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-rw-r--r--common/ih264_ihadamard_scaling.c280
1 files changed, 164 insertions, 116 deletions
diff --git a/common/ih264_ihadamard_scaling.c b/common/ih264_ihadamard_scaling.c
index e4729c8..0e265f7 100644
--- a/common/ih264_ihadamard_scaling.c
+++ b/common/ih264_ihadamard_scaling.c
@@ -17,74 +17,82 @@
*****************************************************************************
* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
*/
+
/**
- *******************************************************************************
- * @file
- * ih264_ihadamard_scaling.c
- *
- * @brief
- * Contains definition of functions for h264 inverse hadamard 4x4 transform and scaling
- *
- * @author
- * Mohit
- *
- * @par List of Functions:
- * - ih264_ihadamard_scaling_4x4()
- *
- * @remarks
- *
- *******************************************************************************
- */
+*******************************************************************************
+* @file
+* ih264_ihadamard_scaling.c
+*
+* @brief
+* Contains definition of functions for h264 inverse hadamard 4x4 transform and
+* scaling
+*
+* @author
+* ittiam
+*
+* @par List of Functions:
+* - ih264_ihadamard_scaling_4x4
+* - ih264_ihadamard_scaling_2x2_uv
+*
+* @remarks
+* none
+*
+*******************************************************************************
+*/
/*****************************************************************************/
/* File Includes */
/*****************************************************************************/
-/* User include files */
+/* User Include Files */
#include "ih264_typedefs.h"
+#include "ih264_macros.h"
#include "ih264_defs.h"
#include "ih264_trans_macros.h"
-#include "ih264_macros.h"
#include "ih264_trans_data.h"
#include "ih264_size_defs.h"
#include "ih264_structs.h"
#include "ih264_trans_quant_itrans_iquant.h"
-/*
- ********************************************************************************
- *
- * @brief This function performs a 4x4 inverse hadamard transform on the 4x4 DC coefficients
- * of a 16x16 intra prediction macroblock, and then performs scaling.
- * prediction buffer
- *
- * @par Description:
- * The DC coefficients pass through a 2-stage inverse hadamard transform.
- * This inverse transformed content is scaled to based on Qp value.
- *
- * @param[in] pi2_src
- * input 4x4 block of DC coefficients
- *
- * @param[out] pi2_out
- * output 4x4 block
- *
- * @param[in] pu2_iscal_mat
- * pointer to scaling list
- *
- * @param[in] pu2_weigh_mat
- * pointer to weight matrix
- *
- * @param[in] u4_qp_div_6
- * Floor (qp/6)
- *
- * @param[in] pi4_tmp
- * temporary buffer of size 1*16
- *
- * @returns none
- *
- * @remarks none
- *
- *******************************************************************************
- */
+
+/*****************************************************************************/
+/* Function Definitions */
+/*****************************************************************************/
+
+/**
+********************************************************************************
+*
+* @brief This function performs a 4x4 inverse hadamard transform on the luma
+* DC coefficients and then performs scaling.
+*
+* @par Description:
+* The DC coefficients pass through a 2-stage inverse hadamard transform.
+* This inverse transformed content is scaled to based on Qp value.
+*
+* @param[in] pi2_src
+* input 4x4 block of DC coefficients
+*
+* @param[out] pi2_out
+* output 4x4 block
+*
+* @param[in] pu2_iscal_mat
+* pointer to scaling list
+*
+* @param[in] pu2_weigh_mat
+* pointer to weight matrix
+*
+* @param[in] u4_qp_div_6
+* Floor (qp/6)
+*
+* @param[in] pi4_tmp
+* temporary buffer of size 1*16
+*
+* @returns none
+*
+* @remarks none
+*
+*******************************************************************************
+*/
void ih264_ihadamard_scaling_4x4(WORD16* pi2_src,
WORD16* pi2_out,
const UWORD16 *pu2_iscal_mat,
@@ -94,13 +102,15 @@ void ih264_ihadamard_scaling_4x4(WORD16* pi2_src,
{
WORD32 i;
WORD32 x0, x1, x2, x3, x4, x5, x6, x7;
- WORD16* pi2_src_ptr, *pi2_out_ptr;
- WORD32* pi4_tmp_ptr;
+ WORD16 *pi2_src_ptr, *pi2_out_ptr;
+ WORD32 *pi4_tmp_ptr;
WORD32 rnd_fact = (u4_qp_div_6 < 6) ? (1 << (5 - u4_qp_div_6)) : 0;
+
pi4_tmp_ptr = pi4_tmp;
pi2_src_ptr = pi2_src;
pi2_out_ptr = pi2_out;
- // Horizontal transform
+
+ /* horizontal transform */
for(i = 0; i < SUB_BLK_WIDTH_4x4; i++)
{
x4 = pi2_src_ptr[0];
@@ -121,8 +131,9 @@ void ih264_ihadamard_scaling_4x4(WORD16* pi2_src,
pi4_tmp_ptr += SUB_BLK_WIDTH_4x4;
pi2_src_ptr += SUB_BLK_WIDTH_4x4;
}
+
+ /* vertical transform */
pi4_tmp_ptr = pi4_tmp;
- // Vertical Transform
for(i = 0; i < SUB_BLK_WIDTH_4x4; i++)
{
x4 = pi4_tmp_ptr[0];
@@ -143,15 +154,50 @@ void ih264_ihadamard_scaling_4x4(WORD16* pi2_src,
pi4_tmp_ptr++;
}
pi4_tmp_ptr = pi4_tmp;
- //Scaling
+
+ /* scaling */
for(i = 0; i < (SUB_BLK_WIDTH_4x4 * SUB_BLK_WIDTH_4x4); i++)
{
- INV_QUANT(pi4_tmp_ptr[i], pu2_iscal_mat[0], pu2_weigh_mat[0], u4_qp_div_6,
- rnd_fact, 6);
- pi2_out_ptr[i] = pi4_tmp_ptr[i];
+ INV_QUANT(pi4_tmp_ptr[i], pu2_iscal_mat[0], pu2_weigh_mat[0],
+ u4_qp_div_6, rnd_fact, 6);
+ pi2_out_ptr[i] = pi4_tmp_ptr[i];
}
}
+/**
+********************************************************************************
+*
+* @brief This function performs a 2x2 inverse hadamard transform on the chroma
+* DC coefficients and then performs scaling.
+*
+* @par Description:
+* The DC coefficients pass through a 2-stage inverse hadamard transform.
+* This inverse transformed content is scaled to based on Qp value.
+*
+* @param[in] pi2_src
+* input 2x2 block of DC coefficients
+*
+* @param[out] pi2_out
+* output 2x2 block
+*
+* @param[in] pu2_iscal_mat
+* pointer to scaling list
+*
+* @param[in] pu2_weigh_mat
+* pointer to weight matrix
+*
+* @param[in] u4_qp_div_6
+* Floor (qp/6)
+*
+* @param[in] pi4_tmp
+* temporary buffer of size 1*16
+*
+* @returns none
+*
+* @remarks none
+*
+*******************************************************************************
+*/
void ih264_ihadamard_scaling_2x2_uv(WORD16* pi2_src,
WORD16* pi2_out,
const UWORD16 *pu2_iscal_mat,
@@ -159,58 +205,60 @@ void ih264_ihadamard_scaling_2x2_uv(WORD16* pi2_src,
UWORD32 u4_qp_div_6,
WORD32* pi4_tmp)
{
- WORD32 i4_x0,i4_x1,i4_x2,i4_x3,i4_x4,i4_x5,i4_x6,i4_x7;
- WORD32 i4_y0,i4_y1,i4_y2,i4_y3,i4_y4,i4_y5,i4_y6,i4_y7;
-
- UNUSED(pi4_tmp);
-
- i4_x4 = pi2_src[0];
- i4_x5 = pi2_src[1];
- i4_x6 = pi2_src[2];
- i4_x7 = pi2_src[3];
-
- i4_x0 = i4_x4 + i4_x5;
- i4_x1 = i4_x4 - i4_x5;
- i4_x2 = i4_x6 + i4_x7;
- i4_x3 = i4_x6 - i4_x7;
-
- i4_x4 = i4_x0+i4_x2;
- i4_x5 = i4_x1+i4_x3;
- i4_x6 = i4_x0-i4_x2;
- i4_x7 = i4_x1-i4_x3;
-
- INV_QUANT(i4_x4,pu2_iscal_mat[0],pu2_weigh_mat[0],u4_qp_div_6,0,5);
- INV_QUANT(i4_x5,pu2_iscal_mat[0],pu2_weigh_mat[0],u4_qp_div_6,0,5);
- INV_QUANT(i4_x6,pu2_iscal_mat[0],pu2_weigh_mat[0],u4_qp_div_6,0,5);
- INV_QUANT(i4_x7,pu2_iscal_mat[0],pu2_weigh_mat[0],u4_qp_div_6,0,5);
-
- pi2_out[0] = i4_x4;
- pi2_out[1] = i4_x5;
- pi2_out[2] = i4_x6;
- pi2_out[3] = i4_x7;
-
- i4_y4 = pi2_src[4];
- i4_y5 = pi2_src[5];
- i4_y6 = pi2_src[6];
- i4_y7 = pi2_src[7];
-
- i4_y0 = i4_y4 + i4_y5;
- i4_y1 = i4_y4 - i4_y5;
- i4_y2 = i4_y6 + i4_y7;
- i4_y3 = i4_y6 - i4_y7;
-
- i4_y4 = i4_y0+i4_y2;
- i4_y5 = i4_y1+i4_y3;
- i4_y6 = i4_y0-i4_y2;
- i4_y7 = i4_y1-i4_y3;
-
- INV_QUANT(i4_y4,pu2_iscal_mat[0],pu2_weigh_mat[0],u4_qp_div_6,0,5);
- INV_QUANT(i4_y5,pu2_iscal_mat[0],pu2_weigh_mat[0],u4_qp_div_6,0,5);
- INV_QUANT(i4_y6,pu2_iscal_mat[0],pu2_weigh_mat[0],u4_qp_div_6,0,5);
- INV_QUANT(i4_y7,pu2_iscal_mat[0],pu2_weigh_mat[0],u4_qp_div_6,0,5);
-
- pi2_out[4] = i4_y4;
- pi2_out[5] = i4_y5;
- pi2_out[6] = i4_y6;
- pi2_out[7] = i4_y7;
+ WORD32 i4_x0, i4_x1, i4_x2, i4_x3, i4_x4, i4_x5, i4_x6, i4_x7;
+ WORD32 i4_y0, i4_y1, i4_y2, i4_y3, i4_y4, i4_y5, i4_y6, i4_y7;
+
+ UNUSED(pi4_tmp);
+
+ /* U Plane */
+ i4_x4 = pi2_src[0];
+ i4_x5 = pi2_src[1];
+ i4_x6 = pi2_src[2];
+ i4_x7 = pi2_src[3];
+
+ i4_x0 = i4_x4 + i4_x5;
+ i4_x1 = i4_x4 - i4_x5;
+ i4_x2 = i4_x6 + i4_x7;
+ i4_x3 = i4_x6 - i4_x7;
+
+ i4_x4 = i4_x0 + i4_x2;
+ i4_x5 = i4_x1 + i4_x3;
+ i4_x6 = i4_x0 - i4_x2;
+ i4_x7 = i4_x1 - i4_x3;
+
+ INV_QUANT(i4_x4, pu2_iscal_mat[0], pu2_weigh_mat[0], u4_qp_div_6, 0, 5);
+ INV_QUANT(i4_x5, pu2_iscal_mat[0], pu2_weigh_mat[0], u4_qp_div_6, 0, 5);
+ INV_QUANT(i4_x6, pu2_iscal_mat[0], pu2_weigh_mat[0], u4_qp_div_6, 0, 5);
+ INV_QUANT(i4_x7, pu2_iscal_mat[0], pu2_weigh_mat[0], u4_qp_div_6, 0, 5);
+
+ pi2_out[0] = i4_x4;
+ pi2_out[1] = i4_x5;
+ pi2_out[2] = i4_x6;
+ pi2_out[3] = i4_x7;
+
+ /* V Plane */
+ i4_y4 = pi2_src[4];
+ i4_y5 = pi2_src[5];
+ i4_y6 = pi2_src[6];
+ i4_y7 = pi2_src[7];
+
+ i4_y0 = i4_y4 + i4_y5;
+ i4_y1 = i4_y4 - i4_y5;
+ i4_y2 = i4_y6 + i4_y7;
+ i4_y3 = i4_y6 - i4_y7;
+
+ i4_y4 = i4_y0 + i4_y2;
+ i4_y5 = i4_y1 + i4_y3;
+ i4_y6 = i4_y0 - i4_y2;
+ i4_y7 = i4_y1 - i4_y3;
+
+ INV_QUANT(i4_y4, pu2_iscal_mat[0], pu2_weigh_mat[0], u4_qp_div_6, 0, 5);
+ INV_QUANT(i4_y5, pu2_iscal_mat[0], pu2_weigh_mat[0], u4_qp_div_6, 0, 5);
+ INV_QUANT(i4_y6, pu2_iscal_mat[0], pu2_weigh_mat[0], u4_qp_div_6, 0, 5);
+ INV_QUANT(i4_y7, pu2_iscal_mat[0], pu2_weigh_mat[0], u4_qp_div_6, 0, 5);
+
+ pi2_out[4] = i4_y4;
+ pi2_out[5] = i4_y5;
+ pi2_out[6] = i4_y6;
+ pi2_out[7] = i4_y7;
}
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