3 * Copyright (c) 2012 Justin Ruggles
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/attributes.h"
23 #include "libavutil/common.h"
24 #include "audio_frame_queue.h"
26 #include "libavutil/avassert.h"
28 av_cold void ff_af_queue_init(AVCodecContext *avctx, AudioFrameQueue *afq)
31 afq->remaining_delay = avctx->delay;
32 afq->remaining_samples = avctx->delay;
36 void ff_af_queue_close(AudioFrameQueue *afq)
39 av_log(afq->avctx, AV_LOG_WARNING, "%d frames left in the queue on closing\n", afq->frame_count);
40 av_freep(&afq->frames);
41 memset(afq, 0, sizeof(*afq));
44 int ff_af_queue_add(AudioFrameQueue *afq, const AVFrame *f)
46 AudioFrame *new = av_fast_realloc(afq->frames, &afq->frame_alloc, sizeof(*afq->frames)*(afq->frame_count+1));
48 return AVERROR(ENOMEM);
50 new += afq->frame_count;
52 /* get frame parameters */
53 new->duration = f->nb_samples;
54 new->duration += afq->remaining_delay;
55 if (f->pts != AV_NOPTS_VALUE) {
56 new->pts = av_rescale_q(f->pts,
57 afq->avctx->time_base,
58 (AVRational){ 1, afq->avctx->sample_rate });
59 new->pts -= afq->remaining_delay;
60 if(afq->frame_count && new[-1].pts >= new->pts)
61 av_log(afq->avctx, AV_LOG_WARNING, "Queue input is backward in time\n");
63 new->pts = AV_NOPTS_VALUE;
65 afq->remaining_delay = 0;
67 /* add frame sample count */
68 afq->remaining_samples += f->nb_samples;
75 void ff_af_queue_remove(AudioFrameQueue *afq, int nb_samples, int64_t *pts,
78 int64_t out_pts = AV_NOPTS_VALUE;
79 int removed_samples = 0;
82 if (afq->frame_count || afq->frame_alloc) {
83 if (afq->frames->pts != AV_NOPTS_VALUE)
84 out_pts = afq->frames->pts;
87 av_log(afq->avctx, AV_LOG_WARNING, "Trying to remove %d samples, but the queue is empty\n", nb_samples);
89 *pts = ff_samples_to_time_base(afq->avctx, out_pts);
91 for(i=0; nb_samples && i<afq->frame_count; i++){
92 int n= FFMIN(afq->frames[i].duration, nb_samples);
93 afq->frames[i].duration -= n;
96 if(afq->frames[i].pts != AV_NOPTS_VALUE)
97 afq->frames[i].pts += n;
99 afq->remaining_samples -= removed_samples;
100 i -= i && afq->frames[i-1].duration;
101 memmove(afq->frames, afq->frames + i, sizeof(*afq->frames) * (afq->frame_count - i));
102 afq->frame_count -= i;
105 av_assert0(!afq->frame_count);
106 av_assert0(afq->remaining_samples == afq->remaining_delay);
107 if(afq->frames && afq->frames[0].pts != AV_NOPTS_VALUE)
108 afq->frames[0].pts += nb_samples;
109 av_log(afq->avctx, AV_LOG_DEBUG, "Trying to remove %d more samples than there are in the queue\n", nb_samples);
112 *duration = ff_samples_to_time_base(afq->avctx, removed_samples);