Tarball conversion

1 files changed, 54 insertions, 0 deletions

diff --git a/src/ima_oki_adpcm.h b/src/ima_oki_adpcm.h
new file mode 100644
index 0000000..86241e7
--- /dev/null
+++ b/src/ima_oki_adpcm.h
@@ -0,0 +1,54 @@
+/*
+** Copyright (C) 2007-2011 Erik de Castro Lopo <erikd@mega-nerd.com>
+** Copyright (c) 2007 <robs@users.sourceforge.net>
+**
+** This library 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 of the License, or (at
+** your option) any later version.
+**
+** This library 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 this library.  If not, write to the Free Software Foundation,
+** Fifth Floor, 51 Franklin Street, Boston, MA 02111-1301, USA.
+*/
+
+/* ADPCM: IMA, OKI <==> 16-bit PCM. */
+
+
+#define		IMA_OKI_ADPCM_CODE_LEN	256
+#define		IMA_OKI_ADPCM_PCM_LEN	(IMA_OKI_ADPCM_CODE_LEN *2)
+
+typedef struct
+{
+	/* private: */
+	int mask ;
+	int last_output ;
+	int step_index ;
+	int max_step_index ;
+	int const * steps ;
+
+	/* public: */
+	int errors ;
+	int	code_count, pcm_count ;
+
+	unsigned char	codes [IMA_OKI_ADPCM_CODE_LEN] ;
+	short 			pcm [IMA_OKI_ADPCM_PCM_LEN] ;
+} IMA_OKI_ADPCM ;
+
+typedef enum
+{	IMA_OKI_ADPCM_TYPE_IMA,
+	IMA_OKI_ADPCM_TYPE_OKI
+} IMA_OKI_ADPCM_TYPE ;
+
+void ima_oki_adpcm_init		(IMA_OKI_ADPCM * state, IMA_OKI_ADPCM_TYPE type) ;
+
+int	adpcm_decode	(IMA_OKI_ADPCM * state, int /* 0..15 */ code) ;
+int	adpcm_encode	(IMA_OKI_ADPCM * state, int /* -32768..32767 */ sample) ;
+
+void	ima_oki_adpcm_decode_block	(IMA_OKI_ADPCM * state) ;
+void	ima_oki_adpcm_encode_block	(IMA_OKI_ADPCM * state) ;