Libav 0.7.1
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00001 /* 00002 * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> 00003 * Copyright (c) 2008 Peter Ross 00004 * 00005 * This file is part of Libav. 00006 * 00007 * Libav is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU Lesser General Public 00009 * License as published by the Free Software Foundation; either 00010 * version 2.1 of the License, or (at your option) any later version. 00011 * 00012 * Libav is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * Lesser General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU Lesser General Public 00018 * License along with Libav; if not, write to the Free Software 00019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00020 */ 00021 00022 #ifndef AVUTIL_AUDIOCONVERT_H 00023 #define AVUTIL_AUDIOCONVERT_H 00024 00025 #include <stdint.h> 00026 00032 /* Audio channel masks */ 00033 #define AV_CH_FRONT_LEFT 0x00000001 00034 #define AV_CH_FRONT_RIGHT 0x00000002 00035 #define AV_CH_FRONT_CENTER 0x00000004 00036 #define AV_CH_LOW_FREQUENCY 0x00000008 00037 #define AV_CH_BACK_LEFT 0x00000010 00038 #define AV_CH_BACK_RIGHT 0x00000020 00039 #define AV_CH_FRONT_LEFT_OF_CENTER 0x00000040 00040 #define AV_CH_FRONT_RIGHT_OF_CENTER 0x00000080 00041 #define AV_CH_BACK_CENTER 0x00000100 00042 #define AV_CH_SIDE_LEFT 0x00000200 00043 #define AV_CH_SIDE_RIGHT 0x00000400 00044 #define AV_CH_TOP_CENTER 0x00000800 00045 #define AV_CH_TOP_FRONT_LEFT 0x00001000 00046 #define AV_CH_TOP_FRONT_CENTER 0x00002000 00047 #define AV_CH_TOP_FRONT_RIGHT 0x00004000 00048 #define AV_CH_TOP_BACK_LEFT 0x00008000 00049 #define AV_CH_TOP_BACK_CENTER 0x00010000 00050 #define AV_CH_TOP_BACK_RIGHT 0x00020000 00051 #define AV_CH_STEREO_LEFT 0x20000000 ///< Stereo downmix. 00052 #define AV_CH_STEREO_RIGHT 0x40000000 ///< See AV_CH_STEREO_LEFT. 00053 00057 #define AV_CH_LAYOUT_NATIVE 0x8000000000000000LL 00058 00059 /* Audio channel convenience macros */ 00060 #define AV_CH_LAYOUT_MONO (AV_CH_FRONT_CENTER) 00061 #define AV_CH_LAYOUT_STEREO (AV_CH_FRONT_LEFT|AV_CH_FRONT_RIGHT) 00062 #define AV_CH_LAYOUT_2_1 (AV_CH_LAYOUT_STEREO|AV_CH_BACK_CENTER) 00063 #define AV_CH_LAYOUT_SURROUND (AV_CH_LAYOUT_STEREO|AV_CH_FRONT_CENTER) 00064 #define AV_CH_LAYOUT_4POINT0 (AV_CH_LAYOUT_SURROUND|AV_CH_BACK_CENTER) 00065 #define AV_CH_LAYOUT_2_2 (AV_CH_LAYOUT_STEREO|AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT) 00066 #define AV_CH_LAYOUT_QUAD (AV_CH_LAYOUT_STEREO|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT) 00067 #define AV_CH_LAYOUT_5POINT0 (AV_CH_LAYOUT_SURROUND|AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT) 00068 #define AV_CH_LAYOUT_5POINT1 (AV_CH_LAYOUT_5POINT0|AV_CH_LOW_FREQUENCY) 00069 #define AV_CH_LAYOUT_5POINT0_BACK (AV_CH_LAYOUT_SURROUND|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT) 00070 #define AV_CH_LAYOUT_5POINT1_BACK (AV_CH_LAYOUT_5POINT0_BACK|AV_CH_LOW_FREQUENCY) 00071 #define AV_CH_LAYOUT_7POINT0 (AV_CH_LAYOUT_5POINT0|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT) 00072 #define AV_CH_LAYOUT_7POINT1 (AV_CH_LAYOUT_5POINT1|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT) 00073 #define AV_CH_LAYOUT_7POINT1_WIDE (AV_CH_LAYOUT_5POINT1_BACK|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER) 00074 #define AV_CH_LAYOUT_STEREO_DOWNMIX (AV_CH_STEREO_LEFT|AV_CH_STEREO_RIGHT) 00075 00079 int64_t av_get_channel_layout(const char *name); 00080 00088 void av_get_channel_layout_string(char *buf, int buf_size, int nb_channels, int64_t channel_layout); 00089 00093 int av_get_channel_layout_nb_channels(int64_t channel_layout); 00094 00095 #endif /* AVUTIL_AUDIOCONVERT_H */