android_media_MediaRecorder.cpp revision ba87e3e6c985e7175152993b5efcc7dd2f0e1c93 
1/*
2 * Copyright (C) 2008 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 "MediaRecorderJNI"
19#include <utils/Log.h>
20
21#include <ui/SurfaceComposerClient.h>
22#include <ui/ICameraService.h>
23#include <ui/Camera.h>
24#include <media/mediarecorder.h>
25#include <stdio.h>
26#include <assert.h>
27#include <limits.h>
28#include <unistd.h>
29#include <fcntl.h>
30#include <utils/threads.h>
31
32#include "jni.h"
33#include "JNIHelp.h"
34#include "android_runtime/AndroidRuntime.h"
35
36
37// ----------------------------------------------------------------------------
38
39using namespace android;
40
41// ----------------------------------------------------------------------------
42
43// helper function to extract a native Camera object from a Camera Java object
44extern sp<Camera> get_native_camera(JNIEnv *env, jobject thiz, struct camera_context_t** context);
45
46struct fields_t {
47    jfieldID    context;
48    jfieldID    surface;
49    /* actually in android.view.Surface XXX */
50    jfieldID    surface_native;
51
52    jmethodID   post_event;
53};
54static fields_t fields;
55
56static Mutex sLock;
57
58// ----------------------------------------------------------------------------
59// ref-counted object for callbacks
60class JNIMediaRecorderListener: public MediaRecorderListener
61{
62public:
63    JNIMediaRecorderListener(JNIEnv* env, jobject thiz, jobject weak_thiz);
64    ~JNIMediaRecorderListener();
65    void notify(int msg, int ext1, int ext2);
66private:
67    JNIMediaRecorderListener();
68    jclass      mClass;     // Reference to MediaRecorder class
69    jobject     mObject;    // Weak ref to MediaRecorder Java object to call on
70};
71
72JNIMediaRecorderListener::JNIMediaRecorderListener(JNIEnv* env, jobject thiz, jobject weak_thiz)
73{
74
75    // Hold onto the MediaRecorder class for use in calling the static method
76    // that posts events to the application thread.
77    jclass clazz = env->GetObjectClass(thiz);
78    if (clazz == NULL) {
79        LOGE("Can't find android/media/MediaRecorder");
80        jniThrowException(env, "java/lang/Exception", NULL);
81        return;
82    }
83    mClass = (jclass)env->NewGlobalRef(clazz);
84
85    // We use a weak reference so the MediaRecorder object can be garbage collected.
86    // The reference is only used as a proxy for callbacks.
87    mObject  = env->NewGlobalRef(weak_thiz);
88}
89
90JNIMediaRecorderListener::~JNIMediaRecorderListener()
91{
92    // remove global references
93    JNIEnv *env = AndroidRuntime::getJNIEnv();
94    env->DeleteGlobalRef(mObject);
95    env->DeleteGlobalRef(mClass);
96}
97
98void JNIMediaRecorderListener::notify(int msg, int ext1, int ext2)
99{
100    LOGV("JNIMediaRecorderListener::notify");
101
102    JNIEnv *env = AndroidRuntime::getJNIEnv();
103    env->CallStaticVoidMethod(mClass, fields.post_event, mObject, msg, ext1, ext2, 0);
104}
105
106// ----------------------------------------------------------------------------
107
108static sp<Surface> get_surface(JNIEnv* env, jobject clazz)
109{
110    LOGV("get_surface");
111    Surface* const p = (Surface*)env->GetIntField(clazz, fields.surface_native);
112    return sp<Surface>(p);
113}
114
115// Returns true if it throws an exception.
116static bool process_media_recorder_call(JNIEnv *env, status_t opStatus, const char* exception, const char* message)
117{
118    LOGV("process_media_recorder_call");
119    if (opStatus == (status_t)INVALID_OPERATION) {
120        jniThrowException(env, "java/lang/IllegalStateException", NULL);
121        return true;
122    } else if (opStatus != (status_t)OK) {
123        jniThrowException(env, exception, message);
124        return true;
125    }
126    return false;
127}
128
129static sp<MediaRecorder> getMediaRecorder(JNIEnv* env, jobject thiz)
130{
131    Mutex::Autolock l(sLock);
132    MediaRecorder* const p = (MediaRecorder*)env->GetIntField(thiz, fields.context);
133    return sp<MediaRecorder>(p);
134}
135
136static sp<MediaRecorder> setMediaRecorder(JNIEnv* env, jobject thiz, const sp<MediaRecorder>& recorder)
137{
138    Mutex::Autolock l(sLock);
139    sp<MediaRecorder> old = (MediaRecorder*)env->GetIntField(thiz, fields.context);
140    if (recorder.get()) {
141        recorder->incStrong(thiz);
142    }
143    if (old != 0) {
144        old->decStrong(thiz);
145    }
146    env->SetIntField(thiz, fields.context, (int)recorder.get());
147    return old;
148}
149
150
151static void android_media_MediaRecorder_setCamera(JNIEnv* env, jobject thiz, jobject camera)
152{
153    sp<Camera> c = get_native_camera(env, camera, NULL);
154    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
155    process_media_recorder_call(env, mr->setCamera(c->remote()),
156            "java/lang/RuntimeException", "setCamera failed.");
157}
158
159static void
160android_media_MediaRecorder_setVideoSource(JNIEnv *env, jobject thiz, jint vs)
161{
162    LOGV("setVideoSource(%d)", vs);
163    if (vs < VIDEO_SOURCE_DEFAULT || vs > VIDEO_SOURCE_CAMERA) {
164        jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid video source");
165        return;
166    }
167    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
168    process_media_recorder_call(env, mr->setVideoSource(vs), "java/lang/RuntimeException", "setVideoSource failed.");
169}
170
171static void
172android_media_MediaRecorder_setAudioSource(JNIEnv *env, jobject thiz, jint as)
173{
174    LOGV("setAudioSource(%d)", as);
175    if (as < AUDIO_SOURCE_DEFAULT || as > AUDIO_SOURCE_MIC) {
176        jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid audio source");
177        return;
178    }
179    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
180    process_media_recorder_call(env, mr->setAudioSource(as), "java/lang/RuntimeException", "setAudioSource failed.");
181}
182
183static void
184android_media_MediaRecorder_setOutputFormat(JNIEnv *env, jobject thiz, jint of)
185{
186    LOGV("setOutputFormat(%d)", of);
187    if (of < OUTPUT_FORMAT_DEFAULT || of >= OUTPUT_FORMAT_LIST_END) {
188        jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid output format");
189        return;
190    }
191    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
192    process_media_recorder_call(env, mr->setOutputFormat(of), "java/lang/RuntimeException", "setOutputFormat failed.");
193}
194
195static void
196android_media_MediaRecorder_setVideoEncoder(JNIEnv *env, jobject thiz, jint ve)
197{
198    LOGV("setVideoEncoder(%d)", ve);
199    if (ve < VIDEO_ENCODER_DEFAULT || ve > VIDEO_ENCODER_MPEG_4_SP) {
200        jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid video encoder");
201        return;
202    }
203    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
204    process_media_recorder_call(env, mr->setVideoEncoder(ve), "java/lang/RuntimeException", "setVideoEncoder failed.");
205}
206
207static void
208android_media_MediaRecorder_setAudioEncoder(JNIEnv *env, jobject thiz, jint ae)
209{
210    LOGV("setAudioEncoder(%d)", ae);
211    if (ae < AUDIO_ENCODER_DEFAULT || ae > AUDIO_ENCODER_AMR_NB) {
212        jniThrowException(env, "java/lang/IllegalArgumentException", "Invalid audio encoder");
213        return;
214    }
215    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
216    process_media_recorder_call(env, mr->setAudioEncoder(ae), "java/lang/RuntimeException", "setAudioEncoder failed.");
217}
218
219static void
220android_media_MediaRecorder_setOutputFileFD(JNIEnv *env, jobject thiz, jobject fileDescriptor, jlong offset, jlong length)
221{
222    LOGV("setOutputFile");
223    if (fileDescriptor == NULL) {
224        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
225        return;
226    }
227    int fd = getParcelFileDescriptorFD(env, fileDescriptor);
228    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
229    status_t opStatus = mr->setOutputFile(fd, offset, length);
230    process_media_recorder_call(env, opStatus, "java/io/IOException", "setOutputFile failed.");
231}
232
233static void
234android_media_MediaRecorder_setVideoSize(JNIEnv *env, jobject thiz, jint width, jint height)
235{
236    LOGV("setVideoSize(%d, %d)", width, height);
237    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
238
239    if (width <= 0 || height <= 0) {
240        jniThrowException(env, "java/lang/IllegalArgumentException", "invalid video size");
241        return;
242    }
243    process_media_recorder_call(env, mr->setVideoSize(width, height), "java/lang/RuntimeException", "setVideoSize failed.");
244}
245
246static void
247android_media_MediaRecorder_setVideoFrameRate(JNIEnv *env, jobject thiz, jint rate)
248{
249    LOGV("setVideoFrameRate(%d)", rate);
250    if (rate <= 0 || rate > MEDIA_RECORDER_MAX_FRAME_RATE) {
251        jniThrowException(env, "java/lang/IllegalArgumentException", "invalid frame rate");
252        return;
253    }
254    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
255    process_media_recorder_call(env, mr->setVideoFrameRate(rate), "java/lang/RuntimeException", "setVideoFrameRate failed.");
256}
257
258static void
259android_media_MediaRecorder_setMaxDuration(JNIEnv *env, jobject thiz, jint max_duration_ms)
260{
261    LOGV("setMaxDuration(%d)", max_duration_ms);
262    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
263
264    char params[64];
265    sprintf(params, "max-duration=%d", max_duration_ms);
266
267    process_media_recorder_call(env, mr->setParameters(String8(params)), "java/lang/RuntimeException", "setMaxDuration failed.");
268}
269
270static void
271android_media_MediaRecorder_prepare(JNIEnv *env, jobject thiz)
272{
273    LOGV("prepare");
274    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
275
276    jobject surface = env->GetObjectField(thiz, fields.surface);
277    if (surface != NULL) {
278        const sp<Surface>& native_surface = get_surface(env, surface);
279        LOGI("prepare: surface=%p (id=%d)", native_surface.get(), native_surface->ID());
280        if (process_media_recorder_call(env, mr->setPreviewSurface(native_surface), "java/lang/RuntimeException", "setPreviewSurface failed.")) {
281            return;
282        }
283    }
284    process_media_recorder_call(env, mr->prepare(), "java/io/IOException", "prepare failed.");
285}
286
287static int
288android_media_MediaRecorder_native_getMaxAmplitude(JNIEnv *env, jobject thiz)
289{
290    LOGV("getMaxAmplitude");
291    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
292    int result = 0;
293    process_media_recorder_call(env, mr->getMaxAmplitude(&result), "java/lang/RuntimeException", "getMaxAmplitude failed.");
294    return result;
295}
296
297static void
298android_media_MediaRecorder_start(JNIEnv *env, jobject thiz)
299{
300    LOGV("start");
301    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
302    process_media_recorder_call(env, mr->start(), "java/lang/RuntimeException", "start failed.");
303}
304
305static void
306android_media_MediaRecorder_stop(JNIEnv *env, jobject thiz)
307{
308    LOGV("stop");
309    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
310    process_media_recorder_call(env, mr->stop(), "java/lang/RuntimeException", "stop failed.");
311}
312
313static void
314android_media_MediaRecorder_native_reset(JNIEnv *env, jobject thiz)
315{
316    LOGV("native_reset");
317    sp<MediaRecorder> mr = getMediaRecorder(env, thiz);
318    process_media_recorder_call(env, mr->reset(), "java/lang/RuntimeException", "native_reset failed.");
319}
320
321static void
322android_media_MediaRecorder_release(JNIEnv *env, jobject thiz)
323{
324    LOGV("release");
325    sp<MediaRecorder> mr = setMediaRecorder(env, thiz, 0);
326    if (mr != NULL) {
327        mr->setListener(NULL);
328        mr->release();
329    }
330}
331
332static void
333android_media_MediaRecorder_native_setup(JNIEnv *env, jobject thiz, jobject weak_this)
334{
335    LOGV("setup");
336    sp<MediaRecorder> mr = new MediaRecorder();
337    if (mr == NULL) {
338        jniThrowException(env, "java/lang/RuntimeException", "Out of memory");
339        return;
340    }
341    if (mr->initCheck() != NO_ERROR) {
342        jniThrowException(env, "java/lang/IOException", "Unable to initialize camera");
343        return;
344    }
345
346    // create new listener and give it to MediaRecorder
347    sp<JNIMediaRecorderListener> listener = new JNIMediaRecorderListener(env, thiz, weak_this);
348    mr->setListener(listener);
349
350    setMediaRecorder(env, thiz, mr);
351}
352
353static void
354android_media_MediaRecorder_native_finalize(JNIEnv *env, jobject thiz)
355{
356    LOGV("finalize");
357    android_media_MediaRecorder_release(env, thiz);
358}
359
360// ----------------------------------------------------------------------------
361
362static JNINativeMethod gMethods[] = {
363    {"setCamera",            "(Landroid/hardware/Camera;)V",    (void *)android_media_MediaRecorder_setCamera},
364    {"setVideoSource",       "(I)V",                            (void *)android_media_MediaRecorder_setVideoSource},
365    {"setAudioSource",       "(I)V",                            (void *)android_media_MediaRecorder_setAudioSource},
366    {"setOutputFormat",      "(I)V",                            (void *)android_media_MediaRecorder_setOutputFormat},
367    {"setVideoEncoder",      "(I)V",                            (void *)android_media_MediaRecorder_setVideoEncoder},
368    {"setAudioEncoder",      "(I)V",                            (void *)android_media_MediaRecorder_setAudioEncoder},
369    {"_setOutputFile",       "(Ljava/io/FileDescriptor;JJ)V",   (void *)android_media_MediaRecorder_setOutputFileFD},
370    {"setVideoSize",         "(II)V",                           (void *)android_media_MediaRecorder_setVideoSize},
371    {"setVideoFrameRate",    "(I)V",                            (void *)android_media_MediaRecorder_setVideoFrameRate},
372    {"setMaxDuration",       "(I)V",                            (void *)android_media_MediaRecorder_setMaxDuration},
373    {"_prepare",             "()V",                             (void *)android_media_MediaRecorder_prepare},
374    {"getMaxAmplitude",      "()I",                             (void *)android_media_MediaRecorder_native_getMaxAmplitude},
375    {"start",                "()V",                             (void *)android_media_MediaRecorder_start},
376    {"stop",                 "()V",                             (void *)android_media_MediaRecorder_stop},
377    {"native_reset",                "()V",                             (void *)android_media_MediaRecorder_native_reset},
378    {"release",              "()V",                             (void *)android_media_MediaRecorder_release},
379    {"native_setup",         "(Ljava/lang/Object;)V",           (void *)android_media_MediaRecorder_native_setup},
380    {"native_finalize",      "()V",                             (void *)android_media_MediaRecorder_native_finalize},
381};
382
383static const char* const kClassPathName = "android/media/MediaRecorder";
384
385int register_android_media_MediaRecorder(JNIEnv *env)
386{
387    jclass clazz;
388
389    clazz = env->FindClass("android/media/MediaRecorder");
390    if (clazz == NULL) {
391        LOGE("Can't find android/media/MediaRecorder");
392        return -1;
393    }
394
395    fields.context = env->GetFieldID(clazz, "mNativeContext", "I");
396    if (fields.context == NULL) {
397        LOGE("Can't find MediaRecorder.mNativeContext");
398        return -1;
399    }
400
401    fields.surface = env->GetFieldID(clazz, "mSurface", "Landroid/view/Surface;");
402    if (fields.surface == NULL) {
403        LOGE("Can't find MediaRecorder.mSurface");
404        return -1;
405    }
406
407    jclass surface = env->FindClass("android/view/Surface");
408    if (surface == NULL) {
409        LOGE("Can't find android/view/Surface");
410        return -1;
411    }
412
413    fields.surface_native = env->GetFieldID(surface, "mSurface", "I");
414    if (fields.surface_native == NULL) {
415        LOGE("Can't find Surface fields");
416        return -1;
417    }
418
419    fields.post_event = env->GetStaticMethodID(clazz, "postEventFromNative",
420                                               "(Ljava/lang/Object;IIILjava/lang/Object;)V");
421    if (fields.post_event == NULL) {
422        LOGE("Can't find MediaRecorder.postEventFromNative");
423        return -1;
424    }
425
426    return AndroidRuntime::registerNativeMethods(env,
427                "android/media/MediaRecorder", gMethods, NELEM(gMethods));
428}
429
430
431