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- fixed some bugs in RLE decoder 

- some cleanup, home i didn't break it...


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@7402 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
arpi 2002-09-15 13:29:00 +00:00
parent 977bc3ded4
commit 1adce2c92a
1 changed files with 39 additions and 52 deletions
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91
libmpcodecs/vd_mtga.c
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@ -20,7 +20,7 @@ static vd_info_t info =
{
"TGA Images decoder",
"mtga",
"Tilman Sauerbeck",
"Tilman Sauerbeck, A'rpi",
"Tilman Sauerbeck",
"only 24bpp and 32bpp RGB targa files support so far"
};
@ -63,20 +63,13 @@ static int last_c = -1;
static int control(sh_video_t *sh, int cmd, void *arg, ...)
{
TGAInfo *info = (TGAInfo *) sh->context;
switch (cmd)
{
case VDCTRL_QUERY_FORMAT:
if ((*((int *) arg) == IMGFMT_BGR32 && info->bpp == 32) || (*((int *) arg) == IMGFMT_BGR24 && info->bpp == 24))
return CONTROL_TRUE;
else
return CONTROL_FALSE;
break;
default:
return CONTROL_UNKNOWN;
break;
if (*((int *) arg) == out_fmt) return CONTROL_TRUE;
return CONTROL_FALSE;
}
return CONTROL_UNKNOWN;
}
/* init driver */
@ -85,7 +78,6 @@ static int init(sh_video_t *sh)
sh->context = (TGAInfo *) calloc(1, sizeof(TGAInfo));
last_w = -1;
return 1;
}
@ -94,89 +86,85 @@ static int init(sh_video_t *sh)
static void uninit(sh_video_t *sh)
{
TGAInfo *info = sh->context;
free(info);
return;
}
/* decode a runlength-encoded tga */
static void decode_rle_tga(TGAInfo *info, unsigned char *data, mp_image_t **mpi)
static void decode_rle_tga(TGAInfo *info, unsigned char *data, mp_image_t *mpi)
{
short i, num_bytes = info->bpp / 8;
int row, col, replen, i, num_bytes = info->bpp / 8;
unsigned char repetitions, packet_header, *final;
unsigned short row, col;
/* see line 207 to see why this loop is set up like this */
for (row = info->start_row; (!info->origin && row) || (info->origin && row < info->height); row += info->increment)
{
final = (*mpi)->planes[0] + (*mpi)->stride[0] * row;
final = mpi->planes[0] + mpi->stride[0] * row;
for (col = 0; col < info->width; col += repetitions)
{
packet_header = *data++;
repetitions = 1 + (packet_header & 0x7f);
repetitions = (1 + (packet_header & 0x7f));
replen = repetitions * num_bytes;
if (packet_header & 0x80) /* runlength encoded packet */
{
memcpy(final, data, num_bytes);
for (i = num_bytes; i < repetitions; i *= 2)
memcpy(&final[i], final, i);
for (; i < repetitions * num_bytes; i += 3)
memcpy(&final[i], final, num_bytes);
// Note: this will be slow when DR to vram!
i=num_bytes;
while(2*i<=replen){
memcpy(final+i,final,i);
i*=2;
}
memcpy(final+i,final,replen-i);
data += num_bytes;
}
else /* raw packet */
memcpy(final, data, repetitions * num_bytes);
data += (packet_header & 0x80) ? num_bytes : repetitions * num_bytes;
final += repetitions * num_bytes;
{
memcpy(final, data, replen);
data += replen;
}
final += replen;
}
}
return;
}
static void decode_uncompressed_tga(TGAInfo *info, unsigned char *data, mp_image_t **mpi)
static void decode_uncompressed_tga(TGAInfo *info, unsigned char *data, mp_image_t *mpi)
{
unsigned short row;
unsigned char *final;
short num_bytes = info->bpp / 8;
int row, num_bytes = info->bpp / 8;
/* see line 207 to see why this loop is set up like this */
for (row = info->start_row; (!info->origin && row) || (info->origin && row < info->height); row += info->increment)
{
final = (*mpi)->planes[0] + (*mpi)->stride[0] * row;
final = mpi->planes[0] + mpi->stride[0] * row;
memcpy(final, data, info->width * num_bytes);
data += info->width * num_bytes;
}
return;
}
static short read_tga_header(unsigned char *buf, TGAInfo **info)
static short read_tga_header(unsigned char *buf, TGAInfo *info)
{
(*info)->id_len = buf[0];
info->id_len = buf[0];
(*info)->img_type = buf[2];
info->img_type = buf[2];
/* targa data is always stored in little endian byte order */
(*info)->width = le2me_16(*(unsigned short *) &buf[12]);
(*info)->height = le2me_16(*(unsigned short *) &buf[14]);
info->width = le2me_16(*(unsigned short *) &buf[12]);
info->height = le2me_16(*(unsigned short *) &buf[14]);
(*info)->bpp = buf[16];
info->bpp = buf[16];
(*info)->origin = (buf[17] & 0x20) >> 5;
info->origin = (buf[17] & 0x20) >> 5;
/* FIXME check for valid targa data */
@ -195,7 +183,7 @@ static mp_image_t *decode(sh_video_t *sh, void *raw, int len, int flags)
if (len <= 0)
return NULL; /* skip frame */
read_tga_header(data, &info); /* read information about the file */
read_tga_header(data, info); /* read information about the file */
if (info->bpp == 24)
out_fmt = IMGFMT_BGR24;
@ -203,7 +191,7 @@ static mp_image_t *decode(sh_video_t *sh, void *raw, int len, int flags)
out_fmt = IMGFMT_BGR32;
else
{
mp_msg(MSGT_DECVIDEO, MSGL_INFO, "Unsupported TGA type!\n");
mp_msg(MSGT_DECVIDEO, MSGL_INFO, "Unsupported TGA type! depth=%d\n",info->bpp);
return NULL;
}
@ -236,12 +224,11 @@ static mp_image_t *decode(sh_video_t *sh, void *raw, int len, int flags)
/* finally decode the image */
if (info->img_type == TGA_UNCOMP_TRUECOLOR)
decode_uncompressed_tga(info, data, &mpi);
decode_uncompressed_tga(info, data, mpi);
else if (info->img_type == TGA_RLE_TRUECOLOR)
decode_rle_tga(info, data, &mpi);
else
mpi = NULL;
decode_rle_tga(info, data, mpi);
// else
// mpi = NULL;
return mpi;
}