3f8349467a
Change-Id: Ic7782707afed38c3ec7e996a4a11dc2d55226691
472 lines
16 KiB
NASM
472 lines
16 KiB
NASM
;
|
|
; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
|
|
;
|
|
; Use of this source code is governed by a BSD-style license
|
|
; that can be found in the LICENSE file in the root of the source
|
|
; tree. An additional intellectual property rights grant can be found
|
|
; in the file PATENTS. All contributing project authors may
|
|
; be found in the AUTHORS file in the root of the source tree.
|
|
;
|
|
|
|
|
|
EXPORT |vp8cx_pack_tokens_into_partitions_armv5|
|
|
IMPORT |vp8_validate_buffer_arm|
|
|
|
|
INCLUDE asm_enc_offsets.asm
|
|
|
|
ARM
|
|
REQUIRE8
|
|
PRESERVE8
|
|
|
|
AREA |.text|, CODE, READONLY
|
|
|
|
; macro for validating write buffer position
|
|
; needs vp8_writer in r0
|
|
; start shall not be in r1
|
|
MACRO
|
|
VALIDATE_POS $start, $pos
|
|
push {r0-r3, r12, lr} ; rest of regs are preserved by subroutine call
|
|
ldr r2, [r0, #vp8_writer_buffer_end]
|
|
ldr r3, [r0, #vp8_writer_error]
|
|
mov r1, $pos
|
|
mov r0, $start
|
|
bl vp8_validate_buffer_arm
|
|
pop {r0-r3, r12, lr}
|
|
MEND
|
|
|
|
; r0 VP8_COMP *cpi
|
|
; r1 unsigned char *cx_data
|
|
; r2 const unsigned char *cx_data_end
|
|
; r3 int num_part
|
|
; s0 vp8_coef_encodings
|
|
; s1 vp8_extra_bits,
|
|
; s2 const vp8_tree_index *
|
|
|
|
|vp8cx_pack_tokens_into_partitions_armv5| PROC
|
|
push {r4-r12, lr}
|
|
sub sp, sp, #40
|
|
|
|
; Compute address of cpi->common.mb_rows
|
|
ldr r4, _VP8_COMP_common_
|
|
ldr r6, _VP8_COMMON_MBrows_
|
|
add r4, r0, r4
|
|
|
|
ldr r5, [r4, r6] ; load up mb_rows
|
|
|
|
str r5, [sp, #36] ; save mb_rows
|
|
str r1, [sp, #24] ; save ptr = cx_data
|
|
str r3, [sp, #20] ; save num_part
|
|
str r2, [sp, #8] ; save cx_data_end
|
|
|
|
ldr r4, _VP8_COMP_tplist_
|
|
add r4, r0, r4
|
|
ldr r7, [r4, #0] ; dereference cpi->tp_list
|
|
str r7, [sp, #32] ; store start of cpi->tp_list
|
|
|
|
ldr r11, _VP8_COMP_bc_ ; load up vp8_writer out of cpi
|
|
add r0, r0, r11
|
|
|
|
mov r11, #0
|
|
str r11, [sp, #28] ; i
|
|
|
|
numparts_loop
|
|
ldr r2, _vp8_writer_sz_ ; load up sizeof(vp8_writer)
|
|
add r0, r2 ; bc[i + 1]
|
|
|
|
ldr r10, [sp, #24] ; ptr
|
|
ldr r5, [sp, #36] ; move mb_rows to the counting section
|
|
subs r5, r5, r11 ; move start point with each partition
|
|
; mb_rows starts at i
|
|
str r5, [sp, #12]
|
|
|
|
; Reset all of the VP8 Writer data for each partition that
|
|
; is processed.
|
|
; start_encode
|
|
|
|
ldr r3, [sp, #8]
|
|
str r3, [r0, #vp8_writer_buffer_end]
|
|
|
|
mov r2, #0 ; vp8_writer_lowvalue
|
|
mov r5, #255 ; vp8_writer_range
|
|
mvn r3, #23 ; vp8_writer_count
|
|
|
|
str r2, [r0, #vp8_writer_pos]
|
|
str r10, [r0, #vp8_writer_buffer]
|
|
|
|
ble end_partition ; if (mb_rows <= 0) end partition
|
|
|
|
mb_row_loop
|
|
|
|
ldr r1, [r7, #tokenlist_start]
|
|
ldr r9, [r7, #tokenlist_stop]
|
|
str r9, [sp, #0] ; save stop for later comparison
|
|
str r7, [sp, #16] ; tokenlist address for next time
|
|
|
|
b check_p_lt_stop
|
|
|
|
; actual work gets done here!
|
|
|
|
while_p_lt_stop
|
|
ldrb r6, [r1, #tokenextra_token] ; t
|
|
ldr r4, [sp, #80] ; vp8_coef_encodings
|
|
mov lr, #0
|
|
add r4, r4, r6, lsl #3 ; a = vp8_coef_encodings + t
|
|
ldr r9, [r1, #tokenextra_context_tree] ; pp
|
|
|
|
ldrb r7, [r1, #tokenextra_skip_eob_node]
|
|
|
|
ldr r6, [r4, #vp8_token_value] ; v
|
|
ldr r8, [r4, #vp8_token_len] ; n
|
|
|
|
; vp8 specific skip_eob_node
|
|
cmp r7, #0
|
|
movne lr, #2 ; i = 2
|
|
subne r8, r8, #1 ; --n
|
|
|
|
rsb r4, r8, #32 ; 32-n
|
|
ldr r10, [sp, #88] ; vp8_coef_tree
|
|
|
|
; v is kept in r12 during the token pack loop
|
|
lsl r12, r6, r4 ; r12 = v << 32 - n
|
|
|
|
; loop start
|
|
token_loop
|
|
ldrb r4, [r9, lr, asr #1] ; pp [i>>1]
|
|
sub r7, r5, #1 ; range-1
|
|
|
|
; Decisions are made based on the bit value shifted
|
|
; off of v, so set a flag here based on this.
|
|
; This value is refered to as "bb"
|
|
lsls r12, r12, #1 ; bb = v >> n
|
|
mul r6, r4, r7 ; ((range-1) * pp[i>>1]))
|
|
|
|
; bb can only be 0 or 1. So only execute this statement
|
|
; if bb == 1, otherwise it will act like i + 0
|
|
addcs lr, lr, #1 ; i + bb
|
|
|
|
mov r7, #1
|
|
ldrsb lr, [r10, lr] ; i = vp8_coef_tree[i+bb]
|
|
add r4, r7, r6, lsr #8 ; 1 + (((range-1) * pp[i>>1]) >> 8)
|
|
|
|
addcs r2, r2, r4 ; if (bb) lowvalue += split
|
|
subcs r4, r5, r4 ; if (bb) range = range-split
|
|
|
|
; Counting the leading zeros is used to normalize range.
|
|
clz r6, r4
|
|
sub r6, r6, #24 ; shift
|
|
|
|
; Flag is set on the sum of count. This flag is used later
|
|
; to determine if count >= 0
|
|
adds r3, r3, r6 ; count += shift
|
|
lsl r5, r4, r6 ; range <<= shift
|
|
bmi token_count_lt_zero ; if(count >= 0)
|
|
|
|
sub r6, r6, r3 ; offset = shift - count
|
|
sub r4, r6, #1 ; offset-1
|
|
lsls r4, r2, r4 ; if((lowvalue<<(offset-1)) & 0x80000000 )
|
|
bpl token_high_bit_not_set
|
|
|
|
ldr r4, [r0, #vp8_writer_pos] ; x
|
|
sub r4, r4, #1 ; x = w->pos-1
|
|
b token_zero_while_start
|
|
token_zero_while_loop
|
|
mov r10, #0
|
|
strb r10, [r7, r4] ; w->buffer[x] =(unsigned char)0
|
|
sub r4, r4, #1 ; x--
|
|
token_zero_while_start
|
|
cmp r4, #0
|
|
ldrge r7, [r0, #vp8_writer_buffer]
|
|
ldrb r11, [r7, r4]
|
|
cmpge r11, #0xff
|
|
beq token_zero_while_loop
|
|
|
|
ldr r7, [r0, #vp8_writer_buffer]
|
|
ldrb r10, [r7, r4] ; w->buffer[x]
|
|
add r10, r10, #1
|
|
strb r10, [r7, r4] ; w->buffer[x] + 1
|
|
token_high_bit_not_set
|
|
rsb r4, r6, #24 ; 24-offset
|
|
ldr r10, [r0, #vp8_writer_buffer]
|
|
lsr r7, r2, r4 ; lowvalue >> (24-offset)
|
|
ldr r4, [r0, #vp8_writer_pos] ; w->pos
|
|
lsl r2, r2, r6 ; lowvalue <<= offset
|
|
mov r6, r3 ; shift = count
|
|
add r11, r4, #1 ; w->pos++
|
|
bic r2, r2, #0xff000000 ; lowvalue &= 0xffffff
|
|
str r11, [r0, #vp8_writer_pos]
|
|
sub r3, r3, #8 ; count -= 8
|
|
|
|
VALIDATE_POS r10, r11 ; validate_buffer at pos
|
|
|
|
strb r7, [r10, r4] ; w->buffer[w->pos++]
|
|
|
|
; r10 is used earlier in the loop, but r10 is used as
|
|
; temp variable here. So after r10 is used, reload
|
|
; vp8_coef_tree_dcd into r10
|
|
ldr r10, [sp, #88] ; vp8_coef_tree
|
|
|
|
token_count_lt_zero
|
|
lsl r2, r2, r6 ; lowvalue <<= shift
|
|
|
|
subs r8, r8, #1 ; --n
|
|
bne token_loop
|
|
|
|
ldrb r6, [r1, #tokenextra_token] ; t
|
|
ldr r7, [sp, #84] ; vp8_extra_bits
|
|
; Add t * sizeof (vp8_extra_bit_struct) to get the desired
|
|
; element. Here vp8_extra_bit_struct == 16
|
|
add r12, r7, r6, lsl #4 ; b = vp8_extra_bits + t
|
|
|
|
ldr r4, [r12, #vp8_extra_bit_struct_base_val]
|
|
cmp r4, #0
|
|
beq skip_extra_bits
|
|
|
|
; if( b->base_val)
|
|
ldr r8, [r12, #vp8_extra_bit_struct_len] ; L
|
|
ldrsh lr, [r1, #tokenextra_extra] ; e = p->Extra
|
|
cmp r8, #0 ; if( L)
|
|
beq no_extra_bits
|
|
|
|
ldr r9, [r12, #vp8_extra_bit_struct_prob]
|
|
asr r7, lr, #1 ; v=e>>1
|
|
|
|
ldr r10, [r12, #vp8_extra_bit_struct_tree]
|
|
str r10, [sp, #4] ; b->tree
|
|
|
|
rsb r4, r8, #32
|
|
lsl r12, r7, r4
|
|
|
|
mov lr, #0 ; i = 0
|
|
|
|
extra_bits_loop
|
|
ldrb r4, [r9, lr, asr #1] ; pp[i>>1]
|
|
sub r7, r5, #1 ; range-1
|
|
lsls r12, r12, #1 ; v >> n
|
|
mul r6, r4, r7 ; (range-1) * pp[i>>1]
|
|
addcs lr, lr, #1 ; i + bb
|
|
|
|
mov r7, #1
|
|
ldrsb lr, [r10, lr] ; i = b->tree[i+bb]
|
|
add r4, r7, r6, lsr #8 ; split = 1 + (((range-1) * pp[i>>1]) >> 8)
|
|
|
|
addcs r2, r2, r4 ; if (bb) lowvalue += split
|
|
subcs r4, r5, r4 ; if (bb) range = range-split
|
|
|
|
clz r6, r4
|
|
sub r6, r6, #24
|
|
|
|
adds r3, r3, r6 ; count += shift
|
|
lsl r5, r4, r6 ; range <<= shift
|
|
bmi extra_count_lt_zero ; if(count >= 0)
|
|
|
|
sub r6, r6, r3 ; offset= shift - count
|
|
sub r4, r6, #1 ; offset-1
|
|
lsls r4, r2, r4 ; if((lowvalue<<(offset-1)) & 0x80000000 )
|
|
bpl extra_high_bit_not_set
|
|
|
|
ldr r4, [r0, #vp8_writer_pos] ; x
|
|
sub r4, r4, #1 ; x = w->pos - 1
|
|
b extra_zero_while_start
|
|
extra_zero_while_loop
|
|
mov r10, #0
|
|
strb r10, [r7, r4] ; w->buffer[x] =(unsigned char)0
|
|
sub r4, r4, #1 ; x--
|
|
extra_zero_while_start
|
|
cmp r4, #0
|
|
ldrge r7, [r0, #vp8_writer_buffer]
|
|
ldrb r11, [r7, r4]
|
|
cmpge r11, #0xff
|
|
beq extra_zero_while_loop
|
|
|
|
ldr r7, [r0, #vp8_writer_buffer]
|
|
ldrb r10, [r7, r4]
|
|
add r10, r10, #1
|
|
strb r10, [r7, r4]
|
|
extra_high_bit_not_set
|
|
rsb r4, r6, #24 ; 24-offset
|
|
ldr r10, [r0, #vp8_writer_buffer]
|
|
lsr r7, r2, r4 ; lowvalue >> (24-offset)
|
|
ldr r4, [r0, #vp8_writer_pos]
|
|
lsl r2, r2, r6 ; lowvalue <<= offset
|
|
mov r6, r3 ; shift = count
|
|
add r11, r4, #1 ; w->pos++
|
|
bic r2, r2, #0xff000000 ; lowvalue &= 0xffffff
|
|
str r11, [r0, #vp8_writer_pos]
|
|
sub r3, r3, #8 ; count -= 8
|
|
|
|
VALIDATE_POS r10, r11 ; validate_buffer at pos
|
|
|
|
strb r7, [r10, r4] ; w->buffer[w->pos++]=(lowvalue >> (24-offset))
|
|
ldr r10, [sp, #4] ; b->tree
|
|
extra_count_lt_zero
|
|
lsl r2, r2, r6
|
|
|
|
subs r8, r8, #1 ; --n
|
|
bne extra_bits_loop ; while (n)
|
|
|
|
no_extra_bits
|
|
ldr lr, [r1, #4] ; e = p->Extra
|
|
add r4, r5, #1 ; range + 1
|
|
tst lr, #1
|
|
lsr r4, r4, #1 ; split = (range + 1) >> 1
|
|
addne r2, r2, r4 ; lowvalue += split
|
|
subne r4, r5, r4 ; range = range-split
|
|
tst r2, #0x80000000 ; lowvalue & 0x80000000
|
|
lsl r5, r4, #1 ; range <<= 1
|
|
beq end_high_bit_not_set
|
|
|
|
ldr r4, [r0, #vp8_writer_pos]
|
|
mov r7, #0
|
|
sub r4, r4, #1
|
|
b end_zero_while_start
|
|
end_zero_while_loop
|
|
strb r7, [r6, r4]
|
|
sub r4, r4, #1 ; x--
|
|
end_zero_while_start
|
|
cmp r4, #0
|
|
ldrge r6, [r0, #vp8_writer_buffer]
|
|
ldrb r12, [r6, r4]
|
|
cmpge r12, #0xff
|
|
beq end_zero_while_loop
|
|
|
|
ldr r6, [r0, #vp8_writer_buffer]
|
|
ldrb r7, [r6, r4]
|
|
add r7, r7, #1
|
|
strb r7, [r6, r4]
|
|
end_high_bit_not_set
|
|
adds r3, r3, #1 ; ++count
|
|
lsl r2, r2, #1 ; lowvalue <<= 1
|
|
bne end_count_zero
|
|
|
|
ldr r4, [r0, #vp8_writer_pos]
|
|
mvn r3, #7 ; count = -8
|
|
ldr r7, [r0, #vp8_writer_buffer]
|
|
lsr r6, r2, #24 ; lowvalue >> 24
|
|
add r12, r4, #1 ; w->pos++
|
|
bic r2, r2, #0xff000000 ; lowvalue &= 0xffffff
|
|
str r12, [r0, #vp8_writer_pos]
|
|
|
|
VALIDATE_POS r7, r12 ; validate_buffer at pos
|
|
|
|
strb r6, [r7, r4]
|
|
end_count_zero
|
|
skip_extra_bits
|
|
add r1, r1, #TOKENEXTRA_SZ ; ++p
|
|
check_p_lt_stop
|
|
ldr r4, [sp, #0] ; stop
|
|
cmp r1, r4 ; while( p < stop)
|
|
bcc while_p_lt_stop
|
|
|
|
ldr r10, [sp, #20] ; num_parts
|
|
mov r1, #TOKENLIST_SZ
|
|
mul r1, r10, r1
|
|
|
|
ldr r6, [sp, #12] ; mb_rows
|
|
ldr r7, [sp, #16] ; tokenlist address
|
|
subs r6, r6, r10
|
|
add r7, r7, r1 ; next element in the array
|
|
str r6, [sp, #12]
|
|
bgt mb_row_loop
|
|
|
|
end_partition
|
|
mov r12, #32
|
|
|
|
stop_encode_loop
|
|
sub r7, r5, #1 ; range-1
|
|
|
|
mov r4, r7, lsl #7 ; ((range-1) * 128)
|
|
|
|
mov r7, #1
|
|
add r4, r7, r4, lsr #8 ; 1 + (((range-1) * 128) >> 8)
|
|
|
|
; Counting the leading zeros is used to normalize range.
|
|
clz r6, r4
|
|
sub r6, r6, #24 ; shift
|
|
|
|
; Flag is set on the sum of count. This flag is used later
|
|
; to determine if count >= 0
|
|
adds r3, r3, r6 ; count += shift
|
|
lsl r5, r4, r6 ; range <<= shift
|
|
bmi token_count_lt_zero_se ; if(count >= 0)
|
|
|
|
sub r6, r6, r3 ; offset = shift - count
|
|
sub r4, r6, #1 ; offset-1
|
|
lsls r4, r2, r4 ; if((lowvalue<<(offset-1)) & 0x80000000 )
|
|
bpl token_high_bit_not_set_se
|
|
|
|
ldr r4, [r0, #vp8_writer_pos] ; x
|
|
sub r4, r4, #1 ; x = w->pos-1
|
|
b token_zero_while_start_se
|
|
token_zero_while_loop_se
|
|
mov r10, #0
|
|
strb r10, [r7, r4] ; w->buffer[x] =(unsigned char)0
|
|
sub r4, r4, #1 ; x--
|
|
token_zero_while_start_se
|
|
cmp r4, #0
|
|
ldrge r7, [r0, #vp8_writer_buffer]
|
|
ldrb r11, [r7, r4]
|
|
cmpge r11, #0xff
|
|
beq token_zero_while_loop_se
|
|
|
|
ldr r7, [r0, #vp8_writer_buffer]
|
|
ldrb r10, [r7, r4] ; w->buffer[x]
|
|
add r10, r10, #1
|
|
strb r10, [r7, r4] ; w->buffer[x] + 1
|
|
token_high_bit_not_set_se
|
|
rsb r4, r6, #24 ; 24-offset
|
|
ldr r10, [r0, #vp8_writer_buffer]
|
|
lsr r7, r2, r4 ; lowvalue >> (24-offset)
|
|
ldr r4, [r0, #vp8_writer_pos] ; w->pos
|
|
lsl r2, r2, r6 ; lowvalue <<= offset
|
|
mov r6, r3 ; shift = count
|
|
add r11, r4, #1 ; w->pos++
|
|
bic r2, r2, #0xff000000 ; lowvalue &= 0xffffff
|
|
str r11, [r0, #vp8_writer_pos]
|
|
sub r3, r3, #8 ; count -= 8
|
|
|
|
VALIDATE_POS r10, r11 ; validate_buffer at pos
|
|
|
|
strb r7, [r10, r4] ; w->buffer[w->pos++]
|
|
|
|
token_count_lt_zero_se
|
|
lsl r2, r2, r6 ; lowvalue <<= shift
|
|
|
|
subs r12, r12, #1
|
|
bne stop_encode_loop
|
|
|
|
ldr r4, [r0, #vp8_writer_pos] ; w->pos
|
|
ldr r12, [sp, #24] ; ptr
|
|
add r12, r12, r4 ; ptr += w->pos
|
|
str r12, [sp, #24]
|
|
|
|
ldr r11, [sp, #28] ; i
|
|
ldr r10, [sp, #20] ; num_parts
|
|
|
|
add r11, r11, #1 ; i++
|
|
str r11, [sp, #28]
|
|
|
|
ldr r7, [sp, #32] ; cpi->tp_list[i]
|
|
mov r1, #TOKENLIST_SZ
|
|
add r7, r7, r1 ; next element in cpi->tp_list
|
|
str r7, [sp, #32] ; cpi->tp_list[i+1]
|
|
|
|
cmp r10, r11
|
|
bgt numparts_loop
|
|
|
|
add sp, sp, #40
|
|
pop {r4-r12, pc}
|
|
ENDP
|
|
|
|
_VP8_COMP_common_
|
|
DCD vp8_comp_common
|
|
_VP8_COMMON_MBrows_
|
|
DCD vp8_common_mb_rows
|
|
_VP8_COMP_tplist_
|
|
DCD vp8_comp_tplist
|
|
_VP8_COMP_bc_
|
|
DCD vp8_comp_bc
|
|
_vp8_writer_sz_
|
|
DCD vp8_writer_sz
|
|
|
|
END
|