mirror of
https://github.com/cookiengineer/audacity
synced 2025-11-03 23:53:55 +01:00
85 lines
2.4 KiB
C
85 lines
2.4 KiB
C
/*
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* TwoLAME: an optimized MPEG Audio Layer Two encoder
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*
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* Copyright (C) 2004-2007 The TwoLAME Project
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* $Id: frontend.h 156 2007-03-20 23:57:35Z nhumfrey $
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*
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*/
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#include <sndfile.h>
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/*
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Constants
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*/
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#define MP2_BUF_SIZE (16384)
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#define AUDIO_BUF_SIZE (9210)
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#define MAX_NAME_SIZE (1024)
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#define OUTPUT_SUFFIX ".mp2"
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#define DEFAULT_CHANNELS (2)
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#define DEFAULT_SAMPLERATE (44100)
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/*
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Result codes
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*/
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#define ERR_NO_ERROR (0) // No Error (encoded ok)
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#define ERR_NO_ENCODE (1) // No Error (no encoding performed)
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#define ERR_OPENING_INPUT (2) // Error opening input file
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#define ERR_OPENING_OUTPUT (4) // Error opening output file
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#define ERR_MEM_ALLOC (6) // Error allocating memory
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#define ERR_INVALID_PARAM (8) // Error in chosen encoding parameters
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#define ERR_READING_INPUT (10) // Error reading input
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#define ERR_ENCODING (12) // Error occured during encoding
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#define ERR_WRITING_OUTPUT (14) // Error occured writing to output file
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typedef struct audioin_s {
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// Display information about input stream
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void (*print_info) (struct audioin_s *);
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// Read in some audio
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int (*read) (struct audioin_s *, short *buffer, int samples);
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// Return error string (if any)
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const char *(*error_str) (struct audioin_s *);
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// Close the inout stream
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int (*close) (struct audioin_s *);
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// Pointer to file / input stream
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void *file;
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// Pointer to linsndfile info structure
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SF_INFO *sfinfo;
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// Size of the samples (in bits)
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int samplesize;
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} audioin_t;
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/* Initialisers */
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audioin_t *open_audioin_sndfile(char *filename, SF_INFO * sfinfo);
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audioin_t *open_audioin_raw(char *filename, SF_INFO * sfinfo, int samplesize);
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