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 | /* Includes */ |
| 23 | /*****************************************************************************/ |
| 24 | |
| 25 | /* System include files */ |
| 26 | #include "stdio.h" |
| 27 | |
| 28 | /* User include files */ |
| 29 | #include "irc_datatypes.h" |
| 30 | #include "irc_common.h" |
| 31 | #include "irc_cntrl_param.h" |
| 32 | #include "irc_mem_req_and_acq.h" |
| 33 | #include "irc_rd_model.h" |
| 34 | #include "irc_est_sad.h" |
| 35 | #include "irc_fixed_point_error_bits.h" |
| 36 | #include "irc_vbr_storage_vbv.h" |
| 37 | #include "irc_picture_type.h" |
| 38 | #include "irc_bit_allocation.h" |
| 39 | #include "irc_mb_model_based.h" |
| 40 | #include "irc_cbr_buffer_control.h" |
| 41 | #include "irc_vbr_str_prms.h" |
| 42 | #include "irc_rate_control_api.h" |
| 43 | #include "irc_rate_control_api_structs.h" |
| 44 | #include "irc_trace_support.h" |
| 45 | |
Harinarayanan K K | 461adb9 | 2015-06-22 13:48:03 +0530 | [diff] [blame] | 46 | |
| 47 | #define MIN(a,b) (((a) < (b)) ? (a) : (b)) |
| 48 | #define MAX(a,b) (((a) > (b)) ? (a) : (b)) |
| 49 | |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 50 | #define DEV_Q 4 /*Q format(Shift) for Deviation range factor */ |
| 51 | #define HI_DEV_FCTR 22 /* 1.4*16 */ |
| 52 | #define LO_DEV_FCTR 12 /* 0.75*16 */ |
| 53 | #define GET_HI_DEV_QP(Qprev) (( ((WORD32) Qprev)*HI_DEV_FCTR + (1<<(DEV_Q-1)))>>DEV_Q) |
| 54 | #define GET_LO_DEV_QP(Qprev) (( ((WORD32) Qprev)*LO_DEV_FCTR + (1<<(DEV_Q-1)))>>DEV_Q) |
| 55 | #define CLIP_QP(Qc, hi_d, lo_d) (((Qc) < (lo_d))?((lo_d)):(((Qc) > (hi_d))?(hi_d):(Qc))) |
| 56 | |
| 57 | /*****************************************************************************/ |
| 58 | /* Restricts the quantization parameter variation within delta */ |
| 59 | /*****************************************************************************/ |
| 60 | /* static WORD32 restrict_swing(WORD32 cur_qp, WORD32 prev_qp, WORD32 delta_qp) |
| 61 | { |
| 62 | if((cur_qp) - (prev_qp) > (delta_qp)) (cur_qp) = (prev_qp) + (delta_qp) ; |
| 63 | if((prev_qp) - (cur_qp) > (delta_qp)) (cur_qp) = (prev_qp) - (delta_qp) ; |
| 64 | return cur_qp; |
| 65 | }*/ |
| 66 | |
| 67 | /***************************************************************************** |
| 68 | Function Name : rate_control_get_init_free_memtab |
| 69 | Description : Takes or gives memtab |
| 70 | Inputs : pps_rate_control_api - pointer to RC api pointer |
| 71 | ps_memtab - Memtab pointer |
| 72 | i4_use_base - Set during init, else 0 |
| 73 | i4_fill_base - Set during free, else 0 |
| 74 | *****************************************************************************/ |
| 75 | WORD32 irc_rate_control_num_fill_use_free_memtab(rate_control_handle *pps_rate_control_api, |
| 76 | itt_memtab_t *ps_memtab, |
| 77 | ITT_FUNC_TYPE_E e_func_type) |
| 78 | { |
| 79 | WORD32 i4_mem_tab_idx = 0, i; |
Martin Storsjo | 7313602 | 2015-06-23 14:51:06 +0300 | [diff] [blame] | 80 | rate_control_api_t s_temp_rc_api; |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 81 | |
| 82 | /* |
| 83 | * Hack for al alloc, during which we dont have any state memory. |
| 84 | * Dereferencing can cause issues |
| 85 | */ |
| 86 | if(e_func_type == GET_NUM_MEMTAB || e_func_type == FILL_MEMTAB) |
| 87 | (*pps_rate_control_api) = &s_temp_rc_api; |
| 88 | |
| 89 | /*for src rate control state structure*/ |
| 90 | if(e_func_type != GET_NUM_MEMTAB) |
| 91 | { |
| 92 | fill_memtab(&ps_memtab[i4_mem_tab_idx], sizeof(rate_control_api_t), |
| 93 | ALIGN_128_BYTE, PERSISTENT, DDR); |
| 94 | use_or_fill_base(&ps_memtab[0], (void**)pps_rate_control_api, |
| 95 | e_func_type); |
| 96 | } |
| 97 | i4_mem_tab_idx++; |
| 98 | |
| 99 | /* Get the memory requirement of lower modules */ |
| 100 | i4_mem_tab_idx += irc_ba_num_fill_use_free_memtab( |
| 101 | &pps_rate_control_api[0]->ps_bit_allocation, |
| 102 | &ps_memtab[i4_mem_tab_idx], e_func_type); |
| 103 | |
| 104 | i4_mem_tab_idx += irc_cbr_buffer_num_fill_use_free_memtab( |
| 105 | &pps_rate_control_api[0]->ps_cbr_buffer, |
| 106 | &ps_memtab[i4_mem_tab_idx], e_func_type); |
| 107 | |
| 108 | i4_mem_tab_idx += irc_est_sad_num_fill_use_free_memtab( |
| 109 | &pps_rate_control_api[0]->ps_est_sad, |
| 110 | &ps_memtab[i4_mem_tab_idx], e_func_type); |
| 111 | |
| 112 | i4_mem_tab_idx += irc_mbrc_num_fill_use_free_memtab( |
| 113 | &pps_rate_control_api[0]->ps_mb_rate_control, |
| 114 | &ps_memtab[i4_mem_tab_idx], e_func_type); |
| 115 | |
| 116 | i4_mem_tab_idx += irc_vbr_vbv_num_fill_use_free_memtab( |
| 117 | &pps_rate_control_api[0]->ps_vbr_storage_vbv, |
| 118 | &ps_memtab[i4_mem_tab_idx], e_func_type); |
| 119 | |
| 120 | for(i = 0; i < MAX_PIC_TYPE; i++) |
| 121 | { |
| 122 | i4_mem_tab_idx += irc_rd_model_num_fill_use_free_memtab( |
| 123 | &pps_rate_control_api[0]->aps_rd_model[i], |
| 124 | &ps_memtab[i4_mem_tab_idx], e_func_type); |
| 125 | } |
| 126 | i4_mem_tab_idx += irc_pic_handling_num_fill_use_free_memtab( |
| 127 | &pps_rate_control_api[0]->ps_pic_handling, |
| 128 | &ps_memtab[i4_mem_tab_idx], e_func_type); |
| 129 | |
| 130 | return (i4_mem_tab_idx); |
| 131 | } |
| 132 | |
| 133 | /***************************************************************************** |
| 134 | Function Name : irc_initialise_rate_control |
| 135 | Description : Initialise the rate control structure |
| 136 | Inputs : ps_rate_control_api - api struct |
| 137 | e_rate_control_type - VBR, CBR (NLDRC/LDRC), VBR_STREAMING |
| 138 | u1_is_mb_level_rc_on - enabling mb level RC |
| 139 | u4_avg_bit_rate - bit rate to achieved across the entire |
| 140 | file size |
| 141 | u4_peak_bit_rate - max possible drain rate |
| 142 | u4_frame_rate - number of frames in 1000 seconds |
| 143 | u4_intra_frame_interval - num frames between two I frames |
| 144 | *au1_init_qp - init_qp for I,P,B |
| 145 | *****************************************************************************/ |
| 146 | void irc_initialise_rate_control(rate_control_api_t *ps_rate_control_api, |
| 147 | rc_type_e e_rate_control_type, |
| 148 | UWORD8 u1_is_mb_level_rc_on, |
| 149 | UWORD32 u4_avg_bit_rate, |
| 150 | UWORD32 *pu4_peak_bit_rate, |
| 151 | UWORD32 u4_min_bit_rate, |
| 152 | UWORD32 u4_frame_rate, |
| 153 | UWORD32 u4_max_delay, |
| 154 | UWORD32 u4_intra_frame_interval, |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 155 | WORD32 i4_inter_frm_int, |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 156 | UWORD8 *pu1_init_qp, |
| 157 | UWORD32 u4_max_vbv_buff_size, |
| 158 | WORD32 i4_max_inter_frm_int, |
| 159 | WORD32 i4_is_gop_closed, |
| 160 | UWORD8 *pu1_min_max_qp, |
| 161 | WORD32 i4_use_est_intra_sad, |
| 162 | UWORD32 u4_src_ticks, |
| 163 | UWORD32 u4_tgt_ticks) |
| 164 | { |
| 165 | WORD32 i; |
| 166 | UWORD32 u4_frms_in_delay_prd = (u4_frame_rate * u4_max_delay) / 1000000; |
| 167 | ps_rate_control_api->e_rc_type = e_rate_control_type; |
| 168 | ps_rate_control_api->u1_is_mb_level_rc_on = u1_is_mb_level_rc_on; |
| 169 | |
| 170 | trace_printf((const WORD8*)"RC type = %d\n", e_rate_control_type); |
| 171 | |
| 172 | /* Set the avg_bitrate_changed flag for each pic_type to 0 */ |
| 173 | for(i = 0; i < MAX_PIC_TYPE; i++) |
| 174 | { |
| 175 | ps_rate_control_api->au1_avg_bitrate_changed[i] = 0; |
| 176 | } |
| 177 | |
| 178 | /* Initialize the pic_handling module */ |
| 179 | irc_init_pic_handling(ps_rate_control_api->ps_pic_handling, |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 180 | (WORD32)u4_intra_frame_interval, |
| 181 | i4_inter_frm_int, i4_max_inter_frm_int, |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 182 | i4_is_gop_closed); |
| 183 | |
| 184 | /*** Initialize the rate control modules ***/ |
| 185 | if(ps_rate_control_api->e_rc_type != CONST_QP) |
| 186 | { |
| 187 | UWORD32 au4_num_pics_in_delay_prd[MAX_PIC_TYPE]; |
| 188 | |
| 189 | /* Initialize the model parameter structures */ |
| 190 | for(i = 0; i < MAX_PIC_TYPE; i++) |
| 191 | { |
| 192 | irc_init_frm_rc_rd_model(ps_rate_control_api->aps_rd_model[i], |
| 193 | MAX_FRAMES_MODELLED); |
| 194 | } |
| 195 | |
| 196 | /* Initialize the buffer mechanism */ |
| 197 | if((ps_rate_control_api->e_rc_type == VBR_STORAGE) |
| 198 | || (ps_rate_control_api->e_rc_type |
| 199 | == VBR_STORAGE_DVD_COMP)) |
| 200 | { |
| 201 | /* Assuming both the peak bit rates are same for a VBR_STORAGE and |
| 202 | VBR_STORAGE_DVD_COMP */ |
| 203 | if(pu4_peak_bit_rate[0] != pu4_peak_bit_rate[1]) |
| 204 | { |
| 205 | trace_printf((const WORD8*)"For VBR_STORAGE and VBR_STORAGE_DVD_COMP the peak bit rates should be same\n"); |
| 206 | } |
| 207 | irc_init_vbr_vbv(ps_rate_control_api->ps_vbr_storage_vbv, |
| 208 | (WORD32)pu4_peak_bit_rate[0], |
| 209 | (WORD32)u4_frame_rate, |
| 210 | (WORD32)u4_max_vbv_buff_size); |
| 211 | } |
| 212 | else if(ps_rate_control_api->e_rc_type == CBR_NLDRC) |
| 213 | { |
| 214 | UWORD32 u4_avg_bit_rate_copy[MAX_NUM_DRAIN_RATES]; |
| 215 | for(i = 0; i < MAX_NUM_DRAIN_RATES; i++) |
| 216 | { |
| 217 | u4_avg_bit_rate_copy[i] = u4_avg_bit_rate; |
| 218 | } |
| 219 | /* In case of CBR the num pics in delay is ignored */ |
| 220 | for(i = 0; i < MAX_PIC_TYPE; i++) |
| 221 | au4_num_pics_in_delay_prd[i] = 0; |
| 222 | |
| 223 | irc_init_cbr_buffer(ps_rate_control_api->ps_cbr_buffer, |
| 224 | u4_max_delay, u4_frame_rate, |
| 225 | (WORD32 *)u4_avg_bit_rate_copy, |
| 226 | au4_num_pics_in_delay_prd, |
| 227 | u4_max_vbv_buff_size); |
| 228 | } |
| 229 | else if(ps_rate_control_api->e_rc_type == VBR_STREAMING) |
| 230 | { |
| 231 | irc_init_vbv_str_prms(&ps_rate_control_api->s_vbr_str_prms, |
| 232 | u4_intra_frame_interval, u4_src_ticks, |
| 233 | u4_tgt_ticks, u4_frms_in_delay_prd); |
| 234 | |
| 235 | /* Get the number of pics of each type in delay period */ |
| 236 | irc_get_vsp_num_pics_in_dly_prd( |
| 237 | &ps_rate_control_api->s_vbr_str_prms, |
| 238 | au4_num_pics_in_delay_prd); |
| 239 | |
| 240 | irc_init_cbr_buffer(ps_rate_control_api->ps_cbr_buffer, |
| 241 | u4_max_delay, u4_frame_rate, |
| 242 | (WORD32 *)pu4_peak_bit_rate, |
| 243 | au4_num_pics_in_delay_prd, |
| 244 | u4_max_vbv_buff_size); |
| 245 | } |
| 246 | |
| 247 | /* Initialize the SAD estimation module */ |
| 248 | irc_init_est_sad(ps_rate_control_api->ps_est_sad, i4_use_est_intra_sad); |
| 249 | |
| 250 | /* Initialize the bit allocation module according to VBR or CBR */ |
| 251 | if((ps_rate_control_api->e_rc_type == VBR_STORAGE) |
| 252 | || (ps_rate_control_api->e_rc_type == VBR_STREAMING) |
| 253 | || (ps_rate_control_api->e_rc_type |
| 254 | == VBR_STORAGE_DVD_COMP)) |
| 255 | { |
| 256 | irc_ba_init_bit_allocation(ps_rate_control_api->ps_bit_allocation, |
| 257 | ps_rate_control_api->ps_pic_handling, |
| 258 | VBR_BIT_ALLOC_PERIOD, u4_avg_bit_rate, |
| 259 | u4_frame_rate, |
| 260 | (WORD32 *)pu4_peak_bit_rate, |
| 261 | u4_min_bit_rate); |
| 262 | } |
| 263 | else if(ps_rate_control_api->e_rc_type == CBR_NLDRC) |
| 264 | { |
| 265 | irc_ba_init_bit_allocation(ps_rate_control_api->ps_bit_allocation, |
| 266 | ps_rate_control_api->ps_pic_handling, |
| 267 | CBR_BIT_ALLOC_PERIOD, u4_avg_bit_rate, |
| 268 | u4_frame_rate, |
| 269 | (WORD32 *)pu4_peak_bit_rate, |
| 270 | u4_min_bit_rate); |
| 271 | } |
| 272 | |
| 273 | /* |
| 274 | * u1_scd_detected will be initialized to 1 when a Scene change is |
| 275 | * detected |
| 276 | */ |
| 277 | ps_rate_control_api->u1_scd_detected = 0; |
| 278 | } |
| 279 | |
| 280 | /* Initialize the init_qp */ |
| 281 | for(i = 0; i < MAX_PIC_TYPE; i++) |
| 282 | { |
| 283 | ps_rate_control_api->au1_init_qp[i] = pu1_init_qp[i]; |
| 284 | ps_rate_control_api->au1_prev_frm_qp[i] = pu1_init_qp[i]; |
| 285 | ps_rate_control_api->au1_min_max_qp[(i << 1)] = |
| 286 | pu1_min_max_qp[(i << 1)]; |
| 287 | ps_rate_control_api->au1_min_max_qp[(i << 1) + 1] = pu1_min_max_qp[(i |
| 288 | << 1) + 1]; |
| 289 | } |
| 290 | |
| 291 | /* Initialize the is_first_frm_encoded */ |
| 292 | for(i = 0; i < MAX_PIC_TYPE; i++) |
| 293 | { |
| 294 | ps_rate_control_api->au1_is_first_frm_coded[i] = 0; |
| 295 | } |
| 296 | ps_rate_control_api->u1_is_first_frm = 1; |
| 297 | |
| 298 | /* |
| 299 | * Control flag for delayed impact after a change in peak bitrate has been |
| 300 | * made |
| 301 | */ |
| 302 | ps_rate_control_api->u4_frms_in_delay_prd_for_peak_bit_rate_change = 0; |
| 303 | for(i = 0; i < MAX_NUM_DRAIN_RATES; i++) |
| 304 | { |
| 305 | ps_rate_control_api->au4_new_peak_bit_rate[i] = pu4_peak_bit_rate[i]; |
| 306 | } |
| 307 | |
| 308 | /* Initialize the mb level rate control module */ |
| 309 | irc_init_mb_level_rc(ps_rate_control_api->ps_mb_rate_control); |
| 310 | ps_rate_control_api->i4_prev_frm_est_bits = u4_avg_bit_rate * 1000 |
| 311 | / u4_frame_rate; |
| 312 | |
| 313 | ps_rate_control_api->prev_ref_pic_type = I_PIC; |
| 314 | } |
| 315 | |
| 316 | /****************************************************************************** |
| 317 | *Description : calls irc_add_pic_to_stack |
| 318 | ******************************************************************************/ |
| 319 | void irc_add_picture_to_stack(rate_control_api_t *rate_control_api, |
| 320 | WORD32 i4_enc_pic_id) |
| 321 | { |
| 322 | /* Call the routine to add the pic to stack in encode order */ |
| 323 | irc_add_pic_to_stack(rate_control_api->ps_pic_handling, i4_enc_pic_id); |
| 324 | } |
| 325 | |
| 326 | void irc_add_picture_to_stack_re_enc(rate_control_api_t *rate_control_api, |
| 327 | WORD32 i4_enc_pic_id, |
| 328 | picture_type_e e_pic_type) |
| 329 | { |
| 330 | /* |
| 331 | * In case of a re-encoder, the pics will come in the encode order itself. |
| 332 | * So, there is no need to buffer the pics up |
| 333 | */ |
| 334 | irc_add_pic_to_stack_re_enc(rate_control_api->ps_pic_handling, |
| 335 | i4_enc_pic_id, e_pic_type); |
| 336 | } |
| 337 | |
| 338 | /******************************************************************************* |
| 339 | Description : Decides the picture type based on the state |
| 340 | ******************************************************************************/ |
| 341 | void irc_get_picture_details(rate_control_handle rate_control_api, |
| 342 | WORD32 *pi4_pic_id, |
| 343 | WORD32 *pi4_pic_disp_order_no, |
| 344 | picture_type_e *pe_pic_type) |
| 345 | { |
| 346 | /* Call to get the pic_details */ |
| 347 | irc_get_pic_from_stack(rate_control_api->ps_pic_handling, pi4_pic_id, |
| 348 | pi4_pic_disp_order_no, pe_pic_type); |
| 349 | } |
| 350 | |
| 351 | /******************************************************************************* |
| 352 | * Description : Gets the frame level qp for the given picture type |
| 353 | ******************************************************************************/ |
| 354 | UWORD8 irc_get_frame_level_qp(rate_control_api_t *ps_rate_control_api, |
| 355 | picture_type_e e_pic_type, |
| 356 | WORD32 i4_ud_max_bits) |
| 357 | { |
| 358 | UWORD8 u1_frame_qp, i; |
| 359 | |
| 360 | if((ps_rate_control_api->e_rc_type != VBR_STORAGE) |
| 361 | && (ps_rate_control_api->e_rc_type != VBR_STORAGE_DVD_COMP) |
| 362 | && (ps_rate_control_api->e_rc_type != CBR_NLDRC) |
| 363 | && (ps_rate_control_api->e_rc_type != CONST_QP) |
| 364 | && (ps_rate_control_api->e_rc_type != VBR_STREAMING)) |
| 365 | { |
| 366 | trace_printf((const WORD8*)(const WORD8*)" Only VBR,NLDRC and CONST QP supported for now \n"); |
| 367 | return (0); |
| 368 | } |
| 369 | |
| 370 | if(ps_rate_control_api->e_rc_type != CONST_QP) |
| 371 | { |
| 372 | UWORD8 u1_is_first_frm_coded = 1; |
| 373 | |
| 374 | /* Check whether at least one frame of a each picture type gets encoded*/ |
| 375 | /* Check whether it is an IPP or IPB kind of encoding */ |
| 376 | if((ps_rate_control_api->au1_is_first_frm_coded[I_PIC] |
| 377 | && ps_rate_control_api->au1_is_first_frm_coded[P_PIC]) |
| 378 | || ((irc_pic_type_get_intra_frame_interval( |
| 379 | ps_rate_control_api->ps_pic_handling) |
| 380 | == 1) |
| 381 | && (ps_rate_control_api->au1_is_first_frm_coded[I_PIC]))) |
| 382 | { |
| 383 | if(e_pic_type != B_PIC) |
| 384 | u1_is_first_frm_coded = 1; |
| 385 | else |
| 386 | { |
| 387 | for(i = 0; i < MAX_PIC_TYPE; i++) |
| 388 | { |
| 389 | u1_is_first_frm_coded &= |
| 390 | ps_rate_control_api->au1_is_first_frm_coded[i]; |
| 391 | } |
| 392 | } |
| 393 | } |
| 394 | else |
| 395 | { |
| 396 | u1_is_first_frm_coded = 0; |
| 397 | } |
| 398 | |
| 399 | if(u1_is_first_frm_coded) |
| 400 | { |
| 401 | WORD32 i4_cur_est_texture_bits, i4_cur_est_header_bits; |
| 402 | WORD32 i4_cur_est_bits; |
| 403 | UWORD32 u4_estimated_sad; |
| 404 | |
| 405 | /* Force I frame updation of rem_bits_in_frame*/ |
| 406 | if(irc_get_forced_I_frame_cur_frm_flag( |
| 407 | ps_rate_control_api->ps_pic_handling) == 1) |
| 408 | { |
| 409 | irc_ba_change_rem_bits_in_prd_at_force_I_frame( |
| 410 | ps_rate_control_api->ps_bit_allocation, |
| 411 | ps_rate_control_api->ps_pic_handling); |
| 412 | irc_reset_forced_I_frame_cur_frm_flag( |
| 413 | ps_rate_control_api->ps_pic_handling); |
| 414 | } |
| 415 | |
| 416 | /* Get the estimated texture bits allocated for the current frame*/ |
| 417 | i4_cur_est_texture_bits = irc_ba_get_cur_frm_est_texture_bits( |
| 418 | ps_rate_control_api->ps_bit_allocation, |
| 419 | ps_rate_control_api->aps_rd_model, |
| 420 | ps_rate_control_api->ps_est_sad, |
| 421 | ps_rate_control_api->ps_pic_handling, e_pic_type); |
| 422 | |
| 423 | /* Get the estimated header bits*/ |
| 424 | i4_cur_est_header_bits = irc_ba_get_cur_frm_est_header_bits( |
| 425 | ps_rate_control_api->ps_bit_allocation, e_pic_type); |
| 426 | |
| 427 | /* Total estimated bits */ |
| 428 | i4_cur_est_bits = i4_cur_est_header_bits + i4_cur_est_texture_bits; |
| 429 | |
| 430 | trace_printf((const WORD8*)"ft %d, etb = %d, eb %d, ", e_pic_type, |
| 431 | i4_cur_est_texture_bits, i4_cur_est_bits); |
| 432 | |
| 433 | /* Threshold the estimated bits based on the buffer fullness*/ |
| 434 | if(ps_rate_control_api->e_rc_type == VBR_STORAGE) |
| 435 | { |
| 436 | WORD32 i4_cur_frm_max_bit_possible; |
| 437 | i4_cur_frm_max_bit_possible = irc_get_max_target_bits( |
| 438 | ps_rate_control_api->ps_vbr_storage_vbv); |
| 439 | |
| 440 | if(i4_cur_est_bits > i4_cur_frm_max_bit_possible) |
| 441 | { |
| 442 | /* Assuming header would consume the same amount of bits */ |
| 443 | i4_cur_est_texture_bits = i4_cur_frm_max_bit_possible |
| 444 | - i4_cur_est_header_bits; |
| 445 | } |
| 446 | } |
| 447 | else if(ps_rate_control_api->e_rc_type == VBR_STORAGE_DVD_COMP) |
| 448 | { |
| 449 | WORD32 i4_rem_bits_in_gop, i4_rem_frms_in_gop, i; |
| 450 | WORD32 i4_cur_frm_max_bit_possible, |
| 451 | ai4_rem_frms_in_gop[MAX_PIC_TYPE]; |
| 452 | irc_pic_type_get_rem_frms_in_gop( |
| 453 | ps_rate_control_api->ps_pic_handling, |
| 454 | ai4_rem_frms_in_gop); |
| 455 | i4_rem_bits_in_gop = irc_get_rem_bits_in_period( |
| 456 | ps_rate_control_api); |
| 457 | i4_rem_frms_in_gop = 0; |
| 458 | for(i = 0; i < MAX_PIC_TYPE; i++) |
| 459 | i4_rem_frms_in_gop += ai4_rem_frms_in_gop[i]; |
| 460 | |
| 461 | /* Threshold the bits based on estimated buffer fullness */ |
| 462 | i4_cur_frm_max_bit_possible = irc_get_max_tgt_bits_dvd_comp( |
| 463 | ps_rate_control_api->ps_vbr_storage_vbv, |
| 464 | i4_rem_bits_in_gop, i4_rem_frms_in_gop, |
| 465 | e_pic_type); |
| 466 | |
| 467 | if(i4_cur_est_bits > i4_cur_frm_max_bit_possible) |
| 468 | { |
| 469 | /* Assuming header would consume the same amount of bits */ |
| 470 | i4_cur_est_texture_bits = i4_cur_frm_max_bit_possible |
| 471 | - i4_cur_est_header_bits; |
| 472 | |
| 473 | } |
| 474 | } |
| 475 | else if(ps_rate_control_api->e_rc_type == CBR_NLDRC) |
| 476 | { |
| 477 | WORD32 i4_cur_frm_bits_acc_buffer = |
| 478 | irc_cbr_buffer_constraint_check( |
| 479 | ps_rate_control_api->ps_cbr_buffer, |
| 480 | i4_cur_est_bits, e_pic_type); |
| 481 | |
| 482 | /* Assuming the header would consume the same amount of bits */ |
| 483 | i4_cur_est_texture_bits = i4_cur_frm_bits_acc_buffer |
| 484 | - i4_cur_est_header_bits; |
| 485 | |
| 486 | } |
| 487 | else if(ps_rate_control_api->e_rc_type == VBR_STREAMING) |
| 488 | { |
| 489 | WORD32 i4_cur_frm_bits_acc_buffer = |
| 490 | irc_vbr_stream_buffer_constraint_check( |
| 491 | ps_rate_control_api->ps_cbr_buffer, |
| 492 | i4_cur_est_bits, e_pic_type); |
| 493 | |
| 494 | /* Assuming the header would consume the same amount of bits */ |
| 495 | i4_cur_est_texture_bits = i4_cur_frm_bits_acc_buffer |
| 496 | - i4_cur_est_header_bits; |
| 497 | } |
| 498 | |
| 499 | trace_printf((const WORD8*)"emtb = %d, ", i4_cur_est_texture_bits); |
| 500 | |
| 501 | /* |
| 502 | * If the estimated texture bits go to values less than zero |
| 503 | * due to buffer underflow, make the estimated target bits to go |
| 504 | * to zero |
| 505 | */ |
| 506 | if(i4_cur_est_texture_bits < 0) |
| 507 | i4_cur_est_texture_bits = 0; |
| 508 | |
| 509 | ps_rate_control_api->i4_prev_frm_est_bits = (i4_cur_est_texture_bits |
| 510 | + i4_cur_est_header_bits); |
| 511 | |
| 512 | /* Clip est_texture_bits according to the user-defined max value */ |
| 513 | if((i4_cur_est_texture_bits |
| 514 | > (i4_ud_max_bits - i4_cur_est_header_bits)) |
| 515 | && (e_pic_type != I_PIC)) |
| 516 | { |
| 517 | i4_cur_est_texture_bits = (i4_ud_max_bits |
| 518 | - i4_cur_est_header_bits); |
| 519 | trace_printf((const WORD8*)"udcb = %d, ", |
| 520 | i4_ud_max_bits - i4_cur_est_header_bits); |
| 521 | } |
| 522 | |
| 523 | /* Calculate the estimated SAD for corresponding frame*/ |
| 524 | u4_estimated_sad = irc_get_est_sad(ps_rate_control_api->ps_est_sad, |
| 525 | e_pic_type); |
| 526 | |
| 527 | /* Query the model for the Qp for the corresponding frame*/ |
| 528 | |
| 529 | /* |
| 530 | * The check is because the model gives a negative QP when the |
| 531 | * i4_cur_est_texture_bits is less than or equal to 0 |
| 532 | * [This is a bug in the model]. As a temporary fix, the frame QP |
| 533 | * is being set to the max QP allowed |
| 534 | */ |
| 535 | if(i4_cur_est_texture_bits > 0) |
| 536 | { |
| 537 | u1_frame_qp = irc_find_qp_for_target_bits( |
| 538 | ps_rate_control_api->aps_rd_model[e_pic_type], |
| 539 | i4_cur_est_texture_bits, |
| 540 | u4_estimated_sad, |
| 541 | ps_rate_control_api->au1_min_max_qp[(e_pic_type |
| 542 | << 1)], |
| 543 | ps_rate_control_api->au1_min_max_qp[(e_pic_type |
| 544 | << 1) + 1]); |
| 545 | } |
| 546 | else |
| 547 | { |
| 548 | u1_frame_qp = ps_rate_control_api->au1_min_max_qp[(e_pic_type |
| 549 | << 1) + 1]; |
| 550 | } |
| 551 | |
| 552 | trace_printf((const WORD8*)"ehb %d, etb %d, fqp %d, es %d, eb %d, ", |
| 553 | i4_cur_est_header_bits, i4_cur_est_texture_bits, |
| 554 | u1_frame_qp, u4_estimated_sad, i4_cur_est_bits); |
| 555 | |
| 556 | /* Restricting the QP swing if the average bit rate has changed */ |
| 557 | if(ps_rate_control_api->au1_avg_bitrate_changed[e_pic_type] == 0) |
| 558 | { |
| 559 | WORD32 prev_qp; |
| 560 | WORD32 hi_dev_qp, lo_dev_qp; |
| 561 | /* Restricting the qp swing */ |
| 562 | prev_qp = ps_rate_control_api->au1_prev_frm_qp[ps_rate_control_api->prev_ref_pic_type]; |
| 563 | |
| 564 | if(ps_rate_control_api->prev_ref_pic_type != e_pic_type) |
| 565 | { |
| 566 | if(e_pic_type == I_PIC) |
| 567 | { |
| 568 | /* |
| 569 | * Constrain I-frame QP to be within specified limit of |
| 570 | * prev_ref_qp/Kp |
| 571 | */ |
| 572 | prev_qp = (P_TO_I_RATIO * prev_qp + (1 << (K_Q - 1))) |
| 573 | >> (K_Q); |
| 574 | } |
| 575 | else if(e_pic_type == P_PIC) |
| 576 | { |
| 577 | /* |
| 578 | * Constrain P-frame QP to be within specified limit of |
| 579 | * Kp*prev_ref_qp |
| 580 | */ |
| 581 | prev_qp = (I_TO_P_RATIO * prev_qp + (1 << (K_Q - 1))) |
| 582 | >> (K_Q); |
| 583 | } |
| 584 | else if(ps_rate_control_api->prev_ref_pic_type == P_PIC) |
| 585 | { |
| 586 | /* current frame is B-pic */ |
| 587 | /* Constrain B-frame QP to be within specified limit of |
| 588 | * prev_ref_qp/Kb |
| 589 | */ |
| 590 | prev_qp = (P_TO_B_RATIO * prev_qp + (1 << (K_Q - 1))) |
| 591 | >> (K_Q); |
| 592 | } |
| 593 | else /* if(ps_rate_control_api->prev_ref_pic_type == I_PIC*/ |
| 594 | { |
| 595 | /* current frame is B-pic */ |
| 596 | /* |
| 597 | * Constrain B-frame QP to be within specified limit of |
| 598 | * prev_ref_qp/Kb |
| 599 | */ |
| 600 | prev_qp = (P_TO_B_RATIO * I_TO_P_RATIO * prev_qp |
| 601 | + (1 << (K_Q + K_Q - 1))) |
| 602 | >> (K_Q + K_Q); |
| 603 | } |
| 604 | } |
| 605 | |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 606 | /* |
Harinarayanan K K | 461adb9 | 2015-06-22 13:48:03 +0530 | [diff] [blame] | 607 | * Due to the inexact nature of translation tables, QP may |
| 608 | * get locked at some values. This is because of the inexactness of |
| 609 | * the tables causing a change of +-1 in back and forth translations. |
| 610 | * In that case, if we restrict the QP swing to +-1, we will get |
| 611 | * the lock up condition. Hence we make it such that we will have |
| 612 | * a swing of atleast +- 2 from prev_qp |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 613 | */ |
Harinarayanan K K | 461adb9 | 2015-06-22 13:48:03 +0530 | [diff] [blame] | 614 | |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 615 | lo_dev_qp = GET_LO_DEV_QP(prev_qp); |
Harinarayanan K K | 461adb9 | 2015-06-22 13:48:03 +0530 | [diff] [blame] | 616 | lo_dev_qp = MIN(lo_dev_qp, prev_qp - 2); |
| 617 | lo_dev_qp = MAX(lo_dev_qp, ps_rate_control_api->au1_min_max_qp[(e_pic_type << 1)]); |
| 618 | |
| 619 | hi_dev_qp = GET_HI_DEV_QP(prev_qp); |
| 620 | hi_dev_qp = MAX(hi_dev_qp, prev_qp + 2); |
| 621 | hi_dev_qp = MIN(hi_dev_qp, ps_rate_control_api->au1_min_max_qp[(e_pic_type << 1) + 1]); |
| 622 | |
| 623 | u1_frame_qp = (UWORD8)CLIP_QP((WORD32)u1_frame_qp, hi_dev_qp , lo_dev_qp); |
| 624 | |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 625 | } |
| 626 | else |
| 627 | { |
| 628 | ps_rate_control_api->au1_avg_bitrate_changed[e_pic_type] = 0; |
| 629 | } |
| 630 | } |
| 631 | else |
| 632 | { |
| 633 | /* |
| 634 | * The u1_is_first_frm_coded gets reset |
| 635 | * a) at start of sequence |
| 636 | * b) whenever there is a scene change. |
| 637 | * In both cases since we do not have any estimate about the |
| 638 | * current frame, we just send in the previous frame qp value.IN |
| 639 | * Scene change case the previous QP is incremented by 4 , This is |
| 640 | * done because the Scene changed VOP will have over consumed and |
| 641 | * chances of future frames skipping is very high. For the init |
| 642 | * case, the previous frame QP is initialized with the init qp |
| 643 | */ |
| 644 | if((ps_rate_control_api->u1_scd_detected) |
| 645 | && (ps_rate_control_api->e_rc_type != CONST_QP)) |
| 646 | { |
| 647 | /* |
| 648 | * If scene change is detected, I frame Qp would have been |
| 649 | * updated |
| 650 | */ |
| 651 | /* Use a QP calculated in the prev update fxn */ |
| 652 | u1_frame_qp = ps_rate_control_api->u1_frm_qp_after_scd; |
| 653 | } |
| 654 | else |
| 655 | { |
| 656 | u1_frame_qp = ps_rate_control_api->au1_prev_frm_qp[e_pic_type]; |
| 657 | } |
| 658 | } |
| 659 | } |
| 660 | else |
| 661 | { |
| 662 | u1_frame_qp = ps_rate_control_api->au1_init_qp[e_pic_type]; |
| 663 | } |
| 664 | |
| 665 | trace_printf((const WORD8*)"fqp %d\n", u1_frame_qp); |
| 666 | |
| 667 | return (u1_frame_qp); |
| 668 | } |
| 669 | |
| 670 | /******************************************************************************* |
| 671 | *Function Name : irc_get_buffer_status |
| 672 | *Description : Gets the state of VBV buffer |
| 673 | *Outputs : 0 = normal, 1 = underflow, 2= overflow |
| 674 | *Returns : vbv_buf_status_e |
| 675 | ******************************************************************************/ |
| 676 | vbv_buf_status_e irc_get_buffer_status(rate_control_api_t *ps_rate_control_api, |
| 677 | WORD32 i4_total_frame_bits, |
| 678 | picture_type_e e_pic_type, |
| 679 | WORD32 *pi4_num_bits_to_prevent_vbv_underflow) |
| 680 | { |
| 681 | vbv_buf_status_e e_buf_status = VBV_NORMAL; |
| 682 | |
| 683 | /* Get the buffer status for the current total consumed bits and error bits*/ |
| 684 | if(ps_rate_control_api->e_rc_type == VBR_STORAGE_DVD_COMP) |
| 685 | { |
| 686 | e_buf_status = irc_get_vbv_buffer_status( |
| 687 | ps_rate_control_api->ps_vbr_storage_vbv, |
| 688 | i4_total_frame_bits, |
| 689 | pi4_num_bits_to_prevent_vbv_underflow); |
| 690 | |
| 691 | trace_printf((const WORD8*)"e_buf_status = %d\n", e_buf_status); |
| 692 | } |
| 693 | else if(ps_rate_control_api->e_rc_type == VBR_STORAGE) |
| 694 | { |
| 695 | /* For VBR case since there is not underflow returning the max value */ |
| 696 | pi4_num_bits_to_prevent_vbv_underflow[0] = irc_get_max_vbv_buf_size( |
| 697 | ps_rate_control_api->ps_vbr_storage_vbv); |
| 698 | e_buf_status = VBV_NORMAL; |
| 699 | } |
| 700 | else if(ps_rate_control_api->e_rc_type == CBR_NLDRC) |
| 701 | { |
| 702 | e_buf_status = irc_get_cbr_buffer_status( |
| 703 | ps_rate_control_api->ps_cbr_buffer, i4_total_frame_bits, |
| 704 | pi4_num_bits_to_prevent_vbv_underflow, e_pic_type); |
| 705 | |
| 706 | } |
| 707 | else if(ps_rate_control_api->e_rc_type == VBR_STREAMING) |
| 708 | { |
| 709 | /* For VBR_streaming, error bits are computed according to peak bitrate*/ |
| 710 | e_buf_status = irc_get_cbr_buffer_status( |
| 711 | ps_rate_control_api->ps_cbr_buffer, i4_total_frame_bits, |
| 712 | pi4_num_bits_to_prevent_vbv_underflow, e_pic_type); |
| 713 | } |
| 714 | return e_buf_status; |
| 715 | } |
| 716 | |
| 717 | /******************************************************************************* |
| 718 | Function Name : irc_update_pic_handling_state |
| 719 | Description : If the forward path and the backward path of rate control |
| 720 | ******************************************************************************/ |
| 721 | void irc_update_pic_handling_state(rate_control_api_t *ps_rate_control_api, |
| 722 | picture_type_e e_pic_type) |
| 723 | { |
| 724 | irc_update_pic_handling(ps_rate_control_api->ps_pic_handling, e_pic_type); |
| 725 | } |
| 726 | |
| 727 | /****************************************************************************** |
| 728 | Function Name : irc_update_frame_level_info |
| 729 | Description : Updates the frame level information into the rate control |
| 730 | structure |
| 731 | ******************************************************************************/ |
| 732 | void irc_update_frame_level_info(rate_control_api_t *ps_rate_control_api, |
| 733 | picture_type_e e_pic_type, |
| 734 | WORD32 *pi4_mb_type_sad, |
| 735 | WORD32 i4_total_frame_bits, |
| 736 | WORD32 i4_model_updation_hdr_bits, |
| 737 | WORD32 *pi4_mb_type_tex_bits, |
| 738 | WORD32 *pi4_tot_mb_type_qp, |
| 739 | WORD32 *pi4_tot_mb_in_type, |
| 740 | WORD32 i4_avg_activity, |
| 741 | UWORD8 u1_is_scd, |
| 742 | WORD32 i4_is_it_a_skip, |
| 743 | WORD32 i4_intra_frm_cost, |
| 744 | WORD32 i4_is_pic_handling_done) |
| 745 | { |
| 746 | UWORD8 u1_num_skips = 0; |
| 747 | WORD32 i; |
| 748 | UWORD32 u4_frame_sad = 0; |
| 749 | WORD32 i4_tot_texture_bits = 0; |
| 750 | WORD32 i4_tot_mbs = 0; |
| 751 | WORD32 i4_avg_qp = 0; |
| 752 | |
| 753 | /* SCD not supported in case of IPB encoder */ |
| 754 | if(u1_is_scd && (irc_pic_type_get_inter_frame_interval( |
| 755 | ps_rate_control_api->ps_pic_handling) > 1)) |
| 756 | { |
| 757 | u1_is_scd = 0; |
| 758 | } |
Harish Mahendrakar | 14187ea | 2017-04-29 16:00:02 +0530 | [diff] [blame] | 759 | /* For frames that contain plane areas that differ from reference frames, encoder |
| 760 | * might generate more INTRA MBs because of lower SAD compared with INTER MBs. |
| 761 | * Such cases should not be treated as scene change. |
| 762 | * For such frames bits consumed will be lesser than the allocated bits. |
| 763 | */ |
| 764 | if(i4_total_frame_bits < ps_rate_control_api->i4_prev_frm_est_bits) |
| 765 | { |
| 766 | u1_is_scd = 0; |
| 767 | } |
| 768 | |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 769 | trace_printf((const WORD8*)"i4_total_frame_bits %d\n", i4_total_frame_bits); |
| 770 | |
| 771 | if(!i4_is_it_a_skip && !i4_is_pic_handling_done) |
| 772 | { |
| 773 | /* Update the pic_handling struct */ |
| 774 | irc_update_pic_handling(ps_rate_control_api->ps_pic_handling, |
| 775 | e_pic_type); |
| 776 | } |
| 777 | |
| 778 | if(ps_rate_control_api->e_rc_type != CONST_QP) |
| 779 | { |
| 780 | if(!i4_is_it_a_skip) |
| 781 | { |
| 782 | WORD32 i4_new_period_flag; |
| 783 | /****************************************************************** |
| 784 | Calculate the total values from the individual values |
| 785 | ******************************************************************/ |
| 786 | for(i = 0; i < MAX_MB_TYPE; i++) |
| 787 | u4_frame_sad += pi4_mb_type_sad[i]; |
| 788 | for(i = 0; i < MAX_MB_TYPE; i++) |
| 789 | i4_tot_texture_bits += pi4_mb_type_tex_bits[i]; |
| 790 | for(i = 0; i < MAX_MB_TYPE; i++) |
| 791 | i4_avg_qp += pi4_tot_mb_type_qp[i]; |
| 792 | for(i = 0; i < MAX_MB_TYPE; i++) |
| 793 | i4_tot_mbs += pi4_tot_mb_in_type[i]; |
| 794 | i4_avg_qp /= i4_tot_mbs; /* Calculate the average QP */ |
| 795 | |
| 796 | if(ps_rate_control_api->u1_is_mb_level_rc_on) |
| 797 | { |
| 798 | /* |
| 799 | * The model needs to take into consideration the average |
| 800 | * activity of the entire frame while estimating the QP. Thus |
| 801 | * the frame sad values are scaled by the average activity |
| 802 | * before updating it into the model. |
| 803 | */ |
| 804 | if(!i4_avg_activity) |
| 805 | i4_avg_activity = 1; |
| 806 | i4_intra_frm_cost *= i4_avg_activity; |
| 807 | u4_frame_sad *= i4_avg_activity; |
| 808 | } |
| 809 | |
| 810 | /****************************************************************** |
| 811 | Update the bit allocation module |
| 812 | NOTE: For bit allocation module, the pic_type should not be |
| 813 | modified to that of 'I', in case of a SCD. |
| 814 | ******************************************************************/ |
| 815 | i4_new_period_flag = irc_is_last_frame_in_gop( |
| 816 | ps_rate_control_api->ps_pic_handling); |
| 817 | irc_ba_update_cur_frm_consumed_bits( |
| 818 | ps_rate_control_api->ps_bit_allocation, |
| 819 | ps_rate_control_api->ps_pic_handling, |
| 820 | i4_total_frame_bits, i4_model_updation_hdr_bits, |
| 821 | e_pic_type, u1_is_scd, i4_new_period_flag); |
| 822 | |
| 823 | if(1 == i4_new_period_flag |
| 824 | && ((ps_rate_control_api->e_rc_type == VBR_STORAGE) |
| 825 | || (ps_rate_control_api->e_rc_type |
| 826 | == VBR_STORAGE_DVD_COMP))) |
| 827 | { |
| 828 | irc_ba_check_and_update_bit_allocation( |
| 829 | ps_rate_control_api->ps_bit_allocation, |
| 830 | ps_rate_control_api->ps_pic_handling, |
| 831 | irc_get_cur_vbv_buf_size( |
| 832 | ps_rate_control_api->ps_vbr_storage_vbv), |
| 833 | irc_get_max_vbv_buf_size( |
| 834 | ps_rate_control_api->ps_vbr_storage_vbv), |
| 835 | irc_get_max_bits_per_tgt_frm( |
| 836 | ps_rate_control_api->ps_vbr_storage_vbv), |
| 837 | i4_total_frame_bits); |
| 838 | } |
| 839 | } |
| 840 | |
| 841 | /********************************************************************** |
| 842 | Update the buffer status |
| 843 | *********************************************************************/ |
| 844 | /* |
| 845 | * This update is done after overflow and underflow handling to |
| 846 | * account for the actual bits dumped |
| 847 | */ |
| 848 | if((ps_rate_control_api->e_rc_type == VBR_STORAGE) |
| 849 | || (ps_rate_control_api->e_rc_type |
| 850 | == VBR_STORAGE_DVD_COMP)) |
| 851 | { |
| 852 | irc_update_vbr_vbv(ps_rate_control_api->ps_vbr_storage_vbv, |
| 853 | i4_total_frame_bits); |
| 854 | } |
| 855 | else if(ps_rate_control_api->e_rc_type == CBR_NLDRC) |
| 856 | { |
| 857 | irc_update_cbr_buffer(ps_rate_control_api->ps_cbr_buffer, |
| 858 | i4_total_frame_bits, e_pic_type); |
| 859 | } |
| 860 | else if(ps_rate_control_api->e_rc_type == VBR_STREAMING) |
| 861 | { |
| 862 | UWORD32 au4_num_pics_in_delay_prd[MAX_PIC_TYPE]; |
| 863 | |
| 864 | irc_get_vsp_num_pics_in_dly_prd( |
| 865 | &ps_rate_control_api->s_vbr_str_prms, |
| 866 | au4_num_pics_in_delay_prd); |
| 867 | |
| 868 | irc_update_cbr_buffer(ps_rate_control_api->ps_cbr_buffer, |
| 869 | i4_total_frame_bits, e_pic_type); |
| 870 | |
| 871 | irc_update_vbr_str_prms(&ps_rate_control_api->s_vbr_str_prms, |
| 872 | e_pic_type); |
| 873 | |
| 874 | irc_change_cbr_vbv_num_pics_in_delay_period( |
| 875 | ps_rate_control_api->ps_cbr_buffer, |
| 876 | au4_num_pics_in_delay_prd); |
| 877 | |
| 878 | /* |
| 879 | * If the change_in_peak_bitrate flag is set, after the delay period |
| 880 | * update the peak_bitrate and the buffer parameters |
| 881 | */ |
| 882 | if(!ps_rate_control_api->u4_frms_in_delay_prd_for_peak_bit_rate_change) |
| 883 | { |
| 884 | irc_ba_change_ba_peak_bit_rate( |
| 885 | ps_rate_control_api->ps_bit_allocation, |
| 886 | (WORD32 *)&ps_rate_control_api->au4_new_peak_bit_rate[0]); |
| 887 | irc_change_cbr_vbv_bit_rate( |
| 888 | ps_rate_control_api->ps_cbr_buffer, |
| 889 | (WORD32 *)&ps_rate_control_api->au4_new_peak_bit_rate[0]); |
| 890 | } |
| 891 | if(ps_rate_control_api->u4_frms_in_delay_prd_for_peak_bit_rate_change) |
| 892 | ps_rate_control_api->u4_frms_in_delay_prd_for_peak_bit_rate_change--; |
| 893 | } |
| 894 | |
| 895 | if(!i4_is_it_a_skip) |
| 896 | { |
| 897 | /******************************************************************* |
| 898 | Handle the SCENE CHANGE DETECTED |
| 899 | 1) Make the picture type as I, so that updation happens as if it is |
| 900 | an I frame |
| 901 | 2) Reset model, SAD and flag to restart the estimation process |
| 902 | ******************************************************************/ |
| 903 | if(u1_is_scd) |
| 904 | { |
| 905 | WORD32 i4_frm_qp_after_scd; |
| 906 | UWORD32 u4_prev_I_frm_sad; |
| 907 | |
| 908 | e_pic_type = I_PIC; |
| 909 | |
| 910 | /* Scale scd qp based on SCD Frm sad and previous I Frm sad */ |
| 911 | /* frm_qp_after_scd = (avg_qp * cur_frm_sad)/prev_I_frm_sad */ |
| 912 | |
| 913 | /* |
| 914 | * QP for the next frame should take care of |
| 915 | * 1) due to scene change, the current picture has consumed more |
| 916 | * bits |
| 917 | * 2) relative complexity of the previous scene and the current |
| 918 | * scene |
| 919 | */ |
| 920 | |
| 921 | /* Get the intra SAD for the previous scene */ |
| 922 | u4_prev_I_frm_sad = irc_get_est_sad( |
| 923 | ps_rate_control_api->ps_est_sad, I_PIC); |
| 924 | |
| 925 | /* |
| 926 | * Scale the QP based on the SAD ratio of the current pic and |
| 927 | * previous scene intra SAD |
| 928 | */ |
| 929 | X_PROD_Y_DIV_Z(i4_avg_qp, u4_frame_sad, u4_prev_I_frm_sad, |
| 930 | i4_frm_qp_after_scd); |
| 931 | |
| 932 | /* Limit the next frame qp by 50% across both the sides */ |
| 933 | if(i4_frm_qp_after_scd > ((i4_avg_qp * 3) >> 1)) |
| 934 | { |
| 935 | i4_frm_qp_after_scd = (i4_avg_qp * 3) >> 1; |
| 936 | } |
| 937 | else if(i4_frm_qp_after_scd < (i4_avg_qp >> 1)) |
| 938 | { |
| 939 | i4_frm_qp_after_scd = (i4_avg_qp >> 1); |
| 940 | } |
| 941 | |
| 942 | /* |
| 943 | * Ensure that the next frame QP is within the min_max limit of |
| 944 | * QP allowed |
| 945 | */ |
| 946 | if(i4_frm_qp_after_scd |
| 947 | > ps_rate_control_api->au1_min_max_qp[(e_pic_type |
| 948 | << 1) + 1]) |
| 949 | { |
| 950 | i4_frm_qp_after_scd = |
| 951 | ps_rate_control_api->au1_min_max_qp[(e_pic_type |
| 952 | << 1) + 1]; |
| 953 | } |
| 954 | else if(i4_frm_qp_after_scd |
| 955 | < ps_rate_control_api->au1_min_max_qp[(e_pic_type |
| 956 | << 1)]) |
| 957 | { |
| 958 | i4_frm_qp_after_scd = |
| 959 | ps_rate_control_api->au1_min_max_qp[(e_pic_type |
| 960 | << 1)]; |
| 961 | } |
| 962 | |
| 963 | /* Update the state var */ |
| 964 | ps_rate_control_api->u1_frm_qp_after_scd = |
| 965 | (UWORD8)i4_frm_qp_after_scd; |
| 966 | |
| 967 | /* re-set model */ |
| 968 | for(i = 0; i < MAX_PIC_TYPE; i++) |
| 969 | { |
| 970 | irc_reset_frm_rc_rd_model( |
| 971 | ps_rate_control_api->aps_rd_model[i]); |
| 972 | } |
| 973 | |
| 974 | /* Reset the SAD estimation module */ |
| 975 | irc_reset_est_sad(ps_rate_control_api->ps_est_sad); |
| 976 | |
| 977 | /* Reset flag */ |
| 978 | for(i = 0; i < MAX_PIC_TYPE; i++) |
| 979 | { |
| 980 | ps_rate_control_api->au1_is_first_frm_coded[i] = 0; |
| 981 | } |
| 982 | |
| 983 | /* Reset the MB Rate control */ |
| 984 | irc_init_mb_level_rc(ps_rate_control_api->ps_mb_rate_control); |
| 985 | |
| 986 | /*Set u1_scd_detected flag*/ |
| 987 | ps_rate_control_api->u1_scd_detected = 1; |
| 988 | |
| 989 | /* |
| 990 | * Adjust the average QP for the frame based on bits |
| 991 | * consumption |
| 992 | */ |
| 993 | /* |
| 994 | * Initialize the QP for each picture type according to the |
| 995 | * average QP of the SCD pic |
| 996 | */ |
| 997 | ps_rate_control_api->au1_prev_frm_qp[I_PIC] = (UWORD8)i4_avg_qp; |
| 998 | |
| 999 | trace_printf((const WORD8*)"SCD DETECTED\n"); |
| 1000 | } |
| 1001 | else |
| 1002 | { |
| 1003 | ps_rate_control_api->u1_scd_detected = 0; |
| 1004 | /************************************************************** |
| 1005 | Update the Qp used by the current frame |
| 1006 | **************************************************************/ |
| 1007 | ps_rate_control_api->au1_prev_frm_qp[e_pic_type] = |
| 1008 | (UWORD8)i4_avg_qp; |
| 1009 | } |
| 1010 | |
| 1011 | /******************************************************************** |
| 1012 | Update the model of the correponding picture type |
| 1013 | NOTE: For SCD, we force the frame type from 'P' to that of a 'I' |
| 1014 | ******************************************************************/ |
| 1015 | /* |
| 1016 | * For very simple sequences no bits are consumed by texture. These |
| 1017 | * frames do not add any information to the model and so not added |
| 1018 | */ |
| 1019 | if(i4_tot_texture_bits && u4_frame_sad) |
| 1020 | { |
| 1021 | irc_add_frame_to_rd_model( |
| 1022 | ps_rate_control_api->aps_rd_model[e_pic_type], |
| 1023 | i4_tot_texture_bits, (UWORD8)i4_avg_qp, |
| 1024 | u4_frame_sad, u1_num_skips); |
| 1025 | |
| 1026 | /* |
| 1027 | * At least one proper frame in added into the model. Until that |
| 1028 | * keep using the initial QP |
| 1029 | */ |
| 1030 | ps_rate_control_api->au1_is_first_frm_coded[e_pic_type] = 1; |
| 1031 | } |
| 1032 | |
| 1033 | if(i4_avg_activity) |
| 1034 | { |
| 1035 | /* Update the mb_level model */ |
| 1036 | irc_mb_update_frame_level( |
| 1037 | ps_rate_control_api->ps_mb_rate_control, |
| 1038 | i4_avg_activity); |
| 1039 | } |
| 1040 | |
| 1041 | /****************************************************************** |
| 1042 | Update the sad estimation module |
| 1043 | NOTE: For SCD, we force the frame type from 'P' to that of a 'I' |
| 1044 | ******************************************************************/ |
| 1045 | if(u4_frame_sad) |
| 1046 | { |
| 1047 | irc_update_actual_sad(ps_rate_control_api->ps_est_sad, |
| 1048 | u4_frame_sad, e_pic_type); |
| 1049 | |
| 1050 | irc_update_actual_sad_for_intra(ps_rate_control_api->ps_est_sad, |
| 1051 | i4_intra_frm_cost); |
| 1052 | } |
| 1053 | |
| 1054 | /* |
| 1055 | * Update the variable which denotes that a frame has been |
| 1056 | * encountered |
| 1057 | */ |
| 1058 | ps_rate_control_api->u1_is_first_frm = 0; |
| 1059 | |
| 1060 | } |
| 1061 | } |
| 1062 | |
| 1063 | /* Store the prev encoded picture type for restricting Qp swing */ |
| 1064 | if((e_pic_type == I_PIC) || (e_pic_type == P_PIC)) |
| 1065 | { |
| 1066 | ps_rate_control_api->prev_ref_pic_type = e_pic_type; |
| 1067 | } |
| 1068 | |
| 1069 | trace_printf((const WORD8*)"ft %d,hb %d,tb %d,qp %d,fs %d\n", e_pic_type, |
| 1070 | i4_model_updation_hdr_bits, i4_tot_texture_bits, i4_avg_qp, |
| 1071 | u4_frame_sad); |
| 1072 | |
| 1073 | return; |
| 1074 | } |
| 1075 | |
| 1076 | /******************************************************************************* |
| 1077 | MB Level API functions |
| 1078 | ******************************************************************************/ |
| 1079 | |
| 1080 | /****************************************************************************** |
| 1081 | Function Name : irc_init_mb_rc_frame_level |
| 1082 | Description : Initialise the frame level details required for a mb level |
| 1083 | ******************************************************************************/ |
| 1084 | |
| 1085 | void irc_init_mb_rc_frame_level(rate_control_api_t *ps_rate_control_api, |
| 1086 | UWORD8 u1_frame_qp) |
| 1087 | { |
| 1088 | irc_mb_init_frame_level(ps_rate_control_api->ps_mb_rate_control, |
| 1089 | u1_frame_qp); |
| 1090 | } |
| 1091 | |
| 1092 | /****************************************************************************** |
| 1093 | Function Name : irc_get_mb_level_qp |
| 1094 | Description : Get the mb level qp |
| 1095 | *****************************************************************************/ |
| 1096 | void irc_get_mb_level_qp(rate_control_api_t *ps_rate_control_api, |
| 1097 | WORD32 i4_cur_mb_activity, |
| 1098 | WORD32 *pi4_mb_qp, |
| 1099 | picture_type_e e_pic_type) |
| 1100 | { |
| 1101 | if(ps_rate_control_api->u1_is_mb_level_rc_on) |
| 1102 | { |
| 1103 | irc_get_mb_qp(ps_rate_control_api->ps_mb_rate_control, |
| 1104 | i4_cur_mb_activity, pi4_mb_qp); |
| 1105 | |
| 1106 | /* Truncating the QP to the Max and Min Qp values possible */ |
| 1107 | if(pi4_mb_qp[1] < ps_rate_control_api->au1_min_max_qp[e_pic_type << 1]) |
| 1108 | { |
| 1109 | pi4_mb_qp[1] = ps_rate_control_api->au1_min_max_qp[e_pic_type << 1]; |
| 1110 | } |
| 1111 | if(pi4_mb_qp[1] |
| 1112 | > ps_rate_control_api->au1_min_max_qp[(e_pic_type << 1) |
| 1113 | + 1]) |
| 1114 | { |
| 1115 | pi4_mb_qp[1] = ps_rate_control_api->au1_min_max_qp[(e_pic_type << 1) |
| 1116 | + 1]; |
| 1117 | } |
| 1118 | } |
| 1119 | else |
| 1120 | { |
| 1121 | WORD32 i4_qp; |
| 1122 | i4_qp = irc_get_frm_level_qp(ps_rate_control_api->ps_mb_rate_control); |
| 1123 | /* Both the qp are used for */ |
| 1124 | pi4_mb_qp[0] = i4_qp; /* Used as feedback for the rate control */ |
| 1125 | pi4_mb_qp[1] = i4_qp; /* Used for quantising the MB*/ |
| 1126 | } |
| 1127 | } |
| 1128 | |
| 1129 | /**************************************************************************** |
| 1130 | Function Name : irc_get_bits_to_stuff |
| 1131 | Description : Gets the bits to stuff to prevent Underflow of Encoder Buffer |
| 1132 | *****************************************************************************/ |
| 1133 | WORD32 irc_get_bits_to_stuff(rate_control_api_t *ps_rate_control_api, |
| 1134 | WORD32 i4_tot_consumed_bits, |
| 1135 | picture_type_e e_pic_type) |
| 1136 | { |
| 1137 | WORD32 i4_bits_to_stuff; |
| 1138 | /* Get the CBR bits to stuff*/ |
| 1139 | i4_bits_to_stuff = irc_get_cbr_bits_to_stuff( |
| 1140 | ps_rate_control_api->ps_cbr_buffer, i4_tot_consumed_bits, |
| 1141 | e_pic_type); |
| 1142 | return i4_bits_to_stuff; |
| 1143 | } |
| 1144 | |
| 1145 | /**************************************************************************** |
| 1146 | Function Name : irc_get_prev_frm_est_bits |
| 1147 | Description : Returns previous frame estimated bits |
| 1148 | *****************************************************************************/ |
| 1149 | WORD32 irc_get_prev_frm_est_bits(rate_control_api_t *ps_rate_control_api) |
| 1150 | { |
| 1151 | return (ps_rate_control_api->i4_prev_frm_est_bits); |
| 1152 | } |
| 1153 | |
| 1154 | /****************************************************************************** |
| 1155 | Control Level API functions |
| 1156 | Logic: The control call sets the state structure of the rate control api |
| 1157 | accordingly such that the next process call would implement the same. |
| 1158 | ******************************************************************************/ |
| 1159 | |
| 1160 | void irc_change_inter_frm_int_call(rate_control_api_t *ps_rate_control_api, |
| 1161 | WORD32 i4_inter_frm_int) |
| 1162 | { |
| 1163 | irc_pic_handling_register_new_inter_frm_interval( |
| 1164 | ps_rate_control_api->ps_pic_handling, i4_inter_frm_int); |
| 1165 | } |
| 1166 | |
| 1167 | void irc_change_intra_frm_int_call(rate_control_api_t *ps_rate_control_api, |
| 1168 | WORD32 i4_intra_frm_int) |
| 1169 | { |
| 1170 | irc_pic_handling_register_new_int_frm_interval( |
| 1171 | ps_rate_control_api->ps_pic_handling, i4_intra_frm_int); |
| 1172 | |
| 1173 | if(ps_rate_control_api->e_rc_type == VBR_STREAMING) |
| 1174 | { |
| 1175 | irc_change_vsp_ifi(&ps_rate_control_api->s_vbr_str_prms, |
| 1176 | i4_intra_frm_int); |
| 1177 | } |
| 1178 | } |
| 1179 | |
| 1180 | /**************************************************************************** |
| 1181 | Function Name : irc_change_avg_bit_rate |
| 1182 | Description : Whenever the average bit rate changes, the excess bits is |
| 1183 | between the changed bit rate and the old one is re-distributed |
| 1184 | in the bit allocation module |
| 1185 | *****************************************************************************/ |
| 1186 | void irc_change_avg_bit_rate(rate_control_api_t *ps_rate_control_api, |
| 1187 | UWORD32 u4_average_bit_rate) |
| 1188 | { |
| 1189 | int i; |
| 1190 | if(ps_rate_control_api->e_rc_type != CONST_QP) |
| 1191 | { |
| 1192 | /* |
| 1193 | * Bit Allocation Module: distribute the excess/deficit bits between the |
| 1194 | * old and the new frame rate to all the remaining frames |
| 1195 | */ |
| 1196 | irc_ba_change_remaining_bits_in_period( |
| 1197 | ps_rate_control_api->ps_bit_allocation, |
| 1198 | ps_rate_control_api->ps_pic_handling, |
| 1199 | u4_average_bit_rate, |
| 1200 | irc_ba_get_frame_rate( |
| 1201 | ps_rate_control_api->ps_bit_allocation), |
| 1202 | (WORD32 *)(ps_rate_control_api->au4_new_peak_bit_rate)); |
| 1203 | } |
| 1204 | if(ps_rate_control_api->e_rc_type == CBR_NLDRC) |
| 1205 | { |
| 1206 | UWORD32 u4_average_bit_rate_copy[MAX_NUM_DRAIN_RATES]; |
| 1207 | for(i = 0; i < MAX_NUM_DRAIN_RATES; i++) |
| 1208 | { |
| 1209 | u4_average_bit_rate_copy[i] = u4_average_bit_rate; |
| 1210 | } |
| 1211 | irc_change_cbr_vbv_bit_rate(ps_rate_control_api->ps_cbr_buffer, |
| 1212 | (WORD32 *)(u4_average_bit_rate_copy)); |
| 1213 | } |
| 1214 | |
| 1215 | /* |
| 1216 | * This is done only for average bitrate changing somewhere after the model |
| 1217 | * stabilizes.Here it is assumed that user will not do this call after |
| 1218 | * first few frames. If we dont have this check, what would happen is since |
| 1219 | * the model has not stabilized, also bitrate has changed before the first |
| 1220 | * frame, we dont restrict the qp. Qp can go to very bad values after init |
| 1221 | * qp since if swing is disabled. |
| 1222 | * This check will become buggy if change bitrate is called say somewhere |
| 1223 | * after first two frames.Bottom line - RC init is done during create and |
| 1224 | * this call is done just before first process.And we want to differentiate |
| 1225 | * between this call done before first process and the call which is done |
| 1226 | * during run time |
| 1227 | */ |
| 1228 | if(ps_rate_control_api->u1_is_first_frm == 0) |
| 1229 | { |
| 1230 | for(i = 0; i < MAX_PIC_TYPE; i++) |
| 1231 | { |
| 1232 | ps_rate_control_api->au1_avg_bitrate_changed[i] = 1; |
| 1233 | } |
| 1234 | } |
| 1235 | } |
| 1236 | |
| 1237 | /**************************************************************************** |
| 1238 | Function Name : irc_change_frame_rate |
| 1239 | Description : Does the necessary changes whenever there is a change in |
| 1240 | frame rate |
| 1241 | *****************************************************************************/ |
| 1242 | void irc_change_frame_rate(rate_control_api_t *ps_rate_control_api, |
| 1243 | UWORD32 u4_frame_rate, |
| 1244 | UWORD32 u4_src_ticks, |
| 1245 | UWORD32 u4_tgt_ticks) |
| 1246 | { |
| 1247 | |
| 1248 | if(ps_rate_control_api->e_rc_type != CONST_QP) |
| 1249 | { |
| 1250 | UWORD32 u4_frms_in_delay_prd = ((u4_frame_rate |
| 1251 | * irc_get_cbr_buffer_delay( |
| 1252 | ps_rate_control_api->ps_cbr_buffer)) |
| 1253 | / 1000000); |
| 1254 | if((ps_rate_control_api->e_rc_type == VBR_STORAGE) |
| 1255 | || (ps_rate_control_api->e_rc_type |
| 1256 | == VBR_STORAGE_DVD_COMP)) |
| 1257 | { |
| 1258 | irc_change_vbr_vbv_frame_rate( |
| 1259 | ps_rate_control_api->ps_vbr_storage_vbv, |
| 1260 | u4_frame_rate); |
| 1261 | } |
| 1262 | else if(ps_rate_control_api->e_rc_type == CBR_NLDRC) |
| 1263 | { |
| 1264 | irc_change_cbr_vbv_tgt_frame_rate( |
| 1265 | ps_rate_control_api->ps_cbr_buffer, u4_frame_rate); |
| 1266 | } |
| 1267 | else if(ps_rate_control_api->e_rc_type == VBR_STREAMING) |
| 1268 | { |
| 1269 | UWORD32 au4_num_pics_in_delay_prd[MAX_PIC_TYPE]; |
| 1270 | irc_change_vsp_tgt_ticks(&ps_rate_control_api->s_vbr_str_prms, |
| 1271 | u4_tgt_ticks); |
| 1272 | irc_change_vsp_src_ticks(&ps_rate_control_api->s_vbr_str_prms, |
| 1273 | u4_src_ticks); |
| 1274 | irc_change_vsp_fidp(&ps_rate_control_api->s_vbr_str_prms, |
| 1275 | u4_frms_in_delay_prd); |
| 1276 | |
| 1277 | irc_get_vsp_num_pics_in_dly_prd( |
| 1278 | &ps_rate_control_api->s_vbr_str_prms, |
| 1279 | au4_num_pics_in_delay_prd); |
| 1280 | irc_change_cbr_vbv_tgt_frame_rate( |
| 1281 | ps_rate_control_api->ps_cbr_buffer, u4_frame_rate); |
| 1282 | irc_change_cbr_vbv_num_pics_in_delay_period( |
| 1283 | ps_rate_control_api->ps_cbr_buffer, |
| 1284 | au4_num_pics_in_delay_prd); |
| 1285 | } |
| 1286 | |
| 1287 | /* |
| 1288 | * Bit Allocation Module: distribute the excess/deficit bits between the |
| 1289 | * old and the new frame rate to all the remaining frames |
| 1290 | */ |
| 1291 | irc_ba_change_remaining_bits_in_period( |
| 1292 | ps_rate_control_api->ps_bit_allocation, |
| 1293 | ps_rate_control_api->ps_pic_handling, |
| 1294 | irc_ba_get_bit_rate( |
| 1295 | ps_rate_control_api->ps_bit_allocation), |
| 1296 | u4_frame_rate, |
| 1297 | (WORD32 *)(ps_rate_control_api->au4_new_peak_bit_rate)); |
| 1298 | } |
| 1299 | } |
| 1300 | |
| 1301 | /**************************************************************************** |
| 1302 | Function Name : irc_change_frm_rate_for_bit_alloc |
| 1303 | Description : Does the necessary changes only in the bit_allocation module |
| 1304 | there is a change in frame rate |
| 1305 | *****************************************************************************/ |
| 1306 | void irc_change_frm_rate_for_bit_alloc(rate_control_api_t *ps_rate_control_api, |
| 1307 | UWORD32 u4_frame_rate) |
| 1308 | { |
| 1309 | |
| 1310 | if(ps_rate_control_api->e_rc_type != CONST_QP) |
| 1311 | { |
| 1312 | /* |
| 1313 | * Bit Allocation Module: distribute the excess/deficit bits between the |
| 1314 | * old and the new frame rate to all the remaining frames |
| 1315 | */ |
| 1316 | irc_ba_change_remaining_bits_in_period( |
| 1317 | ps_rate_control_api->ps_bit_allocation, |
| 1318 | ps_rate_control_api->ps_pic_handling, |
| 1319 | irc_ba_get_bit_rate( |
| 1320 | ps_rate_control_api->ps_bit_allocation), |
| 1321 | u4_frame_rate, |
| 1322 | (WORD32 *)(ps_rate_control_api->au4_new_peak_bit_rate)); |
| 1323 | |
| 1324 | if(ps_rate_control_api->e_rc_type == VBR_STORAGE |
| 1325 | || ps_rate_control_api->e_rc_type |
| 1326 | == VBR_STORAGE_DVD_COMP) |
| 1327 | { |
| 1328 | irc_change_vbr_max_bits_per_tgt_frm( |
| 1329 | ps_rate_control_api->ps_vbr_storage_vbv, |
| 1330 | u4_frame_rate); |
| 1331 | } |
| 1332 | } |
| 1333 | } |
| 1334 | |
| 1335 | void irc_change_init_qp(rate_control_api_t *ps_rate_control_api, |
| 1336 | UWORD8 *pu1_init_qp) |
| 1337 | { |
| 1338 | WORD32 i; |
| 1339 | /* Initialize the init_qp */ |
| 1340 | for(i = 0; i < MAX_PIC_TYPE; i++) |
| 1341 | { |
| 1342 | ps_rate_control_api->au1_init_qp[i] = pu1_init_qp[i]; |
| 1343 | ps_rate_control_api->au1_prev_frm_qp[i] = pu1_init_qp[i]; |
| 1344 | } |
| 1345 | } |
| 1346 | |
| 1347 | void irc_change_min_max_qp(rate_control_api_t *ps_rate_control_api, |
| 1348 | UWORD8 *pu1_min_max_qp) |
| 1349 | { |
| 1350 | WORD32 i; |
| 1351 | for(i = 0; i < MAX_PIC_TYPE; i++) |
| 1352 | { |
| 1353 | ps_rate_control_api->au1_min_max_qp[(i << 1)] = |
| 1354 | pu1_min_max_qp[(i << 1)]; |
| 1355 | ps_rate_control_api->au1_min_max_qp[(i << 1) + 1] = pu1_min_max_qp[(i |
| 1356 | << 1) + 1]; |
| 1357 | } |
| 1358 | } |
| 1359 | |
| 1360 | /**************************************************************************** |
| 1361 | Function Name : irc_change_peak_bit_rate |
| 1362 | Description : Does the necessary changes whenever there is a change in |
| 1363 | peak bit rate |
| 1364 | *****************************************************************************/ |
| 1365 | WORD32 irc_change_peak_bit_rate(rate_control_api_t *ps_rate_control_api, |
| 1366 | UWORD32 *pu4_peak_bit_rate) |
| 1367 | { |
| 1368 | WORD32 i4_ret_val = RC_OK; |
| 1369 | int i; |
| 1370 | |
| 1371 | /* |
| 1372 | * Buffer Mechanism Module: Re-initialize the number of bits consumed per |
| 1373 | * frame |
| 1374 | */ |
| 1375 | if(ps_rate_control_api->e_rc_type == VBR_STORAGE |
| 1376 | || ps_rate_control_api->e_rc_type == VBR_STORAGE_DVD_COMP) |
| 1377 | { |
| 1378 | /* Send the new peak bit rate and the old frame rate */ |
| 1379 | irc_change_vbr_vbv_bit_rate(ps_rate_control_api->ps_vbr_storage_vbv, |
| 1380 | pu4_peak_bit_rate[0]); |
| 1381 | irc_ba_change_ba_peak_bit_rate(ps_rate_control_api->ps_bit_allocation, |
| 1382 | (WORD32 *)pu4_peak_bit_rate); |
| 1383 | |
| 1384 | for(i = 0; i < MAX_NUM_DRAIN_RATES; i++) |
| 1385 | { |
| 1386 | ps_rate_control_api->au4_new_peak_bit_rate[i] = |
| 1387 | pu4_peak_bit_rate[i]; |
| 1388 | } |
| 1389 | } |
| 1390 | else if(ps_rate_control_api->e_rc_type == VBR_STREAMING) |
| 1391 | { |
| 1392 | if(ps_rate_control_api->u4_frms_in_delay_prd_for_peak_bit_rate_change) |
| 1393 | { |
| 1394 | /* |
| 1395 | * Means that change in peak bit rate has been made twice before the |
| 1396 | * previous change could take effect |
| 1397 | */ |
| 1398 | i4_ret_val = RC_BENIGN_ERR; |
| 1399 | } |
| 1400 | /* |
| 1401 | * If the change happens before encoding the first frame make the |
| 1402 | * effect immediately else delay the effect |
| 1403 | */ |
| 1404 | if(ps_rate_control_api->u1_is_first_frm) |
| 1405 | { |
| 1406 | for(i = 0; i < MAX_NUM_DRAIN_RATES; i++) |
| 1407 | { |
| 1408 | ps_rate_control_api->au4_new_peak_bit_rate[i] = |
| 1409 | pu4_peak_bit_rate[i]; |
| 1410 | } |
| 1411 | irc_ba_change_ba_peak_bit_rate( |
| 1412 | ps_rate_control_api->ps_bit_allocation, |
| 1413 | (WORD32 *)pu4_peak_bit_rate); |
| 1414 | irc_change_cbr_vbv_bit_rate(ps_rate_control_api->ps_cbr_buffer, |
| 1415 | (WORD32 *)pu4_peak_bit_rate); |
| 1416 | } |
| 1417 | else |
| 1418 | { |
| 1419 | UWORD32 au4_num_pics_in_delay_prd[MAX_NUM_DRAIN_RATES]; |
| 1420 | /* |
| 1421 | * Else store the number of frames after which the effect should |
| 1422 | * happen and then update the peak bitrate |
| 1423 | */ |
| 1424 | ps_rate_control_api->u4_frms_in_delay_prd_for_peak_bit_rate_change = |
| 1425 | irc_get_vsp_num_pics_in_dly_prd( |
| 1426 | &ps_rate_control_api->s_vbr_str_prms, |
| 1427 | au4_num_pics_in_delay_prd); |
| 1428 | for(i = 0; i < MAX_NUM_DRAIN_RATES; i++) |
| 1429 | { |
| 1430 | ps_rate_control_api->au4_new_peak_bit_rate[i] = |
| 1431 | pu4_peak_bit_rate[i]; |
| 1432 | } |
| 1433 | } |
| 1434 | } |
| 1435 | |
| 1436 | return (i4_ret_val); |
| 1437 | } |
| 1438 | |
| 1439 | void irc_change_buffer_delay(rate_control_api_t *ps_rate_control_api, |
| 1440 | UWORD32 u4_buffer_delay) |
| 1441 | { |
| 1442 | UWORD32 u4_frms_in_delay_prd = ((irc_ba_get_frame_rate( |
| 1443 | ps_rate_control_api->ps_bit_allocation) * u4_buffer_delay) |
| 1444 | / 1000000); |
| 1445 | |
| 1446 | /* Initialize the rate control modules */ |
| 1447 | if(ps_rate_control_api->e_rc_type == CBR_NLDRC) |
| 1448 | { |
| 1449 | irc_change_cbr_buffer_delay(ps_rate_control_api->ps_cbr_buffer, |
| 1450 | u4_buffer_delay); |
| 1451 | } |
| 1452 | else if(ps_rate_control_api->e_rc_type == VBR_STORAGE |
| 1453 | || ps_rate_control_api->e_rc_type == VBR_STORAGE_DVD_COMP) |
| 1454 | { |
| 1455 | UWORD32 au4_num_pics_in_delay_prd[MAX_PIC_TYPE]; |
| 1456 | |
| 1457 | irc_change_vsp_fidp(&ps_rate_control_api->s_vbr_str_prms, |
| 1458 | u4_frms_in_delay_prd); |
| 1459 | |
| 1460 | /* Get the number of pics of each type in delay period */ |
| 1461 | irc_get_vsp_num_pics_in_dly_prd(&ps_rate_control_api->s_vbr_str_prms, |
| 1462 | au4_num_pics_in_delay_prd); |
| 1463 | |
| 1464 | irc_change_cbr_vbv_num_pics_in_delay_period( |
| 1465 | ps_rate_control_api->ps_cbr_buffer, |
| 1466 | au4_num_pics_in_delay_prd); |
| 1467 | } |
| 1468 | } |
| 1469 | |
| 1470 | /* Getter functions to get the current rate control parameters */ |
| 1471 | UWORD32 irc_get_frame_rate(rate_control_api_t *ps_rate_control_api) |
| 1472 | { |
| 1473 | return (irc_ba_get_frame_rate(ps_rate_control_api->ps_bit_allocation)); |
| 1474 | } |
| 1475 | |
| 1476 | UWORD32 irc_get_bit_rate(rate_control_api_t *ps_rate_control_api) |
| 1477 | { |
| 1478 | return (irc_ba_get_bit_rate(ps_rate_control_api->ps_bit_allocation)); |
| 1479 | } |
| 1480 | |
| 1481 | UWORD32 irc_get_peak_bit_rate(rate_control_api_t *ps_rate_control_api, |
| 1482 | WORD32 i4_index) |
| 1483 | { |
| 1484 | return (ps_rate_control_api->au4_new_peak_bit_rate[i4_index]); |
| 1485 | } |
| 1486 | |
| 1487 | UWORD32 irc_get_intra_frame_interval(rate_control_api_t *ps_rate_control_api) |
| 1488 | { |
| 1489 | return (irc_pic_type_get_intra_frame_interval( |
| 1490 | ps_rate_control_api->ps_pic_handling)); |
| 1491 | } |
| 1492 | |
| 1493 | UWORD32 irc_get_inter_frame_interval(rate_control_api_t *ps_rate_control_api) |
| 1494 | { |
| 1495 | return (irc_pic_type_get_inter_frame_interval( |
| 1496 | ps_rate_control_api->ps_pic_handling)); |
| 1497 | } |
| 1498 | |
| 1499 | rc_type_e irc_get_rc_type(rate_control_api_t *ps_rate_control_api) |
| 1500 | { |
| 1501 | return (ps_rate_control_api->e_rc_type); |
| 1502 | } |
| 1503 | |
| 1504 | WORD32 irc_get_bits_per_frame(rate_control_api_t *ps_rate_control_api) |
| 1505 | { |
| 1506 | WORD32 i4_bits_per_frm; |
| 1507 | |
| 1508 | X_PROD_Y_DIV_Z(irc_ba_get_bit_rate(ps_rate_control_api->ps_bit_allocation), |
| 1509 | (UWORD32)1000, |
| 1510 | irc_ba_get_frame_rate(ps_rate_control_api->ps_bit_allocation), |
| 1511 | i4_bits_per_frm); |
| 1512 | |
| 1513 | return (i4_bits_per_frm); |
| 1514 | } |
| 1515 | |
| 1516 | UWORD32 irc_get_max_delay(rate_control_api_t *ps_rate_control_api) |
| 1517 | { |
| 1518 | return (irc_get_cbr_buffer_delay(ps_rate_control_api->ps_cbr_buffer)); |
| 1519 | } |
| 1520 | |
| 1521 | UWORD32 irc_get_seq_no(rate_control_api_t *ps_rate_control_api) |
| 1522 | { |
| 1523 | return (irc_pic_type_get_disp_order_no(ps_rate_control_api->ps_pic_handling)); |
| 1524 | } |
| 1525 | |
| 1526 | UWORD32 irc_get_rem_frames_in_gop(rate_control_api_t *ps_rate_control_api) |
| 1527 | { |
| 1528 | WORD32 ai4_rem_frms_in_period[MAX_PIC_TYPE]; |
| 1529 | WORD32 j; |
| 1530 | UWORD32 u4_rem_frms_in_period = 0; |
| 1531 | |
| 1532 | /* Get the rem_frms_in_gop & the frms_in_gop from the pic_type state struct */ |
| 1533 | irc_pic_type_get_rem_frms_in_gop(ps_rate_control_api->ps_pic_handling, |
| 1534 | ai4_rem_frms_in_period); |
| 1535 | |
| 1536 | /* Depending on the number of gops in a period, find the num_frms_in_prd */ |
| 1537 | for(j = 0; j < MAX_PIC_TYPE; j++) |
| 1538 | { |
| 1539 | u4_rem_frms_in_period += ai4_rem_frms_in_period[j]; |
| 1540 | } |
| 1541 | |
| 1542 | return (u4_rem_frms_in_period); |
| 1543 | } |
| 1544 | |
| 1545 | /**************************************************************************** |
| 1546 | Function Name : irc_flush_buf_frames |
| 1547 | Description : API call to flush the buffered up frames |
| 1548 | *****************************************************************************/ |
| 1549 | void irc_flush_buf_frames(rate_control_api_t *ps_rate_control_api) |
| 1550 | { |
| 1551 | irc_flush_frame_from_pic_stack(ps_rate_control_api->ps_pic_handling); |
| 1552 | } |
| 1553 | |
| 1554 | /**************************************************************************** |
| 1555 | Function Name : irc_flush_buf_frames |
| 1556 | Description : API call to flush the buffered up frames |
| 1557 | *****************************************************************************/ |
| 1558 | |
| 1559 | void irc_post_encode_frame_skip(rate_control_api_t *ps_rate_control_api, |
| 1560 | picture_type_e e_pic_type) |
| 1561 | { |
| 1562 | irc_skip_encoded_frame(ps_rate_control_api->ps_pic_handling, e_pic_type); |
| 1563 | } |
| 1564 | |
| 1565 | /**************************************************************************** |
| 1566 | Function Name : irc_force_I_frame |
| 1567 | Description : API call to force an I frame |
| 1568 | *****************************************************************************/ |
| 1569 | void irc_force_I_frame(rate_control_api_t *ps_rate_control_api) |
| 1570 | { |
| 1571 | irc_set_force_I_frame_flag(ps_rate_control_api->ps_pic_handling); |
| 1572 | } |
| 1573 | |
| 1574 | /**************************************************************************** |
| 1575 | * Function Name : rc_get_rem_bits_in_gop |
| 1576 | * Description : API call to get remaining bits in GOP |
| 1577 | * *****************************************************************************/ |
| 1578 | WORD32 irc_get_rem_bits_in_period(rate_control_api_t *ps_rate_control_api) |
| 1579 | { |
| 1580 | return (irc_ba_get_rem_bits_in_period( |
| 1581 | ps_rate_control_api->ps_bit_allocation, |
| 1582 | ps_rate_control_api->ps_pic_handling)); |
| 1583 | } |
| 1584 | |
| 1585 | /**************************************************************************** |
| 1586 | * Function Name : irc_get_vbv_buf_fullness |
| 1587 | * Description : API call to get VBV buffer fullness |
| 1588 | ******************************************************************************/ |
| 1589 | WORD32 irc_get_vbv_buf_fullness(rate_control_api_t *ps_rate_control_api) |
| 1590 | { |
| 1591 | return (irc_get_cur_vbv_buf_size(ps_rate_control_api->ps_vbr_storage_vbv)); |
| 1592 | } |
| 1593 | |
| 1594 | WORD32 irc_get_vbv_buf_size(rate_control_api_t *ps_rate_control_api) |
| 1595 | { |
| 1596 | if(ps_rate_control_api->e_rc_type == CBR_NLDRC |
| 1597 | || ps_rate_control_api->e_rc_type == VBR_STREAMING) |
| 1598 | { |
| 1599 | return (irc_get_cbr_buffer_size(ps_rate_control_api->ps_cbr_buffer)); |
| 1600 | } |
| 1601 | else |
| 1602 | { |
| 1603 | return (irc_get_max_vbv_buf_size( |
| 1604 | ps_rate_control_api->ps_vbr_storage_vbv)); |
| 1605 | } |
| 1606 | } |
| 1607 | |
| 1608 | WORD32 irc_get_vbv_fulness_with_cur_bits(rate_control_api_t *ps_rate_control_api, |
| 1609 | UWORD32 u4_bits) |
| 1610 | { |
| 1611 | return (irc_vbv_get_vbv_buf_fullness( |
| 1612 | ps_rate_control_api->ps_vbr_storage_vbv, u4_bits)); |
| 1613 | } |
| 1614 | |
| 1615 | void irc_set_avg_mb_act(rate_control_api_t *ps_rate_control_api, |
| 1616 | WORD32 i4_avg_activity) |
| 1617 | { |
| 1618 | irc_mb_update_frame_level(ps_rate_control_api->ps_mb_rate_control, |
| 1619 | i4_avg_activity); |
| 1620 | return; |
| 1621 | } |