Update of /cvsroot/audacity/lib-src/twolame/frontend
In directory sc8-pr-cvs11.sourceforge.net:/tmp/cvs-serv26676/frontend
Added Files:
Makefile.am Makefile.in frontend.c
Log Message:
Add twolame MP2 import library to lib-src
--- NEW FILE: Makefile.in ---
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AM_CFLAGS = -I$(top_srcdir)/build/ -I$(top_srcdir)/libtwolame/ @SNDFILE_CFLAGS@
AM_LDFLAGS = @SNDFILE_LIBS@
bin_PROGRAMS = @TWOLAME_BIN@
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--- NEW FILE: frontend.c ---
/*
* TwoLAME: an optimized MPEG Audio Layer Two encoder
*
* 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 <unistd.h>
#include <getopt.h>
#include <twolame.h>
#include <sndfile.h>
/*
Constants
*/
#define MP2BUFSIZE (16384)
#define AUDIOBUFSIZE (9210)
#define MAX_NAME_SIZE (256)
#define OUTPUT_SUFFIX ".mp2"
/*
Result codes
*/
#define ERR_NO_ERROR (0) // No Error (encoded ok)
#define ERR_NO_ENCODE (1) // No Error (no encoding performed)
#define ERR_OPENING_INPUT (2) // Error opening input file
#define ERR_OPENING_OUTPUT (4) // Error opening output file
#define ERR_MEM_ALLOC (6) // Error allocating memory
#define ERR_INVALID_PARAM (8) // Error in chosen encoding parameters
#define ERR_READING_INPUT (10) // Error reading input
#define ERR_ENCODING (12) // Error occured during encoding
#define ERR_WRITING_OUTPUT (14) // Error occured writing to output file
/*
Global Variables
*/
int single_frame_mode = FALSE; // only encode a single frame of MPEG audio
?
int byteswap = FALSE; // swap endian on input audio ?
int channelswap = FALSE; // swap left and right channels ?
SF_INFO sfinfo = {0,44100,2,0,0,0}; // contains information about input
file format
char inputfilename[MAX_NAME_SIZE] = "\0";
char outputfilename[MAX_NAME_SIZE] = "\0";
/*
new_extension()
Puts a new extension name on a file name <filename>.
Removes the last extension name, if any.
*/
static void
new_extension(char *filename, char *extname, char *newname)
{
int found, dotpos;
/* First, strip the extension */
dotpos = strlen(filename);
found = 0;
do {
switch (filename[dotpos]) {
case '.':
found = 1;
break;
case '\\':
case '/':
case ':':
found = -1;
break;
default:
dotpos--;
if (dotpos < 0)
found = -1;
break;
}
} while (found == 0);
if (found == -1) {
strncpy(newname, filename, MAX_NAME_SIZE);
}
if (found == 1) {
strncpy(newname, filename, dotpos);
newname[dotpos] = '\0';
}
strcat(newname, extname);
}
/*
print_file_config()
Display information about input and output files
*/
static void
print_file_config( SNDFILE *inputfile, int verbosity )
{
SF_FORMAT_INFO format_info;
// Are we being silent ?
if (verbosity<=0) return;
// Convert
if (strcmp( inputfilename, "-" )==0) strcpy(inputfilename, "STDIN");
if (strcmp( outputfilename, "-" )==0) strcpy(outputfilename, "STDOUT");
format_info.format = sfinfo.format;
sf_command (inputfile, SFC_GET_FORMAT_INFO, &format_info, sizeof
(format_info)) ;
if (verbosity==1) {
fprintf(stderr, "Encoding %s to %s\n", inputfilename,
outputfilename);
} else {
fprintf(stderr,
"---------------------------------------------------------\n");
fprintf(stderr, "Input File: %s\n", inputfilename );
fprintf(stderr, "Input Format: %s\n", format_info.name );
fprintf(stderr, "Output File: %s\n", outputfilename );
}
// ** TODO: duration of input file **
// Number of frames of mpeg audio to be output
// file size of input
// file size of output
// bitrate of input
// bitrate of output
// compression ratio
}
/*
usage_long()
Display the extended usage information
*/
static void
usage_long()
{
fprintf(stdout, "TwoLAME version %s (%s)\n", get_twolame_version(),
get_twolame_url());
fprintf(stdout, "MPEG Audio Layer II (MP2) encoder\n");
fprintf(stdout, "Usage: \n");
fprintf(stdout, "\ttwolame [options] <infile> [outfile]\n");
fprintf(stdout, "\n");
fprintf(stdout, "Both input and output filenames can be set to - to use
stdin/stdout.\n");
fprintf(stdout, " <infile> input sound file (any format supported by
libsndfile)\n");
fprintf(stdout, " <outfile> output bit stream of encoded audio\n");
fprintf(stdout, "\nInput Options\n");
fprintf(stdout, "\t-r, --raw-input input is raw 16-bit signed PCM
audio\n");
fprintf(stdout, "\t-x, --byte-swap force byte-swapping of
input\n");
fprintf(stdout, "\t-s, --samplerate srate sampling frequency of raw input
(kHz)\n");
fprintf(stdout, "\t-N, --channels nch number of channels in raw
input\n");
fprintf(stdout, "\t-g, --swap-channels swap channels of input file\n");
fprintf(stdout, "\t --scale value scale input (multiply PCM
data)\n");
fprintf(stdout, "\t --scale-l value scale channel 0 (left)
input\n");
fprintf(stdout, "\t --scale-r value scale channel 1 (right)
input\n");
fprintf(stdout, "\nOutput Options\n");
fprintf(stdout, "\t-m, --mode mode (s)tereo, (j)oint, (m)ono or
(a)uto\n");
fprintf(stdout, "\t-a, --downmix downmix from stereo to mono
file for mono encoding\n");
fprintf(stdout, "\t-b, --bitrate br total bitrate in kbps (default
192 for 44.1kHz)\n");
fprintf(stdout, "\t-P, --psyc-mode psyc psychoacoustic model -1 to 3
(default 3)\n");
fprintf(stdout, "\t-v, --vbr enable VBR mode\n");
fprintf(stdout, "\t-V, --vbr-level lev enable VBR and set VBR level
-50 to 50 (default 5)\n");
fprintf(stdout, "\t-B, --max-bitrate rate set the upper bitrate when in
VBR mode\n");
fprintf(stdout, "\t-l, --ath lev ATH level (default 0)\n");
fprintf(stdout, "\t-q, --quick num only calculate psy model every
num frames\n");
fprintf(stdout, "\t-S, --single-frame only encode a single frame of
MPEG Audio\n");
fprintf(stdout, "\nMiscellaneous Options\n");
fprintf(stdout, "\t-c, --copyright mark as copyright\n");
fprintf(stdout, "\t-o, --non-original mark as non-original\n");
fprintf(stdout, "\t --original mark as original (default)\n");
fprintf(stdout, "\t-p, --protect enable CRC error
protection\n");
fprintf(stdout, "\t-d, --padding force padding bit/frame on\n");
fprintf(stdout, "\t-R, --reserve-bits num set number of reserved bits in
each frame\n");
fprintf(stdout, "\t-e, --deemphasis emp de-emphasis n/5/c (default:
(n)one)\n");
fprintf(stdout, "\t-E, --energy turn on energy level
extensions\n");
fprintf(stdout, "\nVerbosity Options\n");
fprintf(stdout, "\t-t, --talkativity num talkativity 0-10 (default is
2)\n");
fprintf(stdout, "\t --quiet same as --talkativity=0\n");
fprintf(stdout, "\t --brief same as --talkativity=1\n");
fprintf(stdout, "\t --verbose same as --talkativity=4\n");
fprintf(stdout, "\n");
fprintf(stdout, "\nAllowable bitrates for 32, 44.1 and 48kHz sample input
(MPEG-1)\n");
fprintf(stdout, " 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224,
256, 320, 384\n");
fprintf(stdout, "\nAllowable bitrates for 16, 22.05 and 24kHz sample input
(MPEG-2)\n");
fprintf(stdout, " 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112,
128, 144, 160\n");
fprintf(stdout, "\n");
exit(ERR_NO_ENCODE);
}
/*
usage_short()
Display the short usage information
*/
void
usage_short()
{
/* print a bit of info about the program */
fprintf(stdout, "TwoLAME version %s (%s)\n", get_twolame_version(),
get_twolame_url());
fprintf(stderr, "MPEG Audio Layer II (MP2) encoder\n\n");
fprintf(stderr, "Usage: twolame [options] <infile> [outfile]\n\n");
fprintf(stderr, "Try \"twolame --help\" for more information.\n");
exit(ERR_NO_ENCODE);
}
/*
build_shortopt_string()
Creates a short args string from the options structure
for use with getopt_long
*/
char*
build_shortopt_string( struct option* opts )
{
int count=0;
char *shortstr = NULL;
int c=0, n=0;
// Start by counting the number of options
while( opts[count].val!=0 ) { count++; }
// Allocate memory for the string
shortstr = malloc( (count * 2) + 1 );
// And loop through the options again
for(n=0; opts[n].val!=0; n++ ) {
if (opts[n].val > 0 && opts[n].val < 127) {
shortstr[c++] = opts[n].val;
if (opts[n].has_arg == optional_argument) {
fprintf(stderr, "gah: can't do optional arguments\n");
} else if (opts[n].has_arg == required_argument) {
shortstr[c++] = ':';
}
}
}
// Finally - terminate the string
shortstr[c] = '\0';
return shortstr;
}
/*
parse_args()
Parse the command line arguments
*/
void
parse_args(int argc, char **argv, twolame_options * encopts )
{
int ch=0;
// process args
struct option longopts[] = {
// Input
{ "raw-input", no_argument, NULL, 'r' },
{ "byte-swap", no_argument, NULL, 'x' },
{ "samplerate", required_argument, NULL, 's' },
{ "channels", required_argument, NULL, 'N' },
{ "swap-channels", no_argument, NULL, 'g' },
{ "scale", required_argument, NULL, 1000 },
{ "scale-l", required_argument, NULL, 1001 },
{ "scale-r", required_argument, NULL, 1002 },
// Output
{ "mode", required_argument, NULL, 'm' },
{ "downmix", no_argument, NULL, 'a' },
{ "bitrate", required_argument, NULL, 'b' },
{ "psyc-mode", required_argument, NULL, 'P' },
{ "vbr", no_argument, NULL, 'v' },
{ "vbr-level", required_argument, NULL, 'V' },
{ "max-bitrate", required_argument, NULL, 'B' },
{ "ath", required_argument, NULL, 'l' },
{ "quick", required_argument, NULL, 'q' },
{ "single-frame", no_argument, NULL, 'S' },
// Misc
{ "copyright", no_argument, NULL, 'c' },
{ "non-original", no_argument, NULL, 'o' },
{ "original", no_argument, NULL, 1003 },
{ "protect", no_argument, NULL, 'p' },
{ "padding", no_argument, NULL, 'd' },
{ "reserve-bits", required_argument, NULL, 'R' },
{ "deemphasis", required_argument, NULL, 'e' },
{ "energy", no_argument, NULL, 'E' },
// Verbosity
{ "talkativity", required_argument, NULL, 't' },
{ "quiet", no_argument, NULL, 1004 },
{ "brief", no_argument, NULL, 1005 },
{ "verbose", no_argument, NULL, 1006 },
{ "help", no_argument, NULL, 'h' },
{ NULL, 0, NULL, 0 }
};
// Create a short options structure from the long one
char* shortopts = build_shortopt_string( longopts );
//printf("shortopts: %s\n", shortopts);
while( (ch = getopt_long( argc, argv, shortopts, longopts, NULL )) != -1)
{
switch(ch) {
// Input
case 'r':
sfinfo.format = SF_FORMAT_RAW | SF_FORMAT_PCM_16;
break;
case 'x':
byteswap = TRUE;
break;
case 's':
twolame_set_out_samplerate(encopts, atoi(optarg));
sfinfo.samplerate = atoi(optarg);
break;
case 'N':
sfinfo.channels = atoi(optarg);
break;
case 'g':
channelswap = TRUE;
break;
case 1000: // --scale
twolame_set_scale( encopts, atof(optarg) );
break;
case 1001: // --scale-l
twolame_set_scale_left( encopts, atof(optarg) );
break;
case 1002: // --scale-r
twolame_set_scale_right( encopts, atof(optarg) );
break;
// Output
case 'm':
if (*optarg == 's') {
twolame_set_mode(encopts, TWOLAME_STEREO);
} else if (*optarg == 'd') {
twolame_set_mode(encopts, TWOLAME_DUAL_CHANNEL);
} else if (*optarg == 'j') {
twolame_set_mode(encopts, TWOLAME_JOINT_STEREO);
} else if (*optarg == 'm') {
twolame_set_mode(encopts, TWOLAME_MONO);
} else if (*optarg == 'a') {
twolame_set_mode(encopts, TWOLAME_AUTO_MODE);
} else {
fprintf(stderr, "Error: mode must be a/s/d/j/m not
'%s'\n\n", optarg);
usage_long();
}
break;
case 'a': // downmix
twolame_set_mode(encopts, TWOLAME_MONO);
break;
case 'b':
twolame_set_bitrate(encopts, atoi(optarg));
break;
case 'P':
twolame_set_psymodel(encopts, atoi(optarg));
break;
case 'v':
twolame_set_VBR(encopts, TRUE);
break;
case 'V':
twolame_set_VBR(encopts, TRUE);
twolame_set_VBR_level(encopts, atof(optarg));
break;
case 'B':
twolame_set_VBR_max_bitrate_kbps(encopts, atoi(optarg));
break;
case 'l':
twolame_set_ATH_level(encopts, atof(optarg));
break;
case 'q':
twolame_set_quick_mode(encopts, TRUE);
twolame_set_quick_count(encopts, atoi(optarg));
break;
case 'S':
single_frame_mode = TRUE;
break;
// Miscellaneous
case 'c':
twolame_set_copyright(encopts, TRUE);
break;
case 'o': // --non-original
twolame_set_original(encopts, FALSE);
break;
case 1003: // --original
twolame_set_original(encopts, TRUE);
break;
case 'p':
twolame_set_error_protection(encopts, TRUE);
break;
case 'd':
twolame_set_padding(encopts, TWOLAME_PAD_ALL);
break;
case 'R':
twolame_set_num_ancillary_bits(encopts, atoi(optarg));
break;
case 'e':
if (*optarg == 'n')
twolame_set_emphasis(encopts, TWOLAME_EMPHASIS_N);
else if (*optarg == '5')
twolame_set_emphasis(encopts, TWOLAME_EMPHASIS_5);
else if (*optarg == 'c')
twolame_set_emphasis(encopts, TWOLAME_EMPHASIS_C);
else {
fprintf(stderr, "Error: emphasis must be n/5/c not
'%s'\n\n", optarg);
usage_long();
}
break;
case 'E':
twolame_set_energy_levels(encopts, TRUE);
break;
// Verbosity
case 't':
twolame_set_verbosity(encopts, atoi(optarg));
break;
case 1004: // --quiet
twolame_set_verbosity(encopts, 0);
break;
case 1005: // --brief
twolame_set_verbosity(encopts, 1);
break;
case 1006: // --verbose
twolame_set_verbosity(encopts, 4);
break;
case 'h':
usage_long();
break;
default:
usage_short();
break;
}
}
// Look for the input and output file names
argc -= optind;
argv += optind;
while( argc ) {
if (inputfilename[0] == '\0')
strncpy(inputfilename, *argv, MAX_NAME_SIZE);
else if (outputfilename[0] == '\0')
strncpy(outputfilename, *argv, MAX_NAME_SIZE);
else {
fprintf(stderr, "excess argument: %s\n", *argv);
usage_short();
}
argv++;
argc--;
}
// Check that we now have input and output file names ok
if ( inputfilename[0] == '\0') {
fprintf(stderr, "Missing input filename.\n");
usage_short();
}
if ( outputfilename[0] == '\0' && strcmp(inputfilename, "-")!=0 ) {
// Create output filename from the inputfilename
// and change the suffix
new_extension( inputfilename, OUTPUT_SUFFIX, outputfilename );
}
if ( outputfilename[0] == '\0') {
fprintf(stderr, "Missing output filename.\n");
usage_short();
}
}
SNDFILE*
open_input_file( char* filename )
{
SNDFILE* file = NULL;
// Do they want STDIN ?
if (strncmp( filename, "-", 1 )==0) {
// We only support raw audio on STDIN
sfinfo.format = SF_FORMAT_RAW | SF_FORMAT_PCM_16;
// Open the file descriptor
file = sf_open_fd(STDIN_FILENO, SFM_READ, &sfinfo, TRUE);
} else {
// Open the input file by filename
file = sf_open(filename, SFM_READ, &sfinfo);
}
// Check for errors
if (file == NULL) {
fprintf(stderr, "Failed to open input file (%s):\n", filename);
fprintf(stderr, " %s\n", sf_strerror(NULL));
exit(ERR_OPENING_INPUT);
}
return file;
}
FILE*
open_output_file( char* filename )
{
FILE* file;
// Do they want STDOUT ?
if (strncmp( filename, "-", 1 )==0) {
file = stdout;
} else {
file = fopen(filename, "w");
}
// Check for errors
if (file == NULL) {
perror("Failed to open output file");
exit(ERR_OPENING_OUTPUT);
}
return file;
}
int
main(int argc, char **argv)
{
twolame_options *encopts = NULL;
SNDFILE *inputfile = NULL;
FILE *outputfile = NULL;
short int *pcmaudio = NULL;
int samples_read = 0;
unsigned int frame_count = 0;
unsigned char *mp2buffer = NULL;
int mp2fill_size = 0;
int audioReadSize = 0;
// Allocate memory for the PCM audio data
if ((pcmaudio = (short int *) calloc(AUDIOBUFSIZE, sizeof(short int))) ==
NULL) {
fprintf(stderr, "Error: pcmaudio memory allocation failed\n");
exit(ERR_MEM_ALLOC);
}
// Allocate memory for the encoded MP2 audio data
if ((mp2buffer = (unsigned char *) calloc(MP2BUFSIZE, sizeof(unsigned
char))) == NULL) {
fprintf(stderr, "Error: mp2buffer memory allocation failed\n");
exit(ERR_MEM_ALLOC);
}
// Initialise Encoder Options Structure
encopts = twolame_init();
if (encopts == NULL) {
fprintf(stderr, "Error: initializing libtwolame encoder failed.\n");
exit(ERR_MEM_ALLOC);
}
// Get options and parameters from the command line
parse_args(argc, argv, encopts);
// Open the input file
inputfile = open_input_file( inputfilename );
twolame_set_num_channels( encopts, sfinfo.channels );
twolame_set_in_samplerate( encopts, sfinfo.samplerate );
// Open the output file
outputfile = open_output_file( outputfilename );
// display file settings
print_file_config( inputfile, twolame_get_verbosity(encopts) );
// initialise twolame with this set of options
if (twolame_init_params( encopts ) != 0) {
fprintf(stderr, "Error: configuring libtwolame encoder failed.\n");
exit(ERR_INVALID_PARAM);
}
// display encoder settings
twolame_print_config( encopts );
// Only encode a single frame of mpeg audio ?
if (single_frame_mode) audioReadSize = 1152;
else audioReadSize = AUDIOBUFSIZE;
// Now do the reading/encoding/writing
while ((samples_read = sf_read_short( inputfile, pcmaudio, audioReadSize ))
> 0) {
int bytes_out = 0;
// Force byte swapping if requested
if (byteswap) {
int i;
for (i = 0; i<samples_read; i++) {
short tmp = pcmaudio[i];
char *src = (char*)&tmp;
char *dst = (char*)&pcmaudio[i];
dst[0] = src[1];
dst[1] = src[0];
}
}
// Calculate the number of samples we have (per channel)
samples_read /= sfinfo.channels;
// Do swapping of left and right channels if requested
if (channelswap && sfinfo.channels == 2) {
int i;
for(i=0; i<samples_read; i++) {
short tmp = pcmaudio[(2*i)];
pcmaudio[(2*i)] = pcmaudio[(2*i)+1];
pcmaudio[(2*i)+1] = tmp;
}
}
// Encode the audio to MP2
mp2fill_size = twolame_encode_buffer_interleaved( encopts, pcmaudio,
samples_read, mp2buffer, MP2BUFSIZE);
// Stop if we don't have any bytes (probably don't have enough audio
for a full frame of mpeg audio)
if (mp2fill_size==0) break;
if (mp2fill_size<0) {
fprintf(stderr,"error while encoding audio: %d\n", mp2fill_size);
exit(ERR_WRITING_OUTPUT);
}
// Write the encoded audio out
bytes_out = fwrite(mp2buffer, sizeof(unsigned char), mp2fill_size,
outputfile);
if (bytes_out<=0) {
perror("error while writing to output file");
exit(ERR_WRITING_OUTPUT);
}
// Only single frame ?
if (single_frame_mode) break;
// Display Progress
frame_count += (samples_read / 1152);
if (twolame_get_verbosity(encopts)>0) {
fprintf(stderr, "[%04i", frame_count);
//fprintf(stderr, "/%04i", (int)(sfinfo.frames /
sfinfo.channels / 1152));
fprintf(stderr, "]\r");
fflush(stderr);
}
}
//
// 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( encopts, mp2buffer, MP2BUFSIZE);
if (mp2fill_size>0) {
int bytes_out = fwrite(mp2buffer, sizeof(unsigned char), mp2fill_size,
outputfile);
if (bytes_out<=0) {
perror("error while writing to output file");
exit(ERR_WRITING_OUTPUT);
}
}
if (twolame_get_verbosity(encopts)>1) {
fprintf(stderr, "\nEncoding Finished.\n");
}
// Close input and output files
sf_close( inputfile );
fclose( outputfile );
// Close the libtwolame encoder
twolame_close(&encopts);
// Free up memory
free(pcmaudio);
free(mp2buffer);
return (ERR_NO_ERROR);
}
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