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-rw-r--r--media/libav/libavcodec/fft-internal.h75
1 files changed, 75 insertions, 0 deletions
diff --git a/media/libav/libavcodec/fft-internal.h b/media/libav/libavcodec/fft-internal.h
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+++ b/media/libav/libavcodec/fft-internal.h
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+/*
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_FFT_INTERNAL_H
+#define AVCODEC_FFT_INTERNAL_H
+
+#if FFT_FLOAT
+
+#define FIX15(v) (v)
+#define sqrthalf (float)M_SQRT1_2
+
+#define BF(x, y, a, b) do { \
+ x = a - b; \
+ y = a + b; \
+ } while (0)
+
+#define CMUL(dre, dim, are, aim, bre, bim) do { \
+ (dre) = (are) * (bre) - (aim) * (bim); \
+ (dim) = (are) * (bim) + (aim) * (bre); \
+ } while (0)
+
+#else
+
+#include "fft.h"
+#include "mathops.h"
+
+void ff_mdct_calcw_c(FFTContext *s, FFTDouble *output, const FFTSample *input);
+
+#define SCALE_FLOAT(a, bits) lrint((a) * (double)(1 << (bits)))
+#define FIX15(a) av_clip(SCALE_FLOAT(a, 15), -32767, 32767)
+
+#define sqrthalf ((int16_t)((1<<15)*M_SQRT1_2))
+
+#define BF(x, y, a, b) do { \
+ x = (a - b) >> 1; \
+ y = (a + b) >> 1; \
+ } while (0)
+
+#define CMULS(dre, dim, are, aim, bre, bim, sh) do { \
+ (dre) = (MUL16(are, bre) - MUL16(aim, bim)) >> sh; \
+ (dim) = (MUL16(are, bim) + MUL16(aim, bre)) >> sh; \
+ } while (0)
+
+#define CMUL(dre, dim, are, aim, bre, bim) \
+ CMULS(dre, dim, are, aim, bre, bim, 15)
+
+#define CMULL(dre, dim, are, aim, bre, bim) \
+ CMULS(dre, dim, are, aim, bre, bim, 0)
+
+#endif /* FFT_FLOAT */
+
+#define ff_imdct_calc_c FFT_NAME(ff_imdct_calc_c)
+#define ff_imdct_half_c FFT_NAME(ff_imdct_half_c)
+#define ff_mdct_calc_c FFT_NAME(ff_mdct_calc_c)
+
+void ff_imdct_calc_c(FFTContext *s, FFTSample *output, const FFTSample *input);
+void ff_imdct_half_c(FFTContext *s, FFTSample *output, const FFTSample *input);
+void ff_mdct_calc_c(FFTContext *s, FFTSample *output, const FFTSample *input);
+
+#endif /* AVCODEC_FFT_INTERNAL_H */