/*
* Based on LuaFileSystem : http://www.keplerproject.org/luafilesystem
*
* Copyright © 2003 Kepler Project.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
*/
#include "plugin.h"
#include "rocklibc.h"
#include "lauxlib.h"
#include "luadir.h"
#define DIR_METATABLE "directory metatable"
typedef struct dir_data {
int closed;
DIR *dir;
} dir_data;
static int make_dir (lua_State *L) {
const char *path = luaL_checkstring (L, 1);
lua_pushboolean (L, !rb->mkdir(path));
return 1;
}
static int remove_dir (lua_State *L) {
const char *path = luaL_checkstring (L, 1);
lua_pushboolean (L, !rb->rmdir (path));
return 1;
}
/*
** Directory iterator
*/
static int dir_iter (lua_State *L) {
struct dirent *entry;
dir_data *d = (dir_data *)luaL_checkudata (L, 1, DIR_METATABLE);
luaL_argcheck (L, !d->closed, 1, "closed directory");
if ((entry = rb->readdir (d->dir)) != NULL) {
struct dirinfo info = rb->dir_get_info(d->dir, entry);
lua_pushstring (L, entry->d_name);
lua_pushboolean (L, info.attribute & ATTR_DIRECTORY);
return 2;
} else {
/* no more entries => close directory */
rb->closedir (d->dir);
d->closed = 1;
return 0;
}
}
/*
** Closes directory iterators
*/
static int dir_close (lua_State *L) {
dir_data *d = (dir_data *)lua_touserdata (L, 1);
if (!d->closed && d->dir) {
rb->closedir (d->dir);
d->closed = 1;
}
return 0;
}
/*
** Factory of directory iterators
*/
static int dir_iter_factory (lua_State *L) {
const char *path = luaL_checkstring (L, 1);
dir_data *d;
lua_pushcfunction (L, dir_iter);
d = (dir_data *) lua_newuserdata (L, sizeof(dir_data));
d->closed = 0;
luaL_getmetatable (L, DIR_METATABLE);
lua_setmetatable (L, -2);
d->dir = rb->opendir (path);
if (d->dir == NULL)
luaL_error (L, "cannot open %s: %d", path, errno);
return 2;
}
/*
** Creates directory metatable.
*/
static int dir_create_meta (lua_State *L) {
luaL_newmetatable (L, DIR_METATABLE);
/* set its __gc field */
lua_pushstring (L, "__index");
lua_newtable(L);
lua_pushstring (L, "next");
lua_pushcfunction (L, dir_iter);
lua_settable(L, -3);
lua_pushstring (L, "close");
lua_pushcfunction (L, dir_close);
lua_settable(L, -3);
lua_settable (L, -3);
lua_pushstring (L, "__gc");
lua_pushcfunction (L, dir_close);
lua_settable (L, -3);
return 1;
}
static const struct luaL_reg fslib[] = {
{"dir", dir_iter_factory},
{"mkdir", make_dir},
{"rmdir", remove_dir},
{NULL, NULL},
};
int luaopen_luadir (lua_State *L) {
dir_create_meta (L);
luaL_register (L, LUA_DIRLIBNAME, fslib);
return 1;
}
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2007 by Michael Sevakis
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
.global mpeg2_idct_copy
.type mpeg2_idct_copy, %function
.global mpeg2_idct_add
.type mpeg2_idct_add, %function
/* Custom calling convention:
* r0 contains block pointer and is non-volatile
* all non-volatile c context saved and restored on its behalf
*/
.idct:
add r12, r0, #128
1:
ldrsh r1, [r0, #0] /* d0 */
ldrsh r2, [r0, #2] /* d1 */
ldrsh r3, [r0, #4] /* d2 */
ldrsh r4, [r0, #6] /* d3 */
ldrsh r5, [r0, #8] /* d0 */
ldrsh r6, [r0, #10] /* d1 */
ldrsh r7, [r0, #12] /* d2 */
ldrsh r8, [r0, #14] /* d3 */
orrs r9, r2, r3
orreqs r9, r4, r5
orreqs r9, r6, r7
cmpeq r8, #0
bne 2f
mov r1, r1, asl #15
bic r1, r1, #0x8000
orr r1, r1, r1, lsr #16
str r1, [r0], #4
str r1, [r0], #4
str r1, [r0], #4
str r1, [r0], #4
cmp r0, r12
blo 1b
b 3f
2:
mov r1, r1, asl #11 /* r1 = d0 = (block[0] << 11) + 2048 */
add r1, r1, #2048
add r1, r1, r3, asl #11 /* r1 = t0 = d0 + (block[2] << 11) */
sub r3, r1, r3, asl #12 /* r3 = t1 = d0 - (block[2] << 11) */
add r9, r2, r4 /* r9 = tmp = (d1+d3)*(1108/4) */
add r10, r9, r9, asl #2
add r10, r10, r9, asl #4
add r9, r10, r9, asl #8
add r10, r2, r2, asl #4 /* r2 = t2 = tmp + (d1*(1568/32)*8) */
add r2, r10, r2, asl #5
add r2, r9, r2, asl #3
add r10, r4, r4, asl #2 /* r4 = t3 = tmp - (d3*(3784/8)*2) */
rsb r10, r10, r4, asl #6
add r4, r4, r10, asl #3
sub r4, r9, r4, asl #1
/* t2 & t3 are 1/4 final value here */
add r1, r1, r2, asl #2 /* r1 = a0 = t0 + t2 */
sub r2, r1, r2, asl #3 /* r2 = a3 = t0 - t2 */
add r3, r3, r4, asl #2 /* r3 = a1 = t1 + t3 */
sub r4, r3, r4, asl #3 /* r4 = a2 = t1 - t3 */
add r9, r8, r5 /* r9 = tmp = 565*(d3 + d0) */
add r10, r9, r9, asl #4
add r10, r10, r10, asl #5
add r9, r10, r9, asl #2
add r10, r5, r5, asl #4 /* r5 = t0 = tmp + (((2276/4)*d0)*4) */
add r10, r10, r10, asl #5
add r5, r10, r5, asl #3
add r5, r9, r5, asl #2
add r10, r8, r8, asl #2 /* r8 = t1 = tmp - (((3406/2)*d3)*2) */
add r10, r10, r10, asl #4
add r10, r10, r8, asl #7
rsb r8, r8, r10, asl #3
sub r8, r9, r8, asl #1
add r9, r6, r7 /* r9 = tmp = (2408/8)*(d1 + d2) */
add r10, r9, r9, asl #3
add r10, r10, r10, asl #5
add r9, r10, r9, asl #2
add r10, r7, r7, asl #3 /* r7 = t2 = (tmp*8) - 799*d2 */
add r10, r10, r7, asl #4
rsb r7, r7, r10, asl #5
rsb r7, r7, r9, asl #3
sub r10, r6, r6, asl #4 /* r6 = t3 = (tmp*8) - 4017*d1 */
sub r10, r10, r6, asl #6
add r10, r10, r6, asl #12
add r6, r10, r6
rsb r6, r6, r9, asl #3
/* t0 = r5, t1 = r8, t2 = r7, t3 = r6*/
add r9, r5, r7 /* r9 = b0 = t0 + t2 */
add r10, r8, r6 /* r10 = b3 = t1 + t3 */
sub r5, r5, r7 /* t0 -= t2 */
sub r8, r8, r6 /* t1 -= t3 */
add r6, r5, r8 /* r6 = t0 + t1 */
sub r7, r5, r8 /* r7 = t0 - t1 */
add r11, r6, r6, asr #2 /* r6 = b1 = r6*(181/128) */
add r11, r11, r11, asr #5
add r6, r11, r6, asr #3
add r11, r7, r7, asr #2 /* r7 = b2 = r7*(181/128) */
add r11, r11, r11, asr #5
add r7, r11, r7, asr #3
/* r1 = a0, r3 = a1, r4 = a2, r2 = a3 */
/* r9 = b0, r6 = b1*2, r7 = b2*2, r10 = b3 */
add r5, r1, r9 /* block[0] = (a0 + b0) >> 12 */
mov r5, r5, asr #12
strh r5, [r0], #2
add r8, r3, r6, asr #1 /* block[1] = (a1 + b1) >> 12 */
mov r8, r8, asr #12
strh r8, [r0], #2
add r5, r4, r7, asr #1 /* block[2] = (a2 + b2) >> 12 */
mov r5, r5, asr #12
strh r5, [r0], #2
add r8, r2, r10 /* block[3] = (a3 + b3) >> 12 */
mov r8, r8, asr #12
strh r8, [r0], #2
sub r5, r2, r10 /* block[4] = (a3 - b3) >> 12 */
mov r5, r5, asr #12
strh r5, [r0], #2
sub r8, r4, r7, asr #1 /* block[5] = (a2 - b2) >> 12 */
mov r8, r8, asr #12
strh r8, [r0], #2
sub r5, r3, r6, asr #1 /* block[6] = (a1 - b1) >> 12 */
mov r5, r5, asr #12
strh r5, [r0], #2
sub r8, r1, r9 /* block[7] = (a0 - b0) >> 12 */
mov r8, r8, asr #12
strh r8, [r0], #2
cmp r0, r12
blo 1b
3:
sub r0, r0, #128
add r12, r0, #16
4:
ldrsh r1, [r0, #0*8] /* d0 */
ldrsh r2, [r0, #2*8] /* d1 */
ldrsh r3, [r0, #4*8] /* d2 */
ldrsh r4, [r0, #6*8] /* d3 */
ldrsh r5, [r0, #8*8] /* d0 */
ldrsh r6, [r0, #10*8] /* d1 */
ldrsh r7, [r0, #12*8] /* d2 */
ldrsh r8, [r0, #14*8] /* d3 */
mov r1, r1, asl #11 /* r1 = d0 = (block[0] << 11) + 2048 */
add r1, r1, #65536
add r1, r1, r3, asl #11 /* r1 = t0 = d0 + d2:(block[2] << 11) */
sub r3, r1, r3, asl #12 /* r3 = t1 = d0 - d2:(block[2] << 11) */
add r9, r2, r4 /* r9 = tmp = (d1+d3)*(1108/4) */
add r10, r9, r9, asl #2
add r10, r10, r9, asl #4
add r9, r10, r9, asl #8
add r11, r2, r2, asl #4 /* r2 = t2 = tmp + (d1*(1568/32)*8) */
add r2, r11, r2, asl #5
add r2, r9, r2, asl #3
add r10, r4, r4, asl #2 /* r4 = t3 = tmp - (d3*(3784/8)*2) */
rsb r10, r10, r4, asl #6
add r4, r4, r10, asl #3
sub r4, r9, r4, asl #1
/* t2 & t3 are 1/4 final value here */
add r1, r1, r2, asl #2 /* r1 = a0 = t0 + t2 */
sub r2, r1, r2, asl #3 /* r2 = a3 = t0 - t2 */
add r3, r3, r4, asl #2 /* r3 = a1 = t1 + t3 */
sub r4, r3, r4, asl #3 /* r4 = a2 = t1 - t3 */
add r9, r8, r5 /* r9 = tmp = 565*(d3 + d0) */
add r10, r9, r9, asl #4
add r10, r10, r10, asl #5
add r9, r10, r9, asl #2
add r10, r5, r5, asl #4 /* r5 = t0 = tmp + (((2276/4)*d0)*4) */
add r10, r10, r10, asl #5
add r5, r10, r5, asl #3
add r5, r9, r5, asl #2
add r10, r8, r8, asl #2 /* r8 = t1 = tmp - (((3406/2)*d3)*2) */
add r10, r10, r10, asl #4
add r10, r10, r8, asl #7
rsb r8, r8, r10, asl #3
sub r8, r9, r8, asl #1
add r9, r6, r7 /* r9 = tmp = (2408/8)*(d1 + d2) */
add r10, r9, r9, asl #3
add r10, r10, r10, asl #5
add r9, r10, r9, asl #2
add r10, r7, r7, asl #3 /* r7 = t2 = (tmp*8) - 799*d2 */
add r10, r10, r7, asl #4
rsb r7, r7, r10, asl #5
rsb r7, r7, r9, asl #3
sub r10, r6, r6, asl #4 /* r6 = t3 = (tmp*8) - 4017*d1 */
sub r10, r10, r6, asl #6
add r10, r10, r6, asl #12
add r6, r10, r6
rsb r6, r6, r9, asl #3
/* t0=r5, t1=r8, t2=r7, t3=r6*/
add r9, r5, r7 /* r9 = b0 = t0 + t2 */
add r10, r8, r6 /* r10 = b3 = t1 + t3 */
sub r5, r5, r7 /* t0 -= t2 */
sub r8, r8, r6 /* t1 -= t3 */
add r6, r5, r8 /* r6 = t0 + t1 */
sub r7, r5, r8 /* r7 = t0 - t1 */
add r11, r6, r6, asr #2 /* r6 = b1 = r5*(181/128) */
add r11, r11, r11, asr #5
add r6, r11, r6, asr #3
add r11, r7, r7, asr #2 /* r7 = b2 = r6*(181/128) */
add r11, r11, r11, asr #5
add r7, r11, r7, asr #3
/* r1 = a0, r3 = a1, r4 = a2, r2 = a3 */
/* r9 = b0, r6 = b1*2, r7 = b2*2, r10 = b3 */
add r5, r1, r9 /* block[0] = (a0 + b0) >> 17 */
mov r5, r5, asr #17
strh r5, [r0, #0*8]
add r8, r3, r6, asr #1 /* block[1] = (a1 + b1) >> 17 */
mov r8, r8, asr #17
strh r8, [r0, #2*8]
add r5, r4, r7, asr #1 /* block[2] = (a2 + b2) >> 17 */
mov r5, r5, asr #17
strh r5, [r0, #4*8]
add r8, r2, r10 /* block[3] = (a3 + b3) >> 17 */
mov r8, r8, asr #17
strh r8, [r0, #6*8]
sub r5, r2, r10 /* block[4] = (a3 - b3) >> 17 */
mov r5, r5, asr #17
strh r5, [r0, #8*8]
sub r8, r4, r7, asr #1 /* block[5] = (a2 - b2) >> 17 */
mov r8, r8, asr #17
strh r8, [r0, #10*8]
sub r5, r3, r6, asr #1 /* block[6] = (a1 - b1) >> 17 */
mov r5, r5, asr #17
strh r5, [r0, #12*8]
sub r8, r1, r9 /* block[7] = (a0 - b0) >> 17 */
mov r8, r8, asr #17
strh r8, [r0, #14*8]
add r0, r0, #2
cmp r0, r12
blo 4b
sub r0, r0, #16
bx lr
mpeg2_idct_copy:
stmfd sp!, { r1-r2, r4-r11, lr }
bl .idct
ldmfd sp!, { r1-r2 }
mov r11, #0
add r12, r0, #128
1:
ldrsh r3, [r0, #0]
ldrsh r4, [r0, #2]
ldrsh r5, [r0, #4]
ldrsh r6, [r0, #6]
ldrsh r7, [r0, #8]
ldrsh r8, [r0, #10]
ldrsh r9, [r0, #12]
ldrsh r10, [r0, #14]
cmp r3, #255
mvnhi r3, r3, asr #31
strb r3, [r1, #0]
str r11, [r0], #4
cmp r4, #255
mvnhi r4, r4, asr #31
strb r4, [r1, #1]
cmp r5, #255
mvnhi r5, r5, asr #31
strb r5, [r1, #2]
str r11, [r0], #4
cmp r6, #255
mvnhi r6, r6, asr #31
strb r6, [r1, #3]
cmp r7, #255
mvnhi r7, r7, asr #31
strb r7, [r1, #4]
str r11, [r0], #4
cmp r8, #255
mvnhi r8, r8, asr #31
strb r8, [r1, #5]
cmp r9, #255
mvnhi r9, r9, asr #31
strb r9, [r1, #6]
str r11, [r0], #4
cmp r10, #255
mvnhi r10, r10, asr #31
strb r10, [r1, #7]
add r1, r1, r2
cmp r0, r12
blo 1b
ldmpc regs=r4-r11
mpeg2_idct_add:
cmp r0, #129
mov r0, r1
ldreqsh r1, [r0, #0]
bne 1f
and r1, r1, #0x70
cmp r1, #0x40
bne 3f
1:
stmfd sp!, { r2-r11, lr }
bl .idct
ldmfd sp!, { r1-r2 }
mov r11, #0
add r12, r0, #128
2:
ldrb r3, [r1, #0]
ldrb r4, [r1, #1]
ldrb r5, [r1, #2]
ldrb r6, [r1, #3]
ldrsh r7, [r0, #0]
ldrsh r8, [r0, #2]
ldrsh r9, [r0, #4]
ldrsh r10, [r0, #6]
add r7, r7, r3
ldrb r3, [r1, #4]
cmp r7, #255
mvnhi r7, r7, asr #31
strb r7, [r1, #0]
ldrsh r7, [r0, #8]
add r8, r8, r4
ldrb r4, [r1, #5]
cmp r8, #255
mvnhi r8, r8, asr #31
strb r8, [r1, #1]
ldrsh r8, [r0, #10]
add r9, r9, r5
ldrb r5, [r1, #6]
cmp r9, #255
mvnhi r9, r9, asr #31
strb r9, [r1, #2]
ldrsh r9, [r0, #12]
add r10, r10, r6
ldrb r6, [r1, #7]
cmp r10, #255
mvnhi r10, r10, asr #31
strb r10, [r1, #3]
ldrsh r10, [r0, #14]
str r11, [r0], #4
add r7, r7, r3
cmp r7, #255
mvnhi r7, r7, asr #31
strb r7, [r1, #4]
str r11, [r0], #4
add r8, r8, r4
cmp r8, #255
mvnhi r8, r8, asr #31
strb r8, [r1, #5]
str r11, [r0], #4
add r9, r9, r5
cmp r9, #255
mvnhi r9, r9, asr #31
strb r9, [r1, #6]
add r10, r10, r6
cmp r10, #255
mvnhi r10, r10, asr #31
strb r10, [r1, #7]
str r11, [r0], #4
add r1, r1, r2
cmp r0, r12
blo 2b
ldmpc regs=r4-r11
3:
stmfd sp!, { r4-r5, lr }
ldrsh r1, [r0, #0] /* r1 = block[0] */
mov r4, #0
strh r4, [r0, #0] /* block[0] = 0 */
strh r4, [r0, #126] /* block[63] = 0 */
add r1, r1, #64 /* r1 = DC << 7 */
add r0, r2, r3, asl #3
4:
ldrb r4, [r2, #0]
ldrb r5, [r2, #1]
ldrb r12, [r2, #2]
ldrb lr, [r2, #3]
add r4, r4, r1, asr #7
cmp r4, #255
mvnhi r4, r4, asr #31
strb r4, [r2, #0]
add r5, r5, r1, asr #7
cmp r5, #255
mvnhi r5, r5, asr #31
strb r5, [r2, #1]
add r12, r12, r1, asr #7
cmp r12, #255
mvnhi r12, r12, asr #31
strb r12, [r2, #2]
add lr, lr, r1, asr #7
cmp lr, #255
mvnhi lr, lr, asr #31
strb lr, [r2, #3]
ldrb r4, [r2, #4]
ldrb r5, [r2, #5]
ldrb r12, [r2, #6]
ldrb lr, [r2, #7]
add r4, r4, r1, asr #7
cmp r4, #255
mvnhi r4, r4, asr #31
strb r4, [r2, #4]
add r5, r5, r1, asr #7
cmp r5, #255
mvnhi r5, r5, asr #31
strb r5, [r2, #5]
add r12, r12, r1, asr #7
cmp r12, #255
mvnhi r12, r12, asr #31
strb r12, [r2, #6]
add lr, lr, r1, asr #7
cmp lr, #255
mvnhi lr, lr, asr #31
strb lr, [r2, #7]
add r2, r2, r3
cmp r2, r0
blo 4b
ldmpc regs=r4-r5
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