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104 lines
3.2 KiB
104 lines
3.2 KiB
/****************************************************************************** |
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* |
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* Copyright (C) 2015 The Android Open Source Project |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at: |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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* |
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***************************************************************************** |
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* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore |
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*/ |
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#ifndef _RC_COMMON_H_ |
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#define _RC_COMMON_H_ |
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/**************************************************************************** |
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NOTE : Put only those things into this file which are common across many |
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files, say I_TO_P_BIT_RATIO macro is used across irc_bit_allocation.c |
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and irc_rate_control_api.c.If anything is exclusive only to one file, |
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define it in the same file |
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This file is an RC private file. It should not be exported to Codec |
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****************************************************************************/ |
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#define UNUSED(x) ((void)(x)) |
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typedef float number_t; |
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#define mult32_var_q(a,b,c) *c = a * b |
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#define div32_var_q(a,b,c) (*c = ((b == 0)? a : (a / b))) |
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#define add32_var_q(a,b,c) *c = a + b |
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#define sub32_var_q(a,b,c) *c = a - b |
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#define sqrt32_var_q(a, c) *c = sqrt(a) |
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#define number_t_to_word32(num_a, a) *a = (WORD32)num_a |
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#define convert_float_to_fix(a_f, a) *a = (WORD32)a_f |
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#define convert_fix_to_float(a, a_f) *a_f = (float) a |
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#define SET_VAR_Q(a,b,c) {a = (float) b;} |
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/* Defines the maximum and the minimum quantizer allowed in the stream.*/ |
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#define MAX_MPEG2_QP 255 /* 127*/ |
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/* Bits ratio between I and P frame */ |
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#define I_TO_P_BIT_RATIO 5 |
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/* Calculates P = (X*Y/Z) (Assuming all the four are in integers)*/ |
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#define X_PROD_Y_DIV_Z(X1,Y1,Z1,P1)\ |
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{\ |
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number_t vq_a,vq_b,vq_c;\ |
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SET_VAR_Q(vq_a,(X1),0);\ |
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SET_VAR_Q(vq_b,(Y1),0);\ |
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SET_VAR_Q(vq_c,(Z1),0);\ |
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mult32_var_q(vq_a,vq_b,&vq_a);\ |
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div32_var_q(vq_a,vq_c,&vq_a);\ |
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number_t_to_word32(vq_a,&(P1));\ |
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} |
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#define VQ_A_LT_VQ_B(A,B, Z) Z = A < B; |
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#define VQ_A_GT_VQ_B(A,B, Z) Z = A > B; |
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/* Z=MAX(A,B) where A, B and Z are var_q variables */ |
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#define MAX_VARQ(A,B, Z)\ |
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{\ |
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WORD32 a_gt_b;\ |
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VQ_A_GT_VQ_B((A), (B), a_gt_b);\ |
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(Z) = (a_gt_b) ? (A) : (B);\ |
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} |
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/* Z=MIN(A,B) where A, B and Z are var_q variables */ |
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#define MIN_VARQ(A,B, Z)\ |
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{\ |
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WORD32 a_lt_b;\ |
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VQ_A_LT_VQ_B((A), (B), a_lt_b);\ |
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(Z) = (a_lt_b) ? (A) : (B);\ |
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} |
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/* Maximum number of drain-rates supported. Currently a maximum of only 2 |
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drain-rates supported. One for |
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I pictures and the other for P & B pictures */ |
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#define MAX_NUM_DRAIN_RATES 2 |
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/* The ratios between I to P and P to B Qp is specified here */ |
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#define K_Q 4 |
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#define I_TO_P_RATIO (19) /* In K_Q Q factor */ |
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#define P_TO_B_RATIO (32) /* In K_Q Q factor */ |
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#define P_TO_I_RATIO (13) /* In K_Q Q factor */ |
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#endif /* _RC_COMMON_H_ */ |
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