1/* 2 * Copyright (c) 2011 Justin Ruggles 3 * 4 * This file is part of Libav. 5 * 6 * Libav is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * Libav is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with Libav; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21/** 22 * mov 'chan' tag reading/writing. 23 * @author Justin Ruggles 24 */ 25 26#ifndef AVFORMAT_MOV_CHAN_H 27#define AVFORMAT_MOV_CHAN_H 28 29#include <stdint.h> 30 31#include "libavcodec/avcodec.h" 32 33/** 34 * Get the channel layout for the specified channel layout tag. 35 * 36 * @param[in] tag channel layout tag 37 * @param[out] bitmap channel bitmap (only used if needed) 38 * @return channel layout 39 */ 40uint64_t ff_mov_get_channel_layout(uint32_t tag, uint32_t bitmap); 41 42/** 43 * Get the channel layout for the specified channel layout tag. 44 * 45 * @param[in] tag channel label 46 * @return channel layout mask fragment 47 */ 48uint32_t ff_mov_get_channel_label(uint32_t label); 49 50/** 51 * Get the channel layout tag for the specified codec id and channel layout. 52 * If the layout tag was not found, use a channel bitmap if possible. 53 * 54 * @param[in] codec_id codec id 55 * @param[in] channel_layout channel layout 56 * @param[out] bitmap channel bitmap 57 * @return channel layout tag 58 */ 59uint32_t ff_mov_get_channel_layout_tag(enum CodecID codec_id, 60 uint64_t channel_layout, 61 uint32_t *bitmap); 62 63#endif /* AVFORMAT_MOV_CHAN_H */ 64