aboutsummaryrefslogtreecommitdiffstats
path: root/libavcodec/cbs_sei_syntax_template.c
blob: 0205bb47aa3f415a0984eb6c8e89eae82a89d265 (plain) (blame)
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
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
/*
 * 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
 */

SEI_FUNC(filler_payload, (CodedBitstreamContext *ctx, RWContext *rw,
                          SEIRawFillerPayload *current,
                          SEIMessageState *state))
{
    int err, i;

    HEADER("Filler Payload");

#ifdef READ
    current->payload_size = state->payload_size;
#endif

    for (i = 0; i < current->payload_size; i++)
        fixed(8, ff_byte, 0xff);

    return 0;
}

SEI_FUNC(user_data_registered, (CodedBitstreamContext *ctx, RWContext *rw,
                                SEIRawUserDataRegistered *current,
                                SEIMessageState *state))
{
    int err, i, j;

    HEADER("User Data Registered ITU-T T.35");

    u(8, itu_t_t35_country_code, 0x00, 0xff);
    if (current->itu_t_t35_country_code != 0xff)
        i = 1;
    else {
        u(8, itu_t_t35_country_code_extension_byte, 0x00, 0xff);
        i = 2;
    }

#ifdef READ
    if (state->payload_size < i) {
        av_log(ctx->log_ctx, AV_LOG_ERROR,
               "Invalid SEI user data registered payload.\n");
        return AVERROR_INVALIDDATA;
    }
    current->data_length = state->payload_size - i;
#endif

    allocate(current->data, current->data_length);
    for (j = 0; j < current->data_length; j++)
        xu(8, itu_t_t35_payload_byte[], current->data[j], 0x00, 0xff, 1, i + j);

    return 0;
}

SEI_FUNC(user_data_unregistered, (CodedBitstreamContext *ctx, RWContext *rw,
                                  SEIRawUserDataUnregistered *current,
                                  SEIMessageState *state))
{
    int err, i;

    HEADER("User Data Unregistered");

#ifdef READ
    if (state->payload_size < 16) {
        av_log(ctx->log_ctx, AV_LOG_ERROR,
               "Invalid SEI user data unregistered payload.\n");
        return AVERROR_INVALIDDATA;
    }
    current->data_length = state->payload_size - 16;
#endif

    for (i = 0; i < 16; i++)
        us(8, uuid_iso_iec_11578[i], 0x00, 0xff, 1, i);

    allocate(current->data, current->data_length);

    for (i = 0; i < current->data_length; i++)
        xu(8, user_data_payload_byte[i], current->data[i], 0x00, 0xff, 1, i);

    return 0;
}

SEI_FUNC(frame_packing_arrangement, (CodedBitstreamContext *ctx, RWContext *rw,
                                     SEIRawFramePackingArrangement *current,
                                     SEIMessageState *unused))
{
    int err;

    HEADER("Frame Packing Arrangement");

    ue(fp_arrangement_id, 0, MAX_UINT_BITS(31));
    flag(fp_arrangement_cancel_flag);
    if (!current->fp_arrangement_cancel_flag) {
        u(7, fp_arrangement_type, 3, 5);
        flag(fp_quincunx_sampling_flag);
        u(6, fp_content_interpretation_type, 0, 2);
        flag(fp_spatial_flipping_flag);
        flag(fp_frame0_flipped_flag);
        flag(fp_field_views_flag);
        flag(fp_current_frame_is_frame0_flag);
        flag(fp_frame0_self_contained_flag);
        flag(fp_frame1_self_contained_flag);
        if (!current->fp_quincunx_sampling_flag && current->fp_arrangement_type != 5) {
            ub(4, fp_frame0_grid_position_x);
            ub(4, fp_frame0_grid_position_y);
            ub(4, fp_frame1_grid_position_x);
            ub(4, fp_frame1_grid_position_y);
        }
        fixed(8, fp_arrangement_reserved_byte, 0);
        flag(fp_arrangement_persistence_flag);
    }
    flag(fp_upsampled_aspect_ratio_flag);

    return 0;
}

SEI_FUNC(decoded_picture_hash, (CodedBitstreamContext *ctx,
                                RWContext *rw,
                                SEIRawDecodedPictureHash *current,
                                SEIMessageState *unused))
{
    int err, c_idx, i;

    HEADER("Decoded Picture Hash");

    u(8, dph_sei_hash_type, 0, 2);
    flag(dph_sei_single_component_flag);
    ub(7, dph_sei_reserved_zero_7bits);

    for (c_idx = 0; c_idx < (current->dph_sei_single_component_flag ? 1 : 3);
         c_idx++) {
        if (current->dph_sei_hash_type == 0) {
            for (i = 0; i < 16; i++)
                us(8, dph_sei_picture_md5[c_idx][i], 0x00, 0xff, 2, c_idx, i);
        } else if (current->dph_sei_hash_type == 1) {
            us(16, dph_sei_picture_crc[c_idx], 0x0000, 0xffff, 1, c_idx);
        } else if (current->dph_sei_hash_type == 2) {
            us(32, dph_sei_picture_checksum[c_idx], 0x00000000, 0xffffffff, 1,
               c_idx);
        }
    }
    return 0;
}

SEI_FUNC(mastering_display_colour_volume,
         (CodedBitstreamContext *ctx, RWContext *rw,
          SEIRawMasteringDisplayColourVolume *current,
          SEIMessageState *state))
{
    int err, c;

    HEADER("Mastering Display Colour Volume");

    for (c = 0; c < 3; c++) {
        ubs(16, display_primaries_x[c], 1, c);
        ubs(16, display_primaries_y[c], 1, c);
    }

    ub(16, white_point_x);
    ub(16, white_point_y);

    ub(32, max_display_mastering_luminance);
    ub(32, min_display_mastering_luminance);

    return 0;
}

SEI_FUNC(content_light_level_info, (CodedBitstreamContext *ctx, RWContext *rw,
                                    SEIRawContentLightLevelInfo *current,
                                    SEIMessageState *state))
{
    int err;

    HEADER("Content Light Level Information");

    ub(16, max_content_light_level);
    ub(16, max_pic_average_light_level);

    return 0;
}

SEI_FUNC(alternative_transfer_characteristics,
         (CodedBitstreamContext *ctx, RWContext *rw,
          SEIRawAlternativeTransferCharacteristics *current,
          SEIMessageState *state))
{
    int err;

    HEADER("Alternative Transfer Characteristics");

    ub(8, preferred_transfer_characteristics);

    return 0;
}

SEI_FUNC(ambient_viewing_environment,
         (CodedBitstreamContext *ctx, RWContext *rw,
          SEIRawAmbientViewingEnvironment *current,
          SEIMessageState *state))
{
    static const uint16_t max_ambient_light_value = 50000;
    int err;

    HEADER("Ambient Viewing Environment");

    u(32, ambient_illuminance, 1, MAX_UINT_BITS(32));
    u(16, ambient_light_x, 0, max_ambient_light_value);
    u(16, ambient_light_y, 0, max_ambient_light_value);

    return 0;
}

static int FUNC(message)(CodedBitstreamContext *ctx, RWContext *rw,
                         SEIRawMessage *current)
{
    const SEIMessageTypeDescriptor *desc;
    int err, i;

    desc = ff_cbs_sei_find_type(ctx, current->payload_type);
    if (desc) {
        SEIMessageState state = {
            .payload_type      = current->payload_type,
            .payload_size      = current->payload_size,
            .extension_present = current->extension_bit_length > 0,
        };
        int start_position, current_position, bits_written;

#ifdef READ
        CHECK(ff_cbs_sei_alloc_message_payload(current, desc));
#endif

        start_position = bit_position(rw);

        CHECK(desc->READWRITE(ctx, rw, current->payload, &state));

        current_position = bit_position(rw);
        bits_written = current_position - start_position;

        if (byte_alignment(rw) || state.extension_present ||
            bits_written < 8 * current->payload_size) {
            size_t bits_left;

#ifdef READ
            GetBitContext tmp = *rw;
            int trailing_bits, trailing_zero_bits;

            bits_left = 8 * current->payload_size - bits_written;
            if (bits_left > 8)
                skip_bits_long(&tmp, bits_left - 8);
            trailing_bits = get_bits(&tmp, FFMIN(bits_left, 8));
            if (trailing_bits == 0) {
                // The trailing bits must contain a bit_equal_to_one, so
                // they can't all be zero.
                return AVERROR_INVALIDDATA;
            }
            trailing_zero_bits = ff_ctz(trailing_bits);
            current->extension_bit_length =
                bits_left - 1 - trailing_zero_bits;
#endif

            if (current->extension_bit_length > 0) {
                allocate(current->extension_data,
                         (current->extension_bit_length + 7) / 8);

                bits_left = current->extension_bit_length;
                for (i = 0; bits_left > 0; i++) {
                    int length = FFMIN(bits_left, 8);
                    xu(length, reserved_payload_extension_data,
                       current->extension_data[i],
                       0, MAX_UINT_BITS(length), 0);
                    bits_left -= length;
                }
            }

            fixed(1, bit_equal_to_one, 1);
            while (byte_alignment(rw))
                fixed(1, bit_equal_to_zero, 0);
        }

#ifdef WRITE
        current->payload_size = (put_bits_count(rw) - start_position) / 8;
#endif
    } else {
        uint8_t *data;

#ifdef READ
        allocate(current->payload_ref, current->payload_size);
        current->payload = current->payload_ref;
#else
        allocate(current->payload, current->payload_size);
#endif
        data = current->payload;

        for (i = 0; i < current->payload_size; i++)
            xu(8, payload_byte[i], data[i], 0, 255, 1, i);
    }

    return 0;
}

static int FUNC(message_list)(CodedBitstreamContext *ctx, RWContext *rw,
                              SEIRawMessageList *current, int prefix)
{
    SEIRawMessage *message;
    int err, k;

#ifdef READ
    for (k = 0;; k++) {
        uint32_t payload_type = 0;
        uint32_t payload_size = 0;
        uint32_t tmp;
        GetBitContext payload_gbc;

        while (show_bits(rw, 8) == 0xff) {
            fixed(8, ff_byte, 0xff);
            payload_type += 255;
        }
        xu(8, last_payload_type_byte, tmp, 0, 254, 0);
        payload_type += tmp;

        while (show_bits(rw, 8) == 0xff) {
            fixed(8, ff_byte, 0xff);
            payload_size += 255;
        }
        xu(8, last_payload_size_byte, tmp, 0, 254, 0);
        payload_size += tmp;

        // There must be space remaining for both the payload and
        // the trailing bits on the SEI NAL unit.
        if (payload_size + 1 > get_bits_left(rw) / 8) {
            av_log(ctx->log_ctx, AV_LOG_ERROR,
                   "Invalid SEI message: payload_size too large "
                   "(%"PRIu32" bytes).\n", payload_size);
            return AVERROR_INVALIDDATA;
        }
        CHECK(init_get_bits(&payload_gbc, rw->buffer,
                            get_bits_count(rw) + 8 * payload_size));
        skip_bits_long(&payload_gbc, get_bits_count(rw));

        CHECK(ff_cbs_sei_list_add(current));
        message = &current->messages[k];

        message->payload_type = payload_type;
        message->payload_size = payload_size;

        CHECK(FUNC(message)(ctx, &payload_gbc, message));

        skip_bits_long(rw, 8 * payload_size);

        if (!cbs_h2645_read_more_rbsp_data(rw))
            break;
    }
#else
    for (k = 0; k < current->nb_messages; k++) {
        PutBitContext start_state;
        uint32_t tmp;
        int trace, i;

        message = &current->messages[k];

        // We write the payload twice in order to find the size.  Trace
        // output is switched off for the first write.
        trace = ctx->trace_enable;
        ctx->trace_enable = 0;

        start_state = *rw;
        for (i = 0; i < 2; i++) {
            *rw = start_state;

            tmp = message->payload_type;
            while (tmp >= 255) {
                fixed(8, ff_byte, 0xff);
                tmp -= 255;
            }
            xu(8, last_payload_type_byte, tmp, 0, 254, 0);

            tmp = message->payload_size;
            while (tmp >= 255) {
                fixed(8, ff_byte, 0xff);
                tmp -= 255;
            }
            xu(8, last_payload_size_byte, tmp, 0, 254, 0);

            err = FUNC(message)(ctx, rw, message);
            ctx->trace_enable = trace;
            if (err < 0)
                return err;
        }
    }
#endif

    return 0;
}