/*
  * 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 */