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Fixed mp3 codec issues

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ADDED:
code/client/snd_codec_mp3.c
code/libmad/mad.h
code/libs/win32/libmad.a
code/libs/win32/libmad.dll.a
code/libs/win32/libmad.la
code/libs/win64/libmad.a
code/libs/win64/libmad.dll.a
code/libs/win64/libmad.la
This commit is contained in:
Walter Julius Hennecke 2012-01-22 23:27:39 +01:00
parent 344ecbba31
commit 858dc0c831
8 changed files with 1750 additions and 0 deletions
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716
code/client/snd_codec_mp3.c Normal file
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/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.
Copyright (C) 2005 Stuart Dalton (badcdev@gmail.com)
Copyright (C) 2005-2006 Joerg Dietrich <dietrich_joerg@gmx.de>
Copyright (C) 2006 Thilo Schulz <arny@ats.s.bawue.de>
This file is part of Quake III Arena source code.
Quake III Arena source code is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
Quake III Arena source code 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with Quake III Arena source code; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
===========================================================================
*/
// MP3 support is enabled by this define
#if USE_CODEC_MP3
// includes for the Q3 sound system
#include "client.h"
#include "snd_codec.h"
// includes for the MP3 codec
#include "../libmad/mad.h"
#define MP3_SAMPLE_WIDTH 2
#define MP3_PCMSAMPLES_PERSLICE 32
// buffer size used when reading through the mp3
#define MP3_DATA_BUFSIZ 128*1024
// undefine this if you don't want any dithering.
#define MP3_DITHERING
// Q3 MP3 codec
snd_codec_t mp3_codec =
{
".mp3",
S_MP3_CodecLoad,
S_MP3_CodecOpenStream,
S_MP3_CodecReadStream,
S_MP3_CodecCloseStream,
NULL
};
// structure used for info purposes
struct snd_codec_mp3_info
{
byte encbuf[MP3_DATA_BUFSIZ]; // left over bytes not consumed
// by the decoder.
struct mad_stream madstream; // uses encbuf as buffer.
struct mad_frame madframe; // control structures for libmad.
struct mad_synth madsynth;
byte *pcmbuf; // buffer for not-used samples.
int buflen; // length of buffer data.
int pcmbufsize; // amount of allocated memory for
// pcmbuf. This should have at least
// the size of a decoded mp3 frame.
byte *dest; // copy decoded data here.
int destlen; // amount of already copied data.
int destsize; // amount of bytes we must decode.
};
/*************** MP3 utility functions ***************/
/*
=================
S_MP3_ReadData
=================
*/
// feed libmad with data
int S_MP3_ReadData(snd_stream_t *stream, struct mad_stream *madstream, byte *encbuf, int encbufsize)
{
int retval;
int leftover;
if(!stream)
return -1;
leftover = madstream->bufend - madstream->next_frame;
if(leftover > 0)
memmove(encbuf, madstream->this_frame, leftover);
// Fill the buffer right to the end
retval = FS_Read(&encbuf[leftover], encbufsize - leftover, stream->file);
if(retval <= 0)
{
// EOF reached, that's ok.
return 0;
}
mad_stream_buffer(madstream, encbuf, retval + leftover);
return retval;
}
/*
=================
S_MP3_Scanfile
to determine the samplecount, we apparently must get *all* headers :(
I basically used the xmms-mad plugin source to see how this stuff works.
returns a value < 0 on error.
=================
*/
int S_MP3_Scanfile(snd_stream_t *stream)
{
struct mad_stream madstream;
struct mad_header madheader;
int retval;
int samplecount;
byte encbuf[MP3_DATA_BUFSIZ];
// error out on invalid input.
if(!stream)
return -1;
mad_stream_init(&madstream);
mad_header_init(&madheader);
while(1)
{
retval = S_MP3_ReadData(stream, &madstream, encbuf, sizeof(encbuf));
if(retval < 0)
return -1;
else if(retval == 0)
break;
// Start decoding the headers.
while(1)
{
if((retval = mad_header_decode(&madheader, &madstream)) < 0)
{
if(madstream.error == MAD_ERROR_BUFLEN)
{
// We need to read more data
break;
}
if(!MAD_RECOVERABLE (madstream.error))
{
// unrecoverable error... we must bail out.
return retval;
}
mad_stream_skip(&madstream, madstream.skiplen);
continue;
}
// we got a valid header.
if(madheader.layer != MAD_LAYER_III)
{
// we don't support non-mp3s
return -1;
}
if(!stream->info.samples)
{
// This here is the very first frame. Set initial values now,
// that we expect to stay constant throughout the whole mp3.
stream->info.rate = madheader.samplerate;
stream->info.width = MP3_SAMPLE_WIDTH;
stream->info.channels = MAD_NCHANNELS(&madheader);
stream->info.samples = 0;
stream->info.size = 0; // same here.
stream->info.dataofs = 0;
}
else
{
// Check whether something changed that shouldn't.
if(stream->info.rate != madheader.samplerate ||
stream->info.channels != MAD_NCHANNELS(&madheader))
return -1;
}
// Update the counters
samplecount = MAD_NSBSAMPLES(&madheader) * MP3_PCMSAMPLES_PERSLICE;
stream->info.samples += samplecount;
stream->info.size += samplecount * stream->info.channels * stream->info.width;
}
}
// Reset the file pointer so we can do the real decoding.
FS_Seek(stream->file, 0, FS_SEEK_SET);
return 0;
}
/************************ dithering functions ***************************/
#ifdef MP3_DITHERING
// All dithering done here is taken from the GPL'ed xmms-mad plugin.
/* Copyright (C) 1997 Makoto Matsumoto and Takuji Nishimura. */
/* Any feedback is very welcome. For any question, comments, */
/* see http://www.math.keio.ac.jp/matumoto/emt.html or email */
/* matumoto@math.keio.ac.jp */
/* Period parameters */
#define MP3_DITH_N 624
#define MP3_DITH_M 397
#define MATRIX_A 0x9908b0df /* constant vector a */
#define UPPER_MASK 0x80000000 /* most significant w-r bits */
#define LOWER_MASK 0x7fffffff /* least significant r bits */
/* Tempering parameters */
#define TEMPERING_MASK_B 0x9d2c5680
#define TEMPERING_MASK_C 0xefc60000
#define TEMPERING_SHIFT_U(y) (y >> 11)
#define TEMPERING_SHIFT_S(y) (y << 7)
#define TEMPERING_SHIFT_T(y) (y << 15)
#define TEMPERING_SHIFT_L(y) (y >> 18)
static unsigned long mt[MP3_DITH_N]; /* the array for the state vector */
static int mti=MP3_DITH_N+1; /* mti==MP3_DITH_N+1 means mt[MP3_DITH_N] is not initialized */
/* initializing the array with a NONZERO seed */
void sgenrand(unsigned long seed)
{
/* setting initial seeds to mt[MP3_DITH_N] using */
/* the generator Line 25 of Table 1 in */
/* [KNUTH 1981, The Art of Computer Programming */
/* Vol. 2 (2nd Ed.), pp102] */
mt[0]= seed & 0xffffffff;
for (mti=1; mti<MP3_DITH_N; mti++)
mt[mti] = (69069 * mt[mti-1]) & 0xffffffff;
}
unsigned long genrand(void)
{
unsigned long y;
static unsigned long mag01[2]={0x0, MATRIX_A};
/* mag01[x] = x * MATRIX_A for x=0,1 */
if (mti >= MP3_DITH_N) { /* generate MP3_DITH_N words at one time */
int kk;
if (mti == MP3_DITH_N+1) /* if sgenrand() has not been called, */
sgenrand(4357); /* a default initial seed is used */
for (kk=0;kk<MP3_DITH_N-MP3_DITH_M;kk++) {
y = (mt[kk]&UPPER_MASK)|(mt[kk+1]&LOWER_MASK);
mt[kk] = mt[kk+MP3_DITH_M] ^ (y >> 1) ^ mag01[y & 0x1];
}
for (;kk<MP3_DITH_N-1;kk++) {
y = (mt[kk]&UPPER_MASK)|(mt[kk+1]&LOWER_MASK);
mt[kk] = mt[kk+(MP3_DITH_M-MP3_DITH_N)] ^ (y >> 1) ^ mag01[y & 0x1];
}
y = (mt[MP3_DITH_N-1]&UPPER_MASK)|(mt[0]&LOWER_MASK);
mt[MP3_DITH_N-1] = mt[MP3_DITH_M-1] ^ (y >> 1) ^ mag01[y & 0x1];
mti = 0;
}
y = mt[mti++];
y ^= TEMPERING_SHIFT_U(y);
y ^= TEMPERING_SHIFT_S(y) & TEMPERING_MASK_B;
y ^= TEMPERING_SHIFT_T(y) & TEMPERING_MASK_C;
y ^= TEMPERING_SHIFT_L(y);
return y;
}
long triangular_dither_noise(int nbits) {
// parameter nbits : the peak-to-peak amplitude desired (in bits)
// use with nbits set to 2 + nber of bits to be trimmed.
// (because triangular is made from two uniformly distributed processes,
// it starts at 2 bits peak-to-peak amplitude)
// see The Theory of Dithered Quantization by Robert Alexander Wannamaker
// for complete proof of why that's optimal
long v = (genrand()/2 - genrand()/2); // in ]-2^31, 2^31[
//int signe = (v>0) ? 1 : -1;
long P = 1 << (32 - nbits); // the power of 2
v /= P;
// now v in ]-2^(nbits-1), 2^(nbits-1) [
return v;
}
#endif // MP3_DITHERING
/************************ decoder functions ***************************/
/*
=================
S_MP3_Scale
Converts the signal to 16 bit LE-PCM data and does dithering.
- borrowed from xmms-mad plugin source.
=================
*/
/*
* xmms-mad - mp3 plugin for xmms
* Copyright (C) 2001-2002 Sam Clegg
*/
signed int S_MP3_Scale(mad_fixed_t sample)
{
int n_bits_to_loose = MAD_F_FRACBITS + 1 - 16;
#ifdef MP3_DITHERING
int dither;
#endif
// round
sample += (1L << (n_bits_to_loose - 1));
#ifdef MP3_DITHERING
dither = triangular_dither_noise(n_bits_to_loose + 1);
sample += dither;
#endif
/* clip */
if (sample >= MAD_F_ONE)
sample = MAD_F_ONE - 1;
else if (sample < -MAD_F_ONE)
sample = -MAD_F_ONE;
/* quantize */
return sample >> n_bits_to_loose;
}
/*
=================
S_MP3_PCMCopy
Copy and convert pcm data until bytecount bytes have been written.
return the position in pcm->samples.
indicate the amount of actually written bytes in wrotecnt.
=================
*/
int S_MP3_PCMCopy(byte *buf, struct mad_pcm *pcm, int bufofs,
int sampleofs, int bytecount, int *wrotecnt)
{
int written = 0;
signed int sample;
int framesize = pcm->channels * MP3_SAMPLE_WIDTH;
// add new pcm data.
while(written < bytecount && sampleofs < pcm->length)
{
sample = S_MP3_Scale(pcm->samples[0][sampleofs]);
#ifdef Q3_BIG_ENDIAN
// output to 16 bit big endian PCM
buf[bufofs++] = (sample >> 8) & 0xff;
buf[bufofs++] = sample & 0xff;
#else
// output to 16 bit little endian PCM
buf[bufofs++] = sample & 0xff;
buf[bufofs++] = (sample >> 8) & 0xff;
#endif
if(pcm->channels == 2)
{
sample = S_MP3_Scale(pcm->samples[1][sampleofs]);
#ifdef Q3_BIG_ENDIAN
buf[bufofs++] = (sample >> 8) & 0xff;
buf[bufofs++] = sample & 0xff;
#else
buf[bufofs++] = sample & 0xff;
buf[bufofs++] = (sample >> 8) & 0xff;
#endif
}
sampleofs++;
written += framesize;
}
if(wrotecnt)
*wrotecnt = written;
return sampleofs;
}
/*
=================
S_MP3_Decode
=================
*/
// gets executed for every decoded frame.
int S_MP3_Decode(snd_stream_t *stream)
{
struct snd_codec_mp3_info *mp3info;
struct mad_stream *madstream;
struct mad_frame *madframe;
struct mad_synth *madsynth;
struct mad_pcm *pcm;
int cursize;
int samplecount;
int needcount;
int wrote;
int retval;
if(!stream)
return -1;
mp3info = stream->ptr;
madstream = &mp3info->madstream;
madframe = &mp3info->madframe;
if(mad_frame_decode(madframe, madstream))
{
if(madstream->error == MAD_ERROR_BUFLEN)
{
// we need more data. Read another chunk.
retval = S_MP3_ReadData(stream, madstream, mp3info->encbuf, sizeof(mp3info->encbuf));
// call myself again now that buffer is full.
if(retval > 0)
retval = S_MP3_Decode(stream);
}
else if(MAD_RECOVERABLE(madstream->error))
{
mad_stream_skip(madstream, madstream->skiplen);
return S_MP3_Decode(stream);
}
else
retval = -1;
return retval;
}
// check whether this really is an mp3
if(madframe->header.layer != MAD_LAYER_III)
return -1;
// generate pcm data
madsynth = &mp3info->madsynth;
mad_synth_frame(madsynth, madframe);
pcm = &madsynth->pcm;
// perform a few checks to see whether something changed that shouldn't.
if(stream->info.rate != pcm->samplerate ||
stream->info.channels != pcm->channels)
{
return -1;
}
// see whether we have got enough data now.
cursize = pcm->length * pcm->channels * stream->info.width;
needcount = mp3info->destsize - mp3info->destlen;
// Copy exactly as many samples as required.
samplecount = S_MP3_PCMCopy(mp3info->dest, pcm,
mp3info->destlen, 0, needcount, &wrote);
mp3info->destlen += wrote;
if(samplecount < pcm->length)
{
// Not all samples got copied. Copy the rest into the pcm buffer.
samplecount = S_MP3_PCMCopy(mp3info->pcmbuf, pcm,
mp3info->buflen,
samplecount,
mp3info->pcmbufsize - mp3info->buflen,
&wrote);
mp3info->buflen += wrote;
if(samplecount < pcm->length)
{
// The pcm buffer was not large enough. Make it bigger.
byte *newbuf = Z_Malloc(cursize);
if(mp3info->pcmbuf)
{
memcpy(newbuf, mp3info->pcmbuf, mp3info->buflen);
Z_Free(mp3info->pcmbuf);
}
mp3info->pcmbuf = newbuf;
mp3info->pcmbufsize = cursize;
samplecount = S_MP3_PCMCopy(mp3info->pcmbuf, pcm,
mp3info->buflen,
samplecount,
mp3info->pcmbufsize - mp3info->buflen,
&wrote);
mp3info->buflen += wrote;
}
// we're definitely done.
retval = 0;
}
else if(mp3info->destlen >= mp3info->destsize)
retval = 0;
else
retval = 1;
return retval;
}
/*************** Callback functions for quake3 ***************/
/*
=================
S_MP3_CodecOpenStream
=================
*/
snd_stream_t *S_MP3_CodecOpenStream(const char *filename)
{
snd_stream_t *stream;
struct snd_codec_mp3_info *mp3info;
// Open the stream
stream = S_CodecUtilOpen(filename, &mp3_codec);
if(!stream || stream->length <= 0)
return NULL;
// We have to scan through the MP3 to determine the important mp3 info.
if(S_MP3_Scanfile(stream) < 0)
{
// scanning didn't work out...
S_CodecUtilClose(&stream);
return NULL;
}
// Initialize the mp3 info structure we need for streaming
mp3info = Z_Malloc(sizeof(*mp3info));
if(!mp3info)
{
S_CodecUtilClose(&stream);
return NULL;
}
stream->ptr = mp3info;
// initialize the libmad control structures.
mad_stream_init(&mp3info->madstream);
mad_frame_init(&mp3info->madframe);
mad_synth_init(&mp3info->madsynth);
if(S_MP3_ReadData(stream, &mp3info->madstream, mp3info->encbuf, sizeof(mp3info->encbuf)) <= 0)
{
// we didnt read anything, that's bad.
S_MP3_CodecCloseStream(stream);
return NULL;
}
return stream;
}
/*
=================
S_MP3_CodecCloseStream
=================
*/
// free all memory we allocated.
void S_MP3_CodecCloseStream(snd_stream_t *stream)
{
struct snd_codec_mp3_info *mp3info;
if(!stream)
return;
// free all data in our mp3info tree
if(stream->ptr)
{
mp3info = stream->ptr;
if(mp3info->pcmbuf)
Z_Free(mp3info->pcmbuf);
mad_synth_finish(&mp3info->madsynth);
mad_frame_finish(&mp3info->madframe);
mad_stream_finish(&mp3info->madstream);
Z_Free(stream->ptr);
}
S_CodecUtilClose(&stream);
}
/*
=================
S_MP3_CodecReadStream
=================
*/
int S_MP3_CodecReadStream(snd_stream_t *stream, int bytes, void *buffer)
{
struct snd_codec_mp3_info *mp3info;
int retval;
if(!stream)
return -1;
mp3info = stream->ptr;
// Make sure we get complete frames all the way through.
bytes -= bytes % (stream->info.channels * stream->info.width);
if(mp3info->buflen)
{
if(bytes < mp3info->buflen)
{
// we still have enough bytes in our decoded pcm buffer
memcpy(buffer, mp3info->pcmbuf, bytes);
// remove the portion from our buffer.
mp3info->buflen -= bytes;
memmove(mp3info->pcmbuf, &mp3info->pcmbuf[bytes], mp3info->buflen);
return bytes;
}
else
{
// copy over the samples we already have.
memcpy(buffer, mp3info->pcmbuf, mp3info->buflen);
mp3info->destlen = mp3info->buflen;
mp3info->buflen = 0;
}
}
else
mp3info->destlen = 0;
mp3info->dest = buffer;
mp3info->destsize = bytes;
do
{
retval = S_MP3_Decode(stream);
} while(retval > 0);
// if there was an error return nothing.
if(retval < 0)
return 0;
return mp3info->destlen;
}
/*
=====================================================================
S_MP3_CodecLoad
We handle S_MP3_CodecLoad as a special case of the streaming functions
where we read the whole stream at once.
======================================================================
*/
void *S_MP3_CodecLoad(const char *filename, snd_info_t *info)
{
snd_stream_t *stream;
byte *pcmbuffer;
// check if input is valid
if(!filename)
return NULL;
stream = S_MP3_CodecOpenStream(filename);
if(!stream)
return NULL;
// copy over the info
info->rate = stream->info.rate;
info->width = stream->info.width;
info->channels = stream->info.channels;
info->samples = stream->info.samples;
info->dataofs = stream->info.dataofs;
// allocate enough buffer for all pcm data
pcmbuffer = Z_Malloc(stream->info.size);
if(!pcmbuffer)
{
S_MP3_CodecCloseStream(stream);
return NULL;
}
info->size = S_MP3_CodecReadStream(stream, stream->info.size, pcmbuffer);
if(info->size <= 0)
{
// we didn't read anything at all. darn.
Z_Free(pcmbuffer);
pcmbuffer = NULL;
}
S_MP3_CodecCloseStream(stream);
return pcmbuffer;
}
#endif // USE_CODEC_MP3

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/*
* libmad - MPEG audio decoder library
* Copyright (C) 2000-2004 Underbit Technologies, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU 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
*
* If you would like to negotiate alternate licensing terms, you may do
* so by contacting: Underbit Technologies, Inc. <info@underbit.com>
*/
# ifdef __cplusplus
extern "C" {
# endif
# define FPM_DEFAULT
# define SIZEOF_INT 4
# define SIZEOF_LONG 4
# define SIZEOF_LONG_LONG 8
/* Id: version.h,v 1.26 2004/01/23 09:41:33 rob Exp */
# ifndef LIBMAD_VERSION_H
# define LIBMAD_VERSION_H
# define MAD_VERSION_MAJOR 0
# define MAD_VERSION_MINOR 15
# define MAD_VERSION_PATCH 1
# define MAD_VERSION_EXTRA " (beta)"
# define MAD_VERSION_STRINGIZE(str) #str
# define MAD_VERSION_STRING(num) MAD_VERSION_STRINGIZE(num)
# define MAD_VERSION MAD_VERSION_STRING(MAD_VERSION_MAJOR) "." \
MAD_VERSION_STRING(MAD_VERSION_MINOR) "." \
MAD_VERSION_STRING(MAD_VERSION_PATCH) \
MAD_VERSION_EXTRA
# define MAD_PUBLISHYEAR "2000-2004"
# define MAD_AUTHOR "Underbit Technologies, Inc."
# define MAD_EMAIL "info@underbit.com"
extern char const mad_version[];
extern char const mad_copyright[];
extern char const mad_author[];
extern char const mad_build[];
# endif
/* Id: fixed.h,v 1.38 2004/02/17 02:02:03 rob Exp */
# ifndef LIBMAD_FIXED_H
# define LIBMAD_FIXED_H
# if SIZEOF_INT >= 4
typedef signed int mad_fixed_t;
typedef signed int mad_fixed64hi_t;
typedef unsigned int mad_fixed64lo_t;
# else
typedef signed long mad_fixed_t;
typedef signed long mad_fixed64hi_t;
typedef unsigned long mad_fixed64lo_t;
# endif
# if defined(_MSC_VER)
# define mad_fixed64_t signed __int64
# elif 1 || defined(__GNUC__)
# define mad_fixed64_t signed long long
# endif
# if defined(FPM_FLOAT)
typedef double mad_sample_t;
# else
typedef mad_fixed_t mad_sample_t;
# endif
/*
* Fixed-point format: 0xABBBBBBB
* A == whole part (sign + 3 bits)
* B == fractional part (28 bits)
*
* Values are signed two's complement, so the effective range is:
* 0x80000000 to 0x7fffffff
* -8.0 to +7.9999999962747097015380859375
*
* The smallest representable value is:
* 0x00000001 == 0.0000000037252902984619140625 (i.e. about 3.725e-9)
*
* 28 bits of fractional accuracy represent about
* 8.6 digits of decimal accuracy.
*
* Fixed-point numbers can be added or subtracted as normal
* integers, but multiplication requires shifting the 64-bit result
* from 56 fractional bits back to 28 (and rounding.)
*
* Changing the definition of MAD_F_FRACBITS is only partially
* supported, and must be done with care.
*/
# define MAD_F_FRACBITS 28
# if MAD_F_FRACBITS == 28
# define MAD_F(x) ((mad_fixed_t) (x##L))
# else
# if MAD_F_FRACBITS < 28
# warning "MAD_F_FRACBITS < 28"
# define MAD_F(x) ((mad_fixed_t) \
(((x##L) + \
(1L << (28 - MAD_F_FRACBITS - 1))) >> \
(28 - MAD_F_FRACBITS)))
# elif MAD_F_FRACBITS > 28
# error "MAD_F_FRACBITS > 28 not currently supported"
# define MAD_F(x) ((mad_fixed_t) \
((x##L) << (MAD_F_FRACBITS - 28)))
# endif
# endif
# define MAD_F_MIN ((mad_fixed_t) -0x80000000L)
# define MAD_F_MAX ((mad_fixed_t) +0x7fffffffL)
# define MAD_F_ONE MAD_F(0x10000000)
# define mad_f_tofixed(x) ((mad_fixed_t) \
((x) * (double) (1L << MAD_F_FRACBITS) + 0.5))
# define mad_f_todouble(x) ((double) \
((x) / (double) (1L << MAD_F_FRACBITS)))
# define mad_f_intpart(x) ((x) >> MAD_F_FRACBITS)
# define mad_f_fracpart(x) ((x) & ((1L << MAD_F_FRACBITS) - 1))
/* (x should be positive) */
# define mad_f_fromint(x) ((x) << MAD_F_FRACBITS)
# define mad_f_add(x, y) ((x) + (y))
# define mad_f_sub(x, y) ((x) - (y))
# if defined(FPM_FLOAT)
# error "FPM_FLOAT not yet supported"
# undef MAD_F
# define MAD_F(x) mad_f_todouble(x)
# define mad_f_mul(x, y) ((x) * (y))
# define mad_f_scale64
# undef ASO_ZEROCHECK
# elif defined(FPM_64BIT)
/*
* This version should be the most accurate if 64-bit types are supported by
* the compiler, although it may not be the most efficient.
*/
# if defined(OPT_ACCURACY)
# define mad_f_mul(x, y) \
((mad_fixed_t) \
((((mad_fixed64_t) (x) * (y)) + \
(1L << (MAD_F_SCALEBITS - 1))) >> MAD_F_SCALEBITS))
# else
# define mad_f_mul(x, y) \
((mad_fixed_t) (((mad_fixed64_t) (x) * (y)) >> MAD_F_SCALEBITS))
# endif
# define MAD_F_SCALEBITS MAD_F_FRACBITS
/* --- Intel --------------------------------------------------------------- */
# elif defined(FPM_INTEL)
# if defined(_MSC_VER)
# pragma warning(push)
# pragma warning(disable: 4035) /* no return value */
static __forceinline
mad_fixed_t mad_f_mul_inline(mad_fixed_t x, mad_fixed_t y)
{
enum {
fracbits = MAD_F_FRACBITS
};
__asm {
mov eax, x
imul y
shrd eax, edx, fracbits
}
/* implicit return of eax */
}
# pragma warning(pop)
# define mad_f_mul mad_f_mul_inline
# define mad_f_scale64
# else
/*
* This Intel version is fast and accurate; the disposition of the least
* significant bit depends on OPT_ACCURACY via mad_f_scale64().
*/
# define MAD_F_MLX(hi, lo, x, y) \
asm ("imull %3" \
: "=a" (lo), "=d" (hi) \
: "%a" (x), "rm" (y) \
: "cc")
# if defined(OPT_ACCURACY)
/*
* This gives best accuracy but is not very fast.
*/
# define MAD_F_MLA(hi, lo, x, y) \
({ mad_fixed64hi_t __hi; \
mad_fixed64lo_t __lo; \
MAD_F_MLX(__hi, __lo, (x), (y)); \
asm ("addl %2,%0\n\t" \
"adcl %3,%1" \
: "=rm" (lo), "=rm" (hi) \
: "r" (__lo), "r" (__hi), "0" (lo), "1" (hi) \
: "cc"); \
})
# endif /* OPT_ACCURACY */
# if defined(OPT_ACCURACY)
/*
* Surprisingly, this is faster than SHRD followed by ADC.
*/
# define mad_f_scale64(hi, lo) \
({ mad_fixed64hi_t __hi_; \
mad_fixed64lo_t __lo_; \
mad_fixed_t __result; \
asm ("addl %4,%2\n\t" \
"adcl %5,%3" \
: "=rm" (__lo_), "=rm" (__hi_) \
: "0" (lo), "1" (hi), \
"ir" (1L << (MAD_F_SCALEBITS - 1)), "ir" (0) \
: "cc"); \
asm ("shrdl %3,%2,%1" \
: "=rm" (__result) \
: "0" (__lo_), "r" (__hi_), "I" (MAD_F_SCALEBITS) \
: "cc"); \
__result; \
})
# elif defined(OPT_INTEL)
/*
* Alternate Intel scaling that may or may not perform better.
*/
# define mad_f_scale64(hi, lo) \
({ mad_fixed_t __result; \
asm ("shrl %3,%1\n\t" \
"shll %4,%2\n\t" \
"orl %2,%1" \
: "=rm" (__result) \
: "0" (lo), "r" (hi), \
"I" (MAD_F_SCALEBITS), "I" (32 - MAD_F_SCALEBITS) \
: "cc"); \
__result; \
})
# else
# define mad_f_scale64(hi, lo) \
({ mad_fixed_t __result; \
asm ("shrdl %3,%2,%1" \
: "=rm" (__result) \
: "0" (lo), "r" (hi), "I" (MAD_F_SCALEBITS) \
: "cc"); \
__result; \
})
# endif /* OPT_ACCURACY */
# define MAD_F_SCALEBITS MAD_F_FRACBITS
# endif
/* --- ARM ----------------------------------------------------------------- */
# elif defined(FPM_ARM)
/*
* This ARM V4 version is as accurate as FPM_64BIT but much faster. The
* least significant bit is properly rounded at no CPU cycle cost!
*/
# if 1
/*
* This is faster than the default implementation via MAD_F_MLX() and
* mad_f_scale64().
*/
# define mad_f_mul(x, y) \
({ mad_fixed64hi_t __hi; \
mad_fixed64lo_t __lo; \
mad_fixed_t __result; \
asm ("smull %0, %1, %3, %4\n\t" \
"movs %0, %0, lsr %5\n\t" \
"adc %2, %0, %1, lsl %6" \
: "=&r" (__lo), "=&r" (__hi), "=r" (__result) \
: "%r" (x), "r" (y), \
"M" (MAD_F_SCALEBITS), "M" (32 - MAD_F_SCALEBITS) \
: "cc"); \
__result; \
})
# endif
# define MAD_F_MLX(hi, lo, x, y) \
asm ("smull %0, %1, %2, %3" \
: "=&r" (lo), "=&r" (hi) \
: "%r" (x), "r" (y))
# define MAD_F_MLA(hi, lo, x, y) \
asm ("smlal %0, %1, %2, %3" \
: "+r" (lo), "+r" (hi) \
: "%r" (x), "r" (y))
# define MAD_F_MLN(hi, lo) \
asm ("rsbs %0, %2, #0\n\t" \
"rsc %1, %3, #0" \
: "=r" (lo), "=r" (hi) \
: "0" (lo), "1" (hi) \
: "cc")
# define mad_f_scale64(hi, lo) \
({ mad_fixed_t __result; \
asm ("movs %0, %1, lsr %3\n\t" \
"adc %0, %0, %2, lsl %4" \
: "=&r" (__result) \
: "r" (lo), "r" (hi), \
"M" (MAD_F_SCALEBITS), "M" (32 - MAD_F_SCALEBITS) \
: "cc"); \
__result; \
})
# define MAD_F_SCALEBITS MAD_F_FRACBITS
/* --- MIPS ---------------------------------------------------------------- */
# elif defined(FPM_MIPS)
/*
* This MIPS version is fast and accurate; the disposition of the least
* significant bit depends on OPT_ACCURACY via mad_f_scale64().
*/
# define MAD_F_MLX(hi, lo, x, y) \
asm ("mult %2,%3" \
: "=l" (lo), "=h" (hi) \
: "%r" (x), "r" (y))
# if defined(HAVE_MADD_ASM)
# define MAD_F_MLA(hi, lo, x, y) \
asm ("madd %2,%3" \
: "+l" (lo), "+h" (hi) \
: "%r" (x), "r" (y))
# elif defined(HAVE_MADD16_ASM)
/*
* This loses significant accuracy due to the 16-bit integer limit in the
* multiply/accumulate instruction.
*/
# define MAD_F_ML0(hi, lo, x, y) \
asm ("mult %2,%3" \
: "=l" (lo), "=h" (hi) \
: "%r" ((x) >> 12), "r" ((y) >> 16))
# define MAD_F_MLA(hi, lo, x, y) \
asm ("madd16 %2,%3" \
: "+l" (lo), "+h" (hi) \
: "%r" ((x) >> 12), "r" ((y) >> 16))
# define MAD_F_MLZ(hi, lo) ((mad_fixed_t) (lo))
# endif
# if defined(OPT_SPEED)
# define mad_f_scale64(hi, lo) \
((mad_fixed_t) ((hi) << (32 - MAD_F_SCALEBITS)))
# define MAD_F_SCALEBITS MAD_F_FRACBITS
# endif
/* --- SPARC --------------------------------------------------------------- */
# elif defined(FPM_SPARC)
/*
* This SPARC V8 version is fast and accurate; the disposition of the least
* significant bit depends on OPT_ACCURACY via mad_f_scale64().
*/
# define MAD_F_MLX(hi, lo, x, y) \
asm ("smul %2, %3, %0\n\t" \
"rd %%y, %1" \
: "=r" (lo), "=r" (hi) \
: "%r" (x), "rI" (y))
/* --- PowerPC ------------------------------------------------------------- */
# elif defined(FPM_PPC)
/*
* This PowerPC version is fast and accurate; the disposition of the least
* significant bit depends on OPT_ACCURACY via mad_f_scale64().
*/
# define MAD_F_MLX(hi, lo, x, y) \
do { \
asm ("mullw %0,%1,%2" \
: "=r" (lo) \
: "%r" (x), "r" (y)); \
asm ("mulhw %0,%1,%2" \
: "=r" (hi) \
: "%r" (x), "r" (y)); \
} \
while (0)
# if defined(OPT_ACCURACY)
/*
* This gives best accuracy but is not very fast.
*/
# define MAD_F_MLA(hi, lo, x, y) \
({ mad_fixed64hi_t __hi; \
mad_fixed64lo_t __lo; \
MAD_F_MLX(__hi, __lo, (x), (y)); \
asm ("addc %0,%2,%3\n\t" \
"adde %1,%4,%5" \
: "=r" (lo), "=r" (hi) \
: "%r" (lo), "r" (__lo), \
"%r" (hi), "r" (__hi) \
: "xer"); \
})
# endif
# if defined(OPT_ACCURACY)
/*
* This is slower than the truncating version below it.
*/
# define mad_f_scale64(hi, lo) \
({ mad_fixed_t __result, __round; \
asm ("rotrwi %0,%1,%2" \
: "=r" (__result) \
: "r" (lo), "i" (MAD_F_SCALEBITS)); \
asm ("extrwi %0,%1,1,0" \
: "=r" (__round) \
: "r" (__result)); \
asm ("insrwi %0,%1,%2,0" \
: "+r" (__result) \
: "r" (hi), "i" (MAD_F_SCALEBITS)); \
asm ("add %0,%1,%2" \
: "=r" (__result) \
: "%r" (__result), "r" (__round)); \
__result; \
})
# else
# define mad_f_scale64(hi, lo) \
({ mad_fixed_t __result; \
asm ("rotrwi %0,%1,%2" \
: "=r" (__result) \
: "r" (lo), "i" (MAD_F_SCALEBITS)); \
asm ("insrwi %0,%1,%2,0" \
: "+r" (__result) \
: "r" (hi), "i" (MAD_F_SCALEBITS)); \
__result; \
})
# endif
# define MAD_F_SCALEBITS MAD_F_FRACBITS
/* --- Default ------------------------------------------------------------- */
# elif defined(FPM_DEFAULT)
/*
* This version is the most portable but it loses significant accuracy.
* Furthermore, accuracy is biased against the second argument, so care
* should be taken when ordering operands.
*
* The scale factors are constant as this is not used with SSO.
*
* Pre-rounding is required to stay within the limits of compliance.
*/
# if defined(OPT_SPEED)
# define mad_f_mul(x, y) (((x) >> 12) * ((y) >> 16))
# else
# define mad_f_mul(x, y) ((((x) + (1L << 11)) >> 12) * \
(((y) + (1L << 15)) >> 16))
# endif
/* ------------------------------------------------------------------------- */
# else
# error "no FPM selected"
# endif
/* default implementations */
# if !defined(mad_f_mul)
# define mad_f_mul(x, y) \
({ register mad_fixed64hi_t __hi; \
register mad_fixed64lo_t __lo; \
MAD_F_MLX(__hi, __lo, (x), (y)); \
mad_f_scale64(__hi, __lo); \
})
# endif
# if !defined(MAD_F_MLA)
# define MAD_F_ML0(hi, lo, x, y) ((lo) = mad_f_mul((x), (y)))
# define MAD_F_MLA(hi, lo, x, y) ((lo) += mad_f_mul((x), (y)))
# define MAD_F_MLN(hi, lo) ((lo) = -(lo))
# define MAD_F_MLZ(hi, lo) ((void) (hi), (mad_fixed_t) (lo))
# endif
# if !defined(MAD_F_ML0)
# define MAD_F_ML0(hi, lo, x, y) MAD_F_MLX((hi), (lo), (x), (y))
# endif
# if !defined(MAD_F_MLN)
# define MAD_F_MLN(hi, lo) ((hi) = ((lo) = -(lo)) ? ~(hi) : -(hi))
# endif
# if !defined(MAD_F_MLZ)
# define MAD_F_MLZ(hi, lo) mad_f_scale64((hi), (lo))
# endif
# if !defined(mad_f_scale64)
# if defined(OPT_ACCURACY)
# define mad_f_scale64(hi, lo) \
((((mad_fixed_t) \
(((hi) << (32 - (MAD_F_SCALEBITS - 1))) | \
((lo) >> (MAD_F_SCALEBITS - 1)))) + 1) >> 1)
# else
# define mad_f_scale64(hi, lo) \
((mad_fixed_t) \
(((hi) << (32 - MAD_F_SCALEBITS)) | \
((lo) >> MAD_F_SCALEBITS)))
# endif
# define MAD_F_SCALEBITS MAD_F_FRACBITS
# endif
/* C routines */
mad_fixed_t mad_f_abs(mad_fixed_t);
mad_fixed_t mad_f_div(mad_fixed_t, mad_fixed_t);
# endif
/* Id: bit.h,v 1.12 2004/01/23 09:41:32 rob Exp */
# ifndef LIBMAD_BIT_H
# define LIBMAD_BIT_H
struct mad_bitptr {
unsigned char const *byte;
unsigned short cache;
unsigned short left;
};
void mad_bit_init(struct mad_bitptr *, unsigned char const *);
# define mad_bit_finish(bitptr) /* nothing */
unsigned int mad_bit_length(struct mad_bitptr const *,
struct mad_bitptr const *);
# define mad_bit_bitsleft(bitptr) ((bitptr)->left)
unsigned char const *mad_bit_nextbyte(struct mad_bitptr const *);
void mad_bit_skip(struct mad_bitptr *, unsigned int);
unsigned long mad_bit_read(struct mad_bitptr *, unsigned int);
void mad_bit_write(struct mad_bitptr *, unsigned int, unsigned long);
unsigned short mad_bit_crc(struct mad_bitptr, unsigned int, unsigned short);
# endif
/* Id: timer.h,v 1.16 2004/01/23 09:41:33 rob Exp */
# ifndef LIBMAD_TIMER_H
# define LIBMAD_TIMER_H
typedef struct {
signed long seconds; /* whole seconds */
unsigned long fraction; /* 1/MAD_TIMER_RESOLUTION seconds */
} mad_timer_t;
extern mad_timer_t const mad_timer_zero;
# define MAD_TIMER_RESOLUTION 352800000UL
enum mad_units {
MAD_UNITS_HOURS = -2,
MAD_UNITS_MINUTES = -1,
MAD_UNITS_SECONDS = 0,
/* metric units */
MAD_UNITS_DECISECONDS = 10,
MAD_UNITS_CENTISECONDS = 100,
MAD_UNITS_MILLISECONDS = 1000,
/* audio sample units */
MAD_UNITS_8000_HZ = 8000,
MAD_UNITS_11025_HZ = 11025,
MAD_UNITS_12000_HZ = 12000,
MAD_UNITS_16000_HZ = 16000,
MAD_UNITS_22050_HZ = 22050,
MAD_UNITS_24000_HZ = 24000,
MAD_UNITS_32000_HZ = 32000,
MAD_UNITS_44100_HZ = 44100,
MAD_UNITS_48000_HZ = 48000,
/* video frame/field units */
MAD_UNITS_24_FPS = 24,
MAD_UNITS_25_FPS = 25,
MAD_UNITS_30_FPS = 30,
MAD_UNITS_48_FPS = 48,
MAD_UNITS_50_FPS = 50,
MAD_UNITS_60_FPS = 60,
/* CD audio frames */
MAD_UNITS_75_FPS = 75,
/* video drop-frame units */
MAD_UNITS_23_976_FPS = -24,
MAD_UNITS_24_975_FPS = -25,
MAD_UNITS_29_97_FPS = -30,
MAD_UNITS_47_952_FPS = -48,
MAD_UNITS_49_95_FPS = -50,
MAD_UNITS_59_94_FPS = -60
};
# define mad_timer_reset(timer) ((void) (*(timer) = mad_timer_zero))
int mad_timer_compare(mad_timer_t, mad_timer_t);
# define mad_timer_sign(timer) mad_timer_compare((timer), mad_timer_zero)
void mad_timer_negate(mad_timer_t *);
mad_timer_t mad_timer_abs(mad_timer_t);
void mad_timer_set(mad_timer_t *, unsigned long, unsigned long, unsigned long);
void mad_timer_add(mad_timer_t *, mad_timer_t);
void mad_timer_multiply(mad_timer_t *, signed long);
signed long mad_timer_count(mad_timer_t, enum mad_units);
unsigned long mad_timer_fraction(mad_timer_t, unsigned long);
void mad_timer_string(mad_timer_t, char *, char const *,
enum mad_units, enum mad_units, unsigned long);
# endif
/* Id: stream.h,v 1.20 2004/02/05 09:02:39 rob Exp */
# ifndef LIBMAD_STREAM_H
# define LIBMAD_STREAM_H
# define MAD_BUFFER_GUARD 8
# define MAD_BUFFER_MDLEN (511 + 2048 + MAD_BUFFER_GUARD)
enum mad_error {
MAD_ERROR_NONE = 0x0000, /* no error */
MAD_ERROR_BUFLEN = 0x0001, /* input buffer too small (or EOF) */
MAD_ERROR_BUFPTR = 0x0002, /* invalid (null) buffer pointer */
MAD_ERROR_NOMEM = 0x0031, /* not enough memory */
MAD_ERROR_LOSTSYNC = 0x0101, /* lost synchronization */
MAD_ERROR_BADLAYER = 0x0102, /* reserved header layer value */
MAD_ERROR_BADBITRATE = 0x0103, /* forbidden bitrate value */
MAD_ERROR_BADSAMPLERATE = 0x0104, /* reserved sample frequency value */
MAD_ERROR_BADEMPHASIS = 0x0105, /* reserved emphasis value */
MAD_ERROR_BADCRC = 0x0201, /* CRC check failed */
MAD_ERROR_BADBITALLOC = 0x0211, /* forbidden bit allocation value */
MAD_ERROR_BADSCALEFACTOR = 0x0221, /* bad scalefactor index */
MAD_ERROR_BADMODE = 0x0222, /* bad bitrate/mode combination */
MAD_ERROR_BADFRAMELEN = 0x0231, /* bad frame length */
MAD_ERROR_BADBIGVALUES = 0x0232, /* bad big_values count */
MAD_ERROR_BADBLOCKTYPE = 0x0233, /* reserved block_type */
MAD_ERROR_BADSCFSI = 0x0234, /* bad scalefactor selection info */
MAD_ERROR_BADDATAPTR = 0x0235, /* bad main_data_begin pointer */
MAD_ERROR_BADPART3LEN = 0x0236, /* bad audio data length */
MAD_ERROR_BADHUFFTABLE = 0x0237, /* bad Huffman table select */
MAD_ERROR_BADHUFFDATA = 0x0238, /* Huffman data overrun */
MAD_ERROR_BADSTEREO = 0x0239 /* incompatible block_type for JS */
};
# define MAD_RECOVERABLE(error) ((error) & 0xff00)
struct mad_stream {
unsigned char const *buffer; /* input bitstream buffer */
unsigned char const *bufend; /* end of buffer */
unsigned long skiplen; /* bytes to skip before next frame */
int sync; /* stream sync found */
unsigned long freerate; /* free bitrate (fixed) */
unsigned char const *this_frame; /* start of current frame */
unsigned char const *next_frame; /* start of next frame */
struct mad_bitptr ptr; /* current processing bit pointer */
struct mad_bitptr anc_ptr; /* ancillary bits pointer */
unsigned int anc_bitlen; /* number of ancillary bits */
unsigned char (*main_data)[MAD_BUFFER_MDLEN];
/* Layer III main_data() */
unsigned int md_len; /* bytes in main_data */
int options; /* decoding options (see below) */
enum mad_error error; /* error code (see above) */
};
enum {
MAD_OPTION_IGNORECRC = 0x0001, /* ignore CRC errors */
MAD_OPTION_HALFSAMPLERATE = 0x0002 /* generate PCM at 1/2 sample rate */
# if 0 /* not yet implemented */
MAD_OPTION_LEFTCHANNEL = 0x0010, /* decode left channel only */
MAD_OPTION_RIGHTCHANNEL = 0x0020, /* decode right channel only */
MAD_OPTION_SINGLECHANNEL = 0x0030 /* combine channels */
# endif
};
void mad_stream_init(struct mad_stream *);
void mad_stream_finish(struct mad_stream *);
# define mad_stream_options(stream, opts) \
((void) ((stream)->options = (opts)))
void mad_stream_buffer(struct mad_stream *,
unsigned char const *, unsigned long);
void mad_stream_skip(struct mad_stream *, unsigned long);
int mad_stream_sync(struct mad_stream *);
char const *mad_stream_errorstr(struct mad_stream const *);
# endif
/* Id: frame.h,v 1.20 2004/01/23 09:41:32 rob Exp */
# ifndef LIBMAD_FRAME_H
# define LIBMAD_FRAME_H
enum mad_layer {
MAD_LAYER_I = 1, /* Layer I */
MAD_LAYER_II = 2, /* Layer II */
MAD_LAYER_III = 3 /* Layer III */
};
enum mad_mode {
MAD_MODE_SINGLE_CHANNEL = 0, /* single channel */
MAD_MODE_DUAL_CHANNEL = 1, /* dual channel */
MAD_MODE_JOINT_STEREO = 2, /* joint (MS/intensity) stereo */
MAD_MODE_STEREO = 3 /* normal LR stereo */
};
enum mad_emphasis {
MAD_EMPHASIS_NONE = 0, /* no emphasis */
MAD_EMPHASIS_50_15_US = 1, /* 50/15 microseconds emphasis */
MAD_EMPHASIS_CCITT_J_17 = 3, /* CCITT J.17 emphasis */
MAD_EMPHASIS_RESERVED = 2 /* unknown emphasis */
};
struct mad_header {
enum mad_layer layer; /* audio layer (1, 2, or 3) */
enum mad_mode mode; /* channel mode (see above) */
int mode_extension; /* additional mode info */
enum mad_emphasis emphasis; /* de-emphasis to use (see above) */
unsigned long bitrate; /* stream bitrate (bps) */
unsigned int samplerate; /* sampling frequency (Hz) */
unsigned short crc_check; /* frame CRC accumulator */
unsigned short crc_target; /* final target CRC checksum */
int flags; /* flags (see below) */
int private_bits; /* private bits (see below) */
mad_timer_t duration; /* audio playing time of frame */
};
struct mad_frame {
struct mad_header header; /* MPEG audio header */
int options; /* decoding options (from stream) */
mad_fixed_t sbsample[2][36][32]; /* synthesis subband filter samples */
mad_fixed_t (*overlap)[2][32][18]; /* Layer III block overlap data */
};
# define MAD_NCHANNELS(header) ((header)->mode ? 2 : 1)
# define MAD_NSBSAMPLES(header) \
((header)->layer == MAD_LAYER_I ? 12 : \
(((header)->layer == MAD_LAYER_III && \
((header)->flags & MAD_FLAG_LSF_EXT)) ? 18 : 36))
enum {
MAD_FLAG_NPRIVATE_III = 0x0007, /* number of Layer III private bits */
MAD_FLAG_INCOMPLETE = 0x0008, /* header but not data is decoded */
MAD_FLAG_PROTECTION = 0x0010, /* frame has CRC protection */
MAD_FLAG_COPYRIGHT = 0x0020, /* frame is copyright */
MAD_FLAG_ORIGINAL = 0x0040, /* frame is original (else copy) */
MAD_FLAG_PADDING = 0x0080, /* frame has additional slot */
MAD_FLAG_I_STEREO = 0x0100, /* uses intensity joint stereo */
MAD_FLAG_MS_STEREO = 0x0200, /* uses middle/side joint stereo */
MAD_FLAG_FREEFORMAT = 0x0400, /* uses free format bitrate */
MAD_FLAG_LSF_EXT = 0x1000, /* lower sampling freq. extension */
MAD_FLAG_MC_EXT = 0x2000, /* multichannel audio extension */
MAD_FLAG_MPEG_2_5_EXT = 0x4000 /* MPEG 2.5 (unofficial) extension */
};
enum {
MAD_PRIVATE_HEADER = 0x0100, /* header private bit */
MAD_PRIVATE_III = 0x001f /* Layer III private bits (up to 5) */
};
void mad_header_init(struct mad_header *);
# define mad_header_finish(header) /* nothing */
int mad_header_decode(struct mad_header *, struct mad_stream *);
void mad_frame_init(struct mad_frame *);
void mad_frame_finish(struct mad_frame *);
int mad_frame_decode(struct mad_frame *, struct mad_stream *);
void mad_frame_mute(struct mad_frame *);
# endif
/* Id: synth.h,v 1.15 2004/01/23 09:41:33 rob Exp */
# ifndef LIBMAD_SYNTH_H
# define LIBMAD_SYNTH_H
struct mad_pcm {
unsigned int samplerate; /* sampling frequency (Hz) */
unsigned short channels; /* number of channels */
unsigned short length; /* number of samples per channel */
mad_fixed_t samples[2][1152]; /* PCM output samples [ch][sample] */
};
struct mad_synth {
mad_fixed_t filter[2][2][2][16][8]; /* polyphase filterbank outputs */
/* [ch][eo][peo][s][v] */
unsigned int phase; /* current processing phase */
struct mad_pcm pcm; /* PCM output */
};
/* single channel PCM selector */
enum {
MAD_PCM_CHANNEL_SINGLE = 0
};
/* dual channel PCM selector */
enum {
MAD_PCM_CHANNEL_DUAL_1 = 0,
MAD_PCM_CHANNEL_DUAL_2 = 1
};
/* stereo PCM selector */
enum {
MAD_PCM_CHANNEL_STEREO_LEFT = 0,
MAD_PCM_CHANNEL_STEREO_RIGHT = 1
};
void mad_synth_init(struct mad_synth *);
# define mad_synth_finish(synth) /* nothing */
void mad_synth_mute(struct mad_synth *);
void mad_synth_frame(struct mad_synth *, struct mad_frame const *);
# endif
/* Id: decoder.h,v 1.17 2004/01/23 09:41:32 rob Exp */
# ifndef LIBMAD_DECODER_H
# define LIBMAD_DECODER_H
enum mad_decoder_mode {
MAD_DECODER_MODE_SYNC = 0,
MAD_DECODER_MODE_ASYNC
};
enum mad_flow {
MAD_FLOW_CONTINUE = 0x0000, /* continue normally */
MAD_FLOW_STOP = 0x0010, /* stop decoding normally */
MAD_FLOW_BREAK = 0x0011, /* stop decoding and signal an error */
MAD_FLOW_IGNORE = 0x0020 /* ignore the current frame */
};
struct mad_decoder {
enum mad_decoder_mode mode;
int options;
struct {
long pid;
int in;
int out;
} async;
struct {
struct mad_stream stream;
struct mad_frame frame;
struct mad_synth synth;
} *sync;
void *cb_data;
enum mad_flow (*input_func)(void *, struct mad_stream *);
enum mad_flow (*header_func)(void *, struct mad_header const *);
enum mad_flow (*filter_func)(void *,
struct mad_stream const *, struct mad_frame *);
enum mad_flow (*output_func)(void *,
struct mad_header const *, struct mad_pcm *);
enum mad_flow (*error_func)(void *, struct mad_stream *, struct mad_frame *);
enum mad_flow (*message_func)(void *, void *, unsigned int *);
};
void mad_decoder_init(struct mad_decoder *, void *,
enum mad_flow (*)(void *, struct mad_stream *),
enum mad_flow (*)(void *, struct mad_header const *),
enum mad_flow (*)(void *,
struct mad_stream const *,
struct mad_frame *),
enum mad_flow (*)(void *,
struct mad_header const *,
struct mad_pcm *),
enum mad_flow (*)(void *,
struct mad_stream *,
struct mad_frame *),
enum mad_flow (*)(void *, void *, unsigned int *));
int mad_decoder_finish(struct mad_decoder *);
# define mad_decoder_options(decoder, opts) \
((void) ((decoder)->options = (opts)))
int mad_decoder_run(struct mad_decoder *, enum mad_decoder_mode);
int mad_decoder_message(struct mad_decoder *, void *, unsigned int *);
# endif
# ifdef __cplusplus
}
# endif

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# libmad.la - a libtool library file
# Generated by ltmain.sh - GNU libtool 1.5.2 (1.1220.2.60 2004/01/25 12:25:08) Debian: 192 $
#
# Please DO NOT delete this file!
# It is necessary for linking the library.
# The name that we can dlopen(3).
dlname='../bin/libmad-0.dll'
# Names of this library.
library_names='libmad.dll.a'
# The name of the static archive.
old_library='libmad.a'
# Libraries that this one depends upon.
dependency_libs=''
# Version information for libmad.
current=2
age=2
revision=1
# Is this an already installed library?
installed=yes
# Should we warn about portability when linking against -modules?
shouldnotlink=no
# Files to dlopen/dlpreopen
dlopen=''
dlpreopen=''
# Directory that this library needs to be installed in:
libdir='/usr/local/lib'

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# libmad.la - a libtool library file
# Generated by ltmain.sh - GNU libtool 1.5.2 (1.1220.2.60 2004/01/25 12:25:08) Debian: 192 $
#
# Please DO NOT delete this file!
# It is necessary for linking the library.
# The name that we can dlopen(3).
dlname='../bin/libmad-0.dll'
# Names of this library.
library_names='libmad.dll.a'
# The name of the static archive.
old_library='libmad.a'
# Libraries that this one depends upon.
dependency_libs=''
# Version information for libmad.
current=2
age=2
revision=1
# Is this an already installed library?
installed=yes
# Should we warn about portability when linking against -modules?
shouldnotlink=no
# Files to dlopen/dlpreopen
dlopen=''
dlpreopen=''
# Directory that this library needs to be installed in:
libdir='/usr/local/lib'