making act segmenter

1 files changed, 67 insertions, 0 deletions

diff --git a/ffmpeg/libavcodec/sinewin_tablegen.h b/ffmpeg/libavcodec/sinewin_tablegen.h
new file mode 100644
index 0000000..2b9c4f2
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+++ b/ffmpeg/libavcodec/sinewin_tablegen.h
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+/*
+ * Header file for hardcoded sine windows
+ *
+ * Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_SINEWIN_TABLEGEN_H
+#define AVCODEC_SINEWIN_TABLEGEN_H
+
+#include <assert.h>
+// do not use libavutil/libm.h since this is compiled both
+// for the host and the target and config.h is only valid for the target
+#include <math.h>
+#include "libavutil/attributes.h"
+#include "libavutil/common.h"
+
+#if !CONFIG_HARDCODED_TABLES
+SINETABLE(  32);
+SINETABLE(  64);
+SINETABLE( 128);
+SINETABLE( 256);
+SINETABLE( 512);
+SINETABLE(1024);
+SINETABLE(2048);
+SINETABLE(4096);
+SINETABLE(8192);
+#else
+#include "libavcodec/sinewin_tables.h"
+#endif
+
+SINETABLE_CONST float * const ff_sine_windows[] = {
+    NULL, NULL, NULL, NULL, NULL, // unused
+    ff_sine_32 , ff_sine_64 ,
+    ff_sine_128, ff_sine_256, ff_sine_512, ff_sine_1024, ff_sine_2048, ff_sine_4096, ff_sine_8192
+};
+
+// Generate a sine window.
+av_cold void ff_sine_window_init(float *window, int n) {
+    int i;
+    for(i = 0; i < n; i++)
+        window[i] = sinf((i + 0.5) * (M_PI / (2.0 * n)));
+}
+
+av_cold void ff_init_ff_sine_windows(int index) {
+    assert(index >= 0 && index < FF_ARRAY_ELEMS(ff_sine_windows));
+#if !CONFIG_HARDCODED_TABLES
+    ff_sine_window_init(ff_sine_windows[index], 1 << index);
+#endif
+}
+
+#endif /* AVCODEC_SINEWIN_TABLEGEN_H */