diff options
Diffstat (limited to 'decoder/arm/ihevcd_fmt_conv_420sp_to_420p.s')
| -rw-r--r-- | decoder/arm/ihevcd_fmt_conv_420sp_to_420p.s | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/decoder/arm/ihevcd_fmt_conv_420sp_to_420p.s b/decoder/arm/ihevcd_fmt_conv_420sp_to_420p.s new file mode 100644 index 0000000..c1d09ed --- /dev/null +++ b/decoder/arm/ihevcd_fmt_conv_420sp_to_420p.s @@ -0,0 +1,203 @@ +@/***************************************************************************** +@* +@* Copyright (C) 2012 Ittiam Systems Pvt Ltd, Bangalore +@* +@* 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. +@* +@*****************************************************************************/ +@/** +@/******************************************************************************* +@* @file +@* ihevcd_fmt_conv_420sp_to_420p.s +@* +@* @brief +@* contains function definitions for format conversions +@* +@* @author +@* ittiam +@* +@* @par list of functions: +@* +@* +@* @remarks +@* none +@* +@*******************************************************************************/ + + + + + + + + +.text + + + + + +@/***************************************************************************** +@* * +@* Function Name : neon_copy_yuv420sp_to_yuv420p() * +@* * +@* Description : This function conversts the image from YUV420sP color * +@* space to 420SP color space(UV interleaved). * +@* * +@* Arguments : R0 pu1_src_y * +@* R1 pu1_src_uv * +@* R2 pu1_dest_y * +@* R3 pu1_dest_u * +@* [R13 #40] pu1_dest_v * +@* [R13 #44] u2_width * +@* [R13 #48] u2_height * +@* [R13 #52] u2_stridey * +@* [R13 #56] u2_strideuv * +@* [R13 #60] u2_dest_stridey * +@* [R13 #64] u2_dest_strideuv * +@* [R13 #68] is_u_first * +@* [R13 #72] disable_luma_copy * +@* * +@* Values Returned : None * +@* * +@* Register Usage : R0 - R14 * +@* * +@* Stack Usage : 40 Bytes * +@* * +@* Interruptibility : Interruptible * +@* * +@* Known Limitations * +@* Assumptions: Image Width: Assumed to be multiple of 2 and * +@* Image Height: Assumed to be even. * +@* * +@* Revision History : * +@* DD MM YYYY Author(s) Changes (Describe the changes made) * +@* 16 05 2012 Naveen SR draft * +@* * +@*****************************************************************************/ + +.globl ihevcd_fmt_conv_420sp_to_420p_a9q + +.type ihevcd_fmt_conv_420sp_to_420p_a9q, %function + +ihevcd_fmt_conv_420sp_to_420p_a9q: + STMFD sp!,{r4-r12, lr} + + LDR r5,[sp,#60] @//Load u2_dest_stridey +@ LDR r6,[sp,#56] @//Load u2_strideuv + LDR r7,[sp,#52] @//Load u2_stridey + LDR r8,[sp,#44] @//Load u2_width + LDR r9,[sp,#48] @//Load u2_height + + SUB r10,r7,r8 @// Src Y increment + SUB r11,r5,r8 @// Dst Y increment + + LDR r5,[sp,#72] @//Load disable_luma_copy flag + CMP r5,#0 @//skip luma if disable_luma_copy is non-zero + BNE uv_copy_start + + @/* Copy Y */ + + MOV r4,r9 @// Copying height +y_row_loop: + MOV r6,r8 @// Copying width + +y_col_loop: + + SUB r6,r6,#16 + vld1.8 {d0,d1},[r0]! + vst1.8 {d0,d1},[r2]! + CMP r6,#16 + BGE y_col_loop + CMP r6,#0 + BEQ y_col_loop_end + @//If non-multiple of 16, then go back by few bytes to ensure 16 bytes can be read + @//Ex if width is 162, above loop will process 160 pixels. And + @//Both source and destination will point to 146th pixel and then 16 bytes will be read + @// and written using VLD1 and VST1 + RSB r6,r6,#16 + SUB r0,r0,r6 + SUB r2,r2,r6 + vld1.8 {d0,d1}, [r0]! + vst1.8 {d0,d1}, [r2]! + +y_col_loop_end: + ADD r0, r0, r10 + ADD r2, r2, r11 + SUBS r4, r4, #1 + BGT y_row_loop + + + @/* Copy UV */ +uv_copy_start: + + LDR r5,[sp,#64] @//Load u2_dest_strideuv + LDR r7,[sp,#56] @//Load u2_strideuv + + MOV r9,r9,LSR #1 @// height/2 +@ MOV r8,r8,LSR #1 @// Width/2 + + SUB r10,r7,r8 @// Src UV increment + MOV r11,r8,LSR #1 + SUB r11,r5,r11 @// Dst U and V increment + + LDR r5,[sp,#40] @//Load pu1_dest_v + + LDR r4,[sp,#68] @//Load is_u_first_flag + CMP r4,#0 @//Swap U and V dest if is_u_first_flag is zero + MOVEQ r4,r5 + MOVEQ r5,r3 + MOVEQ r3,r4 + + MOV r4,r9 @// Copying height +uv_row_loop: + MOV r6,r8 @// Copying width + +uv_col_loop: + + SUB r6,r6,#16 + + PLD [r1,#128] + vld2.8 {d0,d1},[r1]! + VST1.8 D0,[r3]! + VST1.8 D1,[r5]! + CMP r6,#16 + BGE uv_col_loop + CMP r6,#0 + BEQ uv_col_loop_end + @//If non-multiple of 16, then go back by few bytes to ensure 16 bytes can be read + @//Ex if width is 162, above loop will process 160 pixels. And + @//Both source and destination will point to 146th pixel and then 16 bytes will be read + @// and written using VLD1 and VST1 + RSB r6,r6,#16 + SUB r1,r1,r6 + SUB r3,r3,r6,LSR #1 + SUB r5,r5,r6,LSR #1 + vld2.8 {d0,d1}, [r1]! + VST1.8 D0, [r3]! + VST1.8 D1, [r5]! +uv_col_loop_end: + ADD r1, r1, r10 + ADD r3, r3, r11 + ADD r5, r5, r11 + SUBS r4, r4, #1 + BGT uv_row_loop + +exit: + LDMFD sp!,{r4-r12, pc} + + + + + + |