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authorMichael Niedermayer <michaelni@gmx.at>2011-04-01 02:55:29 +0200
committerMichael Niedermayer <michaelni@gmx.at>2011-04-01 02:58:15 +0200
commit7ac167493e5404fd2d3f307d02127f23fca970f0 (patch)
treebea8a71cd59b1ea9a63692f7df1bdedb8446a9c1 /libavcodec/fft-internal.h
parent859676dd426e7051b41b174886e6e64271e93cdc (diff)
parente006d71fa849542eb27146efac629288703b3d75 (diff)
downloadffmpeg-7ac167493e5404fd2d3f307d02127f23fca970f0.tar.gz
Merge remote-tracking branch 'newdev/master'
* newdev/master: mpegts: propagate avio EOF in read_packet() configure: Initial support for --target-os=symbian Fixed-point FFT and MDCT Include dependencies for test programs ac3enc: simplify sym_quant() flvdec: read index stored in the 'keyframes' tag. mov: Add support for zero-sized stsc runs. Merged-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/fft-internal.h')
-rw-r--r--libavcodec/fft-internal.h67
1 files changed, 67 insertions, 0 deletions
diff --git a/libavcodec/fft-internal.h b/libavcodec/fft-internal.h
new file mode 100644
index 0000000000..ae76eafc4e
--- /dev/null
+++ b/libavcodec/fft-internal.h
@@ -0,0 +1,67 @@
+/*
+ * 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_FFT_INTERNAL_H
+#define AVCODEC_FFT_INTERNAL_H
+
+#if CONFIG_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 "libavutil/intmath.h"
+#include "mathops.h"
+
+#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 CMUL(dre, dim, are, aim, bre, bim) do { \
+ (dre) = (MUL16(are, bre) - MUL16(aim, bim)) >> 15; \
+ (dim) = (MUL16(are, bim) + MUL16(aim, bre)) >> 15; \
+ } while (0)
+
+#endif /* CONFIG_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 */