android_media_MediaCodecList.cpp revision 5a04bf395514a9342dd26af519b88f4b3e309eb9 
1/*
2 * Copyright 2012, The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *     http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17//#define LOG_NDEBUG 0
18#define LOG_TAG "MediaCodec-JNI"
19#include <utils/Log.h>
20
21#include <media/stagefright/foundation/ADebug.h>
22#include <media/stagefright/MediaCodecList.h>
23
24#include "android_runtime/AndroidRuntime.h"
25#include "jni.h"
26#include "JNIHelp.h"
27
28using namespace android;
29
30static jint android_media_MediaCodecList_countCodecs(
31        JNIEnv *env, jobject thiz) {
32    return MediaCodecList::getInstance()->countCodecs();
33}
34
35static jstring android_media_MediaCodecList_getCodecName(
36        JNIEnv *env, jobject thiz, jint index) {
37    const char *name = MediaCodecList::getInstance()->getCodecName(index);
38
39    if (name == NULL) {
40        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
41        return NULL;
42    }
43
44    return env->NewStringUTF(name);
45}
46
47static jboolean android_media_MediaCodecList_isEncoder(
48        JNIEnv *env, jobject thiz, jint index) {
49    return MediaCodecList::getInstance()->isEncoder(index);
50}
51
52static jarray android_media_MediaCodecList_getSupportedTypes(
53        JNIEnv *env, jobject thiz, jint index) {
54    Vector<AString> types;
55    status_t err =
56        MediaCodecList::getInstance()->getSupportedTypes(index, &types);
57
58    if (err != OK) {
59        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
60        return NULL;
61    }
62
63    jclass clazz = env->FindClass("java/lang/String");
64    CHECK(clazz != NULL);
65
66    jobjectArray array = env->NewObjectArray(types.size(), clazz, NULL);
67
68    for (size_t i = 0; i < types.size(); ++i) {
69        jstring obj = env->NewStringUTF(types.itemAt(i).c_str());
70        env->SetObjectArrayElement(array, i, obj);
71        env->DeleteLocalRef(obj);
72        obj = NULL;
73    }
74
75    return array;
76}
77
78static jobject android_media_MediaCodecList_getCodecCapabilities(
79        JNIEnv *env, jobject thiz, jint index, jstring type) {
80    if (type == NULL) {
81        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
82        return NULL;
83    }
84
85    const char *typeStr = env->GetStringUTFChars(type, NULL);
86
87    if (typeStr == NULL) {
88        // Out of memory exception already pending.
89        return NULL;
90    }
91
92    Vector<MediaCodecList::ProfileLevel> profileLevels;
93    Vector<uint32_t> colorFormats;
94
95    status_t err =
96        MediaCodecList::getInstance()->getCodecCapabilities(
97                index, typeStr, &profileLevels, &colorFormats);
98
99    env->ReleaseStringUTFChars(type, typeStr);
100    typeStr = NULL;
101
102    if (err != OK) {
103        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
104        return NULL;
105    }
106
107    jclass capsClazz =
108        env->FindClass("android/media/MediaCodecList$CodecCapabilities");
109    CHECK(capsClazz != NULL);
110
111    jobject caps = env->AllocObject(capsClazz);
112
113    jclass profileLevelClazz =
114        env->FindClass("android/media/MediaCodecList$CodecProfileLevel");
115    CHECK(profileLevelClazz != NULL);
116
117    jobjectArray profileLevelArray =
118        env->NewObjectArray(profileLevels.size(), profileLevelClazz, NULL);
119
120    jfieldID profileField =
121        env->GetFieldID(profileLevelClazz, "mProfile", "I");
122
123    jfieldID levelField =
124        env->GetFieldID(profileLevelClazz, "mLevel", "I");
125
126    for (size_t i = 0; i < profileLevels.size(); ++i) {
127        const MediaCodecList::ProfileLevel &src = profileLevels.itemAt(i);
128
129        jobject profileLevelObj = env->AllocObject(profileLevelClazz);
130
131        env->SetIntField(profileLevelObj, profileField, src.mProfile);
132        env->SetIntField(profileLevelObj, levelField, src.mLevel);
133
134        env->SetObjectArrayElement(profileLevelArray, i, profileLevelObj);
135
136        env->DeleteLocalRef(profileLevelObj);
137        profileLevelObj = NULL;
138    }
139
140    jfieldID profileLevelsField = env->GetFieldID(
141            capsClazz,
142            "mProfileLevels",
143            "[Landroid/media/MediaCodecList$CodecProfileLevel;");
144
145    env->SetObjectField(caps, profileLevelsField, profileLevelArray);
146
147    env->DeleteLocalRef(profileLevelArray);
148    profileLevelArray = NULL;
149
150    jintArray colorFormatsArray = env->NewIntArray(colorFormats.size());
151
152    for (size_t i = 0; i < colorFormats.size(); ++i) {
153        jint val = colorFormats.itemAt(i);
154        env->SetIntArrayRegion(colorFormatsArray, i, 1, &val);
155    }
156
157    jfieldID colorFormatsField = env->GetFieldID(
158            capsClazz, "mColorFormats", "[I");
159
160    env->SetObjectField(caps, colorFormatsField, colorFormatsArray);
161
162    env->DeleteLocalRef(colorFormatsArray);
163    colorFormatsArray = NULL;
164
165    return caps;
166}
167
168static void android_media_MediaCodecList_native_init(JNIEnv *env) {
169}
170
171static JNINativeMethod gMethods[] = {
172    { "countCodecs", "()I", (void *)android_media_MediaCodecList_countCodecs },
173    { "getCodecName", "(I)Ljava/lang/String;",
174      (void *)android_media_MediaCodecList_getCodecName },
175    { "isEncoder", "(I)Z", (void *)android_media_MediaCodecList_isEncoder },
176    { "getSupportedTypes", "(I)[Ljava/lang/String;",
177      (void *)android_media_MediaCodecList_getSupportedTypes },
178
179    { "getCodecCapabilities",
180      "(ILjava/lang/String;)Landroid/media/MediaCodecList$CodecCapabilities;",
181      (void *)android_media_MediaCodecList_getCodecCapabilities },
182
183    { "native_init", "()V", (void *)android_media_MediaCodecList_native_init },
184};
185
186int register_android_media_MediaCodecList(JNIEnv *env) {
187    return AndroidRuntime::registerNativeMethods(env,
188                "android/media/MediaCodecList", gMethods, NELEM(gMethods));
189}
190
191