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_sei.c */
24 /* */
25 /* Description : This file contains routines to parse SEI 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_sei.h"
42 #include "ih264d_bitstrm.h"
43 #include "ih264d_structs.h"
44 #include "ih264d_error_handler.h"
45 #include "ih264d_vui.h"
46 #include "ih264d_parse_cavlc.h"
47 #include "ih264d_defs.h"
48
49 /*****************************************************************************/
50 /* */
51 /* Function Name : ih264d_parse_buffering_period */
52 /* */
53 /* Description : This function parses SEI message buffering_period */
54 /* Inputs : ps_buf_prd pointer to struct buf_period_t */
55 /* ps_bitstrm Bitstream */
56 /* Globals : None */
57 /* Processing : Parses SEI payload buffering period. */
58 /* Outputs : None */
59 /* Returns : None */
60 /* */
61 /* Issues : Not implemented fully */
62 /* */
63 /* Revision History: */
64 /* */
65 /* DD MM YYYY Author(s) Changes (Describe the changes made) */
66 /* 06 05 2002 NS Draft */
67 /* */
68 /*****************************************************************************/
69
ih264d_parse_buffering_period(buf_period_t * ps_buf_prd,dec_bit_stream_t * ps_bitstrm,dec_struct_t * ps_dec)70 WORD32 ih264d_parse_buffering_period(buf_period_t *ps_buf_prd,
71 dec_bit_stream_t *ps_bitstrm,
72 dec_struct_t *ps_dec)
73 {
74 UWORD8 u1_seq_parameter_set_id;
75 dec_seq_params_t *ps_seq;
76 UWORD8 u1_nal_hrd_present, u1_vcl_hrd_present;
77 UWORD32 i;
78 UWORD32 *pu4_bitstrm_ofst = &ps_bitstrm->u4_ofst;
79 UWORD32 *pu4_bitstrm_buf = ps_bitstrm->pu4_buffer;
80 UNUSED(ps_buf_prd);
81 u1_seq_parameter_set_id = ih264d_uev(pu4_bitstrm_ofst,
82 pu4_bitstrm_buf);
83 if(u1_seq_parameter_set_id >= MAX_NUM_SEQ_PARAMS)
84 return ERROR_INVALID_SEQ_PARAM;
85 ps_seq = &ps_dec->ps_sps[u1_seq_parameter_set_id];
86 if(TRUE != ps_seq->u1_is_valid)
87 return (-1);
88
89 ps_dec->ps_sei->u1_seq_param_set_id = u1_seq_parameter_set_id;
90 ps_dec->ps_cur_sps = ps_seq;
91 if(FALSE == ps_seq->u1_is_valid)
92 return ERROR_INVALID_SEQ_PARAM;
93 if(1 == ps_seq->u1_vui_parameters_present_flag)
94 {
95 u1_nal_hrd_present = ps_seq->s_vui.u1_nal_hrd_params_present;
96 if(u1_nal_hrd_present)
97 {
98 for(i = 0; i < ps_seq->s_vui.s_nal_hrd.u4_cpb_cnt; i++)
99 {
100 ih264d_get_bits_h264(
101 ps_bitstrm,
102 ps_seq->s_vui.s_nal_hrd.u1_initial_cpb_removal_delay);
103 ih264d_get_bits_h264(
104 ps_bitstrm,
105 ps_seq->s_vui.s_nal_hrd.u1_initial_cpb_removal_delay);
106 }
107 }
108
109 u1_vcl_hrd_present = ps_seq->s_vui.u1_vcl_hrd_params_present;
110 if(u1_vcl_hrd_present)
111 {
112 for(i = 0; i < ps_seq->s_vui.s_vcl_hrd.u4_cpb_cnt; i++)
113 {
114 ih264d_get_bits_h264(
115 ps_bitstrm,
116 ps_seq->s_vui.s_vcl_hrd.u1_initial_cpb_removal_delay);
117 ih264d_get_bits_h264(
118 ps_bitstrm,
119 ps_seq->s_vui.s_vcl_hrd.u1_initial_cpb_removal_delay);
120 }
121 }
122 }
123 return OK;
124 }
125
126 /*****************************************************************************/
127 /* */
128 /* Function Name : ih264d_parse_pic_timing */
129 /* */
130 /* Description : This function parses SEI message pic_timing */
131 /* Inputs : ps_bitstrm Bitstream */
132 /* ps_dec Poniter decoder context */
133 /* ui4_payload_size pay load i4_size */
134 /* Globals : None */
135 /* Processing : Parses SEI payload picture timing */
136 /* Outputs : None */
137 /* Returns : None */
138 /* */
139 /* Issues : Not implemented fully */
140 /* */
141 /* Revision History: */
142 /* */
143 /* DD MM YYYY Author(s) Changes (Describe the changes made) */
144 /* 06 05 2002 NS Draft */
145 /* */
146 /*****************************************************************************/
ih264d_parse_pic_timing(dec_bit_stream_t * ps_bitstrm,dec_struct_t * ps_dec,UWORD32 ui4_payload_size)147 WORD32 ih264d_parse_pic_timing(dec_bit_stream_t *ps_bitstrm,
148 dec_struct_t *ps_dec,
149 UWORD32 ui4_payload_size)
150 {
151 sei *ps_sei;
152 vui_t *ps_vu4;
153 UWORD8 u1_cpb_dpb_present;
154 UWORD8 u1_pic_struct_present_flag;
155 UWORD32 u4_start_offset, u4_bits_consumed;
156 UWORD8 u1_cpb_removal_delay_length, u1_dpb_output_delay_length;
157
158 ps_sei = (sei *)ps_dec->ps_sei;
159 ps_vu4 = &ps_dec->ps_cur_sps->s_vui;
160
161 u1_cpb_dpb_present = ps_vu4->u1_vcl_hrd_params_present
162 + ps_vu4->u1_nal_hrd_params_present;
163
164 if(ps_vu4->u1_vcl_hrd_params_present)
165 {
166 u1_cpb_removal_delay_length =
167 ps_vu4->s_vcl_hrd.u1_cpb_removal_delay_length;
168 u1_dpb_output_delay_length =
169 ps_vu4->s_vcl_hrd.u1_dpb_output_delay_length;
170 }
171 else if(ps_vu4->u1_nal_hrd_params_present)
172 {
173 u1_cpb_removal_delay_length =
174 ps_vu4->s_nal_hrd.u1_cpb_removal_delay_length;
175 u1_dpb_output_delay_length =
176 ps_vu4->s_nal_hrd.u1_dpb_output_delay_length;
177 }
178 else
179 {
180 u1_cpb_removal_delay_length = 24;
181 u1_dpb_output_delay_length = 24;
182
183 }
184
185 u4_start_offset = ps_bitstrm->u4_ofst;
186 if(u1_cpb_dpb_present)
187 {
188 ih264d_get_bits_h264(ps_bitstrm, u1_cpb_removal_delay_length);
189 ih264d_get_bits_h264(ps_bitstrm, u1_dpb_output_delay_length);
190 }
191
192 u1_pic_struct_present_flag = ps_vu4->u1_pic_struct_present_flag;
193 if(u1_pic_struct_present_flag)
194 {
195 ps_sei->u1_pic_struct = ih264d_get_bits_h264(ps_bitstrm, 4);
196 ps_dec->u1_pic_struct_copy = ps_sei->u1_pic_struct;
197 ps_sei->u1_is_valid = 1;
198 }
199 u4_bits_consumed = ps_bitstrm->u4_ofst - u4_start_offset;
200 ih264d_flush_bits_h264(ps_bitstrm,
201 (ui4_payload_size << 3) - u4_bits_consumed);
202
203 return (0);
204 }
205
206 /*****************************************************************************/
207 /* */
208 /* Function Name : ih264d_parse_recovery_point */
209 /* */
210 /* Description : This function parses SEI message recovery point */
211 /* Inputs : ps_bitstrm Bitstream */
212 /* ps_dec Poniter decoder context */
213 /* ui4_payload_size pay load i4_size */
214 /* Globals : None */
215 /* Processing : Parses SEI payload picture timing */
216 /* Outputs : None */
217 /* Returns : None */
218 /* */
219 /* Issues : Not implemented fully */
220 /* */
221 /* Revision History: */
222 /* */
223 /* DD MM YYYY Author(s) Changes (Describe the changes made) */
224 /* 06 05 2002 NS Draft */
225 /* */
226 /*****************************************************************************/
ih264d_parse_recovery_point(dec_bit_stream_t * ps_bitstrm,dec_struct_t * ps_dec,UWORD32 ui4_payload_size)227 WORD32 ih264d_parse_recovery_point(dec_bit_stream_t *ps_bitstrm,
228 dec_struct_t *ps_dec,
229 UWORD32 ui4_payload_size)
230 {
231 sei *ps_sei = ps_dec->ps_sei;
232 dec_err_status_t *ps_err = ps_dec->ps_dec_err_status;
233 UWORD32 *pu4_bitstrm_ofst = &ps_bitstrm->u4_ofst;
234 UWORD32 *pu4_bitstrm_buf = ps_bitstrm->pu4_buffer;
235 UNUSED(ui4_payload_size);
236 ps_sei->u2_recovery_frame_cnt = ih264d_uev(pu4_bitstrm_ofst,
237 pu4_bitstrm_buf);
238 ps_err->u4_frm_sei_sync = ps_err->u4_cur_frm
239 + ps_sei->u2_recovery_frame_cnt;
240 ps_sei->u1_exact_match_flag = ih264d_get_bit_h264(ps_bitstrm);
241 ps_sei->u1_broken_link_flag = ih264d_get_bit_h264(ps_bitstrm);
242 ps_sei->u1_changing_slice_grp_idc = ih264d_get_bits_h264(ps_bitstrm, 2);
243
244 return (0);
245 }
246
247 /*****************************************************************************/
248 /* */
249 /* Function Name : ih264d_parse_sei_payload */
250 /* */
251 /* Description : This function parses SEI pay loads. Currently it's */
252 /* implemented partially. */
253 /* Inputs : ps_bitstrm Bitstream */
254 /* ui4_payload_type SEI payload type */
255 /* ui4_payload_size SEI payload i4_size */
256 /* Globals : None */
257 /* Processing : Parses SEI payloads units and stores the info */
258 /* Outputs : None */
259 /* Returns : None */
260 /* */
261 /* Issues : Not implemented fully */
262 /* */
263 /* Revision History: */
264 /* */
265 /* DD MM YYYY Author(s) Changes (Describe the changes made) */
266 /* 06 05 2002 NS Draft */
267 /* */
268 /*****************************************************************************/
269
ih264d_parse_sei_payload(dec_bit_stream_t * ps_bitstrm,UWORD32 ui4_payload_type,UWORD32 ui4_payload_size,dec_struct_t * ps_dec)270 WORD32 ih264d_parse_sei_payload(dec_bit_stream_t *ps_bitstrm,
271 UWORD32 ui4_payload_type,
272 UWORD32 ui4_payload_size,
273 dec_struct_t *ps_dec)
274 {
275 sei *ps_sei;
276 WORD32 i4_status = 0;
277 ps_sei = (sei *)ps_dec->ps_sei;
278 switch(ui4_payload_type)
279 {
280 case SEI_BUF_PERIOD:
281
282 i4_status = ih264d_parse_buffering_period(&ps_sei->s_buf_period,
283 ps_bitstrm, ps_dec);
284 /*if(i4_status != OK)
285 return i4_status;*/
286 break;
287 case SEI_PIC_TIMING:
288 if(NULL == ps_dec->ps_cur_sps)
289 ih264d_flush_bits_h264(ps_bitstrm, (ui4_payload_size << 3));
290 else
291 ih264d_parse_pic_timing(ps_bitstrm, ps_dec,
292 ui4_payload_size);
293 break;
294 case SEI_RECOVERY_PT:
295 ih264d_parse_recovery_point(ps_bitstrm, ps_dec,
296 ui4_payload_size);
297 break;
298 default:
299 ih264d_flush_bits_h264(ps_bitstrm, (ui4_payload_size << 3));
300 break;
301 }
302 return (i4_status);
303 }
304
305 /*****************************************************************************/
306 /* */
307 /* Function Name : ih264d_parse_sei_message */
308 /* */
309 /* Description : This function is parses and decode SEI. Currently it's */
310 /* not implemented fully. */
311 /* Inputs : ps_dec Decoder parameters */
312 /* ps_bitstrm Bitstream */
313 /* Globals : None */
314 /* Processing : Parses SEI NAL units and stores the info */
315 /* Outputs : None */
316 /* Returns : None */
317 /* */
318 /* Issues : Not implemented fully */
319 /* */
320 /* Revision History: */
321 /* */
322 /* DD MM YYYY Author(s) Changes (Describe the changes made) */
323 /* 06 05 2002 NS Draft */
324 /* */
325 /*****************************************************************************/
326
ih264d_parse_sei_message(dec_struct_t * ps_dec,dec_bit_stream_t * ps_bitstrm)327 WORD32 ih264d_parse_sei_message(dec_struct_t *ps_dec,
328 dec_bit_stream_t *ps_bitstrm)
329 {
330 UWORD32 ui4_payload_type, ui4_payload_size;
331 UWORD32 u4_bits;
332 WORD32 i4_status = 0;
333
334 do
335 {
336 ui4_payload_type = 0;
337
338 u4_bits = ih264d_get_bits_h264(ps_bitstrm, 8);
339 while(0xff == u4_bits && !EXCEED_OFFSET(ps_bitstrm))
340 {
341 u4_bits = ih264d_get_bits_h264(ps_bitstrm, 8);
342 ui4_payload_type += 255;
343 }
344 ui4_payload_type += u4_bits;
345
346 ui4_payload_size = 0;
347 u4_bits = ih264d_get_bits_h264(ps_bitstrm, 8);
348 while(0xff == u4_bits && !EXCEED_OFFSET(ps_bitstrm))
349 {
350 u4_bits = ih264d_get_bits_h264(ps_bitstrm, 8);
351 ui4_payload_size += 255;
352 }
353 ui4_payload_size += u4_bits;
354
355 i4_status = ih264d_parse_sei_payload(ps_bitstrm, ui4_payload_type,
356 ui4_payload_size, ps_dec);
357 if(i4_status == -1)
358 {
359 i4_status = 0;
360 break;
361 }
362
363 if(i4_status != OK)
364 return i4_status;
365
366 if(ih264d_check_byte_aligned(ps_bitstrm) == 0)
367 {
368 u4_bits = ih264d_get_bit_h264(ps_bitstrm);
369 if(0 == u4_bits)
370 {
371 H264_DEC_DEBUG_PRINT("\nError in parsing SEI message");
372 }
373 while(0 == ih264d_check_byte_aligned(ps_bitstrm)
374 && !EXCEED_OFFSET(ps_bitstrm))
375 {
376 u4_bits = ih264d_get_bit_h264(ps_bitstrm);
377 if(u4_bits)
378 {
379 H264_DEC_DEBUG_PRINT("\nError in parsing SEI message");
380 }
381 }
382 }
383 }
384 while(ps_bitstrm->u4_ofst < ps_bitstrm->u4_max_ofst);
385 return (i4_status);
386 }
387
388