GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/h264_ps.c Lines: 405 508 79.7 %
Date: 2020-04-02 05:41:20 Branches: 235 344 68.3 %

Line Branch Exec Source
1
/*
2
 * H.26L/H.264/AVC/JVT/14496-10/... parameter set decoding
3
 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
4
 *
5
 * 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
10
 * 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
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 FFmpeg; 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
 * H.264 / AVC / MPEG-4 part10 parameter set decoding.
25
 * @author Michael Niedermayer <michaelni@gmx.at>
26
 */
27
28
#include <inttypes.h>
29
30
#include "libavutil/imgutils.h"
31
#include "internal.h"
32
#include "mathops.h"
33
#include "avcodec.h"
34
#include "h264data.h"
35
#include "h264_ps.h"
36
#include "golomb.h"
37
38
#define MIN_LOG2_MAX_FRAME_NUM    4
39
40
#define EXTENDED_SAR       255
41
42
static const uint8_t default_scaling4[2][16] = {
43
    {  6, 13, 20, 28, 13, 20, 28, 32,
44
      20, 28, 32, 37, 28, 32, 37, 42 },
45
    { 10, 14, 20, 24, 14, 20, 24, 27,
46
      20, 24, 27, 30, 24, 27, 30, 34 }
47
};
48
49
static const uint8_t default_scaling8[2][64] = {
50
    {  6, 10, 13, 16, 18, 23, 25, 27,
51
      10, 11, 16, 18, 23, 25, 27, 29,
52
      13, 16, 18, 23, 25, 27, 29, 31,
53
      16, 18, 23, 25, 27, 29, 31, 33,
54
      18, 23, 25, 27, 29, 31, 33, 36,
55
      23, 25, 27, 29, 31, 33, 36, 38,
56
      25, 27, 29, 31, 33, 36, 38, 40,
57
      27, 29, 31, 33, 36, 38, 40, 42 },
58
    {  9, 13, 15, 17, 19, 21, 22, 24,
59
      13, 13, 17, 19, 21, 22, 24, 25,
60
      15, 17, 19, 21, 22, 24, 25, 27,
61
      17, 19, 21, 22, 24, 25, 27, 28,
62
      19, 21, 22, 24, 25, 27, 28, 30,
63
      21, 22, 24, 25, 27, 28, 30, 32,
64
      22, 24, 25, 27, 28, 30, 32, 33,
65
      24, 25, 27, 28, 30, 32, 33, 35 }
66
};
67
68
/* maximum number of MBs in the DPB for a given level */
69
static const int level_max_dpb_mbs[][2] = {
70
    { 10, 396       },
71
    { 11, 900       },
72
    { 12, 2376      },
73
    { 13, 2376      },
74
    { 20, 2376      },
75
    { 21, 4752      },
76
    { 22, 8100      },
77
    { 30, 8100      },
78
    { 31, 18000     },
79
    { 32, 20480     },
80
    { 40, 32768     },
81
    { 41, 32768     },
82
    { 42, 34816     },
83
    { 50, 110400    },
84
    { 51, 184320    },
85
    { 52, 184320    },
86
};
87
88
13814
static void remove_pps(H264ParamSets *s, int id)
89
{
90
13814
    av_buffer_unref(&s->pps_list[id]);
91
13814
}
92
93
803
static void remove_sps(H264ParamSets *s, int id)
94
{
95
#if 0
96
    int i;
97
    if (s->sps_list[id]) {
98
        /* drop all PPS that depend on this SPS */
99
        for (i = 0; i < FF_ARRAY_ELEMS(s->pps_list); i++)
100
            if (s->pps_list[i] && ((PPS*)s->pps_list[i]->data)->sps_id == id)
101
                remove_pps(s, i);
102
    }
103
#endif
104
803
    av_buffer_unref(&s->sps_list[id]);
105
803
}
106
107
112
static inline int decode_hrd_parameters(GetBitContext *gb, void *logctx,
108
                                        SPS *sps)
109
{
110
    int cpb_count, i;
111
112
    cpb_count = get_ue_golomb_31(gb) + 1;
112
113
112
    if (cpb_count > 32U) {
114
        av_log(logctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
115
        return AVERROR_INVALIDDATA;
116
    }
117
118
112
    get_bits(gb, 4); /* bit_rate_scale */
119
112
    get_bits(gb, 4); /* cpb_size_scale */
120
224
    for (i = 0; i < cpb_count; i++) {
121
112
        get_ue_golomb_long(gb); /* bit_rate_value_minus1 */
122
112
        get_ue_golomb_long(gb); /* cpb_size_value_minus1 */
123
112
        get_bits1(gb);          /* cbr_flag */
124
    }
125
112
    sps->initial_cpb_removal_delay_length = get_bits(gb, 5) + 1;
126
112
    sps->cpb_removal_delay_length         = get_bits(gb, 5) + 1;
127
112
    sps->dpb_output_delay_length          = get_bits(gb, 5) + 1;
128
112
    sps->time_offset_length               = get_bits(gb, 5);
129
112
    sps->cpb_cnt                          = cpb_count;
130
112
    return 0;
131
}
132
133
549
static inline int decode_vui_parameters(GetBitContext *gb, void *logctx,
134
                                        SPS *sps)
135
{
136
    int aspect_ratio_info_present_flag;
137
    unsigned int aspect_ratio_idc;
138
139
549
    aspect_ratio_info_present_flag = get_bits1(gb);
140
141
549
    if (aspect_ratio_info_present_flag) {
142
195
        aspect_ratio_idc = get_bits(gb, 8);
143
195
        if (aspect_ratio_idc == EXTENDED_SAR) {
144
35
            sps->sar.num = get_bits(gb, 16);
145
35
            sps->sar.den = get_bits(gb, 16);
146
160
        } else if (aspect_ratio_idc < FF_ARRAY_ELEMS(ff_h264_pixel_aspect)) {
147
160
            sps->sar = ff_h264_pixel_aspect[aspect_ratio_idc];
148
        } else {
149
            av_log(logctx, AV_LOG_ERROR, "illegal aspect ratio\n");
150
            return AVERROR_INVALIDDATA;
151
        }
152
    } else {
153
354
        sps->sar.num =
154
354
        sps->sar.den = 0;
155
    }
156
157
549
    if (get_bits1(gb))      /* overscan_info_present_flag */
158
42
        get_bits1(gb);      /* overscan_appropriate_flag */
159
160
549
    sps->video_signal_type_present_flag = get_bits1(gb);
161
549
    if (sps->video_signal_type_present_flag) {
162
96
        get_bits(gb, 3);                 /* video_format */
163
96
        sps->full_range = get_bits1(gb); /* video_full_range_flag */
164
165
96
        sps->colour_description_present_flag = get_bits1(gb);
166
96
        if (sps->colour_description_present_flag) {
167
76
            sps->color_primaries = get_bits(gb, 8); /* colour_primaries */
168
76
            sps->color_trc       = get_bits(gb, 8); /* transfer_characteristics */
169
76
            sps->colorspace      = get_bits(gb, 8); /* matrix_coefficients */
170
171
            // Set invalid values to "unspecified"
172
76
            if (!av_color_primaries_name(sps->color_primaries))
173
                sps->color_primaries = AVCOL_PRI_UNSPECIFIED;
174
76
            if (!av_color_transfer_name(sps->color_trc))
175
                sps->color_trc = AVCOL_TRC_UNSPECIFIED;
176
76
            if (!av_color_space_name(sps->colorspace))
177
                sps->colorspace = AVCOL_SPC_UNSPECIFIED;
178
        }
179
    }
180
181
    /* chroma_location_info_present_flag */
182
549
    if (get_bits1(gb)) {
183
        /* chroma_sample_location_type_top_field */
184
61
        sps->chroma_location = get_ue_golomb(gb) + 1;
185
61
        get_ue_golomb(gb);  /* chroma_sample_location_type_bottom_field */
186
    } else
187
488
        sps->chroma_location = AVCHROMA_LOC_LEFT;
188
189

549
    if (show_bits1(gb) && get_bits_left(gb) < 10) {
190
        av_log(logctx, AV_LOG_WARNING, "Truncated VUI (%d)\n", get_bits_left(gb));
191
        return 0;
192
    }
193
194
549
    sps->timing_info_present_flag = get_bits1(gb);
195
549
    if (sps->timing_info_present_flag) {
196
488
        unsigned num_units_in_tick = get_bits_long(gb, 32);
197
488
        unsigned time_scale        = get_bits_long(gb, 32);
198

488
        if (!num_units_in_tick || !time_scale) {
199
            av_log(logctx, AV_LOG_ERROR,
200
                   "time_scale/num_units_in_tick invalid or unsupported (%u/%u)\n",
201
                   time_scale, num_units_in_tick);
202
            sps->timing_info_present_flag = 0;
203
        } else {
204
488
            sps->num_units_in_tick = num_units_in_tick;
205
488
            sps->time_scale = time_scale;
206
        }
207
488
        sps->fixed_frame_rate_flag = get_bits1(gb);
208
    }
209
210
549
    sps->nal_hrd_parameters_present_flag = get_bits1(gb);
211
549
    if (sps->nal_hrd_parameters_present_flag)
212
81
        if (decode_hrd_parameters(gb, logctx, sps) < 0)
213
            return AVERROR_INVALIDDATA;
214
549
    sps->vcl_hrd_parameters_present_flag = get_bits1(gb);
215
549
    if (sps->vcl_hrd_parameters_present_flag)
216
31
        if (decode_hrd_parameters(gb, logctx, sps) < 0)
217
            return AVERROR_INVALIDDATA;
218
549
    if (sps->nal_hrd_parameters_present_flag ||
219
468
        sps->vcl_hrd_parameters_present_flag)
220
81
        get_bits1(gb);     /* low_delay_hrd_flag */
221
549
    sps->pic_struct_present_flag = get_bits1(gb);
222
549
    if (!get_bits_left(gb))
223
        return 0;
224
549
    sps->bitstream_restriction_flag = get_bits1(gb);
225
549
    if (sps->bitstream_restriction_flag) {
226
454
        get_bits1(gb);     /* motion_vectors_over_pic_boundaries_flag */
227
454
        get_ue_golomb(gb); /* max_bytes_per_pic_denom */
228
454
        get_ue_golomb(gb); /* max_bits_per_mb_denom */
229
454
        get_ue_golomb(gb); /* log2_max_mv_length_horizontal */
230
454
        get_ue_golomb(gb); /* log2_max_mv_length_vertical */
231
454
        sps->num_reorder_frames = get_ue_golomb(gb);
232
454
        get_ue_golomb(gb); /*max_dec_frame_buffering*/
233
234
454
        if (get_bits_left(gb) < 0) {
235
2
            sps->num_reorder_frames         = 0;
236
2
            sps->bitstream_restriction_flag = 0;
237
        }
238
239
454
        if (sps->num_reorder_frames > 16U
240
            /* max_dec_frame_buffering || max_dec_frame_buffering > 16 */) {
241
            av_log(logctx, AV_LOG_ERROR,
242
                   "Clipping illegal num_reorder_frames %d\n",
243
                   sps->num_reorder_frames);
244
            sps->num_reorder_frames = 16;
245
            return AVERROR_INVALIDDATA;
246
        }
247
    }
248
249
549
    return 0;
250
}
251
252
2280
static int decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size,
253
                                const uint8_t *jvt_list,
254
                                const uint8_t *fallback_list)
255
{
256
2280
    int i, last = 8, next = 8;
257
2280
    const uint8_t *scan = size == 16 ? ff_zigzag_scan : ff_zigzag_direct;
258
2280
    if (!get_bits1(gb)) /* matrix not written, we use the predicted one */
259
1140
        memcpy(factors, fallback_list, size * sizeof(uint8_t));
260
    else
261
30580
        for (i = 0; i < size; i++) {
262
29544
            if (next) {
263
27536
                int v = get_se_golomb(gb);
264

27536
                if (v < -128 || v > 127) {
265
                    av_log(NULL, AV_LOG_ERROR, "delta scale %d is invalid\n", v);
266
                    return AVERROR_INVALIDDATA;
267
                }
268
27536
                next = (last + v) & 0xff;
269
            }
270

29544
            if (!i && !next) { /* matrix not written, we use the preset one */
271
104
                memcpy(factors, jvt_list, size * sizeof(uint8_t));
272
104
                break;
273
            }
274
29440
            last = factors[scan[i]] = next ? next : last;
275
        }
276
2280
    return 0;
277
}
278
279
/* returns non zero if the provided SPS scaling matrix has been filled */
280
1284
static int decode_scaling_matrices(GetBitContext *gb, const SPS *sps,
281
                                    const PPS *pps, int is_sps,
282
                                    uint8_t(*scaling_matrix4)[16],
283
                                    uint8_t(*scaling_matrix8)[64])
284
{
285

1284
    int fallback_sps = !is_sps && sps->scaling_matrix_present;
286
5136
    const uint8_t *fallback[4] = {
287
1284
        fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
288
1284
        fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
289
1284
        fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
290
1284
        fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1]
291
    };
292
1284
    int ret = 0;
293
1284
    if (get_bits1(gb)) {
294
285
        ret |= decode_scaling_list(gb, scaling_matrix4[0], 16, default_scaling4[0], fallback[0]);        // Intra, Y
295
285
        ret |= decode_scaling_list(gb, scaling_matrix4[1], 16, default_scaling4[0], scaling_matrix4[0]); // Intra, Cr
296
285
        ret |= decode_scaling_list(gb, scaling_matrix4[2], 16, default_scaling4[0], scaling_matrix4[1]); // Intra, Cb
297
285
        ret |= decode_scaling_list(gb, scaling_matrix4[3], 16, default_scaling4[1], fallback[1]);        // Inter, Y
298
285
        ret |= decode_scaling_list(gb, scaling_matrix4[4], 16, default_scaling4[1], scaling_matrix4[3]); // Inter, Cr
299
285
        ret |= decode_scaling_list(gb, scaling_matrix4[5], 16, default_scaling4[1], scaling_matrix4[4]); // Inter, Cb
300

285
        if (is_sps || pps->transform_8x8_mode) {
301
285
            ret |= decode_scaling_list(gb, scaling_matrix8[0], 64, default_scaling8[0], fallback[2]); // Intra, Y
302
285
            ret |= decode_scaling_list(gb, scaling_matrix8[3], 64, default_scaling8[1], fallback[3]); // Inter, Y
303
285
            if (sps->chroma_format_idc == 3) {
304
                ret |= decode_scaling_list(gb, scaling_matrix8[1], 64, default_scaling8[0], scaling_matrix8[0]); // Intra, Cr
305
                ret |= decode_scaling_list(gb, scaling_matrix8[4], 64, default_scaling8[1], scaling_matrix8[3]); // Inter, Cr
306
                ret |= decode_scaling_list(gb, scaling_matrix8[2], 64, default_scaling8[0], scaling_matrix8[1]); // Intra, Cb
307
                ret |= decode_scaling_list(gb, scaling_matrix8[5], 64, default_scaling8[1], scaling_matrix8[4]); // Inter, Cb
308
            }
309
        }
310
285
        if (!ret)
311
285
            ret = is_sps;
312
    }
313
314
1284
    return ret;
315
}
316
317
828
void ff_h264_ps_uninit(H264ParamSets *ps)
318
{
319
    int i;
320
321
27324
    for (i = 0; i < MAX_SPS_COUNT; i++)
322
26496
        av_buffer_unref(&ps->sps_list[i]);
323
324
212796
    for (i = 0; i < MAX_PPS_COUNT; i++)
325
211968
        av_buffer_unref(&ps->pps_list[i]);
326
327
828
    av_buffer_unref(&ps->sps_ref);
328
828
    av_buffer_unref(&ps->pps_ref);
329
330
828
    ps->pps = NULL;
331
828
    ps->sps = NULL;
332
828
}
333
334
2109
int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
335
                                     H264ParamSets *ps, int ignore_truncation)
336
{
337
    AVBufferRef *sps_buf;
338
2109
    int profile_idc, level_idc, constraint_set_flags = 0;
339
    unsigned int sps_id;
340
    int i, log2_max_frame_num_minus4;
341
    SPS *sps;
342
    int ret;
343
344
2109
    sps_buf = av_buffer_allocz(sizeof(*sps));
345
2109
    if (!sps_buf)
346
        return AVERROR(ENOMEM);
347
2109
    sps = (SPS*)sps_buf->data;
348
349
2109
    sps->data_size = gb->buffer_end - gb->buffer;
350
2109
    if (sps->data_size > sizeof(sps->data)) {
351
        av_log(avctx, AV_LOG_DEBUG, "Truncating likely oversized SPS\n");
352
        sps->data_size = sizeof(sps->data);
353
    }
354
2109
    memcpy(sps->data, gb->buffer, sps->data_size);
355
356
2109
    profile_idc           = get_bits(gb, 8);
357
2109
    constraint_set_flags |= get_bits1(gb) << 0;   // constraint_set0_flag
358
2109
    constraint_set_flags |= get_bits1(gb) << 1;   // constraint_set1_flag
359
2109
    constraint_set_flags |= get_bits1(gb) << 2;   // constraint_set2_flag
360
2109
    constraint_set_flags |= get_bits1(gb) << 3;   // constraint_set3_flag
361
2109
    constraint_set_flags |= get_bits1(gb) << 4;   // constraint_set4_flag
362
2109
    constraint_set_flags |= get_bits1(gb) << 5;   // constraint_set5_flag
363
2109
    skip_bits(gb, 2);                             // reserved_zero_2bits
364
2109
    level_idc = get_bits(gb, 8);
365
2109
    sps_id    = get_ue_golomb_31(gb);
366
367
2109
    if (sps_id >= MAX_SPS_COUNT) {
368
        av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", sps_id);
369
        goto fail;
370
    }
371
372
2109
    sps->sps_id               = sps_id;
373
2109
    sps->time_offset_length   = 24;
374
2109
    sps->profile_idc          = profile_idc;
375
2109
    sps->constraint_set_flags = constraint_set_flags;
376
2109
    sps->level_idc            = level_idc;
377
2109
    sps->full_range           = -1;
378
379
2109
    memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
380
2109
    memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
381
2109
    sps->scaling_matrix_present = 0;
382
2109
    sps->colorspace = 2; //AVCOL_SPC_UNSPECIFIED
383
384
2109
    if (sps->profile_idc == 100 ||  // High profile
385
1577
        sps->profile_idc == 110 ||  // High10 profile
386
1533
        sps->profile_idc == 122 ||  // High422 profile
387
1475
        sps->profile_idc == 244 ||  // High444 Predictive profile
388
1442
        sps->profile_idc ==  44 ||  // Cavlc444 profile
389
1442
        sps->profile_idc ==  83 ||  // Scalable Constrained High profile (SVC)
390
1442
        sps->profile_idc ==  86 ||  // Scalable High Intra profile (SVC)
391
1442
        sps->profile_idc == 118 ||  // Stereo High profile (MVC)
392
1442
        sps->profile_idc == 128 ||  // Multiview High profile (MVC)
393
1442
        sps->profile_idc == 138 ||  // Multiview Depth High profile (MVCD)
394
1442
        sps->profile_idc == 144) {  // old High444 profile
395
667
        sps->chroma_format_idc = get_ue_golomb_31(gb);
396
667
        if (sps->chroma_format_idc > 3U) {
397
            avpriv_request_sample(avctx, "chroma_format_idc %u",
398
                                  sps->chroma_format_idc);
399
            goto fail;
400
667
        } else if (sps->chroma_format_idc == 3) {
401
29
            sps->residual_color_transform_flag = get_bits1(gb);
402
29
            if (sps->residual_color_transform_flag) {
403
                av_log(avctx, AV_LOG_ERROR, "separate color planes are not supported\n");
404
                goto fail;
405
            }
406
        }
407
667
        sps->bit_depth_luma   = get_ue_golomb(gb) + 8;
408
667
        sps->bit_depth_chroma = get_ue_golomb(gb) + 8;
409
667
        if (sps->bit_depth_chroma != sps->bit_depth_luma) {
410
            avpriv_request_sample(avctx,
411
                                  "Different chroma and luma bit depth");
412
            goto fail;
413
        }
414

667
        if (sps->bit_depth_luma   < 8 || sps->bit_depth_luma   > 14 ||
415

667
            sps->bit_depth_chroma < 8 || sps->bit_depth_chroma > 14) {
416
            av_log(avctx, AV_LOG_ERROR, "illegal bit depth value (%d, %d)\n",
417
                   sps->bit_depth_luma, sps->bit_depth_chroma);
418
            goto fail;
419
        }
420
667
        sps->transform_bypass = get_bits1(gb);
421
667
        ret = decode_scaling_matrices(gb, sps, NULL, 1,
422
667
                                      sps->scaling_matrix4, sps->scaling_matrix8);
423
667
        if (ret < 0)
424
            goto fail;
425
667
        sps->scaling_matrix_present |= ret;
426
    } else {
427
1442
        sps->chroma_format_idc = 1;
428
1442
        sps->bit_depth_luma    = 8;
429
1442
        sps->bit_depth_chroma  = 8;
430
    }
431
432
2109
    log2_max_frame_num_minus4 = get_ue_golomb(gb);
433

2109
    if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 ||
434
        log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) {
435
        av_log(avctx, AV_LOG_ERROR,
436
               "log2_max_frame_num_minus4 out of range (0-12): %d\n",
437
               log2_max_frame_num_minus4);
438
        goto fail;
439
    }
440
2109
    sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4;
441
442
2109
    sps->poc_type = get_ue_golomb_31(gb);
443
444
2109
    if (sps->poc_type == 0) { // FIXME #define
445
1016
        unsigned t = get_ue_golomb(gb);
446
1016
        if (t>12) {
447
            av_log(avctx, AV_LOG_ERROR, "log2_max_poc_lsb (%d) is out of range\n", t);
448
            goto fail;
449
        }
450
1016
        sps->log2_max_poc_lsb = t + 4;
451
1093
    } else if (sps->poc_type == 1) { // FIXME #define
452
76
        sps->delta_pic_order_always_zero_flag = get_bits1(gb);
453
76
        sps->offset_for_non_ref_pic           = get_se_golomb_long(gb);
454
76
        sps->offset_for_top_to_bottom_field   = get_se_golomb_long(gb);
455
456
76
        if (   sps->offset_for_non_ref_pic         == INT32_MIN
457
76
            || sps->offset_for_top_to_bottom_field == INT32_MIN
458
        ) {
459
            av_log(avctx, AV_LOG_ERROR,
460
                   "offset_for_non_ref_pic or offset_for_top_to_bottom_field is out of range\n");
461
            goto fail;
462
        }
463
464
76
        sps->poc_cycle_length                 = get_ue_golomb(gb);
465
466
76
        if ((unsigned)sps->poc_cycle_length >=
467
            FF_ARRAY_ELEMS(sps->offset_for_ref_frame)) {
468
            av_log(avctx, AV_LOG_ERROR,
469
                   "poc_cycle_length overflow %d\n", sps->poc_cycle_length);
470
            goto fail;
471
        }
472
473
176
        for (i = 0; i < sps->poc_cycle_length; i++) {
474
100
            sps->offset_for_ref_frame[i] = get_se_golomb_long(gb);
475
100
            if (sps->offset_for_ref_frame[i] == INT32_MIN) {
476
                av_log(avctx, AV_LOG_ERROR,
477
                       "offset_for_ref_frame is out of range\n");
478
                goto fail;
479
            }
480
        }
481
1017
    } else if (sps->poc_type != 2) {
482
        av_log(avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
483
        goto fail;
484
    }
485
486
2109
    sps->ref_frame_count = get_ue_golomb_31(gb);
487
2109
    if (avctx->codec_tag == MKTAG('S', 'M', 'V', '2'))
488
        sps->ref_frame_count = FFMAX(2, sps->ref_frame_count);
489
2109
    if (sps->ref_frame_count > MAX_DELAYED_PIC_COUNT) {
490
        av_log(avctx, AV_LOG_ERROR,
491
               "too many reference frames %d\n", sps->ref_frame_count);
492
        goto fail;
493
    }
494
2109
    sps->gaps_in_frame_num_allowed_flag = get_bits1(gb);
495
2109
    sps->mb_width                       = get_ue_golomb(gb) + 1;
496
2109
    sps->mb_height                      = get_ue_golomb(gb) + 1;
497
498
2109
    sps->frame_mbs_only_flag = get_bits1(gb);
499
500
2109
    if (sps->mb_height >= INT_MAX / 2U) {
501
        av_log(avctx, AV_LOG_ERROR, "height overflow\n");
502
        goto fail;
503
    }
504
2109
    sps->mb_height *= 2 - sps->frame_mbs_only_flag;
505
506
2109
    if (!sps->frame_mbs_only_flag)
507
476
        sps->mb_aff = get_bits1(gb);
508
    else
509
1633
        sps->mb_aff = 0;
510
511
2109
    if ((unsigned)sps->mb_width  >= INT_MAX / 16 ||
512

4218
        (unsigned)sps->mb_height >= INT_MAX / 16 ||
513
2109
        av_image_check_size(16 * sps->mb_width,
514
2109
                            16 * sps->mb_height, 0, avctx)) {
515
        av_log(avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
516
        goto fail;
517
    }
518
519
2109
    sps->direct_8x8_inference_flag = get_bits1(gb);
520
521
#ifndef ALLOW_INTERLACE
522
    if (sps->mb_aff)
523
        av_log(avctx, AV_LOG_ERROR,
524
               "MBAFF support not included; enable it at compile-time.\n");
525
#endif
526
2109
    sps->crop = get_bits1(gb);
527
2109
    if (sps->crop) {
528
206
        unsigned int crop_left   = get_ue_golomb(gb);
529
206
        unsigned int crop_right  = get_ue_golomb(gb);
530
206
        unsigned int crop_top    = get_ue_golomb(gb);
531
206
        unsigned int crop_bottom = get_ue_golomb(gb);
532
206
        int width  = 16 * sps->mb_width;
533
206
        int height = 16 * sps->mb_height;
534
535
206
        if (avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {
536
            av_log(avctx, AV_LOG_DEBUG, "discarding sps cropping, original "
537
                                           "values are l:%d r:%d t:%d b:%d\n",
538
                   crop_left, crop_right, crop_top, crop_bottom);
539
540
            sps->crop_left   =
541
            sps->crop_right  =
542
            sps->crop_top    =
543
            sps->crop_bottom = 0;
544
        } else {
545
206
            int vsub   = (sps->chroma_format_idc == 1) ? 1 : 0;
546
412
            int hsub   = (sps->chroma_format_idc == 1 ||
547

206
                          sps->chroma_format_idc == 2) ? 1 : 0;
548
206
            int step_x = 1 << hsub;
549
206
            int step_y = (2 - sps->frame_mbs_only_flag) << vsub;
550
551
206
            if (crop_left  > (unsigned)INT_MAX / 4 / step_x ||
552
206
                crop_right > (unsigned)INT_MAX / 4 / step_x ||
553
206
                crop_top   > (unsigned)INT_MAX / 4 / step_y ||
554
206
                crop_bottom> (unsigned)INT_MAX / 4 / step_y ||
555
206
                (crop_left + crop_right ) * step_x >= width ||
556
206
                (crop_top  + crop_bottom) * step_y >= height
557
            ) {
558
                av_log(avctx, AV_LOG_ERROR, "crop values invalid %d %d %d %d / %d %d\n", crop_left, crop_right, crop_top, crop_bottom, width, height);
559
                goto fail;
560
            }
561
562
206
            sps->crop_left   = crop_left   * step_x;
563
206
            sps->crop_right  = crop_right  * step_x;
564
206
            sps->crop_top    = crop_top    * step_y;
565
206
            sps->crop_bottom = crop_bottom * step_y;
566
        }
567
    } else {
568
1903
        sps->crop_left   =
569
1903
        sps->crop_right  =
570
1903
        sps->crop_top    =
571
1903
        sps->crop_bottom =
572
1903
        sps->crop        = 0;
573
    }
574
575
2109
    sps->vui_parameters_present_flag = get_bits1(gb);
576
2109
    if (sps->vui_parameters_present_flag) {
577
549
        int ret = decode_vui_parameters(gb, avctx, sps);
578
549
        if (ret < 0)
579
            goto fail;
580
    }
581
582
2109
    if (get_bits_left(gb) < 0) {
583
8
        av_log_once(avctx, ignore_truncation ? AV_LOG_WARNING : AV_LOG_ERROR, AV_LOG_DEBUG,
584
4
                    &ps->overread_warning_printed[sps->vui_parameters_present_flag],
585
4
               "Overread %s by %d bits\n", sps->vui_parameters_present_flag ? "VUI" : "SPS", -get_bits_left(gb));
586
4
        if (!ignore_truncation)
587
4
            goto fail;
588
    }
589
590
    /* if the maximum delay is not stored in the SPS, derive it based on the
591
     * level */
592
2105
    if (!sps->bitstream_restriction_flag &&
593

1653
        (sps->ref_frame_count || avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT)) {
594
1594
        sps->num_reorder_frames = MAX_DELAYED_PIC_COUNT - 1;
595
8641
        for (i = 0; i < FF_ARRAY_ELEMS(level_max_dpb_mbs); i++) {
596
8641
            if (level_max_dpb_mbs[i][0] == sps->level_idc) {
597
1594
                sps->num_reorder_frames = FFMIN(level_max_dpb_mbs[i][1] / (sps->mb_width * sps->mb_height),
598
                                                sps->num_reorder_frames);
599
1594
                break;
600
            }
601
        }
602
    }
603
604
2105
    if (!sps->sar.den)
605
1912
        sps->sar.den = 1;
606
607
2105
    if (avctx->debug & FF_DEBUG_PICT_INFO) {
608
        static const char csp[4][5] = { "Gray", "420", "422", "444" };
609
        av_log(avctx, AV_LOG_DEBUG,
610
               "sps:%u profile:%d/%d poc:%d ref:%d %dx%d %s %s crop:%u/%u/%u/%u %s %s %"PRId32"/%"PRId32" b%d reo:%d\n",
611
               sps_id, sps->profile_idc, sps->level_idc,
612
               sps->poc_type,
613
               sps->ref_frame_count,
614
               sps->mb_width, sps->mb_height,
615
               sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
616
               sps->direct_8x8_inference_flag ? "8B8" : "",
617
               sps->crop_left, sps->crop_right,
618
               sps->crop_top, sps->crop_bottom,
619
               sps->vui_parameters_present_flag ? "VUI" : "",
620
               csp[sps->chroma_format_idc],
621
               sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
622
               sps->timing_info_present_flag ? sps->time_scale : 0,
623
               sps->bit_depth_luma,
624
               sps->bitstream_restriction_flag ? sps->num_reorder_frames : -1
625
               );
626
    }
627
628
    /* check if this is a repeat of an already parsed SPS, then keep the
629
     * original one.
630
     * otherwise drop all PPSes that depend on it */
631
2105
    if (ps->sps_list[sps_id] &&
632
1330
        !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {
633
1302
        av_buffer_unref(&sps_buf);
634
    } else {
635
803
        remove_sps(ps, sps_id);
636
803
        ps->sps_list[sps_id] = sps_buf;
637
    }
638
639
2105
    return 0;
640
641
4
fail:
642
4
    av_buffer_unref(&sps_buf);
643
4
    return AVERROR_INVALIDDATA;
644
}
645
646
605
static void init_dequant8_coeff_table(PPS *pps, const SPS *sps)
647
{
648
    int i, j, q, x;
649
605
    const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
650
651
4235
    for (i = 0; i < 6; i++) {
652
3630
        pps->dequant8_coeff[i] = pps->dequant8_buffer[i];
653
5484
        for (j = 0; j < i; j++)
654
4352
            if (!memcmp(pps->scaling_matrix8[j], pps->scaling_matrix8[i],
655
                        64 * sizeof(uint8_t))) {
656
2498
                pps->dequant8_coeff[i] = pps->dequant8_buffer[j];
657
2498
                break;
658
            }
659
3630
        if (j < i)
660
2498
            continue;
661
662
61274
        for (q = 0; q < max_qp + 1; q++) {
663
60142
            int shift = ff_h264_quant_div6[q];
664
60142
            int idx   = ff_h264_quant_rem6[q];
665
3909230
            for (x = 0; x < 64; x++)
666
3849088
                pps->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] =
667
3849088
                    ((uint32_t)ff_h264_dequant8_coeff_init[idx][ff_h264_dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] *
668
3849088
                     pps->scaling_matrix8[i][x]) << shift;
669
        }
670
    }
671
605
}
672
673
13814
static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
674
{
675
    int i, j, q, x;
676
13814
    const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
677
96698
    for (i = 0; i < 6; i++) {
678
82884
        pps->dequant4_coeff[i] = pps->dequant4_buffer[i];
679
87043
        for (j = 0; j < i; j++)
680
72412
            if (!memcmp(pps->scaling_matrix4[j], pps->scaling_matrix4[i],
681
                        16 * sizeof(uint8_t))) {
682
68253
                pps->dequant4_coeff[i] = pps->dequant4_buffer[j];
683
68253
                break;
684
            }
685
82884
        if (j < i)
686
68253
            continue;
687
688
777087
        for (q = 0; q < max_qp + 1; q++) {
689
762456
            int shift = ff_h264_quant_div6[q] + 2;
690
762456
            int idx   = ff_h264_quant_rem6[q];
691
12961752
            for (x = 0; x < 16; x++)
692
12199296
                pps->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] =
693
12199296
                    ((uint32_t)ff_h264_dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] *
694
12199296
                     pps->scaling_matrix4[i][x]) << shift;
695
        }
696
    }
697
13814
}
698
699
13814
static void init_dequant_tables(PPS *pps, const SPS *sps)
700
{
701
    int i, x;
702
13814
    init_dequant4_coeff_table(pps, sps);
703
13814
    memset(pps->dequant8_coeff, 0, sizeof(pps->dequant8_coeff));
704
705
13814
    if (pps->transform_8x8_mode)
706
605
        init_dequant8_coeff_table(pps, sps);
707
13814
    if (sps->transform_bypass) {
708
133
        for (i = 0; i < 6; i++)
709
1938
            for (x = 0; x < 16; x++)
710
1824
                pps->dequant4_coeff[i][0][x] = 1 << 6;
711
19
        if (pps->transform_8x8_mode)
712
126
            for (i = 0; i < 6; i++)
713
7020
                for (x = 0; x < 64; x++)
714
6912
                    pps->dequant8_coeff[i][0][x] = 1 << 6;
715
    }
716
13814
}
717
718
27628
static void build_qp_table(PPS *pps, int t, int index, const int depth)
719
{
720
    int i;
721
27628
    const int max_qp = 51 + 6 * (depth - 8);
722
1467164
    for (i = 0; i < max_qp + 1; i++)
723
1439536
        pps->chroma_qp_table[t][i] =
724
1439536
            ff_h264_chroma_qp[depth - 8][av_clip(i + index, 0, max_qp)];
725
27628
}
726
727
617
static int more_rbsp_data_in_pps(const SPS *sps, void *logctx)
728
{
729
617
    int profile_idc = sps->profile_idc;
730
731

617
    if ((profile_idc == 66 || profile_idc == 77 ||
732
12
         profile_idc == 88) && (sps->constraint_set_flags & 7)) {
733
        av_log(logctx, AV_LOG_VERBOSE,
734
               "Current profile doesn't provide more RBSP data in PPS, skipping\n");
735
        return 0;
736
    }
737
738
617
    return 1;
739
}
740
741
13828
int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
742
                                         H264ParamSets *ps, int bit_length)
743
{
744
    AVBufferRef *pps_buf;
745
    const SPS *sps;
746
13828
    unsigned int pps_id = get_ue_golomb(gb);
747
    PPS *pps;
748
    int qp_bd_offset;
749
    int bits_left;
750
    int ret;
751
752
13828
    if (pps_id >= MAX_PPS_COUNT) {
753
        av_log(avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
754
        return AVERROR_INVALIDDATA;
755
    }
756
757
13828
    pps_buf = av_buffer_allocz(sizeof(*pps));
758
13828
    if (!pps_buf)
759
        return AVERROR(ENOMEM);
760
13828
    pps = (PPS*)pps_buf->data;
761
762
13828
    pps->data_size = gb->buffer_end - gb->buffer;
763
13828
    if (pps->data_size > sizeof(pps->data)) {
764
        av_log(avctx, AV_LOG_DEBUG, "Truncating likely oversized PPS "
765
               "(%"SIZE_SPECIFIER" > %"SIZE_SPECIFIER")\n",
766
               pps->data_size, sizeof(pps->data));
767
        pps->data_size = sizeof(pps->data);
768
    }
769
13828
    memcpy(pps->data, gb->buffer, pps->data_size);
770
771
13828
    pps->sps_id = get_ue_golomb_31(gb);
772
13828
    if ((unsigned)pps->sps_id >= MAX_SPS_COUNT ||
773
13828
        !ps->sps_list[pps->sps_id]) {
774
        av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", pps->sps_id);
775
        ret = AVERROR_INVALIDDATA;
776
        goto fail;
777
    }
778
13828
    sps = (const SPS*)ps->sps_list[pps->sps_id]->data;
779
13828
    if (sps->bit_depth_luma > 14) {
780
        av_log(avctx, AV_LOG_ERROR,
781
               "Invalid luma bit depth=%d\n",
782
               sps->bit_depth_luma);
783
        ret = AVERROR_INVALIDDATA;
784
        goto fail;
785

13828
    } else if (sps->bit_depth_luma == 11 || sps->bit_depth_luma == 13) {
786
        avpriv_report_missing_feature(avctx,
787
               "Unimplemented luma bit depth=%d",
788
               sps->bit_depth_luma);
789
        ret = AVERROR_PATCHWELCOME;
790
        goto fail;
791
    }
792
793
13828
    pps->cabac             = get_bits1(gb);
794
13828
    pps->pic_order_present = get_bits1(gb);
795
13828
    pps->slice_group_count = get_ue_golomb(gb) + 1;
796
13828
    if (pps->slice_group_count > 1) {
797
14
        pps->mb_slice_group_map_type = get_ue_golomb(gb);
798
14
        avpriv_report_missing_feature(avctx, "FMO");
799
14
        ret = AVERROR_PATCHWELCOME;
800
14
        goto fail;
801
    }
802
13814
    pps->ref_count[0] = get_ue_golomb(gb) + 1;
803
13814
    pps->ref_count[1] = get_ue_golomb(gb) + 1;
804

13814
    if (pps->ref_count[0] - 1 > 32 - 1 || pps->ref_count[1] - 1 > 32 - 1) {
805
        av_log(avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
806
        ret = AVERROR_INVALIDDATA;
807
        goto fail;
808
    }
809
810
13814
    qp_bd_offset = 6 * (sps->bit_depth_luma - 8);
811
812
13814
    pps->weighted_pred                        = get_bits1(gb);
813
13814
    pps->weighted_bipred_idc                  = get_bits(gb, 2);
814
13814
    pps->init_qp                              = get_se_golomb(gb) + 26U + qp_bd_offset;
815
13814
    pps->init_qs                              = get_se_golomb(gb) + 26U + qp_bd_offset;
816
13814
    pps->chroma_qp_index_offset[0]            = get_se_golomb(gb);
817

13814
    if (pps->chroma_qp_index_offset[0] < -12 || pps->chroma_qp_index_offset[0] > 12) {
818
        ret = AVERROR_INVALIDDATA;
819
        goto fail;
820
    }
821
822
13814
    pps->deblocking_filter_parameters_present = get_bits1(gb);
823
13814
    pps->constrained_intra_pred               = get_bits1(gb);
824
13814
    pps->redundant_pic_cnt_present            = get_bits1(gb);
825
826
13814
    pps->transform_8x8_mode = 0;
827
13814
    memcpy(pps->scaling_matrix4, sps->scaling_matrix4,
828
           sizeof(pps->scaling_matrix4));
829
13814
    memcpy(pps->scaling_matrix8, sps->scaling_matrix8,
830
           sizeof(pps->scaling_matrix8));
831
832
13814
    bits_left = bit_length - get_bits_count(gb);
833

13814
    if (bits_left > 0 && more_rbsp_data_in_pps(sps, avctx)) {
834
617
        pps->transform_8x8_mode = get_bits1(gb);
835
617
        ret = decode_scaling_matrices(gb, sps, pps, 0,
836
617
                                pps->scaling_matrix4, pps->scaling_matrix8);
837
617
        if (ret < 0)
838
            goto fail;
839
        // second_chroma_qp_index_offset
840
617
        pps->chroma_qp_index_offset[1] = get_se_golomb(gb);
841

617
        if (pps->chroma_qp_index_offset[1] < -12 || pps->chroma_qp_index_offset[1] > 12) {
842
            ret = AVERROR_INVALIDDATA;
843
            goto fail;
844
        }
845
    } else {
846
13197
        pps->chroma_qp_index_offset[1] = pps->chroma_qp_index_offset[0];
847
    }
848
849
13814
    build_qp_table(pps, 0, pps->chroma_qp_index_offset[0],
850
                   sps->bit_depth_luma);
851
13814
    build_qp_table(pps, 1, pps->chroma_qp_index_offset[1],
852
                   sps->bit_depth_luma);
853
854
13814
    init_dequant_tables(pps, sps);
855
856
13814
    if (pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
857
75
        pps->chroma_qp_diff = 1;
858
859
13814
    if (avctx->debug & FF_DEBUG_PICT_INFO) {
860
        av_log(avctx, AV_LOG_DEBUG,
861
               "pps:%u sps:%u %s slice_groups:%d ref:%u/%u %s qp:%d/%d/%d/%d %s %s %s %s\n",
862
               pps_id, pps->sps_id,
863
               pps->cabac ? "CABAC" : "CAVLC",
864
               pps->slice_group_count,
865
               pps->ref_count[0], pps->ref_count[1],
866
               pps->weighted_pred ? "weighted" : "",
867
               pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
868
               pps->deblocking_filter_parameters_present ? "LPAR" : "",
869
               pps->constrained_intra_pred ? "CONSTR" : "",
870
               pps->redundant_pic_cnt_present ? "REDU" : "",
871
               pps->transform_8x8_mode ? "8x8DCT" : "");
872
    }
873
874
13814
    remove_pps(ps, pps_id);
875
13814
    ps->pps_list[pps_id] = pps_buf;
876
877
13814
    return 0;
878
879
14
fail:
880
14
    av_buffer_unref(&pps_buf);
881
14
    return ret;
882
}