lavc: Consistently prefix input buffer defines
[libav.git] / libavcodec / options.c
1 /*
2 * Copyright (c) 2001 Fabrice Bellard
3 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
4 *
5 * This file is part of Libav.
6 *
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file
24 * Options definition for AVCodecContext.
25 */
26
27 #include "avcodec.h"
28 #include "internal.h"
29 #include "libavutil/avassert.h"
30 #include "libavutil/internal.h"
31 #include "libavutil/mem.h"
32 #include "libavutil/opt.h"
33 #include <float.h> /* FLT_MIN, FLT_MAX */
34 #include <string.h>
35
36 FF_DISABLE_DEPRECATION_WARNINGS
37 #include "options_table.h"
38 FF_ENABLE_DEPRECATION_WARNINGS
39
40 static const char* context_to_name(void* ptr) {
41 AVCodecContext *avc= ptr;
42
43 if(avc && avc->codec && avc->codec->name)
44 return avc->codec->name;
45 else
46 return "NULL";
47 }
48
49 static void *codec_child_next(void *obj, void *prev)
50 {
51 AVCodecContext *s = obj;
52 if (!prev && s->codec && s->codec->priv_class && s->priv_data)
53 return s->priv_data;
54 return NULL;
55 }
56
57 static const AVClass *codec_child_class_next(const AVClass *prev)
58 {
59 AVCodec *c = NULL;
60
61 /* find the codec that corresponds to prev */
62 while (prev && (c = av_codec_next(c)))
63 if (c->priv_class == prev)
64 break;
65
66 /* find next codec with priv options */
67 while (c = av_codec_next(c))
68 if (c->priv_class)
69 return c->priv_class;
70 return NULL;
71 }
72
73 static const AVClass av_codec_context_class = {
74 .class_name = "AVCodecContext",
75 .item_name = context_to_name,
76 .option = avcodec_options,
77 .version = LIBAVUTIL_VERSION_INT,
78 .log_level_offset_offset = offsetof(AVCodecContext, log_level_offset),
79 .child_next = codec_child_next,
80 .child_class_next = codec_child_class_next,
81 };
82
83 int avcodec_get_context_defaults3(AVCodecContext *s, const AVCodec *codec)
84 {
85 memset(s, 0, sizeof(AVCodecContext));
86
87 s->av_class = &av_codec_context_class;
88
89 s->codec_type = codec ? codec->type : AVMEDIA_TYPE_UNKNOWN;
90 s->codec = codec;
91 av_opt_set_defaults(s);
92
93 s->time_base = (AVRational){0,1};
94 s->framerate = (AVRational){ 0, 1 };
95 s->get_buffer2 = avcodec_default_get_buffer2;
96 s->get_format = avcodec_default_get_format;
97 s->execute = avcodec_default_execute;
98 s->execute2 = avcodec_default_execute2;
99 s->sample_aspect_ratio = (AVRational){0,1};
100 s->pix_fmt = AV_PIX_FMT_NONE;
101 s->sample_fmt = AV_SAMPLE_FMT_NONE;
102
103 s->reordered_opaque = AV_NOPTS_VALUE;
104 if(codec && codec->priv_data_size){
105 if(!s->priv_data){
106 s->priv_data= av_mallocz(codec->priv_data_size);
107 if (!s->priv_data) {
108 return AVERROR(ENOMEM);
109 }
110 }
111 if(codec->priv_class){
112 *(const AVClass**)s->priv_data = codec->priv_class;
113 av_opt_set_defaults(s->priv_data);
114 }
115 }
116 if (codec && codec->defaults) {
117 int ret;
118 const AVCodecDefault *d = codec->defaults;
119 while (d->key) {
120 ret = av_opt_set(s, d->key, d->value, 0);
121 av_assert0(ret >= 0);
122 d++;
123 }
124 }
125 return 0;
126 }
127
128 AVCodecContext *avcodec_alloc_context3(const AVCodec *codec)
129 {
130 AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext));
131
132 if (!avctx)
133 return NULL;
134
135 if(avcodec_get_context_defaults3(avctx, codec) < 0){
136 av_free(avctx);
137 return NULL;
138 }
139
140 return avctx;
141 }
142
143 void avcodec_free_context(AVCodecContext **pavctx)
144 {
145 AVCodecContext *avctx = *pavctx;
146
147 if (!avctx)
148 return;
149
150 avcodec_close(avctx);
151
152 av_freep(&avctx->extradata);
153 av_freep(&avctx->subtitle_header);
154
155 av_freep(pavctx);
156 }
157
158 int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src)
159 {
160 const AVCodec *orig_codec = dest->codec;
161 uint8_t *orig_priv_data = dest->priv_data;
162
163 if (avcodec_is_open(dest)) { // check that the dest context is uninitialized
164 av_log(dest, AV_LOG_ERROR,
165 "Tried to copy AVCodecContext %p into already-initialized %p\n",
166 src, dest);
167 return AVERROR(EINVAL);
168 }
169 memcpy(dest, src, sizeof(*dest));
170
171 dest->priv_data = orig_priv_data;
172 dest->codec = orig_codec;
173
174 /* set values specific to opened codecs back to their default state */
175 dest->slice_offset = NULL;
176 dest->hwaccel = NULL;
177 dest->internal = NULL;
178
179 /* reallocate values that should be allocated separately */
180 dest->extradata = NULL;
181 dest->intra_matrix = NULL;
182 dest->inter_matrix = NULL;
183 dest->rc_override = NULL;
184 dest->subtitle_header = NULL;
185 #if FF_API_MPV_OPT
186 FF_DISABLE_DEPRECATION_WARNINGS
187 dest->rc_eq = NULL;
188 if (src->rc_eq) {
189 dest->rc_eq = av_strdup(src->rc_eq);
190 if (!dest->rc_eq)
191 return AVERROR(ENOMEM);
192 }
193 FF_ENABLE_DEPRECATION_WARNINGS
194 #endif
195
196 #define alloc_and_copy_or_fail(obj, size, pad) \
197 if (src->obj && size > 0) { \
198 dest->obj = av_malloc(size + pad); \
199 if (!dest->obj) \
200 goto fail; \
201 memcpy(dest->obj, src->obj, size); \
202 if (pad) \
203 memset(((uint8_t *) dest->obj) + size, 0, pad); \
204 }
205 alloc_and_copy_or_fail(extradata, src->extradata_size,
206 AV_INPUT_BUFFER_PADDING_SIZE);
207 alloc_and_copy_or_fail(intra_matrix, 64 * sizeof(int16_t), 0);
208 alloc_and_copy_or_fail(inter_matrix, 64 * sizeof(int16_t), 0);
209 alloc_and_copy_or_fail(rc_override, src->rc_override_count * sizeof(*src->rc_override), 0);
210 alloc_and_copy_or_fail(subtitle_header, src->subtitle_header_size, 0);
211 dest->subtitle_header_size = src->subtitle_header_size;
212 #undef alloc_and_copy_or_fail
213
214 return 0;
215
216 fail:
217 av_freep(&dest->rc_override);
218 av_freep(&dest->intra_matrix);
219 av_freep(&dest->inter_matrix);
220 av_freep(&dest->extradata);
221 #if FF_API_MPV_OPT
222 FF_DISABLE_DEPRECATION_WARNINGS
223 av_freep(&dest->rc_eq);
224 FF_ENABLE_DEPRECATION_WARNINGS
225 #endif
226 return AVERROR(ENOMEM);
227 }
228
229 const AVClass *avcodec_get_class(void)
230 {
231 return &av_codec_context_class;
232 }