NdkMediaCodec.cpp revision 050eb3280d7305b84f723d515be2dc9606dc39d1 
1/*
2 * Copyright (C) 2014 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 "NdkMediaCodec"
19
20#include "NdkMediaCodec.h"
21#include "NdkMediaError.h"
22#include "NdkMediaCryptoPriv.h"
23#include "NdkMediaFormatPriv.h"
24
25#include <utils/Log.h>
26#include <utils/StrongPointer.h>
27#include <gui/Surface.h>
28
29#include <media/stagefright/foundation/ALooper.h>
30#include <media/stagefright/foundation/AMessage.h>
31#include <media/stagefright/foundation/ABuffer.h>
32
33#include <media/stagefright/MediaCodec.h>
34#include <media/stagefright/MediaErrors.h>
35
36using namespace android;
37
38
39static int translate_error(status_t err) {
40    if (err == OK) {
41        return OK;
42    } else if (err == -EAGAIN) {
43        return AMEDIACODEC_INFO_TRY_AGAIN_LATER;
44    }
45    ALOGE("sf error code: %d", err);
46    return AMEDIAERROR_GENERIC;
47}
48
49enum {
50    kWhatActivityNotify,
51    kWhatRequestActivityNotifications,
52    kWhatStopActivityNotifications,
53};
54
55
56class CodecHandler: public AHandler {
57private:
58    AMediaCodec* mCodec;
59public:
60    CodecHandler(AMediaCodec *codec);
61    virtual void onMessageReceived(const sp<AMessage> &msg);
62};
63
64struct AMediaCodec {
65    sp<android::MediaCodec> mCodec;
66    sp<ALooper> mLooper;
67    sp<CodecHandler> mHandler;
68    sp<AMessage> mActivityNotification;
69    int32_t mGeneration;
70    bool mRequestedActivityNotification;
71    OnCodecEvent mCallback;
72    void *mCallbackUserData;
73};
74
75CodecHandler::CodecHandler(AMediaCodec *codec) {
76    mCodec = codec;
77}
78
79void CodecHandler::onMessageReceived(const sp<AMessage> &msg) {
80
81    switch (msg->what()) {
82        case kWhatRequestActivityNotifications:
83        {
84            if (mCodec->mRequestedActivityNotification) {
85                break;
86            }
87
88            mCodec->mCodec->requestActivityNotification(mCodec->mActivityNotification);
89            mCodec->mRequestedActivityNotification = true;
90            break;
91        }
92
93        case kWhatActivityNotify:
94        {
95            {
96                int32_t generation;
97                msg->findInt32("generation", &generation);
98
99                if (generation != mCodec->mGeneration) {
100                    // stale
101                    break;
102                }
103
104                mCodec->mRequestedActivityNotification = false;
105            }
106
107            if (mCodec->mCallback) {
108                mCodec->mCallback(mCodec, mCodec->mCallbackUserData);
109            }
110            break;
111        }
112
113        case kWhatStopActivityNotifications:
114        {
115            uint32_t replyID;
116            msg->senderAwaitsResponse(&replyID);
117
118            mCodec->mGeneration++;
119            mCodec->mRequestedActivityNotification = false;
120
121            sp<AMessage> response = new AMessage;
122            response->postReply(replyID);
123            break;
124        }
125
126        default:
127            ALOGE("shouldn't be here");
128            break;
129    }
130
131}
132
133
134static void requestActivityNotification(AMediaCodec *codec) {
135    (new AMessage(kWhatRequestActivityNotifications, codec->mHandler->id()))->post();
136}
137
138extern "C" {
139
140static AMediaCodec * createAMediaCodec(const char *name, bool name_is_type, bool encoder) {
141    AMediaCodec *mData = new AMediaCodec();
142    mData->mLooper = new ALooper;
143    mData->mLooper->setName("NDK MediaCodec_looper");
144    status_t ret = mData->mLooper->start(
145            false,      // runOnCallingThread
146            true,       // canCallJava XXX
147            PRIORITY_FOREGROUND);
148    if (name_is_type) {
149        mData->mCodec = android::MediaCodec::CreateByType(mData->mLooper, name, encoder);
150    } else {
151        mData->mCodec = android::MediaCodec::CreateByComponentName(mData->mLooper, name);
152    }
153    mData->mHandler = new CodecHandler(mData);
154    mData->mLooper->registerHandler(mData->mHandler);
155    mData->mGeneration = 1;
156    mData->mRequestedActivityNotification = false;
157    mData->mCallback = NULL;
158
159    return mData;
160}
161
162
163AMediaCodec* AMediaCodec_createCodecByName(const char *name) {
164    return createAMediaCodec(name, false, false);
165}
166
167AMediaCodec* AMediaCodec_createDecoderByType(const char *mime_type) {
168    return createAMediaCodec(mime_type, true, false);
169}
170
171AMediaCodec* AMediaCodec_createEncoderByType(const char *name) {
172    return createAMediaCodec(name, true, true);
173}
174
175int AMediaCodec_delete(AMediaCodec *mData) {
176    if (mData->mCodec != NULL) {
177        mData->mCodec->release();
178        mData->mCodec.clear();
179    }
180
181    if (mData->mLooper != NULL) {
182        mData->mLooper->unregisterHandler(mData->mHandler->id());
183        mData->mLooper->stop();
184        mData->mLooper.clear();
185    }
186    delete mData;
187    return OK;
188}
189
190int AMediaCodec_configure(
191        AMediaCodec *mData,
192        const AMediaFormat* format,
193        ANativeWindow* window,
194        AMediaCrypto *crypto,
195        uint32_t flags) {
196    sp<AMessage> nativeFormat;
197    AMediaFormat_getFormat(format, &nativeFormat);
198    ALOGV("configure with format: %s", nativeFormat->debugString(0).c_str());
199    sp<Surface> surface = NULL;
200    if (window != NULL) {
201        surface = (Surface*) window;
202    }
203
204    return translate_error(mData->mCodec->configure(nativeFormat, surface,
205            crypto ? crypto->mCrypto : NULL, flags));
206}
207
208int AMediaCodec_start(AMediaCodec *mData) {
209    status_t ret =  mData->mCodec->start();
210    if (ret != OK) {
211        return translate_error(ret);
212    }
213    mData->mActivityNotification = new AMessage(kWhatActivityNotify, mData->mHandler->id());
214    mData->mActivityNotification->setInt32("generation", mData->mGeneration);
215    requestActivityNotification(mData);
216    return OK;
217}
218
219int AMediaCodec_stop(AMediaCodec *mData) {
220    int ret = translate_error(mData->mCodec->stop());
221
222    sp<AMessage> msg = new AMessage(kWhatStopActivityNotifications, mData->mHandler->id());
223    sp<AMessage> response;
224    msg->postAndAwaitResponse(&response);
225    mData->mActivityNotification.clear();
226
227    return ret;
228}
229
230int AMediaCodec_flush(AMediaCodec *mData) {
231    return translate_error(mData->mCodec->flush());
232}
233
234ssize_t AMediaCodec_dequeueInputBuffer(AMediaCodec *mData, int64_t timeoutUs) {
235    size_t idx;
236    status_t ret = mData->mCodec->dequeueInputBuffer(&idx, timeoutUs);
237    requestActivityNotification(mData);
238    if (ret == OK) {
239        return idx;
240    }
241    return translate_error(ret);
242}
243
244uint8_t* AMediaCodec_getInputBuffer(AMediaCodec *mData, size_t idx, size_t *out_size) {
245    android::Vector<android::sp<android::ABuffer> > abufs;
246    if (mData->mCodec->getInputBuffers(&abufs) == 0) {
247        size_t n = abufs.size();
248        if (idx >= n) {
249            ALOGE("buffer index %d out of range", idx);
250            return NULL;
251        }
252        if (out_size != NULL) {
253            *out_size = abufs[idx]->capacity();
254        }
255        return abufs[idx]->data();
256    }
257    ALOGE("couldn't get input buffers");
258    return NULL;
259}
260
261uint8_t* AMediaCodec_getOutputBuffer(AMediaCodec *mData, size_t idx, size_t *out_size) {
262    android::Vector<android::sp<android::ABuffer> > abufs;
263    if (mData->mCodec->getOutputBuffers(&abufs) == 0) {
264        size_t n = abufs.size();
265        if (idx >= n) {
266            ALOGE("buffer index %d out of range", idx);
267            return NULL;
268        }
269        if (out_size != NULL) {
270            *out_size = abufs[idx]->capacity();
271        }
272        return abufs[idx]->data();
273    }
274    ALOGE("couldn't get output buffers");
275    return NULL;
276}
277
278int AMediaCodec_queueInputBuffer(AMediaCodec *mData,
279        size_t idx, off_t offset, size_t size, uint64_t time, uint32_t flags) {
280
281    AString errorMsg;
282    status_t ret = mData->mCodec->queueInputBuffer(idx, offset, size, time, flags, &errorMsg);
283    return translate_error(ret);
284}
285
286ssize_t AMediaCodec_dequeueOutputBuffer(AMediaCodec *mData,
287        AMediaCodecBufferInfo *info, int64_t timeoutUs) {
288    size_t idx;
289    size_t offset;
290    size_t size;
291    uint32_t flags;
292    int64_t presentationTimeUs;
293    status_t ret = mData->mCodec->dequeueOutputBuffer(&idx, &offset, &size, &presentationTimeUs,
294            &flags, timeoutUs);
295    requestActivityNotification(mData);
296    switch (ret) {
297        case OK:
298            info->offset = offset;
299            info->size = size;
300            info->flags = flags;
301            info->presentationTimeUs = presentationTimeUs;
302            return idx;
303        case -EAGAIN:
304            return AMEDIACODEC_INFO_TRY_AGAIN_LATER;
305        case android::INFO_FORMAT_CHANGED:
306            return AMEDIACODEC_INFO_OUTPUT_FORMAT_CHANGED;
307        case INFO_OUTPUT_BUFFERS_CHANGED:
308            return AMEDIACODEC_INFO_OUTPUT_BUFFERS_CHANGED;
309        default:
310            break;
311    }
312    return translate_error(ret);
313}
314
315AMediaFormat* AMediaCodec_getOutputFormat(AMediaCodec *mData) {
316    sp<AMessage> format;
317    mData->mCodec->getOutputFormat(&format);
318    return AMediaFormat_fromMsg(&format);
319}
320
321int AMediaCodec_releaseOutputBuffer(AMediaCodec *mData, size_t idx, bool render) {
322    if (render) {
323        return translate_error(mData->mCodec->renderOutputBufferAndRelease(idx));
324    } else {
325        return translate_error(mData->mCodec->releaseOutputBuffer(idx));
326    }
327}
328
329int AMediaCodec_setNotificationCallback(AMediaCodec *mData, OnCodecEvent callback, void *userdata) {
330    mData->mCallback = callback;
331    mData->mCallbackUserData = userdata;
332    return OK;
333}
334
335typedef struct AMediaCodecCryptoInfo {
336        int numsubsamples;
337        uint8_t key[16];
338        uint8_t iv[16];
339        uint32_t mode;
340        size_t *clearbytes;
341        size_t *encryptedbytes;
342} AMediaCodecCryptoInfo;
343
344int AMediaCodec_queueSecureInputBuffer(
345        AMediaCodec* codec,
346        size_t idx,
347        off_t offset,
348        AMediaCodecCryptoInfo* crypto,
349        uint64_t time,
350        uint32_t flags) {
351
352    CryptoPlugin::SubSample *subSamples = new CryptoPlugin::SubSample[crypto->numsubsamples];
353    for (int i = 0; i < crypto->numsubsamples; i++) {
354        subSamples[i].mNumBytesOfClearData = crypto->clearbytes[i];
355        subSamples[i].mNumBytesOfEncryptedData = crypto->encryptedbytes[i];
356    }
357
358    AString errormsg;
359    status_t err  = codec->mCodec->queueSecureInputBuffer(idx,
360            offset,
361            subSamples,
362            crypto->numsubsamples,
363            crypto->key,
364            crypto->iv,
365            (CryptoPlugin::Mode) crypto->mode,
366            time,
367            flags,
368            &errormsg);
369    if (err != 0) {
370        ALOGE("queSecureInputBuffer: %s", errormsg.c_str());
371    }
372    delete subSamples;
373    return translate_error(err);
374}
375
376
377
378AMediaCodecCryptoInfo *AMediaCodecCryptoInfo_new(
379        int numsubsamples,
380        uint8_t key[16],
381        uint8_t iv[16],
382        uint32_t mode,
383        size_t *clearbytes,
384        size_t *encryptedbytes) {
385
386    // size needed to store all the crypto data
387    size_t cryptosize = sizeof(AMediaCodecCryptoInfo) + sizeof(size_t) * numsubsamples * 2;
388    AMediaCodecCryptoInfo *ret = (AMediaCodecCryptoInfo*) malloc(cryptosize);
389    if (!ret) {
390        ALOGE("couldn't allocate %d bytes", cryptosize);
391        return NULL;
392    }
393    ret->numsubsamples = numsubsamples;
394    memcpy(ret->key, key, 16);
395    memcpy(ret->iv, iv, 16);
396    ret->mode = mode;
397
398    // clearbytes and encryptedbytes point at the actual data, which follows
399    ret->clearbytes = (size_t*) ((&ret->encryptedbytes) + sizeof(ret->encryptedbytes));
400    ret->encryptedbytes = (size_t*) (ret->clearbytes + (sizeof(size_t) * numsubsamples));
401
402    size_t *dst = ret->clearbytes;
403    memcpy(dst, clearbytes, numsubsamples * sizeof(size_t));
404    dst += numsubsamples * sizeof(size_t);
405    memcpy(dst, encryptedbytes, numsubsamples * sizeof(size_t));
406
407    return ret;
408}
409
410
411int AMediaCodecCryptoInfo_delete(AMediaCodecCryptoInfo* info) {
412    free(info);
413    return OK;
414}
415
416size_t AMediaCodecCryptoInfo_getNumSubSamples(AMediaCodecCryptoInfo* ci) {
417    return ci->numsubsamples;
418}
419
420int AMediaCodecCryptoInfo_getKey(AMediaCodecCryptoInfo* ci, uint8_t *dst) {
421    if (!dst || !ci) {
422        return AMEDIAERROR_UNSUPPORTED;
423    }
424    memcpy(dst, ci->key, 16);
425    return OK;
426}
427
428int AMediaCodecCryptoInfo_getIV(AMediaCodecCryptoInfo* ci, uint8_t *dst) {
429    if (!dst || !ci) {
430        return AMEDIAERROR_UNSUPPORTED;
431    }
432    memcpy(dst, ci->iv, 16);
433    return OK;
434}
435
436uint32_t AMediaCodecCryptoInfo_getMode(AMediaCodecCryptoInfo* ci) {
437    if (!ci) {
438        return AMEDIAERROR_UNSUPPORTED;
439    }
440    return ci->mode;
441}
442
443int AMediaCodecCryptoInfo_getClearBytes(AMediaCodecCryptoInfo* ci, size_t *dst) {
444    if (!dst || !ci) {
445        return AMEDIAERROR_UNSUPPORTED;
446    }
447    memcpy(dst, ci->clearbytes, sizeof(size_t) * ci->numsubsamples);
448    return OK;
449}
450
451int AMediaCodecCryptoInfo_getEncryptedBytes(AMediaCodecCryptoInfo* ci, size_t *dst) {
452    if (!dst || !ci) {
453        return AMEDIAERROR_UNSUPPORTED;
454    }
455    memcpy(dst, ci->encryptedbytes, sizeof(size_t) * ci->numsubsamples);
456    return OK;
457}
458
459} // extern "C"
460
461