| 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 */ |