summaryrefslogtreecommitdiffstats
path: root/common/ih264_weighted_pred.c
diff options
context:
space:
mode:
Diffstat (limited to 'common/ih264_weighted_pred.c')
-rwxr-xr-xcommon/ih264_weighted_pred.c495
1 files changed, 495 insertions, 0 deletions
diff --git a/common/ih264_weighted_pred.c b/common/ih264_weighted_pred.c
new file mode 100755
index 0000000..d5d73f2
--- /dev/null
+++ b/common/ih264_weighted_pred.c
@@ -0,0 +1,495 @@
+/******************************************************************************
+ *
+ * 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
+*/
+/*****************************************************************************/
+/* */
+/* File Name : ih264_weighted_pred.c */
+/* */
+/* Description : Contains function definitions for weighted */
+/* prediction functions */
+/* */
+/* List of Functions : ih264_default_weighted_pred_luma() */
+/* ih264_default_weighted_pred_chroma() */
+/* ih264_weighted_pred_luma() */
+/* ih264_weighted_pred_chroma() */
+/* ih264_weighted_bipred_luma() */
+/* ih264_weighted_bipred_chroma() */
+/* */
+/* Issues / Problems : None */
+/* */
+/* Revision History : */
+/* */
+/* DD MM YYYY Author(s) Changes */
+/* 07 01 2015 Kaushik Initial version */
+/* Senthoor */
+/* */
+/*****************************************************************************/
+/*****************************************************************************/
+/* File Includes */
+/*****************************************************************************/
+
+/* User include files */
+#include "ih264_typedefs.h"
+#include "ih264_macros.h"
+#include "ih264_platform_macros.h"
+#include "ih264_weighted_pred.h"
+
+/*****************************************************************************/
+/* Function definitions . */
+/*****************************************************************************/
+/*****************************************************************************/
+/* */
+/* Function Name : ih264_default_weighted_pred_luma */
+/* */
+/* Description : This function performs the default weighted prediction */
+/* as described in sec 8.4.2.3.1 titled "Default weighted */
+/* sample prediction process" for luma. The function gets */
+/* two ht x wd blocks, calculates their rounded-average and */
+/* stores it in the destination block. (ht,wd) can be */
+/* (4,4), (8,4), (4,8), (8,8), (16,8), (8,16) or (16,16). */
+/* */
+/* Inputs : puc_src1 - Pointer to source 1 */
+/* puc_src2 - Pointer to source 2 */
+/* puc_dst - Pointer to destination */
+/* src_strd1 - stride for source 1 */
+/* src_strd1 - stride for source 2 */
+/* dst_strd - stride for destination */
+/* ht - height of the block */
+/* wd - width of the block */
+/* */
+/* Issues : None */
+/* */
+/* Revision History: */
+/* */
+/* DD MM YYYY Author(s) Changes */
+/* 07 01 2015 Kaushik Initial Version */
+/* Senthoor */
+/* */
+/*****************************************************************************/
+void ih264_default_weighted_pred_luma(UWORD8 *pu1_src1,
+ UWORD8 *pu1_src2,
+ UWORD8 *pu1_dst,
+ WORD32 src_strd1,
+ WORD32 src_strd2,
+ WORD32 dst_strd,
+ WORD32 ht,
+ WORD32 wd)
+{
+ WORD32 i, j;
+
+ src_strd1 -= wd;
+ src_strd2 -= wd;
+ dst_strd -= wd;
+
+ for(i = 0; i < ht; i++)
+ {
+ for(j = 0; j < wd; j++, pu1_src1++, pu1_src2++, pu1_dst++)
+ *pu1_dst = (*pu1_src1 + *pu1_src2 + 1) >> 1;
+
+ pu1_src1 += src_strd1;
+ pu1_src2 += src_strd2;
+ pu1_dst += dst_strd;
+ }
+}
+
+/*****************************************************************************/
+/* */
+/* Function Name : ih264_default_weighted_pred_chroma */
+/* */
+/* Description : This function performs the default weighted prediction */
+/* as described in sec 8.4.2.3.1 titled "Default weighted */
+/* sample prediction process" for chroma. The function gets */
+/* two ht x wd blocks, calculates their rounded-average and */
+/* stores it in the destination block. (ht,wd) can be */
+/* (2,2), (4,2) , (2,4), (4,4), (8,4), (4,8) or (8,8). */
+/* */
+/* Inputs : puc_src1 - Pointer to source 1 */
+/* puc_src2 - Pointer to source 2 */
+/* puc_dst - Pointer to destination */
+/* src_strd1 - stride for source 1 */
+/* src_strd1 - stride for source 2 */
+/* dst_strd - stride for destination */
+/* ht - height of the block */
+/* wd - width of the block */
+/* */
+/* Issues : None */
+/* */
+/* Revision History: */
+/* */
+/* DD MM YYYY Author(s) Changes */
+/* 07 01 2015 Kaushik Initial Version */
+/* Senthoor */
+/* */
+/*****************************************************************************/
+void ih264_default_weighted_pred_chroma(UWORD8 *pu1_src1,
+ UWORD8 *pu1_src2,
+ UWORD8 *pu1_dst,
+ WORD32 src_strd1,
+ WORD32 src_strd2,
+ WORD32 dst_strd,
+ WORD32 ht,
+ WORD32 wd)
+{
+ WORD32 i, j;
+
+ wd = wd << 1;
+
+ src_strd1 -= wd;
+ src_strd2 -= wd;
+ dst_strd -= wd;
+
+ for(i = 0; i < ht; i++)
+ {
+ for(j = 0; j < wd; j++, pu1_src1++, pu1_src2++, pu1_dst++)
+ *pu1_dst = (*pu1_src1 + *pu1_src2 + 1) >> 1;
+
+ pu1_src1 += src_strd1;
+ pu1_src2 += src_strd2;
+ pu1_dst += dst_strd;
+ }
+}
+
+/*****************************************************************************/
+/* */
+/* Function Name : ih264_weighted_pred_luma */
+/* */
+/* Description : This function performs the weighted prediction as */
+/* described in sec 8.4.2.3.2 titled "Weighted sample */
+/* prediction process" for luma. The function gets one */
+/* ht x wd block, weights it, rounds it off, offsets it, */
+/* saturates it to unsigned 8-bit and stores it in the */
+/* destination block. (ht,wd) can be (4,4), (8,4), (4,8), */
+/* (8,8), (16,8), (8,16) or (16,16). */
+/* */
+/* Inputs : puc_src - Pointer to source */
+/* puc_dst - Pointer to destination */
+/* src_strd - stride for source */
+/* dst_strd - stride for destination */
+/* log_wd - number of bits to be rounded off */
+/* wt - weight value */
+/* ofst - offset value */
+/* ht - height of the block */
+/* wd - width of the block */
+/* */
+/* Issues : None */
+/* */
+/* Revision History: */
+/* */
+/* DD MM YYYY Author(s) Changes */
+/* 07 01 2015 Kaushik Initial Version */
+/* Senthoor */
+/* */
+/*****************************************************************************/
+void ih264_weighted_pred_luma(UWORD8 *pu1_src,
+ UWORD8 *pu1_dst,
+ WORD32 src_strd,
+ WORD32 dst_strd,
+ WORD32 log_wd,
+ WORD32 wt,
+ WORD32 ofst,
+ WORD32 ht,
+ WORD32 wd)
+{
+ WORD32 i, j;
+
+ wt = (WORD16)(wt & 0xffff);
+ ofst = (WORD8)(ofst & 0xff);
+
+ src_strd -= wd;
+ dst_strd -= wd;
+
+ if(log_wd >= 1)
+ {
+ WORD32 i_ofst = (1 << (log_wd - 1)) + (ofst << log_wd);
+ for(i = 0; i < ht; i++)
+ {
+ for(j = 0; j < wd; j++, pu1_src++, pu1_dst++)
+ *pu1_dst = CLIP_U8((wt * (*pu1_src) + i_ofst) >> log_wd);
+
+ pu1_src += src_strd;
+ pu1_dst += dst_strd;
+ }
+ }
+ else
+ {
+ for(i = 0; i < ht; i++)
+ {
+ for(j = 0; j < wd; j++, pu1_src++, pu1_dst++)
+ *pu1_dst = CLIP_U8(wt * (*pu1_src) + ofst);
+
+ pu1_src += src_strd;
+ pu1_dst += dst_strd;
+ }
+ }
+}
+
+/*****************************************************************************/
+/* */
+/* Function Name : ih264_weighted_pred_chroma */
+/* */
+/* Description : This function performs the weighted prediction as */
+/* described in sec 8.4.2.3.2 titled "Weighted sample */
+/* prediction process" for chroma. The function gets one */
+/* ht x wd block, weights it, rounds it off, offsets it, */
+/* saturates it to unsigned 8-bit and stores it in the */
+/* destination block. (ht,wd) can be (2,2), (4,2), (2,4), */
+/* (4,4), (8,4), (4,8) or (8,8). */
+/* */
+/* Inputs : puc_src - Pointer to source */
+/* puc_dst - Pointer to destination */
+/* src_strd - stride for source */
+/* dst_strd - stride for destination */
+/* log_wd - number of bits to be rounded off */
+/* wt - weight values for u and v */
+/* ofst - offset values for u and v */
+/* ht - height of the block */
+/* wd - width of the block */
+/* */
+/* Issues : None */
+/* */
+/* Revision History: */
+/* */
+/* DD MM YYYY Author(s) Changes */
+/* 07 01 2015 Kaushik Initial Version */
+/* Senthoor */
+/* */
+/*****************************************************************************/
+void ih264_weighted_pred_chroma(UWORD8 *pu1_src,
+ UWORD8 *pu1_dst,
+ WORD32 src_strd,
+ WORD32 dst_strd,
+ WORD32 log_wd,
+ WORD32 wt,
+ WORD32 ofst,
+ WORD32 ht,
+ WORD32 wd)
+{
+ WORD32 i, j;
+ WORD32 wt_u, wt_v;
+ WORD32 ofst_u, ofst_v;
+
+ wt_u = (WORD16)(wt & 0xffff);
+ wt_v = (WORD16)(wt >> 16);
+
+ ofst_u = (WORD8)(ofst & 0xff);
+ ofst_v = (WORD8)(ofst >> 8);
+
+ src_strd -= wd << 1;
+ dst_strd -= wd << 1;
+
+ if(log_wd >= 1)
+ {
+ ofst_u = (1 << (log_wd - 1)) + (ofst_u << log_wd);
+ ofst_v = (1 << (log_wd - 1)) + (ofst_v << log_wd);
+
+ for(i = 0; i < ht; i++)
+ {
+ for(j = 0; j < wd; j++, pu1_src++, pu1_dst++)
+ {
+ *pu1_dst = CLIP_U8((wt_u * (*pu1_src) + ofst_u) >> log_wd);
+ pu1_src++;
+ pu1_dst++;
+ *pu1_dst = CLIP_U8((wt_v * (*pu1_src) + ofst_v) >> log_wd);
+ }
+ pu1_src += src_strd;
+ pu1_dst += dst_strd;
+ }
+ }
+ else
+ {
+ for(i = 0; i < ht; i++)
+ {
+ for(j = 0; j < wd; j++, pu1_src++, pu1_dst++)
+ {
+ *pu1_dst = CLIP_U8(wt_u * (*pu1_src) + ofst_u);
+ pu1_src++;
+ pu1_dst++;
+ *pu1_dst = CLIP_U8(wt_v * (*pu1_src) + ofst_v);
+ }
+ pu1_src += src_strd;
+ pu1_dst += dst_strd;
+ }
+ }
+}
+
+/*****************************************************************************/
+/* */
+/* Function Name : ih264_weighted_bi_pred_luma */
+/* */
+/* Description : This function performs the weighted biprediction as */
+/* described in sec 8.4.2.3.2 titled "Weighted sample */
+/* prediction process" for luma. The function gets two */
+/* ht x wd blocks, weights them, adds them, rounds off the */
+/* sum, offsets it, saturates it to unsigned 8-bit and */
+/* stores it in the destination block. (ht,wd) can be */
+/* (4,4), (8,4), (4,8), (8,8), (16,8), (8,16) or (16,16). */
+/* */
+/* Inputs : puc_src1 - Pointer to source 1 */
+/* puc_src2 - Pointer to source 2 */
+/* puc_dst - Pointer to destination */
+/* src_strd1 - stride for source 1 */
+/* src_strd2 - stride for source 2 */
+/* dst_strd2 - stride for destination */
+/* log_wd - number of bits to be rounded off */
+/* wt1 - weight value for source 1 */
+/* wt2 - weight value for source 2 */
+/* ofst1 - offset value for source 1 */
+/* ofst2 - offset value for source 2 */
+/* ht - height of the block */
+/* wd - width of the block */
+/* */
+/* Issues : None */
+/* */
+/* Revision History: */
+/* */
+/* DD MM YYYY Author(s) Changes */
+/* 07 01 2015 Kaushik Initial Version */
+/* Senthoor */
+/* */
+/*****************************************************************************/
+void ih264_weighted_bi_pred_luma(UWORD8 *pu1_src1,
+ UWORD8 *pu1_src2,
+ UWORD8 *pu1_dst,
+ WORD32 src_strd1,
+ WORD32 src_strd2,
+ WORD32 dst_strd,
+ WORD32 log_wd,
+ WORD32 wt1,
+ WORD32 wt2,
+ WORD32 ofst1,
+ WORD32 ofst2,
+ WORD32 ht,
+ WORD32 wd)
+{
+ WORD32 i, j;
+ WORD32 shft, ofst;
+
+ ofst1 = (WORD8)(ofst1 & 0xff);
+ ofst2 = (WORD8)(ofst2 & 0xff);
+ wt1 = (WORD16)(wt1 & 0xffff);
+ wt2 = (WORD16)(wt2 & 0xffff);
+ ofst = (ofst1 + ofst2 + 1) >> 1;
+
+ shft = log_wd + 1;
+ ofst = (1 << log_wd) + (ofst << shft);
+
+ src_strd1 -= wd;
+ src_strd2 -= wd;
+ dst_strd -= wd;
+
+ for(i = 0; i < ht; i++)
+ {
+ for(j = 0; j < wd; j++, pu1_src1++, pu1_src2++, pu1_dst++)
+ *pu1_dst = CLIP_U8((wt1 * (*pu1_src1) + wt2 * (*pu1_src2) + ofst) >> shft);
+
+ pu1_src1 += src_strd1;
+ pu1_src2 += src_strd2;
+ pu1_dst += dst_strd;
+ }
+}
+
+/*****************************************************************************/
+/* */
+/* Function Name : ih264_weighted_bi_pred_chroma */
+/* */
+/* Description : This function performs the weighted biprediction as */
+/* described in sec 8.4.2.3.2 titled "Weighted sample */
+/* prediction process" for chroma. The function gets two */
+/* ht x wd blocks, weights them, adds them, rounds off the */
+/* sum, offsets it, saturates it to unsigned 8-bit and */
+/* stores it in the destination block. (ht,wd) can be */
+/* (2,2), (4,2), (2,4), (4,4), (8,4), (4,8) or (8,8). */
+/* */
+/* Inputs : puc_src1 - Pointer to source 1 */
+/* puc_src2 - Pointer to source 2 */
+/* puc_dst - Pointer to destination */
+/* src_strd1 - stride for source 1 */
+/* src_strd2 - stride for source 2 */
+/* dst_strd2 - stride for destination */
+/* log_wd - number of bits to be rounded off */
+/* wt1 - weight values for u and v in source 1 */
+/* wt2 - weight values for u and v in source 2 */
+/* ofst1 - offset value for u and v in source 1 */
+/* ofst2 - offset value for u and v in source 2 */
+/* ht - height of the block */
+/* wd - width of the block */
+/* */
+/* Issues : None */
+/* */
+/* Revision History: */
+/* */
+/* DD MM YYYY Author(s) Changes */
+/* 07 01 2015 Kaushik Initial Version */
+/* Senthoor */
+/* */
+/*****************************************************************************/
+void ih264_weighted_bi_pred_chroma(UWORD8 *pu1_src1,
+ UWORD8 *pu1_src2,
+ UWORD8 *pu1_dst,
+ WORD32 src_strd1,
+ WORD32 src_strd2,
+ WORD32 dst_strd,
+ WORD32 log_wd,
+ WORD32 wt1,
+ WORD32 wt2,
+ WORD32 ofst1,
+ WORD32 ofst2,
+ WORD32 ht,
+ WORD32 wd)
+{
+ WORD32 i, j;
+ WORD32 wt1_u, wt1_v, wt2_u, wt2_v;
+ WORD32 ofst1_u, ofst1_v, ofst2_u, ofst2_v;
+ WORD32 ofst_u, ofst_v;
+ WORD32 shft;
+
+ ofst1_u = (WORD8)(ofst1 & 0xff);
+ ofst1_v = (WORD8)(ofst1 >> 8);
+ ofst2_u = (WORD8)(ofst2 & 0xff);
+ ofst2_v = (WORD8)(ofst2 >> 8);
+ wt1_u = (WORD16)(wt1 & 0xffff);
+ wt1_v = (WORD16)(wt1 >> 16);
+ wt2_u = (WORD16)(wt2 & 0xffff);
+ wt2_v = (WORD16)(wt2 >> 16);
+ ofst_u = (ofst1_u + ofst2_u + 1) >> 1;
+ ofst_v = (ofst1_v + ofst2_v + 1) >> 1;
+
+ src_strd1 -= wd << 1;
+ src_strd2 -= wd << 1;
+ dst_strd -= wd << 1;
+
+ shft = log_wd + 1;
+ ofst_u = (1 << log_wd) + (ofst_u << shft);
+ ofst_v = (1 << log_wd) + (ofst_v << shft);
+
+ for(i = 0; i < ht; i++)
+ {
+ for(j = 0; j < wd; j++, pu1_src1++, pu1_src2++, pu1_dst++)
+ {
+ *pu1_dst = CLIP_U8((wt1_u * (*pu1_src1) + wt2_u * (*pu1_src2) + ofst_u) >> shft);
+ pu1_src1++;
+ pu1_src2++;
+ pu1_dst++;
+ *pu1_dst = CLIP_U8((wt1_v * (*pu1_src1) + wt2_v * (*pu1_src2) + ofst_v) >> shft);
+ }
+ pu1_src1 += src_strd1;
+ pu1_src2 += src_strd2;
+ pu1_dst += dst_strd;
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-28 17:13:20 +0000