Change the AC-3 encoder to use floating-point.

Fixed-point AC-3 encoder renamed to ac3_fixed.
Regression test acodec-ac3 renamed to acodec-ac3_fixed.
Regression test lavf-rm changed to use ac3_fixed encoder.

Originally committed as revision 26209 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 46 insertions, 0 deletions

diff --git a/libavcodec/ac3enc_float.h b/libavcodec/ac3enc_float.h
new file mode 100644
index 0000000000..1cd3681ae9
--- /dev/null
+++ b/libavcodec/ac3enc_float.h
@@ -0,0 +1,46 @@
+/*
+ * The simplest AC-3 encoder
+ * Copyright (c) 2000 Fabrice Bellard
+ * Copyright (c) 2006-2010 Justin Ruggles <justin.ruggles@gmail.com>
+ * Copyright (c) 2006-2010 Prakash Punnoor <prakash@punnoor.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
+ */
+
+/**
+ * @file
+ * floating-point AC-3 encoder header.
+ */
+
+#ifndef AVCODEC_AC3ENC_FLOAT_H
+#define AVCODEC_AC3ENC_FLOAT_H
+
+#include "fft.h"
+
+
+typedef float SampleType;
+typedef float CoefType;
+
+#define SCALE_COEF(a) SCALE_FLOAT((a), 24)
+
+
+typedef struct AC3MDCTContext {
+    const float *window;    ///< MDCT window function
+    FFTContext fft;         ///< FFT context for MDCT calculation
+} AC3MDCTContext;
+
+#endif /* AVCODEC_AC3ENC_FLOAT_H */