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/******************************************************************************
*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*****************************************************************************
* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
*/
#ifndef _RC_COMMON_H_
#define _RC_COMMON_H_
/****************************************************************************
NOTE : Put only those things into this file which are common across many
files, say I_TO_P_BIT_RATIO macro is used across irc_bit_allocation.c
and irc_rate_control_api.c.If anything is exclusive only to one file,
define it in the same file
This file is an RC private file. It should not be exported to Codec
****************************************************************************/
#define UNUSED(x) ((void)(x))
typedef float number_t;
#define mult32_var_q(a,b,c) *c = a * b
#define div32_var_q(a,b,c) (*c = ((b == 0)? a : (a / b)))
#define add32_var_q(a,b,c) *c = a + b
#define sub32_var_q(a,b,c) *c = a - b
#define sqrt32_var_q(a, c) *c = sqrt(a)
#define number_t_to_word32(num_a, a) *a = (WORD32)num_a
#define convert_float_to_fix(a_f, a) *a = (WORD32)a_f
#define convert_fix_to_float(a, a_f) *a_f = (float) a
#define SET_VAR_Q(a,b,c) {a = (float) b;}
/* Defines the maximum and the minimum quantizer allowed in the stream.*/
#define MAX_MPEG2_QP 255 /* 127*/
/* Bits ratio between I and P frame */
#define I_TO_P_BIT_RATIO 5
/* Calculates P = (X*Y/Z) (Assuming all the four are in integers)*/
#define X_PROD_Y_DIV_Z(X1,Y1,Z1,P1)\
{\
number_t vq_a,vq_b,vq_c;\
SET_VAR_Q(vq_a,(X1),0);\
SET_VAR_Q(vq_b,(Y1),0);\
SET_VAR_Q(vq_c,(Z1),0);\
mult32_var_q(vq_a,vq_b,&vq_a);\
div32_var_q(vq_a,vq_c,&vq_a);\
number_t_to_word32(vq_a,&(P1));\
}
#define VQ_A_LT_VQ_B(A,B, Z) Z = A < B;
#define VQ_A_GT_VQ_B(A,B, Z) Z = A > B;
/* Z=MAX(A,B) where A, B and Z are var_q variables */
#define MAX_VARQ(A,B, Z)\
{\
WORD32 a_gt_b;\
VQ_A_GT_VQ_B((A), (B), a_gt_b);\
(Z) = (a_gt_b) ? (A) : (B);\
}
/* Z=MIN(A,B) where A, B and Z are var_q variables */
#define MIN_VARQ(A,B, Z)\
{\
WORD32 a_lt_b;\
VQ_A_LT_VQ_B((A), (B), a_lt_b);\
(Z) = (a_lt_b) ? (A) : (B);\
}
/* Maximum number of drain-rates supported. Currently a maximum of only 2
drain-rates supported. One for
I pictures and the other for P & B pictures */
#define MAX_NUM_DRAIN_RATES 2
/* The ratios between I to P and P to B Qp is specified here */
#define K_Q 4
#define I_TO_P_RATIO (19) /* In K_Q Q factor */
#define P_TO_B_RATIO (21) /* In K_Q Q factor */
#define P_TO_I_RATIO (13) /* In K_Q Q factor */
#endif /* _RC_COMMON_H_ */
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