gstreamer/gst/videoflip/videoflip.c
Thomas Vander Stichele 6cc1c73d2b don't mix tabs and spaces
Original commit message from CVS:
don't mix tabs and spaces
2004-03-15 19:32:27 +00:00

238 lines
6.3 KiB
C

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#define DEBUG_ENABLED
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <stdlib.h>
#include <math.h>
#include <videoflip.h>
#include <string.h>
#include "gstvideoflip.h"
static void gst_videoflip_planar411 (GstVideoflip * scale, unsigned char *dest,
unsigned char *src);
static void gst_videoflip_flip (GstVideoflip * videoflip, unsigned char *dest,
unsigned char *src, int sw, int sh, int dw, int dh);
struct videoflip_format_struct videoflip_formats[] = {
/* planar */
{"YV12", 12, gst_videoflip_planar411,},
{"I420", 12, gst_videoflip_planar411,},
};
int videoflip_n_formats =
sizeof (videoflip_formats) / sizeof (videoflip_formats[0]);
GstStructure *
videoflip_get_cap (struct videoflip_format_struct *format)
{
unsigned int fourcc;
GstStructure *structure;
if (format->scale == NULL)
return NULL;
fourcc =
GST_MAKE_FOURCC (format->fourcc[0], format->fourcc[1], format->fourcc[2],
format->fourcc[3]);
if (format->bpp) {
structure = gst_structure_new ("video/x-raw-rgb",
"depth", G_TYPE_INT, format->bpp,
"bpp", G_TYPE_INT, format->depth,
"endianness", G_TYPE_INT, format->endianness,
"red_mask", G_TYPE_INT, format->red_mask,
"green_mask", G_TYPE_INT, format->green_mask,
"blue_mask", G_TYPE_INT, format->blue_mask, NULL);
} else {
structure = gst_structure_new ("video/x-raw-yuv",
"format", GST_TYPE_FOURCC, fourcc, NULL);
}
return structure;
}
struct videoflip_format_struct *
videoflip_find_by_caps (const GstCaps * caps)
{
int i;
GST_DEBUG ("finding %p", caps);
g_return_val_if_fail (caps != NULL, NULL);
for (i = 0; i < videoflip_n_formats; i++) {
GstCaps *c;
c = gst_caps_new_full (videoflip_get_cap (videoflip_formats + i), NULL);
if (c) {
if (gst_caps_is_always_compatible (caps, c)) {
gst_caps_free (c);
return videoflip_formats + i;
}
gst_caps_free (c);
}
}
return NULL;
}
void
gst_videoflip_setup (GstVideoflip * videoflip)
{
if (videoflip->from_width == 0 || videoflip->from_height == 0) {
return;
}
switch (videoflip->method) {
case GST_VIDEOFLIP_METHOD_90R:
case GST_VIDEOFLIP_METHOD_90L:
case GST_VIDEOFLIP_METHOD_TRANS:
case GST_VIDEOFLIP_METHOD_OTHER:
videoflip->to_height = videoflip->from_width;
videoflip->to_width = videoflip->from_height;
break;
case GST_VIDEOFLIP_METHOD_IDENTITY:
case GST_VIDEOFLIP_METHOD_180:
case GST_VIDEOFLIP_METHOD_HORIZ:
case GST_VIDEOFLIP_METHOD_VERT:
videoflip->to_height = videoflip->from_height;
videoflip->to_width = videoflip->from_width;
break;
default:
/* FIXME */
break;
}
GST_DEBUG ("format=%p \"%s\" from %dx%d to %dx%d",
videoflip->format, videoflip->format->fourcc,
videoflip->from_width, videoflip->from_height,
videoflip->to_width, videoflip->to_height);
if (videoflip->method == GST_VIDEOFLIP_METHOD_IDENTITY) {
GST_DEBUG ("videoflip: using passthru");
videoflip->passthru = TRUE;
videoflip->inited = TRUE;
return;
}
videoflip->from_buf_size = (videoflip->from_width * videoflip->from_height
* videoflip->format->depth) / 8;
videoflip->to_buf_size = (videoflip->to_width * videoflip->to_height
* videoflip->format->depth) / 8;
videoflip->inited = TRUE;
}
static void
gst_videoflip_planar411 (GstVideoflip * scale, unsigned char *dest,
unsigned char *src)
{
int sw = scale->from_width;
int sh = scale->from_height;
int dw = scale->to_width;
int dh = scale->to_height;
GST_DEBUG ("videoflip: scaling planar 4:1:1 %dx%d to %dx%d", sw, sh, dw, dh);
gst_videoflip_flip (scale, dest, src, sw, sh, dw, dh);
src += sw * sh;
dest += dw * dh;
dh = dh >> 1;
dw = dw >> 1;
sh = sh >> 1;
sw = sw >> 1;
gst_videoflip_flip (scale, dest, src, sw, sh, dw, dh);
src += sw * sh;
dest += dw * dh;
gst_videoflip_flip (scale, dest, src, sw, sh, dw, dh);
}
static void
gst_videoflip_flip (GstVideoflip * videoflip, unsigned char *dest,
unsigned char *src, int sw, int sh, int dw, int dh)
{
int x, y;
switch (videoflip->method) {
case GST_VIDEOFLIP_METHOD_90R:
for (y = 0; y < dh; y++) {
for (x = 0; x < dw; x++) {
dest[y * dw + x] = src[(sh - 1 - x) * sw + y];
}
}
break;
case GST_VIDEOFLIP_METHOD_90L:
for (y = 0; y < dh; y++) {
for (x = 0; x < dw; x++) {
dest[y * dw + x] = src[x * sw + (sw - 1 - y)];
}
}
break;
case GST_VIDEOFLIP_METHOD_180:
for (y = 0; y < dh; y++) {
for (x = 0; x < dw; x++) {
dest[y * dw + x] = src[(sh - 1 - y) * sw + (sw - 1 - x)];
}
}
break;
case GST_VIDEOFLIP_METHOD_HORIZ:
for (y = 0; y < dh; y++) {
for (x = 0; x < dw; x++) {
dest[y * dw + x] = src[y * sw + (sw - 1 - x)];
}
}
break;
case GST_VIDEOFLIP_METHOD_VERT:
for (y = 0; y < dh; y++) {
for (x = 0; x < dw; x++) {
dest[y * dw + x] = src[(sh - 1 - y) * sw + x];
}
}
break;
case GST_VIDEOFLIP_METHOD_TRANS:
for (y = 0; y < dh; y++) {
for (x = 0; x < dw; x++) {
dest[y * dw + x] = src[x * sw + y];
}
}
break;
case GST_VIDEOFLIP_METHOD_OTHER:
for (y = 0; y < dh; y++) {
for (x = 0; x < dw; x++) {
dest[y * dw + x] = src[(sh - 1 - x) * sw + (sw - 1 - y)];
}
}
break;
default:
/* FIXME */
break;
}
}