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Android: MIDI support

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This commit is contained in:
kichikuou
2020-02-15 23:01:23 +09:00
parent 487bd49745
commit 4aa5cc5bfd
5 changed files with 78 additions and 28 deletions
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src/android/mako.cpp
+68 -22
View File
@@ -1,14 +1,44 @@
#include <memory>
#include <SDL.h>
#include <android/log.h>
#include <jni.h>
#include "mako.h"
#include "mako_midi.h"
MAKO::MAKO(NACT* parent, const char* playlist)
: current_music(0)
, next_loop(0)
class JNILocalFrame {
public:
JNILocalFrame(int n) :
env_((JNIEnv*)SDL_AndroidGetJNIEnv()),
context_((jobject)SDL_AndroidGetActivity())
{
if (env_->PushLocalFrame(n) < 0) {
ERROR("Failed to allocate JVM local references");
env_ = NULL;
}
}
~JNILocalFrame() {
if (env_)
env_->PopLocalFrame(NULL);
}
JNIEnv* env() { return env_; }
jobject context() { return context_; }
jmethodID GetMethodID(const char* name, const char* sig) {
return env_->GetMethodID(env_->GetObjectClass(context_), name, sig);
}
private:
JNIEnv* env_;
jobject context_;
};
MAKO::MAKO(NACT* parent, const char* playlist) :
current_music(0),
next_loop(0),
nact(parent)
{
strcpy(amus, "AMUS.DAT");
for (int i = 1; i <= 99; i++)
cd_track[i] = i;
cd_track[i] = 0;
}
void MAKO::play_music(int page)
@@ -16,17 +46,33 @@ void MAKO::play_music(int page)
if (current_music == page)
return;
JNIEnv* env = (JNIEnv*)SDL_AndroidGetJNIEnv();
if (env->PushLocalFrame(16) < 0) {
__android_log_write(ANDROID_LOG_ERROR, "system3",
"Failed to allocate JVM local references");
JNILocalFrame jni(16);
if (!jni.env())
return;
int track = page < 100 ? cd_track[page] : 0;
if (track) {
jmethodID mid = jni.GetMethodID("cddaStart", "(IZ)V");
jni.env()->CallVoidMethod(jni.context(), mid, track + 1, next_loop ? 0 : 1);
} else {
auto midi = std::make_unique<MAKOMidi>(nact, amus);
if (!midi->load_mml(page)) {
WARNING("load_mml(%d) failed", page);
return;
}
midi->load_mda(page);
std::vector<uint8_t> smf = midi->generate_smf(next_loop);
jbyteArray array = jni.env()->NewByteArray(smf.size());
if (!array) {
WARNING("Failed to allocate an array");
return;
}
jbyte *buf = jni.env()->GetByteArrayElements(array, NULL);
memcpy(buf, smf.data(), smf.size());
jni.env()->ReleaseByteArrayElements(array, buf, 0);
jmethodID mid = jni.GetMethodID("midiStart", "([BZ)V");
jni.env()->CallVoidMethod(jni.context(), mid, array, next_loop ? 0 : 1);
}
jobject context = (jobject)SDL_AndroidGetActivity();
jmethodID mid = env->GetMethodID(env->GetObjectClass(context),
"cddaStart", "(IZ)V");
env->CallVoidMethod(context, mid, cd_track[page] + 1, next_loop ? 0 : 1);
env->PopLocalFrame(NULL);
current_music = page;
next_loop = 0;
@@ -37,17 +83,17 @@ void MAKO::stop_music()
if (!current_music)
return;
JNIEnv* env = (JNIEnv*)SDL_AndroidGetJNIEnv();
if (env->PushLocalFrame(16) < 0) {
__android_log_write(ANDROID_LOG_ERROR, "system3",
"Failed to allocate JVM local references");
JNILocalFrame jni(16);
if (!jni.env())
return;
if (current_music < 100 && cd_track[current_music]) {
jmethodID mid = jni.GetMethodID("cddaStop", "()V");
jni.env()->CallVoidMethod(jni.context(), mid);
} else {
jmethodID mid = jni.GetMethodID("midiStop", "()V");
jni.env()->CallVoidMethod(jni.context(), mid);
}
jobject context = (jobject)SDL_AndroidGetActivity();
jmethodID mid = env->GetMethodID(env->GetObjectClass(context),
"cddaStop", "()V");
env->CallVoidMethod(context, mid);
env->PopLocalFrame(NULL);
current_music = 0;
}