forked from mirrors/gecko-dev
bbbd3c280f
Backed out changeset ce0c34e548fa (bug 1889978) Backed out changeset 96e08e04fa4d (bug 1889978) Backed out changeset 2aeb87615ee0 (bug 1889978) Backed out changeset 2272c3a73ad3 (bug 1889978) Backed out changeset dc81d0c812b8 (bug 1889978)
113 lines
3.9 KiB
C
113 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/common.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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