icculus@icculus.org> parents: 47 diff changeset	184 SNDDBG(("OGG: can't grok data. reason: [%s].\n", ogg_error(rc)));
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	185 free(vf);
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	186 BAIL_MACRO("OGG: Not valid Ogg Vorbis data.", 0);
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	187 } /* if */
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	188
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	189 info = ov_info(vf, -1);
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	190 if (info == NULL)
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	191 {
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	192 ov_clear(vf);
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	193 free(vf);
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	194 BAIL_MACRO("OGG: failed to retrieve bitstream info", 0);
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	195 } /* if */
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	196
59 cd91e1857b42 Changed _D macro to SNDDBG, and fixed a warning if compiling without debug Ryan C. Gordon <icculus@icculus.org> parents: 47 diff changeset	197 SNDDBG(("OGG: Accepting data stream.\n"));
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	198
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	199 output_ogg_comments(vf);
59 cd91e1857b42 Changed _D macro to SNDDBG, and fixed a warning if compiling without debug Ryan C. Gordon <icculus@icculus.org> parents: 47 diff changeset	200 SNDDBG(("OGG: bitstream version == (%d).\n", info->version));
cd91e1857b42 Changed _D macro to SNDDBG, and fixed a warning if compiling without debug Ryan C. Gordon <icculus@icculus.org> parents: 47 diff changeset	201 SNDDBG(("OGG: bitstream channels == (%d).\n", info->channels));
cd91e1857b42 Changed _D macro to SNDDBG, and fixed a warning if compiling without debug Ryan C. Gordon <icculus@icculus.org> parents: 47 diff changeset	202 SNDDBG(("OGG: bitstream sampling rate == (%ld).\n", info->rate));
cd91e1857b42 Changed _D macro to SNDDBG, and fixed a warning if compiling without debug Ryan C. Gordon <icculus@icculus.org> parents: 47 diff changeset	203 SNDDBG(("OGG: seekable == {%s}.\n", ov_seekable(vf) ? "TRUE" : "FALSE"));
cd91e1857b42 Changed _D macro to SNDDBG, and fixed a warning if compiling without debug Ryan C. Gordon <icculus@icculus.org> parents: 47 diff changeset	204 SNDDBG(("OGG: number of logical bitstreams == (%ld).\n", ov_streams(vf)));
cd91e1857b42 Changed _D macro to SNDDBG, and fixed a warning if compiling without debug Ryan C. Gordon <icculus@icculus.org> parents: 47 diff changeset	205 SNDDBG(("OGG: serial number == (%ld).\n", ov_serialnumber(vf, -1)));
cd91e1857b42 Changed _D macro to SNDDBG, and fixed a warning if compiling without debug Ryan C. Gordon <icculus@icculus.org> parents: 47 diff changeset	206 SNDDBG(("OGG: total seconds of sample == (%f).\n", ov_time_total(vf, -1)));
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	207
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	208 internal->decoder_private = vf;
327 aa7f6a110971 Added seek implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	209 sample->flags = SOUND_SAMPLEFLAG_CANSEEK;
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	210 sample->actual.rate = (Uint32) info->rate;
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	211 sample->actual.channels = (Uint8) info->channels;
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	212
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	213 /*
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	214 * Since we might have more than one logical bitstream in the OGG file,
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	215 * and these bitstreams may be in different formats, we might be
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	216 * converting two or three times: once in vorbisfile, once again in
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	217 * SDL_sound, and perhaps a third time to get it to the sound device's
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	218 * format. That's wickedly inefficient.
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	219 *
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	220 * To combat this a little, if the user specified a desired format, we
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	221 * claim that to be the "actual" format of the collection of logical
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	222 * bitstreams. This means that VorbisFile will do a conversion as
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	223 * necessary, and SDL_sound will not. If the user didn't specify a
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	224 * desired format, then we pretend the "actual" format is something that
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	225 * OGG files are apparently commonly encoded in.
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	226 */
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	227 sample->actual.format = (sample->desired.format == 0) ?
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	228 AUDIO_S16LSB : sample->desired.format;
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	229 return(1);
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	230 } /* OGG_open */
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	231
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	232
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	233 static void OGG_close(Sound_Sample *sample)
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	234 {
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	235 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	236 OggVorbis_File vf = (OggVorbis_File ) internal->decoder_private;
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	237 ov_clear(vf);
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	238 free(vf);
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	239 } /* OGG_close */
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	240
433 f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	241 /* Note: According to the Vorbis documentation:
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	242 * "ov_read() will decode at most one vorbis packet per invocation,
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	243 * so the value returned will generally be less than length."
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	244 * Due to this, for buffer sizes like 16384, SDL_Sound was always getting
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	245 * an underfilled buffer and always setting the EAGAIN flag.
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	246 * Since the SDL_Sound API implies that the entire buffer
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	247 * should be filled unless EOF, additional code has been added
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	248 * to this function to call ov_read() until the buffer is filled.
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	249 * However, there may still be some corner cases where the buffer
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	250 * cannot be entirely filled. So be aware.
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	251 */
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	252 static Uint32 OGG_read(Sound_Sample *sample)
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	253 {
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	254 int rc;
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	255 int bitstream;
433 f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	256 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	257 OggVorbis_File vf = (OggVorbis_File ) internal->decoder_private;
433 f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	258
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	259 rc = ov_read(vf, internal->buffer, internal->buffer_size,
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	260 ((sample->actual.format & 0x1000) ? 1 : 0), /* bigendian? */
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	261 ((sample->actual.format & 0xFF) / 8), /* bytes per sample point */
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	262 ((sample->actual.format & 0x8000) ? 1 : 0), /* signed data? */
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	263 &bitstream);
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	264
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	265 /* Make sure the read went smoothly... */
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	266 if (rc == 0)
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	267 sample->flags \|= SOUND_SAMPLEFLAG_EOF;
433 f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	268
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	269 else if (rc < 0)
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	270 sample->flags \|= SOUND_SAMPLEFLAG_ERROR;
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	271
433 f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	272 /* If the buffer isn't filled, keep trying to fill it
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	273 * until no more data can be grabbed */
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	274 else if ((Uint32) rc < internal->buffer_size)
433 f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	275 {
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	276 /* Creating a pointer to the buffer that denotes where to start
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	277 * writing new data. */
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	278 Uint8* buffer_start_point = NULL;
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	279 int total_bytes_read = rc;
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	280 int bytes_remaining = internal->buffer_size - rc;
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	281
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	282 /* Keep grabbing data until something prevents
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	283 * us from getting more. (Could be EOF,
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	284 * packets are too large to fit in remaining
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	285 * space, or an error.)
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	286 */
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	287 while( (rc > 0) && (bytes_remaining > 0) )
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	288 {
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	289 /* Set buffer pointer to end of last write */
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	290 /* All the messiness is to get rid of the warning for
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	291 * dereferencing a void*
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	292 */
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	293 buffer_start_point = &(((Uint8*)internal->buffer)[total_bytes_read]);
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	294 rc = ov_read(vf, buffer_start_point, bytes_remaining,
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	295 ((sample->actual.format & 0x1000) ? 1 : 0), /* bigendian? */
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	296 ((sample->actual.format & 0xFF) / 8), /* bytes per sample point */
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	297 ((sample->actual.format & 0x8000) ? 1 : 0), /* signed data? */
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	298 &bitstream);
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	299 /* Make sure rc > 0 because we don't accidently want
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	300 * to change the counters if there was an error
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	301 */
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	302 if(rc > 0)
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	303 {
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	304 total_bytes_read += rc;
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	305 bytes_remaining = bytes_remaining - rc;
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	306 }
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	307 }
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	308 /* I think the minimum read size is 2, though I'm
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	309 * not sure about this. (I've hit cases where I
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	310 * couldn't read less than 4.) What I don't want to do is
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	311 * accidently claim we hit EOF when the reason rc == 0
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	312 * is because the requested amount of data was smaller
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	313 * than the minimum packet size.
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	314 * For now, I will be conservative
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	315 * and not set the EOF flag, and let the next call to
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	316 * this function figure it out.
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	317 * I think the ERROR flag is safe to set because
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	318 * it looks like OGG simply returns 0 if the
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	319 * read size is too small.
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	320 * And in most cases for sensible buffer sizes,
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	321 * this fix will fill the buffer,
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	322 * so we can set the EAGAIN flag without worrying
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	323 * that it will always be set.
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	324 */
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	325 if(rc < 0)
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	326 {
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	327 sample->flags \|= SOUND_SAMPLEFLAG_ERROR;
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	328 }
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	329 else if(rc == 0)
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	330 {
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	331 /* Do nothing for now until there is a better solution */
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	332 /* sample->flags \|= SOUND_SAMPLEFLAG_EOF; */
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	333 }
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	334
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	335 /* Test for a buffer underrun. It should occur less frequently
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	336 * now, but it still may happen and not necessarily mean
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	337 * anything useful. */
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	338 if ((Uint32) total_bytes_read < internal->buffer_size)
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	339 {
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	340 sample->flags \|= SOUND_SAMPLEFLAG_EAGAIN;
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	341 }
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	342 /* change rc to the total bytes read so function
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	343 * can return the correct value.
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	344 */
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	345 rc = total_bytes_read;
f1c16afd9ebe Read until buffer is full in Sound_Decode() rather than one packet per call. Ryan C. Gordon <icculus@icculus.org> parents: 377 diff changeset	346 }
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	347
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	348 return((Uint32) rc);
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	349 } /* OGG_read */
0fc0f91b1b84 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: 184 diff changeset	351
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	352 static int OGG_rewind(Sound_Sample *sample)
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	353 {
231 d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	354 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	355 OggVorbis_File vf = (OggVorbis_File ) internal->decoder_private;
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	356
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	357 BAIL_IF_MACRO(ov_raw_seek(vf, 0) < 0, ERR_IO_ERROR, 0);
d3dc34315ac7 Rewind method implemented by Torbj�rn. Ryan C. Gordon <icculus@icculus.org> parents: 221 diff changeset	358 return(1);
221 c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	359 } /* OGG_rewind */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups. Ryan C. Gordon <icculus@icculus.org> parents: 184 diff changeset	360
306 c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 231 diff changeset	361
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 231 diff changeset	362 static int OGG_seek(Sound_Sample *sample, Uint32 ms)
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 231 diff changeset	363 {
327 aa7f6a110971 Added seek implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	364 Sound_SampleInternal internal = (Sound_SampleInternal ) sample->opaque;
aa7f6a110971 Added seek implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	365 OggVorbis_File vf = (OggVorbis_File ) internal->decoder_private;
aa7f6a110971 Added seek implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	366 double timepos = (((double) ms) / 1000.0);
aa7f6a110971 Added seek implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	367 BAIL_IF_MACRO(ov_time_seek(vf, timepos) < 0, ERR_IO_ERROR, 0);
aa7f6a110971 Added seek implementation. Ryan C. Gordon <icculus@icculus.org> parents: 306 diff changeset	368 return(1);
306 c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 231 diff changeset	369 } /* OGG_seek */
c97be6e1bd27 Added framework for Sound_Seek() support. Ryan C. Gordon <icculus@icculus.org> parents: 231 diff changeset	370
63 9669aa13d3e0 Changes in preparation for autoconf, and the RWops wrappers changed to Ryan C. Gordon <icculus@icculus.org> parents: 59 diff changeset	371 #endif /* SOUND_SUPPORTS_OGG */
9669aa13d3e0 Changes in preparation for autoconf, and the RWops wrappers changed to Ryan C. Gordon <icculus@icculus.org> parents: 59 diff changeset	372
9669aa13d3e0 Changes in preparation for autoconf, and the RWops wrappers changed to Ryan C. Gordon <icculus@icculus.org> parents: 59 diff changeset	373
24 0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	374 /* end of ogg.c ... */
0fc0f91b1b84 Initial add. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	375

Mercurial > SDL_sound_CoreAudio

annotate decoders/ogg.c @ 507:7f11a82e918e stable-1.0