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** Copyright (C) 1999-2001 Erik de Castro Lopo <erikd@mega-nerd.com>
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** Copyright (C) 1999-2005 Erik de Castro Lopo <erikd@mega-nerd.com>
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** This program is free software; you can redistribute it and/or modify
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** it under the terms of the GNU Lesser General Public License as published by
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** the Free Software Foundation; either version 2.1 of the License, or
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** (at your option) any later version.
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU Lesser General Public License for more details.
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** You should have received a copy of the GNU Lesser General Public License
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** along with this program; if not, write to the Free Software
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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** This file is not the same as the original file from Sun Microsystems. Nearly
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** all the original definitions and function prototypes that were in the file
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** of this name have been moved to private.h.
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** all the original definitions and function prototypes that were in the file
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** of this name have been moved to g72x_priv.h.
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#ifndef G72X_HEADER_FILE
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#define G72X_HEADER_FILE
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** Number of samples per block to process.
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** Number of samples per block to process.
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** Must be a common multiple of possible bits per sample : 2, 3, 4, 5 and 8.
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#define G72x_BLOCK_SIZE (3*5*8)
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#define G72x_BLOCK_SIZE (3 * 5 * 8)
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** Identifiers for the differing kinds of G72x ADPCM codecs.
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** The identifiers also define the number of encoded bits per sample.
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{ G723_16_BITS_PER_SAMPLE = 2,
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G723_24_BITS_PER_SAMPLE = 3,
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G723_40_BITS_PER_SAMPLE = 5,
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G723_24_BITS_PER_SAMPLE = 3,
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G723_40_BITS_PER_SAMPLE = 5,
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G721_32_BITS_PER_SAMPLE = 4,
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G721_40_BITS_PER_SAMPLE = 5,
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G723_16_SAMPLES_PER_BLOCK = G72x_BLOCK_SIZE,
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G723_24_SAMPLES_PER_BLOCK = G723_24_BITS_PER_SAMPLE * (G72x_BLOCK_SIZE / G723_24_BITS_PER_SAMPLE),
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G723_40_SAMPLES_PER_BLOCK = G723_40_BITS_PER_SAMPLE * (G72x_BLOCK_SIZE / G723_40_BITS_PER_SAMPLE),
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G723_24_SAMPLES_PER_BLOCK = G723_24_BITS_PER_SAMPLE * (G72x_BLOCK_SIZE / G723_24_BITS_PER_SAMPLE),
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G723_40_SAMPLES_PER_BLOCK = G723_40_BITS_PER_SAMPLE * (G72x_BLOCK_SIZE / G723_40_BITS_PER_SAMPLE),
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G721_32_SAMPLES_PER_BLOCK = G72x_BLOCK_SIZE,
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G721_40_SAMPLES_PER_BLOCK = G721_40_BITS_PER_SAMPLE * (G72x_BLOCK_SIZE / G721_40_BITS_PER_SAMPLE),
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G721_32_BYTES_PER_BLOCK = (G721_32_BITS_PER_SAMPLE * G72x_BLOCK_SIZE) / 8,
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G721_40_BYTES_PER_BLOCK = (G721_40_BITS_PER_SAMPLE * G72x_BLOCK_SIZE) / 8
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** This is the public structure for passing data between the caller and
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** the G72x encoder and decoder.
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** The private array is used by the encoder and decoder for internal
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** state information and should not be changed in any way by the caller.
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** When decoding or encoding a stream, the same instance of this struct
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** should be used for every call so that the decoder/encoder keeps the
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** correct state data between calls.
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{ /* Private data. Don't mess with it. */
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unsigned long private [256 / sizeof (long)] ;
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/* Public data. Read only. */
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int blocksize, max_bytes, samplesperblock, bytesperblock ;
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/* Public data. Read and write. */
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int blocks, blockcount, samplecount ;
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unsigned char block [G72x_BLOCK_SIZE] ;
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short samples [G72x_BLOCK_SIZE] ;
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/* Forward declaration of of g72x_state. */
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/* External function definitions. */
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int g72x_reader_init (G72x_DATA *data, int codec) ;
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int g72x_writer_init (G72x_DATA *data, int codec) ;
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struct g72x_state * g72x_reader_init (int codec, int *blocksize, int *samplesperblock) ;
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struct g72x_state * g72x_writer_init (int codec, int *blocksize, int *samplesperblock) ;
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** Initialize the ADPCM state table for the given codec.
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** Return 0 on success, 1 on fail.
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int g72x_decode_block (G72x_DATA *data) ;
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int g72x_decode_block (struct g72x_state *pstate, const unsigned char *block, short *samples) ;
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** The caller fills data->block with data->bytes bytes before calling the
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** function. The value data->bytes must be an integer multiple of
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** The caller fills data->block with data->bytes bytes before calling the
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** function. The value data->bytes must be an integer multiple of
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** data->blocksize and be <= data->max_bytes.
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** When it returns, the caller can read out data->samples samples.
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** When it returns, the caller can read out data->samples samples.
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int g72x_encode_block (G72x_DATA *data) ;
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int g72x_encode_block (struct g72x_state *pstate, short *samples, unsigned char *block) ;
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** The caller fills state->samples some integer multiple data->samples_per_block
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** (up to G72x_BLOCK_SIZE) samples before calling the function.
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** When it returns, the caller can read out bytes encoded bytes.
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** When it returns, the caller can read out bytes encoded bytes.
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#endif /* !G72X_HEADER_FILE */
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** Do not edit or modify anything in this comment block.
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** The arch-tag line is a file identity tag for the GNU Arch
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** The arch-tag line is a file identity tag for the GNU Arch
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** revision control system.
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** arch-tag: 6ca84e5f-f932-4ba1-87ee-37056d921621