mirror of https://github.com/sipwise/sems.git
git-svn-id: http://svn.berlios.de/svnroot/repos/sems/trunk@32 8eb893ce-cfd4-0310-b710-fb5ebe64c474sayer/1.4-spce2.6
Raphael Coeffic
20 years ago
parent
3aacc375a6
commit
3d34a388e1
@ -0,0 +1,20 @@
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plug_in_name = mp3
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COREPATH ?=../../core
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LAME_DIR = ./lame-3.96.1
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#module_ldflags = -L$(LAME_DIR)/libmp3lame/.libs
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module_extra_objs = $(LAME_DIR)/libmp3lame/.libs/libmp3lame.a
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module_cflags = -I$(LAME_DIR)/include
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extra_clean =
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include $(COREPATH)/plug-in/Makefile.audio_module
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#.PHONY: clean_libmp3lame
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#clean_libmp3lame:
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# cd $(LAME_DIR); $(MAKE) clean
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$(LAME_DIR)/libmp3lame/.libs/libmp3lame.a:
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cd $(LAME_DIR); ./configure ; $(MAKE)
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@ -0,0 +1,32 @@
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Lame MP3 file writing plug-in for SEMS Readme
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Description
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-----------
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This mp3 plug-in enables MP3 file writing for SEMS. In order to use
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it, you must get the lame library sources first. Files recorded with
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the extension "MP3" or "mp3" are recorded as mp3 if possible.
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Quickstart
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----------
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cd plug-in/mp3 ; wget http://switch.dl.sourceforge.net/sourceforge/lame/lame-3.96.1.tar.gz ;
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tar xzvf lame-3.96.tar.gz ; make
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Installation
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------------
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1) Get lame from lame.sourceforge.net (
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http://sourceforge.net/project/showfiles.php?group_id=290)
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2) Unpack the archive
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3) edit LAME_DIR in mp3 plug-in Makefile to point to the location of
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the unpacked lame source archive
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4) make in plug-in/mp3 directory
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Important Note:
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--------------
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Using the LAME encoding engine (or other mp3 encoding technology) in
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your software may require a patent license in some countries.
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See http://www.mp3licensing.com/ or
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http://lame.sourceforge.net/links.html#patents for further information.
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@ -0,0 +1,251 @@
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/*
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* $Id: mp3.c,v 1.2 2004/06/16 12:30:46 rco Exp $
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*
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* Copyright (C) 2002-2003 Fhg Fokus
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*
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* This file is part of sems, a free SIP media server.
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*
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* sems is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version
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*
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* For a license to use the ser software under conditions
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* other than those described here, or to purchase support for this
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* software, please contact iptel.org by e-mail at the following addresses:
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* info@iptel.org
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*
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* sems 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; 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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#include "amci.h"
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#include "codecs.h"
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#include "log.h"
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#include <math.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "lame.h"
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/**
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* @file plug-in/mp3/mp3.c
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* lame-MP3 support
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* This plug-in writes MP3 files using lame encoder.
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*
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* Set LAME_DIR in Makefile first!
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*
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* See http://lame.sourceforge.net/ .
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*
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*/
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#define MP3_phone 1
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static int MP3_2_Pcm16( unsigned char* out_buf, unsigned char* in_buf, unsigned int size,
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unsigned int channels, unsigned int rate, long h_codec );
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static int Pcm16_2_MP3( unsigned char* out_buf, unsigned char* in_buf, unsigned int size,
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unsigned int channels, unsigned int rate, long h_codec );
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static long MP3_create(const char* format_parameters, amci_codec_fmt_info_t* format_description);
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static void MP3_destroy(long h_inst);
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static int MP3_open(FILE* fp, struct amci_file_desc_t* fmt_desc, int options, long h_codec);
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static int MP3_close(FILE* fp, struct amci_file_desc_t* fmt_desc, int options, long h_codec);
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BEGIN_EXPORTS( "mp3" )
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BEGIN_CODECS
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CODEC( CODEC_MP3, 1, Pcm16_2_MP3, MP3_2_Pcm16, (amci_plc_t)0, (amci_codec_init_t)MP3_create, (amci_codec_destroy_t)MP3_destroy )
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END_CODECS
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BEGIN_PAYLOADS
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END_PAYLOADS
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BEGIN_FILE_FORMATS
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BEGIN_FILE_FORMAT( "MP3", "mp3", "audio/x-mp3", MP3_open, MP3_close)
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BEGIN_SUBTYPES
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SUBTYPE( MP3_phone, "MP3", 8000, 1, CODEC_MP3 )
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END_SUBTYPES
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END_FILE_FORMAT
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END_FILE_FORMATS
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END_EXPORTS
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void no_output(const char *format, va_list ap)
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{
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return;
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// (void) vfprintf(stdout, format, ap);
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}
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long MP3_create(const char* format_parameters, amci_codec_fmt_info_t* format_description) {
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lame_global_flags* gfp;
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int ret_code;
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DBG("MP3: creating lame %s\n", get_lame_version());
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format_description[0].id = 0;
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gfp = lame_init();
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if (!gfp)
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return -1;
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lame_set_errorf(gfp, &no_output);
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lame_set_debugf(gfp, &no_output);
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lame_set_msgf(gfp, &no_output);
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lame_set_num_channels(gfp,1);
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lame_set_in_samplerate(gfp,8000);
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lame_set_brate(gfp,16);
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lame_set_mode(gfp,3); // mono
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lame_set_quality(gfp,7); /* 2=high 5 = medium 7=low */
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id3tag_init(gfp);
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id3tag_set_title(gfp, "mp3 voicemail by iptel.org");
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ret_code = lame_init_params(gfp);
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if (ret_code < 0) {
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DBG("lame encoder init failed: return code is %d\n", ret_code);
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return -1;
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}
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return (long)gfp;
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}
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void MP3_destroy(long h_inst) {
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if (h_inst)
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free((lame_global_flags*) h_inst);
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}
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static int Pcm16_2_MP3( unsigned char* out_buf, unsigned char* in_buf, unsigned int size,
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unsigned int channels, unsigned int rate, long h_codec )
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{
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if (!h_codec){
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ERROR("MP3 codec not initialized.\n");
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return 0;
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}
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if ((channels!=1)||(rate!=8000)) {
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ERROR("Unsupported input format for MP3 encoder.\n");
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return 0;
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}
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/* DBG("h_codec=0x%lx; in_buf=0x%lx; size=%i\n", */
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/* (unsigned long)h_codec,(unsigned long)in_buf,size); */
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int ret = lame_encode_buffer((lame_global_flags*)h_codec,
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(short*) in_buf, // left channel
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/* (short*) in_buf */0, // right channel
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size / 2 , // no of samples (size is in bytes!)
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out_buf,
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AUDIO_BUFFER_SIZE);
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switch(ret){
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// 0 is valid: if not enough samples for an mp3
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//frame lame will not return anything
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case 0: /*DBG("lame_encode_buffer returned 0\n");*/ break;
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case -1: ERROR("mp3buf was too small\n"); break;
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case -2: ERROR("malloc() problem\n"); break;
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case -3: ERROR("lame_init_params() not called\n"); break;
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case -4: ERROR("psycho acoustic problems\n"); break;
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}
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return ret;
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}
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static int MP3_2_Pcm16( unsigned char* out_buf, unsigned char* in_buf, unsigned int size,
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unsigned int channels, unsigned int rate, long h_codec )
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{
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ERROR("MP3 decoding not supported yet.\n");
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return -1;
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/* mp3data_struct mp3data; */
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/* int dec_length = 0; */
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/* dec_length = lame_decode( */
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/* in_buf, */
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/* size, */
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/* (short*) out_buf, // left channel */
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/* (short*) out_buf); //right channel -- we assume mono. */
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/* return dec_length*2; // sample size = 2 */
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}
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#define SAFE_READ(buf,s,fp,sr) \
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sr = fread(buf,s,1,fp);\
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if((sr != 1) || ferror(fp)) return -1;
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#define SAFE_WRITE(buf,s,fp) \
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fwrite(buf,s,1,fp);\
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if(ferror(fp)) return -1;
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static int MP3_open(FILE* fp, struct amci_file_desc_t* fmt_desc, int options, long h_codec)
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{
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// mp3data_struct mp3data;
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// unsigned char* mp_hdr;
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// short* dummy_pcm;
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DBG("mp3_open.\n");
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if(options == AMCI_RDONLY){
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ERROR("Sorry, MP3 file reading is not supported yet.\n");
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return -1;
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/* if (!(mp_hdr = malloc(0x80))) { */
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/* ERROR("MP3: could not allocate memory for mp3 header decode.\n"); */
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/* return -1; */
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/* } */
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/* if (!(dummy_pcm = malloc(320*2))) { */
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/* ERROR("MP3: could not allocate memory for mp3 header decode.\n"); */
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/* return -1; */
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/* } */
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/* SAFE_READ(mp_hdr, 1, 0x80, fp); */
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/* if (lame_decode_headers(mp_hdr, 0x80, dummy_pcm, dummy_pcm, &mp3data)==-1) { */
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/* ERROR("MP3: cannot decode MP3 header."); */
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/* return -1; */
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/* } */
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/* if (mp3data.header_parsed) { */
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/* fmt_desc->subtype = 1; */
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/* fmt_desc->sample = 2; */
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/* fmt_desc->rate = mp3data.bitrate; */
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/* fmt_desc->channels = mp3data.stereo; */
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/* } else { */
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/* ERROR("MP3: header could not be parsed.\n"); */
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/* } */
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/* free(mp_hdr); */
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/* free(dummy_pcm); */
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/* return 0; */
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} else {
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return 0;
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}
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return 0;
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}
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static int MP3_close(FILE* fp, struct amci_file_desc_t* fmt_desc, int options, long h_codec)
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{
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int final_samples;
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char mp3buffer[7200];
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DBG("MP3: close. \n");
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if(options == AMCI_WRONLY) {
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if ((final_samples = lame_encode_flush((lame_global_flags *)h_codec,mp3buffer, 7200))) {
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fwrite(mp3buffer, 1, final_samples, fp);
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DBG("MP3: flushing %d bytes from MP3 encoder.\n", final_samples);
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}
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lame_mp3_tags_fid((lame_global_flags *)h_codec,fp);
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}
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return 0;
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}
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