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128 lines
3.3 KiB
C
128 lines
3.3 KiB
C
/* Gnome-Streamer
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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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#include <config.h>
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#include <gst/gst.h>
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#include "gstidct.h"
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#include "dct.h"
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static void gst_idct_int_sparse_idct(short *data);
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GstIDCT *gst_idct_new(GstIDCTMethod method)
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{
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GstIDCT *new = g_malloc(sizeof(GstIDCT));
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new->need_transpose = FALSE;
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if (method == GST_IDCT_DEFAULT) {
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#ifdef HAVE_LIBMMX
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if (gst_cpu_get_flags() & GST_CPU_FLAG_MMX) {
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method = GST_IDCT_MMX;
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}
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/* disabled for now
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if (gst_cpu_get_flags() & GST_CPU_FLAG_SSE) {
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method = GST_IDCT_SSE;
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}
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*/
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else
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#endif /* HAVE_LIBMMX */
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{
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method = GST_IDCT_FAST_INT;
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}
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}
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new->convert_sparse = gst_idct_int_sparse_idct;
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switch (method) {
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case GST_IDCT_FAST_INT:
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GST_INFO (GST_CAT_PLUGIN_INFO, "using fast_int_idct");
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gst_idct_init_fast_int_idct();
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new->convert = gst_idct_fast_int_idct;
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break;
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case GST_IDCT_INT:
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GST_INFO (GST_CAT_PLUGIN_INFO, "using int_idct");
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new->convert = gst_idct_int_idct;
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break;
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case GST_IDCT_FLOAT:
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GST_INFO (GST_CAT_PLUGIN_INFO, "using float_idct");
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gst_idct_init_float_idct();
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new->convert = gst_idct_float_idct;
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break;
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#ifdef HAVE_LIBMMX
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case GST_IDCT_MMX:
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GST_INFO (GST_CAT_PLUGIN_INFO, "using MMX_idct");
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new->convert = gst_idct_mmx_idct;
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new->need_transpose = TRUE;
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break;
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case GST_IDCT_MMX32:
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GST_INFO (GST_CAT_PLUGIN_INFO, "using MMX32_idct");
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new->convert = gst_idct_mmx32_idct;
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new->need_transpose = TRUE;
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break;
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case GST_IDCT_SSE:
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GST_INFO (GST_CAT_PLUGIN_INFO, "using SSE_idct");
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new->convert = gst_idct_sse_idct;
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new->need_transpose = TRUE;
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break;
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#endif /* HAVE_LIBMMX */
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default:
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GST_INFO (GST_CAT_PLUGIN_INFO, "method not supported");
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g_free(new);
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return NULL;
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}
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return new;
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}
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static void gst_idct_int_sparse_idct(short *data)
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{
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short val;
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gint32 v, *dp = (guint32 *)data;
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v = *data;
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if (v < 0) {
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val = -v;
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val += (8 >> 1);
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val /= 8;
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val = -val;
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}
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else {
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val = (v + (8 >> 1)) / 8;
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}
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v = (( val & 0xffff) | (val << 16));
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dp[0] = v; dp[1] = v; dp[2] = v; dp[3] = v;
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dp[4] = v; dp[5] = v; dp[6] = v; dp[7] = v;
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dp[8] = v; dp[9] = v; dp[10] = v; dp[11] = v;
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dp[12] = v; dp[13] = v; dp[14] = v; dp[15] = v;
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dp[16] = v; dp[17] = v; dp[18] = v; dp[19] = v;
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dp[20] = v; dp[21] = v; dp[22] = v; dp[23] = v;
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dp[24] = v; dp[25] = v; dp[26] = v; dp[27] = v;
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dp[28] = v; dp[29] = v; dp[30] = v; dp[31] = v;
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}
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void gst_idct_destroy(GstIDCT *idct)
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{
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g_return_if_fail(idct != NULL);
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g_free(idct);
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}
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