1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
/*
* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <string.h>
#include "avcodec.h"
#include "libavutil/internal.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#if FF_API_OLD_BSF
FF_DISABLE_DEPRECATION_WARNINGS
AVBitStreamFilter *av_bitstream_filter_next(const AVBitStreamFilter *f)
{
const AVBitStreamFilter *filter = NULL;
void *opaque = NULL;
while (filter != f)
filter = av_bsf_next(&opaque);
return av_bsf_next(&opaque);
}
void av_register_bitstream_filter(AVBitStreamFilter *bsf)
{
}
typedef struct BSFCompatContext {
AVBSFContext *ctx;
int extradata_updated;
} BSFCompatContext;
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name)
{
AVBitStreamFilterContext *ctx = NULL;
BSFCompatContext *priv = NULL;
const AVBitStreamFilter *bsf;
bsf = av_bsf_get_by_name(name);
if (!bsf)
return NULL;
ctx = av_mallocz(sizeof(*ctx));
if (!ctx)
return NULL;
priv = av_mallocz(sizeof(*priv));
if (!priv)
goto fail;
ctx->filter = bsf;
ctx->priv_data = priv;
return ctx;
fail:
if (priv)
av_bsf_free(&priv->ctx);
av_freep(&priv);
av_freep(&ctx);
return NULL;
}
void av_bitstream_filter_close(AVBitStreamFilterContext *bsfc)
{
BSFCompatContext *priv;
if (!bsfc)
return;
priv = bsfc->priv_data;
av_bsf_free(&priv->ctx);
av_freep(&bsfc->priv_data);
av_free(bsfc);
}
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
AVCodecContext *avctx, const char *args,
uint8_t **poutbuf, int *poutbuf_size,
const uint8_t *buf, int buf_size, int keyframe)
{
BSFCompatContext *priv = bsfc->priv_data;
AVPacket pkt = { 0 };
int ret;
if (!priv->ctx) {
ret = av_bsf_alloc(bsfc->filter, &priv->ctx);
if (ret < 0)
return ret;
ret = avcodec_parameters_from_context(priv->ctx->par_in, avctx);
if (ret < 0)
return ret;
priv->ctx->time_base_in = avctx->time_base;
if (bsfc->args && bsfc->filter->priv_class) {
const AVOption *opt = av_opt_next(priv->ctx->priv_data, NULL);
const char * shorthand[2] = {NULL};
if (opt)
shorthand[0] = opt->name;
ret = av_opt_set_from_string(priv->ctx->priv_data, bsfc->args, shorthand, "=", ":");
}
ret = av_bsf_init(priv->ctx);
if (ret < 0)
return ret;
}
pkt.data = buf;
pkt.size = buf_size;
ret = av_bsf_send_packet(priv->ctx, &pkt);
if (ret < 0)
return ret;
*poutbuf = NULL;
*poutbuf_size = 0;
ret = av_bsf_receive_packet(priv->ctx, &pkt);
if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
return 0;
else if (ret < 0)
return ret;
*poutbuf = av_malloc(pkt.size + AV_INPUT_BUFFER_PADDING_SIZE);
if (!*poutbuf) {
av_packet_unref(&pkt);
return AVERROR(ENOMEM);
}
*poutbuf_size = pkt.size;
memcpy(*poutbuf, pkt.data, pkt.size);
av_packet_unref(&pkt);
/* drain all the remaining packets we cannot return */
while (ret >= 0) {
ret = av_bsf_receive_packet(priv->ctx, &pkt);
av_packet_unref(&pkt);
}
if (!priv->extradata_updated) {
/* update extradata in avctx from the output codec parameters */
if (priv->ctx->par_out->extradata_size && (!args || !strstr(args, "private_spspps_buf"))) {
av_freep(&avctx->extradata);
avctx->extradata_size = 0;
avctx->extradata = av_mallocz(priv->ctx->par_out->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
if (!avctx->extradata)
return AVERROR(ENOMEM);
memcpy(avctx->extradata, priv->ctx->par_out->extradata, priv->ctx->par_out->extradata_size);
avctx->extradata_size = priv->ctx->par_out->extradata_size;
}
priv->extradata_updated = 1;
}
return 1;
}
FF_ENABLE_DEPRECATION_WARNINGS
#endif
|
