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Add codecs to librbcodec.

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Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97
Reviewed-on: http://gerrit.rockbox.org/137
Reviewed-by: Nils Wallménius <nils@rockbox.org>
Tested-by: Nils Wallménius <nils@rockbox.org>
This commit is contained in:
Sean Bartell 2011-06-25 21:32:25 -04:00 • committed by Nils Wallménius
parent a0009907de
commit f40bfc9267
757 changed files with 122 additions and 122 deletions
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47
lib/rbcodec/codecs/libwavpack/float.c Normal file
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////////////////////////////////////////////////////////////////////////////
// **** WAVPACK **** //
// Hybrid Lossless Wavefile Compressor //
// Copyright (c) 1998 - 2004 Conifer Software. //
// All Rights Reserved. //
// Distributed under the BSD Software License (see license.txt) //
////////////////////////////////////////////////////////////////////////////
// float.c
#include "wavpack.h"
int read_float_info (WavpackStream *wps, WavpackMetadata *wpmd)
{
int bytecnt = wpmd->byte_length;
char *byteptr = wpmd->data;
if (bytecnt != 4)
return FALSE;
wps->float_flags = *byteptr++;
wps->float_shift = *byteptr++;
wps->float_max_exp = *byteptr++;
wps->float_norm_exp = *byteptr;
return TRUE;
}
/* This function converts WavPack floating point data into standard Rockbox
* 28-bit integers. It is assumed that clipping will be taken care of later.
*/
void float_values (WavpackStream *wps, int32_t *values, int32_t num_values)
{
int shift = wps->float_max_exp - wps->float_norm_exp + wps->float_shift + 5;
if (shift > 32)
shift = 32;
else if (shift < -32)
shift = -32;
if (shift > 0)
while (num_values--)
*values++ <<= shift;
else if (shift < 0)
while (num_values--)
*values++ >>= -shift;
}