NuPlayerDecoder.cpp revision 96e92b58b7e9647b4c7c2f54b62a1b357ab06b66 
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_NDEBUG 0
18#define LOG_TAG "NuPlayerDecoder"
19#include <utils/Log.h>
20#include <inttypes.h>
21
22#include "NuPlayerDecoder.h"
23
24#include <media/ICrypto.h>
25#include <media/stagefright/foundation/ABitReader.h>
26#include <media/stagefright/foundation/ABuffer.h>
27#include <media/stagefright/foundation/ADebug.h>
28#include <media/stagefright/foundation/AMessage.h>
29#include <media/stagefright/MediaBuffer.h>
30#include <media/stagefright/MediaCodec.h>
31#include <media/stagefright/MediaDefs.h>
32#include <media/stagefright/MediaErrors.h>
33
34namespace android {
35
36NuPlayer::Decoder::Decoder(
37        const sp<AMessage> &notify,
38        const sp<NativeWindowWrapper> &nativeWindow)
39    : mNotify(notify),
40      mNativeWindow(nativeWindow),
41      mBufferGeneration(0),
42      mPaused(true),
43      mComponentName("decoder") {
44    // Every decoder has its own looper because MediaCodec operations
45    // are blocking, but NuPlayer needs asynchronous operations.
46    mDecoderLooper = new ALooper;
47    mDecoderLooper->setName("NPDecoder");
48    mDecoderLooper->start(false, false, ANDROID_PRIORITY_AUDIO);
49
50    mCodecLooper = new ALooper;
51    mCodecLooper->setName("NPDecoder-CL");
52    mCodecLooper->start(false, false, ANDROID_PRIORITY_AUDIO);
53}
54
55NuPlayer::Decoder::~Decoder() {
56}
57
58static
59status_t PostAndAwaitResponse(
60        const sp<AMessage> &msg, sp<AMessage> *response) {
61    status_t err = msg->postAndAwaitResponse(response);
62
63    if (err != OK) {
64        return err;
65    }
66
67    if (!(*response)->findInt32("err", &err)) {
68        err = OK;
69    }
70
71    return err;
72}
73
74void NuPlayer::Decoder::rememberCodecSpecificData(const sp<AMessage> &format) {
75    mCSDsForCurrentFormat.clear();
76    for (int32_t i = 0; ; ++i) {
77        AString tag = "csd-";
78        tag.append(i);
79        sp<ABuffer> buffer;
80        if (!format->findBuffer(tag.c_str(), &buffer)) {
81            break;
82        }
83        mCSDsForCurrentFormat.push(buffer);
84    }
85}
86
87void NuPlayer::Decoder::onConfigure(const sp<AMessage> &format) {
88    CHECK(mCodec == NULL);
89
90    ++mBufferGeneration;
91
92    AString mime;
93    CHECK(format->findString("mime", &mime));
94
95    sp<Surface> surface = NULL;
96    if (mNativeWindow != NULL) {
97        surface = mNativeWindow->getSurfaceTextureClient();
98    }
99
100    mComponentName = mime;
101    mComponentName.append(" decoder");
102    ALOGV("[%s] onConfigure (surface=%p)", mComponentName.c_str(), surface.get());
103
104    mCodec = MediaCodec::CreateByType(mCodecLooper, mime.c_str(), false /* encoder */);
105    int32_t secure = 0;
106    if (format->findInt32("secure", &secure) && secure != 0) {
107        if (mCodec != NULL) {
108            mCodec->getName(&mComponentName);
109            mComponentName.append(".secure");
110            mCodec->release();
111            ALOGI("[%s] creating", mComponentName.c_str());
112            mCodec = MediaCodec::CreateByComponentName(
113                    mCodecLooper, mComponentName.c_str());
114        }
115    }
116    if (mCodec == NULL) {
117        ALOGE("Failed to create %s%s decoder",
118                (secure ? "secure " : ""), mime.c_str());
119        handleError(UNKNOWN_ERROR);
120        return;
121    }
122
123    mCodec->getName(&mComponentName);
124
125    status_t err;
126    if (mNativeWindow != NULL) {
127        // disconnect from surface as MediaCodec will reconnect
128        err = native_window_api_disconnect(
129                surface.get(), NATIVE_WINDOW_API_MEDIA);
130        // We treat this as a warning, as this is a preparatory step.
131        // Codec will try to connect to the surface, which is where
132        // any error signaling will occur.
133        ALOGW_IF(err != OK, "failed to disconnect from surface: %d", err);
134    }
135    err = mCodec->configure(
136            format, surface, NULL /* crypto */, 0 /* flags */);
137    if (err != OK) {
138        ALOGE("Failed to configure %s decoder (err=%d)", mComponentName.c_str(), err);
139        handleError(err);
140        return;
141    }
142    rememberCodecSpecificData(format);
143
144    // the following should work in configured state
145    CHECK_EQ((status_t)OK, mCodec->getOutputFormat(&mOutputFormat));
146    CHECK_EQ((status_t)OK, mCodec->getInputFormat(&mInputFormat));
147
148    err = mCodec->start();
149    if (err != OK) {
150        ALOGE("Failed to start %s decoder (err=%d)", mComponentName.c_str(), err);
151        handleError(err);
152        return;
153    }
154
155    // the following should work after start
156    CHECK_EQ((status_t)OK, mCodec->getInputBuffers(&mInputBuffers));
157    releaseAndResetMediaBuffers();
158    CHECK_EQ((status_t)OK, mCodec->getOutputBuffers(&mOutputBuffers));
159    ALOGV("[%s] got %zu input and %zu output buffers",
160            mComponentName.c_str(),
161            mInputBuffers.size(),
162            mOutputBuffers.size());
163
164    requestCodecNotification();
165    mPaused = false;
166}
167
168void NuPlayer::Decoder::releaseAndResetMediaBuffers() {
169    for (size_t i = 0; i < mMediaBuffers.size(); i++) {
170        if (mMediaBuffers[i] != NULL) {
171            mMediaBuffers[i]->release();
172            mMediaBuffers.editItemAt(i) = NULL;
173        }
174    }
175    mMediaBuffers.resize(mInputBuffers.size());
176    for (size_t i = 0; i < mMediaBuffers.size(); i++) {
177        mMediaBuffers.editItemAt(i) = NULL;
178    }
179    mInputBufferIsDequeued.clear();
180    mInputBufferIsDequeued.resize(mInputBuffers.size());
181    for (size_t i = 0; i < mInputBufferIsDequeued.size(); i++) {
182        mInputBufferIsDequeued.editItemAt(i) = false;
183    }
184}
185
186void NuPlayer::Decoder::requestCodecNotification() {
187    if (mCodec != NULL) {
188        sp<AMessage> reply = new AMessage(kWhatCodecNotify, id());
189        reply->setInt32("generation", mBufferGeneration);
190        mCodec->requestActivityNotification(reply);
191    }
192}
193
194bool NuPlayer::Decoder::isStaleReply(const sp<AMessage> &msg) {
195    int32_t generation;
196    CHECK(msg->findInt32("generation", &generation));
197    return generation != mBufferGeneration;
198}
199
200void NuPlayer::Decoder::init() {
201    mDecoderLooper->registerHandler(this);
202}
203
204void NuPlayer::Decoder::configure(const sp<AMessage> &format) {
205    sp<AMessage> msg = new AMessage(kWhatConfigure, id());
206    msg->setMessage("format", format);
207    msg->post();
208}
209
210void NuPlayer::Decoder::signalUpdateFormat(const sp<AMessage> &format) {
211    sp<AMessage> msg = new AMessage(kWhatUpdateFormat, id());
212    msg->setMessage("format", format);
213    msg->post();
214}
215
216status_t NuPlayer::Decoder::getInputBuffers(Vector<sp<ABuffer> > *buffers) const {
217    sp<AMessage> msg = new AMessage(kWhatGetInputBuffers, id());
218    msg->setPointer("buffers", buffers);
219
220    sp<AMessage> response;
221    return PostAndAwaitResponse(msg, &response);
222}
223
224void NuPlayer::Decoder::handleError(int32_t err)
225{
226    mCodec->release();
227
228    sp<AMessage> notify = mNotify->dup();
229    notify->setInt32("what", kWhatError);
230    notify->setInt32("err", err);
231    notify->post();
232}
233
234bool NuPlayer::Decoder::handleAnInputBuffer() {
235    size_t bufferIx = -1;
236    status_t res = mCodec->dequeueInputBuffer(&bufferIx);
237    ALOGV("[%s] dequeued input: %d",
238            mComponentName.c_str(), res == OK ? (int)bufferIx : res);
239    if (res != OK) {
240        if (res != -EAGAIN) {
241            handleError(res);
242        }
243        return false;
244    }
245
246    CHECK_LT(bufferIx, mInputBuffers.size());
247
248    if (mMediaBuffers[bufferIx] != NULL) {
249        mMediaBuffers[bufferIx]->release();
250        mMediaBuffers.editItemAt(bufferIx) = NULL;
251    }
252    mInputBufferIsDequeued.editItemAt(bufferIx) = true;
253
254    sp<AMessage> reply = new AMessage(kWhatInputBufferFilled, id());
255    reply->setSize("buffer-ix", bufferIx);
256    reply->setInt32("generation", mBufferGeneration);
257
258    if (!mCSDsToSubmit.isEmpty()) {
259        sp<ABuffer> buffer = mCSDsToSubmit.itemAt(0);
260        ALOGI("[%s] resubmitting CSD", mComponentName.c_str());
261        reply->setBuffer("buffer", buffer);
262        mCSDsToSubmit.removeAt(0);
263        reply->post();
264        return true;
265    }
266
267    sp<AMessage> notify = mNotify->dup();
268    notify->setInt32("what", kWhatFillThisBuffer);
269    notify->setBuffer("buffer", mInputBuffers[bufferIx]);
270    notify->setMessage("reply", reply);
271    notify->post();
272    return true;
273}
274
275void android::NuPlayer::Decoder::onInputBufferFilled(const sp<AMessage> &msg) {
276    size_t bufferIx;
277    CHECK(msg->findSize("buffer-ix", &bufferIx));
278    CHECK_LT(bufferIx, mInputBuffers.size());
279    sp<ABuffer> codecBuffer = mInputBuffers[bufferIx];
280
281    sp<ABuffer> buffer;
282    bool hasBuffer = msg->findBuffer("buffer", &buffer);
283
284    // handle widevine classic source - that fills an arbitrary input buffer
285    MediaBuffer *mediaBuffer = NULL;
286    if (hasBuffer) {
287        mediaBuffer = (MediaBuffer *)(buffer->getMediaBufferBase());
288        if (mediaBuffer != NULL) {
289            // likely filled another buffer than we requested: adjust buffer index
290            size_t ix;
291            for (ix = 0; ix < mInputBuffers.size(); ix++) {
292                const sp<ABuffer> &buf = mInputBuffers[ix];
293                if (buf->data() == mediaBuffer->data()) {
294                    // all input buffers are dequeued on start, hence the check
295                    CHECK(mInputBufferIsDequeued[ix]);
296                    ALOGV("[%s] received MediaBuffer for #%zu instead of #%zu",
297                            mComponentName.c_str(), ix, bufferIx);
298
299                    // TRICKY: need buffer for the metadata, so instead, set
300                    // codecBuffer to the same (though incorrect) buffer to
301                    // avoid a memcpy into the codecBuffer
302                    codecBuffer = buffer;
303                    codecBuffer->setRange(
304                            mediaBuffer->range_offset(),
305                            mediaBuffer->range_length());
306                    bufferIx = ix;
307                    break;
308                }
309            }
310            CHECK(ix < mInputBuffers.size());
311        }
312    }
313
314    mInputBufferIsDequeued.editItemAt(bufferIx) = false;
315
316    if (buffer == NULL /* includes !hasBuffer */) {
317        int32_t streamErr = ERROR_END_OF_STREAM;
318        CHECK(msg->findInt32("err", &streamErr) || !hasBuffer);
319
320        if (streamErr == OK) {
321            /* buffers are returned to hold on to */
322            return;
323        }
324
325        // attempt to queue EOS
326        status_t err = mCodec->queueInputBuffer(
327                bufferIx,
328                0,
329                0,
330                0,
331                MediaCodec::BUFFER_FLAG_EOS);
332        if (streamErr == ERROR_END_OF_STREAM && err != OK) {
333            streamErr = err;
334            // err will not be ERROR_END_OF_STREAM
335        }
336
337        if (streamErr != ERROR_END_OF_STREAM) {
338            handleError(streamErr);
339        }
340    } else {
341        int64_t timeUs = 0;
342        uint32_t flags = 0;
343        CHECK(buffer->meta()->findInt64("timeUs", &timeUs));
344
345        int32_t eos, csd;
346        // we do not expect SYNCFRAME for decoder
347        if (buffer->meta()->findInt32("eos", &eos) && eos) {
348            flags |= MediaCodec::BUFFER_FLAG_EOS;
349        } else if (buffer->meta()->findInt32("csd", &csd) && csd) {
350            flags |= MediaCodec::BUFFER_FLAG_CODECCONFIG;
351        }
352
353        // copy into codec buffer
354        if (buffer != codecBuffer) {
355            CHECK_LE(buffer->size(), codecBuffer->capacity());
356            codecBuffer->setRange(0, buffer->size());
357            memcpy(codecBuffer->data(), buffer->data(), buffer->size());
358        }
359
360        status_t err = mCodec->queueInputBuffer(
361                        bufferIx,
362                        codecBuffer->offset(),
363                        codecBuffer->size(),
364                        timeUs,
365                        flags);
366        if (err != OK) {
367            ALOGE("Failed to queue input buffer for %s (err=%d)",
368                    mComponentName.c_str(), err);
369            handleError(err);
370        }
371
372        if (mediaBuffer != NULL) {
373            CHECK(mMediaBuffers[bufferIx] == NULL);
374            mMediaBuffers.editItemAt(bufferIx) = mediaBuffer;
375        }
376    }
377}
378
379bool NuPlayer::Decoder::handleAnOutputBuffer() {
380    size_t bufferIx = -1;
381    size_t offset;
382    size_t size;
383    int64_t timeUs;
384    uint32_t flags;
385    status_t res = mCodec->dequeueOutputBuffer(
386            &bufferIx, &offset, &size, &timeUs, &flags);
387
388    if (res != OK) {
389        ALOGV("[%s] dequeued output: %d", mComponentName.c_str(), res);
390    } else {
391        ALOGV("[%s] dequeued output: %d (time=%lld flags=%" PRIu32 ")",
392                mComponentName.c_str(), (int)bufferIx, timeUs, flags);
393    }
394
395    if (res == INFO_OUTPUT_BUFFERS_CHANGED) {
396        res = mCodec->getOutputBuffers(&mOutputBuffers);
397        if (res != OK) {
398            ALOGE("Failed to get output buffers for %s after INFO event (err=%d)",
399                    mComponentName.c_str(), res);
400            handleError(res);
401            return false;
402        }
403        // NuPlayer ignores this
404        return true;
405    } else if (res == INFO_FORMAT_CHANGED) {
406        sp<AMessage> format = new AMessage();
407        res = mCodec->getOutputFormat(&format);
408        if (res != OK) {
409            ALOGE("Failed to get output format for %s after INFO event (err=%d)",
410                    mComponentName.c_str(), res);
411            handleError(res);
412            return false;
413        }
414
415        sp<AMessage> notify = mNotify->dup();
416        notify->setInt32("what", kWhatOutputFormatChanged);
417        notify->setMessage("format", format);
418        notify->post();
419        return true;
420    } else if (res == INFO_DISCONTINUITY) {
421        // nothing to do
422        return true;
423    } else if (res != OK) {
424        if (res != -EAGAIN) {
425            handleError(res);
426        }
427        return false;
428    }
429
430    CHECK_LT(bufferIx, mOutputBuffers.size());
431    sp<ABuffer> buffer = mOutputBuffers[bufferIx];
432    buffer->setRange(offset, size);
433    buffer->meta()->clear();
434    buffer->meta()->setInt64("timeUs", timeUs);
435    if (flags & MediaCodec::BUFFER_FLAG_EOS) {
436        buffer->meta()->setInt32("eos", true);
437    }
438    // we do not expect CODECCONFIG or SYNCFRAME for decoder
439
440    sp<AMessage> reply = new AMessage(kWhatRenderBuffer, id());
441    reply->setSize("buffer-ix", bufferIx);
442    reply->setInt32("generation", mBufferGeneration);
443
444    sp<AMessage> notify = mNotify->dup();
445    notify->setInt32("what", kWhatDrainThisBuffer);
446    notify->setBuffer("buffer", buffer);
447    notify->setMessage("reply", reply);
448    notify->post();
449
450    // FIXME: This should be handled after rendering is complete,
451    // but Renderer needs it now
452    if (flags & MediaCodec::BUFFER_FLAG_EOS) {
453        ALOGV("queueing eos [%s]", mComponentName.c_str());
454        sp<AMessage> notify = mNotify->dup();
455        notify->setInt32("what", kWhatEOS);
456        notify->setInt32("err", ERROR_END_OF_STREAM);
457        notify->post();
458    }
459    return true;
460}
461
462void NuPlayer::Decoder::onRenderBuffer(const sp<AMessage> &msg) {
463    status_t err;
464    int32_t render;
465    size_t bufferIx;
466    CHECK(msg->findSize("buffer-ix", &bufferIx));
467    if (msg->findInt32("render", &render) && render) {
468        err = mCodec->renderOutputBufferAndRelease(bufferIx);
469    } else {
470        err = mCodec->releaseOutputBuffer(bufferIx);
471    }
472    if (err != OK) {
473        ALOGE("failed to release output buffer for %s (err=%d)",
474                mComponentName.c_str(), err);
475        handleError(err);
476    }
477}
478
479void NuPlayer::Decoder::onFlush() {
480    status_t err = OK;
481    if (mCodec != NULL) {
482        err = mCodec->flush();
483        mCSDsToSubmit = mCSDsForCurrentFormat; // copy operator
484        ++mBufferGeneration;
485    }
486
487    if (err != OK) {
488        ALOGE("failed to flush %s (err=%d)", mComponentName.c_str(), err);
489        handleError(err);
490        return;
491    }
492
493    releaseAndResetMediaBuffers();
494
495    sp<AMessage> notify = mNotify->dup();
496    notify->setInt32("what", kWhatFlushCompleted);
497    notify->post();
498    mPaused = true;
499}
500
501void NuPlayer::Decoder::onResume() {
502    mPaused = false;
503}
504
505void NuPlayer::Decoder::onShutdown() {
506    status_t err = OK;
507    if (mCodec != NULL) {
508        err = mCodec->release();
509        mCodec = NULL;
510        ++mBufferGeneration;
511
512        if (mNativeWindow != NULL) {
513            // reconnect to surface as MediaCodec disconnected from it
514            status_t error =
515                    native_window_api_connect(
516                            mNativeWindow->getNativeWindow().get(),
517                            NATIVE_WINDOW_API_MEDIA);
518            ALOGW_IF(error != NO_ERROR,
519                    "[%s] failed to connect to native window, error=%d",
520                    mComponentName.c_str(), error);
521        }
522        mComponentName = "decoder";
523    }
524
525    releaseAndResetMediaBuffers();
526
527    if (err != OK) {
528        ALOGE("failed to release %s (err=%d)", mComponentName.c_str(), err);
529        handleError(err);
530        return;
531    }
532
533    sp<AMessage> notify = mNotify->dup();
534    notify->setInt32("what", kWhatShutdownCompleted);
535    notify->post();
536    mPaused = true;
537}
538
539void NuPlayer::Decoder::onMessageReceived(const sp<AMessage> &msg) {
540    ALOGV("[%s] onMessage: %s", mComponentName.c_str(), msg->debugString().c_str());
541
542    switch (msg->what()) {
543        case kWhatConfigure:
544        {
545            sp<AMessage> format;
546            CHECK(msg->findMessage("format", &format));
547            onConfigure(format);
548            break;
549        }
550
551        case kWhatUpdateFormat:
552        {
553            sp<AMessage> format;
554            CHECK(msg->findMessage("format", &format));
555            rememberCodecSpecificData(format);
556            break;
557        }
558
559        case kWhatGetInputBuffers:
560        {
561            uint32_t replyID;
562            CHECK(msg->senderAwaitsResponse(&replyID));
563
564            Vector<sp<ABuffer> > *dstBuffers;
565            CHECK(msg->findPointer("buffers", (void **)&dstBuffers));
566
567            dstBuffers->clear();
568            for (size_t i = 0; i < mInputBuffers.size(); i++) {
569                dstBuffers->push(mInputBuffers[i]);
570            }
571
572            (new AMessage)->postReply(replyID);
573            break;
574        }
575
576        case kWhatCodecNotify:
577        {
578            if (!isStaleReply(msg)) {
579                if (!mPaused) {
580                    while (handleAnInputBuffer()) {
581                    }
582                }
583
584                while (handleAnOutputBuffer()) {
585                }
586            }
587
588            requestCodecNotification();
589            break;
590        }
591
592        case kWhatInputBufferFilled:
593        {
594            if (!isStaleReply(msg)) {
595                onInputBufferFilled(msg);
596            }
597
598            break;
599        }
600
601        case kWhatRenderBuffer:
602        {
603            if (!isStaleReply(msg)) {
604                onRenderBuffer(msg);
605            }
606            break;
607        }
608
609        case kWhatFlush:
610        {
611            sp<AMessage> format;
612            if (msg->findMessage("new-format", &format)) {
613                rememberCodecSpecificData(format);
614            }
615            onFlush();
616            break;
617        }
618
619        case kWhatResume:
620        {
621            onResume();
622            break;
623        }
624
625        case kWhatShutdown:
626        {
627            onShutdown();
628            break;
629        }
630
631        default:
632            TRESPASS();
633            break;
634    }
635}
636
637void NuPlayer::Decoder::signalFlush(const sp<AMessage> &format) {
638    sp<AMessage> msg = new AMessage(kWhatFlush, id());
639    if (format != NULL) {
640        msg->setMessage("new-format", format);
641    }
642    msg->post();
643}
644
645void NuPlayer::Decoder::signalResume() {
646    (new AMessage(kWhatResume, id()))->post();
647}
648
649void NuPlayer::Decoder::initiateShutdown() {
650    (new AMessage(kWhatShutdown, id()))->post();
651}
652
653bool NuPlayer::Decoder::supportsSeamlessAudioFormatChange(const sp<AMessage> &targetFormat) const {
654    if (targetFormat == NULL) {
655        return true;
656    }
657
658    AString mime;
659    if (!targetFormat->findString("mime", &mime)) {
660        return false;
661    }
662
663    if (!strcasecmp(mime.c_str(), MEDIA_MIMETYPE_AUDIO_AAC)) {
664        // field-by-field comparison
665        const char * keys[] = { "channel-count", "sample-rate", "is-adts" };
666        for (unsigned int i = 0; i < sizeof(keys) / sizeof(keys[0]); i++) {
667            int32_t oldVal, newVal;
668            if (!mOutputFormat->findInt32(keys[i], &oldVal) ||
669                    !targetFormat->findInt32(keys[i], &newVal) ||
670                    oldVal != newVal) {
671                return false;
672            }
673        }
674
675        sp<ABuffer> oldBuf, newBuf;
676        if (mOutputFormat->findBuffer("csd-0", &oldBuf) &&
677                targetFormat->findBuffer("csd-0", &newBuf)) {
678            if (oldBuf->size() != newBuf->size()) {
679                return false;
680            }
681            return !memcmp(oldBuf->data(), newBuf->data(), oldBuf->size());
682        }
683    }
684    return false;
685}
686
687bool NuPlayer::Decoder::supportsSeamlessFormatChange(const sp<AMessage> &targetFormat) const {
688    if (mOutputFormat == NULL) {
689        return false;
690    }
691
692    if (targetFormat == NULL) {
693        return true;
694    }
695
696    AString oldMime, newMime;
697    if (!mOutputFormat->findString("mime", &oldMime)
698            || !targetFormat->findString("mime", &newMime)
699            || !(oldMime == newMime)) {
700        return false;
701    }
702
703    bool audio = !strncasecmp(oldMime.c_str(), "audio/", strlen("audio/"));
704    bool seamless;
705    if (audio) {
706        seamless = supportsSeamlessAudioFormatChange(targetFormat);
707    } else {
708        int32_t isAdaptive;
709        seamless = (mCodec != NULL &&
710                mInputFormat->findInt32("adaptive-playback", &isAdaptive) &&
711                isAdaptive);
712    }
713
714    ALOGV("%s seamless support for %s", seamless ? "yes" : "no", oldMime.c_str());
715    return seamless;
716}
717
718struct CCData {
719    CCData(uint8_t type, uint8_t data1, uint8_t data2)
720        : mType(type), mData1(data1), mData2(data2) {
721    }
722    bool getChannel(size_t *channel) const {
723        if (mData1 >= 0x10 && mData1 <= 0x1f) {
724            *channel = (mData1 >= 0x18 ? 1 : 0) + (mType ? 2 : 0);
725            return true;
726        }
727        return false;
728    }
729
730    uint8_t mType;
731    uint8_t mData1;
732    uint8_t mData2;
733};
734
735static bool isNullPad(CCData *cc) {
736    return cc->mData1 < 0x10 && cc->mData2 < 0x10;
737}
738
739static void dumpBytePair(const sp<ABuffer> &ccBuf) {
740    size_t offset = 0;
741    AString out;
742
743    while (offset < ccBuf->size()) {
744        char tmp[128];
745
746        CCData *cc = (CCData *) (ccBuf->data() + offset);
747
748        if (isNullPad(cc)) {
749            // 1 null pad or XDS metadata, ignore
750            offset += sizeof(CCData);
751            continue;
752        }
753
754        if (cc->mData1 >= 0x20 && cc->mData1 <= 0x7f) {
755            // 2 basic chars
756            sprintf(tmp, "[%d]Basic: %c %c", cc->mType, cc->mData1, cc->mData2);
757        } else if ((cc->mData1 == 0x11 || cc->mData1 == 0x19)
758                 && cc->mData2 >= 0x30 && cc->mData2 <= 0x3f) {
759            // 1 special char
760            sprintf(tmp, "[%d]Special: %02x %02x", cc->mType, cc->mData1, cc->mData2);
761        } else if ((cc->mData1 == 0x12 || cc->mData1 == 0x1A)
762                 && cc->mData2 >= 0x20 && cc->mData2 <= 0x3f){
763            // 1 Spanish/French char
764            sprintf(tmp, "[%d]Spanish: %02x %02x", cc->mType, cc->mData1, cc->mData2);
765        } else if ((cc->mData1 == 0x13 || cc->mData1 == 0x1B)
766                 && cc->mData2 >= 0x20 && cc->mData2 <= 0x3f){
767            // 1 Portuguese/German/Danish char
768            sprintf(tmp, "[%d]German: %02x %02x", cc->mType, cc->mData1, cc->mData2);
769        } else if ((cc->mData1 == 0x11 || cc->mData1 == 0x19)
770                 && cc->mData2 >= 0x20 && cc->mData2 <= 0x2f){
771            // Mid-Row Codes (Table 69)
772            sprintf(tmp, "[%d]Mid-row: %02x %02x", cc->mType, cc->mData1, cc->mData2);
773        } else if (((cc->mData1 == 0x14 || cc->mData1 == 0x1c)
774                  && cc->mData2 >= 0x20 && cc->mData2 <= 0x2f)
775                  ||
776                   ((cc->mData1 == 0x17 || cc->mData1 == 0x1f)
777                  && cc->mData2 >= 0x21 && cc->mData2 <= 0x23)){
778            // Misc Control Codes (Table 70)
779            sprintf(tmp, "[%d]Ctrl: %02x %02x", cc->mType, cc->mData1, cc->mData2);
780        } else if ((cc->mData1 & 0x70) == 0x10
781                && (cc->mData2 & 0x40) == 0x40
782                && ((cc->mData1 & 0x07) || !(cc->mData2 & 0x20)) ) {
783            // Preamble Address Codes (Table 71)
784            sprintf(tmp, "[%d]PAC: %02x %02x", cc->mType, cc->mData1, cc->mData2);
785        } else {
786            sprintf(tmp, "[%d]Invalid: %02x %02x", cc->mType, cc->mData1, cc->mData2);
787        }
788
789        if (out.size() > 0) {
790            out.append(", ");
791        }
792
793        out.append(tmp);
794
795        offset += sizeof(CCData);
796    }
797
798    ALOGI("%s", out.c_str());
799}
800
801NuPlayer::CCDecoder::CCDecoder(const sp<AMessage> &notify)
802    : mNotify(notify),
803      mCurrentChannel(0),
804      mSelectedTrack(-1) {
805      for (size_t i = 0; i < sizeof(mTrackIndices)/sizeof(mTrackIndices[0]); ++i) {
806          mTrackIndices[i] = -1;
807      }
808}
809
810size_t NuPlayer::CCDecoder::getTrackCount() const {
811    return mFoundChannels.size();
812}
813
814sp<AMessage> NuPlayer::CCDecoder::getTrackInfo(size_t index) const {
815    if (!isTrackValid(index)) {
816        return NULL;
817    }
818
819    sp<AMessage> format = new AMessage();
820
821    format->setInt32("type", MEDIA_TRACK_TYPE_SUBTITLE);
822    format->setString("language", "und");
823    format->setString("mime", MEDIA_MIMETYPE_TEXT_CEA_608);
824    //CC1, field 0 channel 0
825    bool isDefaultAuto = (mFoundChannels[index] == 0);
826    format->setInt32("auto", isDefaultAuto);
827    format->setInt32("default", isDefaultAuto);
828    format->setInt32("forced", 0);
829
830    return format;
831}
832
833status_t NuPlayer::CCDecoder::selectTrack(size_t index, bool select) {
834    if (!isTrackValid(index)) {
835        return BAD_VALUE;
836    }
837
838    if (select) {
839        if (mSelectedTrack == (ssize_t)index) {
840            ALOGE("track %zu already selected", index);
841            return BAD_VALUE;
842        }
843        ALOGV("selected track %zu", index);
844        mSelectedTrack = index;
845    } else {
846        if (mSelectedTrack != (ssize_t)index) {
847            ALOGE("track %zu is not selected", index);
848            return BAD_VALUE;
849        }
850        ALOGV("unselected track %zu", index);
851        mSelectedTrack = -1;
852    }
853
854    return OK;
855}
856
857bool NuPlayer::CCDecoder::isSelected() const {
858    return mSelectedTrack >= 0 && mSelectedTrack < (int32_t) getTrackCount();
859}
860
861bool NuPlayer::CCDecoder::isTrackValid(size_t index) const {
862    return index < getTrackCount();
863}
864
865int32_t NuPlayer::CCDecoder::getTrackIndex(size_t channel) const {
866    if (channel < sizeof(mTrackIndices)/sizeof(mTrackIndices[0])) {
867        return mTrackIndices[channel];
868    }
869    return -1;
870}
871
872// returns true if a new CC track is found
873bool NuPlayer::CCDecoder::extractFromSEI(const sp<ABuffer> &accessUnit) {
874    int64_t timeUs;
875    CHECK(accessUnit->meta()->findInt64("timeUs", &timeUs));
876
877    sp<ABuffer> sei;
878    if (!accessUnit->meta()->findBuffer("sei", &sei) || sei == NULL) {
879        return false;
880    }
881
882    bool trackAdded = false;
883
884    NALBitReader br(sei->data() + 1, sei->size() - 1);
885    // sei_message()
886    while (br.atLeastNumBitsLeft(16)) { // at least 16-bit for sei_message()
887        uint32_t payload_type = 0;
888        size_t payload_size = 0;
889        uint8_t last_byte;
890
891        do {
892            last_byte = br.getBits(8);
893            payload_type += last_byte;
894        } while (last_byte == 0xFF);
895
896        do {
897            last_byte = br.getBits(8);
898            payload_size += last_byte;
899        } while (last_byte == 0xFF);
900
901        // sei_payload()
902        if (payload_type == 4) {
903            // user_data_registered_itu_t_t35()
904
905            // ATSC A/72: 6.4.2
906            uint8_t itu_t_t35_country_code = br.getBits(8);
907            uint16_t itu_t_t35_provider_code = br.getBits(16);
908            uint32_t user_identifier = br.getBits(32);
909            uint8_t user_data_type_code = br.getBits(8);
910
911            payload_size -= 1 + 2 + 4 + 1;
912
913            if (itu_t_t35_country_code == 0xB5
914                    && itu_t_t35_provider_code == 0x0031
915                    && user_identifier == 'GA94'
916                    && user_data_type_code == 0x3) {
917                // MPEG_cc_data()
918                // ATSC A/53 Part 4: 6.2.3.1
919                br.skipBits(1); //process_em_data_flag
920                bool process_cc_data_flag = br.getBits(1);
921                br.skipBits(1); //additional_data_flag
922                size_t cc_count = br.getBits(5);
923                br.skipBits(8); // em_data;
924                payload_size -= 2;
925
926                if (process_cc_data_flag) {
927                    AString out;
928
929                    sp<ABuffer> ccBuf = new ABuffer(cc_count * sizeof(CCData));
930                    ccBuf->setRange(0, 0);
931
932                    for (size_t i = 0; i < cc_count; i++) {
933                        uint8_t marker = br.getBits(5);
934                        CHECK_EQ(marker, 0x1f);
935
936                        bool cc_valid = br.getBits(1);
937                        uint8_t cc_type = br.getBits(2);
938                        // remove odd parity bit
939                        uint8_t cc_data_1 = br.getBits(8) & 0x7f;
940                        uint8_t cc_data_2 = br.getBits(8) & 0x7f;
941
942                        if (cc_valid
943                                && (cc_type == 0 || cc_type == 1)) {
944                            CCData cc(cc_type, cc_data_1, cc_data_2);
945                            if (!isNullPad(&cc)) {
946                                size_t channel;
947                                if (cc.getChannel(&channel) && getTrackIndex(channel) < 0) {
948                                    mTrackIndices[channel] = mFoundChannels.size();
949                                    mFoundChannels.push_back(channel);
950                                    trackAdded = true;
951                                }
952                                memcpy(ccBuf->data() + ccBuf->size(),
953                                        (void *)&cc, sizeof(cc));
954                                ccBuf->setRange(0, ccBuf->size() + sizeof(CCData));
955                            }
956                        }
957                    }
958                    payload_size -= cc_count * 3;
959
960                    mCCMap.add(timeUs, ccBuf);
961                    break;
962                }
963            } else {
964                ALOGV("Malformed SEI payload type 4");
965            }
966        } else {
967            ALOGV("Unsupported SEI payload type %d", payload_type);
968        }
969
970        // skipping remaining bits of this payload
971        br.skipBits(payload_size * 8);
972    }
973
974    return trackAdded;
975}
976
977sp<ABuffer> NuPlayer::CCDecoder::filterCCBuf(
978        const sp<ABuffer> &ccBuf, size_t index) {
979    sp<ABuffer> filteredCCBuf = new ABuffer(ccBuf->size());
980    filteredCCBuf->setRange(0, 0);
981
982    size_t cc_count = ccBuf->size() / sizeof(CCData);
983    const CCData* cc_data = (const CCData*)ccBuf->data();
984    for (size_t i = 0; i < cc_count; ++i) {
985        size_t channel;
986        if (cc_data[i].getChannel(&channel)) {
987            mCurrentChannel = channel;
988        }
989        if (mCurrentChannel == mFoundChannels[index]) {
990            memcpy(filteredCCBuf->data() + filteredCCBuf->size(),
991                    (void *)&cc_data[i], sizeof(CCData));
992            filteredCCBuf->setRange(0, filteredCCBuf->size() + sizeof(CCData));
993        }
994    }
995
996    return filteredCCBuf;
997}
998
999void NuPlayer::CCDecoder::decode(const sp<ABuffer> &accessUnit) {
1000    if (extractFromSEI(accessUnit)) {
1001        ALOGI("Found CEA-608 track");
1002        sp<AMessage> msg = mNotify->dup();
1003        msg->setInt32("what", kWhatTrackAdded);
1004        msg->post();
1005    }
1006    // TODO: extract CC from other sources
1007}
1008
1009void NuPlayer::CCDecoder::display(int64_t timeUs) {
1010    if (!isTrackValid(mSelectedTrack)) {
1011        ALOGE("Could not find current track(index=%d)", mSelectedTrack);
1012        return;
1013    }
1014
1015    ssize_t index = mCCMap.indexOfKey(timeUs);
1016    if (index < 0) {
1017        ALOGV("cc for timestamp %" PRId64 " not found", timeUs);
1018        return;
1019    }
1020
1021    sp<ABuffer> ccBuf = filterCCBuf(mCCMap.valueAt(index), mSelectedTrack);
1022
1023    if (ccBuf->size() > 0) {
1024#if 0
1025        dumpBytePair(ccBuf);
1026#endif
1027
1028        ccBuf->meta()->setInt32("trackIndex", mSelectedTrack);
1029        ccBuf->meta()->setInt64("timeUs", timeUs);
1030        ccBuf->meta()->setInt64("durationUs", 0ll);
1031
1032        sp<AMessage> msg = mNotify->dup();
1033        msg->setInt32("what", kWhatClosedCaptionData);
1034        msg->setBuffer("buffer", ccBuf);
1035        msg->post();
1036    }
1037
1038    // remove all entries before timeUs
1039    mCCMap.removeItemsAt(0, index + 1);
1040}
1041
1042void NuPlayer::CCDecoder::flush() {
1043    mCCMap.clear();
1044}
1045
1046}  // namespace android
1047
1048