1/*
2 * Copyright (C) 2010 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_TAG "SurfaceTextureClient"
18#define ATRACE_TAG ATRACE_TAG_GRAPHICS
19//#define LOG_NDEBUG 0
20
21#include <android/native_window.h>
22
23#include <utils/Log.h>
24#include <utils/Trace.h>
25
26#include <ui/Fence.h>
27
28#include <gui/ISurfaceComposer.h>
29#include <gui/SurfaceComposerClient.h>
30#include <gui/SurfaceTexture.h>
31#include <gui/SurfaceTextureClient.h>
32
33#include <private/gui/ComposerService.h>
34
35namespace android {
36
37SurfaceTextureClient::SurfaceTextureClient(
38        const sp<ISurfaceTexture>& surfaceTexture)
39{
40    SurfaceTextureClient::init();
41    SurfaceTextureClient::setISurfaceTexture(surfaceTexture);
42}
43
44// see SurfaceTextureClient.h
45SurfaceTextureClient::SurfaceTextureClient(const
46         sp<SurfaceTexture>& surfaceTexture)
47{
48    SurfaceTextureClient::init();
49    SurfaceTextureClient::setISurfaceTexture(surfaceTexture->getBufferQueue());
50}
51
52SurfaceTextureClient::SurfaceTextureClient() {
53    SurfaceTextureClient::init();
54}
55
56SurfaceTextureClient::~SurfaceTextureClient() {
57    if (mConnectedToCpu) {
58        SurfaceTextureClient::disconnect(NATIVE_WINDOW_API_CPU);
59    }
60}
61
62void SurfaceTextureClient::init() {
63    // Initialize the ANativeWindow function pointers.
64    ANativeWindow::setSwapInterval  = hook_setSwapInterval;
65    ANativeWindow::dequeueBuffer    = hook_dequeueBuffer;
66    ANativeWindow::cancelBuffer     = hook_cancelBuffer;
67    ANativeWindow::queueBuffer      = hook_queueBuffer;
68    ANativeWindow::query            = hook_query;
69    ANativeWindow::perform          = hook_perform;
70
71    ANativeWindow::dequeueBuffer_DEPRECATED = hook_dequeueBuffer_DEPRECATED;
72    ANativeWindow::cancelBuffer_DEPRECATED  = hook_cancelBuffer_DEPRECATED;
73    ANativeWindow::lockBuffer_DEPRECATED    = hook_lockBuffer_DEPRECATED;
74    ANativeWindow::queueBuffer_DEPRECATED   = hook_queueBuffer_DEPRECATED;
75
76    const_cast<int&>(ANativeWindow::minSwapInterval) = 0;
77    const_cast<int&>(ANativeWindow::maxSwapInterval) = 1;
78
79    mReqWidth = 0;
80    mReqHeight = 0;
81    mReqFormat = 0;
82    mReqUsage = 0;
83    mTimestamp = NATIVE_WINDOW_TIMESTAMP_AUTO;
84    mCrop.clear();
85    mScalingMode = NATIVE_WINDOW_SCALING_MODE_FREEZE;
86    mTransform = 0;
87    mDefaultWidth = 0;
88    mDefaultHeight = 0;
89    mUserWidth = 0;
90    mUserHeight = 0;
91    mTransformHint = 0;
92    mConsumerRunningBehind = false;
93    mConnectedToCpu = false;
94}
95
96void SurfaceTextureClient::setISurfaceTexture(
97        const sp<ISurfaceTexture>& surfaceTexture)
98{
99    mSurfaceTexture = surfaceTexture;
100}
101
102sp<ISurfaceTexture> SurfaceTextureClient::getISurfaceTexture() const {
103    return mSurfaceTexture;
104}
105
106int SurfaceTextureClient::hook_setSwapInterval(ANativeWindow* window, int interval) {
107    SurfaceTextureClient* c = getSelf(window);
108    return c->setSwapInterval(interval);
109}
110
111int SurfaceTextureClient::hook_dequeueBuffer(ANativeWindow* window,
112        ANativeWindowBuffer** buffer, int* fenceFd) {
113    SurfaceTextureClient* c = getSelf(window);
114    return c->dequeueBuffer(buffer, fenceFd);
115}
116
117int SurfaceTextureClient::hook_cancelBuffer(ANativeWindow* window,
118        ANativeWindowBuffer* buffer, int fenceFd) {
119    SurfaceTextureClient* c = getSelf(window);
120    return c->cancelBuffer(buffer, fenceFd);
121}
122
123int SurfaceTextureClient::hook_queueBuffer(ANativeWindow* window,
124        ANativeWindowBuffer* buffer, int fenceFd) {
125    SurfaceTextureClient* c = getSelf(window);
126    return c->queueBuffer(buffer, fenceFd);
127}
128
129int SurfaceTextureClient::hook_dequeueBuffer_DEPRECATED(ANativeWindow* window,
130        ANativeWindowBuffer** buffer) {
131    SurfaceTextureClient* c = getSelf(window);
132    ANativeWindowBuffer* buf;
133    int fenceFd = -1;
134    int result = c->dequeueBuffer(&buf, &fenceFd);
135    sp<Fence> fence(new Fence(fenceFd));
136    int waitResult = fence->waitForever(1000, "dequeueBuffer_DEPRECATED");
137    if (waitResult != OK) {
138        ALOGE("dequeueBuffer_DEPRECATED: Fence::wait returned an error: %d",
139                waitResult);
140        c->cancelBuffer(buf, -1);
141        return waitResult;
142    }
143    *buffer = buf;
144    return result;
145}
146
147int SurfaceTextureClient::hook_cancelBuffer_DEPRECATED(ANativeWindow* window,
148        ANativeWindowBuffer* buffer) {
149    SurfaceTextureClient* c = getSelf(window);
150    return c->cancelBuffer(buffer, -1);
151}
152
153int SurfaceTextureClient::hook_lockBuffer_DEPRECATED(ANativeWindow* window,
154        ANativeWindowBuffer* buffer) {
155    SurfaceTextureClient* c = getSelf(window);
156    return c->lockBuffer_DEPRECATED(buffer);
157}
158
159int SurfaceTextureClient::hook_queueBuffer_DEPRECATED(ANativeWindow* window,
160        ANativeWindowBuffer* buffer) {
161    SurfaceTextureClient* c = getSelf(window);
162    return c->queueBuffer(buffer, -1);
163}
164
165int SurfaceTextureClient::hook_query(const ANativeWindow* window,
166                                int what, int* value) {
167    const SurfaceTextureClient* c = getSelf(window);
168    return c->query(what, value);
169}
170
171int SurfaceTextureClient::hook_perform(ANativeWindow* window, int operation, ...) {
172    va_list args;
173    va_start(args, operation);
174    SurfaceTextureClient* c = getSelf(window);
175    return c->perform(operation, args);
176}
177
178int SurfaceTextureClient::setSwapInterval(int interval) {
179    ATRACE_CALL();
180    // EGL specification states:
181    //  interval is silently clamped to minimum and maximum implementation
182    //  dependent values before being stored.
183    // Although we don't have to, we apply the same logic here.
184
185    if (interval < minSwapInterval)
186        interval = minSwapInterval;
187
188    if (interval > maxSwapInterval)
189        interval = maxSwapInterval;
190
191    status_t res = mSurfaceTexture->setSynchronousMode(interval ? true : false);
192
193    return res;
194}
195
196int SurfaceTextureClient::dequeueBuffer(android_native_buffer_t** buffer,
197        int* fenceFd) {
198    ATRACE_CALL();
199    ALOGV("SurfaceTextureClient::dequeueBuffer");
200    Mutex::Autolock lock(mMutex);
201    int buf = -1;
202    int reqW = mReqWidth ? mReqWidth : mUserWidth;
203    int reqH = mReqHeight ? mReqHeight : mUserHeight;
204    sp<Fence> fence;
205    status_t result = mSurfaceTexture->dequeueBuffer(&buf, fence, reqW, reqH,
206            mReqFormat, mReqUsage);
207    if (result < 0) {
208        ALOGV("dequeueBuffer: ISurfaceTexture::dequeueBuffer(%d, %d, %d, %d)"
209             "failed: %d", mReqWidth, mReqHeight, mReqFormat, mReqUsage,
210             result);
211        return result;
212    }
213    sp<GraphicBuffer>& gbuf(mSlots[buf].buffer);
214    if (result & ISurfaceTexture::RELEASE_ALL_BUFFERS) {
215        freeAllBuffers();
216    }
217
218    if ((result & ISurfaceTexture::BUFFER_NEEDS_REALLOCATION) || gbuf == 0) {
219        result = mSurfaceTexture->requestBuffer(buf, &gbuf);
220        if (result != NO_ERROR) {
221            ALOGE("dequeueBuffer: ISurfaceTexture::requestBuffer failed: %d",
222                    result);
223            return result;
224        }
225    }
226
227    if (fence.get()) {
228        *fenceFd = fence->dup();
229        if (*fenceFd == -1) {
230            ALOGE("dequeueBuffer: error duping fence: %d", errno);
231            // dup() should never fail; something is badly wrong. Soldier on
232            // and hope for the best; the worst that should happen is some
233            // visible corruption that lasts until the next frame.
234        }
235    } else {
236        *fenceFd = -1;
237    }
238
239    *buffer = gbuf.get();
240    return OK;
241}
242
243int SurfaceTextureClient::cancelBuffer(android_native_buffer_t* buffer,
244        int fenceFd) {
245    ATRACE_CALL();
246    ALOGV("SurfaceTextureClient::cancelBuffer");
247    Mutex::Autolock lock(mMutex);
248    int i = getSlotFromBufferLocked(buffer);
249    if (i < 0) {
250        return i;
251    }
252    sp<Fence> fence(fenceFd >= 0 ? new Fence(fenceFd) : NULL);
253    mSurfaceTexture->cancelBuffer(i, fence);
254    return OK;
255}
256
257int SurfaceTextureClient::getSlotFromBufferLocked(
258        android_native_buffer_t* buffer) const {
259    bool dumpedState = false;
260    for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
261        if (mSlots[i].buffer != NULL &&
262                mSlots[i].buffer->handle == buffer->handle) {
263            return i;
264        }
265    }
266    ALOGE("getSlotFromBufferLocked: unknown buffer: %p", buffer->handle);
267    return BAD_VALUE;
268}
269
270int SurfaceTextureClient::lockBuffer_DEPRECATED(android_native_buffer_t* buffer) {
271    ALOGV("SurfaceTextureClient::lockBuffer");
272    Mutex::Autolock lock(mMutex);
273    return OK;
274}
275
276int SurfaceTextureClient::queueBuffer(android_native_buffer_t* buffer, int fenceFd) {
277    ATRACE_CALL();
278    ALOGV("SurfaceTextureClient::queueBuffer");
279    Mutex::Autolock lock(mMutex);
280    int64_t timestamp;
281    if (mTimestamp == NATIVE_WINDOW_TIMESTAMP_AUTO) {
282        timestamp = systemTime(SYSTEM_TIME_MONOTONIC);
283        ALOGV("SurfaceTextureClient::queueBuffer making up timestamp: %.2f ms",
284             timestamp / 1000000.f);
285    } else {
286        timestamp = mTimestamp;
287    }
288    int i = getSlotFromBufferLocked(buffer);
289    if (i < 0) {
290        return i;
291    }
292
293
294    // Make sure the crop rectangle is entirely inside the buffer.
295    Rect crop;
296    mCrop.intersect(Rect(buffer->width, buffer->height), &crop);
297
298    sp<Fence> fence(fenceFd >= 0 ? new Fence(fenceFd) : NULL);
299    ISurfaceTexture::QueueBufferOutput output;
300    ISurfaceTexture::QueueBufferInput input(timestamp, crop, mScalingMode,
301            mTransform, fence);
302    status_t err = mSurfaceTexture->queueBuffer(i, input, &output);
303    if (err != OK)  {
304        ALOGE("queueBuffer: error queuing buffer to SurfaceTexture, %d", err);
305    }
306    uint32_t numPendingBuffers = 0;
307    output.deflate(&mDefaultWidth, &mDefaultHeight, &mTransformHint,
308            &numPendingBuffers);
309
310    mConsumerRunningBehind = (numPendingBuffers >= 2);
311
312    return err;
313}
314
315int SurfaceTextureClient::query(int what, int* value) const {
316    ATRACE_CALL();
317    ALOGV("SurfaceTextureClient::query");
318    { // scope for the lock
319        Mutex::Autolock lock(mMutex);
320        switch (what) {
321            case NATIVE_WINDOW_FORMAT:
322                if (mReqFormat) {
323                    *value = mReqFormat;
324                    return NO_ERROR;
325                }
326                break;
327            case NATIVE_WINDOW_QUEUES_TO_WINDOW_COMPOSER: {
328                sp<ISurfaceComposer> composer(
329                        ComposerService::getComposerService());
330                if (composer->authenticateSurfaceTexture(mSurfaceTexture)) {
331                    *value = 1;
332                } else {
333                    *value = 0;
334                }
335                return NO_ERROR;
336            }
337            case NATIVE_WINDOW_CONCRETE_TYPE:
338                *value = NATIVE_WINDOW_SURFACE_TEXTURE_CLIENT;
339                return NO_ERROR;
340            case NATIVE_WINDOW_DEFAULT_WIDTH:
341                *value = mUserWidth ? mUserWidth : mDefaultWidth;
342                return NO_ERROR;
343            case NATIVE_WINDOW_DEFAULT_HEIGHT:
344                *value = mUserHeight ? mUserHeight : mDefaultHeight;
345                return NO_ERROR;
346            case NATIVE_WINDOW_TRANSFORM_HINT:
347                *value = mTransformHint;
348                return NO_ERROR;
349            case NATIVE_WINDOW_CONSUMER_RUNNING_BEHIND: {
350                status_t err = NO_ERROR;
351                if (!mConsumerRunningBehind) {
352                    *value = 0;
353                } else {
354                    err = mSurfaceTexture->query(what, value);
355                    if (err == NO_ERROR) {
356                        mConsumerRunningBehind = *value;
357                    }
358                }
359                return err;
360            }
361        }
362    }
363    return mSurfaceTexture->query(what, value);
364}
365
366int SurfaceTextureClient::perform(int operation, va_list args)
367{
368    int res = NO_ERROR;
369    switch (operation) {
370    case NATIVE_WINDOW_CONNECT:
371        // deprecated. must return NO_ERROR.
372        break;
373    case NATIVE_WINDOW_DISCONNECT:
374        // deprecated. must return NO_ERROR.
375        break;
376    case NATIVE_WINDOW_SET_USAGE:
377        res = dispatchSetUsage(args);
378        break;
379    case NATIVE_WINDOW_SET_CROP:
380        res = dispatchSetCrop(args);
381        break;
382    case NATIVE_WINDOW_SET_BUFFER_COUNT:
383        res = dispatchSetBufferCount(args);
384        break;
385    case NATIVE_WINDOW_SET_BUFFERS_GEOMETRY:
386        res = dispatchSetBuffersGeometry(args);
387        break;
388    case NATIVE_WINDOW_SET_BUFFERS_TRANSFORM:
389        res = dispatchSetBuffersTransform(args);
390        break;
391    case NATIVE_WINDOW_SET_BUFFERS_TIMESTAMP:
392        res = dispatchSetBuffersTimestamp(args);
393        break;
394    case NATIVE_WINDOW_SET_BUFFERS_DIMENSIONS:
395        res = dispatchSetBuffersDimensions(args);
396        break;
397    case NATIVE_WINDOW_SET_BUFFERS_USER_DIMENSIONS:
398        res = dispatchSetBuffersUserDimensions(args);
399        break;
400    case NATIVE_WINDOW_SET_BUFFERS_FORMAT:
401        res = dispatchSetBuffersFormat(args);
402        break;
403    case NATIVE_WINDOW_LOCK:
404        res = dispatchLock(args);
405        break;
406    case NATIVE_WINDOW_UNLOCK_AND_POST:
407        res = dispatchUnlockAndPost(args);
408        break;
409    case NATIVE_WINDOW_SET_SCALING_MODE:
410        res = dispatchSetScalingMode(args);
411        break;
412    case NATIVE_WINDOW_API_CONNECT:
413        res = dispatchConnect(args);
414        break;
415    case NATIVE_WINDOW_API_DISCONNECT:
416        res = dispatchDisconnect(args);
417        break;
418    default:
419        res = NAME_NOT_FOUND;
420        break;
421    }
422    return res;
423}
424
425int SurfaceTextureClient::dispatchConnect(va_list args) {
426    int api = va_arg(args, int);
427    return connect(api);
428}
429
430int SurfaceTextureClient::dispatchDisconnect(va_list args) {
431    int api = va_arg(args, int);
432    return disconnect(api);
433}
434
435int SurfaceTextureClient::dispatchSetUsage(va_list args) {
436    int usage = va_arg(args, int);
437    return setUsage(usage);
438}
439
440int SurfaceTextureClient::dispatchSetCrop(va_list args) {
441    android_native_rect_t const* rect = va_arg(args, android_native_rect_t*);
442    return setCrop(reinterpret_cast<Rect const*>(rect));
443}
444
445int SurfaceTextureClient::dispatchSetBufferCount(va_list args) {
446    size_t bufferCount = va_arg(args, size_t);
447    return setBufferCount(bufferCount);
448}
449
450int SurfaceTextureClient::dispatchSetBuffersGeometry(va_list args) {
451    int w = va_arg(args, int);
452    int h = va_arg(args, int);
453    int f = va_arg(args, int);
454    int err = setBuffersDimensions(w, h);
455    if (err != 0) {
456        return err;
457    }
458    return setBuffersFormat(f);
459}
460
461int SurfaceTextureClient::dispatchSetBuffersDimensions(va_list args) {
462    int w = va_arg(args, int);
463    int h = va_arg(args, int);
464    return setBuffersDimensions(w, h);
465}
466
467int SurfaceTextureClient::dispatchSetBuffersUserDimensions(va_list args) {
468    int w = va_arg(args, int);
469    int h = va_arg(args, int);
470    return setBuffersUserDimensions(w, h);
471}
472
473int SurfaceTextureClient::dispatchSetBuffersFormat(va_list args) {
474    int f = va_arg(args, int);
475    return setBuffersFormat(f);
476}
477
478int SurfaceTextureClient::dispatchSetScalingMode(va_list args) {
479    int m = va_arg(args, int);
480    return setScalingMode(m);
481}
482
483int SurfaceTextureClient::dispatchSetBuffersTransform(va_list args) {
484    int transform = va_arg(args, int);
485    return setBuffersTransform(transform);
486}
487
488int SurfaceTextureClient::dispatchSetBuffersTimestamp(va_list args) {
489    int64_t timestamp = va_arg(args, int64_t);
490    return setBuffersTimestamp(timestamp);
491}
492
493int SurfaceTextureClient::dispatchLock(va_list args) {
494    ANativeWindow_Buffer* outBuffer = va_arg(args, ANativeWindow_Buffer*);
495    ARect* inOutDirtyBounds = va_arg(args, ARect*);
496    return lock(outBuffer, inOutDirtyBounds);
497}
498
499int SurfaceTextureClient::dispatchUnlockAndPost(va_list args) {
500    return unlockAndPost();
501}
502
503
504int SurfaceTextureClient::connect(int api) {
505    ATRACE_CALL();
506    ALOGV("SurfaceTextureClient::connect");
507    Mutex::Autolock lock(mMutex);
508    ISurfaceTexture::QueueBufferOutput output;
509    int err = mSurfaceTexture->connect(api, &output);
510    if (err == NO_ERROR) {
511        uint32_t numPendingBuffers = 0;
512        output.deflate(&mDefaultWidth, &mDefaultHeight, &mTransformHint,
513                &numPendingBuffers);
514        mConsumerRunningBehind = (numPendingBuffers >= 2);
515    }
516    if (!err && api == NATIVE_WINDOW_API_CPU) {
517        mConnectedToCpu = true;
518    }
519    return err;
520}
521
522int SurfaceTextureClient::disconnect(int api) {
523    ATRACE_CALL();
524    ALOGV("SurfaceTextureClient::disconnect");
525    Mutex::Autolock lock(mMutex);
526    freeAllBuffers();
527    int err = mSurfaceTexture->disconnect(api);
528    if (!err) {
529        mReqFormat = 0;
530        mReqWidth = 0;
531        mReqHeight = 0;
532        mReqUsage = 0;
533        mCrop.clear();
534        mScalingMode = NATIVE_WINDOW_SCALING_MODE_FREEZE;
535        mTransform = 0;
536        if (api == NATIVE_WINDOW_API_CPU) {
537            mConnectedToCpu = false;
538        }
539    }
540    return err;
541}
542
543int SurfaceTextureClient::setUsage(uint32_t reqUsage)
544{
545    ALOGV("SurfaceTextureClient::setUsage");
546    Mutex::Autolock lock(mMutex);
547    mReqUsage = reqUsage;
548    return OK;
549}
550
551int SurfaceTextureClient::setCrop(Rect const* rect)
552{
553    ATRACE_CALL();
554
555    Rect realRect;
556    if (rect == NULL || rect->isEmpty()) {
557        realRect.clear();
558    } else {
559        realRect = *rect;
560    }
561
562    ALOGV("SurfaceTextureClient::setCrop rect=[%d %d %d %d]",
563            realRect.left, realRect.top, realRect.right, realRect.bottom);
564
565    Mutex::Autolock lock(mMutex);
566    mCrop = realRect;
567    return NO_ERROR;
568}
569
570int SurfaceTextureClient::setBufferCount(int bufferCount)
571{
572    ATRACE_CALL();
573    ALOGV("SurfaceTextureClient::setBufferCount");
574    Mutex::Autolock lock(mMutex);
575
576    status_t err = mSurfaceTexture->setBufferCount(bufferCount);
577    ALOGE_IF(err, "ISurfaceTexture::setBufferCount(%d) returned %s",
578            bufferCount, strerror(-err));
579
580    if (err == NO_ERROR) {
581        freeAllBuffers();
582    }
583
584    return err;
585}
586
587int SurfaceTextureClient::setBuffersDimensions(int w, int h)
588{
589    ATRACE_CALL();
590    ALOGV("SurfaceTextureClient::setBuffersDimensions");
591
592    if (w<0 || h<0)
593        return BAD_VALUE;
594
595    if ((w && !h) || (!w && h))
596        return BAD_VALUE;
597
598    Mutex::Autolock lock(mMutex);
599    mReqWidth = w;
600    mReqHeight = h;
601    return NO_ERROR;
602}
603
604int SurfaceTextureClient::setBuffersUserDimensions(int w, int h)
605{
606    ATRACE_CALL();
607    ALOGV("SurfaceTextureClient::setBuffersUserDimensions");
608
609    if (w<0 || h<0)
610        return BAD_VALUE;
611
612    if ((w && !h) || (!w && h))
613        return BAD_VALUE;
614
615    Mutex::Autolock lock(mMutex);
616    mUserWidth = w;
617    mUserHeight = h;
618    return NO_ERROR;
619}
620
621int SurfaceTextureClient::setBuffersFormat(int format)
622{
623    ALOGV("SurfaceTextureClient::setBuffersFormat");
624
625    if (format<0)
626        return BAD_VALUE;
627
628    Mutex::Autolock lock(mMutex);
629    mReqFormat = format;
630    return NO_ERROR;
631}
632
633int SurfaceTextureClient::setScalingMode(int mode)
634{
635    ATRACE_CALL();
636    ALOGV("SurfaceTextureClient::setScalingMode(%d)", mode);
637
638    switch (mode) {
639        case NATIVE_WINDOW_SCALING_MODE_FREEZE:
640        case NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW:
641        case NATIVE_WINDOW_SCALING_MODE_SCALE_CROP:
642            break;
643        default:
644            ALOGE("unknown scaling mode: %d", mode);
645            return BAD_VALUE;
646    }
647
648    Mutex::Autolock lock(mMutex);
649    mScalingMode = mode;
650    return NO_ERROR;
651}
652
653int SurfaceTextureClient::setBuffersTransform(int transform)
654{
655    ATRACE_CALL();
656    ALOGV("SurfaceTextureClient::setBuffersTransform");
657    Mutex::Autolock lock(mMutex);
658    mTransform = transform;
659    return NO_ERROR;
660}
661
662int SurfaceTextureClient::setBuffersTimestamp(int64_t timestamp)
663{
664    ALOGV("SurfaceTextureClient::setBuffersTimestamp");
665    Mutex::Autolock lock(mMutex);
666    mTimestamp = timestamp;
667    return NO_ERROR;
668}
669
670void SurfaceTextureClient::freeAllBuffers() {
671    for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
672        mSlots[i].buffer = 0;
673    }
674}
675
676// ----------------------------------------------------------------------
677// the lock/unlock APIs must be used from the same thread
678
679static status_t copyBlt(
680        const sp<GraphicBuffer>& dst,
681        const sp<GraphicBuffer>& src,
682        const Region& reg)
683{
684    // src and dst with, height and format must be identical. no verification
685    // is done here.
686    status_t err;
687    uint8_t const * src_bits = NULL;
688    err = src->lock(GRALLOC_USAGE_SW_READ_OFTEN, reg.bounds(), (void**)&src_bits);
689    ALOGE_IF(err, "error locking src buffer %s", strerror(-err));
690
691    uint8_t* dst_bits = NULL;
692    err = dst->lock(GRALLOC_USAGE_SW_WRITE_OFTEN, reg.bounds(), (void**)&dst_bits);
693    ALOGE_IF(err, "error locking dst buffer %s", strerror(-err));
694
695    Region::const_iterator head(reg.begin());
696    Region::const_iterator tail(reg.end());
697    if (head != tail && src_bits && dst_bits) {
698        const size_t bpp = bytesPerPixel(src->format);
699        const size_t dbpr = dst->stride * bpp;
700        const size_t sbpr = src->stride * bpp;
701
702        while (head != tail) {
703            const Rect& r(*head++);
704            ssize_t h = r.height();
705            if (h <= 0) continue;
706            size_t size = r.width() * bpp;
707            uint8_t const * s = src_bits + (r.left + src->stride * r.top) * bpp;
708            uint8_t       * d = dst_bits + (r.left + dst->stride * r.top) * bpp;
709            if (dbpr==sbpr && size==sbpr) {
710                size *= h;
711                h = 1;
712            }
713            do {
714                memcpy(d, s, size);
715                d += dbpr;
716                s += sbpr;
717            } while (--h > 0);
718        }
719    }
720
721    if (src_bits)
722        src->unlock();
723
724    if (dst_bits)
725        dst->unlock();
726
727    return err;
728}
729
730// ----------------------------------------------------------------------------
731
732status_t SurfaceTextureClient::lock(
733        ANativeWindow_Buffer* outBuffer, ARect* inOutDirtyBounds)
734{
735    if (mLockedBuffer != 0) {
736        ALOGE("Surface::lock failed, already locked");
737        return INVALID_OPERATION;
738    }
739
740    if (!mConnectedToCpu) {
741        int err = SurfaceTextureClient::connect(NATIVE_WINDOW_API_CPU);
742        if (err) {
743            return err;
744        }
745        // we're intending to do software rendering from this point
746        setUsage(GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN);
747    }
748
749    ANativeWindowBuffer* out;
750    int fenceFd = -1;
751    status_t err = dequeueBuffer(&out, &fenceFd);
752    ALOGE_IF(err, "dequeueBuffer failed (%s)", strerror(-err));
753    if (err == NO_ERROR) {
754        sp<GraphicBuffer> backBuffer(GraphicBuffer::getSelf(out));
755        sp<Fence> fence(new Fence(fenceFd));
756
757        err = fence->waitForever(1000, "SurfaceTextureClient::lock");
758        if (err != OK) {
759            ALOGE("Fence::wait failed (%s)", strerror(-err));
760            cancelBuffer(out, fenceFd);
761            return err;
762        }
763
764        const Rect bounds(backBuffer->width, backBuffer->height);
765
766        Region newDirtyRegion;
767        if (inOutDirtyBounds) {
768            newDirtyRegion.set(static_cast<Rect const&>(*inOutDirtyBounds));
769            newDirtyRegion.andSelf(bounds);
770        } else {
771            newDirtyRegion.set(bounds);
772        }
773
774        // figure out if we can copy the frontbuffer back
775        const sp<GraphicBuffer>& frontBuffer(mPostedBuffer);
776        const bool canCopyBack = (frontBuffer != 0 &&
777                backBuffer->width  == frontBuffer->width &&
778                backBuffer->height == frontBuffer->height &&
779                backBuffer->format == frontBuffer->format);
780
781        if (canCopyBack) {
782            // copy the area that is invalid and not repainted this round
783            const Region copyback(mDirtyRegion.subtract(newDirtyRegion));
784            if (!copyback.isEmpty())
785                copyBlt(backBuffer, frontBuffer, copyback);
786        } else {
787            // if we can't copy-back anything, modify the user's dirty
788            // region to make sure they redraw the whole buffer
789            newDirtyRegion.set(bounds);
790            mDirtyRegion.clear();
791            Mutex::Autolock lock(mMutex);
792            for (size_t i=0 ; i<NUM_BUFFER_SLOTS ; i++) {
793                mSlots[i].dirtyRegion.clear();
794            }
795        }
796
797
798        { // scope for the lock
799            Mutex::Autolock lock(mMutex);
800            int backBufferSlot(getSlotFromBufferLocked(backBuffer.get()));
801            if (backBufferSlot >= 0) {
802                Region& dirtyRegion(mSlots[backBufferSlot].dirtyRegion);
803                mDirtyRegion.subtract(dirtyRegion);
804                dirtyRegion = newDirtyRegion;
805            }
806        }
807
808        mDirtyRegion.orSelf(newDirtyRegion);
809        if (inOutDirtyBounds) {
810            *inOutDirtyBounds = newDirtyRegion.getBounds();
811        }
812
813        void* vaddr;
814        status_t res = backBuffer->lock(
815                GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN,
816                newDirtyRegion.bounds(), &vaddr);
817
818        ALOGW_IF(res, "failed locking buffer (handle = %p)",
819                backBuffer->handle);
820
821        if (res != 0) {
822            err = INVALID_OPERATION;
823        } else {
824            mLockedBuffer = backBuffer;
825            outBuffer->width  = backBuffer->width;
826            outBuffer->height = backBuffer->height;
827            outBuffer->stride = backBuffer->stride;
828            outBuffer->format = backBuffer->format;
829            outBuffer->bits   = vaddr;
830        }
831    }
832    return err;
833}
834
835status_t SurfaceTextureClient::unlockAndPost()
836{
837    if (mLockedBuffer == 0) {
838        ALOGE("Surface::unlockAndPost failed, no locked buffer");
839        return INVALID_OPERATION;
840    }
841
842    status_t err = mLockedBuffer->unlock();
843    ALOGE_IF(err, "failed unlocking buffer (%p)", mLockedBuffer->handle);
844
845    err = queueBuffer(mLockedBuffer.get(), -1);
846    ALOGE_IF(err, "queueBuffer (handle=%p) failed (%s)",
847            mLockedBuffer->handle, strerror(-err));
848
849    mPostedBuffer = mLockedBuffer;
850    mLockedBuffer = 0;
851    return err;
852}
853
854}; // namespace android
855