JNIEXPORT jint JNICALL Java_com_sun_media_sound_PortMixer_nGetPortCount
(JNIEnv *env, jclass cls, jlong id) {
jint ret = 0;
#if USE_PORTS == TRUE
if (id != 0) {
ret = (jint) PORT_GetPortCount((void*) (INT_PTR) id);
}
#endif
return ret;
}
void* PORT_Open(INT32 mixerIndex) {
char devname[16];
snd_mixer_t* mixer_handle;
int err;
PortMixer* handle;
TRACE0("> PORT_Open\n");
sprintf(devname, ALSA_HARDWARE_CARD, (int) mixerIndex);
if ((err = snd_mixer_open(&mixer_handle, 0)) < 0) {
ERROR2("Mixer %s open error: %s", devname, snd_strerror(err));
return NULL;
}
if ((err = snd_mixer_attach(mixer_handle, devname)) < 0) {
ERROR2("Mixer attach %s error: %s", devname, snd_strerror(err));
snd_mixer_close(mixer_handle);
return NULL;
}
if ((err = snd_mixer_selem_register(mixer_handle, NULL, NULL)) < 0) {
ERROR1("Mixer register error: %s", snd_strerror(err));
snd_mixer_close(mixer_handle);
return NULL;
}
err = snd_mixer_load(mixer_handle);
if (err < 0) {
ERROR2("Mixer %s load error: %s", devname, snd_strerror(err));
snd_mixer_close(mixer_handle);
return NULL;
}
handle = (PortMixer*) calloc(1, sizeof(PortMixer));
if (handle == NULL) {
ERROR0("malloc() failed.");
snd_mixer_close(mixer_handle);
return NULL;
}
handle->numElems = 0;
handle->elems = (snd_mixer_elem_t**) calloc(MAX_ELEMS, sizeof(snd_mixer_elem_t*));
if (handle->elems == NULL) {
ERROR0("malloc() failed.");
snd_mixer_close(mixer_handle);
free(handle);
return NULL;
}
handle->types = (INT32*) calloc(MAX_ELEMS, sizeof(INT32));
if (handle->types == NULL) {
ERROR0("malloc() failed.");
snd_mixer_close(mixer_handle);
free(handle->elems);
free(handle);
return NULL;
}
handle->controls = (PortControl*) calloc(MAX_CONTROLS, sizeof(PortControl));
if (handle->controls == NULL) {
ERROR0("malloc() failed.");
snd_mixer_close(mixer_handle);
free(handle->elems);
free(handle->types);
free(handle);
return NULL;
}
handle->mixer_handle = mixer_handle;
// necessary to initialize data structures
PORT_GetPortCount(handle);
TRACE0("< PORT_Open\n");
return handle;
}
