2 * This file is part of Libav.
4 * Libav is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * Libav is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/buffer.h"
23 #include "libavutil/imgutils.h"
24 #include "libavutil/mem.h"
30 AVFrame *ff_null_get_video_buffer(AVFilterLink *link, int w, int h)
32 return ff_get_video_buffer(link->dst->outputs[0], w, h);
35 /* TODO: set the buffer's priv member to a context structure for the whole
36 * filter chain. This will allow for a buffer pool instead of the constant
37 * alloc & free cycle currently implemented. */
38 AVFrame *ff_default_get_video_buffer(AVFilterLink *link, int w, int h)
40 AVFrame *frame = av_frame_alloc();
48 frame->format = link->format;
50 ret = av_frame_get_buffer(frame, 32);
52 av_frame_free(&frame);
57 #if FF_API_AVFILTERBUFFER
59 avfilter_get_video_buffer_ref_from_arrays(uint8_t *data[4], int linesize[4], int perms,
60 int w, int h, enum AVPixelFormat format)
62 AVFilterBuffer *pic = av_mallocz(sizeof(AVFilterBuffer));
63 AVFilterBufferRef *picref = av_mallocz(sizeof(AVFilterBufferRef));
69 picref->buf->free = ff_avfilter_default_free_buffer;
70 if (!(picref->video = av_mallocz(sizeof(AVFilterBufferRefVideoProps))))
73 pic->w = picref->video->w = w;
74 pic->h = picref->video->h = h;
76 /* make sure the buffer gets read permission or it's useless for output */
77 picref->perms = perms | AV_PERM_READ;
80 picref->type = AVMEDIA_TYPE_VIDEO;
81 pic->format = picref->format = format;
83 memcpy(pic->data, data, 4*sizeof(data[0]));
84 memcpy(pic->linesize, linesize, 4*sizeof(linesize[0]));
85 memcpy(picref->data, pic->data, sizeof(picref->data));
86 memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize));
88 pic-> extended_data = pic->data;
89 picref->extended_data = picref->data;
91 picref->pts = AV_NOPTS_VALUE;
96 if (picref && picref->video)
97 av_free(picref->video);
104 AVFrame *ff_get_video_buffer(AVFilterLink *link, int w, int h)
108 av_unused char buf[16];
109 FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0);
111 if (link->dstpad->get_video_buffer)
112 ret = link->dstpad->get_video_buffer(link, w, h);
115 ret = ff_default_get_video_buffer(link, w, h);