OMX.cpp revision 52e71f87f1dac8d2f6bcaf77bb25b78cba664c43 
1/*
2 * Copyright (C) 2009 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 "OMX"
19#include <utils/Log.h>
20
21#include <dlfcn.h>
22#include <linux/prctl.h>
23#include <sys/resource.h>
24
25#include "../include/OMX.h"
26#include "OMXRenderer.h"
27
28#include "../include/OMXNodeInstance.h"
29#include "../include/SoftwareRenderer.h"
30
31#include <binder/IMemory.h>
32#include <media/stagefright/MediaDebug.h>
33#include <media/stagefright/VideoRenderer.h>
34#include <utils/threads.h>
35
36#include "OMXMaster.h"
37
38#include <OMX_Component.h>
39
40namespace android {
41
42////////////////////////////////////////////////////////////////////////////////
43
44struct OMX::CallbackDispatcher : public RefBase {
45    CallbackDispatcher(OMX *owner);
46
47    void post(const omx_message &msg);
48
49protected:
50    virtual ~CallbackDispatcher();
51
52private:
53    Mutex mLock;
54
55    OMX *mOwner;
56    bool mDone;
57    Condition mQueueChanged;
58    List<omx_message> mQueue;
59
60    pthread_t mThread;
61
62    void dispatch(const omx_message &msg);
63
64    static void *ThreadWrapper(void *me);
65    void threadEntry();
66
67    CallbackDispatcher(const CallbackDispatcher &);
68    CallbackDispatcher &operator=(const CallbackDispatcher &);
69};
70
71OMX::CallbackDispatcher::CallbackDispatcher(OMX *owner)
72    : mOwner(owner),
73      mDone(false) {
74    pthread_attr_t attr;
75    pthread_attr_init(&attr);
76    pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
77
78    pthread_create(&mThread, &attr, ThreadWrapper, this);
79
80    pthread_attr_destroy(&attr);
81}
82
83OMX::CallbackDispatcher::~CallbackDispatcher() {
84    {
85        Mutex::Autolock autoLock(mLock);
86
87        mDone = true;
88        mQueueChanged.signal();
89    }
90
91    void *dummy;
92    pthread_join(mThread, &dummy);
93}
94
95void OMX::CallbackDispatcher::post(const omx_message &msg) {
96    Mutex::Autolock autoLock(mLock);
97
98    mQueue.push_back(msg);
99    mQueueChanged.signal();
100}
101
102void OMX::CallbackDispatcher::dispatch(const omx_message &msg) {
103    OMXNodeInstance *instance = mOwner->findInstance(msg.node);
104    if (instance == NULL) {
105        LOGV("Would have dispatched a message to a node that's already gone.");
106        return;
107    }
108    instance->onMessage(msg);
109}
110
111// static
112void *OMX::CallbackDispatcher::ThreadWrapper(void *me) {
113    static_cast<CallbackDispatcher *>(me)->threadEntry();
114
115    return NULL;
116}
117
118void OMX::CallbackDispatcher::threadEntry() {
119    setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_AUDIO);
120    prctl(PR_SET_NAME, (unsigned long)"OMXCallbackDisp", 0, 0, 0);
121
122    for (;;) {
123        omx_message msg;
124
125        {
126            Mutex::Autolock autoLock(mLock);
127            while (!mDone && mQueue.empty()) {
128                mQueueChanged.wait(mLock);
129            }
130
131            if (mDone) {
132                break;
133            }
134
135            msg = *mQueue.begin();
136            mQueue.erase(mQueue.begin());
137        }
138
139        dispatch(msg);
140    }
141}
142
143////////////////////////////////////////////////////////////////////////////////
144
145OMX::OMX()
146    : mMaster(new OMXMaster),
147      mDispatcher(new CallbackDispatcher(this)),
148      mNodeCounter(0) {
149}
150
151OMX::~OMX() {
152    delete mMaster;
153    mMaster = NULL;
154}
155
156void OMX::binderDied(const wp<IBinder> &the_late_who) {
157    OMXNodeInstance *instance;
158
159    {
160        Mutex::Autolock autoLock(mLock);
161
162        ssize_t index = mLiveNodes.indexOfKey(the_late_who);
163        CHECK(index >= 0);
164
165        instance = mLiveNodes.editValueAt(index);
166        mLiveNodes.removeItemsAt(index);
167
168        invalidateNodeID_l(instance->nodeID());
169    }
170
171    instance->onObserverDied(mMaster);
172}
173
174bool OMX::livesLocally(pid_t pid) {
175    return pid == getpid();
176}
177
178status_t OMX::listNodes(List<ComponentInfo> *list) {
179    list->clear();
180
181    OMX_U32 index = 0;
182    char componentName[256];
183    while (mMaster->enumerateComponents(
184                componentName, sizeof(componentName), index) == OMX_ErrorNone) {
185        list->push_back(ComponentInfo());
186        ComponentInfo &info = *--list->end();
187
188        info.mName = componentName;
189
190        Vector<String8> roles;
191        OMX_ERRORTYPE err =
192            mMaster->getRolesOfComponent(componentName, &roles);
193
194        if (err == OMX_ErrorNone) {
195            for (OMX_U32 i = 0; i < roles.size(); ++i) {
196                info.mRoles.push_back(roles[i]);
197            }
198        }
199
200        ++index;
201    }
202
203    return OK;
204}
205
206status_t OMX::allocateNode(
207        const char *name, const sp<IOMXObserver> &observer, node_id *node) {
208    Mutex::Autolock autoLock(mLock);
209
210    *node = 0;
211
212    OMXNodeInstance *instance = new OMXNodeInstance(this, observer);
213
214    OMX_COMPONENTTYPE *handle;
215    OMX_ERRORTYPE err = mMaster->makeComponentInstance(
216            name, &OMXNodeInstance::kCallbacks,
217            instance, &handle);
218
219    if (err != OMX_ErrorNone) {
220        LOGV("FAILED to allocate omx component '%s'", name);
221
222        instance->onGetHandleFailed();
223
224        return UNKNOWN_ERROR;
225    }
226
227    *node = makeNodeID(instance);
228
229    instance->setHandle(*node, handle);
230
231    mLiveNodes.add(observer->asBinder(), instance);
232    observer->asBinder()->linkToDeath(this);
233
234    return OK;
235}
236
237status_t OMX::freeNode(node_id node) {
238    OMXNodeInstance *instance = findInstance(node);
239
240    ssize_t index = mLiveNodes.indexOfKey(instance->observer()->asBinder());
241    CHECK(index >= 0);
242    mLiveNodes.removeItemsAt(index);
243    instance->observer()->asBinder()->unlinkToDeath(this);
244
245    return instance->freeNode(mMaster);
246}
247
248status_t OMX::sendCommand(
249        node_id node, OMX_COMMANDTYPE cmd, OMX_S32 param) {
250    return findInstance(node)->sendCommand(cmd, param);
251}
252
253status_t OMX::getParameter(
254        node_id node, OMX_INDEXTYPE index,
255        void *params, size_t size) {
256    return findInstance(node)->getParameter(
257            index, params, size);
258}
259
260status_t OMX::setParameter(
261        node_id node, OMX_INDEXTYPE index,
262        const void *params, size_t size) {
263    return findInstance(node)->setParameter(
264            index, params, size);
265}
266
267status_t OMX::getConfig(
268        node_id node, OMX_INDEXTYPE index,
269        void *params, size_t size) {
270    return findInstance(node)->getConfig(
271            index, params, size);
272}
273
274status_t OMX::setConfig(
275        node_id node, OMX_INDEXTYPE index,
276        const void *params, size_t size) {
277    return findInstance(node)->setConfig(
278            index, params, size);
279}
280
281status_t OMX::useBuffer(
282        node_id node, OMX_U32 port_index, const sp<IMemory> &params,
283        buffer_id *buffer) {
284    return findInstance(node)->useBuffer(
285            port_index, params, buffer);
286}
287
288status_t OMX::allocateBuffer(
289        node_id node, OMX_U32 port_index, size_t size,
290        buffer_id *buffer, void **buffer_data) {
291    return findInstance(node)->allocateBuffer(
292            port_index, size, buffer, buffer_data);
293}
294
295status_t OMX::allocateBufferWithBackup(
296        node_id node, OMX_U32 port_index, const sp<IMemory> &params,
297        buffer_id *buffer) {
298    return findInstance(node)->allocateBufferWithBackup(
299            port_index, params, buffer);
300}
301
302status_t OMX::freeBuffer(node_id node, OMX_U32 port_index, buffer_id buffer) {
303    return findInstance(node)->freeBuffer(
304            port_index, buffer);
305}
306
307status_t OMX::fillBuffer(node_id node, buffer_id buffer) {
308    return findInstance(node)->fillBuffer(buffer);
309}
310
311status_t OMX::emptyBuffer(
312        node_id node,
313        buffer_id buffer,
314        OMX_U32 range_offset, OMX_U32 range_length,
315        OMX_U32 flags, OMX_TICKS timestamp) {
316    return findInstance(node)->emptyBuffer(
317            buffer, range_offset, range_length, flags, timestamp);
318}
319
320status_t OMX::getExtensionIndex(
321        node_id node,
322        const char *parameter_name,
323        OMX_INDEXTYPE *index) {
324    return findInstance(node)->getExtensionIndex(
325            parameter_name, index);
326}
327
328OMX_ERRORTYPE OMX::OnEvent(
329        node_id node,
330        OMX_IN OMX_EVENTTYPE eEvent,
331        OMX_IN OMX_U32 nData1,
332        OMX_IN OMX_U32 nData2,
333        OMX_IN OMX_PTR pEventData) {
334    LOGV("OnEvent(%d, %ld, %ld)", eEvent, nData1, nData2);
335
336    omx_message msg;
337    msg.type = omx_message::EVENT;
338    msg.node = node;
339    msg.u.event_data.event = eEvent;
340    msg.u.event_data.data1 = nData1;
341    msg.u.event_data.data2 = nData2;
342
343    mDispatcher->post(msg);
344
345    return OMX_ErrorNone;
346}
347
348OMX_ERRORTYPE OMX::OnEmptyBufferDone(
349        node_id node, OMX_IN OMX_BUFFERHEADERTYPE *pBuffer) {
350    LOGV("OnEmptyBufferDone buffer=%p", pBuffer);
351
352    omx_message msg;
353    msg.type = omx_message::EMPTY_BUFFER_DONE;
354    msg.node = node;
355    msg.u.buffer_data.buffer = pBuffer;
356
357    mDispatcher->post(msg);
358
359    return OMX_ErrorNone;
360}
361
362OMX_ERRORTYPE OMX::OnFillBufferDone(
363        node_id node, OMX_IN OMX_BUFFERHEADERTYPE *pBuffer) {
364    LOGV("OnFillBufferDone buffer=%p", pBuffer);
365
366    omx_message msg;
367    msg.type = omx_message::FILL_BUFFER_DONE;
368    msg.node = node;
369    msg.u.extended_buffer_data.buffer = pBuffer;
370    msg.u.extended_buffer_data.range_offset = pBuffer->nOffset;
371    msg.u.extended_buffer_data.range_length = pBuffer->nFilledLen;
372    msg.u.extended_buffer_data.flags = pBuffer->nFlags;
373    msg.u.extended_buffer_data.timestamp = pBuffer->nTimeStamp;
374    msg.u.extended_buffer_data.platform_private = pBuffer->pPlatformPrivate;
375    msg.u.extended_buffer_data.data_ptr = pBuffer->pBuffer;
376
377    mDispatcher->post(msg);
378
379    return OMX_ErrorNone;
380}
381
382OMX::node_id OMX::makeNodeID(OMXNodeInstance *instance) {
383    // mLock is already held.
384
385    node_id node = (node_id)++mNodeCounter;
386    mNodeIDToInstance.add(node, instance);
387
388    return node;
389}
390
391OMXNodeInstance *OMX::findInstance(node_id node) {
392    Mutex::Autolock autoLock(mLock);
393
394    ssize_t index = mNodeIDToInstance.indexOfKey(node);
395
396    return index < 0 ? NULL : mNodeIDToInstance.valueAt(index);
397}
398
399void OMX::invalidateNodeID(node_id node) {
400    Mutex::Autolock autoLock(mLock);
401    invalidateNodeID_l(node);
402}
403
404void OMX::invalidateNodeID_l(node_id node) {
405    // mLock is held.
406    mNodeIDToInstance.removeItem(node);
407}
408
409////////////////////////////////////////////////////////////////////////////////
410
411struct SharedVideoRenderer : public VideoRenderer {
412    SharedVideoRenderer(void *libHandle, VideoRenderer *obj)
413        : mLibHandle(libHandle),
414          mObj(obj) {
415    }
416
417    virtual ~SharedVideoRenderer() {
418        delete mObj;
419        mObj = NULL;
420
421        dlclose(mLibHandle);
422        mLibHandle = NULL;
423    }
424
425    virtual void render(
426            const void *data, size_t size, void *platformPrivate) {
427        return mObj->render(data, size, platformPrivate);
428    }
429
430private:
431    void *mLibHandle;
432    VideoRenderer *mObj;
433
434    SharedVideoRenderer(const SharedVideoRenderer &);
435    SharedVideoRenderer &operator=(const SharedVideoRenderer &);
436};
437
438sp<IOMXRenderer> OMX::createRenderer(
439        const sp<ISurface> &surface,
440        const char *componentName,
441        OMX_COLOR_FORMATTYPE colorFormat,
442        size_t encodedWidth, size_t encodedHeight,
443        size_t displayWidth, size_t displayHeight) {
444    Mutex::Autolock autoLock(mLock);
445
446    VideoRenderer *impl = NULL;
447
448    void *libHandle = dlopen("libstagefrighthw.so", RTLD_NOW);
449
450    if (libHandle) {
451        typedef VideoRenderer *(*CreateRendererFunc)(
452                const sp<ISurface> &surface,
453                const char *componentName,
454                OMX_COLOR_FORMATTYPE colorFormat,
455                size_t displayWidth, size_t displayHeight,
456                size_t decodedWidth, size_t decodedHeight);
457
458        CreateRendererFunc func =
459            (CreateRendererFunc)dlsym(
460                    libHandle,
461                    "_Z14createRendererRKN7android2spINS_8ISurfaceEEEPKc20"
462                    "OMX_COLOR_FORMATTYPEjjjj");
463
464        if (func) {
465            impl = (*func)(surface, componentName, colorFormat,
466                    displayWidth, displayHeight, encodedWidth, encodedHeight);
467
468            if (impl) {
469                impl = new SharedVideoRenderer(libHandle, impl);
470                libHandle = NULL;
471            }
472        }
473
474        if (libHandle) {
475            dlclose(libHandle);
476            libHandle = NULL;
477        }
478    }
479
480    if (!impl) {
481        LOGW("Using software renderer.");
482        impl = new SoftwareRenderer(
483                colorFormat,
484                surface,
485                displayWidth, displayHeight,
486                encodedWidth, encodedHeight);
487    }
488
489    return new OMXRenderer(impl);
490}
491
492OMXRenderer::OMXRenderer(VideoRenderer *impl)
493    : mImpl(impl) {
494}
495
496OMXRenderer::~OMXRenderer() {
497    delete mImpl;
498    mImpl = NULL;
499}
500
501void OMXRenderer::render(IOMX::buffer_id buffer) {
502    OMX_BUFFERHEADERTYPE *header = (OMX_BUFFERHEADERTYPE *)buffer;
503
504    mImpl->render(
505            header->pBuffer + header->nOffset,
506            header->nFilledLen,
507            header->pPlatformPrivate);
508}
509
510}  // namespace android
511
512