h264_metadata: Add option to delete filler data
[libav.git] / libavfilter / video.c
1 /*
2 * This file is part of Libav.
3 *
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.
8 *
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.
13 *
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
17 */
18
19 #include <string.h>
20 #include <stdio.h>
21
22 #include "libavutil/buffer.h"
23 #include "libavutil/hwcontext.h"
24 #include "libavutil/imgutils.h"
25 #include "libavutil/mem.h"
26
27 #include "avfilter.h"
28 #include "internal.h"
29 #include "video.h"
30
31 AVFrame *ff_null_get_video_buffer(AVFilterLink *link, int w, int h)
32 {
33 return ff_get_video_buffer(link->dst->outputs[0], w, h);
34 }
35
36 /* TODO: set the buffer's priv member to a context structure for the whole
37 * filter chain. This will allow for a buffer pool instead of the constant
38 * alloc & free cycle currently implemented. */
39 AVFrame *ff_default_get_video_buffer(AVFilterLink *link, int w, int h)
40 {
41 AVFrame *frame = av_frame_alloc();
42 int ret;
43
44 if (!frame)
45 return NULL;
46
47 if (link->hw_frames_ctx &&
48 ((AVHWFramesContext*)link->hw_frames_ctx->data)->format == link->format) {
49 ret = av_hwframe_get_buffer(link->hw_frames_ctx, frame, 0);
50 } else {
51 frame->width = w;
52 frame->height = h;
53 frame->format = link->format;
54
55 ret = av_frame_get_buffer(frame, 32);
56 }
57 if (ret < 0)
58 av_frame_free(&frame);
59
60 return frame;
61 }
62
63 AVFrame *ff_get_video_buffer(AVFilterLink *link, int w, int h)
64 {
65 AVFrame *ret = NULL;
66
67 FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0);
68
69 if (link->dstpad->get_video_buffer)
70 ret = link->dstpad->get_video_buffer(link, w, h);
71
72 if (!ret)
73 ret = ff_default_get_video_buffer(link, w, h);
74
75 return ret;
76 }