android_media_ImageReader.cpp revision 977ad8d26e701ed3902247852986d474e0e07f4d 
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 setProducer(const sp<IGraphicBufferProducer>& producer) { mProducer = producer; }
90    IGraphicBufferProducer* getProducer() { return mProducer.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<IGraphicBufferProducer> mProducer;
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 IGraphicBufferProducer* ImageReader_getProducer(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->getProducer();
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            bytesPerPixel = 2;
390            // Single plane, 16bpp, strides are specified in pixels, not in bytes
391            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
392
393            pData = buffer->data;
394            dataSize = buffer->stride * buffer->height * bytesPerPixel;
395            break;
396        case HAL_PIXEL_FORMAT_BLOB:
397            // Used for JPEG data, height must be 1, width == size, single plane.
398            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
399            ALOG_ASSERT(buffer->height == 1, "JPEG should has height value %d", buffer->height);
400
401            pData = buffer->data;
402            dataSize = Image_getJpegSize(buffer);
403            break;
404        case HAL_PIXEL_FORMAT_RAW_SENSOR:
405            // Single plane 16bpp bayer data.
406            bytesPerPixel = 2;
407            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
408            pData = buffer->data;
409            dataSize = buffer->stride * buffer->height * bytesPerPixel;
410            break;
411        case HAL_PIXEL_FORMAT_RGBA_8888:
412        case HAL_PIXEL_FORMAT_RGBX_8888:
413            // Single plane, 32bpp.
414            bytesPerPixel = 4;
415            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
416            pData = buffer->data;
417            dataSize = buffer->stride * buffer->height * bytesPerPixel;
418            break;
419        case HAL_PIXEL_FORMAT_RGB_565:
420            // Single plane, 16bpp.
421            bytesPerPixel = 2;
422            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
423            pData = buffer->data;
424            dataSize = buffer->stride * buffer->height * bytesPerPixel;
425            break;
426        case HAL_PIXEL_FORMAT_RGB_888:
427            // Single plane, 24bpp.
428            bytesPerPixel = 3;
429            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
430            pData = buffer->data;
431            dataSize = buffer->stride * buffer->height * bytesPerPixel;
432            break;
433        default:
434            jniThrowExceptionFmt(env, "java/lang/UnsupportedOperationException",
435                                 "Pixel format: 0x%x is unsupported", fmt);
436            break;
437    }
438
439    *base = pData;
440    *size = dataSize;
441}
442
443static jint Image_imageGetPixelStride(JNIEnv* env, CpuConsumer::LockedBuffer* buffer, int idx)
444{
445    ALOGV("%s: buffer index: %d", __FUNCTION__, idx);
446    ALOG_ASSERT((idx < IMAGE_READER_MAX_NUM_PLANES) && (idx >= 0), "Index is out of range:%d", idx);
447
448    int pixelStride = 0;
449    ALOG_ASSERT(buffer != NULL, "buffer is NULL");
450
451    int32_t fmt = buffer->format;
452    switch (fmt) {
453        case HAL_PIXEL_FORMAT_YCbCr_420_888:
454            pixelStride = (idx == 0) ? 1 : buffer->chromaStep;
455            break;
456        case HAL_PIXEL_FORMAT_YCrCb_420_SP:
457            pixelStride = (idx == 0) ? 1 : 2;
458            break;
459        case HAL_PIXEL_FORMAT_Y8:
460            // Single plane 8bpp data.
461            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
462            pixelStride;
463            break;
464        case HAL_PIXEL_FORMAT_YV12:
465            pixelStride = 1;
466            break;
467        case HAL_PIXEL_FORMAT_BLOB:
468            // Used for JPEG data, single plane, row and pixel strides are 0
469            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
470            pixelStride = 0;
471            break;
472        case HAL_PIXEL_FORMAT_Y16:
473        case HAL_PIXEL_FORMAT_RAW_SENSOR:
474        case HAL_PIXEL_FORMAT_RGB_565:
475            // Single plane 16bpp data.
476            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
477            pixelStride = 2;
478            break;
479        case HAL_PIXEL_FORMAT_RGBA_8888:
480        case HAL_PIXEL_FORMAT_RGBX_8888:
481            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
482            pixelStride = 4;
483            break;
484        case HAL_PIXEL_FORMAT_RGB_888:
485            // Single plane, 24bpp.
486            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
487            pixelStride = 3;
488            break;
489        default:
490            jniThrowExceptionFmt(env, "java/lang/UnsupportedOperationException",
491                                 "Pixel format: 0x%x is unsupported", fmt);
492            break;
493    }
494
495    return pixelStride;
496}
497
498static jint Image_imageGetRowStride(JNIEnv* env, CpuConsumer::LockedBuffer* buffer, int idx)
499{
500    ALOGV("%s: buffer index: %d", __FUNCTION__, idx);
501    ALOG_ASSERT((idx < IMAGE_READER_MAX_NUM_PLANES) && (idx >= 0));
502
503    int rowStride = 0;
504    ALOG_ASSERT(buffer != NULL, "buffer is NULL");
505
506    int32_t fmt = buffer->format;
507
508    switch (fmt) {
509        case HAL_PIXEL_FORMAT_YCbCr_420_888:
510            rowStride = (idx == 0) ? buffer->stride : buffer->chromaStride;
511            break;
512        case HAL_PIXEL_FORMAT_YCrCb_420_SP:
513            rowStride = buffer->width;
514            break;
515        case HAL_PIXEL_FORMAT_YV12:
516            LOG_ALWAYS_FATAL_IF(buffer->stride % 16,
517                                "Stride is not 16 pixel aligned %d", buffer->stride);
518            rowStride = (idx == 0) ? buffer->stride : ALIGN(buffer->stride / 2, 16);
519            break;
520        case HAL_PIXEL_FORMAT_BLOB:
521            // Used for JPEG data, single plane, row and pixel strides are 0
522            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
523            rowStride = 0;
524            break;
525        case HAL_PIXEL_FORMAT_Y8:
526            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
527            LOG_ALWAYS_FATAL_IF(buffer->stride % 16,
528                                "Stride is not 16 pixel aligned %d", buffer->stride);
529            rowStride = buffer->stride;
530            break;
531        case HAL_PIXEL_FORMAT_Y16:
532        case HAL_PIXEL_FORMAT_RAW_SENSOR:
533            // In native side, strides are specified in pixels, not in bytes.
534            // Single plane 16bpp bayer data. even width/height,
535            // row stride multiple of 16 pixels (32 bytes)
536            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
537            LOG_ALWAYS_FATAL_IF(buffer->stride % 16,
538                                "Stride is not 16 pixel aligned %d", buffer->stride);
539            rowStride = buffer->stride * 2;
540            break;
541        case HAL_PIXEL_FORMAT_RGB_565:
542            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
543            rowStride = buffer->stride * 2;
544            break;
545        case HAL_PIXEL_FORMAT_RGBA_8888:
546        case HAL_PIXEL_FORMAT_RGBX_8888:
547            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
548            rowStride = buffer->stride * 4;
549            break;
550        case HAL_PIXEL_FORMAT_RGB_888:
551            // Single plane, 24bpp.
552            ALOG_ASSERT(idx == 0, "Wrong index: %d", idx);
553            rowStride = buffer->stride * 3;
554            break;
555        default:
556            ALOGE("%s Pixel format: 0x%x is unsupported", __FUNCTION__, fmt);
557            jniThrowException(env, "java/lang/UnsupportedOperationException",
558                              "unsupported buffer format");
559          break;
560    }
561
562    return rowStride;
563}
564
565// ----------------------------------------------------------------------------
566
567static void ImageReader_classInit(JNIEnv* env, jclass clazz)
568{
569    ALOGV("%s:", __FUNCTION__);
570
571    jclass imageClazz = env->FindClass("android/media/ImageReader$SurfaceImage");
572    LOG_ALWAYS_FATAL_IF(imageClazz == NULL,
573                        "can't find android/graphics/ImageReader$SurfaceImage");
574    gSurfaceImageClassInfo.mLockedBuffer = env->GetFieldID(
575            imageClazz, ANDROID_MEDIA_SURFACEIMAGE_BUFFER_JNI_ID, "J");
576    LOG_ALWAYS_FATAL_IF(gSurfaceImageClassInfo.mLockedBuffer == NULL,
577                        "can't find android/graphics/ImageReader.%s",
578                        ANDROID_MEDIA_SURFACEIMAGE_BUFFER_JNI_ID);
579
580    gSurfaceImageClassInfo.mTimestamp = env->GetFieldID(
581            imageClazz, ANDROID_MEDIA_SURFACEIMAGE_TS_JNI_ID, "J");
582    LOG_ALWAYS_FATAL_IF(gSurfaceImageClassInfo.mTimestamp == NULL,
583                        "can't find android/graphics/ImageReader.%s",
584                        ANDROID_MEDIA_SURFACEIMAGE_TS_JNI_ID);
585
586    gImageReaderClassInfo.mNativeContext = env->GetFieldID(
587            clazz, ANDROID_MEDIA_IMAGEREADER_CTX_JNI_ID, "J");
588    LOG_ALWAYS_FATAL_IF(gImageReaderClassInfo.mNativeContext == NULL,
589                        "can't find android/graphics/ImageReader.%s",
590                          ANDROID_MEDIA_IMAGEREADER_CTX_JNI_ID);
591
592    gImageReaderClassInfo.postEventFromNative = env->GetStaticMethodID(
593            clazz, "postEventFromNative", "(Ljava/lang/Object;)V");
594    LOG_ALWAYS_FATAL_IF(gImageReaderClassInfo.postEventFromNative == NULL,
595                        "can't find android/graphics/ImageReader.postEventFromNative");
596
597    jclass planeClazz = env->FindClass("android/media/ImageReader$SurfaceImage$SurfacePlane");
598    LOG_ALWAYS_FATAL_IF(planeClazz == NULL, "Can not find SurfacePlane class");
599    // FindClass only gives a local reference of jclass object.
600    gSurfacePlaneClassInfo.clazz = (jclass) env->NewGlobalRef(planeClazz);
601    gSurfacePlaneClassInfo.ctor = env->GetMethodID(gSurfacePlaneClassInfo.clazz, "<init>",
602            "(Landroid/media/ImageReader$SurfaceImage;III)V");
603    LOG_ALWAYS_FATAL_IF(gSurfacePlaneClassInfo.ctor == NULL,
604            "Can not find SurfacePlane constructor");
605}
606
607static void ImageReader_init(JNIEnv* env, jobject thiz, jobject weakThiz,
608                             jint width, jint height, jint format, jint maxImages)
609{
610    status_t res;
611    int nativeFormat;
612
613    ALOGV("%s: width:%d, height: %d, format: 0x%x, maxImages:%d",
614          __FUNCTION__, width, height, format, maxImages);
615
616    nativeFormat = Image_getPixelFormat(env, format);
617
618    sp<IGraphicBufferProducer> gbProducer;
619    sp<IGraphicBufferConsumer> gbConsumer;
620    BufferQueue::createBufferQueue(&gbProducer, &gbConsumer);
621    sp<CpuConsumer> consumer = new CpuConsumer(gbConsumer, maxImages,
622                                               /*controlledByApp*/true);
623    // TODO: throw dvm exOutOfMemoryError?
624    if (consumer == NULL) {
625        jniThrowRuntimeException(env, "Failed to allocate native CpuConsumer");
626        return;
627    }
628
629    jclass clazz = env->GetObjectClass(thiz);
630    if (clazz == NULL) {
631        jniThrowRuntimeException(env, "Can't find android/graphics/ImageReader");
632        return;
633    }
634    sp<JNIImageReaderContext> ctx(new JNIImageReaderContext(env, weakThiz, clazz, maxImages));
635    ctx->setCpuConsumer(consumer);
636    ctx->setProducer(gbProducer);
637    consumer->setFrameAvailableListener(ctx);
638    ImageReader_setNativeContext(env, thiz, ctx);
639    ctx->setBufferFormat(nativeFormat);
640    ctx->setBufferWidth(width);
641    ctx->setBufferHeight(height);
642
643    // Set the width/height/format to the CpuConsumer
644    res = consumer->setDefaultBufferSize(width, height);
645    if (res != OK) {
646        jniThrowException(env, "java/lang/IllegalStateException",
647                          "Failed to set CpuConsumer buffer size");
648        return;
649    }
650    res = consumer->setDefaultBufferFormat(nativeFormat);
651    if (res != OK) {
652        jniThrowException(env, "java/lang/IllegalStateException",
653                          "Failed to set CpuConsumer buffer format");
654    }
655}
656
657static void ImageReader_close(JNIEnv* env, jobject thiz)
658{
659    ALOGV("%s:", __FUNCTION__);
660
661    JNIImageReaderContext* const ctx = ImageReader_getContext(env, thiz);
662    if (ctx == NULL) {
663        // ImageReader is already closed.
664        return;
665    }
666
667    CpuConsumer* consumer = ImageReader_getCpuConsumer(env, thiz);
668    if (consumer != NULL) {
669        consumer->abandon();
670        consumer->setFrameAvailableListener(NULL);
671    }
672    ImageReader_setNativeContext(env, thiz, NULL);
673}
674
675static void ImageReader_imageRelease(JNIEnv* env, jobject thiz, jobject image)
676{
677    ALOGV("%s:", __FUNCTION__);
678    JNIImageReaderContext* ctx = ImageReader_getContext(env, thiz);
679    if (ctx == NULL) {
680        ALOGW("ImageReader#close called before Image#close, consider calling Image#close first");
681        return;
682    }
683
684    CpuConsumer* consumer = ctx->getCpuConsumer();
685    CpuConsumer::LockedBuffer* buffer = Image_getLockedBuffer(env, image);
686    if (!buffer) {
687        ALOGW("Image already released!!!");
688        return;
689    }
690    consumer->unlockBuffer(*buffer);
691    Image_setBuffer(env, image, NULL);
692    ctx->returnLockedBuffer(buffer);
693}
694
695static jint ImageReader_imageSetup(JNIEnv* env, jobject thiz,
696                                             jobject image)
697{
698    ALOGV("%s:", __FUNCTION__);
699    JNIImageReaderContext* ctx = ImageReader_getContext(env, thiz);
700    if (ctx == NULL) {
701        jniThrowRuntimeException(env, "ImageReaderContext is not initialized");
702        return -1;
703    }
704
705    CpuConsumer* consumer = ctx->getCpuConsumer();
706    CpuConsumer::LockedBuffer* buffer = ctx->getLockedBuffer();
707    if (buffer == NULL) {
708        ALOGW("Unable to acquire a lockedBuffer, very likely client tries to lock more than"
709            " maxImages buffers");
710        return ACQUIRE_MAX_IMAGES;
711    }
712    status_t res = consumer->lockNextBuffer(buffer);
713    if (res != NO_ERROR) {
714        ctx->returnLockedBuffer(buffer);
715        if (res != BAD_VALUE /*no buffers*/) {
716            if (res == NOT_ENOUGH_DATA) {
717                return ACQUIRE_MAX_IMAGES;
718            } else {
719                ALOGE("%s Fail to lockNextBuffer with error: %d ",
720                      __FUNCTION__, res);
721                jniThrowExceptionFmt(env, "java/lang/AssertionError",
722                          "Unknown error (%d) when we tried to lock buffer.",
723                          res);
724            }
725        }
726        return ACQUIRE_NO_BUFFERS;
727    }
728
729    if (buffer->format == HAL_PIXEL_FORMAT_YCrCb_420_SP) {
730        jniThrowException(env, "java/lang/UnsupportedOperationException",
731                "NV21 format is not supported by ImageReader");
732        return -1;
733    }
734
735    // Check if the left-top corner of the crop rect is origin, we currently assume this point is
736    // zero, will revist this once this assumption turns out problematic.
737    Point lt = buffer->crop.leftTop();
738    if (lt.x != 0 || lt.y != 0) {
739        jniThrowExceptionFmt(env, "java/lang/UnsupportedOperationException",
740                "crop left top corner [%d, %d] need to be at origin", lt.x, lt.y);
741        return -1;
742    }
743
744    // Check if the producer buffer configurations match what ImageReader configured.
745    // We want to fail for the very first image because this case is too bad.
746    int outputWidth = buffer->width;
747    int outputHeight = buffer->height;
748
749    // Correct width/height when crop is set.
750    if (!buffer->crop.isEmpty()) {
751        outputWidth = buffer->crop.getWidth();
752        outputHeight = buffer->crop.getHeight();
753    }
754
755    int imageReaderWidth = ctx->getBufferWidth();
756    int imageReaderHeight = ctx->getBufferHeight();
757    if ((buffer->format != HAL_PIXEL_FORMAT_BLOB) &&
758            (imageReaderWidth != outputWidth || imageReaderHeight > outputHeight)) {
759        /**
760         * For video decoder, the buffer height is actually the vertical stride,
761         * which is always >= actual image height. For future, decoder need provide
762         * right crop rectangle to CpuConsumer to indicate the actual image height,
763         * see bug 9563986. After this bug is fixed, we can enforce the height equal
764         * check. Right now, only make sure buffer height is no less than ImageReader
765         * height.
766         */
767        jniThrowExceptionFmt(env, "java/lang/IllegalStateException",
768                "Producer buffer size: %dx%d, doesn't match ImageReader configured size: %dx%d",
769                outputWidth, outputHeight, imageReaderWidth, imageReaderHeight);
770        return -1;
771    }
772
773    if (ctx->getBufferFormat() != buffer->format) {
774        // Return the buffer to the queue.
775        consumer->unlockBuffer(*buffer);
776        ctx->returnLockedBuffer(buffer);
777
778        // Throw exception
779        ALOGE("Producer output buffer format: 0x%x, ImageReader configured format: 0x%x",
780              buffer->format, ctx->getBufferFormat());
781        String8 msg;
782        msg.appendFormat("The producer output buffer format 0x%x doesn't "
783                "match the ImageReader's configured buffer format 0x%x.",
784                buffer->format, ctx->getBufferFormat());
785        jniThrowException(env, "java/lang/UnsupportedOperationException",
786                msg.string());
787        return -1;
788    }
789    // Set SurfaceImage instance member variables
790    Image_setBuffer(env, image, buffer);
791    env->SetLongField(image, gSurfaceImageClassInfo.mTimestamp,
792            static_cast<jlong>(buffer->timestamp));
793
794    return ACQUIRE_SUCCESS;
795}
796
797static jobject ImageReader_getSurface(JNIEnv* env, jobject thiz)
798{
799    ALOGV("%s: ", __FUNCTION__);
800
801    IGraphicBufferProducer* gbp = ImageReader_getProducer(env, thiz);
802    if (gbp == NULL) {
803        jniThrowRuntimeException(env, "CpuConsumer is uninitialized");
804        return NULL;
805    }
806
807    // Wrap the IGBP in a Java-language Surface.
808    return android_view_Surface_createFromIGraphicBufferProducer(env, gbp);
809}
810
811static jobject Image_createSurfacePlane(JNIEnv* env, jobject thiz, int idx)
812{
813    int rowStride, pixelStride;
814    ALOGV("%s: buffer index: %d", __FUNCTION__, idx);
815
816    CpuConsumer::LockedBuffer* buffer = Image_getLockedBuffer(env, thiz);
817
818    ALOG_ASSERT(buffer != NULL);
819    if (buffer == NULL) {
820        jniThrowException(env, "java/lang/IllegalStateException", "Image was released");
821    }
822    rowStride = Image_imageGetRowStride(env, buffer, idx);
823    pixelStride = Image_imageGetPixelStride(env, buffer, idx);
824
825    jobject surfPlaneObj = env->NewObject(gSurfacePlaneClassInfo.clazz,
826            gSurfacePlaneClassInfo.ctor, thiz, idx, rowStride, pixelStride);
827
828    return surfPlaneObj;
829}
830
831static jobject Image_getByteBuffer(JNIEnv* env, jobject thiz, int idx)
832{
833    uint8_t *base = NULL;
834    uint32_t size = 0;
835    jobject byteBuffer;
836
837    ALOGV("%s: buffer index: %d", __FUNCTION__, idx);
838
839    CpuConsumer::LockedBuffer* buffer = Image_getLockedBuffer(env, thiz);
840
841    if (buffer == NULL) {
842        jniThrowException(env, "java/lang/IllegalStateException", "Image was released");
843    }
844
845    // Create byteBuffer from native buffer
846    Image_getLockedBufferInfo(env, buffer, idx, &base, &size);
847    byteBuffer = env->NewDirectByteBuffer(base, size);
848    // TODO: throw dvm exOutOfMemoryError?
849    if ((byteBuffer == NULL) && (env->ExceptionCheck() == false)) {
850        jniThrowException(env, "java/lang/IllegalStateException", "Failed to allocate ByteBuffer");
851    }
852
853    return byteBuffer;
854}
855
856} // extern "C"
857
858// ----------------------------------------------------------------------------
859
860static JNINativeMethod gImageReaderMethods[] = {
861    {"nativeClassInit",        "()V",                        (void*)ImageReader_classInit },
862    {"nativeInit",             "(Ljava/lang/Object;IIII)V",  (void*)ImageReader_init },
863    {"nativeClose",            "()V",                        (void*)ImageReader_close },
864    {"nativeReleaseImage",     "(Landroid/media/Image;)V",   (void*)ImageReader_imageRelease },
865    {"nativeImageSetup",       "(Landroid/media/Image;)I",    (void*)ImageReader_imageSetup },
866    {"nativeGetSurface",       "()Landroid/view/Surface;",   (void*)ImageReader_getSurface },
867};
868
869static JNINativeMethod gImageMethods[] = {
870    {"nativeImageGetBuffer",   "(I)Ljava/nio/ByteBuffer;",   (void*)Image_getByteBuffer },
871    {"nativeCreatePlane",      "(I)Landroid/media/ImageReader$SurfaceImage$SurfacePlane;",
872                                                             (void*)Image_createSurfacePlane },
873};
874
875int register_android_media_ImageReader(JNIEnv *env) {
876
877    int ret1 = AndroidRuntime::registerNativeMethods(env,
878                   "android/media/ImageReader", gImageReaderMethods, NELEM(gImageReaderMethods));
879
880    int ret2 = AndroidRuntime::registerNativeMethods(env,
881                   "android/media/ImageReader$SurfaceImage", gImageMethods, NELEM(gImageMethods));
882
883    return (ret1 || ret2);
884}
885