/* * Audio Frame Queue * Copyright (c) 2012 Justin Ruggles * * This file is part of FFmpeg. * * FFmpeg 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. * * FFmpeg 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 FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef AVCODEC_AUDIO_FRAME_QUEUE_H#define AVCODEC_AUDIO_FRAME_QUEUE_H #include "avcodec.h" typedef struct AudioFrame {    int64_t pts;    int duration;} AudioFrame; typedef struct AudioFrameQueue {    AVCodecContext *avctx;    int remaining_delay;    int remaining_samples;    AudioFrame *frames;    unsigned frame_count;    unsigned frame_alloc;} AudioFrameQueue; /** * Initialize AudioFrameQueue. * * @param avctx context to use for time_base and av_log * @param afq   queue context */void ff_af_queue_init(AVCodecContext *avctx, AudioFrameQueue *afq); /** * Close AudioFrameQueue. * * Frees memory if needed. * * @param afq queue context */void ff_af_queue_close(AudioFrameQueue *afq); /** * Add a frame to the queue. * * @param afq queue context * @param f   frame to add to the queue */int ff_af_queue_add(AudioFrameQueue *afq, const AVFrame *f); /** * Remove frame(s) from the queue. * * Retrieves the pts of the next available frame, or a generated pts based on * the last frame duration if there are no frames left in the queue. The number * of requested samples should be the full number of samples represented by the * packet that will be output by the encoder. If fewer samples are available * in the queue, a smaller value will be used for the output duration. * * @param afq           queue context * @param nb_samples    number of samples to remove from the queue * @param[out] pts      output packet pts * @param[out] duration output packet duration */void ff_af_queue_remove(AudioFrameQueue *afq, int nb_samples, int64_t *pts,                        int *duration); #endif /* AVCODEC_AUDIO_FRAME_QUEUE_H */