audio_frame_queue.h (2506B)
1 /* 2 * Audio Frame Queue 3 * Copyright (c) 2012 Justin Ruggles 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22 #ifndef AVCODEC_AUDIO_FRAME_QUEUE_H 23 #define AVCODEC_AUDIO_FRAME_QUEUE_H 24 25 #include "avcodec.h" 26 27 typedef struct AudioFrame { 28 int64_t pts; 29 int duration; 30 } AudioFrame; 31 32 typedef struct AudioFrameQueue { 33 AVCodecContext *avctx; 34 int remaining_delay; 35 int remaining_samples; 36 AudioFrame *frames; 37 unsigned frame_count; 38 unsigned frame_alloc; 39 } AudioFrameQueue; 40 41 /** 42 * Initialize AudioFrameQueue. 43 * 44 * @param avctx context to use for time_base and av_log 45 * @param afq queue context 46 */ 47 void ff_af_queue_init(AVCodecContext *avctx, AudioFrameQueue *afq); 48 49 /** 50 * Close AudioFrameQueue. 51 * 52 * Frees memory if needed. 53 * 54 * @param afq queue context 55 */ 56 void ff_af_queue_close(AudioFrameQueue *afq); 57 58 /** 59 * Add a frame to the queue. 60 * 61 * @param afq queue context 62 * @param f frame to add to the queue 63 */ 64 int ff_af_queue_add(AudioFrameQueue *afq, const AVFrame *f); 65 66 /** 67 * Remove frame(s) from the queue. 68 * 69 * Retrieves the pts of the next available frame, or a generated pts based on 70 * the last frame duration if there are no frames left in the queue. The number 71 * of requested samples should be the full number of samples represented by the 72 * packet that will be output by the encoder. If fewer samples are available 73 * in the queue, a smaller value will be used for the output duration. 74 * 75 * @param afq queue context 76 * @param nb_samples number of samples to remove from the queue 77 * @param[out] pts output packet pts 78 * @param[out] duration output packet duration 79 */ 80 void ff_af_queue_remove(AudioFrameQueue *afq, int nb_samples, int64_t *pts, 81 int64_t *duration); 82 83 #endif /* AVCODEC_AUDIO_FRAME_QUEUE_H */