h264_metadata: Add option to delete filler data
[libav.git] / libavfilter / video.c
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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
1d9c2dc8 19#include <string.h>
70766c21 20#include <stdio.h>
1d9c2dc8 21
7e350379 22#include "libavutil/buffer.h"
7433feb8 23#include "libavutil/hwcontext.h"
c5432d3c 24#include "libavutil/imgutils.h"
1d9c2dc8 25#include "libavutil/mem.h"
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26
27#include "avfilter.h"
28#include "internal.h"
43c7a01e 29#include "video.h"
c5432d3c 30
7e350379 31AVFrame *ff_null_get_video_buffer(AVFilterLink *link, int w, int h)
91791ac2 32{
7e350379 33 return ff_get_video_buffer(link->dst->outputs[0], w, h);
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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. */
7e350379 39AVFrame *ff_default_get_video_buffer(AVFilterLink *link, int w, int h)
c5432d3c 40{
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41 AVFrame *frame = av_frame_alloc();
42 int ret;
c5432d3c 43
7e350379 44 if (!frame)
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45 return NULL;
46
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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;
c5432d3c 54
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55 ret = av_frame_get_buffer(frame, 32);
56 }
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57 if (ret < 0)
58 av_frame_free(&frame);
59
60 return frame;
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61}
62
7e350379 63AVFrame *ff_get_video_buffer(AVFilterLink *link, int w, int h)
c5432d3c 64{
7e350379 65 AVFrame *ret = NULL;
c5432d3c 66
c5432d3c 67 FF_DPRINTF_START(NULL, get_video_buffer); ff_dlog_link(NULL, link, 0);
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68
69 if (link->dstpad->get_video_buffer)
7e350379 70 ret = link->dstpad->get_video_buffer(link, w, h);
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71
72 if (!ret)
7e350379 73 ret = ff_default_get_video_buffer(link, w, h);
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74
75 return ret;
76}