Hamsalekha S | 8d3d303 | 2015-03-13 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 | |
| 21 | /*****************************************************************************/ |
| 22 | /* File Includes */ |
| 23 | /*****************************************************************************/ |
| 24 | |
| 25 | /* System include files */ |
| 26 | #include "stdio.h" |
| 27 | #include "string.h" |
| 28 | |
| 29 | /* User include files */ |
| 30 | #include "irc_datatypes.h" |
| 31 | #include "irc_cntrl_param.h" |
| 32 | #include "irc_mem_req_and_acq.h" |
| 33 | #include "irc_picture_type.h" |
| 34 | #include "irc_trace_support.h" |
| 35 | |
| 36 | #define MAX_INTER_FRM_INT 10 |
| 37 | |
| 38 | /******************************Pic_details ************************************/ |
| 39 | typedef struct |
| 40 | { |
| 41 | /* The id sent by the codec */ |
| 42 | WORD32 i4_pic_id; |
| 43 | |
| 44 | /* The pics come in, in this order */ |
| 45 | WORD32 i4_pic_disp_order_no; |
| 46 | |
| 47 | /* I,P,B */ |
| 48 | picture_type_e e_pic_type; |
| 49 | |
| 50 | } pic_details_t; |
| 51 | |
| 52 | /**************************Pic_handling structure *****************************/ |
| 53 | typedef struct pic_handling_t |
| 54 | { |
| 55 | /*************************************************************************** |
| 56 | * Inputs from the codec |
| 57 | **************************************************************************/ |
| 58 | |
| 59 | /* Number of frames after which an I frame will repeat in display order */ |
| 60 | WORD32 i4_intra_frm_int; |
| 61 | |
| 62 | /* (num_b_pics_in_subgop + 1) */ |
| 63 | WORD32 i4_inter_frm_int; |
| 64 | |
| 65 | /* After these many buffered frames, the pics are encoded */ |
| 66 | WORD32 i4_max_inter_frm_int; |
| 67 | |
| 68 | /* OPEN or CLOSED */ |
| 69 | WORD32 i4_is_gop_closed; |
| 70 | |
| 71 | /* The pic stack */ |
| 72 | /* Stack used to store the input pics in encode order */ |
| 73 | pic_details_t as_pic_stack[MAX_INTER_FRM_INT + 2]; |
| 74 | |
| 75 | /*************************************************************************** |
| 76 | * Counters |
| 77 | **************************************************************************/ |
| 78 | |
| 79 | /* Decides whether a B or ref pic */ |
| 80 | WORD32 i4_buf_pic_no; |
| 81 | |
| 82 | /* Current pic's number in displayed, and gets reset after an I-frm */ |
| 83 | WORD32 i4_pic_disp_order_no; |
| 84 | |
| 85 | /* Number of P frms that have come, in the current gop, so far */ |
| 86 | WORD32 i4_p_count_in_gop; |
| 87 | |
| 88 | /* Number of B frms that have come, in the current gop, so far */ |
| 89 | WORD32 i4_b_count_in_gop; |
| 90 | |
| 91 | /* Number of B frms that have come, in the current subgop, so far */ |
| 92 | WORD32 i4_b_count_in_subgop; |
| 93 | |
| 94 | /*************************************************************************** |
| 95 | * Indices to the pic stack (Since we store the pics in the encode order, |
| 96 | * these vars are modified to meet that) |
| 97 | **************************************************************************/ |
| 98 | |
| 99 | /* B_PIC index */ |
| 100 | WORD32 i4_b_pic_idx; |
| 101 | |
| 102 | /* I,P PIC index */ |
| 103 | WORD32 i4_ref_pic_idx; |
| 104 | |
| 105 | /*************************************************************************** |
| 106 | * Variables operating on the input pics |
| 107 | **************************************************************************/ |
| 108 | |
| 109 | /* Flag denoting whether it's the first gop or not */ |
| 110 | WORD32 i4_is_first_gop; |
| 111 | |
| 112 | /* Number of B_PICs in an incomplete subgop */ |
| 113 | WORD32 i4_b_in_incomp_subgop; |
| 114 | |
| 115 | /* In CLOSED_GOPs, even if inter_frm_int > 1, there can be 2 continous |
| 116 | * P_PICs at the GOP end. This takes values of 0 or 1 */ |
| 117 | WORD32 i4_extra_p; |
| 118 | |
| 119 | /*************************************************************************** |
| 120 | * Arrays storing the number of frms in the gop |
| 121 | **************************************************************************/ |
| 122 | |
| 123 | /* In the steady state, what's the pic distribution in display order */ |
| 124 | WORD32 i4_frms_in_gop[MAX_PIC_TYPE]; |
| 125 | |
| 126 | /* |
| 127 | * In case of a change in inter frm int call, the pic distribution in |
| 128 | * that gop in display order |
| 129 | */ |
| 130 | WORD32 i4_frms_in_cur_gop[MAX_PIC_TYPE]; |
| 131 | |
| 132 | /* |
| 133 | * This is used to denote the number of frms remaining to be encoded in the |
| 134 | * current gop |
| 135 | */ |
| 136 | WORD32 i4_rem_frms_in_gop[MAX_PIC_TYPE]; |
| 137 | |
| 138 | /*************************************************************************** |
| 139 | * Variables operating on the output pics |
| 140 | **************************************************************************/ |
| 141 | |
| 142 | /* Counts the frms encoded in a gop */ |
| 143 | WORD32 i4_coded_pic_no; |
| 144 | |
| 145 | /* Counts from the start of stack to the end repeatedly */ |
| 146 | WORD32 i4_stack_count; |
| 147 | |
| 148 | /*************************************************************************** |
| 149 | * Tracking a change in the inputs from the codec |
| 150 | **************************************************************************/ |
| 151 | |
| 152 | /* A flag that is set when the codec calls for a change in inter_frm_int */ |
| 153 | WORD32 i4_change_in_inter_frm_int; |
| 154 | |
| 155 | /* |
| 156 | * When a change_in_inter_frm_int is called, this stores the new |
| 157 | * inter_frm_int |
| 158 | */ |
| 159 | WORD32 i4_new_inter_frm_int; |
| 160 | |
| 161 | /* |
| 162 | * When a change_in_inter_frm_int is called in the middle of a gop,this |
| 163 | * stores the B_PICs in the incomplete subgop of the mixed gop |
| 164 | */ |
| 165 | WORD32 i4_b_in_incomp_subgop_mix_gop; |
| 166 | |
| 167 | /* |
| 168 | * For a CLOSED GOP, when a change_in_inter_frm_int is called in the middle |
| 169 | * of a gop,this is a flag denoting if there is an extra P_PIC in the mixed |
| 170 | * gop |
| 171 | */ |
| 172 | WORD32 i4_extra_p_mix_gop; |
| 173 | |
| 174 | /* A flag that is set when the codec calls for a change in intra_frm_int */ |
| 175 | WORD32 i4_change_in_intra_frm_int; |
| 176 | |
| 177 | /* |
| 178 | * When a change_in_intra_frm_int is called, this stores the new |
| 179 | * intra_frm_int |
| 180 | */ |
| 181 | WORD32 i4_new_intra_frm_int; |
| 182 | |
| 183 | /*************************************************************************** |
| 184 | * Previous pic_stack_indices & details |
| 185 | **************************************************************************/ |
| 186 | pic_details_t s_prev_pic_details; |
| 187 | |
| 188 | WORD32 i4_prev_b_pic_idx; |
| 189 | |
| 190 | WORD32 i4_last_frm_in_gop; |
| 191 | |
| 192 | WORD32 i4_first_gop_encoded; |
| 193 | |
| 194 | /* NITT TBR */ |
| 195 | picture_type_e e_previous_pic_type; |
| 196 | |
| 197 | WORD32 i4_force_I_frame; |
| 198 | |
| 199 | WORD32 i4_forced_I_frame_cur_frame; |
| 200 | |
| 201 | WORD32 i4_sum_remaining_frm_in_gop; |
| 202 | |
| 203 | WORD32 i4_mod_temp_ref_cnt; |
| 204 | |
| 205 | WORD32 i4_frames_in_fif_gop; |
| 206 | |
| 207 | WORD32 i4_prev_intra_frame_interval; |
| 208 | |
| 209 | } pic_handling_t; |
| 210 | |
| 211 | static void irc_update_pic_distbn(pic_handling_t *ps_pic_handling, |
| 212 | WORD32 i4_intra_frm_int, |
| 213 | WORD32 i4_inter_frm_int, |
| 214 | WORD32 i4_gop_boundary); |
| 215 | |
| 216 | static void find_pic_distbn_in_gop(WORD32 i4_frms_in_gop[MAX_PIC_TYPE], |
| 217 | WORD32 i4_intra_frm_int, |
| 218 | WORD32 i4_inter_frm_int, |
| 219 | WORD32 i4_is_gop_closed, |
| 220 | WORD32 *pi4_b_in_incomp_subgop, |
| 221 | WORD32 *pi4_extra_p); |
| 222 | |
| 223 | WORD32 irc_pic_handling_num_fill_use_free_memtab(pic_handling_t **pps_pic_handling, |
| 224 | itt_memtab_t *ps_memtab, |
| 225 | ITT_FUNC_TYPE_E e_func_type) |
| 226 | { |
| 227 | WORD32 i4_mem_tab_idx = 0; |
Martin Storsjo | 7313602 | 2015-06-23 14:51:06 +0300 | [diff] [blame] | 228 | pic_handling_t s_pic_handling_temp; |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 229 | |
| 230 | /* |
| 231 | * Hack for al alloc, during which we dont have any state memory. |
| 232 | * Dereferencing can cause issues |
| 233 | */ |
| 234 | if(e_func_type == GET_NUM_MEMTAB || e_func_type == FILL_MEMTAB) |
| 235 | { |
| 236 | (*pps_pic_handling) = &s_pic_handling_temp; |
| 237 | } |
| 238 | |
| 239 | /*for src rate control state structure*/ |
| 240 | if(e_func_type != GET_NUM_MEMTAB) |
| 241 | { |
| 242 | fill_memtab(&ps_memtab[i4_mem_tab_idx], sizeof(pic_handling_t), |
| 243 | ALIGN_128_BYTE, PERSISTENT, DDR); |
| 244 | use_or_fill_base(&ps_memtab[0], (void**)pps_pic_handling, e_func_type); |
| 245 | } |
| 246 | i4_mem_tab_idx++; |
| 247 | |
| 248 | return (i4_mem_tab_idx); |
| 249 | } |
| 250 | |
| 251 | /****************************************************************************** |
| 252 | Description : initializes the pic handling state struct |
| 253 | *****************************************************************************/ |
| 254 | void irc_init_pic_handling(pic_handling_t *ps_pic_handling, |
| 255 | WORD32 i4_intra_frm_int, |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 256 | WORD32 i4_inter_frm_int, |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 257 | WORD32 i4_max_inter_frm_int, |
| 258 | WORD32 i4_is_gop_closed) |
| 259 | { |
| 260 | /* Declarations */ |
| 261 | WORD32 i; |
| 262 | |
| 263 | /* Checks */ |
| 264 | /* Codec Parameters */ |
| 265 | ps_pic_handling->i4_intra_frm_int = i4_intra_frm_int; |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 266 | ps_pic_handling->i4_inter_frm_int = i4_inter_frm_int; |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 267 | ps_pic_handling->i4_max_inter_frm_int = i4_max_inter_frm_int; |
| 268 | ps_pic_handling->i4_is_gop_closed = i4_is_gop_closed; |
| 269 | |
| 270 | /* Pic_stack */ |
| 271 | memset(ps_pic_handling->as_pic_stack, 0, |
| 272 | sizeof(ps_pic_handling->as_pic_stack)); |
| 273 | memset(&ps_pic_handling->s_prev_pic_details, 0, |
| 274 | sizeof(ps_pic_handling->s_prev_pic_details)); |
| 275 | |
| 276 | /* Counters */ |
| 277 | ps_pic_handling->i4_buf_pic_no = 0; |
| 278 | ps_pic_handling->i4_pic_disp_order_no = 0; |
| 279 | |
| 280 | /* Indices to the pic_stack */ |
| 281 | ps_pic_handling->i4_ref_pic_idx = 0; |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 282 | /* |
| 283 | * B frame index should be ref_frame_num, |
| 284 | * which is 2 in out case |
| 285 | */ |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 286 | ps_pic_handling->i4_b_pic_idx = 2; |
| 287 | ps_pic_handling->i4_prev_b_pic_idx = 2; |
| 288 | |
| 289 | /* Variables working on the input frames */ |
| 290 | ps_pic_handling->i4_is_first_gop = 1; |
| 291 | ps_pic_handling->i4_p_count_in_gop = 0; |
| 292 | ps_pic_handling->i4_b_count_in_gop = 0; |
| 293 | ps_pic_handling->i4_b_count_in_subgop = 0; |
| 294 | |
| 295 | /* Variables working on the output frames */ |
| 296 | ps_pic_handling->i4_coded_pic_no = -1; |
| 297 | ps_pic_handling->i4_stack_count = -1; |
| 298 | |
| 299 | /* Tracks the changes in the Codec Parameters */ |
| 300 | ps_pic_handling->i4_change_in_inter_frm_int = 0; |
| 301 | ps_pic_handling->i4_new_inter_frm_int = i4_max_inter_frm_int; |
| 302 | |
| 303 | /* Tracks the changes in the Codec Parameters */ |
| 304 | ps_pic_handling->i4_change_in_intra_frm_int = 0; |
| 305 | ps_pic_handling->i4_new_intra_frm_int = i4_intra_frm_int; |
| 306 | |
| 307 | /* Variables on which the bit allocation is dependent */ |
| 308 | /* Get the pic distribution in the gop */ |
| 309 | find_pic_distbn_in_gop(ps_pic_handling->i4_frms_in_gop, i4_intra_frm_int, |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 310 | i4_inter_frm_int, i4_is_gop_closed, |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 311 | &ps_pic_handling->i4_b_in_incomp_subgop, |
| 312 | &ps_pic_handling->i4_extra_p); |
| 313 | |
| 314 | for(i = 0; i < MAX_PIC_TYPE; i++) |
| 315 | { |
| 316 | ps_pic_handling->i4_frms_in_cur_gop[i] = |
| 317 | ps_pic_handling->i4_frms_in_gop[i]; |
| 318 | ps_pic_handling->i4_rem_frms_in_gop[i] = |
| 319 | ps_pic_handling->i4_frms_in_gop[i]; |
| 320 | } |
| 321 | |
| 322 | ps_pic_handling->e_previous_pic_type = I_PIC; |
| 323 | ps_pic_handling->i4_prev_intra_frame_interval = i4_intra_frm_int; |
| 324 | ps_pic_handling->i4_force_I_frame = 0; |
| 325 | ps_pic_handling->i4_forced_I_frame_cur_frame = 0; |
| 326 | ps_pic_handling->i4_sum_remaining_frm_in_gop = 0; |
| 327 | ps_pic_handling->i4_mod_temp_ref_cnt = 0; |
| 328 | |
| 329 | ps_pic_handling->i4_b_in_incomp_subgop_mix_gop = |
| 330 | ps_pic_handling->i4_b_in_incomp_subgop; |
| 331 | ps_pic_handling->i4_extra_p_mix_gop = ps_pic_handling->i4_extra_p; |
| 332 | |
| 333 | ps_pic_handling->i4_last_frm_in_gop = 0; |
| 334 | ps_pic_handling->i4_first_gop_encoded = 0; |
| 335 | ps_pic_handling->i4_frames_in_fif_gop = 0; |
| 336 | |
| 337 | } |
| 338 | |
| 339 | /******************************************************************************* |
| 340 | * @brief registers the new intra frame interval value |
| 341 | ******************************************************************************/ |
| 342 | void irc_pic_handling_register_new_int_frm_interval(pic_handling_t *ps_pic_handling, |
| 343 | WORD32 i4_intra_frm_int) |
| 344 | { |
| 345 | ps_pic_handling->i4_change_in_intra_frm_int = 1; |
| 346 | ps_pic_handling->i4_new_intra_frm_int = i4_intra_frm_int; |
| 347 | } |
| 348 | |
| 349 | void irc_pic_handling_register_new_inter_frm_interval(pic_handling_t *ps_pic_handling, |
| 350 | WORD32 i4_inter_frm_int) |
| 351 | { |
| 352 | /* Update the state structure with the latest values */ |
| 353 | ps_pic_handling->i4_change_in_inter_frm_int = 1; |
| 354 | ps_pic_handling->i4_new_inter_frm_int = i4_inter_frm_int; |
| 355 | } |
| 356 | |
| 357 | static void start_new_gop(pic_handling_t *ps_pic_handling) |
| 358 | { |
| 359 | WORD32 i; |
| 360 | WORD32 i4_sum_remaining_frm_in_gop = 0; |
| 361 | |
| 362 | /* Now, the end of gop updates */ |
| 363 | ps_pic_handling->i4_pic_disp_order_no = 0; |
| 364 | ps_pic_handling->i4_buf_pic_no = 0; |
| 365 | ps_pic_handling->i4_is_first_gop = 0; |
| 366 | ps_pic_handling->i4_extra_p_mix_gop = ps_pic_handling->i4_extra_p; |
| 367 | |
| 368 | if(ps_pic_handling->i4_is_gop_closed) |
| 369 | { |
| 370 | ps_pic_handling->i4_b_in_incomp_subgop_mix_gop = |
| 371 | ps_pic_handling->i4_b_in_incomp_subgop; |
| 372 | } |
| 373 | /* |
| 374 | * Store the number of frames in the gop that is encoded till now |
| 375 | * just before Force I frame call is made |
| 376 | */ |
| 377 | ps_pic_handling->i4_frames_in_fif_gop = ps_pic_handling->i4_b_count_in_gop |
| 378 | + ps_pic_handling->i4_p_count_in_gop + 1; |
| 379 | for(i = 0; i < MAX_PIC_TYPE; i++) |
| 380 | { |
| 381 | i4_sum_remaining_frm_in_gop += ps_pic_handling->i4_rem_frms_in_gop[i]; |
| 382 | } |
| 383 | ps_pic_handling->i4_sum_remaining_frm_in_gop = i4_sum_remaining_frm_in_gop; |
| 384 | for(i = 0; i < MAX_PIC_TYPE; i++) |
| 385 | { |
| 386 | ps_pic_handling->i4_frms_in_cur_gop[i] = |
| 387 | ps_pic_handling->i4_frms_in_gop[i]; |
| 388 | ps_pic_handling->i4_rem_frms_in_gop[i] = |
| 389 | ps_pic_handling->i4_frms_in_cur_gop[i]; |
| 390 | } |
| 391 | } |
| 392 | |
| 393 | /******************************************************************************* |
| 394 | * @brief Fills the pic_stack with the incoming pics in encode order |
| 395 | ******************************************************************************/ |
| 396 | void irc_add_pic_to_stack(pic_handling_t *ps_pic_handling, WORD32 i4_enc_pic_id) |
| 397 | { |
| 398 | /* Declarations */ |
| 399 | WORD32 i4_inter_frm_int, i4_max_inter_frm_int, |
| 400 | i4_intra_frm_int, i4_new_inter_frm_int; |
| 401 | WORD32 i4_is_gop_closed; |
| 402 | WORD32 i4_buf_pic_no, i4_pic_disp_order_no; |
| 403 | WORD32 i4_b_pic_idx, i4_ref_pic_idx; |
| 404 | WORD32 i4_is_first_gop, i4_b_in_incomp_subgop, i4_p_count_in_gop, |
| 405 | i4_b_count_in_gop, i4_b_count_in_subgop; |
| 406 | WORD32 i, i4_p_frms_in_prd, i4_b_frms_in_prd, |
| 407 | i4_num_b_in_subgop, i4_extra_p; |
| 408 | WORD32 i4_condn_for_change_in_inter_frm_int; |
| 409 | picture_type_e e_previous_pic_type, e_cur_pic_type; |
| 410 | WORD32 i4_force_I_frame; |
| 411 | |
| 412 | /* |
| 413 | * Initialize the local vars with the state struct values needed by the |
| 414 | * change calls |
| 415 | */ |
| 416 | i4_intra_frm_int = ps_pic_handling->i4_intra_frm_int; |
| 417 | i4_inter_frm_int = ps_pic_handling->i4_inter_frm_int; |
| 418 | i4_max_inter_frm_int = ps_pic_handling->i4_max_inter_frm_int; |
| 419 | i4_is_gop_closed = ps_pic_handling->i4_is_gop_closed; |
| 420 | |
| 421 | i4_buf_pic_no = ps_pic_handling->i4_buf_pic_no; |
| 422 | i4_pic_disp_order_no = ps_pic_handling->i4_pic_disp_order_no; |
| 423 | i4_b_count_in_gop = ps_pic_handling->i4_b_count_in_gop; |
| 424 | i4_b_frms_in_prd = ps_pic_handling->i4_frms_in_cur_gop[B_PIC]; |
| 425 | i4_is_first_gop = ps_pic_handling->i4_is_first_gop; |
| 426 | i4_new_inter_frm_int = ps_pic_handling->i4_new_inter_frm_int; |
| 427 | e_previous_pic_type = ps_pic_handling->e_previous_pic_type; |
| 428 | i4_force_I_frame = ps_pic_handling->i4_force_I_frame; |
| 429 | |
| 430 | /* Force I frame : |
| 431 | * Two different cases |
| 432 | * 1)OPEN_GOP: New GOP is started after number of B pictures in the last |
| 433 | * sub gop of a gop to mimic the GOP structure. |
| 434 | * 2)Closed GOP:Wait till P frame at input and The frame after a P frame |
| 435 | * a new GOP is started to mimic the GOP structure. |
| 436 | */ |
| 437 | if(i4_force_I_frame) |
| 438 | { |
| 439 | WORD32 i4_temp_is_gop_closed; |
| 440 | WORD32 i4_codn = 0; |
| 441 | /* A special case of Open GOP where the it behaves like Closed GOP*/ |
| 442 | if((i4_intra_frm_int % i4_inter_frm_int) == 1) |
| 443 | { |
| 444 | i4_temp_is_gop_closed = 1; |
| 445 | } |
| 446 | else |
| 447 | { |
| 448 | i4_temp_is_gop_closed = i4_is_gop_closed; |
| 449 | } |
| 450 | /* Get the current picture type to aid decision to force an I frame*/ |
| 451 | if((i4_buf_pic_no % i4_inter_frm_int) |
| 452 | && !(i4_is_gop_closed&& (i4_b_count_in_gop == i4_b_frms_in_prd))) |
| 453 | { |
| 454 | e_cur_pic_type = B_PIC; |
| 455 | } |
| 456 | else |
| 457 | { |
| 458 | if(i4_pic_disp_order_no == 0) |
| 459 | { |
| 460 | e_cur_pic_type = I_PIC; |
| 461 | } |
| 462 | else |
| 463 | { |
| 464 | e_cur_pic_type = P_PIC; |
| 465 | } |
| 466 | } |
| 467 | if((i4_intra_frm_int % i4_inter_frm_int) == 0) |
| 468 | { |
| 469 | i4_codn = (e_cur_pic_type == P_PIC); |
| 470 | } |
| 471 | else |
| 472 | { |
| 473 | i4_codn = (ps_pic_handling->i4_b_count_in_subgop |
| 474 | == ps_pic_handling->i4_b_in_incomp_subgop); |
| 475 | } |
| 476 | if(e_cur_pic_type == I_PIC) |
| 477 | { |
| 478 | /* |
| 479 | * Don't do anything. Resetting the force I frame flag |
| 480 | * since the current picture type is already a I frame |
| 481 | */ |
| 482 | i4_force_I_frame = 0; |
| 483 | } |
| 484 | else if(i4_inter_frm_int == 1) |
| 485 | { |
| 486 | /*IPP case , Force I frame immediately*/ |
| 487 | start_new_gop(ps_pic_handling); |
| 488 | } |
| 489 | else if((!i4_temp_is_gop_closed) && i4_codn) |
| 490 | { |
| 491 | start_new_gop(ps_pic_handling); |
| 492 | if(ps_pic_handling->i4_b_count_in_subgop) |
| 493 | { |
| 494 | ps_pic_handling->i4_b_pic_idx += 1; |
| 495 | ps_pic_handling->i4_b_pic_idx %= (i4_max_inter_frm_int + 1); |
| 496 | } |
| 497 | } |
| 498 | else if(i4_temp_is_gop_closed && (e_previous_pic_type == P_PIC) |
| 499 | && (e_cur_pic_type != P_PIC)) |
| 500 | { |
| 501 | start_new_gop(ps_pic_handling); |
| 502 | ps_pic_handling->i4_b_pic_idx++; |
| 503 | ps_pic_handling->i4_b_pic_idx %= (i4_max_inter_frm_int + 1); |
| 504 | } |
| 505 | i4_is_first_gop = ps_pic_handling->i4_is_first_gop; |
| 506 | } |
| 507 | |
| 508 | |
| 509 | /***********************CHANGE_INTRA_FRM_INTERVAL************************** |
| 510 | * |
| 511 | * Call the irc_update_pic_distbn if |
| 512 | * 1)Change in intra frm interval flag is set |
| 513 | * 2)It's the first B_PIC of a gop |
| 514 | */ |
| 515 | if((ps_pic_handling->i4_change_in_intra_frm_int == 1) |
| 516 | && ((i4_pic_disp_order_no == 1))) |
| 517 | { |
| 518 | irc_update_pic_distbn(ps_pic_handling, |
| 519 | ps_pic_handling->i4_new_intra_frm_int, |
| 520 | ps_pic_handling->i4_inter_frm_int, 1); |
| 521 | |
| 522 | ps_pic_handling->i4_change_in_intra_frm_int = 0; |
| 523 | |
| 524 | if(ps_pic_handling->i4_new_intra_frm_int == 1) |
| 525 | { |
| 526 | ps_pic_handling->i4_pic_disp_order_no = 0; |
| 527 | } |
| 528 | } |
| 529 | /*********************CHANGE_INTER_FRM_INTERVAL****************************/ |
| 530 | /* Call irc_update_pic_distbn if |
| 531 | * 1)Change in inter frm interval flag is set |
| 532 | * 2)It's the first B_PIC after gop/subgop start, and |
| 533 | * 3)The new inter-frm-interval won't cross the intra_frm_interval |
| 534 | */ |
| 535 | if((ps_pic_handling->i4_change_in_inter_frm_int == 1) |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 536 | && ((i4_buf_pic_no % i4_inter_frm_int == 1)|| (i4_pic_disp_order_no == 1) || (i4_inter_frm_int == 1))) |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 537 | { |
| 538 | /* |
| 539 | * Condition which checks if the new inter_frm_int will cross the |
| 540 | * intra_frm_int |
| 541 | */ |
| 542 | i4_condn_for_change_in_inter_frm_int = ((i4_pic_disp_order_no |
| 543 | + i4_new_inter_frm_int - 1) < i4_intra_frm_int); |
| 544 | |
| 545 | if(i4_condn_for_change_in_inter_frm_int) |
| 546 | { |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 547 | /* |
| 548 | * If there is a change in inter frame interval. We should set the b |
| 549 | * frame IDX to the (num ref frame - num ref frame in buf)+ i4_ref_pic_idx |
| 550 | * Since our case we have a structure of I B P or I B...B P only |
| 551 | * we have three cases |
| 552 | * 1) current incoming frame is I. Then we have to leave space for |
| 553 | * current I and next P hence write b idx as to ref idx + 2 |
| 554 | * 2) Current incoming frame is B. In that case, we have I in buffer. |
| 555 | * Only one P needs space hence write b idx as ref idx +1 |
| 556 | * 3) Current incoming frame is P. In that case we are at the end of |
| 557 | * gop [sub gop?] and we have to leave space for next gops I and P. |
| 558 | * Thus b idx = ref idx + 2 |
| 559 | * |
| 560 | * In case of an closed Gop. The last frame has to be forced to be a P. |
| 561 | * Hence we may have problems in that case. |
| 562 | * |
| 563 | * Also this has the implicit assumption of only 2 ref frames |
| 564 | */ |
| 565 | WORD32 i4_is_curr_frm_b = (i4_buf_pic_no % i4_new_inter_frm_int)&& |
| 566 | !(i4_is_gop_closed && (i4_b_count_in_gop == i4_b_frms_in_prd)); |
| 567 | |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 568 | /*If the inter_frm_int = 1, then the b_pic_idx needs to be modified */ |
| 569 | if(i4_inter_frm_int == 1) |
| 570 | { |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 571 | ps_pic_handling->i4_b_pic_idx = ((i4_is_curr_frm_b ? 1 : 2) |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 572 | + ps_pic_handling->i4_ref_pic_idx) |
| 573 | % (i4_max_inter_frm_int + 1); |
| 574 | } |
| 575 | |
| 576 | /* |
| 577 | * Depending on the gop/subgop boundary, call the change_inter_frm_int |
| 578 | * |
| 579 | * TO DO: make a single call, change the name of the fxn to |
| 580 | * update_state, |
| 581 | * where state = frms_in_gop + b_incomp_subgop + extra_p |
| 582 | */ |
| 583 | |
| 584 | /* GOP boundary */ |
| 585 | if(i4_pic_disp_order_no == 1) |
| 586 | { |
| 587 | irc_update_pic_distbn(ps_pic_handling, |
| 588 | ps_pic_handling->i4_intra_frm_int, |
| 589 | ps_pic_handling->i4_new_inter_frm_int, 1); |
| 590 | } |
| 591 | /* Subgop boundary */ |
| 592 | else |
| 593 | { |
| 594 | irc_update_pic_distbn(ps_pic_handling, |
| 595 | ps_pic_handling->i4_intra_frm_int, |
| 596 | ps_pic_handling->i4_new_inter_frm_int, 0); |
| 597 | } |
| 598 | |
| 599 | ps_pic_handling->i4_change_in_inter_frm_int = 0; |
| 600 | ps_pic_handling->i4_new_inter_frm_int = |
| 601 | ps_pic_handling->i4_inter_frm_int; |
| 602 | } |
| 603 | |
| 604 | } |
| 605 | |
| 606 | /* Initialize the local vars with the state struct values */ |
| 607 | i4_buf_pic_no = ps_pic_handling->i4_buf_pic_no; |
| 608 | i4_pic_disp_order_no = ps_pic_handling->i4_pic_disp_order_no; |
| 609 | i4_b_pic_idx = ps_pic_handling->i4_b_pic_idx; |
| 610 | i4_ref_pic_idx = ps_pic_handling->i4_ref_pic_idx; |
| 611 | i4_b_in_incomp_subgop = ps_pic_handling->i4_b_in_incomp_subgop_mix_gop; |
| 612 | i4_p_count_in_gop = ps_pic_handling->i4_p_count_in_gop; |
| 613 | i4_b_count_in_gop = ps_pic_handling->i4_b_count_in_gop; |
| 614 | i4_b_count_in_subgop = ps_pic_handling->i4_b_count_in_subgop; |
| 615 | i4_p_frms_in_prd = ps_pic_handling->i4_frms_in_cur_gop[P_PIC]; |
| 616 | i4_b_frms_in_prd = ps_pic_handling->i4_frms_in_cur_gop[B_PIC]; |
| 617 | i4_extra_p = ps_pic_handling->i4_extra_p_mix_gop; |
| 618 | i4_inter_frm_int = ps_pic_handling->i4_inter_frm_int; |
| 619 | i4_intra_frm_int = ps_pic_handling->i4_intra_frm_int; |
| 620 | |
| 621 | /* Initializing the prev_state vars */ |
| 622 | ps_pic_handling->i4_prev_b_pic_idx = ps_pic_handling->i4_b_pic_idx; |
| 623 | |
| 624 | i4_num_b_in_subgop = (i4_inter_frm_int - 1); |
| 625 | |
| 626 | /*********************** Fill the stack ***********************************/ |
| 627 | /* The next part of the code is organized as |
| 628 | * |
| 629 | * if(B_PIC conditions satisfied) |
| 630 | * { |
| 631 | * Fill the pic_stack using the b_pic_index |
| 632 | * Update the b_pic_index and the other b_pic related vars for the |
| 633 | * next B_PIC |
| 634 | * } |
| 635 | * else |
| 636 | * { |
| 637 | * if(I_PIC conditions are satisfied) |
| 638 | * { |
| 639 | * Fill the pic_stack using the ref_pic_index |
| 640 | * Update the ref_pic_index and the other ref_pic related vars for the next |
| 641 | * I_PIC/P_PIC |
| 642 | * } |
| 643 | * else |
| 644 | * { |
| 645 | * Fill the pic_stack using the ref_pic_index |
| 646 | * Update the ref_pic_index and the other ref_pic related vars for the next |
| 647 | * I_PIC/P_PIC |
| 648 | * } |
| 649 | * } |
| 650 | */ |
| 651 | /* |
| 652 | * Condition for a B_PIC - |
| 653 | * 1) Other than the first I_PIC and the periodically appearing P_PICs, after |
| 654 | * every inter_frm_int, rest all pics are B_PICs |
| 655 | * 2) In case of CLOSED_GOP, the last frame of the gop has to be a P_PIC |
| 656 | */ |
| 657 | |
| 658 | if((i4_buf_pic_no % i4_inter_frm_int)&& !(i4_is_gop_closed |
| 659 | && (i4_b_count_in_gop == i4_b_frms_in_prd))) /**** B_PIC ****/ |
| 660 | { |
| 661 | /* Fill the pic_stack */ |
| 662 | ps_pic_handling->as_pic_stack[i4_b_pic_idx].i4_pic_id = i4_enc_pic_id; |
| 663 | ps_pic_handling->as_pic_stack[i4_b_pic_idx].e_pic_type = B_PIC; |
| 664 | ps_pic_handling->as_pic_stack[i4_b_pic_idx].i4_pic_disp_order_no = |
| 665 | i4_pic_disp_order_no; |
| 666 | |
| 667 | /* Store Pic type*/ |
| 668 | e_previous_pic_type = B_PIC; |
| 669 | |
| 670 | /* Update the prev_pic_details */ |
| 671 | memcpy(&ps_pic_handling->s_prev_pic_details, |
| 672 | &ps_pic_handling->as_pic_stack[i4_b_pic_idx], |
| 673 | sizeof(pic_details_t)); |
| 674 | |
| 675 | i4_b_count_in_gop++; |
| 676 | i4_b_count_in_subgop++; |
| 677 | |
| 678 | /* Update the i4_b_pic_idx */ |
| 679 | if(!i4_is_gop_closed) |
| 680 | { |
| 681 | /* If this B_PIC features in one of the complete subgops */ |
| 682 | if((i4_b_count_in_subgop < i4_num_b_in_subgop) |
| 683 | && !(i4_b_count_in_gop == i4_b_frms_in_prd)) |
| 684 | { |
| 685 | i4_b_pic_idx++; |
| 686 | } |
| 687 | else /* Else if this B_PIC is the last one in a subgop or gop */ |
| 688 | { |
| 689 | /* |
| 690 | * If this is the last B_PIC of a GOP, depending on the number |
| 691 | * of incomp B_pics in the subgop, there can be either only I |
| 692 | * or I,P pics between this and the next B_PIC |
| 693 | */ |
| 694 | if(i4_b_count_in_gop == i4_b_frms_in_prd) |
| 695 | { |
| 696 | i4_b_pic_idx += (2 + (!i4_b_in_incomp_subgop)); /*Prev*/ |
| 697 | i4_b_count_in_gop = 0; |
| 698 | } |
| 699 | /* |
| 700 | * For the last B_PIC of a subgop, there's always a P b/w |
| 701 | * this & the next B_PIC |
| 702 | */ |
| 703 | else |
| 704 | { |
| 705 | i4_b_pic_idx += 2; |
| 706 | } |
| 707 | i4_b_count_in_subgop = 0; |
| 708 | } |
| 709 | } |
| 710 | else |
| 711 | { |
| 712 | /* For the last B_PIC of a gop |
| 713 | * Normally,there will be 3 pics (P,I,P) between this and the next |
| 714 | * B_PIC for a CLOSED gop, except when |
| 715 | * 1)Number of P_pics in the gop = 1 |
| 716 | * 2)There is an extra P at the end of the gop |
| 717 | */ |
| 718 | if(i4_b_count_in_gop == i4_b_frms_in_prd) |
| 719 | { |
| 720 | i4_b_pic_idx += (3 + ((i4_b_in_incomp_subgop == 0) |
| 721 | && (i4_p_frms_in_prd> 1) |
| 722 | && (i4_pic_disp_order_no |
| 723 | != (i4_p_frms_in_prd+ i4_b_frms_in_prd- 1)))); |
| 724 | |
| 725 | i4_b_count_in_subgop = 0; |
| 726 | } |
| 727 | /* For a B_PIC which is not the last one in a subgop */ |
| 728 | else if(i4_b_count_in_subgop < i4_num_b_in_subgop) |
| 729 | { |
| 730 | i4_b_pic_idx++; |
| 731 | } |
| 732 | else /* For the last B_PIC of a subgop */ |
| 733 | { |
| 734 | i4_b_pic_idx += 2; |
| 735 | i4_b_count_in_subgop = 0; |
| 736 | } |
| 737 | } |
| 738 | i4_b_pic_idx %= (i4_max_inter_frm_int + 1); |
| 739 | } |
| 740 | /*********** I or P pic *********/ |
| 741 | else |
| 742 | { |
| 743 | ps_pic_handling->as_pic_stack[i4_ref_pic_idx].i4_pic_id = i4_enc_pic_id; |
| 744 | ps_pic_handling->as_pic_stack[i4_ref_pic_idx].i4_pic_disp_order_no = |
| 745 | i4_pic_disp_order_no; |
| 746 | /* Store Pic type*/ |
| 747 | e_previous_pic_type = I_PIC; |
| 748 | |
| 749 | /**** I_PIC ****/ |
| 750 | if(i4_pic_disp_order_no == 0) |
| 751 | { |
| 752 | ps_pic_handling->as_pic_stack[i4_ref_pic_idx].e_pic_type = I_PIC; |
| 753 | |
| 754 | /* Update the prev_pic_details */ |
| 755 | memcpy(&ps_pic_handling->s_prev_pic_details, |
| 756 | &ps_pic_handling->as_pic_stack[i4_ref_pic_idx], |
| 757 | sizeof(pic_details_t)); |
| 758 | /* |
| 759 | * In case of an I-frame depending on OPEN or CLOSED gop, |
| 760 | * the ref_pic_idx changes |
| 761 | */ |
| 762 | if((!i4_is_gop_closed) && (i4_is_first_gop == 0)) |
| 763 | { |
| 764 | if((i4_p_frms_in_prd <= 1) && (i4_b_in_incomp_subgop == 0)) |
| 765 | { |
| 766 | i4_ref_pic_idx++; |
| 767 | } |
| 768 | /* |
| 769 | * From the 2nd gop onwards, the I and first P frame are |
| 770 | * separated by the num_b_in_incomp_subgop |
| 771 | */ |
| 772 | else |
| 773 | { |
| 774 | i4_ref_pic_idx += (i4_b_in_incomp_subgop + 1); |
| 775 | } |
| 776 | |
| 777 | ps_pic_handling->i4_b_in_incomp_subgop_mix_gop = |
| 778 | ps_pic_handling->i4_b_in_incomp_subgop; |
| 779 | } |
| 780 | else |
| 781 | { |
| 782 | i4_ref_pic_idx++; |
| 783 | } |
| 784 | |
| 785 | i4_b_count_in_gop = 0; |
| 786 | i4_p_count_in_gop = 0; |
| 787 | i4_b_count_in_subgop = 0; |
| 788 | |
| 789 | } |
| 790 | /**** P_PIC ****/ |
| 791 | else |
| 792 | { |
| 793 | ps_pic_handling->as_pic_stack[i4_ref_pic_idx].e_pic_type = P_PIC; |
| 794 | /* Store Pic type*/ |
| 795 | e_previous_pic_type = P_PIC; |
| 796 | |
| 797 | /* Update the prev_pic_details */ |
| 798 | memcpy(&ps_pic_handling->s_prev_pic_details, |
| 799 | &ps_pic_handling->as_pic_stack[i4_ref_pic_idx], |
| 800 | sizeof(pic_details_t)); |
| 801 | |
| 802 | i4_p_count_in_gop++; |
| 803 | ps_pic_handling->i4_prev_intra_frame_interval = i4_intra_frm_int; |
| 804 | |
| 805 | /* |
| 806 | * In case of an P-frame depending on OPEN or CLOSED gop, the |
| 807 | * ref_pic_idx changes |
| 808 | */ |
| 809 | if(i4_is_gop_closed && (i4_p_count_in_gop == i4_p_frms_in_prd)) |
| 810 | { |
| 811 | /* |
| 812 | * For the last P_PIC in a gop, if extra_p or incomp_b are |
| 813 | * present, the number of such pics between this and the next |
| 814 | * ref_pic is (i4_b_in_incomp_subgop + 1) |
| 815 | */ |
| 816 | if((i4_p_count_in_gop > 1) |
| 817 | && (i4_b_in_incomp_subgop || i4_extra_p)) |
| 818 | { |
| 819 | i4_ref_pic_idx += (i4_b_in_incomp_subgop + 1); |
| 820 | } |
| 821 | else |
| 822 | { |
| 823 | i4_ref_pic_idx += i4_inter_frm_int; |
| 824 | } |
| 825 | } |
| 826 | else |
| 827 | { |
| 828 | i4_ref_pic_idx += i4_inter_frm_int; |
| 829 | } |
| 830 | } |
| 831 | |
| 832 | i4_ref_pic_idx %= (i4_max_inter_frm_int + 1); |
| 833 | } |
| 834 | |
| 835 | /* Update those variables working on the input frames */ |
| 836 | i4_pic_disp_order_no++; |
| 837 | i4_buf_pic_no++; |
| 838 | |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 839 | #if 0 |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 840 | /* For any gop */ |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 841 | /* BUG FIX |
| 842 | * This piece of code resets the gop upon I frame(?) |
| 843 | * This introduces a problem of GOP getting reset not at I frames as it should be |
| 844 | * The reason AFAIK is that |
| 845 | * 1) This code uses i4_pic_disp_order_no to reset GOP. I assume it computes |
| 846 | * if are at GOP boundary and does it, but not sure |
| 847 | * 2) The frames rmainign in GOP is done in post enc as it should be. |
| 848 | * |
| 849 | * Also ps_pic_handling->i4_pic_disp_order_no is incremented when a pic is added |
| 850 | * to stack becuase the additon is in disp order while poping is in encode order |
| 851 | * |
| 852 | * SUppose there is a deay od 1 frame between queue and encode. |
| 853 | * then he timing will be. Assume a GOP of IPPIPP |
| 854 | * |
| 855 | * Input buff Input to qu Output buf/encode buff remaining pic in gop |
| 856 | * 1 I I NA rest to 1 2 |
| 857 | * 2 P P I 0 2 |
| 858 | * 3 P P P 0 1 |
| 859 | * 4 I I P reset to 1 2 |
| 860 | * 5 P P I 1 1 |
| 861 | * 6 P P P 1 0 |
| 862 | * 7 NA NA P |
| 863 | * |
| 864 | * Hence our gop gets reset at I(1) and I(4) in the RC.thus the reaming pic in gop |
| 865 | * count will be as shown. We can clearly see that the GOP gets reset at I(4) .Hence |
| 866 | * for the correpondinng QP for output buf p(4) will be that of an I frame. |
| 867 | * |
| 868 | * By hiding this I hope to fix this problem. But Iam not sure exaclty. |
| 869 | * This needs to be investigated further |
| 870 | * |
| 871 | * By hiding this most likely we are in effect disabling the dynanic |
| 872 | * update of gop params. |
| 873 | */ |
| 874 | |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 875 | if(ps_pic_handling->i4_pic_disp_order_no |
| 876 | == (i4_max_inter_frm_int - 1- ((!i4_is_gop_closed) |
| 877 | * ps_pic_handling->i4_b_in_incomp_subgop_mix_gop))) |
| 878 | { |
| 879 | for(i = 0; i < MAX_PIC_TYPE; i++) |
| 880 | { |
| 881 | ps_pic_handling->i4_rem_frms_in_gop[i] = |
| 882 | ps_pic_handling->i4_frms_in_cur_gop[i]; |
| 883 | } |
| 884 | |
| 885 | if((!i4_is_gop_closed) && (i4_is_first_gop) |
| 886 | && (ps_pic_handling->i4_rem_frms_in_gop[B_PIC] |
| 887 | > ps_pic_handling->i4_b_in_incomp_subgop_mix_gop)) |
| 888 | { |
| 889 | ps_pic_handling->i4_rem_frms_in_gop[B_PIC] = |
| 890 | ps_pic_handling->i4_frms_in_cur_gop[B_PIC] |
| 891 | - ps_pic_handling->i4_b_in_incomp_subgop_mix_gop; |
| 892 | } |
| 893 | } |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 894 | #endif |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 895 | |
| 896 | /* End of GOP updates */ |
| 897 | if(i4_pic_disp_order_no == (i4_p_frms_in_prd + i4_b_frms_in_prd + 1)) |
| 898 | { |
| 899 | /* Now, the end of gop updates */ |
| 900 | i4_pic_disp_order_no = 0; |
| 901 | i4_buf_pic_no = 0; |
| 902 | i4_is_first_gop = 0; |
| 903 | ps_pic_handling->i4_extra_p_mix_gop = ps_pic_handling->i4_extra_p; |
| 904 | |
| 905 | if(i4_is_gop_closed) |
| 906 | { |
| 907 | ps_pic_handling->i4_b_in_incomp_subgop_mix_gop = |
| 908 | ps_pic_handling->i4_b_in_incomp_subgop; |
| 909 | } |
| 910 | |
| 911 | for(i = 0; i < MAX_PIC_TYPE; i++) |
| 912 | { |
| 913 | ps_pic_handling->i4_frms_in_cur_gop[i] = |
| 914 | ps_pic_handling->i4_frms_in_gop[i]; |
| 915 | } |
| 916 | } |
| 917 | |
| 918 | /* Updating the vars which work on the encoded pics */ |
Harinarayanan K K | 63f40a8 | 2015-06-19 11:35:16 +0530 | [diff] [blame] | 919 | /* For the first gop */ |
| 920 | if ((ps_pic_handling->i4_is_first_gop) |
| 921 | && (ps_pic_handling->i4_pic_disp_order_no == 0)) |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 922 | { |
| 923 | ps_pic_handling->i4_coded_pic_no = 0; |
| 924 | ps_pic_handling->i4_stack_count = 0; |
| 925 | } |
| 926 | |
| 927 | /* Update the state struct with the modifiable local vars */ |
| 928 | ps_pic_handling->i4_buf_pic_no = i4_buf_pic_no; |
| 929 | ps_pic_handling->i4_pic_disp_order_no = i4_pic_disp_order_no; |
| 930 | ps_pic_handling->i4_b_pic_idx = i4_b_pic_idx; |
| 931 | ps_pic_handling->i4_ref_pic_idx = i4_ref_pic_idx; |
| 932 | ps_pic_handling->i4_is_first_gop = i4_is_first_gop; |
| 933 | ps_pic_handling->i4_p_count_in_gop = i4_p_count_in_gop; |
| 934 | ps_pic_handling->i4_b_count_in_gop = i4_b_count_in_gop; |
| 935 | ps_pic_handling->i4_b_count_in_subgop = i4_b_count_in_subgop; |
| 936 | ps_pic_handling->e_previous_pic_type = e_previous_pic_type; |
| 937 | ps_pic_handling->i4_force_I_frame = i4_force_I_frame; |
| 938 | } |
| 939 | |
| 940 | /******************************************************************************* |
| 941 | * @brief Returns the picture type, ip and display order number for the frame to |
| 942 | * be encoded |
| 943 | ******************************************************************************/ |
| 944 | void irc_get_pic_from_stack(pic_handling_t *ps_pic_handling, |
| 945 | WORD32 *pi4_pic_id, |
| 946 | WORD32 *pi4_pic_disp_order_no, |
| 947 | picture_type_e *pe_pic_type) |
| 948 | { |
| 949 | pic_details_t s_pic_details; |
| 950 | pic_details_t *ps_pic_details = &s_pic_details; |
| 951 | |
| 952 | if(ps_pic_handling->i4_stack_count < 0) |
| 953 | { |
| 954 | ps_pic_details->e_pic_type = BUF_PIC; |
| 955 | ps_pic_details->i4_pic_disp_order_no = -1; |
| 956 | ps_pic_details->i4_pic_id = -1; |
| 957 | } |
| 958 | else |
| 959 | { |
| 960 | memcpy(ps_pic_details, |
| 961 | &ps_pic_handling->as_pic_stack[ps_pic_handling->i4_stack_count], |
| 962 | sizeof(pic_details_t)); |
| 963 | |
| 964 | /* Force I frame updations */ |
| 965 | if((ps_pic_handling->i4_force_I_frame == 1) |
| 966 | && (ps_pic_details->e_pic_type == I_PIC)) |
| 967 | { |
| 968 | /* Flag to signal change in remaining bits*/ |
| 969 | ps_pic_handling->i4_forced_I_frame_cur_frame = 1; |
| 970 | ps_pic_handling->i4_force_I_frame = 0; |
| 971 | /* |
| 972 | * Indicates count for no. of Pictures whose temporal reference |
| 973 | * has to be modified |
| 974 | * in the new GOP |
| 975 | */ |
| 976 | ps_pic_handling->i4_mod_temp_ref_cnt = |
| 977 | ps_pic_handling->i4_b_in_incomp_subgop + 1; |
| 978 | ps_pic_handling->i4_first_gop_encoded = 1; |
| 979 | } |
| 980 | |
| 981 | /* |
| 982 | * In MPEG2, the temporal reference of the first displayed frame in a |
| 983 | * gop is 0.In case of an OPEN_GOP, the B_PICs of the last subgop in a |
| 984 | * gop, maybe coded as a part of the next gop. Hence, in such conditions |
| 985 | * the pic_disp_order needs to be modified so that it gives an |
| 986 | * indication of the temporal reference |
| 987 | */ |
| 988 | if((!ps_pic_handling->i4_is_gop_closed) |
| 989 | && (ps_pic_handling->i4_first_gop_encoded)) |
| 990 | { |
| 991 | if(!ps_pic_handling->i4_mod_temp_ref_cnt) |
| 992 | { |
| 993 | ps_pic_details->i4_pic_disp_order_no = |
| 994 | (ps_pic_handling->as_pic_stack[ps_pic_handling->i4_stack_count].i4_pic_disp_order_no |
| 995 | + ps_pic_handling->i4_b_in_incomp_subgop) |
| 996 | % (ps_pic_handling->i4_prev_intra_frame_interval); |
| 997 | |
| 998 | } |
| 999 | else |
| 1000 | { |
| 1001 | /* |
| 1002 | * due to force I frame First frame will have only |
| 1003 | * ps_pic_handling->i4_frames_in_fif_gop number of frames |
| 1004 | */ |
| 1005 | ps_pic_details->i4_pic_disp_order_no = |
| 1006 | (ps_pic_handling->as_pic_stack[ps_pic_handling->i4_stack_count].i4_pic_disp_order_no |
| 1007 | + ps_pic_handling->i4_b_in_incomp_subgop) |
| 1008 | % (ps_pic_handling->i4_frames_in_fif_gop); |
| 1009 | ps_pic_handling->i4_mod_temp_ref_cnt--; |
| 1010 | } |
| 1011 | } |
| 1012 | } |
| 1013 | |
| 1014 | /* Giving this to the Codec */ |
| 1015 | *pi4_pic_id = s_pic_details.i4_pic_id; |
| 1016 | *pi4_pic_disp_order_no = s_pic_details.i4_pic_disp_order_no; |
| 1017 | *pe_pic_type = s_pic_details.e_pic_type; |
| 1018 | } |
| 1019 | |
| 1020 | /******************************************************************************* |
| 1021 | * @brief Updates the picture handling state whenever there is changes in input |
| 1022 | * parameter |
| 1023 | * |
| 1024 | ******************************************************************************/ |
| 1025 | static void irc_update_pic_distbn(pic_handling_t *ps_pic_handling, |
| 1026 | WORD32 i4_intra_frm_int, |
| 1027 | WORD32 i4_inter_frm_int, |
| 1028 | WORD32 i4_gop_boundary) |
| 1029 | { |
| 1030 | /* Declarations */ |
| 1031 | WORD32 i4_is_gop_closed; |
| 1032 | WORD32 i, i4_prev_inter_frm_int, i4_max_inter_frm_int, i4_pic_disp_order_no; |
| 1033 | WORD32 i4_b_in_incomp_subgop, i4_extra_p, |
| 1034 | i4_b_in_incomp_subgop_mix_gop,i4_extra_p_mix_gop; |
| 1035 | WORD32 i4_pb_frms_till_prev_p; |
| 1036 | WORD32 ai4_diff_in_frms[MAX_PIC_TYPE]; |
| 1037 | |
| 1038 | /* Initialize the local vars from the state struct */ |
| 1039 | i4_is_gop_closed = ps_pic_handling->i4_is_gop_closed; |
| 1040 | i4_prev_inter_frm_int = ps_pic_handling->i4_inter_frm_int; |
| 1041 | i4_max_inter_frm_int = ps_pic_handling->i4_max_inter_frm_int; |
| 1042 | i4_b_in_incomp_subgop = ps_pic_handling->i4_b_in_incomp_subgop; |
| 1043 | i4_extra_p = ps_pic_handling->i4_extra_p; |
| 1044 | i4_b_in_incomp_subgop_mix_gop = |
| 1045 | ps_pic_handling->i4_b_in_incomp_subgop_mix_gop; |
| 1046 | i4_extra_p_mix_gop = ps_pic_handling->i4_extra_p_mix_gop; |
| 1047 | i4_pic_disp_order_no = ps_pic_handling->i4_pic_disp_order_no; |
| 1048 | |
| 1049 | i4_pb_frms_till_prev_p = (ps_pic_handling->i4_p_count_in_gop |
| 1050 | * i4_prev_inter_frm_int); |
| 1051 | |
| 1052 | /* Check for the validity of the intra_frm_int */ |
| 1053 | if(i4_intra_frm_int <= 0) |
| 1054 | { |
| 1055 | i4_intra_frm_int = ps_pic_handling->i4_intra_frm_int; |
| 1056 | } |
| 1057 | /* Check for the validity of the inter_frm_int */ |
| 1058 | if((i4_inter_frm_int > i4_max_inter_frm_int) || (i4_inter_frm_int < 0)) |
| 1059 | { |
| 1060 | i4_inter_frm_int = ps_pic_handling->i4_inter_frm_int; |
| 1061 | } |
| 1062 | |
| 1063 | /* Keep a copy of the older frms_in_gop */ |
| 1064 | for(i = 0; i < MAX_PIC_TYPE; i++) |
| 1065 | { |
| 1066 | ai4_diff_in_frms[i] = ps_pic_handling->i4_frms_in_cur_gop[i]; |
| 1067 | } |
| 1068 | |
| 1069 | /* Update all the variables which are calculated from the inter_frm_int */ |
| 1070 | |
| 1071 | /* Get the new pic distribution in the gop */ |
| 1072 | find_pic_distbn_in_gop(ps_pic_handling->i4_frms_in_gop, i4_intra_frm_int, |
| 1073 | i4_inter_frm_int, i4_is_gop_closed, |
| 1074 | &i4_b_in_incomp_subgop, &i4_extra_p); |
| 1075 | |
| 1076 | /* Find the other related variables */ |
| 1077 | if(i4_gop_boundary == 0) |
| 1078 | { |
| 1079 | /* |
| 1080 | * Since, the inter frame interval has changed between a gop the |
| 1081 | * current gop will be a mixed gop. So, we need to find the values of |
| 1082 | * the related variables |
| 1083 | */ |
| 1084 | find_pic_distbn_in_gop(ps_pic_handling->i4_frms_in_cur_gop, |
| 1085 | (i4_intra_frm_int - i4_pb_frms_till_prev_p), |
| 1086 | i4_inter_frm_int, i4_is_gop_closed, |
| 1087 | &i4_b_in_incomp_subgop_mix_gop, |
| 1088 | &i4_extra_p_mix_gop); |
| 1089 | |
| 1090 | ps_pic_handling->i4_frms_in_cur_gop[P_PIC] += |
| 1091 | ps_pic_handling->i4_p_count_in_gop; |
| 1092 | ps_pic_handling->i4_frms_in_cur_gop[B_PIC] += |
| 1093 | ps_pic_handling->i4_b_count_in_gop; |
| 1094 | } |
| 1095 | else |
| 1096 | { |
| 1097 | /* |
| 1098 | * Since, the inter_frm_interval has changed at a gop boundary, the |
| 1099 | * new gop will have all the subgops with the new inter_frm_interval |
| 1100 | */ |
| 1101 | for(i = 0; i < MAX_PIC_TYPE; i++) |
| 1102 | { |
| 1103 | ps_pic_handling->i4_frms_in_cur_gop[i] = |
| 1104 | ps_pic_handling->i4_frms_in_gop[i]; |
| 1105 | } |
| 1106 | |
| 1107 | i4_b_in_incomp_subgop_mix_gop = i4_b_in_incomp_subgop; |
| 1108 | i4_extra_p_mix_gop = i4_extra_p; |
| 1109 | } |
| 1110 | |
| 1111 | /* For bit-allocation the rem_frms_in_gop need to be updated */ |
| 1112 | /* Checks needed: |
| 1113 | 1) If the encoding is happening on the same gop as that of the buffering */ |
| 1114 | if(ps_pic_handling->i4_pic_disp_order_no |
| 1115 | >= (i4_max_inter_frm_int - 1- ((!i4_is_gop_closed) |
| 1116 | * ps_pic_handling->i4_b_in_incomp_subgop_mix_gop))) |
| 1117 | { |
| 1118 | for(i = 0; i < MAX_PIC_TYPE; i++) |
| 1119 | { |
| 1120 | ps_pic_handling->i4_rem_frms_in_gop[i] += |
| 1121 | (ps_pic_handling->i4_frms_in_cur_gop[i] |
| 1122 | - ai4_diff_in_frms[i]); |
| 1123 | } |
| 1124 | } |
| 1125 | |
| 1126 | /* Update the vars which will affect the proper filling of the pic_stack */ |
| 1127 | if(i4_pic_disp_order_no == 0) /*Check if redundant*/ |
| 1128 | { |
| 1129 | ps_pic_handling->i4_buf_pic_no = 0; |
| 1130 | } |
| 1131 | else |
| 1132 | { |
| 1133 | ps_pic_handling->i4_buf_pic_no = 1; |
| 1134 | } |
| 1135 | |
| 1136 | ps_pic_handling->i4_b_count_in_subgop = 0; |
| 1137 | |
| 1138 | /* Update the state struct with the new inter_frm_int */ |
| 1139 | ps_pic_handling->i4_inter_frm_int = i4_inter_frm_int; |
| 1140 | ps_pic_handling->i4_intra_frm_int = i4_intra_frm_int; |
| 1141 | ps_pic_handling->i4_b_in_incomp_subgop = i4_b_in_incomp_subgop; |
| 1142 | ps_pic_handling->i4_extra_p = i4_extra_p; |
| 1143 | ps_pic_handling->i4_b_in_incomp_subgop_mix_gop = |
| 1144 | i4_b_in_incomp_subgop_mix_gop; |
| 1145 | ps_pic_handling->i4_extra_p_mix_gop = i4_extra_p_mix_gop; |
| 1146 | |
| 1147 | } |
| 1148 | |
| 1149 | /* ***************************************************************************** |
| 1150 | * @brief Distributes the frames as I, P and B based on intra/inter frame interval. |
| 1151 | * Along with it it fills the number of frames in sub-gop and extra p frame |
| 1152 | * |
| 1153 | ******************************************************************************/ |
| 1154 | static void find_pic_distbn_in_gop(WORD32 i4_frms_in_gop[MAX_PIC_TYPE], |
| 1155 | WORD32 i4_intra_frm_int, |
| 1156 | WORD32 i4_inter_frm_int, |
| 1157 | WORD32 i4_is_gop_closed, |
| 1158 | WORD32 *pi4_b_in_incomp_subgop, |
| 1159 | WORD32 *pi4_extra_p) |
| 1160 | { |
| 1161 | /* |
| 1162 | * Find the pic distribution in the gop depending on the inter and intra |
| 1163 | * frm intervals |
| 1164 | */ |
| 1165 | i4_frms_in_gop[I_PIC] = 1; |
| 1166 | |
| 1167 | /* All I frames */ |
| 1168 | if(i4_intra_frm_int == 1) |
| 1169 | { |
| 1170 | i4_frms_in_gop[P_PIC] = 0; |
| 1171 | i4_frms_in_gop[B_PIC] = 0; |
| 1172 | *pi4_b_in_incomp_subgop = 0; |
| 1173 | *pi4_extra_p = 0; |
| 1174 | } |
| 1175 | else |
| 1176 | { |
| 1177 | if(i4_is_gop_closed) |
| 1178 | { |
| 1179 | i4_frms_in_gop[P_PIC] = ((i4_intra_frm_int - 2) / i4_inter_frm_int) |
| 1180 | + 1; |
| 1181 | |
| 1182 | if((((i4_intra_frm_int - 2) / i4_inter_frm_int) * i4_inter_frm_int) |
| 1183 | == (i4_intra_frm_int - 2)) |
| 1184 | { |
| 1185 | *pi4_extra_p = 1; |
| 1186 | } |
| 1187 | else |
| 1188 | { |
| 1189 | *pi4_extra_p = 0; |
| 1190 | } |
| 1191 | } |
| 1192 | else |
| 1193 | { |
| 1194 | i4_frms_in_gop[P_PIC] = ((i4_intra_frm_int - 1) / i4_inter_frm_int); |
| 1195 | |
| 1196 | *pi4_extra_p = 0; |
| 1197 | } |
| 1198 | |
| 1199 | i4_frms_in_gop[B_PIC] = (i4_intra_frm_int - 1 - i4_frms_in_gop[P_PIC]); |
| 1200 | |
| 1201 | *pi4_b_in_incomp_subgop = (i4_frms_in_gop[B_PIC] - (i4_inter_frm_int - 1) |
| 1202 | * ((i4_intra_frm_int - 1)/ i4_inter_frm_int)); |
| 1203 | } |
| 1204 | } |
| 1205 | |
| 1206 | WORD32 irc_pic_type_get_intra_frame_interval(pic_handling_t *ps_pic_handling) |
| 1207 | { |
| 1208 | |
| 1209 | return (ps_pic_handling->i4_intra_frm_int); |
| 1210 | } |
| 1211 | |
| 1212 | WORD32 irc_pic_type_get_inter_frame_interval(pic_handling_t *ps_pic_handling) |
| 1213 | { |
| 1214 | return (ps_pic_handling->i4_inter_frm_int); |
| 1215 | } |
| 1216 | |
| 1217 | void irc_pic_type_get_rem_frms_in_gop(pic_handling_t *ps_pic_handling, |
| 1218 | WORD32 ai4_rem_frms_in_gop[MAX_PIC_TYPE]) |
| 1219 | { |
| 1220 | memcpy(ai4_rem_frms_in_gop, ps_pic_handling->i4_rem_frms_in_gop, |
| 1221 | sizeof(ps_pic_handling->i4_rem_frms_in_gop)); |
| 1222 | } |
| 1223 | |
| 1224 | WORD32 irc_pic_type_get_frms_in_gop_force_I_frm(pic_handling_t *ps_pic_handling) |
| 1225 | { |
| 1226 | return (ps_pic_handling->i4_frames_in_fif_gop); |
| 1227 | } |
| 1228 | |
| 1229 | void irc_pic_type_get_frms_in_gop(pic_handling_t *ps_pic_handling, |
| 1230 | WORD32 ai4_frms_in_gop[MAX_PIC_TYPE]) |
| 1231 | { |
| 1232 | memcpy(ai4_frms_in_gop, ps_pic_handling->i4_frms_in_cur_gop, |
| 1233 | sizeof(ps_pic_handling->i4_frms_in_cur_gop)); |
| 1234 | } |
| 1235 | |
| 1236 | WORD32 irc_pic_type_get_disp_order_no(pic_handling_t *ps_pic_handling) |
| 1237 | { |
| 1238 | return (ps_pic_handling->i4_pic_disp_order_no); |
| 1239 | } |
| 1240 | |
| 1241 | void irc_set_force_I_frame_flag(pic_handling_t *ps_pic_handling) |
| 1242 | { |
| 1243 | ps_pic_handling->i4_force_I_frame = 1; |
| 1244 | } |
| 1245 | WORD32 irc_get_forced_I_frame_cur_frm_flag(pic_handling_t *ps_pic_handling) |
| 1246 | { |
| 1247 | return (ps_pic_handling->i4_forced_I_frame_cur_frame); |
| 1248 | } |
| 1249 | void irc_reset_forced_I_frame_cur_frm_flag(pic_handling_t *ps_pic_handling) |
| 1250 | { |
| 1251 | ps_pic_handling->i4_forced_I_frame_cur_frame = 0; |
| 1252 | } |
| 1253 | |
| 1254 | /******************************************************************************/ |
| 1255 | /* Functions that work on the encoded frames */ |
| 1256 | /******************************************************************************/ |
| 1257 | |
| 1258 | /****************************************************************************** |
| 1259 | Function Name : irc_update_pic_handling |
| 1260 | Description : Will be called only for the frames to be encoded |
| 1261 | *****************************************************************************/ |
| 1262 | void irc_update_pic_handling(pic_handling_t *ps_pic_handling, |
| 1263 | picture_type_e e_pic_type) |
| 1264 | { |
| 1265 | |
| 1266 | WORD32 i4_max_inter_frm_int; |
| 1267 | WORD32 i; |
| 1268 | |
| 1269 | /* Initializing the local vars with that of the state struct */ |
| 1270 | i4_max_inter_frm_int = ps_pic_handling->i4_max_inter_frm_int; |
| 1271 | |
| 1272 | /* Update the variables working on the output frames */ |
| 1273 | /* Update the stack count */ |
| 1274 | ps_pic_handling->i4_stack_count++; |
| 1275 | |
| 1276 | if(ps_pic_handling->i4_stack_count == (i4_max_inter_frm_int + 1)) |
| 1277 | { |
| 1278 | ps_pic_handling->i4_stack_count = 0; |
| 1279 | } |
| 1280 | |
| 1281 | /* Update the rem_frms_in_gop */ |
| 1282 | ps_pic_handling->i4_rem_frms_in_gop[e_pic_type]--; |
| 1283 | |
| 1284 | /* Assumption : Rem_frms_in_gop needs to be taken care of, for every change in frms */ |
| 1285 | ps_pic_handling->i4_last_frm_in_gop = 0; |
| 1286 | if((ps_pic_handling->i4_rem_frms_in_gop[I_PIC] <= 0) |
| 1287 | && (ps_pic_handling->i4_rem_frms_in_gop[P_PIC] <= 0) |
| 1288 | && (ps_pic_handling->i4_rem_frms_in_gop[B_PIC] <= 0)) |
| 1289 | { |
| 1290 | /* Copy the cur_frms_in_gop to the rem_frm_in_gop */ |
| 1291 | for(i = 0; i < MAX_PIC_TYPE; i++) |
| 1292 | { |
| 1293 | ps_pic_handling->i4_rem_frms_in_gop[i] = |
| 1294 | ps_pic_handling->i4_frms_in_cur_gop[i]; |
| 1295 | } |
| 1296 | |
| 1297 | ps_pic_handling->i4_last_frm_in_gop = 1; |
| 1298 | ps_pic_handling->i4_first_gop_encoded = 1; |
| 1299 | } |
| 1300 | } |
| 1301 | |
| 1302 | WORD32 irc_is_last_frame_in_gop(pic_handling_handle ps_pic_handling) |
| 1303 | { |
| 1304 | return (ps_pic_handling->i4_last_frm_in_gop); |
| 1305 | } |
| 1306 | |
| 1307 | /****************************************************************************** |
| 1308 | Function Name : irc_skip_encoded_frame |
| 1309 | Description : Needs to go to the current pic in the pic_stack. |
| 1310 | If it's B_PIC don't do anything |
| 1311 | If it's a reference picture, push all but the last B_PICs |
| 1312 | in the current subgop one place down (i.e. just copy their |
| 1313 | pic_details) and move the last B_PIC in that subgop to the |
| 1314 | next slot of the skipped picture and convert it's pic_type |
| 1315 | to that of the reference picture |
| 1316 | *****************************************************************************/ |
| 1317 | void irc_skip_encoded_frame(pic_handling_t *ps_pic_handling, |
| 1318 | picture_type_e e_pic_type) |
| 1319 | { |
| 1320 | pic_details_t s_pic_details; |
| 1321 | WORD32 i4_stack_count, i4_next_ref_pic_idx, i4_pic_idx; |
| 1322 | WORD32 i4_max_inter_frm_int, i4_last_b_pic_idx, i4_first_b_pic_idx; |
| 1323 | WORD32 i4_next_pic_idx; |
| 1324 | |
| 1325 | /* State variables used to initialize the local vars (Not to be changed) */ |
| 1326 | i4_stack_count = ps_pic_handling->i4_stack_count; |
| 1327 | i4_next_ref_pic_idx = ps_pic_handling->i4_ref_pic_idx; |
| 1328 | i4_max_inter_frm_int = ps_pic_handling->i4_max_inter_frm_int; |
| 1329 | |
| 1330 | i4_next_pic_idx = ((i4_stack_count + 1) % (i4_max_inter_frm_int + 1)); |
| 1331 | |
| 1332 | /* |
| 1333 | * Check what is the encoded frm_type |
| 1334 | * Changing a B_PIC to a ref_pic is not reqd if |
| 1335 | * there are no B_PICs referring from the skipped ref_pic |
| 1336 | */ |
| 1337 | if(((e_pic_type == P_PIC) || (e_pic_type == I_PIC)) |
| 1338 | && (i4_next_pic_idx != i4_next_ref_pic_idx)) |
| 1339 | { |
| 1340 | /* Go to the last B_PIC before the next_ref_pic */ |
| 1341 | if(i4_next_ref_pic_idx == 0) |
| 1342 | { |
| 1343 | i4_last_b_pic_idx = i4_max_inter_frm_int; |
| 1344 | } |
| 1345 | else |
| 1346 | { |
| 1347 | i4_last_b_pic_idx = (i4_next_ref_pic_idx - 1); |
| 1348 | } |
| 1349 | |
| 1350 | /* Keep a copy of the last B_PIC pic_details */ |
| 1351 | memcpy(&s_pic_details, |
| 1352 | &ps_pic_handling->as_pic_stack[i4_last_b_pic_idx], |
| 1353 | sizeof(pic_details_t)); |
| 1354 | |
| 1355 | i4_pic_idx = i4_last_b_pic_idx; |
| 1356 | i4_first_b_pic_idx = (i4_stack_count + 1) % (i4_max_inter_frm_int + 1); |
| 1357 | |
| 1358 | /* |
| 1359 | * All the B_PICs other than the last one, need to be shifted one place |
| 1360 | * in the stack |
| 1361 | */ |
| 1362 | while((i4_pic_idx != i4_stack_count) |
| 1363 | && (i4_first_b_pic_idx != i4_last_b_pic_idx)) |
| 1364 | { |
| 1365 | if(i4_pic_idx == 0) |
| 1366 | { |
| 1367 | i4_pic_idx = i4_max_inter_frm_int; |
| 1368 | } |
| 1369 | else |
| 1370 | { |
| 1371 | i4_pic_idx--; |
| 1372 | } |
| 1373 | |
| 1374 | memcpy(&ps_pic_handling->as_pic_stack[(i4_pic_idx + 1) |
| 1375 | % (i4_max_inter_frm_int + 1)], |
| 1376 | &ps_pic_handling->as_pic_stack[i4_pic_idx], |
| 1377 | sizeof(pic_details_t)); |
| 1378 | |
| 1379 | } |
| 1380 | |
| 1381 | /* |
| 1382 | * Copy the last B_PIC pic_details to the first B_PIC place and change |
| 1383 | * it's pic type to the ref_PIC |
| 1384 | */ |
| 1385 | /*e_ref_pic_type*/ |
| 1386 | ps_pic_handling->as_pic_stack[i4_first_b_pic_idx].e_pic_type = P_PIC; |
| 1387 | |
| 1388 | ps_pic_handling->as_pic_stack[i4_first_b_pic_idx].i4_pic_disp_order_no = |
| 1389 | s_pic_details.i4_pic_disp_order_no; |
| 1390 | ps_pic_handling->as_pic_stack[i4_first_b_pic_idx].i4_pic_id = |
| 1391 | s_pic_details.i4_pic_id; |
| 1392 | |
| 1393 | /* Change the rem_frms_in_prd so that the update works properly */ |
| 1394 | if(ps_pic_handling->i4_rem_frms_in_gop[B_PIC] > 0) |
| 1395 | { |
| 1396 | ps_pic_handling->i4_rem_frms_in_gop[B_PIC]--; |
| 1397 | ps_pic_handling->i4_rem_frms_in_gop[P_PIC]++; |
| 1398 | } |
| 1399 | } |
| 1400 | |
| 1401 | } |
| 1402 | |
| 1403 | /****************************************************************************** |
| 1404 | Function Name : flush_frame |
| 1405 | Description : Since when a flush frame is called, there will be no valid |
| 1406 | frames after it, the last frame cannot be a B_PIC, as there |
| 1407 | will be no reference frame for it (Input in display order) |
| 1408 | |
| 1409 | So,this fxn needs to go to the last added pic in the pic_stack. |
| 1410 | If it's reference pic don't do anything |
| 1411 | If it's a B_PIC, copy it's pic_details and put it in the |
| 1412 | place of the next reference pic, changing the pic_type to |
| 1413 | P_PIC |
| 1414 | *****************************************************************************/ |
| 1415 | void irc_flush_frame_from_pic_stack(pic_handling_t *ps_pic_handling) |
| 1416 | { |
| 1417 | |
| 1418 | pic_details_t s_prev_pic_details; |
| 1419 | |
| 1420 | /* Get the last entered pic_details (not to be modified here) */ |
| 1421 | WORD32 i4_prev_b_pic_idx = ps_pic_handling->i4_prev_b_pic_idx; |
| 1422 | WORD32 i4_ref_pic_idx = ps_pic_handling->i4_ref_pic_idx; |
| 1423 | WORD32 i4_b_pic_idx = ps_pic_handling->i4_b_pic_idx; |
| 1424 | |
| 1425 | memcpy(&s_prev_pic_details, &ps_pic_handling->s_prev_pic_details, |
| 1426 | sizeof(pic_details_t)); |
| 1427 | |
| 1428 | if(s_prev_pic_details.e_pic_type == B_PIC) |
| 1429 | { |
| 1430 | /* Copy the last B_PIC details to the next reference pic in display order */ |
| 1431 | ps_pic_handling->as_pic_stack[i4_ref_pic_idx].i4_pic_disp_order_no = |
| 1432 | s_prev_pic_details.i4_pic_disp_order_no; |
| 1433 | ps_pic_handling->as_pic_stack[i4_ref_pic_idx].i4_pic_id = |
| 1434 | s_prev_pic_details.i4_pic_id; |
| 1435 | ps_pic_handling->as_pic_stack[i4_ref_pic_idx].e_pic_type = P_PIC; |
| 1436 | |
| 1437 | /* |
| 1438 | * Modify the last B_PIC pic_type, so that codec gets to know when |
| 1439 | * all the buffered frames |
| 1440 | * are flushed |
| 1441 | */ |
| 1442 | ps_pic_handling->as_pic_stack[i4_prev_b_pic_idx].e_pic_type = |
| 1443 | MAX_PIC_TYPE; |
| 1444 | ps_pic_handling->as_pic_stack[i4_prev_b_pic_idx].i4_pic_id = -1; |
| 1445 | ps_pic_handling->as_pic_stack[i4_prev_b_pic_idx].i4_pic_disp_order_no = |
| 1446 | -1; |
| 1447 | } |
| 1448 | else |
| 1449 | { |
| 1450 | /* |
| 1451 | * Modify the next pic_type details in the stack, so that codec gets to |
| 1452 | * know when all the |
| 1453 | * buffered frames are flushed |
| 1454 | */ |
| 1455 | ps_pic_handling->as_pic_stack[i4_ref_pic_idx].e_pic_type = MAX_PIC_TYPE; |
| 1456 | ps_pic_handling->as_pic_stack[i4_ref_pic_idx].i4_pic_id = -1; |
| 1457 | ps_pic_handling->as_pic_stack[i4_ref_pic_idx].i4_pic_disp_order_no = -1; |
| 1458 | |
| 1459 | if(ps_pic_handling->i4_inter_frm_int != 1) |
| 1460 | { |
| 1461 | ps_pic_handling->as_pic_stack[i4_b_pic_idx].e_pic_type = |
| 1462 | MAX_PIC_TYPE; |
| 1463 | ps_pic_handling->as_pic_stack[i4_b_pic_idx].i4_pic_id = -1; |
| 1464 | ps_pic_handling->as_pic_stack[i4_b_pic_idx].i4_pic_disp_order_no = |
| 1465 | -1; |
| 1466 | } |
| 1467 | } |
| 1468 | } |
| 1469 | |
| 1470 | /****************************************************************************** |
| 1471 | Function Name : irc_add_pic_to_stack_re_enc |
| 1472 | Description : In case of a re-enc, we can assume the pictures to be coming |
| 1473 | in the encode order. |
| 1474 | In case of re-encoder basically, there are 2 problematic cases. |
| 1475 | 1)Inter_frm_int is not known to start with |
| 1476 | 2)Inter_frm_int can keep changing |
| 1477 | 3)Intra_frm_int set by the application and that actually in the |
| 1478 | decoded bitstream may be different |
| 1479 | *****************************************************************************/ |
| 1480 | WORD32 irc_add_pic_to_stack_re_enc(pic_handling_t *ps_pic_handling, |
| 1481 | WORD32 i4_enc_pic_id, |
| 1482 | picture_type_e e_pic_type) |
| 1483 | { |
| 1484 | WORD32 i4_b_count_in_subgop; |
| 1485 | WORD32 i4_max_inter_frm_int, i4_inter_frm_int, i4_intra_frm_int; |
| 1486 | WORD32 i4_pic_disp_order_no; |
| 1487 | WORD32 i4_is_gop_closed; |
| 1488 | picture_type_e e_out_pic_type; |
| 1489 | WORD32 i4_b_in_incomp_subgop; |
| 1490 | |
| 1491 | /* Check if a change in intra_frm_int call has been made */ |
| 1492 | if(ps_pic_handling->i4_change_in_intra_frm_int == 1) |
| 1493 | { |
| 1494 | irc_update_pic_distbn(ps_pic_handling, |
| 1495 | ps_pic_handling->i4_new_intra_frm_int, |
| 1496 | ps_pic_handling->i4_inter_frm_int, 1); |
| 1497 | ps_pic_handling->i4_change_in_intra_frm_int = 0; |
| 1498 | } |
| 1499 | |
| 1500 | /* Check if a change in inter_frm_int call has been made */ |
| 1501 | if(ps_pic_handling->i4_change_in_inter_frm_int == 1) |
| 1502 | { |
| 1503 | irc_update_pic_distbn(ps_pic_handling, |
| 1504 | ps_pic_handling->i4_intra_frm_int, |
| 1505 | ps_pic_handling->i4_new_inter_frm_int, 1); |
| 1506 | |
| 1507 | ps_pic_handling->i4_change_in_inter_frm_int = 0; |
| 1508 | } |
| 1509 | |
| 1510 | /* Initialize the local vars with the state vars */ |
| 1511 | i4_b_count_in_subgop = ps_pic_handling->i4_b_count_in_subgop; |
| 1512 | i4_max_inter_frm_int = ps_pic_handling->i4_max_inter_frm_int; |
| 1513 | i4_inter_frm_int = ps_pic_handling->i4_inter_frm_int; |
| 1514 | i4_intra_frm_int = ps_pic_handling->i4_intra_frm_int; |
| 1515 | i4_pic_disp_order_no = ps_pic_handling->i4_pic_disp_order_no; |
| 1516 | i4_is_gop_closed = ps_pic_handling->i4_is_gop_closed; |
| 1517 | i4_b_in_incomp_subgop = ps_pic_handling->i4_b_in_incomp_subgop; |
| 1518 | |
| 1519 | e_out_pic_type = e_pic_type; |
| 1520 | |
| 1521 | /* Initially the rate_control assumes an IPP sequence */ |
| 1522 | if(e_pic_type == B_PIC) |
| 1523 | { |
| 1524 | /* Update the number of B_PICs in a subgop */ |
| 1525 | i4_b_count_in_subgop++; |
| 1526 | |
| 1527 | if(i4_b_count_in_subgop > i4_max_inter_frm_int) |
| 1528 | { |
| 1529 | return (-1); |
| 1530 | } |
| 1531 | |
| 1532 | /* If the number of B_PICs exceed the set inter_frm_int then |
| 1533 | change the inter_frm_int */ |
| 1534 | if(i4_b_count_in_subgop > (i4_inter_frm_int - 1)) |
| 1535 | { |
| 1536 | i4_inter_frm_int = (i4_b_count_in_subgop + 1); |
| 1537 | |
| 1538 | irc_update_pic_distbn(ps_pic_handling, i4_intra_frm_int, |
| 1539 | i4_inter_frm_int, 0); |
| 1540 | } |
| 1541 | } |
| 1542 | else if((e_pic_type == I_PIC) || (e_pic_type == P_PIC)) |
| 1543 | { |
| 1544 | /* If the B_PICs in the prev subgop were fewer than the current |
| 1545 | * (inter_frm_int-1) and none of these conditions occur, it'll mean the |
| 1546 | * decrease in the inter_frm_int |
| 1547 | * 1)End of a GOP |
| 1548 | * 2)Beginning of an OPEN_GOP |
| 1549 | */ |
| 1550 | if((i4_b_count_in_subgop < (i4_inter_frm_int - 1)) |
| 1551 | && !((!i4_is_gop_closed) |
| 1552 | && (i4_b_count_in_subgop |
| 1553 | >= i4_b_in_incomp_subgop)) |
| 1554 | && !((i4_pic_disp_order_no |
| 1555 | + (i4_inter_frm_int - 1 |
| 1556 | - i4_b_count_in_subgop)) |
| 1557 | > i4_intra_frm_int)) |
| 1558 | { |
| 1559 | i4_inter_frm_int = (i4_b_count_in_subgop + 1); |
| 1560 | |
| 1561 | irc_update_pic_distbn(ps_pic_handling, i4_intra_frm_int, |
| 1562 | i4_inter_frm_int, 0); |
| 1563 | } |
| 1564 | |
| 1565 | /* Reset the number of B_PICs in a subgop */ |
| 1566 | i4_b_count_in_subgop = 0; |
| 1567 | } |
| 1568 | |
| 1569 | /* Updation of the frame level vars */ |
| 1570 | i4_pic_disp_order_no++; |
| 1571 | |
| 1572 | /* End of gop condition |
| 1573 | *Two cases can arise : |
| 1574 | *1) The intra_frm_int set by the application is greater than the actual |
| 1575 | * bitstream intra_frm_int (i.e. we will get an I frame before |
| 1576 | * pic_disp_order_no goes to intra_frm_int) |
| 1577 | *2) The intra_frm_int set by the application is smaller than the actual bitstream intra_frm_int |
| 1578 | * (i.e. we won't get an I_PIC even if pic_disp_order_no goes to |
| 1579 | * intra_frm_int) Constraints : |
| 1580 | * 1) I_PIC cannot be changed to B_PIC |
| 1581 | * 2) B_PIC cannot be changed to I_PIC |
| 1582 | */ |
| 1583 | if(i4_pic_disp_order_no >= i4_intra_frm_int) |
| 1584 | { |
| 1585 | if(e_pic_type != B_PIC) |
| 1586 | { |
| 1587 | e_out_pic_type = I_PIC; |
| 1588 | } |
| 1589 | else |
| 1590 | { |
| 1591 | e_out_pic_type = B_PIC; |
| 1592 | ps_pic_handling->i4_rem_frms_in_gop[B_PIC]++; |
| 1593 | ps_pic_handling->i4_frms_in_cur_gop[B_PIC]++; |
| 1594 | ps_pic_handling->i4_frms_in_gop[B_PIC]++; |
| 1595 | } |
| 1596 | } |
| 1597 | else |
| 1598 | { |
| 1599 | if((e_pic_type == I_PIC) && (!ps_pic_handling->i4_is_first_gop)) |
| 1600 | { |
| 1601 | e_out_pic_type = P_PIC; |
| 1602 | ps_pic_handling->i4_rem_frms_in_gop[P_PIC]++; |
| 1603 | ps_pic_handling->i4_frms_in_cur_gop[P_PIC]++; |
| 1604 | ps_pic_handling->i4_frms_in_gop[P_PIC]++; |
| 1605 | } |
| 1606 | else |
| 1607 | { |
| 1608 | e_out_pic_type = e_pic_type; |
| 1609 | } |
| 1610 | } |
| 1611 | |
| 1612 | /* Update the frm_vars at the end of the gop */ |
| 1613 | if(i4_pic_disp_order_no |
| 1614 | == (ps_pic_handling->i4_frms_in_cur_gop[P_PIC] |
| 1615 | + ps_pic_handling->i4_frms_in_cur_gop[B_PIC] |
| 1616 | + 1)) |
| 1617 | { |
| 1618 | i4_pic_disp_order_no = 0; |
| 1619 | ps_pic_handling->i4_is_first_gop = 0; |
| 1620 | } |
| 1621 | |
| 1622 | /* Update the vars working on the encoded pics */ |
| 1623 | if((ps_pic_handling->i4_is_first_gop) |
| 1624 | && (ps_pic_handling->i4_stack_count == -1)) |
| 1625 | { |
| 1626 | ps_pic_handling->i4_coded_pic_no = 0; |
| 1627 | ps_pic_handling->i4_stack_count = 0; |
| 1628 | } |
| 1629 | |
| 1630 | /* Add the pic_details to the pic_stack */ |
| 1631 | ps_pic_handling->as_pic_stack[ps_pic_handling->i4_stack_count].e_pic_type = |
| 1632 | e_out_pic_type; |
| 1633 | ps_pic_handling->as_pic_stack[ps_pic_handling->i4_stack_count].i4_pic_disp_order_no = |
| 1634 | ps_pic_handling->i4_pic_disp_order_no; |
| 1635 | ps_pic_handling->as_pic_stack[ps_pic_handling->i4_stack_count].i4_pic_id = |
| 1636 | i4_enc_pic_id; |
| 1637 | |
| 1638 | /* Writing back those values which need to be updated */ |
| 1639 | ps_pic_handling->i4_inter_frm_int = i4_inter_frm_int; |
| 1640 | ps_pic_handling->i4_pic_disp_order_no = i4_pic_disp_order_no; |
| 1641 | ps_pic_handling->i4_b_count_in_subgop = i4_b_count_in_subgop; |
| 1642 | |
| 1643 | return (0); |
| 1644 | } |