int SDL_Android_AudioTrack_reserve_float_buffer(JNIEnv *env, SDL_Android_AudioTrack *atrack, int size_in_float)
{
if (atrack->float_buffer && size_in_float <= atrack->float_buffer_capacity)
return size_in_float;
if (atrack->float_buffer) {
(*env)->DeleteGlobalRef(env, atrack->float_buffer);
atrack->float_buffer = NULL;
atrack->float_buffer_capacity = 0;
}
int capacity = IJKMAX(size_in_float, ((atrack->min_buffer_size + sizeof(jfloat) - 1) / sizeof(jfloat)));
jbyteArray float_buffer = (*env)->NewFloatArray(env, capacity);
if (!float_buffer || (*env)->ExceptionCheck(env)) {
ALOGE("%s: NewFloatArray: Exception:\n", __func__);
if ((*env)->ExceptionCheck(env)) {
(*env)->ExceptionDescribe(env);
(*env)->ExceptionClear(env);
}
return -1;
}
atrack->float_buffer_capacity = capacity;
atrack->float_buffer = (*env)->NewGlobalRef(env, float_buffer);
(*env)->DeleteLocalRef(env, float_buffer);
return capacity;
}
int SDL_Android_AudioTrack_reserve_byte_buffer(JNIEnv *env, SDL_Android_AudioTrack *atrack, int size_in_byte)
{
if (atrack->byte_buffer && size_in_byte <= atrack->byte_buffer_capacity)
return size_in_byte;
if (atrack->byte_buffer) {
(*env)->DeleteGlobalRef(env, atrack->byte_buffer);
atrack->byte_buffer = NULL;
atrack->byte_buffer_capacity = 0;
}
int capacity = IJKMAX(size_in_byte, atrack->min_buffer_size);
jbyteArray byte_buffer = (*env)->NewByteArray(env, capacity);
if (!byte_buffer || (*env)->ExceptionCheck(env)) {
ALOGE("%s: NewByteArray: Exception:", __func__);
if ((*env)->ExceptionCheck(env)) {
(*env)->ExceptionDescribe(env);
(*env)->ExceptionClear(env);
}
return -1;
}
atrack->byte_buffer_capacity = capacity;
atrack->byte_buffer = (*env)->NewGlobalRef(env, byte_buffer);
(*env)->DeleteLocalRef(env, byte_buffer);
return capacity;
}
int SDL_Android_AudioTrack_reserve_byte_buffer(JNIEnv *env, SDL_Android_AudioTrack *atrack, int size_in_byte)
{
if (atrack->byte_buffer && size_in_byte <= atrack->byte_buffer_capacity)
return size_in_byte;
JJK_DeleteGlobalRef__p(env, &atrack->byte_buffer);
atrack->byte_buffer_capacity = 0;
int capacity = IJKMAX(size_in_byte, atrack->min_buffer_size);
atrack->byte_buffer = JJK_NewByteArray__asGlobalRef__catchAll(env, capacity);
if (!atrack->byte_buffer)
return -1;
atrack->byte_buffer_capacity = capacity;
return capacity;
}
SDL_Android_AudioTrack *SDL_Android_AudioTrack_new_from_spec(JNIEnv *env, SDL_Android_AudioTrack_Spec *spec)
{
assert(spec);
jint sdk_int = SDL_Android_GetApiLevel();
switch (spec->channel_config) {
case CHANNEL_OUT_MONO:
ALOGI("SDL_Android_AudioTrack: %s", "CHANNEL_OUT_MONO");
break;
case CHANNEL_OUT_STEREO:
ALOGI("SDL_Android_AudioTrack: %s", "CHANNEL_OUT_STEREO");
break;
default:
ALOGE("SDL_Android_AudioTrack_new_from_spec: invalid channel %d", spec->channel_config);
return NULL;
}
switch (spec->audio_format) {
case ENCODING_PCM_16BIT:
ALOGI("SDL_Android_AudioTrack: %s", "ENCODING_PCM_16BIT");
break;
case ENCODING_PCM_8BIT:
ALOGI("SDL_Android_AudioTrack: %s", "ENCODING_PCM_8BIT");
break;
case ENCODING_PCM_FLOAT:
ALOGI("SDL_Android_AudioTrack: %s", "ENCODING_PCM_FLOAT");
if (sdk_int < IJK_API_21_LOLLIPOP) {
ALOGI("SDL_Android_AudioTrack: %s need API 21 or above", "ENCODING_PCM_FLOAT");
return NULL;
}
break;
default:
ALOGE("SDL_Android_AudioTrack_new_from_spec: invalid format %d", spec->audio_format);
return NULL;
}
SDL_Android_AudioTrack *atrack = (SDL_Android_AudioTrack*) mallocz(sizeof(SDL_Android_AudioTrack));
if (!atrack) {
(*env)->CallVoidMethod(env, atrack->thiz, g_clazz.release);
return NULL;
}
atrack->spec = *spec;
if (atrack->spec.sample_rate_in_hz < 4000 || atrack->spec.sample_rate_in_hz > 48000) {
int native_sample_rate_in_hz = audiotrack_get_native_output_sample_rate(env);
if (native_sample_rate_in_hz > 0) {
ALOGE("SDL_Android_AudioTrack_new: cast sample rate %d to %d:",
atrack->spec.sample_rate_in_hz,
native_sample_rate_in_hz);
atrack->spec.sample_rate_in_hz = native_sample_rate_in_hz;
}
}
int min_buffer_size = audiotrack_get_min_buffer_size(env, &atrack->spec);
if (min_buffer_size <= 0) {
ALOGE("SDL_Android_AudioTrack_new: SDL_Android_AudioTrack_get_min_buffer_size: return %d:", min_buffer_size);
free(atrack);
return NULL;
}
jobject thiz = (*env)->NewObject(env, g_clazz.clazz, g_clazz.constructor,
(int) atrack->spec.stream_type,
(int) atrack->spec.sample_rate_in_hz,
(int) atrack->spec.channel_config,
(int) atrack->spec.audio_format,
(int) min_buffer_size,
(int) atrack->spec.mode);
if (!thiz || (*env)->ExceptionCheck(env)) {
ALOGE("SDL_Android_AudioTrack_new: NewObject: Exception:");
if ((*env)->ExceptionCheck(env)) {
(*env)->ExceptionDescribe(env);
(*env)->ExceptionClear(env);
}
free(atrack);
return NULL;
}
atrack->min_buffer_size = min_buffer_size;
atrack->spec.buffer_size_in_bytes = min_buffer_size;
atrack->max_volume = audiotrack_get_max_volume(env);
atrack->min_volume = audiotrack_get_min_volume(env);
atrack->thiz = (*env)->NewGlobalRef(env, thiz);
(*env)->DeleteLocalRef(env, thiz);
// extra init
float init_volume = 1.0f;
init_volume = IJKMIN(init_volume, atrack->max_volume);
init_volume = IJKMAX(init_volume, atrack->min_volume);
ALOGI("SDL_Android_AudioTrack_new: init volume as %f/(%f,%f)", init_volume, atrack->min_volume, atrack->max_volume);
audiotrack_set_stereo_volume(env, atrack, init_volume, init_volume);
return atrack;
}
SDL_Android_AudioTrack *SDL_Android_AudioTrack_new_from_spec(JNIEnv *env, SDL_Android_AudioTrack_Spec *spec)
{
assert(spec);
switch (spec->channel_config) {
case CHANNEL_OUT_MONO:
ALOGI("SDL_Android_AudioTrack: %s", "CHANNEL_OUT_MONO");
break;
case CHANNEL_OUT_STEREO:
ALOGI("SDL_Android_AudioTrack: %s", "CHANNEL_OUT_STEREO");
break;
default:
ALOGE("%s: invalid channel %d", __func__, spec->channel_config);
return NULL;
}
switch (spec->audio_format) {
case ENCODING_PCM_16BIT:
ALOGI("SDL_Android_AudioTrack: %s", "ENCODING_PCM_16BIT");
break;
case ENCODING_PCM_8BIT:
ALOGI("SDL_Android_AudioTrack: %s", "ENCODING_PCM_8BIT");
break;
#if 0
case ENCODING_PCM_FLOAT:
ALOGI("SDL_Android_AudioTrack: %s", "ENCODING_PCM_FLOAT");
if (sdk_int < IJK_API_21_LOLLIPOP) {
ALOGI("SDL_Android_AudioTrack: %s need API 21 or above", "ENCODING_PCM_FLOAT");
return NULL;
}
break;
#endif
default:
ALOGE("%s: invalid format %d", __func__, spec->audio_format);
return NULL;
}
if (spec->sample_rate_in_hz <= 0) {
ALOGE("%s: invalid sample rate %d", __func__, spec->sample_rate_in_hz);
return NULL;
}
SDL_Android_AudioTrack *atrack = (SDL_Android_AudioTrack*) mallocz(sizeof(SDL_Android_AudioTrack));
if (!atrack) {
ALOGE("%s: mallocz faild.\n", __func__);
return NULL;
}
atrack->spec = *spec;
// libswresample is ugly, depending on native resampler
while (atrack->spec.sample_rate_in_hz < 4000) {
atrack->spec.sample_rate_in_hz *= 2;
}
while (atrack->spec.sample_rate_in_hz > 48000) {
atrack->spec.sample_rate_in_hz /= 2;
}
int min_buffer_size = JJKC_AudioTrack__getMinBufferSize(env,
atrack->spec.sample_rate_in_hz,
atrack->spec.channel_config,
atrack->spec.audio_format);
if (JJK_ExceptionCheck__catchAll(env) || min_buffer_size <= 0) {
ALOGE("%s: JJKC_AudioTrack__getMinBufferSize: return %d:", __func__, min_buffer_size);
free(atrack);
return NULL;
}
if (JJK_GetSystemAndroidApiLevel(env) >= 23) {
// for fast playback
min_buffer_size *= 2;
}
atrack->thiz = JJKC_AudioTrack__AudioTrack__asGlobalRef__catchAll(env,
atrack->spec.stream_type,
atrack->spec.sample_rate_in_hz,
atrack->spec.channel_config,
atrack->spec.audio_format,
min_buffer_size,
atrack->spec.mode);
if (!atrack->thiz) {
free(atrack);
return NULL;
}
atrack->min_buffer_size = min_buffer_size;
atrack->spec.buffer_size_in_bytes = min_buffer_size;
// atrack->max_volume = JJKC_AudioTrack__getMaxVolume__catchAll(env);
// atrack->min_volume = JJKC_AudioTrack__getMinVolume__catchAll(env);
atrack->max_volume = 0.0f;
atrack->min_volume = 1.0f;
// extra init
float init_volume = 1.0f;
init_volume = IJKMIN(init_volume, atrack->max_volume);
init_volume = IJKMAX(init_volume, atrack->min_volume);
ALOGI("%s: init volume as %f/(%f,%f)", __func__, init_volume, atrack->min_volume, atrack->max_volume);
JJKC_AudioTrack__setStereoVolume__catchAll(env, atrack->thiz, init_volume, init_volume);
return atrack;
}