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remove_extradata_bsf.c
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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 "libavutil/log.h"
22 #include "libavutil/opt.h"
23 
24 #include "avcodec.h"
25 #include "bsf.h"
26 
27 enum RemoveFreq {
31 };
32 
33 typedef struct RemoveExtradataContext {
34  const AVClass *class;
35  int freq;
36 
40 
42 {
44 
45  int ret;
46 
47  ret = ff_bsf_get_packet_ref(ctx, pkt);
48  if (ret < 0)
49  return ret;
50 
51  if (s->parser && s->parser->parser->split) {
52  if (s->freq == REMOVE_FREQ_ALL ||
53  (s->freq == REMOVE_FREQ_NONKEYFRAME && !(pkt->flags & AV_PKT_FLAG_KEY)) ||
54  (s->freq == REMOVE_FREQ_KEYFRAME && pkt->flags & AV_PKT_FLAG_KEY)) {
55  int i = s->parser->parser->split(s->avctx, pkt->data, pkt->size);
56  pkt->data += i;
57  pkt->size -= i;
58  }
59  }
60 
61  return 0;
62 }
63 
65 {
67  int ret;
68 
70 
71  if (s->parser) {
73  if (!s->avctx)
74  return AVERROR(ENOMEM);
75 
77  if (ret < 0)
78  return ret;
79  }
80 
81  return 0;
82 }
83 
85 {
87 
90 }
91 
92 #define OFFSET(x) offsetof(RemoveExtradataContext, x)
93 #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM)
94 static const AVOption options[] = {
96  { "k", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = REMOVE_FREQ_NONKEYFRAME }, .flags = FLAGS, .unit = "freq" },
97  { "keyframe", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = REMOVE_FREQ_KEYFRAME }, .flags = FLAGS, .unit = "freq" },
98  { "e", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = REMOVE_FREQ_ALL }, .flags = FLAGS, .unit = "freq" },
99  { "all", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = REMOVE_FREQ_ALL }, .flags = FLAGS, .unit = "freq" },
100  { NULL },
101 };
102 
104  .class_name = "remove_extradata",
105  .item_name = av_default_item_name,
106  .option = options,
107  .version = LIBAVUTIL_VERSION_INT,
108 };
109 
111  .name = "remove_extra",
112  .priv_data_size = sizeof(RemoveExtradataContext),
113  .priv_class = &remove_extradata_class,
115  .close = remove_extradata_close,
117 };
#define NULL
Definition: coverity.c:32
static const AVClass remove_extradata_class
AVOption.
Definition: opt.h:246
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3886
The bitstream filter state.
Definition: avcodec.h:5689
int size
Definition: avcodec.h:1433
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
static AVPacket pkt
void * priv_data
Opaque filter-specific private data.
Definition: avcodec.h:5710
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
static void filter(int16_t *output, ptrdiff_t out_stride, int16_t *low, ptrdiff_t low_stride, int16_t *high, ptrdiff_t high_stride, int len, int clip)
Definition: cfhd.c:153
AVOptions.
int avcodec_parameters_to_context(AVCodecContext *codec, const AVCodecParameters *par)
Fill the codec context based on the values from the supplied codec parameters.
Definition: utils.c:2080
const char * name
Definition: avcodec.h:5739
uint8_t * data
Definition: avcodec.h:1432
static void remove_extradata_close(AVBSFContext *ctx)
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1464
struct AVCodecParser * parser
Definition: avcodec.h:5036
#define AVERROR(e)
Definition: error.h:43
#define FLAGS
#define OFFSET(x)
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1438
AVCodecContext * avcodec_alloc_context3(const AVCodec *codec)
Allocate an AVCodecContext and set its fields to default values.
Definition: options.c:156
AVFormatContext * ctx
Definition: movenc.c:48
void av_parser_close(AVCodecParserContext *s)
Definition: parser.c:309
#define s(width, name)
Definition: cbs_vp9.c:257
static int remove_extradata_init(AVBSFContext *ctx)
AVCodecParserContext * av_parser_init(int codec_id)
Definition: parser.c:119
Libavcodec external API header.
void avcodec_free_context(AVCodecContext **avctx)
Free the codec context and everything associated with it and write NULL to the provided pointer...
Definition: options.c:171
main external API structure.
Definition: avcodec.h:1520
Describe the class of an AVClass context structure.
Definition: log.h:67
AVCodecParserContext * parser
static int remove_extradata(AVBSFContext *ctx, AVPacket *pkt)
int(* split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size)
Definition: avcodec.h:5212
const AVBitStreamFilter ff_remove_extradata_bsf
static const AVOption options[]
This structure stores compressed data.
Definition: avcodec.h:1409
AVCodecParameters * par_in
Parameters of the input stream.
Definition: avcodec.h:5717
int ff_bsf_get_packet_ref(AVBSFContext *ctx, AVPacket *pkt)
Called by bitstream filters to get packet for filtering.
Definition: bsf.c:228