Mercurial > SDL_sound_CoreAudio

annotate decoders/oggtremor.c @ 591:8faf61a640f0 tip

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Resynced fixes for unit conversion bugs in the Ogg Tremor decoder from SoundDecoder/ALmixer. Ogg Vorbis uses seconds and we multiply by 1000 to convert to milliseconds. But Ogg Tremor already uses milliseconds but I was still multiplying by 1000.
author Eric Wing <ewing . public |-at-| gmail . com>
date Thu, 25 Oct 2012 16:34:18 -0700
parents 1c8414cd5839
children
rev   line source
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1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
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1 /*
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2 * SDL_sound -- An abstract sound format decoding API.
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3 * Copyright (C) 2001 Ryan C. Gordon.
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4 *
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5 * This library is free software; you can redistribute it and/or
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6 * modify it under the terms of the GNU Lesser General Public
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7 * License as published by the Free Software Foundation; either
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8 * version 2.1 of the License, or (at your option) any later version.
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9 *
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10 * This library is distributed in the hope that it will be useful,
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 * Lesser General Public License for more details.
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14 *
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15 * You should have received a copy of the GNU Lesser General Public
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16 * License along with this library; if not, write to the Free Software
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17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18 */
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19
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20 /*
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21 * Ogg Vorbis decoder for SDL_sound.
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22 *
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23 * This driver handles .OGG audio files, and depends on libvorbisfile to
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24 * do the actual decoding work. libvorbisfile is part of libvorbis, which
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25 * is part of the Ogg Vorbis project.
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26 *
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27 * Ogg Vorbis: http://www.xiph.org/ogg/vorbis/
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28 * vorbisfile documentation: http://www.xiph.org/ogg/vorbis/doc/vorbisfile/
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29 *
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30 * Please see the file LICENSE.txt in the source's root directory.
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31 *
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32 * This file written by Ryan C. Gordon. (icculus@icculus.org)
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33 */
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34
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35 #if HAVE_CONFIG_H
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36 # include <config.h>
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37 #endif
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38
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39 #ifdef SOUND_SUPPORTS_OGG
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40
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41 #include <stdio.h>
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42 #include <stdlib.h>
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43 #include <string.h>
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44 #include <math.h>
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45
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46 #include "SDL_sound.h"
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47
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48 #define __SDL_SOUND_INTERNAL__
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49 #include "SDL_sound_internal.h"
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50
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51 //#include <vorbis/codec.h>
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52 #include <ivorbisfile.h>
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53 #define ERR_IO_ERROR "I/O error"
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54
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55
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56 static int OGG_init(void);
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57 static void OGG_quit(void);
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58 static int OGG_open(Sound_Sample *sample, const char *ext);
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59 static void OGG_close(Sound_Sample *sample);
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60 static Uint32 OGG_read(Sound_Sample *sample);
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61 static int OGG_rewind(Sound_Sample *sample);
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62 static int OGG_seek(Sound_Sample *sample, Uint32 ms);
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63
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64 static const char *extensions_ogg[] = { "OGG", NULL };
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65 const Sound_DecoderFunctions __Sound_DecoderFunctions_OGG =
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66 {
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67 {
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68 extensions_ogg,
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69 "Ogg Vorbis audio through VorbisFile",
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70 "Ryan C. Gordon <icculus@icculus.org>",
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71 "http://www.icculus.org/SDL_sound/"
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72 },
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73
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74 OGG_init, /* init() method */
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75 OGG_quit, /* quit() method */
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76 OGG_open, /* open() method */
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77 OGG_close, /* close() method */
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78 OGG_read, /* read() method */
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79 OGG_rewind, /* rewind() method */
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80 OGG_seek /* seek() method */
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81 };
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82
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83
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84 static int OGG_init(void)
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85 {
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86 return(1); /* always succeeds. */
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87 } /* OGG_init */
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88
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89
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90 static void OGG_quit(void)
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91 {
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92 /* it's a no-op. */
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93 } /* OGG_quit */
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94
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95
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96
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97 /*
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98 * These are callbacks from vorbisfile that let them read data from
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99 * a RWops...
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100 */
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101
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102 static size_t RWops_ogg_read(void *ptr, size_t size, size_t nmemb, void *datasource)
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103 {
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104 return((size_t) SDL_RWread((SDL_RWops *) datasource, ptr, size, nmemb));
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105 } /* RWops_ogg_read */
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106
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107 static int RWops_ogg_seek(void *datasource, ogg_int64_t offset, int whence)
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108 {
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109 return(SDL_RWseek((SDL_RWops *) datasource, offset, whence));
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110 } /* RWops_ogg_seek */
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111
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112 static int RWops_ogg_close(void *datasource)
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113 {
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114 /* do nothing; SDL_sound will delete the RWops at a higher level. */
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115 return(0); /* this is success in fclose(), so I guess that's okay. */
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116 } /* RWops_ogg_close */
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117
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118 static long RWops_ogg_tell(void *datasource)
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119 {
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120 return((long) SDL_RWtell((SDL_RWops *) datasource));
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121 } /* RWops_ogg_tell */
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122
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123 static const ov_callbacks RWops_ogg_callbacks =
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124 {
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
125 RWops_ogg_read,
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
126 RWops_ogg_seek,
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
127 RWops_ogg_close,
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
128 RWops_ogg_tell
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
129 };
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
130
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
131
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
132 /* Return a human readable version of an VorbisFile error code... */
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
133 #if (defined DEBUG_CHATTER)
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
134 static const char *ogg_error(int errnum)
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
135 {
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
136 switch(errnum)
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
137 {
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
138 case OV_EREAD:
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
139 return("i/o error");
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
140 case OV_ENOTVORBIS:
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
141 return("not a vorbis file");
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
142 case OV_EVERSION:
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
143 return("Vorbis version mismatch");
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
144 case OV_EBADHEADER:
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
145 return("invalid Vorbis bitstream header");
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
146 case OV_EFAULT:
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
147 return("internal logic fault in Vorbis library");
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
148 } /* switch */
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
149
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
150 return("unknown error");
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
151 } /* ogg_error */
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
152 #endif
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
153
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
154 static __inline__ void output_ogg_comments(OggVorbis_File *vf)
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
155 {
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
156 #if (defined DEBUG_CHATTER)
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
157 int i;
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
158 vorbis_comment *vc = ov_comment(vf, -1);
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
159
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
160 if (vc == NULL)
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
161 return;
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
162
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
163 SNDDBG(("OGG: vendor == [%s].\n", vc->vendor));
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
164 for (i = 0; i < vc->comments; i++)
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
165 {
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
166 SNDDBG(("OGG: user comment [%s].\n", vc->user_comments[i]));
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
167 } /* for */
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
168 #endif
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
169 } /* output_ogg_comments */
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
170
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
171
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
172 static int OGG_open(Sound_Sample *sample, const char *ext)
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
173 {
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
174 int rc;
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
175 double total_time;
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
176 OggVorbis_File *vf;
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
177 vorbis_info *info;
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
178 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
179
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
180 vf = (OggVorbis_File *) malloc(sizeof (OggVorbis_File));
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
181 BAIL_IF_MACRO(vf == NULL, ERR_OUT_OF_MEMORY, 0);
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
182
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
183 rc = ov_open_callbacks(internal->rw, vf, NULL, 0, RWops_ogg_callbacks);
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
184 if (rc != 0)
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
185 {
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
186 SNDDBG(("OGG: can't grok data. reason: [%s].\n", ogg_error(rc)));
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
187 free(vf);
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
188 BAIL_MACRO("OGG: Not valid Ogg Vorbis data.", 0);
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
189 } /* if */
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
190
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
191 info = ov_info(vf, -1);
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
192 if (info == NULL)
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
193 {
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
194 ov_clear(vf);
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
195 free(vf);
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
196 BAIL_MACRO("OGG: failed to retrieve bitstream info", 0);
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
197 } /* if */
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
198
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
199 SNDDBG(("OGG: Accepting data stream.\n"));
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
200
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
201 output_ogg_comments(vf);
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
202 SNDDBG(("OGG: bitstream version == (%d).\n", info->version));
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
203 SNDDBG(("OGG: bitstream channels == (%d).\n", info->channels));
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
204 SNDDBG(("OGG: bitstream sampling rate == (%ld).\n", info->rate));
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
205 SNDDBG(("OGG: seekable == {%s}.\n", ov_seekable(vf) ? "TRUE" : "FALSE"));
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
206 SNDDBG(("OGG: number of logical bitstreams == (%ld).\n", ov_streams(vf)));
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
207 SNDDBG(("OGG: serial number == (%ld).\n", ov_serialnumber(vf, -1)));
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
208 SNDDBG(("OGG: total seconds of sample == (%f).\n", ov_time_total(vf, -1)));
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
209
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
210 internal->decoder_private = vf;
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
211 sample->flags = SOUND_SAMPLEFLAG_CANSEEK;
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
212 sample->actual.rate = (Uint32) info->rate;
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
213 sample->actual.channels = (Uint8) info->channels;
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
214 total_time = ov_time_total(vf, -1);
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
215 if (OV_EINVAL == total_time)
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
216 internal->total_time = -1;
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
217 else
591
8faf61a640f0 Resynced fixes for unit conversion bugs in the Ogg Tremor decoder from SoundDecoder/ALmixer.
Eric Wing <ewing . public |-at-| gmail . com>
parents: 590
diff changeset
218 internal->total_time = (Sint32)(total_time);
590
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
219
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
220
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
221 /*
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
222 * Since we might have more than one logical bitstream in the OGG file,
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
223 * and these bitstreams may be in different formats, we might be
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
224 * converting two or three times: once in vorbisfile, once again in
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
225 * SDL_sound, and perhaps a third time to get it to the sound device's
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
226 * format. That's wickedly inefficient.
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
227 *
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
228 * To combat this a little, if the user specified a desired format, we
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
229 * claim that to be the "actual" format of the collection of logical
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
230 * bitstreams. This means that VorbisFile will do a conversion as
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
231 * necessary, and SDL_sound will not. If the user didn't specify a
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
232 * desired format, then we pretend the "actual" format is something that
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
233 * OGG files are apparently commonly encoded in.
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
234 */
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
235 sample->actual.format = (sample->desired.format == 0) ?
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
236 AUDIO_S16SYS : sample->desired.format;
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
237 return(1);
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
238 } /* OGG_open */
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
239
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
240
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
241 static void OGG_close(Sound_Sample *sample)
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
242 {
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
243 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
244 OggVorbis_File *vf = (OggVorbis_File *) internal->decoder_private;
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
245 ov_clear(vf);
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
246 free(vf);
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
247 } /* OGG_close */
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
248
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
249 /* Note: According to the Vorbis documentation:
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250 * "ov_read() will decode at most one vorbis packet per invocation,
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251 * so the value returned will generally be less than length."
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252 * Due to this, for buffer sizes like 16384, SDL_Sound was always getting
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253 * an underfilled buffer and always setting the EAGAIN flag.
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254 * Since the SDL_Sound API implies that the entire buffer
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255 * should be filled unless EOF, additional code has been added
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256 * to this function to call ov_read() until the buffer is filled.
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257 * However, there may still be some corner cases where the buffer
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258 * cannot be entirely filled. So be aware.
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259 */
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260 static Uint32 OGG_read(Sound_Sample *sample)
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261 {
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262 int rc;
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263 int bitstream;
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264 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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265 OggVorbis_File *vf = (OggVorbis_File *) internal->decoder_private;
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266
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267 rc = ov_read(vf, internal->buffer, internal->buffer_size,
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268 &bitstream);
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269
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270 /* Make sure the read went smoothly... */
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271 if (rc == 0)
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272 sample->flags |= SOUND_SAMPLEFLAG_EOF;
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273
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274 else if (rc < 0)
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275 sample->flags |= SOUND_SAMPLEFLAG_ERROR;
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276
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277 /* If the buffer isn't filled, keep trying to fill it
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278 * until no more data can be grabbed */
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279 else if ((Uint32) rc < internal->buffer_size)
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280 {
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281 /* Creating a pointer to the buffer that denotes where to start
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282 * writing new data. */
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283 Uint8* buffer_start_point = NULL;
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284 int total_bytes_read = rc;
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285 int bytes_remaining = internal->buffer_size - rc;
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286
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287 /* Keep grabbing data until something prevents
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288 * us from getting more. (Could be EOF,
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289 * packets are too large to fit in remaining
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290 * space, or an error.)
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291 */
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292 while( (rc > 0) && (bytes_remaining > 0) )
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293 {
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294 /* Set buffer pointer to end of last write */
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295 /* All the messiness is to get rid of the warning for
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296 * dereferencing a void*
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297 */
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298 buffer_start_point = &(((Uint8*)internal->buffer)[total_bytes_read]);
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299 rc = ov_read(vf, buffer_start_point, bytes_remaining,
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300 &bitstream);
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301 /* Make sure rc > 0 because we don't accidently want
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302 * to change the counters if there was an error
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303 */
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304 if(rc > 0)
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305 {
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306 total_bytes_read += rc;
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307 bytes_remaining = bytes_remaining - rc;
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308 }
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309 }
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310 /* I think the minimum read size is 2, though I'm
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311 * not sure about this. (I've hit cases where I
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312 * couldn't read less than 4.) What I don't want to do is
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313 * accidently claim we hit EOF when the reason rc == 0
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314 * is because the requested amount of data was smaller
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315 * than the minimum packet size.
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316 * For now, I will be conservative
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317 * and not set the EOF flag, and let the next call to
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318 * this function figure it out.
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319 * I think the ERROR flag is safe to set because
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320 * it looks like OGG simply returns 0 if the
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321 * read size is too small.
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322 * And in most cases for sensible buffer sizes,
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323 * this fix will fill the buffer,
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324 * so we can set the EAGAIN flag without worrying
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325 * that it will always be set.
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326 */
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327 if(rc < 0)
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328 {
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329 sample->flags |= SOUND_SAMPLEFLAG_ERROR;
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330 }
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331 else if(rc == 0)
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332 {
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333 /* Do nothing for now until there is a better solution */
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334 /* sample->flags |= SOUND_SAMPLEFLAG_EOF; */
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335 }
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
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336
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
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337 /* Test for a buffer underrun. It should occur less frequently
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338 * now, but it still may happen and not necessarily mean
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339 * anything useful. */
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340 if ((Uint32) total_bytes_read < internal->buffer_size)
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
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341 {
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342 sample->flags |= SOUND_SAMPLEFLAG_EAGAIN;
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343 }
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
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344 /* change rc to the total bytes read so function
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
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345 * can return the correct value.
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
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346 */
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
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347 rc = total_bytes_read;
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
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348 }
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
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349
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
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350 return((Uint32) rc);
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
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351 } /* OGG_read */
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
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352
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353
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354 static int OGG_rewind(Sound_Sample *sample)
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
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355 {
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
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diff changeset
356 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
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357 OggVorbis_File *vf = (OggVorbis_File *) internal->decoder_private;
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358
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359 BAIL_IF_MACRO(ov_raw_seek(vf, 0) < 0, ERR_IO_ERROR, 0);
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
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360 return(1);
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
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361 } /* OGG_rewind */
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
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diff changeset
362
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
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363
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
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364 static int OGG_seek(Sound_Sample *sample, Uint32 ms)
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
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365 {
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366 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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367 OggVorbis_File *vf = (OggVorbis_File *) internal->decoder_private;
591
8faf61a640f0 Resynced fixes for unit conversion bugs in the Ogg Tremor decoder from SoundDecoder/ALmixer.
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parents: 590
diff changeset
368 /* Unlike Vorbis, Tremor uses integer milliseconds instead of double seconds. */
8faf61a640f0 Resynced fixes for unit conversion bugs in the Ogg Tremor decoder from SoundDecoder/ALmixer.
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parents: 590
diff changeset
369 BAIL_IF_MACRO(ov_time_seek(vf, (ogg_int64_t)ms) < 0, ERR_IO_ERROR, 0);
590
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370 return(1);
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
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371 } /* OGG_seek */
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
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372
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373 #endif /* SOUND_SUPPORTS_OGG */
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374
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
375
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
376 /* end of ogg.c ... */
1c8414cd5839 Introduced new Ogg Tremor decoder, based on the existing Ogg Vorbis decoder.
Eric Wing <ewing@anscamobile.com>
parents:
diff changeset
377