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Original commit message from CVS: * gst/videoscale/videoscale.c: (gst_videoscale_scale_nearest), (gst_videoscale_scale_nearest_str2), (gst_videoscale_scale_nearest_str4), (gst_videoscale_scale_nearest_32bit), (gst_videoscale_scale_nearest_24bit), (gst_videoscale_scale_nearest_16bit): Fix the scaling algorithm and avoid a buffer overflow. removed the while loop in the scaling function as it was used for point sampling only.
815 lines
21 KiB
C
815 lines
21 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#define DEBUG_ENABLED
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/gst.h>
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#include <stdlib.h>
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#include <math.h>
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#include <videoscale.h>
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#include <string.h>
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#include "gstvideoscale.h"
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#undef HAVE_CPU_I386
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#ifdef HAVE_CPU_I386
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#include "videoscale_x86.h"
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#endif
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/* scalers */
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static void gst_videoscale_scale_nearest (GstVideoscale * scale,
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unsigned char *dest, unsigned char *src, int sw, int sh, int dw, int dh);
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#if 0
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static void gst_videoscale_scale_plane_slow (GstVideoscale * scale,
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unsigned char *src, unsigned char *dest, int sw, int sh, int dw, int dh);
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static void gst_videoscale_scale_point_sample (GstVideoscale * scale,
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unsigned char *src, unsigned char *dest, int sw, int sh, int dw, int dh);
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/* filters */
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static unsigned char gst_videoscale_bilinear (unsigned char *src, double x,
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double y, int sw, int sh);
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static unsigned char gst_videoscale_bicubic (unsigned char *src, double x,
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double y, int sw, int sh);
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#endif
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static void gst_videoscale_planar411 (GstVideoscale * scale,
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unsigned char *dest, unsigned char *src);
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static void gst_videoscale_planar400 (GstVideoscale * scale,
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unsigned char *dest, unsigned char *src);
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static void gst_videoscale_packed422 (GstVideoscale * scale,
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unsigned char *dest, unsigned char *src);
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static void gst_videoscale_packed422rev (GstVideoscale * scale,
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unsigned char *dest, unsigned char *src);
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static void gst_videoscale_32bit (GstVideoscale * scale, unsigned char *dest,
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unsigned char *src);
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static void gst_videoscale_24bit (GstVideoscale * scale, unsigned char *dest,
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unsigned char *src);
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static void gst_videoscale_16bit (GstVideoscale * scale, unsigned char *dest,
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unsigned char *src);
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static void gst_videoscale_scale_nearest_str2 (GstVideoscale * scale,
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unsigned char *dest, unsigned char *src, int sw, int sh, int dw, int dh);
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static void gst_videoscale_scale_nearest_str4 (GstVideoscale * scale,
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unsigned char *dest, unsigned char *src, int sw, int sh, int dw, int dh);
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static void gst_videoscale_scale_nearest_32bit (GstVideoscale * scale,
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unsigned char *dest, unsigned char *src, int sw, int sh, int dw, int dh);
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static void gst_videoscale_scale_nearest_24bit (GstVideoscale * scale,
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unsigned char *dest, unsigned char *src, int sw, int sh, int dw, int dh);
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static void gst_videoscale_scale_nearest_16bit (GstVideoscale * scale,
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unsigned char *dest, unsigned char *src, int sw, int sh, int dw, int dh);
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#define fourcc_YUY2 GST_MAKE_FOURCC('Y','U','Y','2')
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#define fourcc_UYVY GST_MAKE_FOURCC('U','Y','V','Y')
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#define fourcc_Y422 GST_MAKE_FOURCC('Y','4','2','2')
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#define fourcc_UYNV GST_MAKE_FOURCC('U','Y','N','V')
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#define fourcc_YVYU GST_MAKE_FOURCC('Y','V','Y','U')
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#define fourcc_YV12 GST_MAKE_FOURCC('Y','V','1','2')
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#define fourcc_I420 GST_MAKE_FOURCC('I','4','2','0')
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#define fourcc_Y800 GST_MAKE_FOURCC('Y','8','0','0')
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#define fourcc_RGB_ GST_MAKE_FOURCC('R','G','B',' ')
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struct videoscale_format_struct videoscale_formats[] = {
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/* packed */
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{fourcc_YUY2, 16, gst_videoscale_packed422,},
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{fourcc_UYVY, 16, gst_videoscale_packed422rev,},
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{fourcc_Y422, 16, gst_videoscale_packed422rev,},
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{fourcc_UYNV, 16, gst_videoscale_packed422rev,},
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{fourcc_YVYU, 16, gst_videoscale_packed422,},
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/* planar */
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{fourcc_YV12, 12, gst_videoscale_planar411,},
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{fourcc_I420, 12, gst_videoscale_planar411,},
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{fourcc_Y800, 8, gst_videoscale_planar400,},
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/* RGB */
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{fourcc_RGB_, 32, gst_videoscale_32bit, 24, G_BIG_ENDIAN, 0x00ff0000,
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0x0000ff00, 0x000000ff},
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{fourcc_RGB_, 32, gst_videoscale_32bit, 24, G_BIG_ENDIAN, 0x000000ff,
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0x0000ff00, 0x00ff0000},
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{fourcc_RGB_, 32, gst_videoscale_32bit, 24, G_BIG_ENDIAN, 0xff000000,
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0x00ff0000, 0x0000ff00},
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{fourcc_RGB_, 32, gst_videoscale_32bit, 24, G_BIG_ENDIAN, 0x0000ff00,
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0x00ff0000, 0xff000000},
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{fourcc_RGB_, 24, gst_videoscale_24bit, 24, G_BIG_ENDIAN, 0xff0000, 0x00ff00,
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0x0000ff},
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{fourcc_RGB_, 24, gst_videoscale_24bit, 24, G_BIG_ENDIAN, 0x0000ff, 0x00ff00,
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0xff0000},
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{fourcc_RGB_, 16, gst_videoscale_16bit, 16, G_BYTE_ORDER, 0xf800, 0x07e0,
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0x001f},
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{fourcc_RGB_, 16, gst_videoscale_16bit, 15, G_BYTE_ORDER, 0x7c00, 0x03e0,
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0x001f},
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};
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int videoscale_n_formats =
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sizeof (videoscale_formats) / sizeof (videoscale_formats[0]);
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GstStructure *
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videoscale_get_structure (struct videoscale_format_struct *format)
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{
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GstStructure *structure;
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if (format->scale == NULL)
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return NULL;
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if (format->depth) {
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structure = gst_structure_new ("video/x-raw-rgb",
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"depth", G_TYPE_INT, format->depth,
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"bpp", G_TYPE_INT, format->bpp,
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"endianness", G_TYPE_INT, format->endianness,
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"red_mask", G_TYPE_INT, format->red_mask,
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"green_mask", G_TYPE_INT, format->green_mask,
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"blue_mask", G_TYPE_INT, format->blue_mask, NULL);
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} else {
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structure = gst_structure_new ("video/x-raw-yuv",
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"format", GST_TYPE_FOURCC, format->fourcc, NULL);
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}
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gst_structure_set (structure,
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"width", GST_TYPE_INT_RANGE, 100, G_MAXINT,
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"height", GST_TYPE_INT_RANGE, 100, G_MAXINT,
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"framerate", GST_TYPE_DOUBLE_RANGE, 0.0, G_MAXDOUBLE, NULL);
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return structure;
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}
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struct videoscale_format_struct *
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videoscale_find_by_structure (GstStructure * structure)
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{
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int i;
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gboolean ret;
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struct videoscale_format_struct *format;
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GST_DEBUG ("finding %s", gst_structure_to_string (structure));
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g_return_val_if_fail (structure != NULL, NULL);
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if (strcmp (gst_structure_get_name (structure), "video/x-raw-yuv") == 0) {
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unsigned int fourcc;
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ret = gst_structure_get_fourcc (structure, "format", &fourcc);
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if (!ret)
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return NULL;
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for (i = 0; i < videoscale_n_formats; i++) {
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format = videoscale_formats + i;
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if (format->depth == 0 && format->fourcc == fourcc) {
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return format;
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}
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}
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} else {
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int bpp;
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int depth;
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int endianness;
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int red_mask;
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int green_mask;
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int blue_mask;
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ret = gst_structure_get_int (structure, "bpp", &bpp);
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ret &= gst_structure_get_int (structure, "depth", &depth);
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ret &= gst_structure_get_int (structure, "endianness", &endianness);
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ret &= gst_structure_get_int (structure, "red_mask", &red_mask);
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ret &= gst_structure_get_int (structure, "green_mask", &green_mask);
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ret &= gst_structure_get_int (structure, "blue_mask", &blue_mask);
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if (!ret)
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return NULL;
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for (i = 0; i < videoscale_n_formats; i++) {
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format = videoscale_formats + i;
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if (format->bpp == bpp && format->depth == depth &&
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format->endianness == endianness && format->red_mask == red_mask &&
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format->green_mask == green_mask && format->blue_mask == blue_mask) {
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return format;
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}
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}
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}
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return NULL;
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}
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void
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gst_videoscale_setup (GstVideoscale * videoscale)
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{
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g_return_if_fail (GST_IS_VIDEOSCALE (videoscale));
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g_return_if_fail (videoscale->format != NULL);
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GST_DEBUG_OBJECT (videoscale, "format=%p " GST_FOURCC_FORMAT
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" from %dx%d to %dx%d",
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videoscale->format,
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GST_FOURCC_ARGS (videoscale->format->fourcc),
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videoscale->from_width, videoscale->from_height,
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videoscale->to_width, videoscale->to_height);
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if (videoscale->to_width == 0 || videoscale->to_height == 0 ||
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videoscale->from_width == 0 || videoscale->from_height == 0) {
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g_critical ("bad sizes %dx%d %dx%d",
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videoscale->from_width, videoscale->from_height,
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videoscale->to_width, videoscale->to_height);
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return;
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}
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if (videoscale->to_width == videoscale->from_width &&
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videoscale->to_height == videoscale->from_height) {
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GST_DEBUG_OBJECT (videoscale, "using passthru");
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videoscale->passthru = TRUE;
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videoscale->inited = TRUE;
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return;
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}
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GST_DEBUG_OBJECT (videoscale, "scaling method POINT_SAMPLE");
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videoscale->from_buf_size = (videoscale->from_width * videoscale->from_height
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* videoscale->format->bpp) / 8;
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videoscale->to_buf_size = (videoscale->to_width * videoscale->to_height
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* videoscale->format->bpp) / 8;
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videoscale->passthru = FALSE;
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videoscale->inited = TRUE;
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}
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#if 0
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static void
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gst_videoscale_scale_rgb (GstVideoscale * scale, unsigned char *dest,
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unsigned char *src)
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{
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int sw = scale->from_width;
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int sh = scale->from_height;
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int dw = scale->to_width;
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int dh = scale->to_height;
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GST_DEBUG_OBJECT (scale, "scaling RGB %dx%d to %dx%d", sw, sh, dw, dh);
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switch (scale->scale_bytes) {
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case 2:
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dw = ((dw + 1) & ~1) << 1;
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sw = sw << 1;
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break;
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case 4:
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dw = ((dw + 2) & ~3) << 2;
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sw = sw << 2;
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break;
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default:
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break;
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}
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GST_DEBUG_OBJECT (scale, "%p %p", src, dest);
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//scale->scaler(scale, src, dest, sw, sh, dw, dh);
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}
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#endif
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static void
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gst_videoscale_planar411 (GstVideoscale * scale, unsigned char *dest,
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unsigned char *src)
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{
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int sw = scale->from_width;
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int sh = scale->from_height;
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int dw = scale->to_width;
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int dh = scale->to_height;
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GST_DEBUG_OBJECT (scale, "scaling planar 4:1:1 %dx%d to %dx%d", sw, sh, dw,
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dh);
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gst_videoscale_scale_nearest (scale, dest, src, sw, sh, dw, dh);
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src += sw * sh;
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dest += dw * dh;
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dh = dh >> 1;
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dw = dw >> 1;
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sh = sh >> 1;
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sw = sw >> 1;
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gst_videoscale_scale_nearest (scale, dest, src, sw, sh, dw, dh);
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src += sw * sh;
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dest += dw * dh;
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gst_videoscale_scale_nearest (scale, dest, src, sw, sh, dw, dh);
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}
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static void
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gst_videoscale_planar400 (GstVideoscale * scale, unsigned char *dest,
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unsigned char *src)
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{
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int sw = scale->from_width;
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int sh = scale->from_height;
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int dw = scale->to_width;
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int dh = scale->to_height;
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GST_DEBUG_OBJECT (scale, "scaling Y-only %dx%d to %dx%d", sw, sh, dw, dh);
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gst_videoscale_scale_nearest (scale, dest, src, sw, sh, dw, dh);
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}
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static void
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gst_videoscale_packed422 (GstVideoscale * scale, unsigned char *dest,
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unsigned char *src)
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{
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int sw = scale->from_width;
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int sh = scale->from_height;
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int dw = scale->to_width;
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int dh = scale->to_height;
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GST_DEBUG_OBJECT (scale, "scaling 4:2:2 %dx%d to %dx%d", sw, sh, dw, dh);
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gst_videoscale_scale_nearest_str2 (scale, dest, src, sw, sh, dw, dh);
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gst_videoscale_scale_nearest_str4 (scale, dest + 1, src + 1, sw / 2, sh,
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dw / 2, dh);
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gst_videoscale_scale_nearest_str4 (scale, dest + 3, src + 3, sw / 2, sh,
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dw / 2, dh);
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}
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static void
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gst_videoscale_packed422rev (GstVideoscale * scale, unsigned char *dest,
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unsigned char *src)
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{
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int sw = scale->from_width;
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int sh = scale->from_height;
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int dw = scale->to_width;
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int dh = scale->to_height;
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GST_DEBUG_OBJECT (scale, "scaling 4:2:2 %dx%d to %dx%d", sw, sh, dw, dh);
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gst_videoscale_scale_nearest_str2 (scale, dest + 1, src, sw, sh, dw, dh);
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gst_videoscale_scale_nearest_str4 (scale, dest, src + 1, sw / 2, sh, dw / 2,
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dh);
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gst_videoscale_scale_nearest_str4 (scale, dest + 2, src + 3, sw / 2, sh,
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dw / 2, dh);
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}
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static void
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gst_videoscale_32bit (GstVideoscale * scale, unsigned char *dest,
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unsigned char *src)
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{
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int sw = scale->from_width;
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int sh = scale->from_height;
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int dw = scale->to_width;
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int dh = scale->to_height;
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GST_DEBUG_OBJECT (scale, "scaling 32bit %dx%d to %dx%d", sw, sh, dw, dh);
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gst_videoscale_scale_nearest_32bit (scale, dest, src, sw, sh, dw, dh);
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}
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static void
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gst_videoscale_24bit (GstVideoscale * scale, unsigned char *dest,
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unsigned char *src)
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{
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int sw = scale->from_width;
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int sh = scale->from_height;
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int dw = scale->to_width;
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int dh = scale->to_height;
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GST_DEBUG_OBJECT (scale, "scaling 24bit %dx%d to %dx%d", sw, sh, dw, dh);
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gst_videoscale_scale_nearest_24bit (scale, dest, src, sw, sh, dw, dh);
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}
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static void
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gst_videoscale_16bit (GstVideoscale * scale, unsigned char *dest,
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unsigned char *src)
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{
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int sw = scale->from_width;
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int sh = scale->from_height;
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int dw = scale->to_width;
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int dh = scale->to_height;
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GST_DEBUG_OBJECT (scale, "scaling 16bit %dx%d to %dx%d", sw, sh, dw, dh);
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gst_videoscale_scale_nearest_16bit (scale, dest, src, sw, sh, dw, dh);
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}
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#if 0
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#define RC(x,y) *(src+(int)(x)+(int)((y)*sw))
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static unsigned char
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gst_videoscale_bilinear (unsigned char *src, double x, double y, int sw, int sh)
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{
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int j = floor (x);
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int k = floor (y);
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double a = x - j;
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double b = y - k;
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double dest;
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int color;
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GST_DEBUG_OBJECT (scale, "scaling bilinear %f %f %dx%d", x, y, sw, sh);
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dest = (1 - a) * (1 - b) * RC (j, k) + a * (1 - b) * RC (j + 1, k);
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k = MIN (sh - 1, k);
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dest += b * (1 - a) * RC (j, k + 1) + a * b * RC (j + 1, k + 1);
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color = rint (dest);
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if (color < 0)
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color = abs (color); /* cannot have negative values ! */
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/*if (color<0) color=0; // cannot have negative values ! */
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if (color > 255)
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color = 255;
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return (unsigned char) color;
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}
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static unsigned char
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gst_videoscale_bicubic (unsigned char *src, double x, double y, int sw, int sh)
|
|
{
|
|
int j = floor (x);
|
|
int k = floor (y), k2;
|
|
double a = x - j;
|
|
double b = y - k;
|
|
double dest;
|
|
int color;
|
|
double t1, t2, t3, t4;
|
|
double a1, a2, a3, a4;
|
|
|
|
GST_DEBUG_OBJECT (scale, "scaling bicubic %dx%d", sw, sh);
|
|
|
|
a1 = -a * (1 - a) * (1 - a);
|
|
a2 = (1 - 2 * a * a + a * a * a);
|
|
a3 = a * (1 + a - a * a);
|
|
a4 = a * a * (1 - a);
|
|
|
|
k2 = MAX (0, k - 1);
|
|
t1 = a1 * RC (j - 1, k2) + a2 * RC (j, k2) + a3 * RC (j + 1,
|
|
k2) - a4 * RC (j + 2, k2);
|
|
t2 = a1 * RC (j - 1, k) + a2 * RC (j, k) + a3 * RC (j + 1,
|
|
k) - a4 * RC (j + 2, k);
|
|
k2 = MIN (sh, k + 1);
|
|
t3 = a1 * RC (j - 1, k2) + a2 * RC (j, k2) + a3 * RC (j + 1,
|
|
k2) - a4 * RC (j + 2, k2);
|
|
k2 = MIN (sh, k + 2);
|
|
t4 = a1 * RC (j - 1, k2) + a2 * RC (j, k2) + a3 * RC (j + 1,
|
|
k2) - a4 * RC (j + 2, k2);
|
|
|
|
dest =
|
|
-b * (1 - b) * (1 - b) * t1 + (1 - 2 * b * b + b * b * b) * t2 + b * (1 +
|
|
b - b * b) * t3 + b * b * (b - 1) * t4;
|
|
|
|
color = rint (dest);
|
|
if (color < 0)
|
|
color = abs (color); /* cannot have negative values ! */
|
|
if (color > 255)
|
|
color = 255;
|
|
|
|
return (unsigned char) color;
|
|
}
|
|
|
|
static void
|
|
gst_videoscale_scale_plane_slow (GstVideoscale * scale, unsigned char *src,
|
|
unsigned char *dest, int sw, int sh, int dw, int dh)
|
|
{
|
|
double zoomx = ((double) dw) / (double) sw;
|
|
double zoomy = ((double) dh) / (double) sh;
|
|
double xr, yr;
|
|
int x, y;
|
|
|
|
GST_DEBUG_OBJECT (scale, "scale plane slow %dx%d %dx%d %g %g %p %p", sw, sh,
|
|
dw, dh, zoomx, zoomy, src, dest);
|
|
|
|
for (y = 0; y < dh; y++) {
|
|
yr = ((double) y) / zoomy;
|
|
for (x = 0; x < dw; x++) {
|
|
xr = ((double) x) / zoomx;
|
|
|
|
GST_DEBUG_OBJECT (scale, "scale plane slow %g %g %p", xr, yr,
|
|
(src + (int) (x) + (int) ((y) * sw)));
|
|
|
|
if (floor (xr) == xr && floor (yr) == yr) {
|
|
GST_DEBUG_OBJECT (scale, "scale plane %g %g %p %p", xr, yr,
|
|
(src + (int) (x) + (int) ((y) * sw)), dest);
|
|
*dest++ = RC (xr, yr);
|
|
} else {
|
|
*dest++ = scale->filter (src, xr, yr, sw, sh);
|
|
/**dest++ = gst_videoscale_bicubic(src, xr, yr, sw, sh); */
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#if 0
|
|
static void
|
|
gst_videoscale_scale_point_sample (GstVideoscale * scale, unsigned char *src,
|
|
unsigned char *dest, int sw, int sh, int dw, int dh)
|
|
{
|
|
int ypos, yinc, y;
|
|
int xpos, xinc, x;
|
|
int sum, xcount, ycount, loop;
|
|
unsigned char *srcp, *srcp2;
|
|
|
|
GST_DEBUG_OBJECT (scale, "scaling nearest point sample %p %p %d", src, dest,
|
|
dw);
|
|
|
|
ypos = 0x10000;
|
|
yinc = (sh << 16) / dh;
|
|
xinc = (sw << 16) / dw;
|
|
|
|
for (y = dh; y; y--) {
|
|
|
|
ycount = 1;
|
|
srcp = src;
|
|
while (ypos > 0x10000) {
|
|
ycount++;
|
|
ypos -= 0x10000;
|
|
src += sw;
|
|
}
|
|
|
|
xpos = 0x10000;
|
|
for (x = dw; x; x--) {
|
|
xcount = 0;
|
|
sum = 0;
|
|
while (xpos >= 0x10000L) {
|
|
loop = ycount;
|
|
srcp2 = srcp;
|
|
while (loop--) {
|
|
sum += *srcp2;
|
|
srcp2 += sw;
|
|
}
|
|
srcp++;
|
|
xcount++;
|
|
xpos -= 0x10000L;
|
|
}
|
|
*dest++ = sum / (xcount * ycount);
|
|
xpos += xinc;
|
|
}
|
|
|
|
ypos += yinc;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
gst_videoscale_scale_nearest (GstVideoscale * scale,
|
|
unsigned char *dest, unsigned char *src, int sw, int sh, int dw, int dh)
|
|
{
|
|
int ypos, yinc, y;
|
|
int xpos, xinc, x;
|
|
guchar *destp;
|
|
guchar *srcp;
|
|
|
|
GST_DEBUG_OBJECT (scale, "scaling nearest %p %p %d", src, dest, dw);
|
|
|
|
|
|
ypos = 0;
|
|
yinc = (sh << 16) / dh;
|
|
xinc = (sw << 16) / dw;
|
|
|
|
for (y = dh; y; y--) {
|
|
if (ypos >= 0x10000) {
|
|
src += (ypos >> 16) * sw;
|
|
ypos &= 0xffff;
|
|
}
|
|
|
|
xpos = 0;
|
|
|
|
srcp = src;
|
|
destp = dest;
|
|
|
|
for (x = dw; x; x--) {
|
|
if (xpos >= 0x10000) {
|
|
srcp += (xpos >> 16);
|
|
xpos &= 0xffff;
|
|
}
|
|
*destp++ = *srcp;
|
|
xpos += xinc;
|
|
}
|
|
dest += dw;
|
|
|
|
ypos += yinc;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_videoscale_scale_nearest_str2 (GstVideoscale * scale,
|
|
unsigned char *dest, unsigned char *src, int sw, int sh, int dw, int dh)
|
|
{
|
|
int ypos, yinc, y;
|
|
int xpos, xinc, x;
|
|
guchar *destp;
|
|
guchar *srcp;
|
|
|
|
GST_DEBUG_OBJECT (scale, "scaling nearest %p %p %d", src, dest, dw);
|
|
|
|
|
|
ypos = 0;
|
|
yinc = (sh << 16) / dh;
|
|
xinc = (sw << 16) / dw;
|
|
|
|
for (y = dh; y; y--) {
|
|
|
|
if (ypos >= 0x10000) {
|
|
src += (ypos >> 16) * sw * 2;
|
|
ypos &= 0xffff;
|
|
}
|
|
|
|
xpos = 0;
|
|
|
|
srcp = src;
|
|
destp = dest;
|
|
|
|
for (x = dw; x; x--) {
|
|
if (xpos >= 0x10000) {
|
|
srcp += (xpos >> 16) * 2;
|
|
xpos &= 0xffff;
|
|
}
|
|
*destp = *srcp;
|
|
destp += 2;
|
|
xpos += xinc;
|
|
}
|
|
dest += dw * 2;
|
|
|
|
ypos += yinc;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_videoscale_scale_nearest_str4 (GstVideoscale * scale,
|
|
unsigned char *dest, unsigned char *src, int sw, int sh, int dw, int dh)
|
|
{
|
|
int ypos, yinc, y;
|
|
int xpos, xinc, x;
|
|
guchar *destp;
|
|
guchar *srcp;
|
|
|
|
GST_DEBUG_OBJECT (scale, "scaling nearest %p %p %d", src, dest, dw);
|
|
|
|
|
|
ypos = 0;
|
|
yinc = (sh << 16) / dh;
|
|
xinc = (sw << 16) / dw;
|
|
|
|
for (y = dh; y; y--) {
|
|
|
|
if (ypos >= 0x10000) {
|
|
src += (ypos >> 16) * sw * 4;
|
|
ypos &= 0xffff;
|
|
}
|
|
|
|
xpos = 0;
|
|
|
|
srcp = src;
|
|
destp = dest;
|
|
|
|
for (x = dw; x; x--) {
|
|
if (xpos >= 0x10000) {
|
|
srcp += (xpos >> 16) * 4;
|
|
xpos &= 0xffff;
|
|
}
|
|
*destp = *srcp;
|
|
destp += 4;
|
|
xpos += xinc;
|
|
}
|
|
dest += dw * 4;
|
|
|
|
ypos += yinc;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_videoscale_scale_nearest_32bit (GstVideoscale * scale,
|
|
unsigned char *dest, unsigned char *src, int sw, int sh, int dw, int dh)
|
|
{
|
|
int ypos, yinc, y;
|
|
int xpos, xinc, x;
|
|
guchar *destp;
|
|
guchar *srcp;
|
|
|
|
GST_DEBUG_OBJECT (scale, "scaling nearest %p %p %d", src, dest, dw);
|
|
|
|
|
|
ypos = 0;
|
|
yinc = (sh << 16) / dh;
|
|
xinc = (sw << 16) / dw;
|
|
|
|
for (y = dh; y; y--) {
|
|
|
|
if (ypos >= 0x10000) {
|
|
src += (ypos >> 16) * sw * 4;
|
|
ypos &= 0xffff;
|
|
}
|
|
|
|
xpos = 0;
|
|
|
|
srcp = src;
|
|
destp = dest;
|
|
|
|
for (x = dw; x; x--) {
|
|
if (xpos >= 0x10000) {
|
|
srcp += (xpos >> 16) * 4;
|
|
xpos &= 0xffff;
|
|
}
|
|
*(guint32 *) destp = *(guint32 *) srcp;
|
|
destp += 4;
|
|
xpos += xinc;
|
|
}
|
|
dest += dw * 4;
|
|
|
|
ypos += yinc;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_videoscale_scale_nearest_24bit (GstVideoscale * scale,
|
|
unsigned char *dest, unsigned char *src, int sw, int sh, int dw, int dh)
|
|
{
|
|
int ypos, yinc, y;
|
|
int xpos, xinc, x;
|
|
guchar *destp;
|
|
guchar *srcp;
|
|
|
|
GST_DEBUG_OBJECT (scale, "scaling nearest %p %p %d", src, dest, dw);
|
|
|
|
|
|
ypos = 0;
|
|
yinc = (sh << 16) / dh;
|
|
xinc = (sw << 16) / dw;
|
|
|
|
for (y = dh; y; y--) {
|
|
|
|
if (ypos >= 0x10000) {
|
|
src += (ypos >> 16) * sw * 3;
|
|
ypos &= 0xffff;
|
|
}
|
|
|
|
xpos = 0;
|
|
|
|
srcp = src;
|
|
destp = dest;
|
|
|
|
for (x = dw; x; x--) {
|
|
if (xpos >= 0x10000) {
|
|
srcp += (xpos >> 16) * 3;
|
|
xpos &= 0xffff;
|
|
}
|
|
destp[0] = srcp[0];
|
|
destp[1] = srcp[1];
|
|
destp[2] = srcp[2];
|
|
destp += 3;
|
|
xpos += xinc;
|
|
}
|
|
dest += dw * 3;
|
|
|
|
ypos += yinc;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_videoscale_scale_nearest_16bit (GstVideoscale * scale,
|
|
unsigned char *dest, unsigned char *src, int sw, int sh, int dw, int dh)
|
|
{
|
|
int ypos, yinc, y;
|
|
int xpos, xinc, x;
|
|
guchar *destp;
|
|
guchar *srcp;
|
|
|
|
GST_DEBUG_OBJECT (scale, "scaling nearest %p %p %d", src, dest, dw);
|
|
|
|
|
|
ypos = 0;
|
|
yinc = (sh << 16) / dh;
|
|
xinc = (sw << 16) / dw;
|
|
|
|
for (y = dh; y; y--) {
|
|
|
|
if (ypos >= 0x10000) {
|
|
src += (ypos >> 16) * sw * 2;
|
|
ypos &= 0xffff;
|
|
}
|
|
|
|
xpos = 0;
|
|
|
|
srcp = src;
|
|
destp = dest;
|
|
|
|
for (x = dw; x; x--) {
|
|
if (xpos >= 0x10000) {
|
|
srcp += (xpos >> 16) * 2;
|
|
xpos &= 0xffff;
|
|
}
|
|
destp[0] = srcp[0];
|
|
destp[1] = srcp[1];
|
|
destp += 2;
|
|
xpos += xinc;
|
|
}
|
|
dest += dw * 2;
|
|
|
|
ypos += yinc;
|
|
}
|
|
}
|