GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/extract_extradata_bsf.c Lines: 152 197 77.2 %
Date: 2020-09-25 23:16:12 Branches: 99 138 71.7 %

Line Branch Exec Source
1
/*
2
 * This file is part of FFmpeg.
3
 *
4
 * FFmpeg is free software; you can redistribute it and/or
5
 * modify it under the terms of the GNU Lesser General Public
6
 * License as published by the Free Software Foundation; either
7
 * version 2.1 of the License, or (at your option) any later version.
8
 *
9
 * FFmpeg is distributed in the hope that it will be useful,
10
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12
 * Lesser General Public License for more details.
13
 *
14
 * You should have received a copy of the GNU Lesser General Public
15
 * License along with FFmpeg; if not, write to the Free Software
16
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17
 */
18
19
#include <stdint.h>
20
21
#include "libavutil/common.h"
22
#include "libavutil/intreadwrite.h"
23
#include "libavutil/log.h"
24
#include "libavutil/opt.h"
25
26
#include "av1.h"
27
#include "av1_parse.h"
28
#include "bsf.h"
29
#include "bsf_internal.h"
30
#include "bytestream.h"
31
#include "h2645_parse.h"
32
#include "h264.h"
33
#include "hevc.h"
34
#include "vc1_common.h"
35
36
typedef struct ExtractExtradataContext {
37
    const AVClass *class;
38
39
    int (*extract)(AVBSFContext *ctx, AVPacket *pkt,
40
                   uint8_t **data, int *size);
41
42
    /* AV1 specific fields */
43
    AV1Packet av1_pkt;
44
45
    /* H264/HEVC specific fields */
46
    H2645Packet h2645_pkt;
47
48
    /* AVOptions */
49
    int remove;
50
} ExtractExtradataContext;
51
52
4876
static int val_in_array(const int *arr, int len, int val)
53
{
54
    int i;
55
13480
    for (i = 0; i < len; i++)
56
10856
        if (arr[i] == val)
57
2252
            return 1;
58
2624
    return 0;
59
}
60
61
19
static int extract_extradata_av1(AVBSFContext *ctx, AVPacket *pkt,
62
                                 uint8_t **data, int *size)
63
{
64
    static const int extradata_obu_types[] = {
65
        AV1_OBU_SEQUENCE_HEADER, AV1_OBU_METADATA,
66
    };
67
19
    ExtractExtradataContext *s = ctx->priv_data;
68
69
19
    int extradata_size = 0, filtered_size = 0;
70
19
    int nb_extradata_obu_types = FF_ARRAY_ELEMS(extradata_obu_types);
71
19
    int i, has_seq = 0, ret = 0;
72
73
19
    ret = ff_av1_packet_split(&s->av1_pkt, pkt->data, pkt->size, ctx);
74
19
    if (ret < 0)
75
        return ret;
76
77
95
    for (i = 0; i < s->av1_pkt.nb_obus; i++) {
78
76
        AV1OBU *obu = &s->av1_pkt.obus[i];
79
76
        if (val_in_array(extradata_obu_types, nb_extradata_obu_types, obu->type)) {
80
23
            extradata_size += obu->raw_size;
81
23
            if (obu->type == AV1_OBU_SEQUENCE_HEADER)
82
19
                has_seq = 1;
83
53
        } else if (s->remove) {
84
            filtered_size += obu->raw_size;
85
        }
86
    }
87
88

19
    if (extradata_size && has_seq) {
89
19
        AVBufferRef *filtered_buf = NULL;
90
        PutByteContext pb_filtered_data, pb_extradata;
91
        uint8_t *extradata;
92
93
19
        if (s->remove) {
94
            filtered_buf = av_buffer_alloc(filtered_size + AV_INPUT_BUFFER_PADDING_SIZE);
95
            if (!filtered_buf) {
96
                return AVERROR(ENOMEM);
97
            }
98
            memset(filtered_buf->data + filtered_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
99
        }
100
101
19
        extradata = av_malloc(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
102
19
        if (!extradata) {
103
            av_buffer_unref(&filtered_buf);
104
            return AVERROR(ENOMEM);
105
        }
106
107
19
        *data = extradata;
108
19
        *size = extradata_size;
109
110
19
        bytestream2_init_writer(&pb_extradata, extradata, extradata_size);
111
19
        if (s->remove)
112
            bytestream2_init_writer(&pb_filtered_data, filtered_buf->data, filtered_size);
113
114
95
        for (i = 0; i < s->av1_pkt.nb_obus; i++) {
115
76
            AV1OBU *obu = &s->av1_pkt.obus[i];
116
76
            if (val_in_array(extradata_obu_types, nb_extradata_obu_types,
117
                             obu->type)) {
118
23
                bytestream2_put_bufferu(&pb_extradata, obu->raw_data, obu->raw_size);
119
53
            } else if (s->remove) {
120
                bytestream2_put_bufferu(&pb_filtered_data, obu->raw_data, obu->raw_size);
121
            }
122
        }
123
124
19
        if (s->remove) {
125
            av_buffer_unref(&pkt->buf);
126
            pkt->buf  = filtered_buf;
127
            pkt->data = filtered_buf->data;
128
            pkt->size = filtered_size;
129
        }
130
    }
131
132
19
    return 0;
133
}
134
135
455
static int extract_extradata_h2645(AVBSFContext *ctx, AVPacket *pkt,
136
                                   uint8_t **data, int *size)
137
{
138
    static const int extradata_nal_types_hevc[] = {
139
        HEVC_NAL_VPS, HEVC_NAL_SPS, HEVC_NAL_PPS,
140
    };
141
    static const int extradata_nal_types_h264[] = {
142
        H264_NAL_SPS, H264_NAL_PPS,
143
    };
144
145
455
    ExtractExtradataContext *s = ctx->priv_data;
146
147
455
    int extradata_size = 0, filtered_size = 0;
148
    const int *extradata_nal_types;
149
    int nb_extradata_nal_types;
150
455
    int i, has_sps = 0, has_vps = 0, ret = 0;
151
152
455
    if (ctx->par_in->codec_id == AV_CODEC_ID_HEVC) {
153
211
        extradata_nal_types    = extradata_nal_types_hevc;
154
211
        nb_extradata_nal_types = FF_ARRAY_ELEMS(extradata_nal_types_hevc);
155
    } else {
156
244
        extradata_nal_types    = extradata_nal_types_h264;
157
244
        nb_extradata_nal_types = FF_ARRAY_ELEMS(extradata_nal_types_h264);
158
    }
159
160
455
    ret = ff_h2645_packet_split(&s->h2645_pkt, pkt->data, pkt->size,
161
455
                                ctx, 0, 0, ctx->par_in->codec_id, 1, 0);
162
455
    if (ret < 0)
163
        return ret;
164
165
2926
    for (i = 0; i < s->h2645_pkt.nb_nals; i++) {
166
2471
        H2645NAL *nal = &s->h2645_pkt.nals[i];
167
2471
        if (val_in_array(extradata_nal_types, nb_extradata_nal_types, nal->type)) {
168
1103
            extradata_size += nal->raw_size + 3;
169
1103
            if (ctx->par_in->codec_id == AV_CODEC_ID_HEVC) {
170
655
                if (nal->type == HEVC_NAL_SPS) has_sps = 1;
171
655
                if (nal->type == HEVC_NAL_VPS) has_vps = 1;
172
            } else {
173
448
                if (nal->type == H264_NAL_SPS) has_sps = 1;
174
            }
175
1368
        } else if (s->remove) {
176
            filtered_size += nal->raw_size + 3;
177
        }
178
    }
179
180
455
    if (extradata_size &&
181

409
        ((ctx->par_in->codec_id == AV_CODEC_ID_HEVC && has_sps && has_vps) ||
182

220
         (ctx->par_in->codec_id == AV_CODEC_ID_H264 && has_sps))) {
183
409
        AVBufferRef *filtered_buf = NULL;
184
        PutByteContext pb_filtered_data, pb_extradata;
185
        uint8_t *extradata;
186
187
409
        if (s->remove) {
188
            filtered_buf = av_buffer_alloc(filtered_size + AV_INPUT_BUFFER_PADDING_SIZE);
189
            if (!filtered_buf) {
190
                return AVERROR(ENOMEM);
191
            }
192
            memset(filtered_buf->data + filtered_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
193
        }
194
195
409
        extradata = av_malloc(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
196
409
        if (!extradata) {
197
            av_buffer_unref(&filtered_buf);
198
            return AVERROR(ENOMEM);
199
        }
200
201
409
        *data = extradata;
202
409
        *size = extradata_size;
203
204
409
        bytestream2_init_writer(&pb_extradata, extradata, extradata_size);
205
409
        if (s->remove)
206
            bytestream2_init_writer(&pb_filtered_data, filtered_buf->data, filtered_size);
207
208
2662
        for (i = 0; i < s->h2645_pkt.nb_nals; i++) {
209
2253
            H2645NAL *nal = &s->h2645_pkt.nals[i];
210
2253
            if (val_in_array(extradata_nal_types, nb_extradata_nal_types,
211
                             nal->type)) {
212
1103
                bytestream2_put_be24u(&pb_extradata, 1); //startcode
213
1103
                bytestream2_put_bufferu(&pb_extradata, nal->raw_data, nal->raw_size);
214
1150
            } else if (s->remove) {
215
                bytestream2_put_be24u(&pb_filtered_data, 1); // startcode
216
                bytestream2_put_bufferu(&pb_filtered_data, nal->raw_data, nal->raw_size);
217
            }
218
        }
219
220
409
        if (s->remove) {
221
            av_buffer_unref(&pkt->buf);
222
            pkt->buf  = filtered_buf;
223
            pkt->data = filtered_buf->data;
224
            pkt->size = filtered_size;
225
        }
226
    }
227
228
455
    return 0;
229
}
230
231
6
static int extract_extradata_vc1(AVBSFContext *ctx, AVPacket *pkt,
232
                                 uint8_t **data, int *size)
233
{
234
6
    ExtractExtradataContext *s = ctx->priv_data;
235
6
    const uint8_t *ptr = pkt->data, *end = pkt->data + pkt->size;
236
6
    uint32_t state = UINT32_MAX;
237
6
    int has_extradata = 0, extradata_size = 0;
238
239
23
    while (ptr < end) {
240
23
        ptr = avpriv_find_start_code(ptr, end, &state);
241

23
        if (state == VC1_CODE_SEQHDR || state == VC1_CODE_ENTRYPOINT) {
242
17
            has_extradata = 1;
243

6
        } else if (has_extradata && IS_MARKER(state)) {
244
6
            extradata_size = ptr - 4 - pkt->data;
245
6
            break;
246
        }
247
    }
248
249
6
    if (extradata_size) {
250
6
        *data = av_malloc(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
251
6
        if (!*data)
252
            return AVERROR(ENOMEM);
253
254
6
        memcpy(*data, pkt->data, extradata_size);
255
6
        *size = extradata_size;
256
257
6
        if (s->remove) {
258
            pkt->data += extradata_size;
259
            pkt->size -= extradata_size;
260
        }
261
    }
262
263
6
    return 0;
264
}
265
266
376
static int extract_extradata_mpeg12(AVBSFContext *ctx, AVPacket *pkt,
267
                                     uint8_t **data, int *size)
268
{
269
376
    ExtractExtradataContext *s = ctx->priv_data;
270
376
    uint32_t state = UINT32_MAX;
271
376
    int i, found = 0;
272
273
2699357
    for (i = 0; i < pkt->size; i++) {
274
2699148
        state = (state << 8) | pkt->data[i];
275
2699148
        if (state == 0x1B3)
276
167
            found = 1;
277


2698981
        else if (found && state != 0x1B5 && state < 0x200 && state >= 0x100) {
278
167
            *size = i - 3;
279
167
            *data = av_malloc(*size + AV_INPUT_BUFFER_PADDING_SIZE);
280
167
            if (!*data)
281
                return AVERROR(ENOMEM);
282
283
167
            memcpy(*data, pkt->data, *size);
284
285
167
            if (s->remove) {
286
                pkt->data += *size;
287
                pkt->size -= *size;
288
            }
289
167
            break;
290
        }
291
    }
292
376
    return 0;
293
}
294
295
118
static int extract_extradata_mpeg4(AVBSFContext *ctx, AVPacket *pkt,
296
                                   uint8_t **data, int *size)
297
{
298
118
    ExtractExtradataContext *s = ctx->priv_data;
299
118
    const uint8_t *ptr = pkt->data, *end = pkt->data + pkt->size;
300
118
    uint32_t state = UINT32_MAX;
301
302
389
    while (ptr < end) {
303
389
        ptr = avpriv_find_start_code(ptr, end, &state);
304

389
        if (state == 0x1B3 || state == 0x1B6) {
305
118
            if (ptr - pkt->data > 4) {
306
68
                *size = ptr - 4 - pkt->data;
307
68
                *data = av_malloc(*size + AV_INPUT_BUFFER_PADDING_SIZE);
308
68
                if (!*data)
309
                    return AVERROR(ENOMEM);
310
311
68
                memcpy(*data, pkt->data, *size);
312
313
68
                if (s->remove) {
314
                    pkt->data += *size;
315
                    pkt->size -= *size;
316
                }
317
            }
318
118
            break;
319
        }
320
    }
321
118
    return 0;
322
}
323
324
static const struct {
325
    enum AVCodecID id;
326
    int (*extract)(AVBSFContext *ctx, AVPacket *pkt,
327
                   uint8_t **data, int *size);
328
} extract_tab[] = {
329
    { AV_CODEC_ID_AV1,        extract_extradata_av1     },
330
    { AV_CODEC_ID_AVS2,       extract_extradata_mpeg4   },
331
    { AV_CODEC_ID_CAVS,       extract_extradata_mpeg4   },
332
    { AV_CODEC_ID_H264,       extract_extradata_h2645   },
333
    { AV_CODEC_ID_HEVC,       extract_extradata_h2645   },
334
    { AV_CODEC_ID_MPEG1VIDEO, extract_extradata_mpeg12  },
335
    { AV_CODEC_ID_MPEG2VIDEO, extract_extradata_mpeg12  },
336
    { AV_CODEC_ID_MPEG4,      extract_extradata_mpeg4   },
337
    { AV_CODEC_ID_VC1,        extract_extradata_vc1     },
338
};
339
340
673
static int extract_extradata_init(AVBSFContext *ctx)
341
{
342
673
    ExtractExtradataContext *s = ctx->priv_data;
343
    int i;
344
345
3616
    for (i = 0; i < FF_ARRAY_ELEMS(extract_tab); i++) {
346
3616
        if (extract_tab[i].id == ctx->par_in->codec_id) {
347
673
            s->extract = extract_tab[i].extract;
348
673
            break;
349
        }
350
    }
351
673
    if (!s->extract)
352
        return AVERROR_BUG;
353
354
673
    return 0;
355
}
356
357
1279
static int extract_extradata_filter(AVBSFContext *ctx, AVPacket *pkt)
358
{
359
1279
    ExtractExtradataContext *s = ctx->priv_data;
360
1279
    uint8_t *extradata = NULL;
361
    int extradata_size;
362
1279
    int ret = 0;
363
364
1279
    ret = ff_bsf_get_packet_ref(ctx, pkt);
365
1279
    if (ret < 0)
366
305
        return ret;
367
368
974
    ret = s->extract(ctx, pkt, &extradata, &extradata_size);
369
974
    if (ret < 0)
370
        goto fail;
371
372
974
    if (extradata) {
373
669
        memset(extradata + extradata_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
374
669
        ret = av_packet_add_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
375
                                      extradata, extradata_size);
376
669
        if (ret < 0) {
377
            av_freep(&extradata);
378
            goto fail;
379
        }
380
    }
381
382
974
    return 0;
383
384
fail:
385
    av_packet_unref(pkt);
386
    return ret;
387
}
388
389
673
static void extract_extradata_close(AVBSFContext *ctx)
390
{
391
673
    ExtractExtradataContext *s = ctx->priv_data;
392
673
    ff_av1_packet_uninit(&s->av1_pkt);
393
673
    ff_h2645_packet_uninit(&s->h2645_pkt);
394
673
}
395
396
static const enum AVCodecID codec_ids[] = {
397
    AV_CODEC_ID_AV1,
398
    AV_CODEC_ID_AVS2,
399
    AV_CODEC_ID_CAVS,
400
    AV_CODEC_ID_H264,
401
    AV_CODEC_ID_HEVC,
402
    AV_CODEC_ID_MPEG1VIDEO,
403
    AV_CODEC_ID_MPEG2VIDEO,
404
    AV_CODEC_ID_MPEG4,
405
    AV_CODEC_ID_VC1,
406
    AV_CODEC_ID_NONE,
407
};
408
409
#define OFFSET(x) offsetof(ExtractExtradataContext, x)
410
#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM)
411
static const AVOption options[] = {
412
    { "remove", "remove the extradata from the bitstream", OFFSET(remove), AV_OPT_TYPE_INT,
413
        { .i64 = 0 }, 0, 1, FLAGS },
414
    { NULL },
415
};
416
417
static const AVClass extract_extradata_class = {
418
    .class_name = "extract_extradata",
419
    .item_name  = av_default_item_name,
420
    .option     = options,
421
    .version    = LIBAVUTIL_VERSION_INT,
422
};
423
424
const AVBitStreamFilter ff_extract_extradata_bsf = {
425
    .name           = "extract_extradata",
426
    .codec_ids      = codec_ids,
427
    .priv_data_size = sizeof(ExtractExtradataContext),
428
    .priv_class     = &extract_extradata_class,
429
    .init           = extract_extradata_init,
430
    .filter         = extract_extradata_filter,
431
    .close          = extract_extradata_close,
432
};