void alsa_read_init(MSFilter *obj){
AlsaReadData *ad=ms_new0(AlsaReadData,1);
ad->pcmdev=NULL;
ad->handle=NULL;
ad->rate=forced_rate!=-1 ? forced_rate : 8000;
ad->nchannels=1;
ad->ticker_synchronizer = ms_ticker_synchronizer_new();
obj->data=ad;
#ifdef THREADED_VERSION
ad->read_started=FALSE;
ad->write_started=FALSE;
ad->bufferizer=ms_bufferizer_new();
ms_mutex_init(&ad->mutex,NULL);
ad->thread=0;
#endif
}
static void sound_read_setup(MSFilter *f){
ms_debug("andsnd_read_preprocess");
msandroid_sound_read_data *d=(msandroid_sound_read_data*)f->data;
jmethodID constructor_id=0;
jmethodID min_buff_size_id;
//jmethodID set_notification_period;
int rc;
JNIEnv *jni_env = ms_get_jni_env();
d->audio_record_class = (jclass)jni_env->NewGlobalRef(jni_env->FindClass("android/media/AudioRecord"));
if (d->audio_record_class == 0) {
ms_error("cannot find android/media/AudioRecord");
return;
}
constructor_id = jni_env->GetMethodID(d->audio_record_class,"<init>", "(IIIII)V");
if (constructor_id == 0) {
ms_error("cannot find AudioRecord (int audioSource, int sampleRateInHz, int channelConfig, int audioFormat, int bufferSizeInBytes)");
return;
}
min_buff_size_id = jni_env->GetStaticMethodID(d->audio_record_class,"getMinBufferSize", "(III)I");
if (min_buff_size_id == 0) {
ms_error("cannot find AudioRecord.getMinBufferSize(int sampleRateInHz, int channelConfig, int audioFormat)");
return;
}
d->buff_size = jni_env->CallStaticIntMethod(d->audio_record_class,min_buff_size_id,d->rate,2/*CHANNEL_CONFIGURATION_MONO*/,2/* ENCODING_PCM_16BIT */);
d->read_chunk_size = d->buff_size/4;
d->buff_size*=2;/*double the size for configuring the recorder: this does not affect latency but prevents "AudioRecordThread: buffer overflow"*/
if (d->buff_size > 0) {
ms_message("Configuring recorder with [%i] bits rate [%i] nchanels [%i] buff size [%i], chunk size [%i]"
,d->bits
,d->rate
,d->nchannels
,d->buff_size
,d->read_chunk_size);
} else {
ms_message("Cannot configure recorder with [%i] bits rate [%i] nchanels [%i] buff size [%i] chunk size [%i]"
,d->bits
,d->rate
,d->nchannels
,d->buff_size
,d->read_chunk_size);
return;
}
d->read_buff = jni_env->NewByteArray(d->buff_size);
d->read_buff = (jbyteArray)jni_env->NewGlobalRef(d->read_buff);
if (d->read_buff == 0) {
ms_error("cannot instanciate read buff");
return;
}
d->audio_record = jni_env->NewObject(d->audio_record_class
,constructor_id
,sdk_version<11?1/*MIC*/:7/*VOICE_COMMUNICATION*/
,d->rate
,2/*CHANNEL_CONFIGURATION_MONO*/
,2/* ENCODING_PCM_16BIT */
,d->buff_size);
d->audio_record = jni_env->NewGlobalRef(d->audio_record);
if (d->audio_record == 0) {
ms_error("cannot instantiate AudioRecord");
return;
}
d->min_avail=-1;
d->read_samples=0;
d->ticker_synchronizer = ms_ticker_synchronizer_new();
d->outgran_ms=20;
d->start_time=-1;
d->framesize=(d->outgran_ms*d->rate)/1000;
d->started=true;
// start reader thread
rc = ms_thread_create(&d->thread_id, 0, (void*(*)(void*))msandroid_read_cb, d);
if (rc){
ms_error("cannot create read thread return code is [%i]", rc);
d->started=false;
}
}
