fix slow get caps

When get caps is called on an MediaCodec object, try to
use the codec info for that MediaCodec first as it should
be available during codec construction. Only when that
somehow failed go and initialize the full MediaCodecList,
as building the entire list could be very slow.

And when cloning the CodecCapabilities from MediaCodecInfo,
copy the fields directly and the fields (other than the ones
modifiable by client) are immutable after construction.

bug: 74073607

Test:
CTS media post submit:
cts-tradefed run cts-dev --module CtsMediaTestCases --compatibility:module-arg CtsMediaTestCases:include-annotation:android.platform.test.annotations.RequiresDevice

Change-Id: I4ae5f2431da8528e1eca093c5cfb98abcb4a5bbf
diff --git a/media/jni/android_media_MediaCodec.cpp b/media/jni/android_media_MediaCodec.cpp
index a1022c0..000317e 100644
--- a/media/jni/android_media_MediaCodec.cpp
+++ b/media/jni/android_media_MediaCodec.cpp
@@ -29,6 +29,7 @@
 #include "android_util_Binder.h"
 #include "jni.h"
 #include <nativehelper/JNIHelp.h>
+#include <nativehelper/ScopedLocalRef.h>
 
 #include <android/hardware/cas/native/1.0/IDescrambler.h>
 
@@ -98,6 +99,13 @@
     jint AesCbc;
 } gCryptoModes;
 
+static struct {
+    jclass capsClazz;
+    jmethodID capsCtorId;
+    jclass profileLevelClazz;
+    jfieldID profileField;
+    jfieldID levelField;
+} gCodecInfo;
 
 struct fields_t {
     jfieldID context;
@@ -625,6 +633,103 @@
     return OK;
 }
 
+static jobject getCodecCapabilitiesObject(
+        JNIEnv *env, const char *mime, bool isEncoder,
+        const sp<MediaCodecInfo::Capabilities> &capabilities) {
+    Vector<MediaCodecInfo::ProfileLevel> profileLevels;
+    Vector<uint32_t> colorFormats;
+
+    sp<AMessage> defaultFormat = new AMessage();
+    defaultFormat->setString("mime", mime);
+
+    capabilities->getSupportedColorFormats(&colorFormats);
+    capabilities->getSupportedProfileLevels(&profileLevels);
+    uint32_t flags = capabilities->getFlags();
+    sp<AMessage> details = capabilities->getDetails();
+
+    jobject defaultFormatObj = NULL;
+    if (ConvertMessageToMap(env, defaultFormat, &defaultFormatObj)) {
+        return NULL;
+    }
+    ScopedLocalRef<jobject> defaultFormatRef(env, defaultFormatObj);
+
+    jobject detailsObj = NULL;
+    if (ConvertMessageToMap(env, details, &detailsObj)) {
+        return NULL;
+    }
+    ScopedLocalRef<jobject> detailsRef(env, detailsObj);
+
+    ScopedLocalRef<jobjectArray> profileLevelArray(env, env->NewObjectArray(
+            profileLevels.size(), gCodecInfo.profileLevelClazz, NULL));
+
+    for (size_t i = 0; i < profileLevels.size(); ++i) {
+        const MediaCodecInfo::ProfileLevel &src = profileLevels.itemAt(i);
+
+        ScopedLocalRef<jobject> srcRef(env, env->AllocObject(
+                gCodecInfo.profileLevelClazz));
+
+        env->SetIntField(srcRef.get(), gCodecInfo.profileField, src.mProfile);
+        env->SetIntField(srcRef.get(), gCodecInfo.levelField, src.mLevel);
+
+        env->SetObjectArrayElement(profileLevelArray.get(), i, srcRef.get());
+    }
+
+    ScopedLocalRef<jintArray> colorFormatsArray(
+            env, env->NewIntArray(colorFormats.size()));
+    for (size_t i = 0; i < colorFormats.size(); ++i) {
+        jint val = colorFormats.itemAt(i);
+        env->SetIntArrayRegion(colorFormatsArray.get(), i, 1, &val);
+    }
+
+    return env->NewObject(
+            gCodecInfo.capsClazz, gCodecInfo.capsCtorId,
+            profileLevelArray.get(), colorFormatsArray.get(), isEncoder, flags,
+            defaultFormatRef.get(), detailsRef.get());
+}
+
+status_t JMediaCodec::getCodecInfo(JNIEnv *env, jobject *codecInfoObject) const {
+    sp<MediaCodecInfo> codecInfo;
+
+    status_t err = mCodec->getCodecInfo(&codecInfo);
+
+    if (err != OK) {
+        return err;
+    }
+
+    ScopedLocalRef<jstring> nameObject(env,
+            env->NewStringUTF(codecInfo->getCodecName()));
+
+    bool isEncoder = codecInfo->isEncoder();
+
+    Vector<AString> mimes;
+    codecInfo->getSupportedMimes(&mimes);
+
+    ScopedLocalRef<jobjectArray> capsArrayObj(env,
+        env->NewObjectArray(mimes.size(), gCodecInfo.capsClazz, NULL));
+
+    for (size_t i = 0; i < mimes.size(); i++) {
+        const sp<MediaCodecInfo::Capabilities> caps =
+                codecInfo->getCapabilitiesFor(mimes[i].c_str());
+
+        ScopedLocalRef<jobject> capsObj(env, getCodecCapabilitiesObject(
+                env, mimes[i].c_str(), isEncoder, caps));
+
+        env->SetObjectArrayElement(capsArrayObj.get(), i, capsObj.get());
+    }
+
+    ScopedLocalRef<jclass> codecInfoClazz(env,
+            env->FindClass("android/media/MediaCodecInfo"));
+    CHECK(codecInfoClazz.get() != NULL);
+
+    jmethodID codecInfoCtorID = env->GetMethodID(codecInfoClazz.get(), "<init>",
+            "(Ljava/lang/String;Z[Landroid/media/MediaCodecInfo$CodecCapabilities;)V");
+
+    *codecInfoObject = env->NewObject(codecInfoClazz.get(), codecInfoCtorID,
+            nameObject.get(), isEncoder, capsArrayObj.get());
+
+    return OK;
+}
+
 status_t JMediaCodec::getMetrics(JNIEnv *, MediaAnalyticsItem * &reply) const {
 
     status_t status = mCodec->getMetrics(reply);
@@ -1665,6 +1770,29 @@
     return NULL;
 }
 
+static jobject android_media_MediaCodec_getOwnCodecInfo(
+        JNIEnv *env, jobject thiz) {
+    ALOGV("android_media_MediaCodec_getOwnCodecInfo");
+
+    sp<JMediaCodec> codec = getMediaCodec(env, thiz);
+
+    if (codec == NULL) {
+        throwExceptionAsNecessary(env, INVALID_OPERATION);
+        return NULL;
+    }
+
+    jobject codecInfoObj;
+    status_t err = codec->getCodecInfo(env, &codecInfoObj);
+
+    if (err == OK) {
+        return codecInfoObj;
+    }
+
+    throwExceptionAsNecessary(env, err);
+
+    return NULL;
+}
+
 static jobject
 android_media_MediaCodec_native_getMetrics(JNIEnv *env, jobject thiz)
 {
@@ -1877,6 +2005,28 @@
     field = env->GetFieldID(clazz.get(), "mPersistentObject", "J");
     CHECK(field != NULL);
     gPersistentSurfaceClassInfo.mPersistentObject = field;
+
+    clazz.reset(env->FindClass("android/media/MediaCodecInfo$CodecCapabilities"));
+    CHECK(clazz.get() != NULL);
+    gCodecInfo.capsClazz = (jclass)env->NewGlobalRef(clazz.get());
+
+    method = env->GetMethodID(clazz.get(), "<init>",
+            "([Landroid/media/MediaCodecInfo$CodecProfileLevel;[IZI"
+            "Ljava/util/Map;Ljava/util/Map;)V");
+    CHECK(method != NULL);
+    gCodecInfo.capsCtorId = method;
+
+    clazz.reset(env->FindClass("android/media/MediaCodecInfo$CodecProfileLevel"));
+    CHECK(clazz.get() != NULL);
+    gCodecInfo.profileLevelClazz = (jclass)env->NewGlobalRef(clazz.get());
+
+    field = env->GetFieldID(clazz.get(), "profile", "I");
+    CHECK(field != NULL);
+    gCodecInfo.profileField = field;
+
+    field = env->GetFieldID(clazz.get(), "level", "I");
+    CHECK(field != NULL);
+    gCodecInfo.levelField = field;
 }
 
 static void android_media_MediaCodec_native_setup(
@@ -2002,6 +2152,9 @@
     { "getName", "()Ljava/lang/String;",
       (void *)android_media_MediaCodec_getName },
 
+    { "getOwnCodecInfo", "()Landroid/media/MediaCodecInfo;",
+        (void *)android_media_MediaCodec_getOwnCodecInfo },
+
     { "native_getMetrics", "()Landroid/os/PersistableBundle;",
       (void *)android_media_MediaCodec_native_getMetrics},
 
diff --git a/media/jni/android_media_MediaCodec.h b/media/jni/android_media_MediaCodec.h
index 2ec8703..985f55a 100644
--- a/media/jni/android_media_MediaCodec.h
+++ b/media/jni/android_media_MediaCodec.h
@@ -120,6 +120,8 @@
 
     status_t getName(JNIEnv *env, jstring *name) const;
 
+    status_t getCodecInfo(JNIEnv *env, jobject *codecInfo) const;
+
     status_t getMetrics(JNIEnv *env, MediaAnalyticsItem * &reply) const;
 
     status_t setParameters(const sp<AMessage> &params);