ext/vorbis/gstvorbiscommon.c

   1 /* GStreamer
   2  * Copyright (C) 2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
  17  * Boston, MA 02110-1301, USA.
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "gstvorbiscommon.h"
  25
  26 /* http://www.xiph.org/vorbis/doc/Vorbis_I_spec.html#x1-800004.3.9 */
  27 const GstAudioChannelPosition gst_vorbis_channel_positions[][8] = {
  28   {                             /* Mono */
  29       GST_AUDIO_CHANNEL_POSITION_MONO},
  30   {                             /* Stereo */
  31         GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
  32       GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT},
  33   {                             /* Stereo + Centre */
  34         GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
  35         GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
  36       GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT},
  37   {                             /* Quadraphonic */
  38         GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
  39         GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
  40         GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
  41         GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
  42       },
  43   {                             /* Stereo + Centre + rear stereo */
  44         GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
  45         GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
  46         GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
  47         GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
  48         GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
  49       },
  50   {                             /* Full 5.1 Surround */
  51         GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
  52         GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
  53         GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
  54         GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
  55         GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
  56         GST_AUDIO_CHANNEL_POSITION_LFE1,
  57       },
  58   {                             /* 6.1 Surround, in Vorbis spec since 2010-01-13 */
  59         GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
  60         GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
  61         GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
  62         GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT,
  63         GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT,
  64         GST_AUDIO_CHANNEL_POSITION_REAR_CENTER,
  65       GST_AUDIO_CHANNEL_POSITION_LFE1},
  66   {                             /* 7.1 Surround, in Vorbis spec since 2010-01-13 */
  67         GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
  68         GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
  69         GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
  70         GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT,
  71         GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT,
  72         GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
  73         GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
  74       GST_AUDIO_CHANNEL_POSITION_LFE1},
  75 };
  76
  77 const GstAudioChannelPosition gst_vorbis_default_channel_positions[][8] = {
  78   {                             /* Mono */
  79       GST_AUDIO_CHANNEL_POSITION_MONO},
  80   {                             /* Stereo */
  81         GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
  82       GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT},
  83   {                             /* Stereo + Centre */
  84         GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
  85         GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
  86       GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER},
  87   {                             /* Quadraphonic */
  88         GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
  89         GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
  90         GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
  91         GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
  92       },
  93   {                             /* Stereo + Centre + rear stereo */
  94         GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
  95         GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
  96         GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
  97         GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
  98         GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
  99       },
 100   {                             /* Full 5.1 Surround */
 101         GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
 102         GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
 103         GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
 104         GST_AUDIO_CHANNEL_POSITION_LFE1,
 105         GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
 106         GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
 107       },
 108   {                             /* 6.1 Surround, in Vorbis spec since 2010-01-13 */
 109         GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
 110         GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
 111         GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
 112         GST_AUDIO_CHANNEL_POSITION_LFE1,
 113         GST_AUDIO_CHANNEL_POSITION_REAR_CENTER,
 114         GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT,
 115         GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT,
 116       },
 117   {                             /* 7.1 Surround, in Vorbis spec since 2010-01-13 */
 118         GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
 119         GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
 120         GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
 121         GST_AUDIO_CHANNEL_POSITION_LFE1,
 122         GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
 123         GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
 124         GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT,
 125         GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT,
 126       },
 127 };
 128
 129 #ifndef USE_TREMOLO
 130 /* gst[i] = vorbis[reorder_map[i]] */
 131 const gint gst_vorbis_reorder_map[][8] = {
 132   {0},
 133   {0, 1},
 134   {0, 2, 1},
 135   {0, 1, 2, 3},
 136   {0, 2, 1, 3, 4},
 137   {0, 2, 1, 4, 5, 3},
 138   {0, 2, 1, 5, 6, 4, 3},
 139   {0, 2, 1, 6, 7, 4, 5, 3}
 140 };
 141 #endif