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gerrit-public.fairphone.software / platform / external / libavc / 80f638941c03e2bf1d68ceba9e639ddb6dd04751 / . / decoder / ih264d_quant_scaling.c
blob: fa9aeb50f8540e461ea8ffdfeb5f81522bcd5489 [file] [log] [blame]
Hamsalekha S8d3d3032015-03-13 21:24:58 +0530[diff] [blame]1/******************************************************************************
2 *
3 * Copyright (C) 2015 The Android Open Source Project
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 *****************************************************************************
18 * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
19*/
20#include "ih264_typedefs.h"
21#include "ih264_macros.h"
22#include "ih264_platform_macros.h"
23#include "ih264d_bitstrm.h"
24#include "ih264d_structs.h"
25#include "ih264d_parse_cavlc.h"
26#include "ih264d_defs.h"
27#include "ih264d_defs.h"
28#include "ih264d_defs.h"
29
30#include "ih264d_parse_slice.h"
31#include "ih264d_tables.h"
32#include "ih264d_utils.h"
33#include "ih264d_nal.h"
34#include "ih264d_deblocking.h"
35
36#include "ih264d_mem_request.h"
37#include "ih264d_debug.h"
38
39#include "ih264d_error_handler.h"
40#include "ih264d_mb_utils.h"
41#include "ih264d_sei.h"
42#include "ih264d_vui.h"
43#include "ih264d_tables.h"
44
45#define IDCT_BLOCK_WIDTH8X8 8
46
47void ih264d_scaling_list(WORD16 *pi2_scaling_list,
48 WORD32 i4_size_of_scalinglist,
49 UWORD8 *pu1_use_default_scaling_matrix_flag,
50 dec_bit_stream_t *ps_bitstrm)
51{
52 WORD32 i4_j, i4_delta_scale, i4_lastScale = 8, i4_nextScale = 8;
53 UWORD32 *pu4_bitstrm_buf = ps_bitstrm->pu4_buffer;
54 UWORD32 *pu4_bitstrm_ofst = &ps_bitstrm->u4_ofst;
55
56 *pu1_use_default_scaling_matrix_flag = 0;
57
58 for(i4_j = 0; i4_j < i4_size_of_scalinglist; i4_j++)
59 {
60 if(i4_nextScale != 0)
61 {
62 i4_delta_scale = ih264d_sev(pu4_bitstrm_ofst,
63 pu4_bitstrm_buf);
64
65 i4_nextScale = ((i4_lastScale + i4_delta_scale + 256) & 0xff);
66
67 *pu1_use_default_scaling_matrix_flag = ((i4_j == 0)
68 && (i4_nextScale == 0));
69
70 }
71 pi2_scaling_list[i4_j] =
72 (i4_nextScale == 0) ? (i4_lastScale) : (i4_nextScale);
73 i4_lastScale = pi2_scaling_list[i4_j];
74 }
75}
76
77void ih264d_form_default_scaling_matrix(dec_struct_t *ps_dec)
78{
79
80 /*************************************************************************/
81 /* perform the inverse scanning for the frame and field scaling matrices */
82 /*************************************************************************/
83 {
84 UWORD8 *pu1_inv_scan;
85 WORD32 i4_i, i4_j;
86
87 pu1_inv_scan = (UWORD8 *)gau1_ih264d_inv_scan;
88
89 /* for all 4x4 matrices */
90 for(i4_i = 0; i4_i < 6; i4_i++)
91 {
92 for(i4_j = 0; i4_j < 16; i4_j++)
93 {
94 ps_dec->s_high_profile.i2_scalinglist4x4[i4_i][pu1_inv_scan[i4_j]] =
95 16;
96
97 }
98 }
99
100 /* for all 8x8 matrices */
101 for(i4_i = 0; i4_i < 2; i4_i++)
102 {
103 for(i4_j = 0; i4_j < 64; i4_j++)
104 {
105 ps_dec->s_high_profile.i2_scalinglist8x8[i4_i][gau1_ih264d_inv_scan_prog8x8_cabac[i4_j]] =
106 16;
107
108 }
109 }
110 }
111}
112
113void ih264d_form_scaling_matrix_picture(dec_seq_params_t *ps_seq,
114 dec_pic_params_t *ps_pic,
115 dec_struct_t *ps_dec)
116{
117 /* default scaling matrices */
118 WORD32 i4_i;
119
120 /* check the SPS first */
121 if(ps_seq->i4_seq_scaling_matrix_present_flag)
122 {
123 for(i4_i = 0; i4_i < 8; i4_i++)
124 {
125 if(i4_i < 6)
126 {
127 /* fall-back rule A */
128 if(!ps_seq->u1_seq_scaling_list_present_flag[i4_i])
129 {
130 if((i4_i == 0) || (i4_i == 3))
131 {
132 ps_dec->s_high_profile.pi2_scale_mat[i4_i] =
133 (i4_i == 0) ? (WORD16 *)(gai2_ih264d_default_intra4x4) : (WORD16 *)(gai2_ih264d_default_inter4x4);
134 }
135 else
136 {
137 ps_dec->s_high_profile.pi2_scale_mat[i4_i] =
138 ps_dec->s_high_profile.pi2_scale_mat[i4_i
139 - 1];
140 }
141 }
142 else
143 {
144 if(ps_seq->u1_use_default_scaling_matrix_flag[i4_i])
145 {
146 ps_dec->s_high_profile.pi2_scale_mat[i4_i] =
147 (i4_i < 3) ? (WORD16 *)(gai2_ih264d_default_intra4x4) : (WORD16 *)(gai2_ih264d_default_inter4x4);
148 }
149 else
150 {
151 ps_dec->s_high_profile.pi2_scale_mat[i4_i] =
152 ps_seq->i2_scalinglist4x4[i4_i];
153 }
154 }
155
156 }
157 else
158 {
159 /* fall-back rule A */
160 if((!ps_seq->u1_seq_scaling_list_present_flag[i4_i])
161 || (ps_seq->u1_use_default_scaling_matrix_flag[i4_i]))
162 {
163 ps_dec->s_high_profile.pi2_scale_mat[i4_i] =
164 (i4_i == 6) ? ((WORD16*)gai2_ih264d_default_intra8x8) : ((WORD16*)gai2_ih264d_default_inter8x8);
165 }
166 else
167 {
168 ps_dec->s_high_profile.pi2_scale_mat[i4_i] =
169 ps_seq->i2_scalinglist8x8[i4_i - 6];
170 }
171 }
172 }
173 }
174
175 /* checking for the PPS */
176
177 if(ps_pic->i4_pic_scaling_matrix_present_flag)
178 {
179 for(i4_i = 0; i4_i < 8; i4_i++)
180 {
181 if(i4_i < 6)
182 {
183 /* fall back rule B */
184 if(!ps_pic->u1_pic_scaling_list_present_flag[i4_i])
185 {
186 if((i4_i == 0) || (i4_i == 3))
187 {
188 if(!ps_seq->i4_seq_scaling_matrix_present_flag)
189 {
190 ps_dec->s_high_profile.pi2_scale_mat[i4_i] =
191 (i4_i == 0) ? (WORD16 *)(gai2_ih264d_default_intra4x4) : (WORD16 *)(gai2_ih264d_default_inter4x4);
192 }
193 }
194 else
195 {
196 ps_dec->s_high_profile.pi2_scale_mat[i4_i] =
197 ps_dec->s_high_profile.pi2_scale_mat[i4_i
198 - 1];
199 }
200 }
201 else
202 {
203 if(ps_pic->u1_pic_use_default_scaling_matrix_flag[i4_i])
204 {
205 ps_dec->s_high_profile.pi2_scale_mat[i4_i] =
206 (i4_i < 3) ? (WORD16 *)(gai2_ih264d_default_intra4x4) : (WORD16 *)(gai2_ih264d_default_inter4x4);
207 }
208 else
209 {
210 ps_dec->s_high_profile.pi2_scale_mat[i4_i] =
211 ps_pic->i2_pic_scalinglist4x4[i4_i];
212 }
213 }
214 }
215 else
216 {
217 if(!ps_pic->u1_pic_scaling_list_present_flag[i4_i])
218 {
219 if(!ps_seq->u1_seq_scaling_list_present_flag[i4_i])
220 {
221 ps_dec->s_high_profile.pi2_scale_mat[i4_i] =
222 (i4_i == 6) ? ((WORD16*)gai2_ih264d_default_intra8x8) : ((WORD16*)gai2_ih264d_default_inter8x8);
223 }
224 }
225 else
226 {
227 if(ps_pic->u1_pic_use_default_scaling_matrix_flag[i4_i])
228 {
229 ps_dec->s_high_profile.pi2_scale_mat[i4_i] =
230 (i4_i == 6) ? (WORD16 *)(gai2_ih264d_default_intra8x8) : (WORD16 *)(gai2_ih264d_default_inter8x8);
231 }
232 else
233 {
234 ps_dec->s_high_profile.pi2_scale_mat[i4_i] =
235 ps_pic->i2_pic_scalinglist8x8[i4_i - 6];
236 }
237 }
238 }
239 }
240 }
241
242 /*************************************************************************/
243 /* perform the inverse scanning for the frame and field scaling matrices */
244 /*************************************************************************/
245 {
246 UWORD8 *pu1_inv_scan_4x4;
247 WORD32 i4_i, i4_j;
248
249 pu1_inv_scan_4x4 = (UWORD8 *)gau1_ih264d_inv_scan;
250
251 /* for all 4x4 matrices */
252 for(i4_i = 0; i4_i < 6; i4_i++)
253 {
254 for(i4_j = 0; i4_j < 16; i4_j++)
255 {
256 ps_dec->s_high_profile.i2_scalinglist4x4[i4_i][pu1_inv_scan_4x4[i4_j]] =
257 ps_dec->s_high_profile.pi2_scale_mat[i4_i][i4_j];
258
259 }
260 }
261
262 /* for all 8x8 matrices */
263 for(i4_i = 0; i4_i < 2; i4_i++)
264 {
265 for(i4_j = 0; i4_j < 64; i4_j++)
266 {
267 ps_dec->s_high_profile.i2_scalinglist8x8[i4_i][gau1_ih264d_inv_scan_prog8x8_cabac[i4_j]] =
268 ps_dec->s_high_profile.pi2_scale_mat[i4_i + 6][i4_j];
269
270 }
271 }
272 }
273}
274