737eb5976f
It is pretty hopeless that other considerable projects will adopt libavutil alone in other projects. Projects that need small footprint are better off with more specialized libraries such as gnulib or rather just copy the necessary parts that they need. With this in mind, nobody is helped by having libavutil and libavcore split. In order to ease maintenance inside and around FFmpeg and to reduce confusion where to put common code, avcore's functionality is merged (back) to avutil. Signed-off-by: Reinhard Tartler <siretart@tauware.de>
96 lines
4.2 KiB
C
96 lines
4.2 KiB
C
/*
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* Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
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* Copyright (c) 2008 Peter Ross
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVUTIL_AUDIOCONVERT_H
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#define AVUTIL_AUDIOCONVERT_H
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#include <stdint.h>
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/**
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* @file
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* audio conversion routines
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*/
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/* Audio channel masks */
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#define AV_CH_FRONT_LEFT 0x00000001
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#define AV_CH_FRONT_RIGHT 0x00000002
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#define AV_CH_FRONT_CENTER 0x00000004
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#define AV_CH_LOW_FREQUENCY 0x00000008
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#define AV_CH_BACK_LEFT 0x00000010
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#define AV_CH_BACK_RIGHT 0x00000020
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#define AV_CH_FRONT_LEFT_OF_CENTER 0x00000040
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#define AV_CH_FRONT_RIGHT_OF_CENTER 0x00000080
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#define AV_CH_BACK_CENTER 0x00000100
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#define AV_CH_SIDE_LEFT 0x00000200
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#define AV_CH_SIDE_RIGHT 0x00000400
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#define AV_CH_TOP_CENTER 0x00000800
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#define AV_CH_TOP_FRONT_LEFT 0x00001000
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#define AV_CH_TOP_FRONT_CENTER 0x00002000
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#define AV_CH_TOP_FRONT_RIGHT 0x00004000
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#define AV_CH_TOP_BACK_LEFT 0x00008000
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#define AV_CH_TOP_BACK_CENTER 0x00010000
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#define AV_CH_TOP_BACK_RIGHT 0x00020000
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#define AV_CH_STEREO_LEFT 0x20000000 ///< Stereo downmix.
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#define AV_CH_STEREO_RIGHT 0x40000000 ///< See AV_CH_STEREO_LEFT.
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/** Channel mask value used for AVCodecContext.request_channel_layout
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to indicate that the user requests the channel order of the decoder output
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to be the native codec channel order. */
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#define AV_CH_LAYOUT_NATIVE 0x8000000000000000LL
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/* Audio channel convenience macros */
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#define AV_CH_LAYOUT_MONO (AV_CH_FRONT_CENTER)
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#define AV_CH_LAYOUT_STEREO (AV_CH_FRONT_LEFT|AV_CH_FRONT_RIGHT)
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#define AV_CH_LAYOUT_2_1 (AV_CH_LAYOUT_STEREO|AV_CH_BACK_CENTER)
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#define AV_CH_LAYOUT_SURROUND (AV_CH_LAYOUT_STEREO|AV_CH_FRONT_CENTER)
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#define AV_CH_LAYOUT_4POINT0 (AV_CH_LAYOUT_SURROUND|AV_CH_BACK_CENTER)
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#define AV_CH_LAYOUT_2_2 (AV_CH_LAYOUT_STEREO|AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT)
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#define AV_CH_LAYOUT_QUAD (AV_CH_LAYOUT_STEREO|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
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#define AV_CH_LAYOUT_5POINT0 (AV_CH_LAYOUT_SURROUND|AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT)
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#define AV_CH_LAYOUT_5POINT1 (AV_CH_LAYOUT_5POINT0|AV_CH_LOW_FREQUENCY)
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#define AV_CH_LAYOUT_5POINT0_BACK (AV_CH_LAYOUT_SURROUND|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
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#define AV_CH_LAYOUT_5POINT1_BACK (AV_CH_LAYOUT_5POINT0_BACK|AV_CH_LOW_FREQUENCY)
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#define AV_CH_LAYOUT_7POINT0 (AV_CH_LAYOUT_5POINT0|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
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#define AV_CH_LAYOUT_7POINT1 (AV_CH_LAYOUT_5POINT1|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
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#define AV_CH_LAYOUT_7POINT1_WIDE (AV_CH_LAYOUT_5POINT1_BACK|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
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#define AV_CH_LAYOUT_STEREO_DOWNMIX (AV_CH_STEREO_LEFT|AV_CH_STEREO_RIGHT)
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/**
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* Return a channel layout id that matches name, 0 if no match.
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*/
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int64_t av_get_channel_layout(const char *name);
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/**
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* Return a description of a channel layout.
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* If nb_channels is <= 0, it is guessed from the channel_layout.
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*
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* @param buf put here the string containing the channel layout
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* @param buf_size size in bytes of the buffer
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*/
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void av_get_channel_layout_string(char *buf, int buf_size, int nb_channels, int64_t channel_layout);
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/**
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* Return the number of channels in the channel layout.
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*/
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int av_get_channel_layout_nb_channels(int64_t channel_layout);
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#endif /* AVUTIL_AUDIOCONVERT_H */
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