GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/h264_ps.c Lines: 406 504 80.6 %
Date: 2019-11-22 03:34:36 Branches: 239 344 69.5 %

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
13809
static void remove_pps(H264ParamSets *s, int id)
89
{
90
13809
    av_buffer_unref(&s->pps_list[id]);
91
13809
}
92
93
800
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
800
    av_buffer_unref(&s->sps_list[id]);
105
800
}
106
107
112
static inline int decode_hrd_parameters(GetBitContext *gb, AVCodecContext *avctx,
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(avctx, 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
534
static inline int decode_vui_parameters(GetBitContext *gb, AVCodecContext *avctx,
134
                                        SPS *sps)
135
{
136
    int aspect_ratio_info_present_flag;
137
    unsigned int aspect_ratio_idc;
138
139
534
    aspect_ratio_info_present_flag = get_bits1(gb);
140
141
534
    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(avctx, AV_LOG_ERROR, "illegal aspect ratio\n");
150
            return AVERROR_INVALIDDATA;
151
        }
152
    } else {
153
339
        sps->sar.num =
154
339
        sps->sar.den = 0;
155
    }
156
157
534
    if (get_bits1(gb))      /* overscan_info_present_flag */
158
42
        get_bits1(gb);      /* overscan_appropriate_flag */
159
160
534
    sps->video_signal_type_present_flag = get_bits1(gb);
161
534
    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
534
    if (get_bits1(gb)) {
183
        /* chroma_sample_location_type_top_field */
184
61
        avctx->chroma_sample_location = get_ue_golomb(gb) + 1;
185
61
        get_ue_golomb(gb);  /* chroma_sample_location_type_bottom_field */
186
    }
187
188

534
    if (show_bits1(gb) && get_bits_left(gb) < 10) {
189
        av_log(avctx, AV_LOG_WARNING, "Truncated VUI\n");
190
        return 0;
191
    }
192
193
534
    sps->timing_info_present_flag = get_bits1(gb);
194
534
    if (sps->timing_info_present_flag) {
195
473
        unsigned num_units_in_tick = get_bits_long(gb, 32);
196
473
        unsigned time_scale        = get_bits_long(gb, 32);
197

473
        if (!num_units_in_tick || !time_scale) {
198
            av_log(avctx, AV_LOG_ERROR,
199
                   "time_scale/num_units_in_tick invalid or unsupported (%u/%u)\n",
200
                   time_scale, num_units_in_tick);
201
            sps->timing_info_present_flag = 0;
202
        } else {
203
473
            sps->num_units_in_tick = num_units_in_tick;
204
473
            sps->time_scale = time_scale;
205
        }
206
473
        sps->fixed_frame_rate_flag = get_bits1(gb);
207
    }
208
209
534
    sps->nal_hrd_parameters_present_flag = get_bits1(gb);
210
534
    if (sps->nal_hrd_parameters_present_flag)
211
81
        if (decode_hrd_parameters(gb, avctx, sps) < 0)
212
            return AVERROR_INVALIDDATA;
213
534
    sps->vcl_hrd_parameters_present_flag = get_bits1(gb);
214
534
    if (sps->vcl_hrd_parameters_present_flag)
215
31
        if (decode_hrd_parameters(gb, avctx, sps) < 0)
216
            return AVERROR_INVALIDDATA;
217
534
    if (sps->nal_hrd_parameters_present_flag ||
218
453
        sps->vcl_hrd_parameters_present_flag)
219
81
        get_bits1(gb);     /* low_delay_hrd_flag */
220
534
    sps->pic_struct_present_flag = get_bits1(gb);
221
534
    if (!get_bits_left(gb))
222
        return 0;
223
534
    sps->bitstream_restriction_flag = get_bits1(gb);
224
534
    if (sps->bitstream_restriction_flag) {
225
439
        get_bits1(gb);     /* motion_vectors_over_pic_boundaries_flag */
226
439
        get_ue_golomb(gb); /* max_bytes_per_pic_denom */
227
439
        get_ue_golomb(gb); /* max_bits_per_mb_denom */
228
439
        get_ue_golomb(gb); /* log2_max_mv_length_horizontal */
229
439
        get_ue_golomb(gb); /* log2_max_mv_length_vertical */
230
439
        sps->num_reorder_frames = get_ue_golomb(gb);
231
439
        get_ue_golomb(gb); /*max_dec_frame_buffering*/
232
233
439
        if (get_bits_left(gb) < 0) {
234
2
            sps->num_reorder_frames         = 0;
235
2
            sps->bitstream_restriction_flag = 0;
236
        }
237
238
439
        if (sps->num_reorder_frames > 16U
239
            /* max_dec_frame_buffering || max_dec_frame_buffering > 16 */) {
240
            av_log(avctx, AV_LOG_ERROR,
241
                   "Clipping illegal num_reorder_frames %d\n",
242
                   sps->num_reorder_frames);
243
            sps->num_reorder_frames = 16;
244
            return AVERROR_INVALIDDATA;
245
        }
246
    }
247
248
534
    return 0;
249
}
250
251
2280
static int decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size,
252
                                const uint8_t *jvt_list,
253
                                const uint8_t *fallback_list)
254
{
255
2280
    int i, last = 8, next = 8;
256
2280
    const uint8_t *scan = size == 16 ? ff_zigzag_scan : ff_zigzag_direct;
257
2280
    if (!get_bits1(gb)) /* matrix not written, we use the predicted one */
258
1140
        memcpy(factors, fallback_list, size * sizeof(uint8_t));
259
    else
260
30580
        for (i = 0; i < size; i++) {
261
29544
            if (next) {
262
27536
                int v = get_se_golomb(gb);
263

27536
                if (v < -128 || v > 127) {
264
                    av_log(NULL, AV_LOG_ERROR, "delta scale %d is invalid\n", v);
265
                    return AVERROR_INVALIDDATA;
266
                }
267
27536
                next = (last + v) & 0xff;
268
            }
269

29544
            if (!i && !next) { /* matrix not written, we use the preset one */
270
104
                memcpy(factors, jvt_list, size * sizeof(uint8_t));
271
104
                break;
272
            }
273
29440
            last = factors[scan[i]] = next ? next : last;
274
        }
275
2280
    return 0;
276
}
277
278
/* returns non zero if the provided SPS scaling matrix has been filled */
279
1266
static int decode_scaling_matrices(GetBitContext *gb, const SPS *sps,
280
                                    const PPS *pps, int is_sps,
281
                                    uint8_t(*scaling_matrix4)[16],
282
                                    uint8_t(*scaling_matrix8)[64])
283
{
284

1266
    int fallback_sps = !is_sps && sps->scaling_matrix_present;
285
5064
    const uint8_t *fallback[4] = {
286
1266
        fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
287
1266
        fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
288
1266
        fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
289
1266
        fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1]
290
    };
291
1266
    int ret = 0;
292
1266
    if (get_bits1(gb)) {
293
285
        ret |= decode_scaling_list(gb, scaling_matrix4[0], 16, default_scaling4[0], fallback[0]);        // Intra, Y
294
285
        ret |= decode_scaling_list(gb, scaling_matrix4[1], 16, default_scaling4[0], scaling_matrix4[0]); // Intra, Cr
295
285
        ret |= decode_scaling_list(gb, scaling_matrix4[2], 16, default_scaling4[0], scaling_matrix4[1]); // Intra, Cb
296
285
        ret |= decode_scaling_list(gb, scaling_matrix4[3], 16, default_scaling4[1], fallback[1]);        // Inter, Y
297
285
        ret |= decode_scaling_list(gb, scaling_matrix4[4], 16, default_scaling4[1], scaling_matrix4[3]); // Inter, Cr
298
285
        ret |= decode_scaling_list(gb, scaling_matrix4[5], 16, default_scaling4[1], scaling_matrix4[4]); // Inter, Cb
299

285
        if (is_sps || pps->transform_8x8_mode) {
300
285
            ret |= decode_scaling_list(gb, scaling_matrix8[0], 64, default_scaling8[0], fallback[2]); // Intra, Y
301
285
            ret |= decode_scaling_list(gb, scaling_matrix8[3], 64, default_scaling8[1], fallback[3]); // Inter, Y
302
285
            if (sps->chroma_format_idc == 3) {
303
                ret |= decode_scaling_list(gb, scaling_matrix8[1], 64, default_scaling8[0], scaling_matrix8[0]); // Intra, Cr
304
                ret |= decode_scaling_list(gb, scaling_matrix8[4], 64, default_scaling8[1], scaling_matrix8[3]); // Inter, Cr
305
                ret |= decode_scaling_list(gb, scaling_matrix8[2], 64, default_scaling8[0], scaling_matrix8[1]); // Intra, Cb
306
                ret |= decode_scaling_list(gb, scaling_matrix8[5], 64, default_scaling8[1], scaling_matrix8[4]); // Inter, Cb
307
            }
308
        }
309
285
        if (!ret)
310
285
            ret = is_sps;
311
    }
312
313
1266
    return ret;
314
}
315
316
824
void ff_h264_ps_uninit(H264ParamSets *ps)
317
{
318
    int i;
319
320
27192
    for (i = 0; i < MAX_SPS_COUNT; i++)
321
26368
        av_buffer_unref(&ps->sps_list[i]);
322
323
211768
    for (i = 0; i < MAX_PPS_COUNT; i++)
324
210944
        av_buffer_unref(&ps->pps_list[i]);
325
326
824
    av_buffer_unref(&ps->sps_ref);
327
824
    av_buffer_unref(&ps->pps_ref);
328
329
824
    ps->pps = NULL;
330
824
    ps->sps = NULL;
331
824
}
332
333
2094
int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
334
                                     H264ParamSets *ps, int ignore_truncation)
335
{
336
    AVBufferRef *sps_buf;
337
2094
    int profile_idc, level_idc, constraint_set_flags = 0;
338
    unsigned int sps_id;
339
    int i, log2_max_frame_num_minus4;
340
    SPS *sps;
341
    int ret;
342
343
2094
    sps_buf = av_buffer_allocz(sizeof(*sps));
344
2094
    if (!sps_buf)
345
        return AVERROR(ENOMEM);
346
2094
    sps = (SPS*)sps_buf->data;
347
348
2094
    sps->data_size = gb->buffer_end - gb->buffer;
349
2094
    if (sps->data_size > sizeof(sps->data)) {
350
        av_log(avctx, AV_LOG_DEBUG, "Truncating likely oversized SPS\n");
351
        sps->data_size = sizeof(sps->data);
352
    }
353
2094
    memcpy(sps->data, gb->buffer, sps->data_size);
354
355
2094
    profile_idc           = get_bits(gb, 8);
356
2094
    constraint_set_flags |= get_bits1(gb) << 0;   // constraint_set0_flag
357
2094
    constraint_set_flags |= get_bits1(gb) << 1;   // constraint_set1_flag
358
2094
    constraint_set_flags |= get_bits1(gb) << 2;   // constraint_set2_flag
359
2094
    constraint_set_flags |= get_bits1(gb) << 3;   // constraint_set3_flag
360
2094
    constraint_set_flags |= get_bits1(gb) << 4;   // constraint_set4_flag
361
2094
    constraint_set_flags |= get_bits1(gb) << 5;   // constraint_set5_flag
362
2094
    skip_bits(gb, 2);                             // reserved_zero_2bits
363
2094
    level_idc = get_bits(gb, 8);
364
2094
    sps_id    = get_ue_golomb_31(gb);
365
366
2094
    if (sps_id >= MAX_SPS_COUNT) {
367
        av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", sps_id);
368
        goto fail;
369
    }
370
371
2094
    sps->sps_id               = sps_id;
372
2094
    sps->time_offset_length   = 24;
373
2094
    sps->profile_idc          = profile_idc;
374
2094
    sps->constraint_set_flags = constraint_set_flags;
375
2094
    sps->level_idc            = level_idc;
376
2094
    sps->full_range           = -1;
377
378
2094
    memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
379
2094
    memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
380
2094
    sps->scaling_matrix_present = 0;
381
2094
    sps->colorspace = 2; //AVCOL_SPC_UNSPECIFIED
382
383
2094
    if (sps->profile_idc == 100 ||  // High profile
384
1577
        sps->profile_idc == 110 ||  // High10 profile
385
1533
        sps->profile_idc == 122 ||  // High422 profile
386
1475
        sps->profile_idc == 244 ||  // High444 Predictive profile
387
1442
        sps->profile_idc ==  44 ||  // Cavlc444 profile
388
1442
        sps->profile_idc ==  83 ||  // Scalable Constrained High profile (SVC)
389
1442
        sps->profile_idc ==  86 ||  // Scalable High Intra profile (SVC)
390
1442
        sps->profile_idc == 118 ||  // Stereo High profile (MVC)
391
1442
        sps->profile_idc == 128 ||  // Multiview High profile (MVC)
392
1442
        sps->profile_idc == 138 ||  // Multiview Depth High profile (MVCD)
393
1442
        sps->profile_idc == 144) {  // old High444 profile
394
652
        sps->chroma_format_idc = get_ue_golomb_31(gb);
395
652
        if (sps->chroma_format_idc > 3U) {
396
            avpriv_request_sample(avctx, "chroma_format_idc %u",
397
                                  sps->chroma_format_idc);
398
            goto fail;
399
652
        } else if (sps->chroma_format_idc == 3) {
400
29
            sps->residual_color_transform_flag = get_bits1(gb);
401
29
            if (sps->residual_color_transform_flag) {
402
                av_log(avctx, AV_LOG_ERROR, "separate color planes are not supported\n");
403
                goto fail;
404
            }
405
        }
406
652
        sps->bit_depth_luma   = get_ue_golomb(gb) + 8;
407
652
        sps->bit_depth_chroma = get_ue_golomb(gb) + 8;
408
652
        if (sps->bit_depth_chroma != sps->bit_depth_luma) {
409
            avpriv_request_sample(avctx,
410
                                  "Different chroma and luma bit depth");
411
            goto fail;
412
        }
413

652
        if (sps->bit_depth_luma   < 8 || sps->bit_depth_luma   > 14 ||
414

652
            sps->bit_depth_chroma < 8 || sps->bit_depth_chroma > 14) {
415
            av_log(avctx, AV_LOG_ERROR, "illegal bit depth value (%d, %d)\n",
416
                   sps->bit_depth_luma, sps->bit_depth_chroma);
417
            goto fail;
418
        }
419
652
        sps->transform_bypass = get_bits1(gb);
420
652
        ret = decode_scaling_matrices(gb, sps, NULL, 1,
421
652
                                      sps->scaling_matrix4, sps->scaling_matrix8);
422
652
        if (ret < 0)
423
            goto fail;
424
652
        sps->scaling_matrix_present |= ret;
425
    } else {
426
1442
        sps->chroma_format_idc = 1;
427
1442
        sps->bit_depth_luma    = 8;
428
1442
        sps->bit_depth_chroma  = 8;
429
    }
430
431
2094
    log2_max_frame_num_minus4 = get_ue_golomb(gb);
432

2094
    if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 ||
433
        log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) {
434
        av_log(avctx, AV_LOG_ERROR,
435
               "log2_max_frame_num_minus4 out of range (0-12): %d\n",
436
               log2_max_frame_num_minus4);
437
        goto fail;
438
    }
439
2094
    sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4;
440
441
2094
    sps->poc_type = get_ue_golomb_31(gb);
442
443
2094
    if (sps->poc_type == 0) { // FIXME #define
444
1001
        unsigned t = get_ue_golomb(gb);
445
1001
        if (t>12) {
446
            av_log(avctx, AV_LOG_ERROR, "log2_max_poc_lsb (%d) is out of range\n", t);
447
            goto fail;
448
        }
449
1001
        sps->log2_max_poc_lsb = t + 4;
450
1093
    } else if (sps->poc_type == 1) { // FIXME #define
451
76
        sps->delta_pic_order_always_zero_flag = get_bits1(gb);
452
76
        sps->offset_for_non_ref_pic           = get_se_golomb_long(gb);
453
76
        sps->offset_for_top_to_bottom_field   = get_se_golomb_long(gb);
454
455
76
        if (   sps->offset_for_non_ref_pic         == INT32_MIN
456
76
            || sps->offset_for_top_to_bottom_field == INT32_MIN
457
        ) {
458
            av_log(avctx, AV_LOG_ERROR,
459
                   "offset_for_non_ref_pic or offset_for_top_to_bottom_field is out of range\n");
460
            goto fail;
461
        }
462
463
76
        sps->poc_cycle_length                 = get_ue_golomb(gb);
464
465
76
        if ((unsigned)sps->poc_cycle_length >=
466
            FF_ARRAY_ELEMS(sps->offset_for_ref_frame)) {
467
            av_log(avctx, AV_LOG_ERROR,
468
                   "poc_cycle_length overflow %d\n", sps->poc_cycle_length);
469
            goto fail;
470
        }
471
472
176
        for (i = 0; i < sps->poc_cycle_length; i++) {
473
100
            sps->offset_for_ref_frame[i] = get_se_golomb_long(gb);
474
100
            if (sps->offset_for_ref_frame[i] == INT32_MIN) {
475
                av_log(avctx, AV_LOG_ERROR,
476
                       "offset_for_ref_frame is out of range\n");
477
                goto fail;
478
            }
479
        }
480
1017
    } else if (sps->poc_type != 2) {
481
        av_log(avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
482
        goto fail;
483
    }
484
485
2094
    sps->ref_frame_count = get_ue_golomb_31(gb);
486
2094
    if (avctx->codec_tag == MKTAG('S', 'M', 'V', '2'))
487
        sps->ref_frame_count = FFMAX(2, sps->ref_frame_count);
488
2094
    if (sps->ref_frame_count > MAX_DELAYED_PIC_COUNT) {
489
        av_log(avctx, AV_LOG_ERROR,
490
               "too many reference frames %d\n", sps->ref_frame_count);
491
        goto fail;
492
    }
493
2094
    sps->gaps_in_frame_num_allowed_flag = get_bits1(gb);
494
2094
    sps->mb_width                       = get_ue_golomb(gb) + 1;
495
2094
    sps->mb_height                      = get_ue_golomb(gb) + 1;
496
497
2094
    sps->frame_mbs_only_flag = get_bits1(gb);
498
499
2094
    if (sps->mb_height >= INT_MAX / 2U) {
500
        av_log(avctx, AV_LOG_ERROR, "height overflow\n");
501
        goto fail;
502
    }
503
2094
    sps->mb_height *= 2 - sps->frame_mbs_only_flag;
504
505
2094
    if (!sps->frame_mbs_only_flag)
506
476
        sps->mb_aff = get_bits1(gb);
507
    else
508
1618
        sps->mb_aff = 0;
509
510
2094
    if ((unsigned)sps->mb_width  >= INT_MAX / 16 ||
511

4188
        (unsigned)sps->mb_height >= INT_MAX / 16 ||
512
2094
        av_image_check_size(16 * sps->mb_width,
513
2094
                            16 * sps->mb_height, 0, avctx)) {
514
        av_log(avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
515
        goto fail;
516
    }
517
518
2094
    sps->direct_8x8_inference_flag = get_bits1(gb);
519
520
#ifndef ALLOW_INTERLACE
521
    if (sps->mb_aff)
522
        av_log(avctx, AV_LOG_ERROR,
523
               "MBAFF support not included; enable it at compile-time.\n");
524
#endif
525
2094
    sps->crop = get_bits1(gb);
526
2094
    if (sps->crop) {
527
206
        unsigned int crop_left   = get_ue_golomb(gb);
528
206
        unsigned int crop_right  = get_ue_golomb(gb);
529
206
        unsigned int crop_top    = get_ue_golomb(gb);
530
206
        unsigned int crop_bottom = get_ue_golomb(gb);
531
206
        int width  = 16 * sps->mb_width;
532
206
        int height = 16 * sps->mb_height;
533
534
206
        if (avctx->flags2 & AV_CODEC_FLAG2_IGNORE_CROP) {
535
            av_log(avctx, AV_LOG_DEBUG, "discarding sps cropping, original "
536
                                           "values are l:%d r:%d t:%d b:%d\n",
537
                   crop_left, crop_right, crop_top, crop_bottom);
538
539
            sps->crop_left   =
540
            sps->crop_right  =
541
            sps->crop_top    =
542
            sps->crop_bottom = 0;
543
        } else {
544
206
            int vsub   = (sps->chroma_format_idc == 1) ? 1 : 0;
545
412
            int hsub   = (sps->chroma_format_idc == 1 ||
546

206
                          sps->chroma_format_idc == 2) ? 1 : 0;
547
206
            int step_x = 1 << hsub;
548
206
            int step_y = (2 - sps->frame_mbs_only_flag) << vsub;
549
550
206
            if (crop_left  > (unsigned)INT_MAX / 4 / step_x ||
551
206
                crop_right > (unsigned)INT_MAX / 4 / step_x ||
552
206
                crop_top   > (unsigned)INT_MAX / 4 / step_y ||
553
206
                crop_bottom> (unsigned)INT_MAX / 4 / step_y ||
554
206
                (crop_left + crop_right ) * step_x >= width ||
555
206
                (crop_top  + crop_bottom) * step_y >= height
556
            ) {
557
                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);
558
                goto fail;
559
            }
560
561
206
            sps->crop_left   = crop_left   * step_x;
562
206
            sps->crop_right  = crop_right  * step_x;
563
206
            sps->crop_top    = crop_top    * step_y;
564
206
            sps->crop_bottom = crop_bottom * step_y;
565
        }
566
    } else {
567
1888
        sps->crop_left   =
568
1888
        sps->crop_right  =
569
1888
        sps->crop_top    =
570
1888
        sps->crop_bottom =
571
1888
        sps->crop        = 0;
572
    }
573
574
2094
    sps->vui_parameters_present_flag = get_bits1(gb);
575
2094
    if (sps->vui_parameters_present_flag) {
576
534
        int ret = decode_vui_parameters(gb, avctx, sps);
577
534
        if (ret < 0)
578
            goto fail;
579
    }
580
581
2094
    if (get_bits_left(gb) < 0) {
582
4
        av_log(avctx, ignore_truncation ? AV_LOG_WARNING : AV_LOG_ERROR,
583
4
               "Overread %s by %d bits\n", sps->vui_parameters_present_flag ? "VUI" : "SPS", -get_bits_left(gb));
584
4
        if (!ignore_truncation)
585
4
            goto fail;
586
    }
587
588
    /* if the maximum delay is not stored in the SPS, derive it based on the
589
     * level */
590
2090
    if (!sps->bitstream_restriction_flag &&
591

1653
        (sps->ref_frame_count || avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT)) {
592
1594
        sps->num_reorder_frames = MAX_DELAYED_PIC_COUNT - 1;
593
8641
        for (i = 0; i < FF_ARRAY_ELEMS(level_max_dpb_mbs); i++) {
594
8641
            if (level_max_dpb_mbs[i][0] == sps->level_idc) {
595
1594
                sps->num_reorder_frames = FFMIN(level_max_dpb_mbs[i][1] / (sps->mb_width * sps->mb_height),
596
                                                sps->num_reorder_frames);
597
1594
                break;
598
            }
599
        }
600
    }
601
602
2090
    if (!sps->sar.den)
603
1897
        sps->sar.den = 1;
604
605
2090
    if (avctx->debug & FF_DEBUG_PICT_INFO) {
606
        static const char csp[4][5] = { "Gray", "420", "422", "444" };
607
        av_log(avctx, AV_LOG_DEBUG,
608
               "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",
609
               sps_id, sps->profile_idc, sps->level_idc,
610
               sps->poc_type,
611
               sps->ref_frame_count,
612
               sps->mb_width, sps->mb_height,
613
               sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
614
               sps->direct_8x8_inference_flag ? "8B8" : "",
615
               sps->crop_left, sps->crop_right,
616
               sps->crop_top, sps->crop_bottom,
617
               sps->vui_parameters_present_flag ? "VUI" : "",
618
               csp[sps->chroma_format_idc],
619
               sps->timing_info_present_flag ? sps->num_units_in_tick : 0,
620
               sps->timing_info_present_flag ? sps->time_scale : 0,
621
               sps->bit_depth_luma,
622
               sps->bitstream_restriction_flag ? sps->num_reorder_frames : -1
623
               );
624
    }
625
626
    /* check if this is a repeat of an already parsed SPS, then keep the
627
     * original one.
628
     * otherwise drop all PPSes that depend on it */
629
2090
    if (ps->sps_list[sps_id] &&
630
1318
        !memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {
631
1290
        av_buffer_unref(&sps_buf);
632
    } else {
633
800
        remove_sps(ps, sps_id);
634
800
        ps->sps_list[sps_id] = sps_buf;
635
    }
636
637
2090
    return 0;
638
639
4
fail:
640
4
    av_buffer_unref(&sps_buf);
641
4
    return AVERROR_INVALIDDATA;
642
}
643
644
602
static void init_dequant8_coeff_table(PPS *pps, const SPS *sps)
645
{
646
    int i, j, q, x;
647
602
    const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
648
649
4214
    for (i = 0; i < 6; i++) {
650
3612
        pps->dequant8_coeff[i] = pps->dequant8_buffer[i];
651
5466
        for (j = 0; j < i; j++)
652
4337
            if (!memcmp(pps->scaling_matrix8[j], pps->scaling_matrix8[i],
653
                        64 * sizeof(uint8_t))) {
654
2483
                pps->dequant8_coeff[i] = pps->dequant8_buffer[j];
655
2483
                break;
656
            }
657
3612
        if (j < i)
658
2483
            continue;
659
660
61115
        for (q = 0; q < max_qp + 1; q++) {
661
59986
            int shift = ff_h264_quant_div6[q];
662
59986
            int idx   = ff_h264_quant_rem6[q];
663
3899090
            for (x = 0; x < 64; x++)
664
3839104
                pps->dequant8_coeff[i][q][(x >> 3) | ((x & 7) << 3)] =
665
3839104
                    ((uint32_t)ff_h264_dequant8_coeff_init[idx][ff_h264_dequant8_coeff_init_scan[((x >> 1) & 12) | (x & 3)]] *
666
3839104
                     pps->scaling_matrix8[i][x]) << shift;
667
        }
668
    }
669
602
}
670
671
13809
static void init_dequant4_coeff_table(PPS *pps, const SPS *sps)
672
{
673
    int i, j, q, x;
674
13809
    const int max_qp = 51 + 6 * (sps->bit_depth_luma - 8);
675
96663
    for (i = 0; i < 6; i++) {
676
82854
        pps->dequant4_coeff[i] = pps->dequant4_buffer[i];
677
87013
        for (j = 0; j < i; j++)
678
72387
            if (!memcmp(pps->scaling_matrix4[j], pps->scaling_matrix4[i],
679
                        16 * sizeof(uint8_t))) {
680
68228
                pps->dequant4_coeff[i] = pps->dequant4_buffer[j];
681
68228
                break;
682
            }
683
82854
        if (j < i)
684
68228
            continue;
685
686
776822
        for (q = 0; q < max_qp + 1; q++) {
687
762196
            int shift = ff_h264_quant_div6[q] + 2;
688
762196
            int idx   = ff_h264_quant_rem6[q];
689
12957332
            for (x = 0; x < 16; x++)
690
12195136
                pps->dequant4_coeff[i][q][(x >> 2) | ((x << 2) & 0xF)] =
691
12195136
                    ((uint32_t)ff_h264_dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] *
692
12195136
                     pps->scaling_matrix4[i][x]) << shift;
693
        }
694
    }
695
13809
}
696
697
13809
static void init_dequant_tables(PPS *pps, const SPS *sps)
698
{
699
    int i, x;
700
13809
    init_dequant4_coeff_table(pps, sps);
701
13809
    memset(pps->dequant8_coeff, 0, sizeof(pps->dequant8_coeff));
702
703
13809
    if (pps->transform_8x8_mode)
704
602
        init_dequant8_coeff_table(pps, sps);
705
13809
    if (sps->transform_bypass) {
706
133
        for (i = 0; i < 6; i++)
707
1938
            for (x = 0; x < 16; x++)
708
1824
                pps->dequant4_coeff[i][0][x] = 1 << 6;
709
19
        if (pps->transform_8x8_mode)
710
126
            for (i = 0; i < 6; i++)
711
7020
                for (x = 0; x < 64; x++)
712
6912
                    pps->dequant8_coeff[i][0][x] = 1 << 6;
713
    }
714
13809
}
715
716
27618
static void build_qp_table(PPS *pps, int t, int index, const int depth)
717
{
718
    int i;
719
27618
    const int max_qp = 51 + 6 * (depth - 8);
720
1466634
    for (i = 0; i < max_qp + 1; i++)
721
1439016
        pps->chroma_qp_table[t][i] =
722
1439016
            ff_h264_chroma_qp[depth - 8][av_clip(i + index, 0, max_qp)];
723
27618
}
724
725
615
static int more_rbsp_data_in_pps(const SPS *sps, void *logctx)
726
{
727
615
    int profile_idc = sps->profile_idc;
728
729

615
    if ((profile_idc == 66 || profile_idc == 77 ||
730
13
         profile_idc == 88) && (sps->constraint_set_flags & 7)) {
731
1
        av_log(logctx, AV_LOG_VERBOSE,
732
               "Current profile doesn't provide more RBSP data in PPS, skipping\n");
733
1
        return 0;
734
    }
735
736
614
    return 1;
737
}
738
739
13813
int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
740
                                         H264ParamSets *ps, int bit_length)
741
{
742
    AVBufferRef *pps_buf;
743
    const SPS *sps;
744
13813
    unsigned int pps_id = get_ue_golomb(gb);
745
    PPS *pps;
746
    int qp_bd_offset;
747
    int bits_left;
748
    int ret;
749
750
13813
    if (pps_id >= MAX_PPS_COUNT) {
751
        av_log(avctx, AV_LOG_ERROR, "pps_id %u out of range\n", pps_id);
752
        return AVERROR_INVALIDDATA;
753
    }
754
755
13813
    pps_buf = av_buffer_allocz(sizeof(*pps));
756
13813
    if (!pps_buf)
757
        return AVERROR(ENOMEM);
758
13813
    pps = (PPS*)pps_buf->data;
759
760
13813
    pps->data_size = gb->buffer_end - gb->buffer;
761
13813
    if (pps->data_size > sizeof(pps->data)) {
762
        av_log(avctx, AV_LOG_DEBUG, "Truncating likely oversized PPS "
763
               "(%"SIZE_SPECIFIER" > %"SIZE_SPECIFIER")\n",
764
               pps->data_size, sizeof(pps->data));
765
        pps->data_size = sizeof(pps->data);
766
    }
767
13813
    memcpy(pps->data, gb->buffer, pps->data_size);
768
769
13813
    pps->sps_id = get_ue_golomb_31(gb);
770
13813
    if ((unsigned)pps->sps_id >= MAX_SPS_COUNT ||
771
13813
        !ps->sps_list[pps->sps_id]) {
772
        av_log(avctx, AV_LOG_ERROR, "sps_id %u out of range\n", pps->sps_id);
773
        ret = AVERROR_INVALIDDATA;
774
        goto fail;
775
    }
776
13813
    sps = (const SPS*)ps->sps_list[pps->sps_id]->data;
777
13813
    if (sps->bit_depth_luma > 14) {
778
        av_log(avctx, AV_LOG_ERROR,
779
               "Invalid luma bit depth=%d\n",
780
               sps->bit_depth_luma);
781
        ret = AVERROR_INVALIDDATA;
782
        goto fail;
783

13813
    } else if (sps->bit_depth_luma == 11 || sps->bit_depth_luma == 13) {
784
        avpriv_report_missing_feature(avctx,
785
               "Unimplemented luma bit depth=%d",
786
               sps->bit_depth_luma);
787
        ret = AVERROR_PATCHWELCOME;
788
        goto fail;
789
    }
790
791
13813
    pps->cabac             = get_bits1(gb);
792
13813
    pps->pic_order_present = get_bits1(gb);
793
13813
    pps->slice_group_count = get_ue_golomb(gb) + 1;
794
13813
    if (pps->slice_group_count > 1) {
795
14
        pps->mb_slice_group_map_type = get_ue_golomb(gb);
796
14
        av_log(avctx, AV_LOG_ERROR, "FMO not supported\n");
797
    }
798
13813
    pps->ref_count[0] = get_ue_golomb(gb) + 1;
799
13813
    pps->ref_count[1] = get_ue_golomb(gb) + 1;
800

13813
    if (pps->ref_count[0] - 1 > 32 - 1 || pps->ref_count[1] - 1 > 32 - 1) {
801
4
        av_log(avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
802
4
        ret = AVERROR_INVALIDDATA;
803
4
        goto fail;
804
    }
805
806
13809
    qp_bd_offset = 6 * (sps->bit_depth_luma - 8);
807
808
13809
    pps->weighted_pred                        = get_bits1(gb);
809
13809
    pps->weighted_bipred_idc                  = get_bits(gb, 2);
810
13809
    pps->init_qp                              = get_se_golomb(gb) + 26U + qp_bd_offset;
811
13809
    pps->init_qs                              = get_se_golomb(gb) + 26U + qp_bd_offset;
812
13809
    pps->chroma_qp_index_offset[0]            = get_se_golomb(gb);
813

13809
    if (pps->chroma_qp_index_offset[0] < -12 || pps->chroma_qp_index_offset[0] > 12) {
814
        ret = AVERROR_INVALIDDATA;
815
        goto fail;
816
    }
817
818
13809
    pps->deblocking_filter_parameters_present = get_bits1(gb);
819
13809
    pps->constrained_intra_pred               = get_bits1(gb);
820
13809
    pps->redundant_pic_cnt_present            = get_bits1(gb);
821
822
13809
    pps->transform_8x8_mode = 0;
823
13809
    memcpy(pps->scaling_matrix4, sps->scaling_matrix4,
824
           sizeof(pps->scaling_matrix4));
825
13809
    memcpy(pps->scaling_matrix8, sps->scaling_matrix8,
826
           sizeof(pps->scaling_matrix8));
827
828
13809
    bits_left = bit_length - get_bits_count(gb);
829

13809
    if (bits_left > 0 && more_rbsp_data_in_pps(sps, avctx)) {
830
614
        pps->transform_8x8_mode = get_bits1(gb);
831
614
        ret = decode_scaling_matrices(gb, sps, pps, 0,
832
614
                                pps->scaling_matrix4, pps->scaling_matrix8);
833
614
        if (ret < 0)
834
            goto fail;
835
        // second_chroma_qp_index_offset
836
614
        pps->chroma_qp_index_offset[1] = get_se_golomb(gb);
837

614
        if (pps->chroma_qp_index_offset[1] < -12 || pps->chroma_qp_index_offset[1] > 12) {
838
            ret = AVERROR_INVALIDDATA;
839
            goto fail;
840
        }
841
    } else {
842
13195
        pps->chroma_qp_index_offset[1] = pps->chroma_qp_index_offset[0];
843
    }
844
845
13809
    build_qp_table(pps, 0, pps->chroma_qp_index_offset[0],
846
                   sps->bit_depth_luma);
847
13809
    build_qp_table(pps, 1, pps->chroma_qp_index_offset[1],
848
                   sps->bit_depth_luma);
849
850
13809
    init_dequant_tables(pps, sps);
851
852
13809
    if (pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
853
75
        pps->chroma_qp_diff = 1;
854
855
13809
    if (avctx->debug & FF_DEBUG_PICT_INFO) {
856
        av_log(avctx, AV_LOG_DEBUG,
857
               "pps:%u sps:%u %s slice_groups:%d ref:%u/%u %s qp:%d/%d/%d/%d %s %s %s %s\n",
858
               pps_id, pps->sps_id,
859
               pps->cabac ? "CABAC" : "CAVLC",
860
               pps->slice_group_count,
861
               pps->ref_count[0], pps->ref_count[1],
862
               pps->weighted_pred ? "weighted" : "",
863
               pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
864
               pps->deblocking_filter_parameters_present ? "LPAR" : "",
865
               pps->constrained_intra_pred ? "CONSTR" : "",
866
               pps->redundant_pic_cnt_present ? "REDU" : "",
867
               pps->transform_8x8_mode ? "8x8DCT" : "");
868
    }
869
870
13809
    remove_pps(ps, pps_id);
871
13809
    ps->pps_list[pps_id] = pps_buf;
872
873
13809
    return 0;
874
875
4
fail:
876
4
    av_buffer_unref(&pps_buf);
877
4
    return ret;
878
}