diff options
Diffstat (limited to 'ffmpeg/libavcodec/arm/vp8_armv6.S')
| -rw-r--r-- | ffmpeg/libavcodec/arm/vp8_armv6.S | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/ffmpeg/libavcodec/arm/vp8_armv6.S b/ffmpeg/libavcodec/arm/vp8_armv6.S new file mode 100644 index 0000000..e7d25a4 --- /dev/null +++ b/ffmpeg/libavcodec/arm/vp8_armv6.S @@ -0,0 +1,248 @@ +/* + * Copyright (C) 2010 Mans Rullgard + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "libavutil/arm/asm.S" + +.macro rac_get_prob h, bs, buf, cw, pr, t0, t1 + adds \bs, \bs, \t0 + lsl \cw, \cw, \t0 + lsl \t0, \h, \t0 + rsb \h, \pr, #256 + it cs + ldrhcs \t1, [\buf], #2 + smlabb \h, \t0, \pr, \h +T itttt cs + rev16cs \t1, \t1 +A orrcs \cw, \cw, \t1, lsl \bs +T lslcs \t1, \t1, \bs +T orrcs \cw, \cw, \t1 + subcs \bs, \bs, #16 + lsr \h, \h, #8 + cmp \cw, \h, lsl #16 + itt ge + subge \cw, \cw, \h, lsl #16 + subge \h, \t0, \h +.endm + +.macro rac_get_128 h, bs, buf, cw, t0, t1 + adds \bs, \bs, \t0 + lsl \cw, \cw, \t0 + lsl \t0, \h, \t0 + it cs + ldrhcs \t1, [\buf], #2 + mov \h, #128 + it cs + rev16cs \t1, \t1 + add \h, \h, \t0, lsl #7 +A orrcs \cw, \cw, \t1, lsl \bs +T ittt cs +T lslcs \t1, \t1, \bs +T orrcs \cw, \cw, \t1 + subcs \bs, \bs, #16 + lsr \h, \h, #8 + cmp \cw, \h, lsl #16 + itt ge + subge \cw, \cw, \h, lsl #16 + subge \h, \t0, \h +.endm + +function ff_decode_block_coeffs_armv6, export=1 + push {r0,r1,r4-r11,lr} + movrelx lr, X(ff_vp56_norm_shift) + ldrd r4, r5, [sp, #44] @ token_prob, qmul + cmp r3, #0 + ldr r11, [r5] + ldm r0, {r5-r7} @ high, bits, buf + it ne + pkhtbne r11, r11, r11, asr #16 + ldr r8, [r0, #16] @ code_word +0: + ldrb r9, [lr, r5] + add r3, r3, #1 + ldrb r0, [r4, #1] + rac_get_prob r5, r6, r7, r8, r0, r9, r10 + blt 2f + + ldrb r9, [lr, r5] + ldrb r0, [r4, #2] + rac_get_prob r5, r6, r7, r8, r0, r9, r10 + ldrb r9, [lr, r5] + bge 3f + + add r4, r3, r3, lsl #5 + sxth r12, r11 + add r4, r4, r2 + adds r6, r6, r9 + add r4, r4, #11 + lsl r8, r8, r9 + it cs + ldrhcs r10, [r7], #2 + lsl r9, r5, r9 + mov r5, #128 + it cs + rev16cs r10, r10 + add r5, r5, r9, lsl #7 +T ittt cs +T lslcs r10, r10, r6 +T orrcs r8, r8, r10 +A orrcs r8, r8, r10, lsl r6 + subcs r6, r6, #16 + lsr r5, r5, #8 + cmp r8, r5, lsl #16 + movrel r10, zigzag_scan-1 + itt ge + subge r8, r8, r5, lsl #16 + subge r5, r9, r5 + ldrb r10, [r10, r3] + it ge + rsbge r12, r12, #0 + cmp r3, #16 + strh r12, [r1, r10] + bge 6f +5: + ldrb r9, [lr, r5] + ldrb r0, [r4] + rac_get_prob r5, r6, r7, r8, r0, r9, r10 + pkhtb r11, r11, r11, asr #16 + bge 0b + +6: + ldr r0, [sp] + ldr r9, [r0, #12] + cmp r7, r9 + it hi + movhi r7, r9 + stm r0, {r5-r7} @ high, bits, buf + str r8, [r0, #16] @ code_word + + add sp, sp, #8 + mov r0, r3 + pop {r4-r11,pc} +2: + add r4, r3, r3, lsl #5 + cmp r3, #16 + add r4, r4, r2 + pkhtb r11, r11, r11, asr #16 + bne 0b + b 6b +3: + ldrb r0, [r4, #3] + rac_get_prob r5, r6, r7, r8, r0, r9, r10 + ldrb r9, [lr, r5] + bge 1f + + mov r12, #2 + ldrb r0, [r4, #4] + rac_get_prob r5, r6, r7, r8, r0, r9, r10 + it ge + addge r12, #1 + ldrb r9, [lr, r5] + blt 4f + ldrb r0, [r4, #5] + rac_get_prob r5, r6, r7, r8, r0, r9, r10 + it ge + addge r12, #1 + ldrb r9, [lr, r5] + b 4f +1: + ldrb r0, [r4, #6] + rac_get_prob r5, r6, r7, r8, r0, r9, r10 + ldrb r9, [lr, r5] + bge 3f + + ldrb r0, [r4, #7] + rac_get_prob r5, r6, r7, r8, r0, r9, r10 + ldrb r9, [lr, r5] + bge 2f + + mov r12, #5 + mov r0, #159 + rac_get_prob r5, r6, r7, r8, r0, r9, r10 + it ge + addge r12, r12, #1 + ldrb r9, [lr, r5] + b 4f +2: + mov r12, #7 + mov r0, #165 + rac_get_prob r5, r6, r7, r8, r0, r9, r10 + it ge + addge r12, r12, #2 + ldrb r9, [lr, r5] + mov r0, #145 + rac_get_prob r5, r6, r7, r8, r0, r9, r10 + it ge + addge r12, r12, #1 + ldrb r9, [lr, r5] + b 4f +3: + ldrb r0, [r4, #8] + rac_get_prob r5, r6, r7, r8, r0, r9, r10 + it ge + addge r4, r4, #1 + ldrb r9, [lr, r5] + ite ge + movge r12, #2 + movlt r12, #0 + ldrb r0, [r4, #9] + rac_get_prob r5, r6, r7, r8, r0, r9, r10 + mov r9, #8 + it ge + addge r12, r12, #1 + movrelx r4, X(ff_vp8_dct_cat_prob), r1 + lsl r9, r9, r12 + ldr r4, [r4, r12, lsl #2] + add r12, r9, #3 + mov r1, #0 + ldrb r0, [r4], #1 +1: + ldrb r9, [lr, r5] + lsl r1, r1, #1 + rac_get_prob r5, r6, r7, r8, r0, r9, r10 + ldrb r0, [r4], #1 + it ge + addge r1, r1, #1 + cmp r0, #0 + bne 1b + ldrb r9, [lr, r5] + add r12, r12, r1 + ldr r1, [sp, #4] +4: + add r4, r3, r3, lsl #5 + add r4, r4, r2 + add r4, r4, #22 + rac_get_128 r5, r6, r7, r8, r9, r10 + it ge + rsbge r12, r12, #0 + smulbb r12, r12, r11 + movrel r9, zigzag_scan-1 + ldrb r9, [r9, r3] + cmp r3, #16 + strh r12, [r1, r9] + bge 6b + b 5b +endfunc + +const zigzag_scan + .byte 0, 2, 8, 16 + .byte 10, 4, 6, 12 + .byte 18, 24, 26, 20 + .byte 14, 22, 28, 30 +endconst |