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 | /* User include files */ |
| 26 | #include "irc_datatypes.h" |
| 27 | #include "irc_cntrl_param.h" |
| 28 | #include "irc_mem_req_and_acq.h" |
| 29 | #include "irc_mb_model_based.h" |
| 30 | |
| 31 | typedef struct mb_rate_control_t |
| 32 | { |
| 33 | /* Frame Qp */ |
| 34 | UWORD8 u1_frm_qp; |
| 35 | |
| 36 | /* |
| 37 | * Estimated average activity for the current frame (updated with the |
| 38 | * previous frame activity since it is independent of picture type whether |
| 39 | * it is I or P) |
| 40 | */ |
| 41 | WORD32 i4_avg_activity; |
| 42 | |
| 43 | } mb_rate_control_t; |
| 44 | |
| 45 | WORD32 irc_mbrc_num_fill_use_free_memtab(mb_rate_control_t **pps_mb_rate_control, |
| 46 | itt_memtab_t *ps_memtab, |
| 47 | ITT_FUNC_TYPE_E e_func_type) |
| 48 | { |
| 49 | WORD32 i4_mem_tab_idx = 0; |
Martin Storsjo | 7313602 | 2015-06-23 14:51:06 +0300 | [diff] [blame] | 50 | mb_rate_control_t s_mb_rate_control_temp; |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 51 | |
| 52 | /* |
| 53 | * Hack for al alloc, during which we don't have any state memory. |
| 54 | * Dereferencing can cause issues |
| 55 | */ |
| 56 | if(e_func_type == GET_NUM_MEMTAB || e_func_type == FILL_MEMTAB) |
| 57 | { |
| 58 | (*pps_mb_rate_control) = &s_mb_rate_control_temp; |
| 59 | } |
| 60 | |
| 61 | /*For src rate control state structure*/ |
| 62 | if(e_func_type != GET_NUM_MEMTAB) |
| 63 | { |
| 64 | fill_memtab(&ps_memtab[i4_mem_tab_idx], sizeof(mb_rate_control_t), |
| 65 | ALIGN_128_BYTE, PERSISTENT, DDR); |
| 66 | use_or_fill_base(&ps_memtab[0], (void**)pps_mb_rate_control, |
| 67 | e_func_type); |
| 68 | } |
| 69 | i4_mem_tab_idx++; |
| 70 | |
| 71 | return (i4_mem_tab_idx); |
| 72 | } |
| 73 | |
| 74 | /******************************************************************************* |
| 75 | MB LEVEL API FUNCTIONS |
| 76 | ******************************************************************************/ |
| 77 | |
| 78 | /****************************************************************************** |
| 79 | Description : Initialize the mb model and the average activity to default |
| 80 | values |
| 81 | ******************************************************************************/ |
| 82 | void irc_init_mb_level_rc(mb_rate_control_t *ps_mb_rate_control) |
| 83 | { |
| 84 | /* Set values to default */ |
| 85 | ps_mb_rate_control->i4_avg_activity = 0; |
| 86 | } |
| 87 | |
| 88 | /****************************************************************************** |
| 89 | Description : Initialize the mb state with frame level decisions |
| 90 | *********************************************************************************/ |
| 91 | void irc_mb_init_frame_level(mb_rate_control_t *ps_mb_rate_control, |
| 92 | UWORD8 u1_frame_qp) |
| 93 | { |
| 94 | /* Update frame level QP */ |
| 95 | ps_mb_rate_control->u1_frm_qp = u1_frame_qp; |
| 96 | } |
| 97 | |
| 98 | /****************************************************************************** |
| 99 | Description : Reset the mb activity - Whenever there is SCD |
| 100 | the mb activity is reset |
| 101 | *********************************************************************************/ |
| 102 | void irc_reset_mb_activity(mb_rate_control_t *ps_mb_rate_control) |
| 103 | { |
| 104 | ps_mb_rate_control->i4_avg_activity = 0; |
| 105 | } |
| 106 | |
| 107 | /****************************************************************************** |
| 108 | Description : Calculates the mb level qp |
| 109 | *********************************************************************************/ |
| 110 | void irc_get_mb_qp(mb_rate_control_t *ps_mb_rate_control, |
| 111 | WORD32 i4_cur_mb_activity, |
| 112 | WORD32 *pi4_mb_qp) |
| 113 | { |
| 114 | WORD32 i4_qp; |
| 115 | /* Initialize the mb level qp with the frame level qp */ |
| 116 | i4_qp = ps_mb_rate_control->u1_frm_qp; |
| 117 | |
| 118 | /* |
| 119 | * Store the model based QP - This is used for updating the rate control model |
| 120 | */ |
| 121 | pi4_mb_qp[0] = i4_qp; |
| 122 | |
| 123 | /* Modulate the Qp based on the activity */ |
| 124 | if((ps_mb_rate_control->i4_avg_activity) && (i4_qp < 100)) |
| 125 | { |
| 126 | i4_qp =((((2 * i4_cur_mb_activity)) |
| 127 | + ps_mb_rate_control->i4_avg_activity)* i4_qp |
| 128 | + ((i4_cur_mb_activity + 2 * ps_mb_rate_control->i4_avg_activity) |
| 129 | >> 1))/ (i4_cur_mb_activity + 2 * ps_mb_rate_control->i4_avg_activity); |
| 130 | |
| 131 | if(i4_qp > ((3 * ps_mb_rate_control->u1_frm_qp) >> 1)) |
| 132 | { |
| 133 | i4_qp = ((3 * ps_mb_rate_control->u1_frm_qp) >> 1); |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | /* Store the qp modulated by mb activity - This is used for encoding the MB */ |
| 138 | pi4_mb_qp[1] = i4_qp; |
| 139 | } |
| 140 | |
| 141 | /******************************************************************************* |
| 142 | Description : Returns the stored frame level QP |
| 143 | ******************************************************************************/ |
| 144 | UWORD8 irc_get_frm_level_qp(mb_rate_control_t *ps_mb_rate_control) |
| 145 | { |
| 146 | return (ps_mb_rate_control->u1_frm_qp); |
| 147 | } |
| 148 | |
| 149 | /******************************************************************************* |
| 150 | Description : Update the frame level info collected |
| 151 | ******************************************************************************/ |
| 152 | void irc_mb_update_frame_level(mb_rate_control_t *ps_mb_rate_control, |
| 153 | WORD32 i4_avg_activity) |
| 154 | { |
| 155 | /* Update the Average Activity */ |
| 156 | ps_mb_rate_control->i4_avg_activity = i4_avg_activity; |
| 157 | } |