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New API to query available codecs and their capabilities.
Change-Id: I448ba443a96d8fee2bc9179750d57362ed31d9d9
1 parent 0424716 commit 5a04bf3

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‎media/java/android/media/MediaCodecList.java‎

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/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.media;
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/**
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* MediaCodecList class can be used to enumerate available codecs,
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* find a codec supporting a given format and query the capabilities
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* of a given codec.
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* @hide
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*/
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final public class MediaCodecList {
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public static native final int countCodecs();
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public static native final String getCodecName(int index);
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public static native final boolean isEncoder(int index);
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public static native final String[] getSupportedTypes(int index);
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public static final class CodecProfileLevel {
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public int mProfile;
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public int mLevel;
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};
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public static final class CodecCapabilities {
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public CodecProfileLevel[] mProfileLevels;
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public int[] mColorFormats;
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};
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public static native final CodecCapabilities getCodecCapabilities(
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int index, String type);
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private static native final void native_init();
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private MediaCodecList() {}
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static {
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System.loadLibrary("media_jni");
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native_init();
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}
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}

‎media/jni/Android.mk‎

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@@ -3,6 +3,7 @@ include $(CLEAR_VARS)
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LOCAL_SRC_FILES:= \
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android_media_MediaCodec.cpp \
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android_media_MediaCodecList.cpp \
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android_media_MediaExtractor.cpp \
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android_media_MediaPlayer.cpp \
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android_media_MediaRecorder.cpp \

‎media/jni/android_media_MediaCodecList.cpp‎

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/*
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* Copyright 2012, The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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//#define LOG_NDEBUG 0
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#define LOG_TAG "MediaCodec-JNI"
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#include <utils/Log.h>
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#include <media/stagefright/foundation/ADebug.h>
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#include <media/stagefright/MediaCodecList.h>
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#include "android_runtime/AndroidRuntime.h"
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#include "jni.h"
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#include "JNIHelp.h"
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using namespace android;
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static jint android_media_MediaCodecList_countCodecs(
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JNIEnv *env, jobject thiz) {
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return MediaCodecList::getInstance()->countCodecs();
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}
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static jstring android_media_MediaCodecList_getCodecName(
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JNIEnv *env, jobject thiz, jint index) {
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const char *name = MediaCodecList::getInstance()->getCodecName(index);
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if (name == NULL) {
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jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
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return NULL;
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}
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return env->NewStringUTF(name);
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}
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static jboolean android_media_MediaCodecList_isEncoder(
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JNIEnv *env, jobject thiz, jint index) {
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return MediaCodecList::getInstance()->isEncoder(index);
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}
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static jarray android_media_MediaCodecList_getSupportedTypes(
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JNIEnv *env, jobject thiz, jint index) {
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Vector<AString> types;
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status_t err =
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MediaCodecList::getInstance()->getSupportedTypes(index, &types);
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if (err != OK) {
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jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
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return NULL;
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}
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jclass clazz = env->FindClass("java/lang/String");
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CHECK(clazz != NULL);
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jobjectArray array = env->NewObjectArray(types.size(), clazz, NULL);
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for (size_t i = 0; i < types.size(); ++i) {
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jstring obj = env->NewStringUTF(types.itemAt(i).c_str());
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env->SetObjectArrayElement(array, i, obj);
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env->DeleteLocalRef(obj);
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obj = NULL;
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}
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return array;
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}
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static jobject android_media_MediaCodecList_getCodecCapabilities(
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JNIEnv *env, jobject thiz, jint index, jstring type) {
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if (type == NULL) {
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jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
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return NULL;
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}
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const char *typeStr = env->GetStringUTFChars(type, NULL);
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if (typeStr == NULL) {
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// Out of memory exception already pending.
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return NULL;
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}
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Vector<MediaCodecList::ProfileLevel> profileLevels;
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Vector<uint32_t> colorFormats;
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status_t err =
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MediaCodecList::getInstance()->getCodecCapabilities(
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index, typeStr, &profileLevels, &colorFormats);
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env->ReleaseStringUTFChars(type, typeStr);
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typeStr = NULL;
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if (err != OK) {
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jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
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return NULL;
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}
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jclass capsClazz =
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env->FindClass("android/media/MediaCodecList$CodecCapabilities");
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CHECK(capsClazz != NULL);
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jobject caps = env->AllocObject(capsClazz);
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jclass profileLevelClazz =
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env->FindClass("android/media/MediaCodecList$CodecProfileLevel");
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CHECK(profileLevelClazz != NULL);
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jobjectArray profileLevelArray =
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env->NewObjectArray(profileLevels.size(), profileLevelClazz, NULL);
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jfieldID profileField =
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env->GetFieldID(profileLevelClazz, "mProfile", "I");
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jfieldID levelField =
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env->GetFieldID(profileLevelClazz, "mLevel", "I");
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for (size_t i = 0; i < profileLevels.size(); ++i) {
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const MediaCodecList::ProfileLevel &src = profileLevels.itemAt(i);
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jobject profileLevelObj = env->AllocObject(profileLevelClazz);
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env->SetIntField(profileLevelObj, profileField, src.mProfile);
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env->SetIntField(profileLevelObj, levelField, src.mLevel);
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env->SetObjectArrayElement(profileLevelArray, i, profileLevelObj);
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env->DeleteLocalRef(profileLevelObj);
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profileLevelObj = NULL;
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}
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jfieldID profileLevelsField = env->GetFieldID(
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capsClazz,
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"mProfileLevels",
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"[Landroid/media/MediaCodecList$CodecProfileLevel;");
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env->SetObjectField(caps, profileLevelsField, profileLevelArray);
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env->DeleteLocalRef(profileLevelArray);
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profileLevelArray = NULL;
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jintArray colorFormatsArray = env->NewIntArray(colorFormats.size());
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for (size_t i = 0; i < colorFormats.size(); ++i) {
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jint val = colorFormats.itemAt(i);
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env->SetIntArrayRegion(colorFormatsArray, i, 1, &val);
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}
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jfieldID colorFormatsField = env->GetFieldID(
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capsClazz, "mColorFormats", "[I");
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env->SetObjectField(caps, colorFormatsField, colorFormatsArray);
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env->DeleteLocalRef(colorFormatsArray);
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colorFormatsArray = NULL;
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return caps;
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}
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static void android_media_MediaCodecList_native_init(JNIEnv *env) {
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}
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static JNINativeMethod gMethods[] = {
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{ "countCodecs", "()I", (void *)android_media_MediaCodecList_countCodecs },
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{ "getCodecName", "(I)Ljava/lang/String;",
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(void *)android_media_MediaCodecList_getCodecName },
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{ "isEncoder", "(I)Z", (void *)android_media_MediaCodecList_isEncoder },
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{ "getSupportedTypes", "(I)[Ljava/lang/String;",
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(void *)android_media_MediaCodecList_getSupportedTypes },
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{ "getCodecCapabilities",
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"(ILjava/lang/String;)Landroid/media/MediaCodecList$CodecCapabilities;",
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(void *)android_media_MediaCodecList_getCodecCapabilities },
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{ "native_init", "()V", (void *)android_media_MediaCodecList_native_init },
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};
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int register_android_media_MediaCodecList(JNIEnv *env) {
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return AndroidRuntime::registerNativeMethods(env,
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"android/media/MediaCodecList", gMethods, NELEM(gMethods));
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}
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‎media/jni/android_media_MediaPlayer.cpp‎

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@@ -881,6 +881,7 @@ static int register_android_media_MediaPlayer(JNIEnv *env)
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extern int register_android_media_MediaCodec(JNIEnv *env);
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extern int register_android_media_MediaExtractor(JNIEnv *env);
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extern int register_android_media_MediaCodecList(JNIEnv *env);
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extern int register_android_media_MediaMetadataRetriever(JNIEnv *env);
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extern int register_android_media_MediaRecorder(JNIEnv *env);
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extern int register_android_media_MediaScanner(JNIEnv *env);
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goto bail;
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}
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if (register_android_media_MediaCodecList(env) < 0) {
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ALOGE("ERROR: MediaCodec native registration failed");
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goto bail;
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}
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/* success -- return valid version number */
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result = JNI_VERSION_1_4;
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