94 lines
2.3 KiB
C++
94 lines
2.3 KiB
C++
#include <dlfcn.h>
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#include <errno.h>
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#include "base/logging.h"
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#include "android/native_audio.h"
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#include "android/native-audio-so.h"
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struct AudioState {
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void *so;
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AndroidAudioCallback s_cb;
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OpenSLWrap_Init_T init_func;
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OpenSLWrap_Shutdown_T shutdown_func;
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bool playing;
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int frames_per_buffer;
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int sample_rate;
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};
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static AudioState *state = 0;
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bool AndroidAudio_Init(AndroidAudioCallback cb, std::string libraryDir, int optimalFramesPerBuffer, int optimalSampleRate) {
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if (state != 0) {
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ELOG("Audio state already exists");
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return false;
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}
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ILOG("Loading native audio library...");
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std::string so_filename = libraryDir + "/libnative_audio.so";
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void *the_so = dlopen(so_filename.c_str(), RTLD_LAZY);
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if (!the_so) {
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ELOG("Failed to find native audio library: %i: %s ", errno, dlerror());
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return false;
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}
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state = new AudioState();
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state->so = the_so;
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state->s_cb = cb;
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state->playing = false;
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state->init_func = (OpenSLWrap_Init_T)dlsym(state->so, "OpenSLWrap_Init");
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state->shutdown_func = (OpenSLWrap_Shutdown_T)dlsym(state->so, "OpenSLWrap_Shutdown");
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state->frames_per_buffer = optimalFramesPerBuffer ? optimalFramesPerBuffer : 256;
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state->sample_rate = optimalSampleRate ? optimalSampleRate : 44100;
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ILOG("OpenSLWrap init_func: %p shutdown_func: %p", (void *)state->init_func, (void *)state->shutdown_func);
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return true;
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}
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bool AndroidAudio_Resume() {
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if (!state) {
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ELOG("Audio was shutdown, cannot resume!");
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return false;
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}
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if (!state->playing) {
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ILOG("Calling OpenSLWrap_Init_T...");
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bool init_retval = state->init_func(state->s_cb, state->frames_per_buffer, state->sample_rate);
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ILOG("Returned from OpenSLWrap_Init_T");
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state->playing = true;
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return init_retval;
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}
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return false;
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}
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bool AndroidAudio_Pause() {
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if (!state) {
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ELOG("Audio was shutdown, cannot pause!");
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return false;
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}
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if (state->playing) {
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ILOG("Calling OpenSLWrap_Shutdown_T...");
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state->shutdown_func();
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ILOG("Returned from OpenSLWrap_Shutdown_T ...");
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state->playing = false;
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return true;
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}
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return false;
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}
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void AndroidAudio_Shutdown() {
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if (!state) {
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ELOG("Audio already shutdown!");
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return;
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}
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if (state->playing) {
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ELOG("Should not shut down when playing! Something is wrong!");
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}
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ILOG("dlclose");
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dlclose(state->so);
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ILOG("Returned from dlclose");
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state->so = 0;
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delete state;
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state = 0;
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ILOG("OpenSLWrap completely unloaded.");
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}
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