FFmpeg
bitstream_filters.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg 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  * FFmpeg 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 FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #include "config.h"
20 
21 #include "libavutil/common.h"
22 #include "libavutil/log.h"
23 
24 #include "avcodec.h"
25 #include "bsf_internal.h"
26 
31 extern const AVBitStreamFilter ff_chomp_bsf;
50 extern const AVBitStreamFilter ff_noise_bsf;
51 extern const AVBitStreamFilter ff_null_bsf;
56 extern const AVBitStreamFilter ff_setts_bsf;
64 
65 #include "libavcodec/bsf_list.c"
66 
67 const AVBitStreamFilter *av_bsf_iterate(void **opaque)
68 {
69  uintptr_t i = (uintptr_t)*opaque;
70  const AVBitStreamFilter *f = bitstream_filters[i];
71 
72  if (f)
73  *opaque = (void*)(i + 1);
74 
75  return f;
76 }
77 
78 #if FF_API_NEXT
79 const AVBitStreamFilter *av_bsf_next(void **opaque) {
80  return av_bsf_iterate(opaque);
81 }
82 #endif
83 
85 {
86  const AVBitStreamFilter *f = NULL;
87  void *i = 0;
88 
89  if (!name)
90  return NULL;
91 
92  while ((f = av_bsf_iterate(&i))) {
93  if (!strcmp(f->name, name))
94  return f;
95  }
96 
97  return NULL;
98 }
99 
100 #if FF_API_CHILD_CLASS_NEXT
101 const AVClass *ff_bsf_child_class_next(const AVClass *prev)
102 {
103  const AVBitStreamFilter *f = NULL;
104  void *i = 0;
105 
106  /* find the filter that corresponds to prev */
107  while (prev && (f = av_bsf_iterate(&i))) {
108  if (f->priv_class == prev) {
109  break;
110  }
111  }
112 
113  /* find next filter with priv options */
114  while ((f = av_bsf_iterate(&i))) {
115  if (f->priv_class)
116  return f->priv_class;
117  }
118  return NULL;
119 }
120 #endif
121 
122 const AVClass *ff_bsf_child_class_iterate(void **opaque)
123 {
124  const AVBitStreamFilter *f;
125 
126  /* find next filter with priv options */
127  while ((f = av_bsf_iterate(opaque))) {
128  if (f->priv_class)
129  return f->priv_class;
130  }
131  return NULL;
132 }
ff_setts_bsf
const AVBitStreamFilter ff_setts_bsf
Definition: setts_bsf.c:214
name
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default minimum maximum flags name is the option name
Definition: writing_filters.txt:88
ff_mpeg2_metadata_bsf
const AVBitStreamFilter ff_mpeg2_metadata_bsf
Definition: mpeg2_metadata_bsf.c:235
bsf_internal.h
ff_mjpega_dump_header_bsf
const AVBitStreamFilter ff_mjpega_dump_header_bsf
Definition: mjpega_dump_header_bsf.c:104
ff_h264_redundant_pps_bsf
const AVBitStreamFilter ff_h264_redundant_pps_bsf
Definition: h264_redundant_pps_bsf.c:141
ff_dca_core_bsf
const AVBitStreamFilter ff_dca_core_bsf
Definition: dca_core_bsf.c:57
ff_aac_adtstoasc_bsf
const AVBitStreamFilter ff_aac_adtstoasc_bsf
Definition: aac_adtstoasc_bsf.c:152
av_bsf_iterate
const AVBitStreamFilter * av_bsf_iterate(void **opaque)
Iterate over all registered bitstream filters.
Definition: bitstream_filters.c:67
ff_vp9_superframe_bsf
const AVBitStreamFilter ff_vp9_superframe_bsf
Definition: vp9_superframe_bsf.c:214
ff_av1_frame_split_bsf
const AVBitStreamFilter ff_av1_frame_split_bsf
Definition: av1_frame_split_bsf.c:253
av_bsf_get_by_name
const AVBitStreamFilter * av_bsf_get_by_name(const char *name)
Definition: bitstream_filters.c:84
ff_mp3_header_decompress_bsf
const AVBitStreamFilter ff_mp3_header_decompress_bsf
Definition: mp3_header_decompress_bsf.c:125
ff_eac3_core_bsf
const AVBitStreamFilter ff_eac3_core_bsf
Definition: eac3_core_bsf.c:82
ff_h264_mp4toannexb_bsf
const AVBitStreamFilter ff_h264_mp4toannexb_bsf
Definition: h264_mp4toannexb_bsf.c:315
ff_vp9_metadata_bsf
const AVBitStreamFilter ff_vp9_metadata_bsf
Definition: vp9_metadata_bsf.c:138
ff_pcm_rechunk_bsf
const AVBitStreamFilter ff_pcm_rechunk_bsf
Definition: pcm_rechunk_bsf.c:211
ff_av1_frame_merge_bsf
const AVBitStreamFilter ff_av1_frame_merge_bsf
Definition: av1_frame_merge_bsf.c:154
f
#define f(width, name)
Definition: cbs_vp9.c:255
ff_filter_units_bsf
const AVBitStreamFilter ff_filter_units_bsf
Definition: filter_units_bsf.c:238
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
NULL
#define NULL
Definition: coverity.c:32
ff_hapqa_extract_bsf
const AVBitStreamFilter ff_hapqa_extract_bsf
Definition: hapqa_extract_bsf.c:128
ff_h264_metadata_bsf
const AVBitStreamFilter ff_h264_metadata_bsf
Definition: h264_metadata_bsf.c:702
ff_vp9_superframe_split_bsf
const AVBitStreamFilter ff_vp9_superframe_split_bsf
Definition: vp9_superframe_split_bsf.c:158
ff_vp9_raw_reorder_bsf
const AVBitStreamFilter ff_vp9_raw_reorder_bsf
Definition: vp9_raw_reorder_bsf.c:411
ff_bsf_child_class_iterate
const AVClass * ff_bsf_child_class_iterate(void **opaque)
Definition: bitstream_filters.c:122
ff_null_bsf
const AVBitStreamFilter ff_null_bsf
Definition: null_bsf.c:27
ff_truehd_core_bsf
const AVBitStreamFilter ff_truehd_core_bsf
Definition: truehd_core_bsf.c:176
av_bsf_next
const AVBitStreamFilter * av_bsf_next(void **opaque)
Definition: bitstream_filters.c:79
ff_prores_metadata_bsf
const AVBitStreamFilter ff_prores_metadata_bsf
Definition: prores_metadata_bsf.c:169
ff_mov2textsub_bsf
const AVBitStreamFilter ff_mov2textsub_bsf
Definition: movsub_bsf.c:84
ff_hevc_mp4toannexb_bsf
const AVBitStreamFilter ff_hevc_mp4toannexb_bsf
Definition: hevc_mp4toannexb_bsf.c:198
i
int i
Definition: input.c:407
log.h
ff_remove_extradata_bsf
const AVBitStreamFilter ff_remove_extradata_bsf
Definition: remove_extradata_bsf.c:111
common.h
ff_hevc_metadata_bsf
const AVBitStreamFilter ff_hevc_metadata_bsf
Definition: h265_metadata_bsf.c:501
ff_text2movsub_bsf
const AVBitStreamFilter ff_text2movsub_bsf
Definition: movsub_bsf.c:60
avcodec.h
ff_mjpeg2jpeg_bsf
const AVBitStreamFilter ff_mjpeg2jpeg_bsf
Definition: mjpeg2jpeg_bsf.c:138
ff_trace_headers_bsf
const AVBitStreamFilter ff_trace_headers_bsf
Definition: trace_headers_bsf.c:107
AVBitStreamFilter
Definition: bsf.h:98
ff_dump_extradata_bsf
const AVBitStreamFilter ff_dump_extradata_bsf
Definition: dump_extradata_bsf.c:101
ff_chomp_bsf
const AVBitStreamFilter ff_chomp_bsf
This filter removes a string of NULL bytes from the end of a packet.
Definition: chomp_bsf.c:42
ff_opus_metadata_bsf
const AVBitStreamFilter ff_opus_metadata_bsf
Definition: opus_metadata_bsf.c:60
ff_imx_dump_header_bsf
const AVBitStreamFilter ff_imx_dump_header_bsf
Definition: imx_dump_header_bsf.c:72
ff_mpeg4_unpack_bframes_bsf
const AVBitStreamFilter ff_mpeg4_unpack_bframes_bsf
Definition: mpeg4_unpack_bframes_bsf.c:158
ff_extract_extradata_bsf
const AVBitStreamFilter ff_extract_extradata_bsf
Definition: extract_extradata_bsf.c:424
ff_noise_bsf
const AVBitStreamFilter ff_noise_bsf
Definition: noise_bsf.c:85
ff_av1_metadata_bsf
const AVBitStreamFilter ff_av1_metadata_bsf
Definition: av1_metadata_bsf.c:220