include/vlc_codecs.h

   1 /*****************************************************************************
   2  * vlc_codecs.h: codec related structures needed by the demuxers and decoders
   3  *****************************************************************************
   4  * Copyright (C) 1999-2001 VLC authors and VideoLAN
   5  * $Id$
   6  *
   7  * Author: Gildas Bazin <gbazin@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU Lesser General Public License as published by
  11  * the Free Software Foundation; either version 2.1 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public License
  20  * along with this program; if not, write to the Free Software Foundation,
  21  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 #ifndef VLC_CODECS_H
  25 #define VLC_CODECS_H 1
  26
  27 #include <vlc_fourcc.h>
  28 /**
  29  * \file
  30  * This file defines codec related structures needed by the demuxers and decoders
  31  */
  32
  33 /* Structures exported to the demuxers and decoders */
  34
  35 #if !(defined _GUID_DEFINED || defined GUID_DEFINED)
  36 #define GUID_DEFINED
  37 typedef struct _GUID
  38 {
  39     uint32_t Data1;
  40     uint16_t Data2;
  41     uint16_t Data3;
  42     uint8_t  Data4[8];
  43 } GUID, *REFGUID, *LPGUID;
  44 #endif /* GUID_DEFINED */
  45
  46 typedef GUID guid_t;
  47
  48 #ifdef HAVE_ATTRIBUTE_PACKED
  49 #   define ATTR_PACKED __attribute__((__packed__))
  50 #elif defined(__SUNPRO_C)
  51 #   pragma pack(1)
  52 #   define ATTR_PACKED
  53 #elif defined(__APPLE__)
  54 #   pragma pack(push, 1)
  55 #   define ATTR_PACKED
  56 #else
  57 #   error FIXME
  58 #endif
  59
  60 #ifndef _WAVEFORMATEX_
  61 #define _WAVEFORMATEX_
  62 typedef struct
  63 ATTR_PACKED
  64 _WAVEFORMATEX {
  65     uint16_t   wFormatTag;
  66     uint16_t   nChannels;
  67     uint32_t   nSamplesPerSec;
  68     uint32_t   nAvgBytesPerSec;
  69     uint16_t   nBlockAlign;
  70     uint16_t   wBitsPerSample;
  71     uint16_t   cbSize;
  72 } WAVEFORMATEX, *PWAVEFORMATEX, *NPWAVEFORMATEX, *LPWAVEFORMATEX;
  73 #endif /* _WAVEFORMATEX_ */
  74
  75 #ifndef _WAVEFORMATEXTENSIBLE_
  76 #define _WAVEFORMATEXTENSIBLE_
  77 typedef struct
  78 ATTR_PACKED
  79 _WAVEFORMATEXTENSIBLE {
  80     WAVEFORMATEX Format;
  81     union {
  82         uint16_t wValidBitsPerSample;
  83         uint16_t wSamplesPerBlock;
  84         uint16_t wReserved;
  85     } Samples;
  86     uint32_t     dwChannelMask;
  87     GUID SubFormat;
  88 } WAVEFORMATEXTENSIBLE, *PWAVEFORMATEXTENSIBLE;
  89 #endif /* _WAVEFORMATEXTENSIBLE_ */
  90
  91 #ifndef _WAVEHEADER_
  92 #define _WAVEHEADER_
  93 typedef struct
  94 ATTR_PACKED
  95 _WAVEHEADER {
  96     uint32_t MainChunkID;
  97     uint32_t Length;
  98     uint32_t ChunkTypeID;
  99     uint32_t SubChunkID;
 100     uint32_t SubChunkLength;
 101     uint16_t Format;
 102     uint16_t Modus;
 103     uint32_t SampleFreq;
 104     uint32_t BytesPerSec;
 105     uint16_t BytesPerSample;
 106     uint16_t BitsPerSample;
 107     uint32_t DataChunkID;
 108     uint32_t DataLength;
 109 } WAVEHEADER;
 110 #endif /* _WAVEHEADER_ */
 111
 112 #ifndef _VLC_BITMAPINFOHEADER_
 113 #define _VLC_BITMAPINFOHEADER_
 114
 115 typedef struct
 116 ATTR_PACKED
 117 {
 118     uint32_t   biSize;
 119     uint32_t   biWidth;
 120     uint32_t   biHeight;
 121     uint16_t   biPlanes;
 122     uint16_t   biBitCount;
 123     uint32_t   biCompression;
 124     uint32_t   biSizeImage;
 125     uint32_t   biXPelsPerMeter;
 126     uint32_t   biYPelsPerMeter;
 127     uint32_t   biClrUsed;
 128     uint32_t   biClrImportant;
 129 } VLC_BITMAPINFOHEADER, *VLC_PBITMAPINFOHEADER, *VLC_LPBITMAPINFOHEADER;
 130
 131 typedef struct
 132 ATTR_PACKED
 133 {
 134     VLC_BITMAPINFOHEADER bmiHeader;
 135     int                  bmiColors[1];
 136 } VLC_BITMAPINFO, *VLC_LPBITMAPINFO;
 137 #endif
 138
 139 #ifndef _RECT32_
 140 #define _RECT32_
 141 typedef struct
 142 ATTR_PACKED
 143 {
 144     int left, top, right, bottom;
 145 } RECT32;
 146 #endif
 147
 148 #ifndef _REFERENCE_TIME_
 149 #define _REFERENCE_TIME_
 150 typedef int64_t REFERENCE_TIME;
 151 #endif
 152
 153 #ifndef _VIDEOINFOHEADER_
 154 #define _VIDEOINFOHEADER_
 155 typedef struct
 156 ATTR_PACKED
 157 {
 158     RECT32                  rcSource;
 159     RECT32                  rcTarget;
 160     uint32_t                dwBitRate;
 161     uint32_t                dwBitErrorRate;
 162     REFERENCE_TIME          AvgTimePerFrame;
 163     VLC_BITMAPINFOHEADER    bmiHeader;
 164 } VIDEOINFOHEADER;
 165 #endif
 166
 167 #ifndef _RGBQUAD_
 168 #define _RGBQUAD_
 169 typedef struct
 170 ATTR_PACKED
 171 {
 172     uint8_t rgbBlue;
 173     uint8_t rgbGreen;
 174     uint8_t rgbRed;
 175     uint8_t rgbReserved;
 176 } RGBQUAD1;
 177 #endif
 178
 179 #ifndef _TRUECOLORINFO_
 180 #define _TRUECOLORINFO_
 181 typedef struct
 182 ATTR_PACKED
 183 {
 184     uint32_t dwBitMasks[3];
 185     RGBQUAD1 bmiColors[256];
 186 } TRUECOLORINFO;
 187 #endif
 188
 189 #ifndef _VIDEOINFO_
 190 #define _VIDEOINFO_
 191 typedef struct
 192 ATTR_PACKED
 193 {
 194     RECT32                  rcSource;
 195     RECT32                  rcTarget;
 196     uint32_t                dwBitRate;
 197     uint32_t                dwBitErrorRate;
 198     REFERENCE_TIME          AvgTimePerFrame;
 199     VLC_BITMAPINFOHEADER    bmiHeader;
 200
 201     union
 202     {
 203         RGBQUAD1 bmiColors[256]; /* Colour palette */
 204         uint32_t dwBitMasks[3]; /* True colour masks */
 205         TRUECOLORINFO TrueColorInfo; /* Both of the above */
 206     };
 207
 208 } VIDEOINFO;
 209 #endif
 210
 211 #if defined(__SUNPRO_C)
 212 #   pragma pack()
 213 #elif defined(__APPLE__) && !HAVE_ATTRIBUTE_PACKED
 214 #   pragma pack(pop)
 215 #endif
 216
 217 /* WAVE format wFormatTag IDs */
 218 /* See http://msdn.microsoft.com/en-us/library/aa904731%28v=vs.80%29.aspx */
 219 #define WAVE_FORMAT_UNKNOWN             0x0000 /* Microsoft Corporation */
 220 #define WAVE_FORMAT_PCM                 0x0001 /* Microsoft Corporation */
 221 #define WAVE_FORMAT_ADPCM               0x0002 /* Microsoft Corporation */
 222 #define WAVE_FORMAT_IEEE_FLOAT          0x0003 /* Microsoft Corporation */
 223 #define WAVE_FORMAT_ALAW                0x0006 /* Microsoft Corporation */
 224 #define WAVE_FORMAT_MULAW               0x0007 /* Microsoft Corporation */
 225 #define WAVE_FORMAT_DTS_MS              0x0008 /* Microsoft Corporation */
 226 #define WAVE_FORMAT_WMAS                0x000a /* WMA 9 Speech */
 227 #define WAVE_FORMAT_IMA_ADPCM           0x0011 /* Intel Corporation */
 228 #define WAVE_FORMAT_YAMAHA_ADPCM        0x0020 /* Yamaha */
 229 #define WAVE_FORMAT_TRUESPEECH          0x0022 /* TrueSpeech */
 230 #define WAVE_FORMAT_GSM610              0x0031 /* Microsoft Corporation */
 231 #define WAVE_FORMAT_MSNAUDIO            0x0032 /* Microsoft Corporation */
 232 #define WAVE_FORMAT_MSG723              0x0042 /* Microsoft G.723 [G723.1] */
 233 #define WAVE_FORMAT_G726                0x0045 /* ITU-T standard  */
 234 #define WAVE_FORMAT_MPEG                0x0050 /* Microsoft Corporation */
 235 #define WAVE_FORMAT_MPEGLAYER3          0x0055 /* ISO/MPEG Layer3 Format Tag */
 236 #define WAVE_FORMAT_AMR_NB              0x0057 /* AMR NB */
 237 #define WAVE_FORMAT_AMR_WB              0x0058 /* AMR Wideband */
 238 #define WAVE_FORMAT_DOLBY_AC3_SPDIF     0x0092 /* Sonic Foundry */
 239
 240 #define WAVE_FORMAT_AAC                 0x00FF /* */
 241 #define WAVE_FORMAT_AAC_MS              0xa106 /* Microsoft AAC */
 242 #define WAVE_FORMAT_SIPRO               0x0130 /* Sipro Lab Telecom Inc. */
 243
 244 #define WAVE_FORMAT_WMA1                0x0160 /* WMA version 1 */
 245 #define WAVE_FORMAT_WMA2                0x0161 /* WMA (v2) 7, 8, 9 Series */
 246 #define WAVE_FORMAT_WMAP                0x0162 /* WMA 9 Professional */
 247 #define WAVE_FORMAT_WMAL                0x0163 /* WMA 9 Lossless */
 248
 249 #define WAVE_FORMAT_ULEAD_DV_AUDIO_NTSC 0x0215 /* Ulead */
 250 #define WAVE_FORMAT_ULEAD_DV_AUDIO_PAL  0x0216 /* Ulead */
 251
 252 #define WAVE_FORMAT_ATRAC3              0x0270 /* Atrac3, != from MSDN doc */
 253 #define WAVE_FORMAT_SONY_ATRAC3         0x0272 /* Atrac3, != from MSDN doc */
 254
 255 #define WAVE_FORMAT_INDEO_AUDIO         0x0402 /* Indeo Audio Coder */
 256
 257 #define WAVE_FORMAT_AAC_2               0x1601 /* Other AAC */
 258 #define WAVE_FORMAT_AAC_LATM            0x1602 /* AAC/LATM */
 259
 260 #define WAVE_FORMAT_A52                 0x2000 /* a52 */
 261 #define WAVE_FORMAT_DTS                 0x2001 /* DTS */
 262 #define WAVE_FORMAT_FFMPEG_AAC          0x706D
 263 #define WAVE_FORMAT_DIVIO_AAC           0x4143 /* Divio's AAC */
 264
 265 #define WAVE_FORMAT_GSM_AMR_FIXED       0x7A21 /* Fixed bitrate, no SID */
 266 #define WAVE_FORMAT_GSM_AMR             0x7A22 /* Variable bitrate, including SID */
 267
 268 /* Need to check these */
 269 #define WAVE_FORMAT_DK3                 0x0061
 270 #define WAVE_FORMAT_DK4                 0x0062
 271
 272 /* At least FFmpeg use that ID: from libavformat/riff.c ('Vo' == 0x566f)
 273  * { CODEC_ID_VORBIS, ('V'<<8)+'o' }, //HACK/FIXME, does vorbis in WAV/AVI have an (in)official id?
 274  */
 275 #define WAVE_FORMAT_VORBIS              0x566f
 276
 277 /* It seems that these IDs are used by braindead & obsolete VorbisACM encoder
 278  * (Windows only)
 279  * A few info is available except VorbisACM source (remember, Windows only)
 280  * (available on http://svn.xiph.org), but it seems that vo3+ at least is
 281  * made of Vorbis data encapsulated in Ogg container...
 282  */
 283 #define WAVE_FORMAT_VORB_1              0x674f
 284 #define WAVE_FORMAT_VORB_2              0x6750
 285 #define WAVE_FORMAT_VORB_3              0x6751
 286 #define WAVE_FORMAT_VORB_1PLUS          0x676f
 287 #define WAVE_FORMAT_VORB_2PLUS          0x6770
 288 #define WAVE_FORMAT_VORB_3PLUS          0x6771
 289
 290 #define WAVE_FORMAT_G723_1              0xa100
 291
 292 #define WAVE_FORMAT_SPEEX               0xa109 /* Speex audio */
 293 #define WAVE_FORMAT_FLAC                0xf1ac /* Xiph Flac */
 294
 295 #if !defined(WAVE_FORMAT_EXTENSIBLE)
 296   #define WAVE_FORMAT_EXTENSIBLE          0xFFFE /* Microsoft */
 297 #endif
 298
 299 /* GUID SubFormat IDs */
 300 /* We need both b/c const variables are not compile-time constants in C, giving
 301  * us an error if we use the const GUID in an enum */
 302
 303 #ifndef _KSDATAFORMAT_SUBTYPE_PCM_
 304 #define _KSDATAFORMAT_SUBTYPE_PCM_ {0x00000001, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}}
 305 static const GUID VLC_KSDATAFORMAT_SUBTYPE_PCM = {0xE923AABF, 0xCB58, 0x4471, {0xA1, 0x19, 0xFF, 0xFA, 0x01, 0xE4, 0xCE, 0x62}};
 306 #define KSDATAFORMAT_SUBTYPE_PCM VLC_KSDATAFORMAT_SUBTYPE_PCM
 307 #endif
 308
 309 #ifndef _KSDATAFORMAT_SUBTYPE_UNKNOWN_
 310 #define _KSDATAFORMAT_SUBTYPE_UNKNOWN_ {0x00000000, 0x0000, 0x0000, {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}}
 311 static const GUID VLC_KSDATAFORMAT_SUBTYPE_UNKNOWN = {0x00000000, 0x0000, 0x0000, {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
 312 #define KSDATAFORMAT_SUBTYPE_UNKNOWN VLC_KSDATAFORMAT_SUBTYPE_UNKNOWN
 313 #endif
 314
 315 /* Microsoft speaker definitions */
 316 #define WAVE_SPEAKER_FRONT_LEFT             0x1
 317 #define WAVE_SPEAKER_FRONT_RIGHT            0x2
 318 #define WAVE_SPEAKER_FRONT_CENTER           0x4
 319 #define WAVE_SPEAKER_LOW_FREQUENCY          0x8
 320 #define WAVE_SPEAKER_BACK_LEFT              0x10
 321 #define WAVE_SPEAKER_BACK_RIGHT             0x20
 322 #define WAVE_SPEAKER_FRONT_LEFT_OF_CENTER   0x40
 323 #define WAVE_SPEAKER_FRONT_RIGHT_OF_CENTER  0x80
 324 #define WAVE_SPEAKER_BACK_CENTER            0x100
 325 #define WAVE_SPEAKER_SIDE_LEFT              0x200
 326 #define WAVE_SPEAKER_SIDE_RIGHT             0x400
 327 #define WAVE_SPEAKER_TOP_CENTER             0x800
 328 #define WAVE_SPEAKER_TOP_FRONT_LEFT         0x1000
 329 #define WAVE_SPEAKER_TOP_FRONT_CENTER       0x2000
 330 #define WAVE_SPEAKER_TOP_FRONT_RIGHT        0x4000
 331 #define WAVE_SPEAKER_TOP_BACK_LEFT          0x8000
 332 #define WAVE_SPEAKER_TOP_BACK_CENTER        0x10000
 333 #define WAVE_SPEAKER_TOP_BACK_RIGHT         0x20000
 334 #define WAVE_SPEAKER_RESERVED               0x80000000
 335
 336 static const struct
 337 {
 338     uint16_t     i_tag;
 339     vlc_fourcc_t i_fourcc;
 340     const char  *psz_name;
 341 }
 342 wave_format_tag_to_fourcc[] =
 343 {
 344     { WAVE_FORMAT_PCM,        VLC_FOURCC( 'a', 'r', 'a', 'w' ), "Raw audio" },
 345     { WAVE_FORMAT_PCM,        VLC_CODEC_S8,                     "PCM S8 audio" },
 346     { WAVE_FORMAT_PCM,        VLC_CODEC_S16L,                   "PCM S16L audio" },
 347     { WAVE_FORMAT_PCM,        VLC_CODEC_S24L,                   "PCM S24L audio" },
 348     { WAVE_FORMAT_PCM,        VLC_CODEC_S32L,                   "PCM S32L audio" },
 349     { WAVE_FORMAT_ADPCM,      VLC_CODEC_ADPCM_MS,               "ADPCM" },
 350     { WAVE_FORMAT_IEEE_FLOAT, VLC_FOURCC( 'a', 'f', 'l', 't' ), "IEEE Float audio" },
 351     { WAVE_FORMAT_IEEE_FLOAT, VLC_CODEC_F32L,                   "PCM 32 (Float) audio" },
 352     { WAVE_FORMAT_IEEE_FLOAT, VLC_CODEC_F64L,                   "PCM 64 (Float) audio" },
 353     { WAVE_FORMAT_ALAW,       VLC_CODEC_ALAW,                   "A-Law" },
 354     { WAVE_FORMAT_MULAW,      VLC_CODEC_MULAW,                  "Mu-Law" },
 355     { WAVE_FORMAT_IMA_ADPCM,  VLC_CODEC_ADPCM_IMA_WAV,          "Ima-ADPCM" },
 356     { WAVE_FORMAT_YAMAHA_ADPCM, VLC_CODEC_ADPCM_YAMAHA,         "Yamaha ADPCM" },
 357     { WAVE_FORMAT_TRUESPEECH, VLC_CODEC_TRUESPEECH,             "Truespeech" },
 358     { WAVE_FORMAT_GSM610,     VLC_CODEC_GSM_MS,                 "Microsoft WAV GSM" },
 359     { WAVE_FORMAT_G726,       VLC_CODEC_ADPCM_G726,             "G.726 ADPCM" },
 360     { WAVE_FORMAT_G723_1,     VLC_CODEC_G723_1,                 "G.723.1" },
 361     { WAVE_FORMAT_MSG723,     VLC_CODEC_G723_1,                 "Microsoft G.723 [G723.1]" },
 362     { WAVE_FORMAT_MPEGLAYER3, VLC_CODEC_MPGA,                   "Mpeg Audio" },
 363     { WAVE_FORMAT_MPEG,       VLC_CODEC_MPGA,                   "Mpeg Audio" },
 364     { WAVE_FORMAT_AMR_NB,     VLC_CODEC_AMR_NB,                 "AMR NB" },
 365     { WAVE_FORMAT_AMR_WB,     VLC_CODEC_AMR_WB,                 "AMR Wideband" },
 366     { WAVE_FORMAT_SIPRO,      VLC_CODEC_SIPR,                   "Sipr Audio" },
 367     { WAVE_FORMAT_A52,        VLC_CODEC_A52,                    "A/52" },
 368     { WAVE_FORMAT_WMA1,       VLC_CODEC_WMA1,                   "Window Media Audio v1" },
 369     { WAVE_FORMAT_WMA2,       VLC_CODEC_WMA2,                   "Window Media Audio v2" },
 370     { WAVE_FORMAT_WMAP,       VLC_CODEC_WMAP,                   "Window Media Audio 9 Professional" },
 371     { WAVE_FORMAT_WMAL,       VLC_CODEC_WMAL,                   "Window Media Audio 9 Lossless" },
 372     { WAVE_FORMAT_WMAS,       VLC_CODEC_WMAS,                   "Window Media Audio 9 Speech" },
 373     { WAVE_FORMAT_ATRAC3,     VLC_CODEC_ATRAC3,                 "Sony Atrac3" },
 374     { WAVE_FORMAT_SONY_ATRAC3,VLC_CODEC_ATRAC3,                 "Sony Atrac3" },
 375     { WAVE_FORMAT_DK3,        VLC_FOURCC( 'm', 's', 0x00,0x61), "Duck DK3" },
 376     { WAVE_FORMAT_DK4,        VLC_FOURCC( 'm', 's', 0x00,0x62), "Duck DK4" },
 377     { WAVE_FORMAT_DTS,        VLC_CODEC_DTS,                    "DTS Coherent Acoustics" },
 378     { WAVE_FORMAT_DTS_MS,     VLC_CODEC_DTS,                    "DTS Coherent Acoustics" },
 379     { WAVE_FORMAT_DIVIO_AAC,  VLC_CODEC_MP4A,                   "MPEG-4 Audio (Divio)" },
 380     { WAVE_FORMAT_AAC,        VLC_CODEC_MP4A,                   "MPEG-4 Audio" },
 381     { WAVE_FORMAT_AAC_2,      VLC_CODEC_MP4A,                   "MPEG-4 Audio" },
 382     { WAVE_FORMAT_AAC_LATM,   VLC_CODEC_MP4A,                   "MPEG-4 Audio" },
 383     { WAVE_FORMAT_FFMPEG_AAC, VLC_CODEC_MP4A,                   "MPEG-4 Audio" },
 384     { WAVE_FORMAT_AAC_MS,     VLC_CODEC_MP4A,                   "MPEG-4 Audio" },
 385     { WAVE_FORMAT_VORBIS,     VLC_CODEC_VORBIS,                 "Vorbis Audio" },
 386     { WAVE_FORMAT_VORB_1,     VLC_FOURCC( 'v', 'o', 'r', '1' ), "Vorbis 1 Audio" },
 387     { WAVE_FORMAT_VORB_1PLUS, VLC_FOURCC( 'v', 'o', '1', '+' ), "Vorbis 1+ Audio" },
 388     { WAVE_FORMAT_VORB_2,     VLC_FOURCC( 'v', 'o', 'r', '2' ), "Vorbis 2 Audio" },
 389     { WAVE_FORMAT_VORB_2PLUS, VLC_FOURCC( 'v', 'o', '2', '+' ), "Vorbis 2+ Audio" },
 390     { WAVE_FORMAT_VORB_3,     VLC_FOURCC( 'v', 'o', 'r', '3' ), "Vorbis 3 Audio" },
 391     { WAVE_FORMAT_VORB_3PLUS, VLC_FOURCC( 'v', 'o', '3', '+' ), "Vorbis 3+ Audio" },
 392     { WAVE_FORMAT_SPEEX,      VLC_CODEC_SPEEX,                  "Speex Audio" },
 393     { WAVE_FORMAT_FLAC,       VLC_CODEC_FLAC,                   "FLAC Audio" },
 394     { WAVE_FORMAT_GSM_AMR_FIXED, VLC_CODEC_AMR_NB,              "GSM-AMR Audio CBR, no SID" },
 395     { WAVE_FORMAT_GSM_AMR,    VLC_CODEC_AMR_NB,                 "GSM-AMR Audio VBR, SID" },
 396     { WAVE_FORMAT_ULEAD_DV_AUDIO_NTSC, VLC_CODEC_ULEAD_DV_AUDIO_NTSC, "Ulead DV audio NTSC" },
 397     { WAVE_FORMAT_ULEAD_DV_AUDIO_PAL, VLC_CODEC_ULEAD_DV_AUDIO_PAL, "Ulead DV audio PAL" },
 398     { WAVE_FORMAT_INDEO_AUDIO, VLC_CODEC_INDEO_AUDIO, "Indeo Audio Coder" },
 399     { WAVE_FORMAT_UNKNOWN,    VLC_FOURCC( 'u', 'n', 'd', 'f' ), "Unknown" }
 400 };
 401
 402 static inline void wf_tag_to_fourcc( uint16_t i_tag, vlc_fourcc_t *fcc,
 403                                      const char **ppsz_name )
 404 {
 405     int i;
 406     for( i = 0; wave_format_tag_to_fourcc[i].i_tag != 0; i++ )
 407     {
 408         if( wave_format_tag_to_fourcc[i].i_tag == i_tag ) break;
 409     }
 410     if( fcc ) *fcc = wave_format_tag_to_fourcc[i].i_fourcc;
 411     if( ppsz_name ) *ppsz_name = wave_format_tag_to_fourcc[i].psz_name;
 412 }
 413
 414 static inline void fourcc_to_wf_tag( vlc_fourcc_t fcc, uint16_t *pi_tag )
 415 {
 416     int i;
 417     for( i = 0; wave_format_tag_to_fourcc[i].i_tag != 0; i++ )
 418     {
 419         if( wave_format_tag_to_fourcc[i].i_fourcc == fcc ) break;
 420     }
 421     if( pi_tag ) *pi_tag = wave_format_tag_to_fourcc[i].i_tag;
 422 }
 423
 424 /* If wFormatTag is WAVEFORMATEXTENSIBLE, we must look at the SubFormat tag
 425  * to determine the actual format.  Microsoft has stopped giving out wFormatTag
 426  * assignments in lieu of letting 3rd parties generate their own GUIDs
 427  */
 428 static const struct
 429 {
 430     GUID         guid_tag;
 431     vlc_fourcc_t i_fourcc;
 432     const char  *psz_name;
 433 }
 434 sub_format_tag_to_fourcc[] =
 435 {
 436     { _KSDATAFORMAT_SUBTYPE_PCM_, VLC_FOURCC( 'a', 'r', 'a', 'w' ), "PCM" },
 437     { _KSDATAFORMAT_SUBTYPE_UNKNOWN_, VLC_FOURCC( 'u', 'n', 'd', 'f' ), "Unknown" }
 438 };
 439
 440 /* compares two GUIDs, returns 1 if identical, 0 otherwise */
 441 static inline int guidcmp( const GUID *s1, const GUID *s2 )
 442 {
 443     return( s1->Data1 == s2->Data1 && s1->Data2 == s2->Data2 &&
 444             s1->Data3 == s2->Data3 && !memcmp( s1->Data4, s2->Data4, 8 ) );
 445 }
 446
 447 static inline void sf_tag_to_fourcc( GUID *guid_tag,
 448                                      vlc_fourcc_t *fcc, const char **ppsz_name )
 449 {
 450     int i;
 451
 452     for( i = 0; !guidcmp( &sub_format_tag_to_fourcc[i].guid_tag,
 453                           &KSDATAFORMAT_SUBTYPE_UNKNOWN ); i++ )
 454     {
 455         if( guidcmp( &sub_format_tag_to_fourcc[i].guid_tag, guid_tag ) ) break;
 456     }
 457     if( fcc ) *fcc = sub_format_tag_to_fourcc[i].i_fourcc;
 458     if( ppsz_name ) *ppsz_name = sub_format_tag_to_fourcc[i].psz_name;
 459 }
 460
 461 #endif /* "codecs.h" */