mirror of
https://github.com/FFmpeg/FFmpeg.git
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118 lines
3.3 KiB
C
118 lines
3.3 KiB
C
/*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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 <string.h>
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#include <stdio.h>
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#include "libavutil/buffer.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/mem.h"
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#include "avfilter.h"
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#include "internal.h"
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#include "video.h"
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AVFrame *ff_null_get_video_buffer(AVFilterLink *link, int w, int h)
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{
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return ff_get_video_buffer(link->dst->outputs[0], w, h);
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}
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/* TODO: set the buffer's priv member to a context structure for the whole
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* filter chain. This will allow for a buffer pool instead of the constant
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* alloc & free cycle currently implemented. */
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AVFrame *ff_default_get_video_buffer(AVFilterLink *link, int w, int h)
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{
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AVFrame *frame = av_frame_alloc();
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int ret;
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if (!frame)
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return NULL;
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frame->width = w;
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frame->height = h;
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frame->format = link->format;
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ret = av_frame_get_buffer(frame, 32);
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if (ret < 0)
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av_frame_free(&frame);
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return frame;
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}
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#if FF_API_AVFILTERBUFFER
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AVFilterBufferRef *
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avfilter_get_video_buffer_ref_from_arrays(uint8_t *data[4], int linesize[4], int perms,
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int w, int h, enum AVPixelFormat format)
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{
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AVFilterBuffer *pic = av_mallocz(sizeof(AVFilterBuffer));
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AVFilterBufferRef *picref = av_mallocz(sizeof(AVFilterBufferRef));
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if (!pic || !picref)
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goto fail;
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picref->buf = pic;
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picref->buf->free = ff_avfilter_default_free_buffer;
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if (!(picref->video = av_mallocz(sizeof(AVFilterBufferRefVideoProps))))
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goto fail;
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pic->w = picref->video->w = w;
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pic->h = picref->video->h = h;
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/* make sure the buffer gets read permission or it's useless for output */
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picref->perms = perms | AV_PERM_READ;
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pic->refcount = 1;
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picref->type = AVMEDIA_TYPE_VIDEO;
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pic->format = picref->format = format;
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memcpy(pic->data, data, 4*sizeof(data[0]));
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memcpy(pic->linesize, linesize, 4*sizeof(linesize[0]));
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memcpy(picref->data, pic->data, sizeof(picref->data));
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memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize));
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pic-> extended_data = pic->data;
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picref->extended_data = picref->data;
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picref->pts = AV_NOPTS_VALUE;
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return picref;
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fail:
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if (picref && picref->video)
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av_free(picref->video);
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av_free(picref);
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av_free(pic);
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return NULL;
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}
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#endif
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AVFrame *ff_get_video_buffer(AVFilterLink *link, int w, int h)
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{
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AVFrame *ret = NULL;
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FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0);
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if (link->dstpad->get_video_buffer)
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ret = link->dstpad->get_video_buffer(link, w, h);
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if (!ret)
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ret = ff_default_get_video_buffer(link, w, h);
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return ret;
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}
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