ffmpeg/libavfilter/video.c

158 lines
4.6 KiB
C

/*
* Copyright 2007 Bobby Bingham
* Copyright Stefano Sabatini <stefasab gmail com>
* Copyright Vitor Sessak <vitor1001 gmail com>
*
* 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 <string.h>
#include <stdio.h>
#include "libavutil/avassert.h"
#include "libavutil/buffer.h"
#include "libavutil/imgutils.h"
#include "libavutil/mem.h"
#include "avfilter.h"
#include "internal.h"
#include "video.h"
AVFrame *ff_null_get_video_buffer(AVFilterLink *link, int w, int h)
{
return ff_get_video_buffer(link->dst->outputs[0], w, h);
}
/* TODO: set the buffer's priv member to a context structure for the whole
* filter chain. This will allow for a buffer pool instead of the constant
* alloc & free cycle currently implemented. */
AVFrame *ff_default_get_video_buffer(AVFilterLink *link, int w, int h)
{
AVFrame *frame = av_frame_alloc();
int ret;
#if 0 //POOL
AVFilterPool *pool = link->pool;
if (pool) {
for (i = 0; i < POOL_SIZE; i++) {
picref = pool->pic[i];
if (picref && picref->buf->format == link->format && picref->buf->w == w && picref->buf->h == h) {
AVFilterBuffer *pic = picref->buf;
pool->pic[i] = NULL;
pool->count--;
av_assert0(!picref->video->qp_table);
picref->video->w = w;
picref->video->h = h;
picref->perms = full_perms;
picref->format = link->format;
pic->refcount = 1;
memcpy(picref->data, pic->data, sizeof(picref->data));
memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize));
pool->refcount++;
return picref;
}
}
} else {
pool = link->pool = av_mallocz(sizeof(AVFilterPool));
pool->refcount = 1;
}
#endif
if (!frame)
return NULL;
frame->width = w;
frame->height = h;
frame->format = link->format;
ret = av_frame_get_buffer(frame, 32);
if (ret < 0)
av_frame_free(&frame);
#if 0 //POOL
memset(data[0], 128, i);
picref->buf->priv = pool;
picref->buf->free = NULL;
pool->refcount++;
#endif
return frame;
}
#if FF_API_AVFILTERBUFFER
AVFilterBufferRef *
avfilter_get_video_buffer_ref_from_arrays(uint8_t * const data[4], const int linesize[4], int perms,
int w, int h, enum AVPixelFormat format)
{
AVFilterBuffer *pic = av_mallocz(sizeof(AVFilterBuffer));
AVFilterBufferRef *picref = av_mallocz(sizeof(AVFilterBufferRef));
if (!pic || !picref)
goto fail;
picref->buf = pic;
picref->buf->free = ff_avfilter_default_free_buffer;
if (!(picref->video = av_mallocz(sizeof(AVFilterBufferRefVideoProps))))
goto fail;
pic->w = picref->video->w = w;
pic->h = picref->video->h = h;
/* make sure the buffer gets read permission or it's useless for output */
picref->perms = perms | AV_PERM_READ;
pic->refcount = 1;
picref->type = AVMEDIA_TYPE_VIDEO;
pic->format = picref->format = format;
memcpy(pic->data, data, 4*sizeof(data[0]));
memcpy(pic->linesize, linesize, 4*sizeof(linesize[0]));
memcpy(picref->data, pic->data, sizeof(picref->data));
memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize));
pic-> extended_data = pic->data;
picref->extended_data = picref->data;
picref->pts = AV_NOPTS_VALUE;
return picref;
fail:
if (picref && picref->video)
av_free(picref->video);
av_free(picref);
av_free(pic);
return NULL;
}
#endif
AVFrame *ff_get_video_buffer(AVFilterLink *link, int w, int h)
{
AVFrame *ret = NULL;
av_unused char buf[16];
FF_TPRINTF_START(NULL, get_video_buffer); ff_tlog_link(NULL, link, 0);
if (link->dstpad->get_video_buffer)
ret = link->dstpad->get_video_buffer(link, w, h);
if (!ret)
ret = ff_default_get_video_buffer(link, w, h);
return ret;
}