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Diffstat (limited to 'libmpcodecs/vd_sgi.c')
-rw-r--r--libmpcodecs/vd_sgi.c83
1 files changed, 41 insertions, 42 deletions
diff --git a/libmpcodecs/vd_sgi.c b/libmpcodecs/vd_sgi.c
index e4e72285b9..3ab1ed18fa 100644
--- a/libmpcodecs/vd_sgi.c
+++ b/libmpcodecs/vd_sgi.c
@@ -51,7 +51,7 @@ static unsigned short last_y = -1;
/* to set/get/query special features/parameters */
static int
control(sh_video_t* sh, int cmd, void *arg, ...)
-{
+{
switch (cmd)
{
case VDCTRL_QUERY_FORMAT:
@@ -90,10 +90,10 @@ expandrow(unsigned char *optr, unsigned char *iptr, int chan_offset)
{
unsigned char pixel, count;
optr += chan_offset;
-
+
while (1) {
pixel = *iptr++;
-
+
if (!(count = (pixel & 0x7f))) {
return;
}
@@ -105,7 +105,7 @@ expandrow(unsigned char *optr, unsigned char *iptr, int chan_offset)
}
} else {
pixel = *iptr++;
-
+
while (count--) {
*optr = pixel;
optr += OUT_PIXEL_STRIDE;
@@ -116,16 +116,16 @@ expandrow(unsigned char *optr, unsigned char *iptr, int chan_offset)
/* expand an rle row into all 3 channels.
- a separate function for grayscale so we don't slow down the
+ a separate function for grayscale so we don't slow down the
more common case rgb function with a bunch of ifs. */
static void
expandrow_gs(unsigned char *optr, unsigned char *iptr)
{
unsigned char pixel, count;
-
+
while (1) {
pixel = *iptr++;
-
+
if (!(count = (pixel & 0x7f))) {
return;
}
@@ -139,7 +139,7 @@ expandrow_gs(unsigned char *optr, unsigned char *iptr)
}
} else {
pixel = *iptr++;
-
+
while (count--) {
optr[0] = pixel;
optr[1] = pixel;
@@ -159,29 +159,29 @@ decode_rle_sgi(SGIInfo *info, unsigned char *data, mp_image_t *mpi)
uint32_t *starttab;
int y, z, xsize, ysize, zsize, chan_offset;
long start_offset;
-
+
xsize = info->xsize;
ysize = info->ysize;
zsize = info->zsize;
/* rle offset table is right after the header */
- starttab = (uint32_t*)(data + SGI_HEADER_LEN);
-
+ starttab = (uint32_t*)(data + SGI_HEADER_LEN);
+
for (z = 0; z < zsize; z++) {
/* set chan_offset so RGB ends up BGR */
chan_offset = (zsize - 1) - z;
-
+
/* The origin for SGI images is the lower-left corner
so read scan lines from bottom to top */
for (y = ysize - 1; y >= 0; y--) {
dest_row = mpi->planes[0] + mpi->stride[0] * (ysize - 1 - y);
-
+
/* set start of next run (offsets are from start of header) */
start_offset = be2me_32(*(uint32_t*) &starttab[y + z * ysize]);
-
+
rle_data = &data[start_offset];
-
+
if(info->zsize == SGI_GRAYSCALE_IMAGE) {
expandrow_gs(dest_row, rle_data);
} else {
@@ -191,21 +191,21 @@ decode_rle_sgi(SGIInfo *info, unsigned char *data, mp_image_t *mpi)
}
}
-
+
/* decode an sgi image */
static void
decode_uncompressed_sgi(SGIInfo *info, unsigned char *data, mp_image_t *mpi)
{
unsigned char *src_row, *dest_row;
int x, y, z, xsize, ysize, zsize, chan_offset;
-
+
xsize = info->xsize;
ysize = info->ysize;
zsize = info->zsize;
-
- /* skip header */
+
+ /* skip header */
data += SGI_HEADER_LEN;
-
+
for (z = 0; z < zsize; z++) {
/* set row ptr to start of current plane */
@@ -213,13 +213,13 @@ decode_uncompressed_sgi(SGIInfo *info, unsigned char *data, mp_image_t *mpi)
/* set chan_offset for RGB -> BGR */
chan_offset = (zsize - 1) - z;
-
- /* the origin for SGI images is the lower-left corner
+
+ /* the origin for SGI images is the lower-left corner
so read scan lines from bottom to top. */
for (y = ysize - 1; y >= 0; y--) {
dest_row = mpi->planes[0] + mpi->stride[0] * y;
for (x = 0; x < xsize; x++) {
-
+
/* we only do 24 bit output so promote 8 bit pixels to 24 */
if (zsize == SGI_GRAYSCALE_IMAGE) {
/* write greyscale value into all channels */
@@ -229,7 +229,7 @@ decode_uncompressed_sgi(SGIInfo *info, unsigned char *data, mp_image_t *mpi)
} else {
dest_row[chan_offset] = src_row[x];
}
-
+
dest_row += OUT_PIXEL_STRIDE;
}
@@ -245,13 +245,13 @@ static void
read_sgi_header(unsigned char *buf, SGIInfo *info)
{
/* sgi data is always stored in big endian byte order */
- info->magic = be2me_16(*(unsigned short *) &buf[0]);
+ info->magic = be2me_16(*(unsigned short *) &buf[0]);
info->rle = buf[2];
info->bytes_per_channel = buf[3];
- info->dimension = be2me_16(*(unsigned short *) &buf[4]);
- info->xsize = be2me_16(*(unsigned short *) &buf[6]);
- info->ysize = be2me_16(*(unsigned short *) &buf[8]);
- info->zsize = be2me_16(*(unsigned short *) &buf[10]);
+ info->dimension = be2me_16(*(unsigned short *) &buf[4]);
+ info->xsize = be2me_16(*(unsigned short *) &buf[6]);
+ info->ysize = be2me_16(*(unsigned short *) &buf[8]);
+ info->zsize = be2me_16(*(unsigned short *) &buf[10]);
}
@@ -266,9 +266,9 @@ mp_image_t *decode(sh_video_t *sh, void *raw, int len, int flags)
if (len <= 0) {
return NULL; /* skip frame */
}
-
- read_sgi_header(data, info);
-
+
+ read_sgi_header(data, info);
+
/* make sure this is an SGI image file */
if (info->magic != SGI_MAGIC) {
mp_msg(MSGT_DECVIDEO, MSGL_INFO, "Bad magic number in image.\n");
@@ -277,19 +277,19 @@ mp_image_t *decode(sh_video_t *sh, void *raw, int len, int flags)
/* check image depth */
if (info->bytes_per_channel != 1) {
- mp_msg(MSGT_DECVIDEO, MSGL_INFO,
+ mp_msg(MSGT_DECVIDEO, MSGL_INFO,
"Unsupported bytes per channel value %i.\n", info->bytes_per_channel);
return NULL;
}
/* check image dimension */
if (info->dimension != 2 && info->dimension != 3) {
- mp_msg(MSGT_DECVIDEO, MSGL_INFO, "Unsupported image dimension %i.\n",
+ mp_msg(MSGT_DECVIDEO, MSGL_INFO, "Unsupported image dimension %i.\n",
info->dimension);
return NULL;
}
- /* change rgba images to rgb so alpha channel will be ignored */
+ /* change rgba images to rgb so alpha channel will be ignored */
if (info->zsize == SGI_RGBA_IMAGE) {
info->zsize = SGI_RGB_IMAGE;
}
@@ -299,30 +299,29 @@ mp_image_t *decode(sh_video_t *sh, void *raw, int len, int flags)
mp_msg(MSGT_DECVIDEO, MSGL_INFO, "Unsupported image depth.\n");
return NULL;
}
-
+
/* (re)init libvo if image size is changed */
if (last_x != info->xsize || last_y != info->ysize)
{
last_x = info->xsize;
last_y = info->ysize;
-
+
if (!mpcodecs_config_vo(sh, info->xsize, info->ysize, outfmt)) {
mp_msg(MSGT_DECVIDEO, MSGL_INFO, "Config vo failed:\n");
return NULL;
}
}
-
- if (!(mpi = mpcodecs_get_image(sh, MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE,
+
+ if (!(mpi = mpcodecs_get_image(sh, MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE,
info->xsize, info->ysize))) {
return NULL;
}
-
+
if (info->rle) {
decode_rle_sgi(info, data, mpi);
} else {
decode_uncompressed_sgi(info, data, mpi);
}
-
+
return mpi;
}
-
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-26 00:43:49 +0000