1 /* 2 * audio interleaving prototypes and declarations 3 * 4 * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com> 5 * 6 * This file is part of FFmpeg. 7 * 8 * FFmpeg is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public 10 * License as published by the Free Software Foundation; either 11 * version 2.1 of the License, or (at your option) any later version. 12 * 13 * FFmpeg is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public 19 * License along with FFmpeg; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ 22 23 #ifndef AVFORMAT_AUDIOINTERLEAVE_H 24 #define AVFORMAT_AUDIOINTERLEAVE_H 25 26 #include "libavutil/fifo.h" 27 #include "avformat.h" 28 29 typedef struct AudioInterleaveContext { 30 AVFifoBuffer *fifo; 31 unsigned fifo_size; ///< size of currently allocated FIFO 32 uint64_t dts; ///< current dts 33 int sample_size; ///< size of one sample all channels included 34 const int *samples_per_frame; ///< must be 0-terminated 35 const int *samples; ///< current samples per frame, pointer to samples_per_frame 36 AVRational time_base; ///< time base of output audio packets 37 } AudioInterleaveContext; 38 39 int ff_audio_interleave_init(AVFormatContext *s, const int *samples_per_frame, AVRational time_base); 40 void ff_audio_interleave_close(AVFormatContext *s); 41 42 /** 43 * Rechunk audio PCM packets per AudioInterleaveContext->samples_per_frame 44 * and interleave them correctly. 45 * The first element of AVStream->priv_data must be AudioInterleaveContext 46 * when using this function. 47 * 48 * @param get_packet function will output a packet when streams are correctly interleaved. 49 * @param compare_ts function will compare AVPackets and decide interleaving order. 50 */ 51 int ff_audio_rechunk_interleave(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush, 52 int (*get_packet)(AVFormatContext *, AVPacket *, AVPacket *, int), 53 int (*compare_ts)(AVFormatContext *, AVPacket *, AVPacket *)); 54 55 #endif /* AVFORMAT_AUDIOINTERLEAVE_H */ 56