1
0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-07 11:13:41 +02:00
FFmpeg/libavfilter/framequeue.c
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h
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>
2024-03-31 00:08:43 +01:00

153 lines
4.4 KiB
C

/*
* Generic frame queue
* Copyright (c) 2016 Nicolas George
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with FFmpeg; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/avassert.h"
#include "libavutil/mem.h"
#include "framequeue.h"
static inline FFFrameBucket *bucket(FFFrameQueue *fq, size_t idx)
{
return &fq->queue[(fq->tail + idx) & (fq->allocated - 1)];
}
void ff_framequeue_global_init(FFFrameQueueGlobal *fqg)
{
}
static void check_consistency(FFFrameQueue *fq)
{
#if defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
uint64_t nb_samples = 0;
size_t i;
av_assert0(fq->queued == fq->total_frames_head - fq->total_frames_tail);
for (i = 0; i < fq->queued; i++)
nb_samples += bucket(fq, i)->frame->nb_samples;
av_assert0(nb_samples == fq->total_samples_head - fq->total_samples_tail);
#endif
}
void ff_framequeue_init(FFFrameQueue *fq, FFFrameQueueGlobal *fqg)
{
fq->queue = &fq->first_bucket;
fq->allocated = 1;
}
void ff_framequeue_free(FFFrameQueue *fq)
{
while (fq->queued) {
AVFrame *frame = ff_framequeue_take(fq);
av_frame_free(&frame);
}
if (fq->queue != &fq->first_bucket)
av_freep(&fq->queue);
}
int ff_framequeue_add(FFFrameQueue *fq, AVFrame *frame)
{
FFFrameBucket *b;
check_consistency(fq);
if (fq->queued == fq->allocated) {
if (fq->allocated == 1) {
size_t na = 8;
FFFrameBucket *nq = av_realloc_array(NULL, na, sizeof(*nq));
if (!nq)
return AVERROR(ENOMEM);
nq[0] = fq->queue[0];
fq->queue = nq;
fq->allocated = na;
} else {
size_t na = fq->allocated << 1;
FFFrameBucket *nq = av_realloc_array(fq->queue, na, sizeof(*nq));
if (!nq)
return AVERROR(ENOMEM);
if (fq->tail)
memmove(nq + fq->allocated, nq, fq->tail * sizeof(*nq));
fq->queue = nq;
fq->allocated = na;
}
}
b = bucket(fq, fq->queued);
b->frame = frame;
fq->queued++;
fq->total_frames_head++;
fq->total_samples_head += frame->nb_samples;
check_consistency(fq);
return 0;
}
AVFrame *ff_framequeue_take(FFFrameQueue *fq)
{
FFFrameBucket *b;
check_consistency(fq);
av_assert1(fq->queued);
b = bucket(fq, 0);
fq->queued--;
fq->tail++;
fq->tail &= fq->allocated - 1;
fq->total_frames_tail++;
fq->total_samples_tail += b->frame->nb_samples;
fq->samples_skipped = 0;
check_consistency(fq);
return b->frame;
}
AVFrame *ff_framequeue_peek(FFFrameQueue *fq, size_t idx)
{
FFFrameBucket *b;
check_consistency(fq);
av_assert1(idx < fq->queued);
b = bucket(fq, idx);
check_consistency(fq);
return b->frame;
}
void ff_framequeue_skip_samples(FFFrameQueue *fq, size_t samples, AVRational time_base)
{
FFFrameBucket *b;
size_t bytes;
int planar, planes, i;
check_consistency(fq);
av_assert1(fq->queued);
b = bucket(fq, 0);
av_assert1(samples < b->frame->nb_samples);
planar = av_sample_fmt_is_planar(b->frame->format);
planes = planar ? b->frame->ch_layout.nb_channels : 1;
bytes = samples * av_get_bytes_per_sample(b->frame->format);
if (!planar)
bytes *= b->frame->ch_layout.nb_channels;
if (b->frame->pts != AV_NOPTS_VALUE)
b->frame->pts += av_rescale_q(samples, av_make_q(1, b->frame->sample_rate), time_base);
b->frame->nb_samples -= samples;
b->frame->linesize[0] -= bytes;
for (i = 0; i < planes; i++)
b->frame->extended_data[i] += bytes;
for (i = 0; i < planes && i < AV_NUM_DATA_POINTERS; i++)
b->frame->data[i] = b->frame->extended_data[i];
fq->total_samples_tail += samples;
fq->samples_skipped = 1;
ff_framequeue_update_peeked(fq, 0);
}