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
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
|
/*
* Copyright (c) 2001 Fabrice Bellard
* Copyright (c) 2002-2004 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
*/
/**
* @file
* Options definition for AVCodecContext.
*/
#include "config_components.h"
#include "avcodec.h"
#include "internal.h"
#include "libavutil/avassert.h"
#include "libavutil/internal.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include <string.h>
FF_DISABLE_DEPRECATION_WARNINGS
#include "options_table.h"
FF_ENABLE_DEPRECATION_WARNINGS
static const char* context_to_name(void* ptr) {
AVCodecContext *avc= ptr;
if (avc && avc->codec)
return avc->codec->name;
else
return "NULL";
}
static void *codec_child_next(void *obj, void *prev)
{
AVCodecContext *s = obj;
if (!prev && s->codec && s->codec->priv_class && s->priv_data)
return s->priv_data;
return NULL;
}
static const AVClass *codec_child_class_iterate(void **iter)
{
const AVCodec *c;
/* find next codec with priv options */
while (c = av_codec_iterate(iter))
if (c->priv_class)
return c->priv_class;
return NULL;
}
static AVClassCategory get_category(void *ptr)
{
AVCodecContext* avctx = ptr;
if(avctx->codec && avctx->codec->decode) return AV_CLASS_CATEGORY_DECODER;
else return AV_CLASS_CATEGORY_ENCODER;
}
static const AVClass av_codec_context_class = {
.class_name = "AVCodecContext",
.item_name = context_to_name,
.option = avcodec_options,
.version = LIBAVUTIL_VERSION_INT,
.log_level_offset_offset = offsetof(AVCodecContext, log_level_offset),
.child_next = codec_child_next,
.child_class_iterate = codec_child_class_iterate,
.category = AV_CLASS_CATEGORY_ENCODER,
.get_category = get_category,
};
static int init_context_defaults(AVCodecContext *s, const AVCodec *codec)
{
int flags=0;
memset(s, 0, sizeof(AVCodecContext));
s->av_class = &av_codec_context_class;
s->codec_type = codec ? codec->type : AVMEDIA_TYPE_UNKNOWN;
if (codec) {
s->codec = codec;
s->codec_id = codec->id;
}
if(s->codec_type == AVMEDIA_TYPE_AUDIO)
flags= AV_OPT_FLAG_AUDIO_PARAM;
else if(s->codec_type == AVMEDIA_TYPE_VIDEO)
flags= AV_OPT_FLAG_VIDEO_PARAM;
else if(s->codec_type == AVMEDIA_TYPE_SUBTITLE)
flags= AV_OPT_FLAG_SUBTITLE_PARAM;
av_opt_set_defaults2(s, flags, flags);
av_channel_layout_uninit(&s->ch_layout);
s->time_base = (AVRational){0,1};
s->framerate = (AVRational){ 0, 1 };
s->pkt_timebase = (AVRational){ 0, 1 };
s->get_buffer2 = avcodec_default_get_buffer2;
s->get_format = avcodec_default_get_format;
s->get_encode_buffer = avcodec_default_get_encode_buffer;
s->execute = avcodec_default_execute;
s->execute2 = avcodec_default_execute2;
s->sample_aspect_ratio = (AVRational){0,1};
s->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
s->pix_fmt = AV_PIX_FMT_NONE;
s->sw_pix_fmt = AV_PIX_FMT_NONE;
s->sample_fmt = AV_SAMPLE_FMT_NONE;
s->reordered_opaque = AV_NOPTS_VALUE;
if(codec && codec->priv_data_size){
s->priv_data = av_mallocz(codec->priv_data_size);
if (!s->priv_data)
return AVERROR(ENOMEM);
if(codec->priv_class){
*(const AVClass**)s->priv_data = codec->priv_class;
av_opt_set_defaults(s->priv_data);
}
}
if (codec && codec->defaults) {
int ret;
const AVCodecDefault *d = codec->defaults;
while (d->key) {
ret = av_opt_set(s, d->key, d->value, 0);
av_assert0(ret >= 0);
d++;
}
}
return 0;
}
AVCodecContext *avcodec_alloc_context3(const AVCodec *codec)
{
AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext));
if (!avctx)
return NULL;
if (init_context_defaults(avctx, codec) < 0) {
av_free(avctx);
return NULL;
}
return avctx;
}
void avcodec_free_context(AVCodecContext **pavctx)
{
AVCodecContext *avctx = *pavctx;
if (!avctx)
return;
avcodec_close(avctx);
av_freep(&avctx->extradata);
av_freep(&avctx->subtitle_header);
av_freep(&avctx->intra_matrix);
av_freep(&avctx->inter_matrix);
av_freep(&avctx->rc_override);
av_channel_layout_uninit(&avctx->ch_layout);
av_freep(pavctx);
}
const AVClass *avcodec_get_class(void)
{
return &av_codec_context_class;
}
#if FF_API_GET_FRAME_CLASS
FF_DISABLE_DEPRECATION_WARNINGS
#define FOFFSET(x) offsetof(AVFrame,x)
static const AVOption frame_options[]={
{"best_effort_timestamp", "", FOFFSET(best_effort_timestamp), AV_OPT_TYPE_INT64, {.i64 = AV_NOPTS_VALUE }, INT64_MIN, INT64_MAX, 0},
{"pkt_pos", "", FOFFSET(pkt_pos), AV_OPT_TYPE_INT64, {.i64 = -1 }, INT64_MIN, INT64_MAX, 0},
{"pkt_size", "", FOFFSET(pkt_size), AV_OPT_TYPE_INT64, {.i64 = -1 }, INT64_MIN, INT64_MAX, 0},
{"sample_aspect_ratio", "", FOFFSET(sample_aspect_ratio), AV_OPT_TYPE_RATIONAL, {.dbl = 0 }, 0, INT_MAX, 0},
{"width", "", FOFFSET(width), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
{"height", "", FOFFSET(height), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
{"format", "", FOFFSET(format), AV_OPT_TYPE_INT, {.i64 = -1 }, 0, INT_MAX, 0},
#if FF_API_OLD_CHANNEL_LAYOUT
{"channel_layout", "", FOFFSET(channel_layout), AV_OPT_TYPE_INT64, {.i64 = 0 }, 0, INT64_MAX, 0},
#endif
{"sample_rate", "", FOFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
{NULL},
};
static const AVClass av_frame_class = {
.class_name = "AVFrame",
.item_name = NULL,
.option = frame_options,
.version = LIBAVUTIL_VERSION_INT,
};
const AVClass *avcodec_get_frame_class(void)
{
return &av_frame_class;
}
FF_ENABLE_DEPRECATION_WARNINGS
#endif
#define SROFFSET(x) offsetof(AVSubtitleRect,x)
static const AVOption subtitle_rect_options[]={
{"x", "", SROFFSET(x), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
{"y", "", SROFFSET(y), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
{"w", "", SROFFSET(w), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
{"h", "", SROFFSET(h), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
{"type", "", SROFFSET(type), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
{"flags", "", SROFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, 1, 0, "flags"},
{"forced", "", SROFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, 1, 0},
{NULL},
};
static const AVClass av_subtitle_rect_class = {
.class_name = "AVSubtitleRect",
.item_name = NULL,
.option = subtitle_rect_options,
.version = LIBAVUTIL_VERSION_INT,
};
const AVClass *avcodec_get_subtitle_rect_class(void)
{
return &av_subtitle_rect_class;
}
|
