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Modules/sound/gsm_recorder.c
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240
Modules/sound/gsm_recorder.c
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/*
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gsm_recorder.c
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*
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* Copyright (c) 2000, Ted Nelson, Tuomas Lukka and Vesa Parkkinen
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*
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* You may use and distribute under the terms of either the GNU Lesser
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* General Public License, either version 2 of the license or,
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* at your choice, any later version. Alternatively, you may use and
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* distribute under the terms of the XPL.
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*
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* See the LICENSE.lgpl and LICENSE.xpl files for the specific terms of
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* the licenses.
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*
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* This software 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 README
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* file for more details.
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*
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*/
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/*
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* Written by Vesa Parkkinen
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*/
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/**
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* simple gsm recorder
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*/
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/****************************************************
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* INCLUDES
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****************************************************/
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include <time.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <sys/soundcard.h>
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#include <pthread.h>
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#include <gsm/gsm.h>
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#include "jni.h"
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#include "org_gzigzag_module_SimpleRecorder.h"
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#include "gsm_def.h"
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/****************************************************
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* DEFINES
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****************************************************/
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#define DEVICE "/dev/dsp"
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#define DEFAULT_DSP_SPEED 8000
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#define DEFAULT_DSP_FRAG 0
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#define DEFAULT_DSP_SAMPLE
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#define RECS 10
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#define READ_BLOCK 1280
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#define BUFFER_SIZE 20 * READ_BLOCK
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#define GSM_RECORDER_DEBUG 1
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//#define ENCODED_SIZE 20 * READ_BLOCK
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#ifndef uint
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#define uint unsigned int
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#endif
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#ifndef ulong
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#define ulong unsigned long
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#endif
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#ifndef DEBUG_SOUND
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#define DEBUG_SOUND 0
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#endif
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#define DEBUG(s) if(DEBUG_SOUND)printf(s);
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/****************************************************
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* STRUCTS
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****************************************************/
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/**
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* Recording
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* Struct to hold infomation about recordings.
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*/
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typedef struct {
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char *file; // file to save to
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int audio; // handle to audio device
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int speed;
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int samplesize;
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int fragsize;
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int channels; // mono 1, stereo 2
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ulong offset; // bytes from beginning
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int format;
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int stop;
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} Recording;
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Recording *recs[RECS];
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int cur_rec = 0;
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/**
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*
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*/
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int init_recording(Recording *rec){
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rec->file = "/tmp/sndscroll";
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rec->audio = 0;
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rec->speed = 8000;
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rec->samplesize = 8;
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rec->fragsize = 0; // not used at the moment
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rec->channels = 1;
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rec->offset = 0;
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rec->stop = 0;
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return 0;
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}
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/**
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* Creates a new recording structure, and increments
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* curr_rec by 1.
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* @return a pointer to new Recording struvct or NULL
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*/
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Recording *new_recording(int *rn){
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Recording *r = (Recording *) malloc(sizeof(Recording));
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cur_rec++;
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recs[cur_rec] = r;
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*rn = cur_rec;
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return r;
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}
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/**
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* Initializes the recording device.
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*/
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int init_device(const char *file){
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int rn = 0;
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Recording *r = new_recording(&rn);
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init_recording(r);
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r->file = strdup(file);
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r->stop = -1;
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DEBUG("init device\n");
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if ( (r->audio = open(DEVICE, O_RDONLY) ) < 0 ) {
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perror("OPEN FAILED");
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}
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DEBUG("opened device\n");
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if( ioctl(r->audio, SNDCTL_DSP_SAMPLESIZE, &r->samplesize) == -1){
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perror("SNDCTL_DSP_SAMPLESIZE");
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return -1;
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}
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if (ioctl(r->audio, SNDCTL_DSP_CHANNELS, &r->channels) == -1) {
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perror("SNDCTL_DSP_CHANNELS");
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return -1;
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}
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if (ioctl (r->audio, SNDCTL_DSP_SPEED, &r->speed) == -1){
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perror("set speed failed");
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}
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DEBUG("initialized device\n");
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return rn;
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}
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/*******************************************************************
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* GET CURRENT OFFSET *
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*******************************************************************/
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JNIEXPORT jlong JNICALL
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Java_org_gzigzag_module_SimpleRecorder_recorder_1getCurrentOffset
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(JNIEnv *env, jobject obj , jint handle){
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Recording *r = recs[handle];
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if( r == NULL ) return 0;
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return r->offset;
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}
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/*******************************************************************
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* INIT *
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*******************************************************************/
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JNIEXPORT jint JNICALL Java_org_gzigzag_module_SimpleRecorder_recorder_1init
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(JNIEnv *env, jobject obj, jstring file, jlong offset){
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int rv=0;
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const char *fn = (const char *)(*env)->GetStringUTFChars(env, file, 0);
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rv = init_device(fn);
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(*env)->ReleaseStringUTFChars(env, file, fn);
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recs[rv]->offset = offset;
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return rv;
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}
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/*******************************************************************
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* STOP *
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*******************************************************************/
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JNIEXPORT void JNICALL Java_org_gzigzag_module_SimpleRecorder_recorder_1stop
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(JNIEnv *env, jobject obj, jint handle){
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Recording *r = recs[handle];
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if ( r == NULL) return ;
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r->stop = 1;
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}
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/*******************************************************************
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* START *
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*******************************************************************/
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JNIEXPORT void JNICALL Java_org_gzigzag_module_SimpleRecorder_recorder_1start
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(JNIEnv *env, jobject obj, jint handle){
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int fd = 0;
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char *audiobuf;
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gsm gsm = gsm_create();
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gsm_signal sample[160];
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gsm_frame frame;
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Recording *r = recs[handle];
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if ((fd = open (r->file, O_WRONLY | O_CREAT, 0666)) == -1){
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perror("recorder start: open failed");
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return ;
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}
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lseek(fd, r->offset, SEEK_SET);
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while ( r->stop < 1 ){
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read (r->audio, sample, sizeof(sample) );
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gsm_encode(gsm, sample, frame);
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// write
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if (write (fd, frame, sizeof(frame)) != sizeof(frame)){
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perror("write failed");
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//exit (-1);
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return ;
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}
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r->offset += sizeof(frame);
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}
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if (fd != 1)
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close (fd);
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close( r->audio );
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gsm_destroy(gsm);
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printf("recorded\n");
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}
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