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