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1 | /* |
2 | * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> | |
3 | * | |
4 | * This file is part of FFmpeg. | |
5 | * | |
6 | * FFmpeg is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2.1 of the License, or (at your option) any later version. | |
10 | * | |
11 | * FFmpeg is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with FFmpeg; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include <string.h> | |
22 | ||
23 | #include "avcodec.h" | |
24 | #include "libavutil/atomic.h" | |
25 | #include "libavutil/mem.h" | |
26 | ||
27 | static AVBitStreamFilter *first_bitstream_filter = NULL; | |
28 | ||
29 | AVBitStreamFilter *av_bitstream_filter_next(const AVBitStreamFilter *f) | |
30 | { | |
31 | if (f) | |
32 | return f->next; | |
33 | else | |
34 | return first_bitstream_filter; | |
35 | } | |
36 | ||
37 | void av_register_bitstream_filter(AVBitStreamFilter *bsf) | |
38 | { | |
39 | do { | |
40 | bsf->next = first_bitstream_filter; | |
41 | } while(bsf->next != avpriv_atomic_ptr_cas((void * volatile *)&first_bitstream_filter, bsf->next, bsf)); | |
42 | } | |
43 | ||
44 | AVBitStreamFilterContext *av_bitstream_filter_init(const char *name) | |
45 | { | |
46 | AVBitStreamFilter *bsf = first_bitstream_filter; | |
47 | ||
48 | while (bsf) { | |
49 | if (!strcmp(name, bsf->name)) { | |
50 | AVBitStreamFilterContext *bsfc = | |
51 | av_mallocz(sizeof(AVBitStreamFilterContext)); | |
52 | bsfc->filter = bsf; | |
53 | bsfc->priv_data = | |
54 | bsf->priv_data_size ? av_mallocz(bsf->priv_data_size) : NULL; | |
55 | return bsfc; | |
56 | } | |
57 | bsf = bsf->next; | |
58 | } | |
59 | return NULL; | |
60 | } | |
61 | ||
62 | void av_bitstream_filter_close(AVBitStreamFilterContext *bsfc) | |
63 | { | |
64 | if (!bsfc) | |
65 | return; | |
66 | if (bsfc->filter->close) | |
67 | bsfc->filter->close(bsfc); | |
68 | av_freep(&bsfc->priv_data); | |
69 | av_parser_close(bsfc->parser); | |
70 | av_free(bsfc); | |
71 | } | |
72 | ||
73 | int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc, | |
74 | AVCodecContext *avctx, const char *args, | |
75 | uint8_t **poutbuf, int *poutbuf_size, | |
76 | const uint8_t *buf, int buf_size, int keyframe) | |
77 | { | |
78 | *poutbuf = (uint8_t *)buf; | |
79 | *poutbuf_size = buf_size; | |
80 | return bsfc->filter->filter(bsfc, avctx, args, poutbuf, poutbuf_size, | |
81 | buf, buf_size, keyframe); | |
82 | } |