yading@10: /*
yading@10:  * Audio Frame Queue
yading@10:  * Copyright (c) 2012 Justin Ruggles
yading@10:  *
yading@10:  * This file is part of Libav.
yading@10:  *
yading@10:  * Libav is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * Libav is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with Libav; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: #ifndef AVCODEC_AUDIO_FRAME_QUEUE_H
yading@10: #define AVCODEC_AUDIO_FRAME_QUEUE_H
yading@10: 
yading@10: #include "avcodec.h"
yading@10: 
yading@10: typedef struct AudioFrame {
yading@10:     int64_t pts;
yading@10:     int duration;
yading@10: } AudioFrame;
yading@10: 
yading@10: typedef struct AudioFrameQueue {
yading@10:     AVCodecContext *avctx;
yading@10:     int remaining_delay;
yading@10:     int remaining_samples;
yading@10:     AudioFrame *frames;
yading@10:     unsigned frame_count;
yading@10:     unsigned frame_alloc;
yading@10: } AudioFrameQueue;
yading@10: 
yading@10: /**
yading@10:  * Initialize AudioFrameQueue.
yading@10:  *
yading@10:  * @param avctx context to use for time_base and av_log
yading@10:  * @param afq   queue context
yading@10:  */
yading@10: void ff_af_queue_init(AVCodecContext *avctx, AudioFrameQueue *afq);
yading@10: 
yading@10: /**
yading@10:  * Close AudioFrameQueue.
yading@10:  *
yading@10:  * Frees memory if needed.
yading@10:  *
yading@10:  * @param afq queue context
yading@10:  */
yading@10: void ff_af_queue_close(AudioFrameQueue *afq);
yading@10: 
yading@10: /**
yading@10:  * Add a frame to the queue.
yading@10:  *
yading@10:  * @param afq queue context
yading@10:  * @param f   frame to add to the queue
yading@10:  */
yading@10: int ff_af_queue_add(AudioFrameQueue *afq, const AVFrame *f);
yading@10: 
yading@10: /**
yading@10:  * Remove frame(s) from the queue.
yading@10:  *
yading@10:  * Retrieves the pts of the next available frame, or a generated pts based on
yading@10:  * the last frame duration if there are no frames left in the queue. The number
yading@10:  * of requested samples should be the full number of samples represented by the
yading@10:  * packet that will be output by the encoder. If fewer samples are available
yading@10:  * in the queue, a smaller value will be used for the output duration.
yading@10:  *
yading@10:  * @param afq           queue context
yading@10:  * @param nb_samples    number of samples to remove from the queue
yading@10:  * @param[out] pts      output packet pts
yading@10:  * @param[out] duration output packet duration
yading@10:  */
yading@10: void ff_af_queue_remove(AudioFrameQueue *afq, int nb_samples, int64_t *pts,
yading@10:                         int *duration);
yading@10: 
yading@10: #endif /* AVCODEC_AUDIO_FRAME_QUEUE_H */