android_media_ImageReader.cpp revision 5cf86aa7564eff8443158644e866a420d865b1bc 
1/*
2 * Copyright 2013 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 "ImageReader_JNI"
19#include <utils/Log.h>
20#include <utils/misc.h>
21#include <utils/List.h>
22#include <utils/String8.h>
23
24#include <cstdio>
25
26#include <gui/CpuConsumer.h>
27#include <gui/Surface.h>
28#include <camera3.h>
29
30#include <android_runtime/AndroidRuntime.h>
31#include <android_runtime/android_view_Surface.h>
32
33#include <jni.h>
34#include <JNIHelp.h>
35
36#define ALIGN(x, mask) ( ((x) + (mask) - 1) & ~((mask) - 1) )
37
38#define ANDROID_MEDIA_IMAGEREADER_CTX_JNI_ID       "mNativeContext"
39#define ANDROID_MEDIA_SURFACEIMAGE_BUFFER_JNI_ID   "mLockedBuffer"
40#define ANDROID_MEDIA_SURFACEIMAGE_TS_JNI_ID       "mTimestamp"
41
42// ----------------------------------------------------------------------------
43
44using namespace android;
45
46enum {
47    IMAGE_READER_MAX_NUM_PLANES = 3,
48};
49
50enum {
51    ACQUIRE_SUCCESS = 0,
52    ACQUIRE_NO_BUFFERS = 1,
53    ACQUIRE_MAX_IMAGES = 2,
54};
55
56static struct {
57    jfieldID mNativeContext;
58    jmethodID postEventFromNative;
59} gImageReaderClassInfo;
60
61static struct {
62    jfieldID mLockedBuffer;
63    jfieldID mTimestamp;
64} gSurfaceImageClassInfo;
65
66static struct {
67    jclass clazz;
68    jmethodID ctor;
69} gSurfacePlaneClassInfo;
70
71// ----------------------------------------------------------------------------
72
73class JNIImageReaderContext : public CpuConsumer::FrameAvailableListener
74{
75public:
76    JNIImageReaderContext(JNIEnv* env, jobject weakThiz, jclass clazz, int maxImages);
77
78    virtual ~JNIImageReaderContext();
79
80    virtual void onFrameAvailable();
81
82    CpuConsumer::LockedBuffer* getLockedBuffer();
83
84    void returnLockedBuffer(CpuConsumer::LockedBuffer* buffer);
85
86    void setCpuConsumer(const sp<CpuConsumer>& consumer) { mConsumer = consumer; }
87    CpuConsumer* getCpuConsumer() { return mConsumer.get(); }
88
89    void setBufferQueue(const sp<BufferQueue>& bq) { mBufferQueue = bq; }
90    BufferQueue* getBufferQueue() { return mBufferQueue.get(); }
91
92    void setBufferFormat(int format) { mFormat = format; }
93    int getBufferFormat() { return mFormat; }
94
95    void setBufferWidth(int width) { mWidth = width; }
96    int getBufferWidth() { return mWidth; }
97
98    void setBufferHeight(int height) { mHeight = height; }
99    int getBufferHeight() { return mHeight; }
100
101private:
102    static JNIEnv* getJNIEnv(bool* needsDetach);
103    static void detachJNI();
104
105    List<CpuConsumer::LockedBuffer*> mBuffers;
106    sp<CpuConsumer> mConsumer;
107    sp<BufferQueue> mBufferQueue;
108    jobject mWeakThiz;
109    jclass mClazz;
110    int mFormat;
111    int mWidth;
112    int mHeight;
113};
114
115JNIImageReaderContext::JNIImageReaderContext(JNIEnv* env,
116        jobject weakThiz, jclass clazz, int maxImages) :
117    mWeakThiz(env->NewGlobalRef(weakThiz)),
118    mClazz((jclass)env->NewGlobalRef(clazz)) {
119    for (int i = 0; i < maxImages; i++) {
120        CpuConsumer::LockedBuffer *buffer = new CpuConsumer::LockedBuffer;
121        mBuffers.push_back(buffer);
122    }
123}
124
125JNIEnv* JNIImageReaderContext::getJNIEnv(bool* needsDetach) {
126    LOG_ALWAYS_FATAL_IF(needsDetach == NULL, "needsDetach is null!!!");
127    *needsDetach = false;
128    JNIEnv* env = AndroidRuntime::getJNIEnv();
129    if (env == NULL) {
130        JavaVMAttachArgs args = {JNI_VERSION_1_4, NULL, NULL};
131        JavaVM* vm = AndroidRuntime::getJavaVM();
132        int result = vm->AttachCurrentThread(&env, (void*) &args);
133        if (result != JNI_OK) {
134            ALOGE("thread attach failed: %#x", result);
135            return NULL;
136        }
137        *needsDetach = true;
138    }
139    return env;
140}
141
142void JNIImageReaderContext::detachJNI() {
143    JavaVM* vm = AndroidRuntime::getJavaVM();
144    int result = vm->DetachCurrentThread();
145    if (result != JNI_OK) {
146        ALOGE("thread detach failed: %#x", result);
147    }
148}
149
150CpuConsumer::LockedBuffer* JNIImageReaderContext::getLockedBuffer() {
151    if (mBuffers.empty()) {
152        return NULL;
153    }
154    // Return a LockedBuffer pointer and remove it from the list
155    List<CpuConsumer::LockedBuffer*>::iterator it = mBuffers.begin();
156    CpuConsumer::LockedBuffer* buffer = *it;
157    mBuffers.erase(it);
158    return buffer;
159}
160
161void JNIImageReaderContext::returnLockedBuffer(CpuConsumer::LockedBuffer* buffer) {
162    mBuffers.push_back(buffer);
163}
164
165JNIImageReaderContext::~JNIImageReaderContext() {
166    bool needsDetach = false;
167    JNIEnv* env = getJNIEnv(&needsDetach);
168    if (env != NULL) {
169        env->DeleteGlobalRef(mWeakThiz);
170        env->DeleteGlobalRef(mClazz);
171    } else {
172        ALOGW("leaking JNI object references");
173    }
174    if (needsDetach) {
175        detachJNI();
176    }
177
178    // Delete LockedBuffers
179    for (List<CpuConsumer::LockedBuffer *>::iterator it = mBuffers.begin();
180            it != mBuffers.end(); it++) {
181        delete *it;
182    }
183    mBuffers.clear();
184    mConsumer.clear();
185}
186
187void JNIImageReaderContext::onFrameAvailable()
188{
189    ALOGV("%s: frame available", __FUNCTION__);
190    bool needsDetach = false;
191    JNIEnv* env = getJNIEnv(&needsDetach);
192    if (env != NULL) {
193        env->CallStaticVoidMethod(mClazz, gImageReaderClassInfo.postEventFromNative, mWeakThiz);
194    } else {
195        ALOGW("onFrameAvailable event will not posted");
196    }
197    if (needsDetach) {
198        detachJNI();
199    }
200}
201
202// ----------------------------------------------------------------------------
203
204extern "C" {
205
206static JNIImageReaderContext* ImageReader_getContext(JNIEnv* env, jobject thiz)
207{
208    JNIImageReaderContext *ctx;
209    ctx = reinterpret_cast<JNIImageReaderContext *>
210              (env->GetLongField(thiz, gImageReaderClassInfo.mNativeContext));
211    return ctx;
212}
213
214static CpuConsumer* ImageReader_getCpuConsumer(JNIEnv* env, jobject thiz)
215{
216    ALOGV("%s:", __FUNCTION__);
217    JNIImageReaderContext* const ctx = ImageReader_getContext(env, thiz);
218    if (ctx == NULL) {
219        jniThrowRuntimeException(env, "ImageReaderContext is not initialized");
220        return NULL;
221    }
222    return ctx->getCpuConsumer();
223}
224
225static BufferQueue* ImageReader_getBufferQueue(JNIEnv* env, jobject thiz)
226{
227    ALOGV("%s:", __FUNCTION__);
228    JNIImageReaderContext* const ctx = ImageReader_getContext(env, thiz);
229    if (ctx == NULL) {
230        jniThrowRuntimeException(env, "ImageReaderContext is not initialized");
231        return NULL;
232    }
233    return ctx->getBufferQueue();
234}
235
236static void ImageReader_setNativeContext(JNIEnv* env,
237        jobject thiz, sp<JNIImageReaderContext> ctx)
238{
239    ALOGV("%s:", __FUNCTION__);
240    JNIImageReaderContext* const p = ImageReader_getContext(env, thiz);
241    if (ctx != 0) {
242        ctx->incStrong((void*)ImageReader_setNativeContext);
243    }
244    if (p) {
245        p->decStrong((void*)ImageReader_setNativeContext);
246    }
247    env->SetLongField(thiz, gImageReaderClassInfo.mNativeContext,
248            reinterpret_cast<jlong>(ctx.get()));
249}
250
251static CpuConsumer::LockedBuffer* Image_getLockedBuffer(JNIEnv* env, jobject image)
252{
253    return reinterpret_cast<CpuConsumer::LockedBuffer*>(
254            env->GetLongField(image, gSurfaceImageClassInfo.mLockedBuffer));
255}
256
257static void Image_setBuffer(JNIEnv* env, jobject thiz,
258        const CpuConsumer::LockedBuffer* buffer)
259{
260    env->SetLongField(thiz, gSurfaceImageClassInfo.mLockedBuffer, reinterpret_cast<jlong>(buffer));
261}
262
263// Some formats like JPEG defined with different values between android.graphics.ImageFormat and
264// graphics.h, need convert to the one defined in graphics.h here.
265static int Image_getPixelFormat(JNIEnv* env, int format)
266{
267    int jpegFormat, rawSensorFormat;
268    jfieldID fid;
269
270    ALOGV("%s: format = 0x%x", __FUNCTION__, format);
271
272    jclass imageFormatClazz = env->FindClass("android/graphics/ImageFormat");
273    ALOG_ASSERT(imageFormatClazz != NULL);
274
275    fid = env->GetStaticFieldID(imageFormatClazz, "JPEG", "I");
276    jpegFormat = env->GetStaticIntField(imageFormatClazz, fid);
277    fid = env->GetStaticFieldID(imageFormatClazz, "RAW_SENSOR", "I");
278    rawSensorFormat = env->GetStaticIntField(imageFormatClazz, fid);
279
280    // Translate the JPEG to BLOB for camera purpose, an add more if more mismatch is found.
281    if (format == jpegFormat) {
282        format = HAL_PIXEL_FORMAT_BLOB;
283    }
284    // Same thing for RAW_SENSOR format
285    if (format == rawSensorFormat) {
286        format = HAL_PIXEL_FORMAT_RAW_SENSOR;
287    }
288
289    return format;
290}
291
292static uint32_t Image_getJpegSize(CpuConsumer::LockedBuffer* buffer)
293{
294    ALOG_ASSERT(buffer != NULL, "Input buffer is NULL!!!");
295    uint32_t size = 0;
296    uint32_t width = buffer->width;
297    uint8_t* jpegBuffer = buffer->data;
298
299    // First check for JPEG transport header at the end of the buffer
300    uint8_t* header = jpegBuffer + (width - sizeof(struct camera3_jpeg_blob));
301    struct camera3_jpeg_blob *blob = (struct camera3_jpeg_blob*)(header);
302    if (blob->jpeg_blob_id == CAMERA3_JPEG_BLOB_ID) {
303        size = blob->jpeg_size;
304        ALOGV("%s: Jpeg size = %d", __FUNCTION__, size);
305    }
306
307    // failed to find size, default to whole buffer
308    if (size == 0) {
309        size = width;
310    }
311
312    return size;
313}
314
315static void Image_getLockedBufferInfo(JNIEnv* env, CpuConsumer::LockedBuffer* buffer, int idx,
316                                uint8_t **base, uint32_t *size)
317{
318    ALOG_ASSERT(buffer != NULL, "Input buffer is NULL!!!");
319    ALOG_ASSERT(base != NULL, "base is NULL!!!");
320    ALOG_ASSERT(size != NULL, "size is NULL!!!");
321    ALOG_ASSERT((idx < IMAGE_READER_MAX_NUM_PLANES) && (idx >= 0));
322
323    ALOGV("%s: buffer: %p", __FUNCTION__, buffer);
324
325    uint32_t dataSize, ySize, cSize, cStride;
326    uint8_t *cb, *cr;
327    uint8_t *pData = NULL;
328    int bytesPerPixel = 0;
329
330    dataSize = ySize = cSize = cStride = 0;
331    int32_t fmt = buffer->format;
332    switch (fmt) {
333        case HAL_PIXEL_FORMAT_YCbCr_420_888:
334            pData =
335                (idx == 0) ?
336                    buffer->data :
337                (idx == 1) ?
338                    buffer->dataCb :
339                buffer->dataCr;
340            if (idx == 0) {
341                dataSize = buffer->stride * buffer->height;
342            } else {
343                dataSize = buffer->chromaStride * buffer->height / 2;
344            }
345            break;
346        // NV21
347        case HAL_PIXEL_FORMAT_YCrCb_420_SP:
348            cr = buffer->data + (buffer->stride * buffer->height);
349            cb = cr + 1;
350            ySize = buffer->width * buffer->height;
351            cSize = buffer->width * buffer->height / 2;
352
353            pData =
354                (idx == 0) ?
355                    buffer->data :
356                (idx == 1) ?
357                    cb:
358                cr;
359
360            dataSize = (idx == 0) ? ySize : cSize;
361            break;
362        case HAL_PIXEL_FORMAT_YV12:
363            // Y and C stride need to be 16 pixel aligned.
364            LOG_ALWAYS_FATAL_IF(buffer->stride % 16,
365                                "Stride is not 16 pixel aligned %d", buffer->stride);
366
367            ySize = buffer->stride * buffer->height;
368            cStride = ALIGN(buffer->stride / 2, 16);
369            cr = buffer->data + ySize;
370            cSize = cStride * buffer->height / 2;
371            cb = cr + cSize;
372
373            pData =
374                (idx == 0) ?
375                    buffer->data :
376                (idx == 1) ?
377                    cb :
378                cr;
379            dataSize = (idx == 0) ? ySize : cSize;
380            break;
381        case HAL_PIXEL_FORMAT_Y8:
382            // Single plane, 8bpp.
383            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
384
385            pData = buffer->data;
386            dataSize = buffer->stride * buffer->height;
387            break;
388        case HAL_PIXEL_FORMAT_Y16:
389            // Single plane, 16bpp, strides are specified in pixels, not in bytes
390            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
391
392            pData = buffer->data;
393            dataSize = buffer->stride * buffer->height * 2;
394            break;
395        case HAL_PIXEL_FORMAT_BLOB:
396            // Used for JPEG data, height must be 1, width == size, single plane.
397            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
398            ALOG_ASSERT(buffer->height == 1, "JPEG should has height value %d", buffer->height);
399
400            pData = buffer->data;
401            dataSize = Image_getJpegSize(buffer);
402            break;
403        case HAL_PIXEL_FORMAT_RAW_SENSOR:
404            // Single plane 16bpp bayer data.
405            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
406            pData = buffer->data;
407            dataSize = buffer->width * 2 * buffer->height;
408            break;
409        case HAL_PIXEL_FORMAT_RGBA_8888:
410        case HAL_PIXEL_FORMAT_RGBX_8888:
411            // Single plane, 32bpp.
412            bytesPerPixel = 4;
413            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
414            pData = buffer->data;
415            dataSize = buffer->stride * buffer->height * bytesPerPixel;
416            break;
417        case HAL_PIXEL_FORMAT_RGB_565:
418            // Single plane, 16bpp.
419            bytesPerPixel = 2;
420            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
421            pData = buffer->data;
422            dataSize = buffer->stride * buffer->height * bytesPerPixel;
423            break;
424        case HAL_PIXEL_FORMAT_RGB_888:
425            // Single plane, 24bpp.
426            bytesPerPixel = 3;
427            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
428            pData = buffer->data;
429            dataSize = buffer->stride * buffer->height * bytesPerPixel;
430            break;
431        default:
432            jniThrowExceptionFmt(env, "java/lang/UnsupportedOperationException",
433                                 "Pixel format: 0x%x is unsupported", fmt);
434            break;
435    }
436
437    *base = pData;
438    *size = dataSize;
439}
440
441static jint Image_imageGetPixelStride(JNIEnv* env, CpuConsumer::LockedBuffer* buffer, int idx)
442{
443    ALOGV("%s: buffer index: %d", __FUNCTION__, idx);
444    ALOG_ASSERT((idx < IMAGE_READER_MAX_NUM_PLANES) && (idx >= 0), "Index is out of range:%d", idx);
445
446    int pixelStride = 0;
447    ALOG_ASSERT(buffer != NULL, "buffer is NULL");
448
449    int32_t fmt = buffer->format;
450    switch (fmt) {
451        case HAL_PIXEL_FORMAT_YCbCr_420_888:
452            pixelStride = (idx == 0) ? 1 : buffer->chromaStep;
453            break;
454        case HAL_PIXEL_FORMAT_YCrCb_420_SP:
455            pixelStride = (idx == 0) ? 1 : 2;
456            break;
457        case HAL_PIXEL_FORMAT_Y8:
458            // Single plane 8bpp data.
459            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
460            pixelStride;
461            break;
462        case HAL_PIXEL_FORMAT_YV12:
463            pixelStride = 1;
464            break;
465        case HAL_PIXEL_FORMAT_BLOB:
466            // Used for JPEG data, single plane, row and pixel strides are 0
467            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
468            pixelStride = 0;
469            break;
470        case HAL_PIXEL_FORMAT_Y16:
471        case HAL_PIXEL_FORMAT_RAW_SENSOR:
472        case HAL_PIXEL_FORMAT_RGB_565:
473            // Single plane 16bpp data.
474            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
475            pixelStride = 2;
476            break;
477        case HAL_PIXEL_FORMAT_RGBA_8888:
478        case HAL_PIXEL_FORMAT_RGBX_8888:
479            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
480            pixelStride = 4;
481            break;
482        case HAL_PIXEL_FORMAT_RGB_888:
483            // Single plane, 24bpp.
484            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
485            pixelStride = 3;
486            break;
487        default:
488            jniThrowExceptionFmt(env, "java/lang/UnsupportedOperationException",
489                                 "Pixel format: 0x%x is unsupported", fmt);
490            break;
491    }
492
493    return pixelStride;
494}
495
496static jint Image_imageGetRowStride(JNIEnv* env, CpuConsumer::LockedBuffer* buffer, int idx)
497{
498    ALOGV("%s: buffer index: %d", __FUNCTION__, idx);
499    ALOG_ASSERT((idx < IMAGE_READER_MAX_NUM_PLANES) && (idx >= 0));
500
501    int rowStride = 0;
502    ALOG_ASSERT(buffer != NULL, "buffer is NULL");
503
504    int32_t fmt = buffer->format;
505
506    switch (fmt) {
507        case HAL_PIXEL_FORMAT_YCbCr_420_888:
508            rowStride = (idx == 0) ? buffer->stride : buffer->chromaStride;
509            break;
510        case HAL_PIXEL_FORMAT_YCrCb_420_SP:
511            rowStride = buffer->width;
512            break;
513        case HAL_PIXEL_FORMAT_YV12:
514            LOG_ALWAYS_FATAL_IF(buffer->stride % 16,
515                                "Stride is not 16 pixel aligned %d", buffer->stride);
516            rowStride = (idx == 0) ? buffer->stride : ALIGN(buffer->stride / 2, 16);
517            break;
518        case HAL_PIXEL_FORMAT_BLOB:
519            // Used for JPEG data, single plane, row and pixel strides are 0
520            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
521            rowStride = 0;
522            break;
523        case HAL_PIXEL_FORMAT_Y8:
524            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
525            LOG_ALWAYS_FATAL_IF(buffer->stride % 16,
526                                "Stride is not 16 pixel aligned %d", buffer->stride);
527            rowStride = buffer->stride;
528            break;
529        case HAL_PIXEL_FORMAT_Y16:
530        case HAL_PIXEL_FORMAT_RAW_SENSOR:
531            // In native side, strides are specified in pixels, not in bytes.
532            // Single plane 16bpp bayer data. even width/height,
533            // row stride multiple of 16 pixels (32 bytes)
534            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
535            LOG_ALWAYS_FATAL_IF(buffer->stride % 16,
536                                "Stride is not 16 pixel aligned %d", buffer->stride);
537            rowStride = buffer->stride * 2;
538            break;
539        case HAL_PIXEL_FORMAT_RGB_565:
540            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
541            rowStride = buffer->stride * 2;
542            break;
543        case HAL_PIXEL_FORMAT_RGBA_8888:
544        case HAL_PIXEL_FORMAT_RGBX_8888:
545            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
546            rowStride = buffer->stride * 4;
547            break;
548        case HAL_PIXEL_FORMAT_RGB_888:
549            // Single plane, 24bpp.
550            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
551            rowStride = buffer->stride * 3;
552            break;
553        default:
554            ALOGE("%s Pixel format: 0x%x is unsupported", __FUNCTION__, fmt);
555            jniThrowException(env, "java/lang/UnsupportedOperationException",
556                              "unsupported buffer format");
557          break;
558    }
559
560    return rowStride;
561}
562
563// ----------------------------------------------------------------------------
564
565static void ImageReader_classInit(JNIEnv* env, jclass clazz)
566{
567    ALOGV("%s:", __FUNCTION__);
568
569    jclass imageClazz = env->FindClass("android/media/ImageReader$SurfaceImage");
570    LOG_ALWAYS_FATAL_IF(imageClazz == NULL,
571                        "can't find android/graphics/ImageReader$SurfaceImage");
572    gSurfaceImageClassInfo.mLockedBuffer = env->GetFieldID(
573            imageClazz, ANDROID_MEDIA_SURFACEIMAGE_BUFFER_JNI_ID, "J");
574    LOG_ALWAYS_FATAL_IF(gSurfaceImageClassInfo.mLockedBuffer == NULL,
575                        "can't find android/graphics/ImageReader.%s",
576                        ANDROID_MEDIA_SURFACEIMAGE_BUFFER_JNI_ID);
577
578    gSurfaceImageClassInfo.mTimestamp = env->GetFieldID(
579            imageClazz, ANDROID_MEDIA_SURFACEIMAGE_TS_JNI_ID, "J");
580    LOG_ALWAYS_FATAL_IF(gSurfaceImageClassInfo.mTimestamp == NULL,
581                        "can't find android/graphics/ImageReader.%s",
582                        ANDROID_MEDIA_SURFACEIMAGE_TS_JNI_ID);
583
584    gImageReaderClassInfo.mNativeContext = env->GetFieldID(
585            clazz, ANDROID_MEDIA_IMAGEREADER_CTX_JNI_ID, "J");
586    LOG_ALWAYS_FATAL_IF(gImageReaderClassInfo.mNativeContext == NULL,
587                        "can't find android/graphics/ImageReader.%s",
588                          ANDROID_MEDIA_IMAGEREADER_CTX_JNI_ID);
589
590    gImageReaderClassInfo.postEventFromNative = env->GetStaticMethodID(
591            clazz, "postEventFromNative", "(Ljava/lang/Object;)V");
592    LOG_ALWAYS_FATAL_IF(gImageReaderClassInfo.postEventFromNative == NULL,
593                        "can't find android/graphics/ImageReader.postEventFromNative");
594
595    jclass planeClazz = env->FindClass("android/media/ImageReader$SurfaceImage$SurfacePlane");
596    LOG_ALWAYS_FATAL_IF(planeClazz == NULL, "Can not find SurfacePlane class");
597    // FindClass only gives a local reference of jclass object.
598    gSurfacePlaneClassInfo.clazz = (jclass) env->NewGlobalRef(planeClazz);
599    gSurfacePlaneClassInfo.ctor = env->GetMethodID(gSurfacePlaneClassInfo.clazz, "<init>",
600            "(Landroid/media/ImageReader$SurfaceImage;III)V");
601    LOG_ALWAYS_FATAL_IF(gSurfacePlaneClassInfo.ctor == NULL,
602            "Can not find SurfacePlane constructor");
603}
604
605static void ImageReader_init(JNIEnv* env, jobject thiz, jobject weakThiz,
606                             jint width, jint height, jint format, jint maxImages)
607{
608    status_t res;
609    int nativeFormat;
610
611    ALOGV("%s: width:%d, height: %d, format: 0x%x, maxImages:%d",
612          __FUNCTION__, width, height, format, maxImages);
613
614    nativeFormat = Image_getPixelFormat(env, format);
615
616    sp<BufferQueue> bq = new BufferQueue();
617    sp<CpuConsumer> consumer = new CpuConsumer(bq, maxImages,
618                                               /*controlledByApp*/true);
619    // TODO: throw dvm exOutOfMemoryError?
620    if (consumer == NULL) {
621        jniThrowRuntimeException(env, "Failed to allocate native CpuConsumer");
622        return;
623    }
624
625    jclass clazz = env->GetObjectClass(thiz);
626    if (clazz == NULL) {
627        jniThrowRuntimeException(env, "Can't find android/graphics/ImageReader");
628        return;
629    }
630    sp<JNIImageReaderContext> ctx(new JNIImageReaderContext(env, weakThiz, clazz, maxImages));
631    ctx->setCpuConsumer(consumer);
632    ctx->setBufferQueue(bq);
633    consumer->setFrameAvailableListener(ctx);
634    ImageReader_setNativeContext(env, thiz, ctx);
635    ctx->setBufferFormat(nativeFormat);
636    ctx->setBufferWidth(width);
637    ctx->setBufferHeight(height);
638
639    // Set the width/height/format to the CpuConsumer
640    res = consumer->setDefaultBufferSize(width, height);
641    if (res != OK) {
642        jniThrowException(env, "java/lang/IllegalStateException",
643                          "Failed to set CpuConsumer buffer size");
644        return;
645    }
646    res = consumer->setDefaultBufferFormat(nativeFormat);
647    if (res != OK) {
648        jniThrowException(env, "java/lang/IllegalStateException",
649                          "Failed to set CpuConsumer buffer format");
650    }
651}
652
653static void ImageReader_close(JNIEnv* env, jobject thiz)
654{
655    ALOGV("%s:", __FUNCTION__);
656
657    JNIImageReaderContext* const ctx = ImageReader_getContext(env, thiz);
658    if (ctx == NULL) {
659        // ImageReader is already closed.
660        return;
661    }
662
663    CpuConsumer* consumer = ImageReader_getCpuConsumer(env, thiz);
664    if (consumer != NULL) {
665        consumer->abandon();
666        consumer->setFrameAvailableListener(NULL);
667    }
668    ImageReader_setNativeContext(env, thiz, NULL);
669}
670
671static void ImageReader_imageRelease(JNIEnv* env, jobject thiz, jobject image)
672{
673    ALOGV("%s:", __FUNCTION__);
674    JNIImageReaderContext* ctx = ImageReader_getContext(env, thiz);
675    if (ctx == NULL) {
676        ALOGW("ImageReader#close called before Image#close, consider calling Image#close first");
677        return;
678    }
679
680    CpuConsumer* consumer = ctx->getCpuConsumer();
681    CpuConsumer::LockedBuffer* buffer = Image_getLockedBuffer(env, image);
682    if (!buffer) {
683        ALOGW("Image already released!!!");
684        return;
685    }
686    consumer->unlockBuffer(*buffer);
687    Image_setBuffer(env, image, NULL);
688    ctx->returnLockedBuffer(buffer);
689}
690
691static jint ImageReader_imageSetup(JNIEnv* env, jobject thiz,
692                                             jobject image)
693{
694    ALOGV("%s:", __FUNCTION__);
695    JNIImageReaderContext* ctx = ImageReader_getContext(env, thiz);
696    if (ctx == NULL) {
697        jniThrowRuntimeException(env, "ImageReaderContext is not initialized");
698        return -1;
699    }
700
701    CpuConsumer* consumer = ctx->getCpuConsumer();
702    CpuConsumer::LockedBuffer* buffer = ctx->getLockedBuffer();
703    if (buffer == NULL) {
704        ALOGW("Unable to acquire a lockedBuffer, very likely client tries to lock more than"
705            " maxImages buffers");
706        return ACQUIRE_MAX_IMAGES;
707    }
708    status_t res = consumer->lockNextBuffer(buffer);
709    if (res != NO_ERROR) {
710        if (res != BAD_VALUE /*no buffers*/) {
711            if (res == NOT_ENOUGH_DATA) {
712                return ACQUIRE_MAX_IMAGES;
713            } else {
714                ALOGE("%s Fail to lockNextBuffer with error: %d ",
715                      __FUNCTION__, res);
716                jniThrowExceptionFmt(env, "java/lang/AssertionError",
717                          "Unknown error (%d) when we tried to lock buffer.",
718                          res);
719            }
720        }
721        return ACQUIRE_NO_BUFFERS;
722    }
723
724    // Check if the left-top corner of the crop rect is origin, we currently assume this point is
725    // zero, will revist this once this assumption turns out problematic.
726    Point lt = buffer->crop.leftTop();
727    if (lt.x != 0 || lt.y != 0) {
728        ALOGE("crop left: %d, top = %d", lt.x, lt.y);
729        jniThrowException(env, "java/lang/UnsupportedOperationException",
730                          "crop left top corner need to at origin");
731        return -1;
732    }
733
734    // Check if the producer buffer configurations match what ImageReader configured.
735    // We want to fail for the very first image because this case is too bad.
736    int outputWidth = buffer->width;
737    int outputHeight = buffer->height;
738
739    // Correct width/height when crop is set.
740    if (buffer->crop.isValid()) {
741        outputWidth = buffer->crop.getWidth();
742        outputHeight = buffer->crop.getHeight();
743    }
744
745    int imageReaderWidth = ctx->getBufferWidth();
746    int imageReaderHeight = ctx->getBufferHeight();
747    if ((buffer->format != HAL_PIXEL_FORMAT_BLOB) &&
748            (imageReaderWidth != outputWidth || imageReaderHeight > outputHeight)) {
749        /**
750         * For video decoder, the buffer height is actually the vertical stride,
751         * which is always >= actual image height. For future, decoder need provide
752         * right crop rectangle to CpuConsumer to indicate the actual image height,
753         * see bug 9563986. After this bug is fixed, we can enforce the height equal
754         * check. Right now, only make sure buffer height is no less than ImageReader
755         * height.
756         */
757        jniThrowExceptionFmt(env, "java/lang/IllegalStateException",
758                "Producer buffer size: %dx%d, doesn't match ImageReader configured size: %dx%d",
759                outputWidth, outputHeight, imageReaderWidth, imageReaderHeight);
760        return -1;
761    }
762
763    if (ctx->getBufferFormat() != buffer->format) {
764        // Return the buffer to the queue.
765        consumer->unlockBuffer(*buffer);
766        ctx->returnLockedBuffer(buffer);
767
768        // Throw exception
769        ALOGE("Producer output buffer format: 0x%x, ImageReader configured format: 0x%x",
770              buffer->format, ctx->getBufferFormat());
771        String8 msg;
772        msg.appendFormat("The producer output buffer format 0x%x doesn't "
773                "match the ImageReader's configured buffer format 0x%x.",
774                buffer->format, ctx->getBufferFormat());
775        jniThrowException(env, "java/lang/UnsupportedOperationException",
776                msg.string());
777        return -1;
778    }
779    // Set SurfaceImage instance member variables
780    Image_setBuffer(env, image, buffer);
781    env->SetLongField(image, gSurfaceImageClassInfo.mTimestamp,
782            static_cast<jlong>(buffer->timestamp));
783
784    return ACQUIRE_SUCCESS;
785}
786
787static jobject ImageReader_getSurface(JNIEnv* env, jobject thiz)
788{
789    ALOGV("%s: ", __FUNCTION__);
790
791    BufferQueue* bq = ImageReader_getBufferQueue(env, thiz);
792    if (bq == NULL) {
793        jniThrowRuntimeException(env, "CpuConsumer is uninitialized");
794        return NULL;
795    }
796
797    // Wrap the IGBP in a Java-language Surface.
798    return android_view_Surface_createFromIGraphicBufferProducer(env, bq);
799}
800
801static jobject Image_createSurfacePlane(JNIEnv* env, jobject thiz, int idx)
802{
803    int rowStride, pixelStride;
804    ALOGV("%s: buffer index: %d", __FUNCTION__, idx);
805
806    CpuConsumer::LockedBuffer* buffer = Image_getLockedBuffer(env, thiz);
807
808    ALOG_ASSERT(buffer != NULL);
809    if (buffer == NULL) {
810        jniThrowException(env, "java/lang/IllegalStateException", "Image was released");
811    }
812    rowStride = Image_imageGetRowStride(env, buffer, idx);
813    pixelStride = Image_imageGetPixelStride(env, buffer, idx);
814
815    jobject surfPlaneObj = env->NewObject(gSurfacePlaneClassInfo.clazz,
816            gSurfacePlaneClassInfo.ctor, thiz, idx, rowStride, pixelStride);
817
818    return surfPlaneObj;
819}
820
821static jobject Image_getByteBuffer(JNIEnv* env, jobject thiz, int idx)
822{
823    uint8_t *base = NULL;
824    uint32_t size = 0;
825    jobject byteBuffer;
826
827    ALOGV("%s: buffer index: %d", __FUNCTION__, idx);
828
829    CpuConsumer::LockedBuffer* buffer = Image_getLockedBuffer(env, thiz);
830
831    if (buffer == NULL) {
832        jniThrowException(env, "java/lang/IllegalStateException", "Image was released");
833    }
834
835    // Create byteBuffer from native buffer
836    Image_getLockedBufferInfo(env, buffer, idx, &base, &size);
837    byteBuffer = env->NewDirectByteBuffer(base, size);
838    // TODO: throw dvm exOutOfMemoryError?
839    if ((byteBuffer == NULL) && (env->ExceptionCheck() == false)) {
840        jniThrowException(env, "java/lang/IllegalStateException", "Failed to allocate ByteBuffer");
841    }
842
843    return byteBuffer;
844}
845
846} // extern "C"
847
848// ----------------------------------------------------------------------------
849
850static JNINativeMethod gImageReaderMethods[] = {
851    {"nativeClassInit",        "()V",                        (void*)ImageReader_classInit },
852    {"nativeInit",             "(Ljava/lang/Object;IIII)V",  (void*)ImageReader_init },
853    {"nativeClose",            "()V",                        (void*)ImageReader_close },
854    {"nativeReleaseImage",     "(Landroid/media/Image;)V",   (void*)ImageReader_imageRelease },
855    {"nativeImageSetup",       "(Landroid/media/Image;)I",    (void*)ImageReader_imageSetup },
856    {"nativeGetSurface",       "()Landroid/view/Surface;",   (void*)ImageReader_getSurface },
857};
858
859static JNINativeMethod gImageMethods[] = {
860    {"nativeImageGetBuffer",   "(I)Ljava/nio/ByteBuffer;",   (void*)Image_getByteBuffer },
861    {"nativeCreatePlane",      "(I)Landroid/media/ImageReader$SurfaceImage$SurfacePlane;",
862                                                             (void*)Image_createSurfacePlane },
863};
864
865int register_android_media_ImageReader(JNIEnv *env) {
866
867    int ret1 = AndroidRuntime::registerNativeMethods(env,
868                   "android/media/ImageReader", gImageReaderMethods, NELEM(gImageReaderMethods));
869
870    int ret2 = AndroidRuntime::registerNativeMethods(env,
871                   "android/media/ImageReader$SurfaceImage", gImageMethods, NELEM(gImageMethods));
872
873    return (ret1 || ret2);
874}
875