/* * Copyright (c) 2011 Justin Ruggles * * This file is part of Libav. * * Libav is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * Libav is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * mov 'chan' tag reading/writing. * @author Justin Ruggles */ #ifndef AVFORMAT_MOV_CHAN_H #define AVFORMAT_MOV_CHAN_H #include <stdint.h> #include "libavcodec/avcodec.h" #include "avformat.h" /** * Get the channel layout for the specified channel layout tag. * * @param[in] tag channel layout tag * @param[out] bitmap channel bitmap (only used if needed) * @return channel layout */ uint64_t ff_mov_get_channel_layout(uint32_t tag, uint32_t bitmap); /** * Get the channel layout tag for the specified codec id and channel layout. * If the layout tag was not found, use a channel bitmap if possible. * * @param[in] codec_id codec id * @param[in] channel_layout channel layout * @param[out] bitmap channel bitmap * @return channel layout tag */ uint32_t ff_mov_get_channel_layout_tag(enum AVCodecID codec_id, uint64_t channel_layout, uint32_t *bitmap); /** * Read 'chan' tag from the input stream. * * @param s AVFormatContext * @param pb AVIOContext * @param st The stream to set codec values for * @param size Remaining size in the 'chan' tag * @return 0 if ok, or negative AVERROR code on failure */ int ff_mov_read_chan(AVFormatContext *s, AVIOContext *pb, AVStream *st, int64_t size); #endif /* AVFORMAT_MOV_CHAN_H */