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libavcodec
audio_frame_queue.h
Go to the documentation of this file.
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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 FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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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}
AudioFrame
;
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typedef
struct
AudioFrameQueue
{
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AVCodecContext
*
avctx
;
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int
remaining_delay
;
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int
remaining_samples
;
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AudioFrame
*
frames
;
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unsigned
frame_count
;
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unsigned
frame_alloc
;
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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 */
AVFrame
This structure describes decoded (raw) audio or video data.
Definition:
frame.h:171
AudioFrame::pts
int64_t pts
Definition:
audio_frame_queue.h:28
AudioFrameQueue::frames
AudioFrame * frames
Definition:
audio_frame_queue.h:36
AudioFrameQueue::remaining_delay
int remaining_delay
Definition:
audio_frame_queue.h:34
AudioFrameQueue::remaining_samples
int remaining_samples
Definition:
audio_frame_queue.h:35
duration
static int64_t duration
Definition:
ffplay.c:321
avcodec.h
Libavcodec external API header.
ff_af_queue_remove
void ff_af_queue_remove(AudioFrameQueue *afq, int nb_samples, int64_t *pts, int *duration)
Remove frame(s) from the queue.
Definition:
audio_frame_queue.c:75
AudioFrameQueue::avctx
AVCodecContext * avctx
Definition:
audio_frame_queue.h:33
ff_af_queue_close
void ff_af_queue_close(AudioFrameQueue *afq)
Close AudioFrameQueue.
Definition:
audio_frame_queue.c:36
AudioFrame
Definition:
audio_frame_queue.h:27
AudioFrameQueue::frame_count
unsigned frame_count
Definition:
audio_frame_queue.h:37
AudioFrameQueue
Definition:
audio_frame_queue.h:32
ff_af_queue_init
void ff_af_queue_init(AVCodecContext *avctx, AudioFrameQueue *afq)
Initialize AudioFrameQueue.
Definition:
audio_frame_queue.c:28
AudioFrameQueue::frame_alloc
unsigned frame_alloc
Definition:
audio_frame_queue.h:38
AVCodecContext
main external API structure.
Definition:
avcodec.h:1241
pts
static int64_t pts
Global timestamp for the audio frames.
Definition:
transcode_aac.c:547
AudioFrame::duration
int duration
Definition:
audio_frame_queue.h:29
ff_af_queue_add
int ff_af_queue_add(AudioFrameQueue *afq, const AVFrame *f)
Add a frame to the queue.
Definition:
audio_frame_queue.c:44
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