2 * Copyright 2007 Bobby Bingham
3 * Copyright Stefano Sabatini <stefasab gmail com>
4 * Copyright Vitor Sessak <vitor1001 gmail com>
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 #include "libavutil/avassert.h"
27 #include "libavutil/buffer.h"
28 #include "libavutil/imgutils.h"
29 #include "libavutil/mem.h"
35 AVFrame *ff_null_get_video_buffer(AVFilterLink *link, int w, int h)
37 return ff_get_video_buffer(link->dst->outputs[0], w, h);
40 /* TODO: set the buffer's priv member to a context structure for the whole
41 * filter chain. This will allow for a buffer pool instead of the constant
42 * alloc & free cycle currently implemented. */
43 AVFrame *ff_default_get_video_buffer(AVFilterLink *link, int w, int h)
45 AVFrame *frame = av_frame_alloc();
49 AVFilterPool *pool = link->pool;
51 for (i = 0; i < POOL_SIZE; i++) {
52 picref = pool->pic[i];
53 if (picref && picref->buf->format == link->format && picref->buf->w == w && picref->buf->h == h) {
54 AVFilterBuffer *pic = picref->buf;
57 av_assert0(!picref->video->qp_table);
60 picref->perms = full_perms;
61 picref->format = link->format;
63 memcpy(picref->data, pic->data, sizeof(picref->data));
64 memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize));
70 pool = link->pool = av_mallocz(sizeof(AVFilterPool));
79 frame->format = link->format;
81 ret = av_frame_get_buffer(frame, 32);
83 av_frame_free(&frame);
86 memset(data[0], 128, i);
88 picref->buf->priv = pool;
89 picref->buf->free = NULL;
96 #if FF_API_AVFILTERBUFFER
98 avfilter_get_video_buffer_ref_from_arrays(uint8_t * const data[4], const int linesize[4], int perms,
99 int w, int h, enum AVPixelFormat format)
101 AVFilterBuffer *pic = av_mallocz(sizeof(AVFilterBuffer));
102 AVFilterBufferRef *picref = av_mallocz(sizeof(AVFilterBufferRef));
108 picref->buf->free = ff_avfilter_default_free_buffer;
109 if (!(picref->video = av_mallocz(sizeof(AVFilterBufferRefVideoProps))))
112 pic->w = picref->video->w = w;
113 pic->h = picref->video->h = h;
115 /* make sure the buffer gets read permission or it's useless for output */
116 picref->perms = perms | AV_PERM_READ;
119 picref->type = AVMEDIA_TYPE_VIDEO;
120 pic->format = picref->format = format;
122 memcpy(pic->data, data, 4*sizeof(data[0]));
123 memcpy(pic->linesize, linesize, 4*sizeof(linesize[0]));
124 memcpy(picref->data, pic->data, sizeof(picref->data));
125 memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize));
127 pic-> extended_data = pic->data;
128 picref->extended_data = picref->data;
130 picref->pts = AV_NOPTS_VALUE;
135 if (picref && picref->video)
136 av_free(picref->video);
143 AVFrame *ff_get_video_buffer(AVFilterLink *link, int w, int h)
147 av_unused char buf[16];
148 FF_TPRINTF_START(NULL, get_video_buffer); ff_tlog_link(NULL, link, 0);
150 if (link->dstpad->get_video_buffer)
151 ret = link->dstpad->get_video_buffer(link, w, h);
154 ret = ff_default_get_video_buffer(link, w, h);