/*static*/ int
opensl_init(cubeb ** context, char const * context_name)
{
cubeb * ctx;
#if defined(__ANDROID__)
int android_version = get_android_version();
if (android_version > 0 && android_version <= ANDROID_VERSION_GINGERBREAD_MR1) {
// Don't even attempt to run on Gingerbread and lower
return CUBEB_ERROR;
}
#endif
*context = NULL;
ctx = calloc(1, sizeof(*ctx));
assert(ctx);
ctx->ops = &opensl_ops;
ctx->lib = dlopen("libOpenSLES.so", RTLD_LAZY);
ctx->libmedia = dlopen("libmedia.so", RTLD_LAZY);
if (!ctx->lib || !ctx->libmedia) {
free(ctx);
return CUBEB_ERROR;
}
/* Get the latency, in ms, from AudioFlinger */
/* status_t AudioSystem::getOutputLatency(uint32_t* latency,
* audio_stream_type_t streamType) */
/* First, try the most recent signature. */
ctx->get_output_latency =
dlsym(ctx->libmedia, "_ZN7android11AudioSystem16getOutputLatencyEPj19audio_stream_type_t");
if (!ctx->get_output_latency) {
/* in case of failure, try the legacy version. */
/* status_t AudioSystem::getOutputLatency(uint32_t* latency,
* int streamType) */
ctx->get_output_latency =
dlsym(ctx->libmedia, "_ZN7android11AudioSystem16getOutputLatencyEPji");
if (!ctx->get_output_latency) {
opensl_destroy(ctx);
return CUBEB_ERROR;
}
}
typedef SLresult (*slCreateEngine_t)(SLObjectItf *,
SLuint32,
const SLEngineOption *,
SLuint32,
const SLInterfaceID *,
const SLboolean *);
slCreateEngine_t f_slCreateEngine =
(slCreateEngine_t)dlsym(ctx->lib, "slCreateEngine");
SLInterfaceID SL_IID_ENGINE = *(SLInterfaceID *)dlsym(ctx->lib, "SL_IID_ENGINE");
SLInterfaceID SL_IID_OUTPUTMIX = *(SLInterfaceID *)dlsym(ctx->lib, "SL_IID_OUTPUTMIX");
ctx->SL_IID_VOLUME = *(SLInterfaceID *)dlsym(ctx->lib, "SL_IID_VOLUME");
ctx->SL_IID_BUFFERQUEUE = *(SLInterfaceID *)dlsym(ctx->lib, "SL_IID_BUFFERQUEUE");
#if defined(__ANDROID__)
ctx->SL_IID_ANDROIDCONFIGURATION = *(SLInterfaceID *)dlsym(ctx->lib, "SL_IID_ANDROIDCONFIGURATION");
#endif
ctx->SL_IID_PLAY = *(SLInterfaceID *)dlsym(ctx->lib, "SL_IID_PLAY");
if (!f_slCreateEngine ||
!SL_IID_ENGINE ||
!SL_IID_OUTPUTMIX ||
!ctx->SL_IID_BUFFERQUEUE ||
#if defined(__ANDROID__)
!ctx->SL_IID_ANDROIDCONFIGURATION ||
#endif
!ctx->SL_IID_PLAY) {
opensl_destroy(ctx);
return CUBEB_ERROR;
}
const SLEngineOption opt[] = {{SL_ENGINEOPTION_THREADSAFE, SL_BOOLEAN_TRUE}};
SLresult res;
res = cubeb_get_sles_engine(&ctx->engObj, 1, opt, 0, NULL, NULL);
if (res != SL_RESULT_SUCCESS) {
opensl_destroy(ctx);
return CUBEB_ERROR;
}
res = cubeb_realize_sles_engine(ctx->engObj);
if (res != SL_RESULT_SUCCESS) {
opensl_destroy(ctx);
return CUBEB_ERROR;
}
res = (*ctx->engObj)->GetInterface(ctx->engObj, SL_IID_ENGINE, &ctx->eng);
if (res != SL_RESULT_SUCCESS) {
opensl_destroy(ctx);
return CUBEB_ERROR;
}
const SLInterfaceID idsom[] = {SL_IID_OUTPUTMIX};
const SLboolean reqom[] = {SL_BOOLEAN_TRUE};
res = (*ctx->eng)->CreateOutputMix(ctx->eng, &ctx->outmixObj, 1, idsom, reqom);
if (res != SL_RESULT_SUCCESS) {
opensl_destroy(ctx);
return CUBEB_ERROR;
}
res = (*ctx->outmixObj)->Realize(ctx->outmixObj, SL_BOOLEAN_FALSE);
if (res != SL_RESULT_SUCCESS) {
opensl_destroy(ctx);
return CUBEB_ERROR;
}
*context = ctx;
return CUBEB_OK;
}
int main()
{
char* vers_string = get_android_version();
printf("string: %s\n", vers_string);
return 0;
}
