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/* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "bytestream.h" |
20 |
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#include "get_bits.h" |
21 |
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#include "golomb.h" |
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#include "h264.h" |
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#include "h264dec.h" |
24 |
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#include "h264_parse.h" |
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#include "h264_ps.h" |
26 |
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27 |
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2893 |
int ff_h264_pred_weight_table(GetBitContext *gb, const SPS *sps, |
28 |
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const int *ref_count, int slice_type_nos, |
29 |
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H264PredWeightTable *pwt, |
30 |
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int picture_structure, void *logctx) |
31 |
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{ |
32 |
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int list, i, j; |
33 |
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int luma_def, chroma_def; |
34 |
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35 |
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2893 |
pwt->use_weight = 0; |
36 |
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2893 |
pwt->use_weight_chroma = 0; |
37 |
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|
38 |
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2893 |
pwt->luma_log2_weight_denom = get_ue_golomb_31(gb); |
39 |
✗✓ |
2893 |
if (pwt->luma_log2_weight_denom > 7U) { |
40 |
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av_log(logctx, AV_LOG_ERROR, "luma_log2_weight_denom %d is out of range\n", pwt->luma_log2_weight_denom); |
41 |
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pwt->luma_log2_weight_denom = 0; |
42 |
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} |
43 |
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2893 |
luma_def = 1 << pwt->luma_log2_weight_denom; |
44 |
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|
45 |
✓✗ |
2893 |
if (sps->chroma_format_idc) { |
46 |
|
2893 |
pwt->chroma_log2_weight_denom = get_ue_golomb_31(gb); |
47 |
✗✓ |
2893 |
if (pwt->chroma_log2_weight_denom > 7U) { |
48 |
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av_log(logctx, AV_LOG_ERROR, "chroma_log2_weight_denom %d is out of range\n", pwt->chroma_log2_weight_denom); |
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pwt->chroma_log2_weight_denom = 0; |
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} |
51 |
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2893 |
chroma_def = 1 << pwt->chroma_log2_weight_denom; |
52 |
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} |
53 |
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54 |
✓✓ |
3485 |
for (list = 0; list < 2; list++) { |
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3189 |
pwt->luma_weight_flag[list] = 0; |
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3189 |
pwt->chroma_weight_flag[list] = 0; |
57 |
✓✓ |
16174 |
for (i = 0; i < ref_count[list]; i++) { |
58 |
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int luma_weight_flag, chroma_weight_flag; |
59 |
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|
60 |
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12985 |
luma_weight_flag = get_bits1(gb); |
61 |
✓✓ |
12985 |
if (luma_weight_flag) { |
62 |
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5434 |
pwt->luma_weight[i][list][0] = get_se_golomb(gb); |
63 |
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5434 |
pwt->luma_weight[i][list][1] = get_se_golomb(gb); |
64 |
✓✗ |
5434 |
if ((int8_t)pwt->luma_weight[i][list][0] != pwt->luma_weight[i][list][0] || |
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✗✓ |
5434 |
(int8_t)pwt->luma_weight[i][list][1] != pwt->luma_weight[i][list][1]) |
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goto out_range_weight; |
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✓✓ |
5434 |
if (pwt->luma_weight[i][list][0] != luma_def || |
68 |
✓✓ |
1665 |
pwt->luma_weight[i][list][1] != 0) { |
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4909 |
pwt->use_weight = 1; |
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4909 |
pwt->luma_weight_flag[list] = 1; |
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} |
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} else { |
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7551 |
pwt->luma_weight[i][list][0] = luma_def; |
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7551 |
pwt->luma_weight[i][list][1] = 0; |
75 |
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} |
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✓✗ |
12985 |
if (sps->chroma_format_idc) { |
78 |
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12985 |
chroma_weight_flag = get_bits1(gb); |
79 |
✓✓ |
12985 |
if (chroma_weight_flag) { |
80 |
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int j; |
81 |
✓✓ |
8538 |
for (j = 0; j < 2; j++) { |
82 |
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5692 |
pwt->chroma_weight[i][list][j][0] = get_se_golomb(gb); |
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5692 |
pwt->chroma_weight[i][list][j][1] = get_se_golomb(gb); |
84 |
✓✗ |
5692 |
if ((int8_t)pwt->chroma_weight[i][list][j][0] != pwt->chroma_weight[i][list][j][0] || |
85 |
✗✓ |
5692 |
(int8_t)pwt->chroma_weight[i][list][j][1] != pwt->chroma_weight[i][list][j][1]) { |
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pwt->chroma_weight[i][list][j][0] = chroma_def; |
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pwt->chroma_weight[i][list][j][1] = 0; |
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goto out_range_weight; |
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} |
90 |
✓✓ |
5692 |
if (pwt->chroma_weight[i][list][j][0] != chroma_def || |
91 |
✓✓ |
583 |
pwt->chroma_weight[i][list][j][1] != 0) { |
92 |
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5679 |
pwt->use_weight_chroma = 1; |
93 |
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5679 |
pwt->chroma_weight_flag[list] = 1; |
94 |
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} |
95 |
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} |
96 |
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} else { |
97 |
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int j; |
98 |
✓✓ |
30417 |
for (j = 0; j < 2; j++) { |
99 |
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20278 |
pwt->chroma_weight[i][list][j][0] = chroma_def; |
100 |
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20278 |
pwt->chroma_weight[i][list][j][1] = 0; |
101 |
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} |
102 |
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} |
103 |
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} |
104 |
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105 |
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// for MBAFF |
106 |
✓✓ |
12985 |
if (picture_structure == PICT_FRAME) { |
107 |
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11493 |
pwt->luma_weight[16 + 2 * i][list][0] = pwt->luma_weight[16 + 2 * i + 1][list][0] = pwt->luma_weight[i][list][0]; |
108 |
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11493 |
pwt->luma_weight[16 + 2 * i][list][1] = pwt->luma_weight[16 + 2 * i + 1][list][1] = pwt->luma_weight[i][list][1]; |
109 |
✓✗ |
11493 |
if (sps->chroma_format_idc) { |
110 |
✓✓ |
34479 |
for (j = 0; j < 2; j++) { |
111 |
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22986 |
pwt->chroma_weight[16 + 2 * i][list][j][0] = pwt->chroma_weight[16 + 2 * i + 1][list][j][0] = pwt->chroma_weight[i][list][j][0]; |
112 |
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22986 |
pwt->chroma_weight[16 + 2 * i][list][j][1] = pwt->chroma_weight[16 + 2 * i + 1][list][j][1] = pwt->chroma_weight[i][list][j][1]; |
113 |
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} |
114 |
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} |
115 |
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} |
116 |
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} |
117 |
✓✓ |
3189 |
if (slice_type_nos != AV_PICTURE_TYPE_B) |
118 |
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2597 |
break; |
119 |
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} |
120 |
✓✓✓✓
|
2893 |
pwt->use_weight = pwt->use_weight || pwt->use_weight_chroma; |
121 |
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2893 |
return 0; |
122 |
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out_range_weight: |
123 |
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avpriv_request_sample(logctx, "Out of range weight"); |
124 |
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return AVERROR_INVALIDDATA; |
125 |
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} |
126 |
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127 |
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/** |
128 |
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* Check if the top & left blocks are available if needed and |
129 |
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* change the dc mode so it only uses the available blocks. |
130 |
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*/ |
131 |
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3004518 |
int ff_h264_check_intra4x4_pred_mode(int8_t *pred_mode_cache, void *logctx, |
132 |
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int top_samples_available, int left_samples_available) |
133 |
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{ |
134 |
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static const int8_t top[12] = { |
135 |
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-1, 0, LEFT_DC_PRED, -1, -1, -1, -1, -1, 0 |
136 |
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}; |
137 |
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static const int8_t left[12] = { |
138 |
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0, -1, TOP_DC_PRED, 0, -1, -1, -1, 0, -1, DC_128_PRED |
139 |
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}; |
140 |
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int i; |
141 |
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|
142 |
✓✓ |
3004518 |
if (!(top_samples_available & 0x8000)) { |
143 |
✓✓ |
1026905 |
for (i = 0; i < 4; i++) { |
144 |
|
821524 |
int status = top[pred_mode_cache[scan8[0] + i]]; |
145 |
✗✓ |
821524 |
if (status < 0) { |
146 |
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av_log(logctx, AV_LOG_ERROR, |
147 |
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"top block unavailable for requested intra mode %d\n", |
148 |
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status); |
149 |
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return AVERROR_INVALIDDATA; |
150 |
✓✓ |
821524 |
} else if (status) { |
151 |
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532134 |
pred_mode_cache[scan8[0] + i] = status; |
152 |
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} |
153 |
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} |
154 |
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} |
155 |
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|
156 |
✓✓ |
3004518 |
if ((left_samples_available & 0x8888) != 0x8888) { |
157 |
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static const int mask[4] = { 0x8000, 0x2000, 0x80, 0x20 }; |
158 |
✓✓ |
333290 |
for (i = 0; i < 4; i++) |
159 |
✓✓ |
266632 |
if (!(left_samples_available & mask[i])) { |
160 |
|
266578 |
int status = left[pred_mode_cache[scan8[0] + 8 * i]]; |
161 |
✗✓ |
266578 |
if (status < 0) { |
162 |
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av_log(logctx, AV_LOG_ERROR, |
163 |
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"left block unavailable for requested intra4x4 mode %d\n", |
164 |
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status); |
165 |
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return AVERROR_INVALIDDATA; |
166 |
✓✓ |
266578 |
} else if (status) { |
167 |
|
96976 |
pred_mode_cache[scan8[0] + 8 * i] = status; |
168 |
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} |
169 |
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} |
170 |
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} |
171 |
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|
172 |
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3004518 |
return 0; |
173 |
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} |
174 |
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|
175 |
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/** |
176 |
|
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* Check if the top & left blocks are available if needed and |
177 |
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* change the dc mode so it only uses the available blocks. |
178 |
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*/ |
179 |
|
4599251 |
int ff_h264_check_intra_pred_mode(void *logctx, int top_samples_available, |
180 |
|
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int left_samples_available, |
181 |
|
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int mode, int is_chroma) |
182 |
|
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{ |
183 |
|
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static const int8_t top[4] = { LEFT_DC_PRED8x8, 1, -1, -1 }; |
184 |
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static const int8_t left[5] = { TOP_DC_PRED8x8, -1, 2, -1, DC_128_PRED8x8 }; |
185 |
|
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|
186 |
✗✓ |
4599251 |
if (mode > 3U) { |
187 |
|
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av_log(logctx, AV_LOG_ERROR, |
188 |
|
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"out of range intra chroma pred mode\n"); |
189 |
|
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return AVERROR_INVALIDDATA; |
190 |
|
|
} |
191 |
|
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|
192 |
✓✓ |
4599251 |
if (!(top_samples_available & 0x8000)) { |
193 |
|
338030 |
mode = top[mode]; |
194 |
✗✓ |
338030 |
if (mode < 0) { |
195 |
|
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av_log(logctx, AV_LOG_ERROR, |
196 |
|
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"top block unavailable for requested intra mode\n"); |
197 |
|
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return AVERROR_INVALIDDATA; |
198 |
|
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} |
199 |
|
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} |
200 |
|
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|
201 |
✓✓ |
4599251 |
if ((left_samples_available & 0x8080) != 0x8080) { |
202 |
|
100493 |
mode = left[mode]; |
203 |
✗✓ |
100493 |
if (mode < 0) { |
204 |
|
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av_log(logctx, AV_LOG_ERROR, |
205 |
|
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"left block unavailable for requested intra mode\n"); |
206 |
|
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return AVERROR_INVALIDDATA; |
207 |
|
|
} |
208 |
✓✓✓✓
|
100493 |
if (is_chroma && (left_samples_available & 0x8080)) { |
209 |
|
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// mad cow disease mode, aka MBAFF + constrained_intra_pred |
210 |
|
54 |
mode = ALZHEIMER_DC_L0T_PRED8x8 + |
211 |
✓✓ |
27 |
(!(left_samples_available & 0x8000)) + |
212 |
✓✓ |
27 |
2 * (mode == DC_128_PRED8x8); |
213 |
|
|
} |
214 |
|
|
} |
215 |
|
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|
216 |
|
4599251 |
return mode; |
217 |
|
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} |
218 |
|
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|
219 |
|
50443 |
int ff_h264_parse_ref_count(int *plist_count, int ref_count[2], |
220 |
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GetBitContext *gb, const PPS *pps, |
221 |
|
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int slice_type_nos, int picture_structure, void *logctx) |
222 |
|
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{ |
223 |
|
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int list_count; |
224 |
|
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int num_ref_idx_active_override_flag; |
225 |
|
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|
226 |
|
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// set defaults, might be overridden a few lines later |
227 |
|
50443 |
ref_count[0] = pps->ref_count[0]; |
228 |
|
50443 |
ref_count[1] = pps->ref_count[1]; |
229 |
|
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|
230 |
✓✓ |
50443 |
if (slice_type_nos != AV_PICTURE_TYPE_I) { |
231 |
|
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unsigned max[2]; |
232 |
✓✓ |
44561 |
max[0] = max[1] = picture_structure == PICT_FRAME ? 15 : 31; |
233 |
|
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|
234 |
|
44561 |
num_ref_idx_active_override_flag = get_bits1(gb); |
235 |
|
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|
236 |
✓✓ |
44561 |
if (num_ref_idx_active_override_flag) { |
237 |
|
20144 |
ref_count[0] = get_ue_golomb(gb) + 1; |
238 |
✓✓ |
20144 |
if (slice_type_nos == AV_PICTURE_TYPE_B) { |
239 |
|
6146 |
ref_count[1] = get_ue_golomb(gb) + 1; |
240 |
|
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} else |
241 |
|
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// full range is spec-ok in this case, even for frames |
242 |
|
13998 |
ref_count[1] = 1; |
243 |
|
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} |
244 |
|
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|
245 |
✓✓ |
44561 |
if (slice_type_nos == AV_PICTURE_TYPE_B) |
246 |
|
12635 |
list_count = 2; |
247 |
|
|
else |
248 |
|
31926 |
list_count = 1; |
249 |
|
|
|
250 |
✓✗✓✓ ✗✓ |
44561 |
if (ref_count[0] - 1 > max[0] || (list_count == 2 && (ref_count[1] - 1 > max[1]))) { |
251 |
|
|
av_log(logctx, AV_LOG_ERROR, "reference overflow %u > %u or %u > %u\n", |
252 |
|
|
ref_count[0] - 1, max[0], ref_count[1] - 1, max[1]); |
253 |
|
|
ref_count[0] = ref_count[1] = 0; |
254 |
|
|
*plist_count = 0; |
255 |
|
|
goto fail; |
256 |
✗✓ |
44561 |
} else if (ref_count[1] - 1 > max[1]) { |
257 |
|
|
av_log(logctx, AV_LOG_DEBUG, "reference overflow %u > %u \n", |
258 |
|
|
ref_count[1] - 1, max[1]); |
259 |
|
|
ref_count[1] = 0; |
260 |
|
|
} |
261 |
|
|
|
262 |
|
|
} else { |
263 |
|
5882 |
list_count = 0; |
264 |
|
5882 |
ref_count[0] = ref_count[1] = 0; |
265 |
|
|
} |
266 |
|
|
|
267 |
|
50443 |
*plist_count = list_count; |
268 |
|
|
|
269 |
|
50443 |
return 0; |
270 |
|
|
fail: |
271 |
|
|
*plist_count = 0; |
272 |
|
|
ref_count[0] = 0; |
273 |
|
|
ref_count[1] = 0; |
274 |
|
|
return AVERROR_INVALIDDATA; |
275 |
|
|
} |
276 |
|
|
|
277 |
|
52239 |
int ff_h264_init_poc(int pic_field_poc[2], int *pic_poc, |
278 |
|
|
const SPS *sps, H264POCContext *pc, |
279 |
|
|
int picture_structure, int nal_ref_idc) |
280 |
|
|
{ |
281 |
|
52239 |
const int max_frame_num = 1 << sps->log2_max_frame_num; |
282 |
|
|
int64_t field_poc[2]; |
283 |
|
|
|
284 |
|
52239 |
pc->frame_num_offset = pc->prev_frame_num_offset; |
285 |
✓✓ |
52239 |
if (pc->frame_num < pc->prev_frame_num) |
286 |
|
307 |
pc->frame_num_offset += max_frame_num; |
287 |
|
|
|
288 |
✓✓ |
52239 |
if (sps->poc_type == 0) { |
289 |
|
39547 |
const int max_poc_lsb = 1 << sps->log2_max_poc_lsb; |
290 |
✓✓ |
39547 |
if (pc->prev_poc_lsb < 0) |
291 |
|
749 |
pc->prev_poc_lsb = pc->poc_lsb; |
292 |
|
|
|
293 |
✓✓ |
39547 |
if (pc->poc_lsb < pc->prev_poc_lsb && |
294 |
✓✓ |
18540 |
pc->prev_poc_lsb - pc->poc_lsb >= max_poc_lsb / 2) |
295 |
|
231 |
pc->poc_msb = pc->prev_poc_msb + max_poc_lsb; |
296 |
✓✓ |
39316 |
else if (pc->poc_lsb > pc->prev_poc_lsb && |
297 |
✓✓ |
18547 |
pc->prev_poc_lsb - pc->poc_lsb < -max_poc_lsb / 2) |
298 |
|
211 |
pc->poc_msb = pc->prev_poc_msb - max_poc_lsb; |
299 |
|
|
else |
300 |
|
39105 |
pc->poc_msb = pc->prev_poc_msb; |
301 |
|
39547 |
field_poc[0] = |
302 |
|
39547 |
field_poc[1] = pc->poc_msb + pc->poc_lsb; |
303 |
✓✓ |
39547 |
if (picture_structure == PICT_FRAME) |
304 |
|
28099 |
field_poc[1] += pc->delta_poc_bottom; |
305 |
✓✓ |
12692 |
} else if (sps->poc_type == 1) { |
306 |
|
|
int abs_frame_num; |
307 |
|
|
int64_t expected_delta_per_poc_cycle, expectedpoc; |
308 |
|
|
int i; |
309 |
|
|
|
310 |
✓✗ |
6180 |
if (sps->poc_cycle_length != 0) |
311 |
|
6180 |
abs_frame_num = pc->frame_num_offset + pc->frame_num; |
312 |
|
|
else |
313 |
|
|
abs_frame_num = 0; |
314 |
|
|
|
315 |
✓✓✓✗
|
6180 |
if (nal_ref_idc == 0 && abs_frame_num > 0) |
316 |
|
397 |
abs_frame_num--; |
317 |
|
|
|
318 |
|
6180 |
expected_delta_per_poc_cycle = 0; |
319 |
✓✓ |
16194 |
for (i = 0; i < sps->poc_cycle_length; i++) |
320 |
|
|
// FIXME integrate during sps parse |
321 |
|
10014 |
expected_delta_per_poc_cycle += sps->offset_for_ref_frame[i]; |
322 |
|
|
|
323 |
✓✓ |
6180 |
if (abs_frame_num > 0) { |
324 |
|
6098 |
int poc_cycle_cnt = (abs_frame_num - 1) / sps->poc_cycle_length; |
325 |
|
6098 |
int frame_num_in_poc_cycle = (abs_frame_num - 1) % sps->poc_cycle_length; |
326 |
|
|
|
327 |
|
6098 |
expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle; |
328 |
✓✓ |
14018 |
for (i = 0; i <= frame_num_in_poc_cycle; i++) |
329 |
|
7920 |
expectedpoc = expectedpoc + sps->offset_for_ref_frame[i]; |
330 |
|
|
} else |
331 |
|
82 |
expectedpoc = 0; |
332 |
|
|
|
333 |
✓✓ |
6180 |
if (nal_ref_idc == 0) |
334 |
|
397 |
expectedpoc = expectedpoc + sps->offset_for_non_ref_pic; |
335 |
|
|
|
336 |
|
6180 |
field_poc[0] = expectedpoc + pc->delta_poc[0]; |
337 |
|
6180 |
field_poc[1] = field_poc[0] + sps->offset_for_top_to_bottom_field; |
338 |
|
|
|
339 |
✓✓ |
6180 |
if (picture_structure == PICT_FRAME) |
340 |
|
5249 |
field_poc[1] += pc->delta_poc[1]; |
341 |
|
|
} else { |
342 |
|
6512 |
int poc = 2 * (pc->frame_num_offset + pc->frame_num); |
343 |
|
|
|
344 |
✗✓ |
6512 |
if (!nal_ref_idc) |
345 |
|
|
poc--; |
346 |
|
|
|
347 |
|
6512 |
field_poc[0] = poc; |
348 |
|
6512 |
field_poc[1] = poc; |
349 |
|
|
} |
350 |
|
|
|
351 |
✓✗ |
52239 |
if ( field_poc[0] != (int)field_poc[0] |
352 |
✗✓ |
52239 |
|| field_poc[1] != (int)field_poc[1]) |
353 |
|
|
return AVERROR_INVALIDDATA; |
354 |
|
|
|
355 |
✓✓ |
52239 |
if (picture_structure != PICT_BOTTOM_FIELD) |
356 |
|
46057 |
pic_field_poc[0] = field_poc[0]; |
357 |
✓✓ |
52239 |
if (picture_structure != PICT_TOP_FIELD) |
358 |
|
46042 |
pic_field_poc[1] = field_poc[1]; |
359 |
|
52239 |
*pic_poc = FFMIN(pic_field_poc[0], pic_field_poc[1]); |
360 |
|
|
|
361 |
|
52239 |
return 0; |
362 |
|
|
} |
363 |
|
|
|
364 |
|
512 |
static int decode_extradata_ps(const uint8_t *data, int size, H264ParamSets *ps, |
365 |
|
|
int is_avc, void *logctx) |
366 |
|
|
{ |
367 |
|
512 |
H2645Packet pkt = { 0 }; |
368 |
|
512 |
int i, ret = 0; |
369 |
|
|
|
370 |
|
512 |
ret = ff_h2645_packet_split(&pkt, data, size, logctx, is_avc, 2, AV_CODEC_ID_H264, 1, 0); |
371 |
✗✓ |
512 |
if (ret < 0) { |
372 |
|
|
ret = 0; |
373 |
|
|
goto fail; |
374 |
|
|
} |
375 |
|
|
|
376 |
✓✓ |
1233 |
for (i = 0; i < pkt.nb_nals; i++) { |
377 |
|
721 |
H2645NAL *nal = &pkt.nals[i]; |
378 |
✓✓✗ |
721 |
switch (nal->type) { |
379 |
|
360 |
case H264_NAL_SPS: { |
380 |
|
360 |
GetBitContext tmp_gb = nal->gb; |
381 |
|
360 |
ret = ff_h264_decode_seq_parameter_set(&tmp_gb, logctx, ps, 0); |
382 |
✓✓ |
360 |
if (ret >= 0) |
383 |
|
360 |
break; |
384 |
|
2 |
av_log(logctx, AV_LOG_DEBUG, |
385 |
|
|
"SPS decoding failure, trying again with the complete NAL\n"); |
386 |
|
2 |
init_get_bits8(&tmp_gb, nal->raw_data + 1, nal->raw_size - 1); |
387 |
|
2 |
ret = ff_h264_decode_seq_parameter_set(&tmp_gb, logctx, ps, 0); |
388 |
✓✗ |
2 |
if (ret >= 0) |
389 |
|
2 |
break; |
390 |
|
|
ret = ff_h264_decode_seq_parameter_set(&nal->gb, logctx, ps, 1); |
391 |
|
|
if (ret < 0) |
392 |
|
|
goto fail; |
393 |
|
|
break; |
394 |
|
|
} |
395 |
|
361 |
case H264_NAL_PPS: |
396 |
|
361 |
ret = ff_h264_decode_picture_parameter_set(&nal->gb, logctx, ps, |
397 |
|
|
nal->size_bits); |
398 |
✗✓ |
361 |
if (ret < 0) |
399 |
|
|
goto fail; |
400 |
|
361 |
break; |
401 |
|
|
default: |
402 |
|
|
av_log(logctx, AV_LOG_VERBOSE, "Ignoring NAL type %d in extradata\n", |
403 |
|
|
nal->type); |
404 |
|
|
break; |
405 |
|
|
} |
406 |
|
|
} |
407 |
|
|
|
408 |
|
512 |
fail: |
409 |
|
512 |
ff_h2645_packet_uninit(&pkt); |
410 |
|
512 |
return ret; |
411 |
|
|
} |
412 |
|
|
|
413 |
|
|
/* There are (invalid) samples in the wild with mp4-style extradata, where the |
414 |
|
|
* parameter sets are stored unescaped (i.e. as RBSP). |
415 |
|
|
* This function catches the parameter set decoding failure and tries again |
416 |
|
|
* after escaping it */ |
417 |
|
304 |
static int decode_extradata_ps_mp4(const uint8_t *buf, int buf_size, H264ParamSets *ps, |
418 |
|
|
int err_recognition, void *logctx) |
419 |
|
|
{ |
420 |
|
|
int ret; |
421 |
|
|
|
422 |
|
304 |
ret = decode_extradata_ps(buf, buf_size, ps, 1, logctx); |
423 |
✗✓✗✗
|
304 |
if (ret < 0 && !(err_recognition & AV_EF_EXPLODE)) { |
424 |
|
|
GetByteContext gbc; |
425 |
|
|
PutByteContext pbc; |
426 |
|
|
uint8_t *escaped_buf; |
427 |
|
|
int escaped_buf_size; |
428 |
|
|
|
429 |
|
|
av_log(logctx, AV_LOG_WARNING, |
430 |
|
|
"SPS decoding failure, trying again after escaping the NAL\n"); |
431 |
|
|
|
432 |
|
|
if (buf_size / 2 >= (INT16_MAX - AV_INPUT_BUFFER_PADDING_SIZE) / 3) |
433 |
|
|
return AVERROR(ERANGE); |
434 |
|
|
escaped_buf_size = buf_size * 3 / 2 + AV_INPUT_BUFFER_PADDING_SIZE; |
435 |
|
|
escaped_buf = av_mallocz(escaped_buf_size); |
436 |
|
|
if (!escaped_buf) |
437 |
|
|
return AVERROR(ENOMEM); |
438 |
|
|
|
439 |
|
|
bytestream2_init(&gbc, buf, buf_size); |
440 |
|
|
bytestream2_init_writer(&pbc, escaped_buf, escaped_buf_size); |
441 |
|
|
|
442 |
|
|
while (bytestream2_get_bytes_left(&gbc)) { |
443 |
|
|
if (bytestream2_get_bytes_left(&gbc) >= 3 && |
444 |
|
|
bytestream2_peek_be24(&gbc) <= 3) { |
445 |
|
|
bytestream2_put_be24(&pbc, 3); |
446 |
|
|
bytestream2_skip(&gbc, 2); |
447 |
|
|
} else |
448 |
|
|
bytestream2_put_byte(&pbc, bytestream2_get_byte(&gbc)); |
449 |
|
|
} |
450 |
|
|
|
451 |
|
|
escaped_buf_size = bytestream2_tell_p(&pbc); |
452 |
|
|
AV_WB16(escaped_buf, escaped_buf_size - 2); |
453 |
|
|
|
454 |
|
|
(void)decode_extradata_ps(escaped_buf, escaped_buf_size, ps, 1, logctx); |
455 |
|
|
// lorex.mp4 decodes ok even with extradata decoding failing |
456 |
|
|
av_freep(&escaped_buf); |
457 |
|
|
} |
458 |
|
|
|
459 |
|
304 |
return 0; |
460 |
|
|
} |
461 |
|
|
|
462 |
|
363 |
int ff_h264_decode_extradata(const uint8_t *data, int size, H264ParamSets *ps, |
463 |
|
|
int *is_avc, int *nal_length_size, |
464 |
|
|
int err_recognition, void *logctx) |
465 |
|
|
{ |
466 |
|
|
int ret; |
467 |
|
|
|
468 |
✓✗✗✓
|
363 |
if (!data || size <= 0) |
469 |
|
|
return -1; |
470 |
|
|
|
471 |
✓✓ |
363 |
if (data[0] == 1) { |
472 |
|
|
int i, cnt, nalsize; |
473 |
|
155 |
const uint8_t *p = data; |
474 |
|
|
|
475 |
|
155 |
*is_avc = 1; |
476 |
|
|
|
477 |
✗✓ |
155 |
if (size < 7) { |
478 |
|
|
av_log(logctx, AV_LOG_ERROR, "avcC %d too short\n", size); |
479 |
|
|
return AVERROR_INVALIDDATA; |
480 |
|
|
} |
481 |
|
|
|
482 |
|
|
// Decode sps from avcC |
483 |
|
155 |
cnt = *(p + 5) & 0x1f; // Number of sps |
484 |
|
155 |
p += 6; |
485 |
✓✓ |
307 |
for (i = 0; i < cnt; i++) { |
486 |
|
152 |
nalsize = AV_RB16(p) + 2; |
487 |
✗✓ |
152 |
if (nalsize > size - (p - data)) |
488 |
|
|
return AVERROR_INVALIDDATA; |
489 |
|
152 |
ret = decode_extradata_ps_mp4(p, nalsize, ps, err_recognition, logctx); |
490 |
✗✓ |
152 |
if (ret < 0) { |
491 |
|
|
av_log(logctx, AV_LOG_ERROR, |
492 |
|
|
"Decoding sps %d from avcC failed\n", i); |
493 |
|
|
return ret; |
494 |
|
|
} |
495 |
|
152 |
p += nalsize; |
496 |
|
|
} |
497 |
|
|
// Decode pps from avcC |
498 |
|
155 |
cnt = *(p++); // Number of pps |
499 |
✓✓ |
307 |
for (i = 0; i < cnt; i++) { |
500 |
|
152 |
nalsize = AV_RB16(p) + 2; |
501 |
✗✓ |
152 |
if (nalsize > size - (p - data)) |
502 |
|
|
return AVERROR_INVALIDDATA; |
503 |
|
152 |
ret = decode_extradata_ps_mp4(p, nalsize, ps, err_recognition, logctx); |
504 |
✗✓ |
152 |
if (ret < 0) { |
505 |
|
|
av_log(logctx, AV_LOG_ERROR, |
506 |
|
|
"Decoding pps %d from avcC failed\n", i); |
507 |
|
|
return ret; |
508 |
|
|
} |
509 |
|
152 |
p += nalsize; |
510 |
|
|
} |
511 |
|
|
// Store right nal length size that will be used to parse all other nals |
512 |
|
155 |
*nal_length_size = (data[4] & 0x03) + 1; |
513 |
|
|
} else { |
514 |
|
208 |
*is_avc = 0; |
515 |
|
208 |
ret = decode_extradata_ps(data, size, ps, 0, logctx); |
516 |
✗✓ |
208 |
if (ret < 0) |
517 |
|
|
return ret; |
518 |
|
|
} |
519 |
|
363 |
return size; |
520 |
|
|
} |
521 |
|
|
|
522 |
|
|
/** |
523 |
|
|
* Compute profile from profile_idc and constraint_set?_flags. |
524 |
|
|
* |
525 |
|
|
* @param sps SPS |
526 |
|
|
* |
527 |
|
|
* @return profile as defined by FF_PROFILE_H264_* |
528 |
|
|
*/ |
529 |
|
52239 |
int ff_h264_get_profile(const SPS *sps) |
530 |
|
|
{ |
531 |
|
52239 |
int profile = sps->profile_idc; |
532 |
|
|
|
533 |
✓✓✓ |
52239 |
switch (sps->profile_idc) { |
534 |
|
13630 |
case FF_PROFILE_H264_BASELINE: |
535 |
|
|
// constraint_set1_flag set to 1 |
536 |
|
13630 |
profile |= (sps->constraint_set_flags & 1 << 1) ? FF_PROFILE_H264_CONSTRAINED : 0; |
537 |
|
13630 |
break; |
538 |
|
1797 |
case FF_PROFILE_H264_HIGH_10: |
539 |
|
|
case FF_PROFILE_H264_HIGH_422: |
540 |
|
|
case FF_PROFILE_H264_HIGH_444_PREDICTIVE: |
541 |
|
|
// constraint_set3_flag set to 1 |
542 |
|
1797 |
profile |= (sps->constraint_set_flags & 1 << 3) ? FF_PROFILE_H264_INTRA : 0; |
543 |
|
1797 |
break; |
544 |
|
|
} |
545 |
|
|
|
546 |
|
52239 |
return profile; |
547 |
|
|
} |