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/*
* TwoLAME: an optimized MPEG Audio Layer Two encoder
*
* Copyright (C) 2004-2007 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
*
* $Id: frontend.h 156 2007-03-20 23:57:35Z nhumfrey $
*
*/
#include <sndfile.h>
/*
Constants
*/
#define MP2_BUF_SIZE (16384)
#define AUDIO_BUF_SIZE (9210)
#define MAX_NAME_SIZE (1024)
#define OUTPUT_SUFFIX ".mp2"
#define DEFAULT_CHANNELS (2)
#define DEFAULT_SAMPLERATE (44100)
/*
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
typedef struct audioin_s {
// Display information about input stream
void (*print_info) (struct audioin_s *);
// Read in some audio
int (*read) (struct audioin_s *, short *buffer, int samples);
// Return error string (if any)
const char *(*error_str) (struct audioin_s *);
// Close the inout stream
int (*close) (struct audioin_s *);
// Pointer to file / input stream
void *file;
// Pointer to linsndfile info structure
SF_INFO *sfinfo;
// Size of the samples (in bits)
int samplesize;
} audioin_t;
/* Initialisers */
audioin_t *open_audioin_sndfile(char *filename, SF_INFO * sfinfo);
audioin_t *open_audioin_raw(char *filename, SF_INFO * sfinfo, int samplesize);
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