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1 | /* |
2 | * Copyright 2007 Bobby Bingham | |
3 | * Copyright Stefano Sabatini <stefasab gmail com> | |
4 | * Copyright Vitor Sessak <vitor1001 gmail com> | |
5 | * | |
6 | * This file is part of FFmpeg. | |
7 | * | |
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. | |
12 | * | |
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. | |
17 | * | |
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 | |
21 | */ | |
22 | ||
23 | #include <string.h> | |
24 | #include <stdio.h> | |
25 | ||
26 | #include "libavutil/avassert.h" | |
27 | #include "libavutil/buffer.h" | |
28 | #include "libavutil/imgutils.h" | |
29 | #include "libavutil/mem.h" | |
30 | ||
31 | #include "avfilter.h" | |
32 | #include "internal.h" | |
33 | #include "video.h" | |
34 | ||
35 | AVFrame *ff_null_get_video_buffer(AVFilterLink *link, int w, int h) | |
36 | { | |
37 | return ff_get_video_buffer(link->dst->outputs[0], w, h); | |
38 | } | |
39 | ||
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) | |
44 | { | |
45 | AVFrame *frame = av_frame_alloc(); | |
46 | int ret; | |
47 | ||
48 | if (!frame) | |
49 | return NULL; | |
50 | ||
51 | frame->width = w; | |
52 | frame->height = h; | |
53 | frame->format = link->format; | |
54 | ||
55 | ret = av_frame_get_buffer(frame, 32); | |
56 | if (ret < 0) | |
57 | av_frame_free(&frame); | |
58 | ||
59 | return frame; | |
60 | } | |
61 | ||
62 | #if FF_API_AVFILTERBUFFER | |
63 | AVFilterBufferRef * | |
64 | avfilter_get_video_buffer_ref_from_arrays(uint8_t * const data[4], const int linesize[4], int perms, | |
65 | int w, int h, enum AVPixelFormat format) | |
66 | { | |
67 | AVFilterBuffer *pic = av_mallocz(sizeof(AVFilterBuffer)); | |
68 | AVFilterBufferRef *picref = av_mallocz(sizeof(AVFilterBufferRef)); | |
69 | ||
70 | if (!pic || !picref) | |
71 | goto fail; | |
72 | ||
73 | picref->buf = pic; | |
74 | picref->buf->free = ff_avfilter_default_free_buffer; | |
75 | if (!(picref->video = av_mallocz(sizeof(AVFilterBufferRefVideoProps)))) | |
76 | goto fail; | |
77 | ||
78 | pic->w = picref->video->w = w; | |
79 | pic->h = picref->video->h = h; | |
80 | ||
81 | /* make sure the buffer gets read permission or it's useless for output */ | |
82 | picref->perms = perms | AV_PERM_READ; | |
83 | ||
84 | pic->refcount = 1; | |
85 | picref->type = AVMEDIA_TYPE_VIDEO; | |
86 | pic->format = picref->format = format; | |
87 | ||
88 | memcpy(pic->data, data, 4*sizeof(data[0])); | |
89 | memcpy(pic->linesize, linesize, 4*sizeof(linesize[0])); | |
90 | memcpy(picref->data, pic->data, sizeof(picref->data)); | |
91 | memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize)); | |
92 | ||
93 | pic-> extended_data = pic->data; | |
94 | picref->extended_data = picref->data; | |
95 | ||
96 | picref->pts = AV_NOPTS_VALUE; | |
97 | ||
98 | return picref; | |
99 | ||
100 | fail: | |
101 | if (picref && picref->video) | |
102 | av_free(picref->video); | |
103 | av_free(picref); | |
104 | av_free(pic); | |
105 | return NULL; | |
106 | } | |
107 | #endif | |
108 | ||
109 | AVFrame *ff_get_video_buffer(AVFilterLink *link, int w, int h) | |
110 | { | |
111 | AVFrame *ret = NULL; | |
112 | ||
113 | FF_TPRINTF_START(NULL, get_video_buffer); ff_tlog_link(NULL, link, 0); | |
114 | ||
115 | if (link->dstpad->get_video_buffer) | |
116 | ret = link->dstpad->get_video_buffer(link, w, h); | |
117 | ||
118 | if (!ret) | |
119 | ret = ff_default_get_video_buffer(link, w, h); | |
120 | ||
121 | return ret; | |
122 | } |