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/common.h"
23 #include "audio_frame_queue.h"
25 #include "libavutil/avassert.h"
27 void ff_af_queue_init(AVCodecContext *avctx, AudioFrameQueue *afq)
30 afq->remaining_delay = avctx->delay;
31 afq->remaining_samples = avctx->delay;
35 void ff_af_queue_close(AudioFrameQueue *afq)
38 av_log(afq->avctx, AV_LOG_WARNING, "%d frames left in que on closing\n", afq->frame_count);
39 av_freep(&afq->frames);
40 memset(afq, 0, sizeof(*afq));
43 int ff_af_queue_add(AudioFrameQueue *afq, const AVFrame *f)
45 AudioFrame *new = av_fast_realloc(afq->frames, &afq->frame_alloc, sizeof(*afq->frames)*(afq->frame_count+1));
47 return AVERROR(ENOMEM);
49 new += afq->frame_count;
51 /* get frame parameters */
52 new->duration = f->nb_samples;
53 new->duration += afq->remaining_delay;
54 if (f->pts != AV_NOPTS_VALUE) {
55 new->pts = av_rescale_q(f->pts,
56 afq->avctx->time_base,
57 (AVRational){ 1, afq->avctx->sample_rate });
58 new->pts -= afq->remaining_delay;
59 if(afq->frame_count && new[-1].pts >= new->pts)
60 av_log(afq->avctx, AV_LOG_WARNING, "Que input is backward in time\n");
62 new->pts = AV_NOPTS_VALUE;
64 afq->remaining_delay = 0;
66 /* add frame sample count */
67 afq->remaining_samples += f->nb_samples;
74 void ff_af_queue_remove(AudioFrameQueue *afq, int nb_samples, int64_t *pts,
77 int64_t out_pts = AV_NOPTS_VALUE;
78 int removed_samples = 0;
81 if (afq->frame_count || afq->frame_alloc) {
82 if (afq->frames->pts != AV_NOPTS_VALUE)
83 out_pts = afq->frames->pts;
86 av_log(afq->avctx, AV_LOG_WARNING, "Trying to remove %d samples, but que empty\n", nb_samples);
88 *pts = ff_samples_to_time_base(afq->avctx, out_pts);
90 for(i=0; nb_samples && i<afq->frame_count; i++){
91 int n= FFMIN(afq->frames[i].duration, nb_samples);
92 afq->frames[i].duration -= n;
95 if(afq->frames[i].pts != AV_NOPTS_VALUE)
96 afq->frames[i].pts += n;
98 afq->remaining_samples -= removed_samples;
99 i -= i && afq->frames[i-1].duration;
100 memmove(afq->frames, afq->frames + i, sizeof(*afq->frames) * (afq->frame_count - i));
101 afq->frame_count -= i;
104 av_assert0(!afq->frame_count);
105 av_assert0(afq->remaining_samples == afq->remaining_delay);
106 if(afq->frames && afq->frames[0].pts != AV_NOPTS_VALUE)
107 afq->frames[0].pts += nb_samples;
108 av_log(afq->avctx, AV_LOG_DEBUG, "Trying to remove %d more samples than are in the que\n", nb_samples);
111 *duration = ff_samples_to_time_base(afq->avctx, removed_samples);