Update of /cvsroot/audacity/lib-src/twolame/simplefrontend
In directory sc8-pr-cvs11.sourceforge.net:/tmp/cvs-serv26676/simplefrontend
Added Files:
Makefile.am Makefile.in audio_wave.c audio_wave.h
simplefrontend.c
Log Message:
Add twolame MP2 import library to lib-src
--- NEW FILE: Makefile.in ---
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# Tell versions [3.59,3.63) of GNU make to not export all variables.
# Otherwise a system limit (for SysV at least) may be exceeded.
.NOEXPORT:
--- NEW FILE: audio_wave.c ---
/*
* TwoLAME: an optimized MPEG Audio Layer Two encoder
*
* Copyright (C) 2001-2004 Michael Cheng
* Copyright (C) 2004-2005 The TwoLAME Project
*
* 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 2.1 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, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "audio_wave.h"
/*****************************************************************************
*
* Routines to determine byte order (of this machine) and swap bytes
*
*****************************************************************************/
enum byte_order { order_unknown, order_bigEndian, order_littleEndian };
static enum byte_order DetermineByteOrder (void)
{
char s[sizeof (long) + 1];
union {
long longval;
char charval[sizeof (long)];
} probe;
probe.longval = 0x41424344L; /* ABCD in ASCII */
strncpy (s, probe.charval, sizeof (long));
s[sizeof (long)] = '\0';
/* fprintf( stderr, "byte order is %s\n", s ); */
if (strcmp (s, "ABCD") == 0)
return order_bigEndian;
else if (strcmp (s, "DCBA") == 0)
return order_littleEndian;
else
return order_unknown;
}
static void SwapBytesInWords (short *loc, int words)
{
int i;
short thisval;
char *dst, *src;
src = (char *) &thisval;
for (i = 0; i < words; i++) {
thisval = *loc;
dst = (char *) loc++;
dst[0] = src[1];
dst[1] = src[0];
}
}
/*****************************************************************************
*
* Read in specified number of samples
*
*****************************************************************************/
int wave_get_samples (wave_info_t *wave_info, short int pcm[], int numSamples)
{
int samples_read;
FILE *file = wave_info->soundfile;
samples_read = fread (pcm, sizeof(short int), numSamples, file);
if (wave_info->byteswap) {
SwapBytesInWords (pcm, samples_read);
}
return (samples_read/wave_info->channels);
}
/*****************************************************************************
*
* parse the wave header.
* returns NULL if not open failed
* returns a wave_info_t * if wave header successfully parsed.
* needs to fill in : samplerate + channels
*
* POST: wave_info->soundfile is set to be at the start of the
* PCM audio data
*
*****************************************************************************/
wave_info_t *wave_init (char *inPath)
{
unsigned char wave_header_buffer[40]; //HH fixed
int wave_header_read = 0;
int wave_header_stereo = -1;
int wave_header_16bit = -1;
unsigned long samplerate;
enum byte_order NativeByteOrder = order_unknown;
wave_info_t *wave_info = NULL;
FILE *file;
if ( (file = fopen(inPath, "r"))==NULL) {
fprintf(stdout,"WAV: cannot open input file: %s\n", inPath);
return(NULL);
}
/**************************** WAVE *********************************/
/* Nick Burch <[EMAIL PROTECTED]> */
/*********************************/
/* Wave File Headers: (Dec) */
/* 8-11 = "WAVE" */
/* 22 = Stereo / Mono */
/* 01 = mono, 02 = stereo */
/* 24 = Sampling Frequency */
/* 32 = Data Rate */
/* 01 = x1 (8bit Mono) */
/* 02 = x2 (8bit Stereo or */
/* 16bit Mono) */
/* 04 = x4 (16bit Stereo) */
/*********************************/
fseek (file, 0, SEEK_SET);
fread (wave_header_buffer, 1, 40, file);
if (wave_header_buffer[8] == 'W' && wave_header_buffer[9] == 'A'
&& wave_header_buffer[10] == 'V' && wave_header_buffer[11] == 'E') {
fprintf (stderr, "Parsing Wave File Header\n");
if (NativeByteOrder == order_unknown) {
NativeByteOrder = DetermineByteOrder ();
if (NativeByteOrder == order_unknown) {
fprintf (stderr, "byte order not determined\n");
fclose(file); return(NULL);
}
}
if (NativeByteOrder == order_littleEndian) {
samplerate = *(unsigned long *) (&wave_header_buffer[24]);
} else {
samplerate = wave_header_buffer[27] +
(wave_header_buffer[26] << 8) +
(wave_header_buffer[25] << 16) + (wave_header_buffer[24] << 24);
}
/* Wave File */
wave_header_read = 1;
switch (samplerate) {
case 44100:
case 48000:
case 32000:
case 24000:
case 22050:
case 16000:
fprintf (stderr, ">>> %ld Hz sampling freq selected\n", samplerate);
break;
default:
/* Unknown Unsupported Frequency */
fprintf (stderr, ">>> Unknown samp freq %ld Hz in Wave Header\n",
samplerate);
fprintf (stderr, ">>> Default 44.1 kHz samp freq selected\n");
samplerate = 44100;
}
if ((long) wave_header_buffer[22] == 1) {
fprintf (stderr, ">>> Input Wave File is Mono\n");
wave_header_stereo = 0;
}
if ((long) wave_header_buffer[22] == 2) {
fprintf (stderr, ">>> Input Wave File is Stereo\n");
wave_header_stereo = 1;
}
if ((long) wave_header_buffer[32] == 1) {
fprintf (stderr, ">>> Input Wave File is 8 Bit\n");
wave_header_16bit = 0;
fprintf (stderr, "Input File must be 16 Bit! Please Re-sample");
fclose(file); return(NULL);
}
if ((long) wave_header_buffer[32] == 2) {
if (wave_header_stereo == 1) {
fprintf (stderr, ">>> Input Wave File is 8 Bit\n");
wave_header_16bit = 0;
fprintf (stderr, "Input File must be 16 Bit! Please Re-sample");
fclose(file); return(NULL);
} else {
/* fprintf(stderr, ">>> Input Wave File is 16 Bit\n" ); */
wave_header_16bit = 1;
}
}
if ((long) wave_header_buffer[32] == 4) {
/* fprintf(stderr, ">>> Input Wave File is 16 Bit\n" ); */
wave_header_16bit = 1;
}
/* should probably use the wave header to determine size here FIXME MFC Feb
2003 */
if (fseek (file, 44, SEEK_SET) != 0) { /* there's a way of calculating
the size of the
wave header. i'll just jump
44 to start with */
fprintf (stderr, "Could not seek to PCM sound data in \"%s\".\n",
inPath);
fclose(file); return(NULL);
}
// Successfully processed the wave header
wave_info = (wave_info_t *)calloc(1, sizeof(wave_info_t));
wave_info->soundfile = file;
if (wave_header_stereo == 1)
wave_info->channels = 2;
else
wave_info->channels = 1;
wave_info->samplerate = samplerate;
wave_info->num_samples = -1; // UNKNOWN. But we really should be able
to work
// it out. FIX THIS. MFC May03.
// Enable byte swap for big endian machines
if (NativeByteOrder == order_bigEndian)
wave_info->byteswap = 1;
else wave_info->byteswap = 0;
return(wave_info);
}
// not a wave file
fclose(file); return(NULL);
}
--- NEW FILE: audio_wave.h ---
/*
* TwoLAME: an optimized MPEG Audio Layer Two encoder
*
* Copyright (C) 2001-2004 Michael Cheng
* Copyright (C) 2004-2005 The TwoLAME Project
*
* 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 2.1 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, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
typedef struct wave_info_struct
{
FILE *soundfile;
short channels; // 1 - mono . 2 - stereo. d'uh.
unsigned long num_samples; //total number of samples/channel if
available
short samplesize; //8 bit or 16bit. could probably just auto scale. but
i think
// we'll just ignore 8bit sound. MFC
May03
int samplerate; // in Hz
int byteswap;
}
wave_info_t;
wave_info_t *wave_init(char *inPath);
int wave_get_samples(wave_info_t *wave_info, short int pcm[], int num_samples);
--- NEW FILE: Makefile.am ---
AM_CFLAGS = -I../libtwolame/
# This is just sample code - don't install it
noinst_PROGRAMS = stwolame
stwolame_SOURCES = \
simplefrontend.c \
audio_wave.h \
audio_wave.c
stwolame_LDADD = $(top_srcdir)/libtwolame/libtwolame.la
--- NEW FILE: simplefrontend.c ---
/*
* TwoLAME: an optimized MPEG Audio Layer Two encoder
*
* Copyright (C) 2001-2004 Michael Cheng
* Copyright (C) 2004-2005 The TwoLAME Project
*
* 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 2.1 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, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <twolame.h>
#include "audio_wave.h"
#define MP2BUFSIZE (16384)
#define AUDIOBUFSIZE (9216)
void usage (void) {
fprintf(stdout,"stwolame <input wavefile> <output mp2 file>\n");
exit (1);
}
int main (int argc, char **argv) {
twolame_options *encodeOptions;
char *inputfilename = argv[1];
char *outputfilename = argv[2];
FILE *outfile;
short int *pcmaudio;
unsigned char *mp2buffer;
int num_samples=0;
int mp2fill_size=0;
int frames=0;
wave_info_t *wave_info = NULL;
if (argc != 3) usage();
/* Allocate some space for the PCM audio data */
if ( (pcmaudio=(short *)calloc(AUDIOBUFSIZE, sizeof(short)))==NULL) {
fprintf(stdout,"pcmaudio alloc failed\n");
exit(99);
}
/* Allocate some space for the encoded MP2 audio data */
if ( (mp2buffer=(unsigned char *)calloc(MP2BUFSIZE, sizeof(unsigned
char)))==NULL) {
fprintf(stdout,"mp2buffer alloc failed\n");
exit(99);
}
/* grab a set of default encode options */
encodeOptions = twolame_init();
fprintf(stdout,"Using libtwolame version %s.\n", get_twolame_version());
/* Open the wave file */
if ( (wave_info = wave_init(inputfilename)) == NULL ) {
fprintf(stdout,"Not a recognised WAV file.\n");
exit(99);
}
// Use sound file to over-ride preferences for
// mono/stereo and sampling-frequency
twolame_set_num_channels(encodeOptions, wave_info->channels);
if (wave_info->channels == 1) {
twolame_set_mode(encodeOptions, TWOLAME_MONO);
} else {
twolame_set_mode(encodeOptions, TWOLAME_JOINT_STEREO);
}
/* Set the input and output sample rate to the same */
twolame_set_in_samplerate(encodeOptions, wave_info->samplerate);
twolame_set_out_samplerate(encodeOptions, wave_info->samplerate);
/* Set the bitrate to 160 kbps */
twolame_set_bitrate(encodeOptions, 160);
/* initialise twolame with this set of options */
if (twolame_init_params( encodeOptions ) != 0) {
fprintf(stderr, "Error: configuring libtwolame encoder failed.\n");
exit(99);
}
/* Open the output file for the encoded MP2 data */
if ((outfile = fopen(outputfilename, "w"))==0) {
fprintf(stdout,"error opening output file %s\n",outputfilename);
exit(99);
}
// Read num_samples of audio data *per channel* from the input file
while ( (num_samples = wave_get_samples(wave_info, pcmaudio,
AUDIOBUFSIZE)) != 0 ) {
// Encode the audio!
mp2fill_size = twolame_encode_buffer_interleaved(encodeOptions,
pcmaudio, num_samples, mp2buffer, MP2BUFSIZE);
// Write the MPEG bitstream to the file
fwrite(mp2buffer, sizeof(unsigned char), mp2fill_size, outfile);
// Display the number of MPEG audio frames we have encoded
frames += (num_samples/1152);
fprintf(stdout,"[%04i]\r", frames);
fflush(stdout);
}
/* flush any remaining audio. (don't send any new audio data)
There should only ever be a max of 1 frame on a flush.
There may be zero frames if the audio data was an exact
multiple of 1152 */
mp2fill_size = twolame_encode_flush(encodeOptions, mp2buffer,
MP2BUFSIZE);
fwrite(mp2buffer, sizeof(unsigned char), mp2fill_size, outfile);
twolame_close( &encodeOptions );
free(pcmaudio);
fprintf(stdout,"\nFinished nicely.\n");
return(0);
}
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