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https://github.com/FFmpeg/FFmpeg.git
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790f793844
There are lots of files that don't need it: The number of object files that actually need it went down from 2011 to 884 here. Keep it for external users in order to not cause breakages. Also improve the other headers a bit while just at it. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
114 lines
3.9 KiB
C
114 lines
3.9 KiB
C
/*
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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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#include "libavutil/attributes.h"
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#include "libavutil/mem.h"
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#include "audio_frame_queue.h"
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#include "encode.h"
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#include "libavutil/avassert.h"
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av_cold void ff_af_queue_init(AVCodecContext *avctx, AudioFrameQueue *afq)
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{
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afq->avctx = avctx;
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afq->remaining_delay = avctx->initial_padding;
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afq->remaining_samples = avctx->initial_padding;
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afq->frame_count = 0;
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}
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void ff_af_queue_close(AudioFrameQueue *afq)
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{
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if(afq->frame_count)
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av_log(afq->avctx, AV_LOG_WARNING, "%d frames left in the queue on closing\n", afq->frame_count);
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av_freep(&afq->frames);
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memset(afq, 0, sizeof(*afq));
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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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AudioFrame *new = av_fast_realloc(afq->frames, &afq->frame_alloc, sizeof(*afq->frames)*(afq->frame_count+1));
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if(!new)
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return AVERROR(ENOMEM);
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afq->frames = new;
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new += afq->frame_count;
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/* get frame parameters */
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new->duration = f->nb_samples;
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new->duration += afq->remaining_delay;
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if (f->pts != AV_NOPTS_VALUE) {
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new->pts = av_rescale_q(f->pts,
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afq->avctx->time_base,
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(AVRational){ 1, afq->avctx->sample_rate });
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new->pts -= afq->remaining_delay;
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if(afq->frame_count && new[-1].pts >= new->pts)
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av_log(afq->avctx, AV_LOG_WARNING, "Queue input is backward in time\n");
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} else {
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new->pts = AV_NOPTS_VALUE;
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}
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afq->remaining_delay = 0;
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/* add frame sample count */
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afq->remaining_samples += f->nb_samples;
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afq->frame_count++;
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return 0;
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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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int64_t *duration)
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{
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int64_t out_pts = AV_NOPTS_VALUE;
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int removed_samples = 0;
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int i;
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if (afq->frame_count || afq->frame_alloc) {
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if (afq->frames->pts != AV_NOPTS_VALUE)
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out_pts = afq->frames->pts;
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}
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if(!afq->frame_count)
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av_log(afq->avctx, AV_LOG_WARNING, "Trying to remove %d samples, but the queue is empty\n", nb_samples);
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if (pts)
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*pts = ff_samples_to_time_base(afq->avctx, out_pts);
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for(i=0; nb_samples && i<afq->frame_count; i++){
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int n= FFMIN(afq->frames[i].duration, nb_samples);
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afq->frames[i].duration -= n;
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nb_samples -= n;
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removed_samples += n;
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if(afq->frames[i].pts != AV_NOPTS_VALUE)
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afq->frames[i].pts += n;
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}
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afq->remaining_samples -= removed_samples;
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i -= i && afq->frames[i-1].duration;
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memmove(afq->frames, afq->frames + i, sizeof(*afq->frames) * (afq->frame_count - i));
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afq->frame_count -= i;
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if(nb_samples){
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av_assert0(!afq->frame_count);
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av_assert0(afq->remaining_samples == afq->remaining_delay);
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if(afq->frames && afq->frames[0].pts != AV_NOPTS_VALUE)
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afq->frames[0].pts += nb_samples;
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av_log(afq->avctx, AV_LOG_DEBUG, "Trying to remove %d more samples than there are in the queue\n", nb_samples);
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}
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if (duration)
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*duration = ff_samples_to_time_base(afq->avctx, removed_samples);
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}
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