libsndfile source files.

[Faustine.git] / interpretor / libsndfile-1.0.25 / src / G72x / g72x.h

diff --git a/interpretor/libsndfile-1.0.25/src/G72x/g72x.h b/interpretor/libsndfile-1.0.25/src/G72x/g72x.h
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+++ b/interpretor/libsndfile-1.0.25/src/G72x/g72x.h
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+/*
+** Copyright (C) 1999-2011 Erik de Castro Lopo <erikd@mega-nerd.com>
+**
+** This program 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.
+**
+** This program 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 program; if not, write to the Free Software
+** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+
+/*
+** This file is not the same as the original file from Sun Microsystems. Nearly
+** all the original definitions and function prototypes that were in the file
+** of this name have been moved to g72x_priv.h.
+*/
+
+#ifndef G72X_HEADER_FILE
+#define        G72X_HEADER_FILE
+
+/*
+** Number of samples per block to process.
+** Must be a common multiple of possible bits per sample : 2, 3, 4, 5 and 8.
+*/
+#define        G72x_BLOCK_SIZE         (3 * 5 * 8)
+
+/*
+**     Identifiers for the differing kinds of G72x ADPCM codecs.
+**     The identifiers also define the number of encoded bits per sample.
+*/
+
+enum
+{      G723_16_BITS_PER_SAMPLE = 2,
+       G723_24_BITS_PER_SAMPLE = 3,
+       G723_40_BITS_PER_SAMPLE = 5,
+
+       G721_32_BITS_PER_SAMPLE = 4,
+       G721_40_BITS_PER_SAMPLE = 5,
+
+       G723_16_SAMPLES_PER_BLOCK = G72x_BLOCK_SIZE,
+       G723_24_SAMPLES_PER_BLOCK = G723_24_BITS_PER_SAMPLE * (G72x_BLOCK_SIZE / G723_24_BITS_PER_SAMPLE),
+       G723_40_SAMPLES_PER_BLOCK = G723_40_BITS_PER_SAMPLE * (G72x_BLOCK_SIZE / G723_40_BITS_PER_SAMPLE),
+
+       G721_32_SAMPLES_PER_BLOCK = G72x_BLOCK_SIZE,
+       G721_40_SAMPLES_PER_BLOCK = G721_40_BITS_PER_SAMPLE * (G72x_BLOCK_SIZE / G721_40_BITS_PER_SAMPLE),
+
+       G723_16_BYTES_PER_BLOCK = (G723_16_BITS_PER_SAMPLE * G72x_BLOCK_SIZE) / 8,
+       G723_24_BYTES_PER_BLOCK = (G723_24_BITS_PER_SAMPLE * G72x_BLOCK_SIZE) / 8,
+       G723_40_BYTES_PER_BLOCK = (G723_40_BITS_PER_SAMPLE * G72x_BLOCK_SIZE) / 8,
+
+       G721_32_BYTES_PER_BLOCK = (G721_32_BITS_PER_SAMPLE * G72x_BLOCK_SIZE) / 8,
+       G721_40_BYTES_PER_BLOCK = (G721_40_BITS_PER_SAMPLE * G72x_BLOCK_SIZE) / 8
+} ;
+
+/* Forward declaration of of g72x_state. */
+
+struct g72x_state ;
+
+/* External function definitions. */
+
+struct g72x_state * g72x_reader_init (int codec, int *blocksize, int *samplesperblock) ;
+struct g72x_state * g72x_writer_init (int codec, int *blocksize, int *samplesperblock) ;
+/*
+**     Initialize the ADPCM state table for the given codec.
+**     Return 0 on success, 1 on fail.
+*/
+
+int g72x_decode_block (struct g72x_state *pstate, const unsigned char *block, short *samples) ;
+/*
+**     The caller fills data->block with data->bytes bytes before calling the
+**     function. The value data->bytes must be an integer multiple of
+**     data->blocksize and be <= data->max_bytes.
+**     When it returns, the caller can read out data->samples samples.
+*/
+
+int g72x_encode_block (struct g72x_state *pstate, short *samples, unsigned char *block) ;
+/*
+**     The caller fills state->samples some integer multiple data->samples_per_block
+**     (up to G72x_BLOCK_SIZE) samples before calling the function.
+**     When it returns, the caller can read out bytes encoded bytes.
+*/
+
+#endif /* !G72X_HEADER_FILE */
+