vocdec.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 401 行

.file	1 "vocdec.c"
.section .mdebug.abi32
.previous
.section	.rodata.str1.4,"aMS",@progbits,1
.align	2
$LC0:
.ascii	"unknown header size: %d\012\000"
.section	.text.voc_read_header,"ax",@progbits
.align	2
.align	5
.ent	voc_read_header
.type	voc_read_header, @function
voc_read_header:
.frame	$sp,32,$31		# vars= 0, regs= 4/0, args= 16, gp= 0
.mask	0x80070000,-4
.fmask	0x00000000,0
.set	noreorder
.set	nomacro

addiu	$sp,$sp,-32
sw	$16,16($sp)
addiu	$16,$4,16
sw	$31,28($sp)
sw	$17,20($sp)
li	$6,20			# 0x14
move	$7,$0
sw	$18,24($sp)
move	$17,$4
move	$4,$16
jal	url_fskip
lw	$18,12($17)

jal	get_le16
move	$4,$16

addiu	$3,$2,-22
li	$2,4			# 0x4
move	$4,$16
li	$6,4			# 0x4
move	$7,$0
beq	$3,$2,$L2
move	$5,$0

lui	$6,%hi($LC0)
move	$4,$17
addiu	$6,$6,%lo($LC0)
jal	av_log
move	$7,$3

li	$2,-89			# 0xffffffffffffffa7
$L4:
lw	$31,28($sp)
lw	$18,24($sp)
lw	$17,20($sp)
lw	$16,16($sp)
j	$31
addiu	$sp,$sp,32

$L2:
jal	url_fskip
nop

move	$4,$17
jal	av_new_stream
move	$5,$0

move	$3,$2
beq	$3,$0,$L4
li	$2,-12			# 0xfffffffffffffff4

lw	$3,8($3)
li	$2,1			# 0x1
sw	$2,224($3)
sw	$0,0($18)
lw	$31,28($sp)
lw	$18,24($sp)
lw	$17,20($sp)
lw	$16,16($sp)
move	$2,$0
j	$31
addiu	$sp,$sp,32

.set	macro
.set	reorder
.end	voc_read_header
.section	.text.voc_probe,"ax",@progbits
.align	2
.align	5
.ent	voc_probe
.type	voc_probe, @function
voc_probe:
.frame	$sp,24,$31		# vars= 0, regs= 2/0, args= 16, gp= 0
.mask	0x80010000,-4
.fmask	0x00000000,0
.set	noreorder
.set	nomacro

addiu	$sp,$sp,-24
sw	$31,20($sp)
sw	$16,16($sp)
lw	$16,4($4)
lui	$5,%hi(voc_magic)
move	$4,$16
addiu	$5,$5,%lo(voc_magic)
jal	memcmp
li	$6,20			# 0x14

bne	$2,$0,$L12
move	$4,$0

lbu	$2,23($16)
lbu	$4,22($16)
sll	$2,$2,8
lbu	$3,25($16)
or	$2,$2,$4
lbu	$5,24($16)
sll	$3,$3,8
nor	$2,$0,$2
addiu	$2,$2,4660
or	$3,$3,$5
xor	$3,$3,$2
li	$4,10			# 0xa
li	$2,100			# 0x64
movz	$4,$2,$3
$L12:
lw	$31,20($sp)
lw	$16,16($sp)
move	$2,$4
j	$31
addiu	$sp,$sp,24

.set	macro
.set	reorder
.end	voc_probe
.section	.text.voc_get_packet,"ax",@progbits
.align	2
.align	5
.globl	voc_get_packet
.ent	voc_get_packet
.type	voc_get_packet, @function
voc_get_packet:
.frame	$sp,56,$31		# vars= 0, regs= 9/0, args= 16, gp= 0
.mask	0x80ff0000,-8
.fmask	0x00000000,0
.set	noreorder
.set	nomacro

addiu	$sp,$sp,-56
sw	$23,44($sp)
sw	$22,40($sp)
sw	$21,36($sp)
sw	$18,24($sp)
sw	$17,20($sp)
sw	$31,48($sp)
sw	$20,32($sp)
sw	$19,28($sp)
sw	$16,16($sp)
lw	$19,12($4)
lw	$20,8($6)
lw	$3,0($19)
move	$23,$5
move	$17,$7
addiu	$18,$4,16
move	$21,$0
li	$22,1			# 0x1
$L41:
bne	$3,$0,$L42
nop

$L39:
jal	get_byte
move	$4,$18

move	$16,$2
beq	$2,$0,$L33
move	$4,$18

$L44:
jal	get_le24
addiu	$17,$17,-4

move	$3,$2
sw	$2,0($19)
li	$2,2			# 0x2
move	$4,$18
beq	$16,$2,$L41
sltu	$5,$16,3

beq	$5,$0,$L26
li	$2,8			# 0x8

li	$2,1			# 0x1
beq	$16,$2,$L43
move	$6,$3

$L45:
jal	url_fskip
sra	$7,$3,31

lw	$3,0($19)
move	$4,$18
sw	$0,0($19)
jal	get_byte
subu	$17,$17,$3

move	$16,$2
bne	$2,$0,$L44
move	$4,$18

$L33:
lw	$31,48($sp)
lw	$23,44($sp)
lw	$22,40($sp)
lw	$21,36($sp)
lw	$20,32($sp)
lw	$19,28($sp)
lw	$18,24($sp)
lw	$17,20($sp)
lw	$16,16($sp)
li	$2,-5			# 0xfffffffffffffffb
j	$31
addiu	$sp,$sp,56

$L26:
beq	$16,$2,$L24
li	$2,9			# 0x9

bne	$16,$2,$L45
move	$6,$3

jal	get_le32
move	$4,$18

sw	$2,64($20)
jal	get_byte
move	$4,$18

sw	$2,392($20)
jal	get_byte
move	$4,$18

sw	$2,68($20)
jal	get_le16
move	$4,$18

lui	$4,%hi(voc_codec_tags)
addiu	$4,$4,%lo(voc_codec_tags)
jal	codec_get_id
move	$5,$2

sw	$2,228($20)
move	$4,$18
li	$6,4			# 0x4
jal	url_fskip
move	$7,$0

lw	$3,0($19)
addiu	$17,$17,-12
addiu	$3,$3,-12
beq	$3,$0,$L39
sw	$3,0($19)

$L42:
lw	$3,392($20)
lw	$2,64($20)
slt	$5,$0,$17
mul	$2,$2,$3
sw	$2,4($20)
lw	$3,0($19)
li	$2,2048			# 0x800
movz	$17,$2,$5
slt	$4,$3,$17
move	$6,$3
movz	$6,$17,$4
subu	$3,$3,$6
sw	$3,0($19)
move	$4,$18
move	$5,$23
lw	$31,48($sp)
lw	$23,44($sp)
lw	$22,40($sp)
lw	$21,36($sp)
lw	$20,32($sp)
lw	$19,28($sp)
lw	$18,24($sp)
lw	$17,20($sp)
lw	$16,16($sp)
j	av_get_packet
addiu	$sp,$sp,56

$L24:
jal	get_le16
move	$4,$18

move	$4,$18
jal	get_byte
move	$16,$2

jal	get_byte
move	$4,$18

li	$3,65536			# 0x10000
addiu	$22,$2,1
subu	$3,$3,$16
mul	$3,$22,$3
li	$2,255983616			# 0xf420000
ori	$2,$2,0x4000
div	$0,$2,$3
teq	$3,$0,7
addiu	$17,$17,-4
move	$3,$0
sw	$0,0($19)
j	$L41
mflo	$21

$L43:
jal	get_byte
move	$4,$18

li	$3,256			# 0x100
subu	$3,$3,$2
li	$2,983040			# 0xf0000
ori	$2,$2,0x4240
div	$0,$2,$3
teq	$3,$0,7
sw	$22,68($20)
move	$4,$18
addiu	$17,$17,-2
li	$22,1			# 0x1
mflo	$2
movn	$2,$21,$21
jal	get_byte
sw	$2,64($20)

lui	$4,%hi(voc_codec_tags)
addiu	$4,$4,%lo(voc_codec_tags)
jal	codec_get_id
move	$5,$2

sw	$2,228($20)
jal	av_get_bits_per_sample
move	$4,$2

sw	$2,392($20)
lw	$3,0($19)
addiu	$3,$3,-2
j	$L41
sw	$3,0($19)

.set	macro
.set	reorder
.end	voc_get_packet
.section	.text.voc_read_packet,"ax",@progbits
.align	2
.align	5
.ent	voc_read_packet
.type	voc_read_packet, @function
voc_read_packet:
.frame	$sp,0,$31		# vars= 0, regs= 0/0, args= 0, gp= 0
.mask	0x00000000,0
.fmask	0x00000000,0
.set	noreorder
.set	nomacro

lw	$6,100($4)
j	voc_get_packet
move	$7,$0

.set	macro
.set	reorder
.end	voc_read_packet
.globl	voc_demuxer
.section	.rodata.str1.4
.align	2
$LC1:
.ascii	"voc\000"
.align	2
$LC2:
.ascii	"Creative Voice File format\000"
.data
.align	2
.type	voc_demuxer, @object
.size	voc_demuxer, 64
voc_demuxer:
.word	$LC1
.word	$LC2
.word	4
.word	voc_probe
.word	voc_read_header
.word	voc_read_packet
.space	32
.word	__compound_literal.0
.space	4
.align	2
.type	__compound_literal.0, @object
.size	__compound_literal.0, 8
__compound_literal.0:
.word	voc_codec_tags
.word	0
.ident	"GCC: (GNU) 4.1.2"