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
21 /*****************************************************************************/
22 /* */
23 /* File Name : ih264d_vui.c */
24 /* */
25 /* Description : This file contains routines to parse VUI NAL's */
26 /* */
27 /* List of Functions : <List the functions defined in this file> */
28 /* */
29 /* Issues / Problems : None */
30 /* */
31 /* Revision History : */
32 /* */
33 /* DD MM YYYY Author(s) Changes (Describe the changes made) */
34 /* 25 05 2005 NS Draft */
35 /* */
36 /*****************************************************************************/
37
38 #include "ih264_typedefs.h"
39 #include "ih264_macros.h"
40 #include "ih264_platform_macros.h"
41 #include "ih264d_vui.h"
42 #include "ih264d_bitstrm.h"
43 #include "ih264d_parse_cavlc.h"
44 #include "ih264d_structs.h"
45 #include "ih264d_error_handler.h"
46
47 /*****************************************************************************/
48 /* */
49 /* Function Name : ih264d_parse_hrd_parametres */
50 /* */
51 /* Description : This function parses hrd_t parametres */
52 /* Inputs : ps_hrd pointer to HRD params */
53 /* ps_bitstrm Bitstream */
54 /* Globals : None */
55 /* Processing : Parses HRD params */
56 /* Outputs : None */
57 /* Returns : None */
58 /* */
59 /* Issues : None */
60 /* */
61 /* Revision History: */
62 /* */
63 /* DD MM YYYY Author(s) Changes (Describe the changes made) */
64 /* 06 05 2002 NS Draft */
65 /* */
66 /*****************************************************************************/
67
ih264d_parse_hrd_parametres(hrd_t * ps_hrd,dec_bit_stream_t * ps_bitstrm)68 WORD32 ih264d_parse_hrd_parametres(hrd_t *ps_hrd,
69 dec_bit_stream_t *ps_bitstrm)
70 {
71 UWORD8 u1_index;
72 UWORD32 *pu4_bitstrm_ofst = &ps_bitstrm->u4_ofst;
73 UWORD32 *pu4_bitstrm_buf = ps_bitstrm->pu4_buffer;
74
75 ps_hrd->u4_cpb_cnt = 1
76 + ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
77 if(ps_hrd->u4_cpb_cnt > 31)
78 return ERROR_INV_SPS_PPS_T;
79 ps_hrd->u1_bit_rate_scale = ih264d_get_bits_h264(ps_bitstrm, 4);
80 ps_hrd->u1_cpb_size_scale = ih264d_get_bits_h264(ps_bitstrm, 4);
81
82 for(u1_index = 0; u1_index < (UWORD8)ps_hrd->u4_cpb_cnt; u1_index++)
83 {
84 ps_hrd->u4_bit_rate[u1_index] = 1
85 + ih264d_uev(pu4_bitstrm_ofst,
86 pu4_bitstrm_buf);
87 ps_hrd->u4_cpb_size[u1_index] = 1
88 + ih264d_uev(pu4_bitstrm_ofst,
89 pu4_bitstrm_buf);
90 ps_hrd->u1_cbr_flag[u1_index] = ih264d_get_bits_h264(ps_bitstrm, 1);
91 }
92
93 ps_hrd->u1_initial_cpb_removal_delay = 1
94 + ih264d_get_bits_h264(ps_bitstrm, 5);
95 ps_hrd->u1_cpb_removal_delay_length = 1
96 + ih264d_get_bits_h264(ps_bitstrm, 5);
97 ps_hrd->u1_dpb_output_delay_length = 1
98 + ih264d_get_bits_h264(ps_bitstrm, 5);
99 ps_hrd->u1_time_offset_length = ih264d_get_bits_h264(ps_bitstrm, 5);
100
101 return OK;
102 }
103
104 /*****************************************************************************/
105 /* */
106 /* Function Name : ih264d_parse_vui_parametres */
107 /* */
108 /* Description : This function parses VUI NALs. */
109 /* Inputs : ps_vu4 pointer to VUI params */
110 /* ps_bitstrm Bitstream */
111 /* Globals : None */
112 /* Processing : Parses VUI NAL's units and stores the info */
113 /* Outputs : None */
114 /* Returns : None */
115 /* */
116 /* Issues : None */
117 /* */
118 /* Revision History: */
119 /* */
120 /* DD MM YYYY Author(s) Changes (Describe the changes made) */
121 /* 06 05 2002 NS Draft */
122 /* */
123 /*****************************************************************************/
124
ih264d_parse_vui_parametres(vui_t * ps_vu4,dec_bit_stream_t * ps_bitstrm)125 WORD32 ih264d_parse_vui_parametres(vui_t *ps_vu4,
126 dec_bit_stream_t *ps_bitstrm)
127 {
128 UWORD8 u4_bits;
129 UWORD32 *pu4_bitstrm_ofst = &ps_bitstrm->u4_ofst;
130 UWORD32 *pu4_bitstrm_buf = ps_bitstrm->pu4_buffer;
131 WORD32 ret;
132
133 u4_bits = ih264d_get_bits_h264(ps_bitstrm, 1);
134 if(u4_bits)
135 {
136 u4_bits = ih264d_get_bits_h264(ps_bitstrm, 8);
137 ps_vu4->u1_aspect_ratio_idc = (UWORD8)u4_bits;
138 if(VUI_EXTENDED_SAR == u4_bits)
139 {
140 ps_vu4->u2_sar_width = ih264d_get_bits_h264(ps_bitstrm, 16);
141 ps_vu4->u2_sar_height = ih264d_get_bits_h264(ps_bitstrm, 16);
142 }
143 }
144
145 u4_bits = ih264d_get_bits_h264(ps_bitstrm, 1);
146 if(u4_bits)
147 {
148 ps_vu4->u1_overscan_appropriate_flag = ih264d_get_bits_h264(
149 ps_bitstrm, 1);
150 }
151 u4_bits = ih264d_get_bits_h264(ps_bitstrm, 1);
152 if(u4_bits)
153 {
154 ps_vu4->u1_video_format = ih264d_get_bits_h264(ps_bitstrm, 3);
155 ps_vu4->u1_video_full_range_flag = ih264d_get_bits_h264(ps_bitstrm,
156 1);
157 u4_bits = ih264d_get_bits_h264(ps_bitstrm, 1);
158 if(u4_bits)
159 {
160 ps_vu4->u1_colour_primaries = ih264d_get_bits_h264(ps_bitstrm,
161 8);
162 ps_vu4->u1_tfr_chars = ih264d_get_bits_h264(ps_bitstrm, 8);
163 ps_vu4->u1_matrix_coeffs = ih264d_get_bits_h264(ps_bitstrm, 8);
164 }
165 }
166
167 u4_bits = ih264d_get_bits_h264(ps_bitstrm, 1);
168 if(u4_bits)
169 {
170 ps_vu4->u1_cr_top_field = ih264d_uev(pu4_bitstrm_ofst,
171 pu4_bitstrm_buf);
172 ps_vu4->u1_cr_bottom_field = ih264d_uev(pu4_bitstrm_ofst,
173 pu4_bitstrm_buf);
174 }
175
176 u4_bits = ih264d_get_bits_h264(ps_bitstrm, 1);
177 if(u4_bits)
178 {
179 ps_vu4->u4_num_units_in_tick = ih264d_get_bits_h264(ps_bitstrm, 32);
180 ps_vu4->u4_time_scale = ih264d_get_bits_h264(ps_bitstrm, 32);
181 ps_vu4->u1_fixed_frame_rate_flag = ih264d_get_bits_h264(ps_bitstrm,
182 1);
183 }
184
185 u4_bits = ih264d_get_bits_h264(ps_bitstrm, 1);
186 ps_vu4->u1_nal_hrd_params_present = u4_bits;
187 if(u4_bits)
188 {
189 ret = ih264d_parse_hrd_parametres(&ps_vu4->s_nal_hrd, ps_bitstrm);
190 if(ret != OK)
191 return ret;
192 }
193 u4_bits = ih264d_get_bits_h264(ps_bitstrm, 1);
194 ps_vu4->u1_vcl_hrd_params_present = u4_bits;
195 if(u4_bits)
196 {
197 ret = ih264d_parse_hrd_parametres(&ps_vu4->s_vcl_hrd, ps_bitstrm);
198 if(ret != OK)
199 return ret;
200 }
201
202 if(ps_vu4->u1_nal_hrd_params_present || u4_bits)
203 {
204 ps_vu4->u1_low_delay_hrd_flag = ih264d_get_bits_h264(ps_bitstrm, 1);
205 }
206 ps_vu4->u1_pic_struct_present_flag = ih264d_get_bits_h264(ps_bitstrm, 1);
207
208 ps_vu4->u1_bitstream_restriction_flag = ih264d_get_bits_h264(ps_bitstrm, 1);
209
210 if(ps_vu4->u1_bitstream_restriction_flag)
211 {
212 ps_vu4->u1_mv_over_pic_boundaries_flag = ih264d_get_bits_h264(
213 ps_bitstrm, 1);
214 ps_vu4->u4_max_bytes_per_pic_denom = ih264d_uev(pu4_bitstrm_ofst,
215 pu4_bitstrm_buf);
216 ps_vu4->u4_max_bits_per_mb_denom = ih264d_uev(pu4_bitstrm_ofst,
217 pu4_bitstrm_buf);
218 ps_vu4->u4_log2_max_mv_length_horz = ih264d_uev(pu4_bitstrm_ofst,
219 pu4_bitstrm_buf);
220 ps_vu4->u4_log2_max_mv_length_vert = ih264d_uev(pu4_bitstrm_ofst,
221 pu4_bitstrm_buf);
222 ps_vu4->u4_num_reorder_frames = ih264d_uev(pu4_bitstrm_ofst,
223 pu4_bitstrm_buf);
224 ps_vu4->u4_max_dec_frame_buffering = ih264d_uev(pu4_bitstrm_ofst,
225 pu4_bitstrm_buf);
226 }
227 else
228 {
229 /* Setting this to a large value if not present */
230 ps_vu4->u4_num_reorder_frames = 64;
231 ps_vu4->u4_max_dec_frame_buffering = 64;
232 }
233
234 return OK;
235 }
236