1 /* 2 * Copyright (c) 2011 Justin Ruggles 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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 #include "avformat.h" 33 34 /** 35 * Get the channel layout for the specified channel layout tag. 36 * 37 * @param[in] tag channel layout tag 38 * @param[out] bitmap channel bitmap (only used if needed) 39 * @return channel layout 40 */ 41 uint64_t ff_mov_get_channel_layout(uint32_t tag, uint32_t bitmap); 42 43 /** 44 * Get the channel layout tag for the specified codec id and channel layout. 45 * If the layout tag was not found, use a channel bitmap if possible. 46 * 47 * @param[in] codec_id codec id 48 * @param[in] channel_layout channel layout 49 * @param[out] bitmap channel bitmap 50 * @return channel layout tag 51 */ 52 uint32_t ff_mov_get_channel_layout_tag(enum AVCodecID codec_id, 53 uint64_t channel_layout, 54 uint32_t *bitmap); 55 56 /** 57 * Read 'chan' tag from the input stream. 58 * 59 * @param s AVFormatContext 60 * @param pb AVIOContext 61 * @param st The stream to set codec values for 62 * @param size Remaining size in the 'chan' tag 63 * @return 0 if ok, or negative AVERROR code on failure 64 */ 65 int ff_mov_read_chan(AVFormatContext *s, AVIOContext *pb, AVStream *st, 66 int64_t size); 67 68 #endif /* AVFORMAT_MOV_CHAN_H */ 69