GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/options.c Lines: 128 157 81.5 %
Date: 2021-01-21 21:11:50 Branches: 67 112 59.8 %

Line Branch Exec Source
1
/*
2
 * Copyright (c) 2001 Fabrice Bellard
3
 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
4
 *
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 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg 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
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 * version 2.1 of the License, or (at your option) any later version.
11
 *
12
 * FFmpeg 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
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 * Lesser General Public License for more details.
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 *
17
 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * 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 <string.h>
34
35
FF_DISABLE_DEPRECATION_WARNINGS
36
#include "options_table.h"
37
FF_ENABLE_DEPRECATION_WARNINGS
38
39
4251
static const char* context_to_name(void* ptr) {
40
4251
    AVCodecContext *avc= ptr;
41
42

4251
    if(avc && avc->codec && avc->codec->name)
43
3832
        return avc->codec->name;
44
    else
45
419
        return "NULL";
46
}
47
48
41
static void *codec_child_next(void *obj, void *prev)
49
{
50
41
    AVCodecContext *s = obj;
51


41
    if (!prev && s->codec && s->codec->priv_class && s->priv_data)
52
21
        return s->priv_data;
53
20
    return NULL;
54
}
55
56
#if FF_API_CHILD_CLASS_NEXT
57
static const AVClass *codec_child_class_next(const AVClass *prev)
58
{
59
    void *iter = NULL;
60
    const AVCodec *c = NULL;
61
62
    /* find the codec that corresponds to prev */
63
    while (prev && (c = av_codec_iterate(&iter)))
64
        if (c->priv_class == prev)
65
            break;
66
67
    /* find next codec with priv options */
68
    while (c = av_codec_iterate(&iter))
69
        if (c->priv_class)
70
            return c->priv_class;
71
    return NULL;
72
}
73
#endif
74
75
10070758
static const AVClass *codec_child_class_iterate(void **iter)
76
{
77
    const AVCodec *c;
78
    /* find next codec with priv options */
79
50491303
    while (c = av_codec_iterate(iter))
80
50413294
        if (c->priv_class)
81
9992749
            return c->priv_class;
82
78009
    return NULL;
83
}
84
85
4251
static AVClassCategory get_category(void *ptr)
86
{
87
4251
    AVCodecContext* avctx = ptr;
88

4251
    if(avctx->codec && avctx->codec->decode) return AV_CLASS_CATEGORY_DECODER;
89
533
    else                                     return AV_CLASS_CATEGORY_ENCODER;
90
}
91
92
static const AVClass av_codec_context_class = {
93
    .class_name              = "AVCodecContext",
94
    .item_name               = context_to_name,
95
    .option                  = avcodec_options,
96
    .version                 = LIBAVUTIL_VERSION_INT,
97
    .log_level_offset_offset = offsetof(AVCodecContext, log_level_offset),
98
    .child_next              = codec_child_next,
99
#if FF_API_CHILD_CLASS_NEXT
100
    .child_class_next        = codec_child_class_next,
101
#endif
102
    .child_class_iterate     = codec_child_class_iterate,
103
    .category                = AV_CLASS_CATEGORY_ENCODER,
104
    .get_category            = get_category,
105
};
106
107
51397
static int init_context_defaults(AVCodecContext *s, const AVCodec *codec)
108
{
109
51397
    int flags=0;
110
51397
    memset(s, 0, sizeof(AVCodecContext));
111
112
51397
    s->av_class = &av_codec_context_class;
113
114
51397
    s->codec_type = codec ? codec->type : AVMEDIA_TYPE_UNKNOWN;
115
51397
    if (codec) {
116
12466
        s->codec = codec;
117
12466
        s->codec_id = codec->id;
118
    }
119
120
51397
    if(s->codec_type == AVMEDIA_TYPE_AUDIO)
121
2589
        flags= AV_OPT_FLAG_AUDIO_PARAM;
122
48808
    else if(s->codec_type == AVMEDIA_TYPE_VIDEO)
123
9800
        flags= AV_OPT_FLAG_VIDEO_PARAM;
124
39008
    else if(s->codec_type == AVMEDIA_TYPE_SUBTITLE)
125
77
        flags= AV_OPT_FLAG_SUBTITLE_PARAM;
126
51397
    av_opt_set_defaults2(s, flags, flags);
127
128
51397
    s->time_base           = (AVRational){0,1};
129
51397
    s->framerate           = (AVRational){ 0, 1 };
130
51397
    s->pkt_timebase        = (AVRational){ 0, 1 };
131
51397
    s->get_buffer2         = avcodec_default_get_buffer2;
132
51397
    s->get_format          = avcodec_default_get_format;
133
51397
    s->execute             = avcodec_default_execute;
134
51397
    s->execute2            = avcodec_default_execute2;
135
51397
    s->sample_aspect_ratio = (AVRational){0,1};
136
51397
    s->pix_fmt             = AV_PIX_FMT_NONE;
137
51397
    s->sw_pix_fmt          = AV_PIX_FMT_NONE;
138
51397
    s->sample_fmt          = AV_SAMPLE_FMT_NONE;
139
140
51397
    s->reordered_opaque    = AV_NOPTS_VALUE;
141

51397
    if(codec && codec->priv_data_size){
142
7155
        if(!s->priv_data){
143
7155
            s->priv_data= av_mallocz(codec->priv_data_size);
144
7155
            if (!s->priv_data) {
145
                return AVERROR(ENOMEM);
146
            }
147
        }
148
7155
        if(codec->priv_class){
149
2370
            *(const AVClass**)s->priv_data = codec->priv_class;
150
2370
            av_opt_set_defaults(s->priv_data);
151
        }
152
    }
153

51397
    if (codec && codec->defaults) {
154
        int ret;
155
188
        const AVCodecDefault *d = codec->defaults;
156
376
        while (d->key) {
157
188
            ret = av_opt_set(s, d->key, d->value, 0);
158
188
            av_assert0(ret >= 0);
159
188
            d++;
160
        }
161
    }
162
51397
    return 0;
163
}
164
165
#if FF_API_GET_CONTEXT_DEFAULTS
166
int avcodec_get_context_defaults3(AVCodecContext *s, const AVCodec *codec)
167
{
168
    return init_context_defaults(s, codec);
169
}
170
#endif
171
172
51397
AVCodecContext *avcodec_alloc_context3(const AVCodec *codec)
173
{
174
51397
    AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext));
175
176
51397
    if (!avctx)
177
        return NULL;
178
179
51397
    if (init_context_defaults(avctx, codec) < 0) {
180
        av_free(avctx);
181
        return NULL;
182
    }
183
184
51397
    return avctx;
185
}
186
187
51270
void avcodec_free_context(AVCodecContext **pavctx)
188
{
189
51270
    AVCodecContext *avctx = *pavctx;
190
191
51270
    if (!avctx)
192
5
        return;
193
194
51265
    avcodec_close(avctx);
195
196
51265
    av_freep(&avctx->extradata);
197
51265
    av_freep(&avctx->subtitle_header);
198
51265
    av_freep(&avctx->intra_matrix);
199
51265
    av_freep(&avctx->inter_matrix);
200
51265
    av_freep(&avctx->rc_override);
201
202
51265
    av_freep(pavctx);
203
}
204
205
#if FF_API_COPY_CONTEXT
206
45
static void copy_context_reset(AVCodecContext *avctx)
207
{
208
    int i;
209
210
45
    av_opt_free(avctx);
211
#if FF_API_CODED_FRAME
212
FF_DISABLE_DEPRECATION_WARNINGS
213
45
    av_frame_free(&avctx->coded_frame);
214
FF_ENABLE_DEPRECATION_WARNINGS
215
#endif
216
45
    av_freep(&avctx->rc_override);
217
45
    av_freep(&avctx->intra_matrix);
218
45
    av_freep(&avctx->inter_matrix);
219
45
    av_freep(&avctx->extradata);
220
45
    av_freep(&avctx->subtitle_header);
221
45
    av_buffer_unref(&avctx->hw_frames_ctx);
222
45
    av_buffer_unref(&avctx->hw_device_ctx);
223
45
    for (i = 0; i < avctx->nb_coded_side_data; i++)
224
        av_freep(&avctx->coded_side_data[i].data);
225
45
    av_freep(&avctx->coded_side_data);
226
45
    avctx->subtitle_header_size = 0;
227
45
    avctx->nb_coded_side_data = 0;
228
45
    avctx->extradata_size = 0;
229
45
}
230
231
45
int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src)
232
{
233
45
    const AVCodec *orig_codec = dest->codec;
234
45
    uint8_t *orig_priv_data = dest->priv_data;
235
236
45
    if (avcodec_is_open(dest)) { // check that the dest context is uninitialized
237
        av_log(dest, AV_LOG_ERROR,
238
               "Tried to copy AVCodecContext %p into already-initialized %p\n",
239
               src, dest);
240
        return AVERROR(EINVAL);
241
    }
242
243
45
    copy_context_reset(dest);
244
245
45
    memcpy(dest, src, sizeof(*dest));
246
45
    av_opt_copy(dest, src);
247
248
45
    dest->priv_data       = orig_priv_data;
249
45
    dest->codec           = orig_codec;
250
251

45
    if (orig_priv_data && src->codec && src->codec->priv_class &&
252

12
        dest->codec && dest->codec->priv_class)
253
8
        av_opt_copy(orig_priv_data, src->priv_data);
254
255
256
    /* set values specific to opened codecs back to their default state */
257
45
    dest->slice_offset    = NULL;
258
45
    dest->hwaccel         = NULL;
259
45
    dest->internal        = NULL;
260
#if FF_API_CODED_FRAME
261
FF_DISABLE_DEPRECATION_WARNINGS
262
45
    dest->coded_frame     = NULL;
263
FF_ENABLE_DEPRECATION_WARNINGS
264
#endif
265
266
    /* reallocate values that should be allocated separately */
267
45
    dest->extradata       = NULL;
268
45
    dest->coded_side_data = NULL;
269
45
    dest->intra_matrix    = NULL;
270
45
    dest->inter_matrix    = NULL;
271
45
    dest->rc_override     = NULL;
272
45
    dest->subtitle_header = NULL;
273
45
    dest->hw_frames_ctx   = NULL;
274
45
    dest->hw_device_ctx   = NULL;
275
45
    dest->nb_coded_side_data = 0;
276
277
#define alloc_and_copy_or_fail(obj, size, pad) \
278
    if (src->obj && size > 0) { \
279
        dest->obj = av_malloc(size + pad); \
280
        if (!dest->obj) \
281
            goto fail; \
282
        memcpy(dest->obj, src->obj, size); \
283
        if (pad) \
284
            memset(((uint8_t *) dest->obj) + size, 0, pad); \
285
    }
286

45
    alloc_and_copy_or_fail(extradata,    src->extradata_size,
287
                           AV_INPUT_BUFFER_PADDING_SIZE);
288
45
    dest->extradata_size  = src->extradata_size;
289

45
    alloc_and_copy_or_fail(intra_matrix, 64 * sizeof(int16_t), 0);
290

45
    alloc_and_copy_or_fail(inter_matrix, 64 * sizeof(int16_t), 0);
291

45
    alloc_and_copy_or_fail(rc_override,  src->rc_override_count * sizeof(*src->rc_override), 0);
292

45
    alloc_and_copy_or_fail(subtitle_header, src->subtitle_header_size, 1);
293
45
    av_assert0(dest->subtitle_header_size == src->subtitle_header_size);
294
#undef alloc_and_copy_or_fail
295
296
45
    if (src->hw_frames_ctx) {
297
        dest->hw_frames_ctx = av_buffer_ref(src->hw_frames_ctx);
298
        if (!dest->hw_frames_ctx)
299
            goto fail;
300
    }
301
302
45
    return 0;
303
304
fail:
305
    copy_context_reset(dest);
306
    return AVERROR(ENOMEM);
307
}
308
#endif
309
310
103522
const AVClass *avcodec_get_class(void)
311
{
312
103522
    return &av_codec_context_class;
313
}
314
315
#define FOFFSET(x) offsetof(AVFrame,x)
316
317
static const AVOption frame_options[]={
318
{"best_effort_timestamp", "", FOFFSET(best_effort_timestamp), AV_OPT_TYPE_INT64, {.i64 = AV_NOPTS_VALUE }, INT64_MIN, INT64_MAX, 0},
319
{"pkt_pos", "", FOFFSET(pkt_pos), AV_OPT_TYPE_INT64, {.i64 = -1 }, INT64_MIN, INT64_MAX, 0},
320
{"pkt_size", "", FOFFSET(pkt_size), AV_OPT_TYPE_INT64, {.i64 = -1 }, INT64_MIN, INT64_MAX, 0},
321
{"sample_aspect_ratio", "", FOFFSET(sample_aspect_ratio), AV_OPT_TYPE_RATIONAL, {.dbl = 0 }, 0, INT_MAX, 0},
322
{"width", "", FOFFSET(width), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
323
{"height", "", FOFFSET(height), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
324
{"format", "", FOFFSET(format), AV_OPT_TYPE_INT, {.i64 = -1 }, 0, INT_MAX, 0},
325
{"channel_layout", "", FOFFSET(channel_layout), AV_OPT_TYPE_INT64, {.i64 = 0 }, 0, INT64_MAX, 0},
326
{"sample_rate", "", FOFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
327
{NULL},
328
};
329
330
#if FF_API_COPY_CONTEXT
331
static const AVClass av_frame_class = {
332
    .class_name              = "AVFrame",
333
    .item_name               = NULL,
334
    .option                  = frame_options,
335
    .version                 = LIBAVUTIL_VERSION_INT,
336
};
337
338
const AVClass *avcodec_get_frame_class(void)
339
{
340
    return &av_frame_class;
341
}
342
#endif
343
344
#define SROFFSET(x) offsetof(AVSubtitleRect,x)
345
346
static const AVOption subtitle_rect_options[]={
347
{"x", "", SROFFSET(x), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
348
{"y", "", SROFFSET(y), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
349
{"w", "", SROFFSET(w), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
350
{"h", "", SROFFSET(h), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
351
{"type", "", SROFFSET(type), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
352
{"flags", "", SROFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, 1, 0, "flags"},
353
{"forced", "", SROFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, 1, 0},
354
{NULL},
355
};
356
357
#if FF_API_COPY_CONTEXT
358
static const AVClass av_subtitle_rect_class = {
359
    .class_name             = "AVSubtitleRect",
360
    .item_name              = NULL,
361
    .option                 = subtitle_rect_options,
362
    .version                = LIBAVUTIL_VERSION_INT,
363
};
364
365
const AVClass *avcodec_get_subtitle_rect_class(void)
366
{
367
    return &av_subtitle_rect_class;
368
}
369
#endif