mpegvideo_parser.s

来自「君正早期ucos系统(只有早期的才不没有打包成库),MPLAYER,文件系统,图」· S 代码 · 共 424 行

.file	1 "mpegvideo_parser.c"
.section .mdebug.abi32
.previous
.section	.text.mpegvideo_split,"ax",@progbits
.align	2
.align	5
.ent	mpegvideo_split
.type	mpegvideo_split, @function
mpegvideo_split:
.frame	$sp,0,$31		# vars= 0, regs= 0/0, args= 0, gp= 0
.mask	0x00000000,0
.fmask	0x00000000,0
.set	noreorder
.set	nomacro

blez	$6,$L2
move	$7,$0

li	$3,-1			# 0xffffffffffffffff
li	$8,435			# 0x1b3
li	$9,437			# 0x1b5
$L4:
addu	$2,$5,$7
lbu	$4,0($2)
sll	$3,$3,8
or	$3,$3,$4
beq	$3,$8,$L5
nop

beq	$3,$9,$L5
sltu	$2,$3,512

beq	$2,$0,$L5
sltu	$4,$3,256

beq	$4,$0,$L14
nop

$L5:
addiu	$7,$7,1
bne	$6,$7,$L4
nop

$L2:
j	$31
move	$2,$0

$L14:
j	$31
addiu	$2,$7,-3

.set	macro
.set	reorder
.end	mpegvideo_split
.section	.text.mpegvideo_parse,"ax",@progbits
.align	2
.align	5
.ent	mpegvideo_parse
.type	mpegvideo_parse, @function
mpegvideo_parse:
.frame	$sp,64,$31		# vars= 8, regs= 10/0, args= 16, gp= 0
.mask	0xc0ff0000,-4
.fmask	0x00000000,0
.set	noreorder
.set	nomacro

addiu	$sp,$sp,-64
sw	$22,48($sp)
sw	$21,44($sp)
sw	$31,60($sp)
sw	$fp,56($sp)
sw	$23,52($sp)
sw	$20,40($sp)
sw	$19,36($sp)
sw	$18,32($sp)
sw	$17,28($sp)
sw	$16,24($sp)
lw	$2,176($4)
move	$22,$4
andi	$2,$2,0x1
move	$21,$5
sw	$6,72($sp)
sw	$7,76($sp)
beq	$2,$0,$L16
lw	$19,0($4)

lw	$23,84($sp)
move	$4,$23
$L18:
lw	$3,80($sp)
sw	$0,36($22)
addu	$18,$3,$4
sltu	$2,$3,$18
beq	$2,$0,$L21
move	$17,$3

addiu	$fp,$sp,16
j	$L23
li	$20,-1			# 0xffffffffffffffff

$L52:
beq	$3,$2,$L51
slt	$2,$4,2

addiu	$2,$3,-257
$L55:
sltu	$2,$2,175
bne	$2,$0,$L54
lw	$4,84($sp)

$L29:
sltu	$2,$17,$18
$L56:
beq	$2,$0,$L54
lw	$4,84($sp)

$L23:
move	$4,$17
move	$5,$18
move	$6,$fp
jal	ff_find_start_code
sw	$20,16($sp)

lw	$3,16($sp)
move	$17,$2
subu	$4,$18,$2
li	$2,435			# 0x1b3
beq	$3,$2,$L26
sltu	$2,$3,436

bne	$2,$0,$L52
li	$2,256			# 0x100

li	$2,437			# 0x1b5
beq	$3,$2,$L27
nop

bne	$3,$20,$L55
addiu	$2,$3,-257

lw	$4,84($sp)
$L54:
lw	$3,80($sp)
$L21:
lw	$2,72($sp)
sw	$3,0($2)
lw	$2,76($sp)
sw	$4,0($2)
$L20:
move	$2,$23
lw	$31,60($sp)
lw	$fp,56($sp)
lw	$23,52($sp)
lw	$22,48($sp)
lw	$21,44($sp)
lw	$20,40($sp)
lw	$19,36($sp)
lw	$18,32($sp)
lw	$17,28($sp)
lw	$16,24($sp)
j	$31
addiu	$sp,$sp,64

$L26:
slt	$2,$4,7
bne	$2,$0,$L56
sltu	$2,$17,$18

lbu	$5,0($17)
lbu	$2,1($17)
sll	$5,$5,4
srl	$2,$2,4
or	$5,$5,$2
sw	$5,44($19)
lbu	$6,1($17)
lbu	$2,2($17)
andi	$6,$6,0xf
sll	$6,$6,8
or	$6,$6,$2
move	$4,$21
jal	avcodec_set_dimensions
sw	$6,48($19)

lbu	$3,3($17)
lui	$2,%hi(ff_frame_rate_tab)
andi	$3,$3,0xf
addiu	$2,$2,%lo(ff_frame_rate_tab)
sll	$3,$3,3
addu	$3,$3,$2
lw	$4,4($3)
lw	$5,0($3)
sw	$4,32($21)
sw	$5,36($21)
sw	$4,32($19)
sw	$5,36($19)
lbu	$2,4($17)
lbu	$3,5($17)
lbu	$4,6($17)
sll	$3,$3,2
sll	$2,$2,10
or	$2,$2,$3
srl	$4,$4,6
or	$2,$2,$4
sll	$5,$2,6
sll	$2,$2,4
addu	$2,$2,$5
sll	$3,$2,2
li	$4,1			# 0x1
addu	$2,$2,$3
sw	$2,4($21)
sw	$4,16($21)
j	$L29
sw	$4,228($21)

$L27:
blez	$4,$L29
li	$5,1			# 0x1

lbu	$2,0($17)
srl	$3,$2,4
beq	$3,$5,$L33
li	$2,8			# 0x8

bne	$3,$2,$L56
sltu	$2,$17,$18

slt	$2,$4,5
bne	$2,$0,$L56
sltu	$2,$17,$18

lbu	$4,3($17)
lbu	$3,2($17)
andi	$2,$4,0x2
beq	$2,$0,$L37
lbu	$6,4($17)

lw	$2,40($19)
beq	$2,$0,$L39
andi	$2,$6,0x80

andi	$2,$4,0x80
beq	$2,$0,$L41
li	$2,2			# 0x2

li	$2,4			# 0x4
sw	$2,36($22)
$L37:
andi	$3,$3,0x3
li	$2,3			# 0x3
beq	$3,$2,$L56
sltu	$2,$17,$18

j	$L56
sw	$20,36($22)

$L51:
bne	$2,$0,$L56
sltu	$2,$17,$18

lbu	$2,1($17)
srl	$2,$2,3
andi	$2,$2,0x7
j	$L29
sw	$2,32($22)

$L16:
lui	$3,%hi(ff_mpeg1_find_frame_end_funcp)
lw	$6,84($sp)
lw	$5,80($sp)
lw	$2,%lo(ff_mpeg1_find_frame_end_funcp)($3)
jal	$2
move	$4,$19

move	$5,$2
move	$4,$19
addiu	$6,$sp,80
addiu	$7,$sp,84
jal	ff_combine_frame
move	$23,$2

bltz	$2,$L53
lw	$4,84($sp)

j	$L18
lw	$19,0($22)

$L33:
slt	$2,$4,6
bne	$2,$0,$L56
sltu	$2,$17,$18

lbu	$4,1($17)
lbu	$5,2($17)
andi	$3,$4,0x8
lbu	$16,5($17)
lbu	$7,3($17)
sw	$3,40($19)
lbu	$2,5($17)
andi	$4,$4,0x1
srl	$2,$2,7
sltu	$2,$2,1
sw	$2,268($21)
srl	$3,$5,7
andi	$2,$5,0x1f
sll	$4,$4,1
lw	$6,48($19)
or	$4,$4,$3
srl	$7,$7,1
lw	$3,44($19)
sll	$2,$2,7
sll	$5,$5,7
or	$2,$2,$7
sll	$4,$4,12
andi	$5,$5,0x3000
or	$3,$3,$4
or	$6,$6,$5
sll	$4,$2,24
sll	$2,$2,22
sw	$3,44($19)
sw	$6,48($19)
addu	$2,$2,$4
lw	$3,4($21)
sll	$4,$2,2
addu	$2,$2,$4
addu	$3,$3,$2
sw	$3,4($21)
lw	$5,44($19)
lw	$6,48($19)
jal	avcodec_set_dimensions
move	$4,$21

srl	$2,$16,5
lw	$3,36($19)
lw	$4,32($19)
andi	$2,$2,0x3
andi	$16,$16,0x1f
addiu	$2,$2,1
addiu	$16,$16,1
mul	$3,$3,$2
mul	$4,$4,$16
li	$2,2			# 0x2
sw	$3,36($21)
sw	$4,32($21)
sw	$2,16($21)
j	$L29
sw	$2,228($21)

$L53:
lw	$2,72($sp)
lw	$23,84($sp)
sw	$0,0($2)
lw	$2,76($sp)
j	$L20
sw	$0,0($2)

$L39:
beq	$2,$0,$L37
nop

j	$L37
sw	$5,36($22)

$L41:
j	$L37
sw	$2,36($22)

.set	macro
.set	reorder
.end	mpegvideo_parse
.globl	ff_frame_rate_tab
.rdata
.align	2
.type	ff_frame_rate_tab, @object
.size	ff_frame_rate_tab, 120
ff_frame_rate_tab:
.word	0
.word	0
.word	24000
.word	1001
.word	24
.word	1
.word	25
.word	1
.word	30000
.word	1001
.word	30
.word	1
.word	50
.word	1
.word	60000
.word	1001
.word	60
.word	1
.word	15
.word	1
.word	5
.word	1
.word	10
.word	1
.word	12
.word	1
.word	15
.word	1
.word	0
.word	0
.globl	mpegvideo_parser
.data
.align	2
.type	mpegvideo_parser, @object
.size	mpegvideo_parser, 44
mpegvideo_parser:
.word	1
.word	2
.space	12
.word	60
.word	0
.word	mpegvideo_parse
.word	ff_parse1_close
.word	mpegvideo_split
.space	4

.comm	ff_mpeg1_find_frame_end_funcp,4,4
.ident	"GCC: (GNU) 4.1.2"