NuPlayerDecoder.cpp revision 9e2b7918eb5621b24bd54c922f630da45339de77 
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::onConfigure(const sp<AMessage> &format) {
75    CHECK(mCodec == NULL);
76
77    ++mBufferGeneration;
78
79    AString mime;
80    CHECK(format->findString("mime", &mime));
81
82    sp<Surface> surface = NULL;
83    if (mNativeWindow != NULL) {
84        surface = mNativeWindow->getSurfaceTextureClient();
85    }
86
87    mComponentName = mime;
88    mComponentName.append(" decoder");
89    ALOGV("[%s] onConfigure (surface=%p)", mComponentName.c_str(), surface.get());
90
91    mCodec = MediaCodec::CreateByType(mCodecLooper, mime.c_str(), false /* encoder */);
92    int32_t secure = 0;
93    if (format->findInt32("secure", &secure) && secure != 0) {
94        if (mCodec != NULL) {
95            mCodec->getName(&mComponentName);
96            mComponentName.append(".secure");
97            mCodec->release();
98            ALOGI("[%s] creating", mComponentName.c_str());
99            mCodec = MediaCodec::CreateByComponentName(
100                    mCodecLooper, mComponentName.c_str());
101        }
102    }
103    if (mCodec == NULL) {
104        ALOGE("Failed to create %s%s decoder",
105                (secure ? "secure " : ""), mime.c_str());
106        handleError(UNKNOWN_ERROR);
107        return;
108    }
109
110    mCodec->getName(&mComponentName);
111
112    if (mNativeWindow != NULL) {
113        // disconnect from surface as MediaCodec will reconnect
114        CHECK_EQ((int)NO_ERROR,
115                native_window_api_disconnect(
116                        surface.get(),
117                        NATIVE_WINDOW_API_MEDIA));
118    }
119    status_t err = mCodec->configure(
120            format, surface, NULL /* crypto */, 0 /* flags */);
121    if (err != OK) {
122        ALOGE("Failed to configure %s decoder (err=%d)", mComponentName.c_str(), err);
123        handleError(err);
124        return;
125    }
126    // the following should work in configured state
127    CHECK_EQ((status_t)OK, mCodec->getOutputFormat(&mOutputFormat));
128    CHECK_EQ((status_t)OK, mCodec->getInputFormat(&mInputFormat));
129
130    err = mCodec->start();
131    if (err != OK) {
132        ALOGE("Failed to start %s decoder (err=%d)", mComponentName.c_str(), err);
133        handleError(err);
134        return;
135    }
136
137    // the following should work after start
138    CHECK_EQ((status_t)OK, mCodec->getInputBuffers(&mInputBuffers));
139    releaseAndResetMediaBuffers();
140    CHECK_EQ((status_t)OK, mCodec->getOutputBuffers(&mOutputBuffers));
141    ALOGV("[%s] got %zu input and %zu output buffers",
142            mComponentName.c_str(),
143            mInputBuffers.size(),
144            mOutputBuffers.size());
145
146    requestCodecNotification();
147    mPaused = false;
148}
149
150void NuPlayer::Decoder::releaseAndResetMediaBuffers() {
151    for (size_t i = 0; i < mMediaBuffers.size(); i++) {
152        if (mMediaBuffers[i] != NULL) {
153            mMediaBuffers[i]->release();
154            mMediaBuffers.editItemAt(i) = NULL;
155        }
156    }
157    mMediaBuffers.resize(mInputBuffers.size());
158    for (size_t i = 0; i < mMediaBuffers.size(); i++) {
159        mMediaBuffers.editItemAt(i) = NULL;
160    }
161    mInputBufferIsDequeued.clear();
162    mInputBufferIsDequeued.resize(mInputBuffers.size());
163    for (size_t i = 0; i < mInputBufferIsDequeued.size(); i++) {
164        mInputBufferIsDequeued.editItemAt(i) = false;
165    }
166}
167
168void NuPlayer::Decoder::requestCodecNotification() {
169    if (mCodec != NULL) {
170        sp<AMessage> reply = new AMessage(kWhatCodecNotify, id());
171        reply->setInt32("generation", mBufferGeneration);
172        mCodec->requestActivityNotification(reply);
173    }
174}
175
176bool NuPlayer::Decoder::isStaleReply(const sp<AMessage> &msg) {
177    int32_t generation;
178    CHECK(msg->findInt32("generation", &generation));
179    return generation != mBufferGeneration;
180}
181
182void NuPlayer::Decoder::init() {
183    mDecoderLooper->registerHandler(this);
184}
185
186void NuPlayer::Decoder::configure(const sp<AMessage> &format) {
187    sp<AMessage> msg = new AMessage(kWhatConfigure, id());
188    msg->setMessage("format", format);
189    msg->post();
190}
191
192status_t NuPlayer::Decoder::getInputBuffers(Vector<sp<ABuffer> > *buffers) const {
193    sp<AMessage> msg = new AMessage(kWhatGetInputBuffers, id());
194    msg->setPointer("buffers", buffers);
195
196    sp<AMessage> response;
197    return PostAndAwaitResponse(msg, &response);
198}
199
200void NuPlayer::Decoder::handleError(int32_t err)
201{
202    sp<AMessage> notify = mNotify->dup();
203    notify->setInt32("what", kWhatError);
204    notify->setInt32("err", err);
205    notify->post();
206}
207
208bool NuPlayer::Decoder::handleAnInputBuffer() {
209    size_t bufferIx = -1;
210    status_t res = mCodec->dequeueInputBuffer(&bufferIx);
211    ALOGV("[%s] dequeued input: %d",
212            mComponentName.c_str(), res == OK ? (int)bufferIx : res);
213    if (res != OK) {
214        if (res != -EAGAIN) {
215            handleError(res);
216        }
217        return false;
218    }
219
220    CHECK_LT(bufferIx, mInputBuffers.size());
221
222    if (mMediaBuffers[bufferIx] != NULL) {
223        mMediaBuffers[bufferIx]->release();
224        mMediaBuffers.editItemAt(bufferIx) = NULL;
225    }
226    mInputBufferIsDequeued.editItemAt(bufferIx) = true;
227
228    sp<AMessage> reply = new AMessage(kWhatInputBufferFilled, id());
229    reply->setSize("buffer-ix", bufferIx);
230    reply->setInt32("generation", mBufferGeneration);
231
232    sp<AMessage> notify = mNotify->dup();
233    notify->setInt32("what", kWhatFillThisBuffer);
234    notify->setBuffer("buffer", mInputBuffers[bufferIx]);
235    notify->setMessage("reply", reply);
236    notify->post();
237    return true;
238}
239
240void android::NuPlayer::Decoder::onInputBufferFilled(const sp<AMessage> &msg) {
241    size_t bufferIx;
242    CHECK(msg->findSize("buffer-ix", &bufferIx));
243    CHECK_LT(bufferIx, mInputBuffers.size());
244    sp<ABuffer> codecBuffer = mInputBuffers[bufferIx];
245
246    sp<ABuffer> buffer;
247    bool hasBuffer = msg->findBuffer("buffer", &buffer);
248
249    // handle widevine classic source - that fills an arbitrary input buffer
250    MediaBuffer *mediaBuffer = NULL;
251    if (hasBuffer && buffer->meta()->findPointer(
252            "mediaBuffer", (void **)&mediaBuffer)) {
253        if (mediaBuffer == NULL) {
254            // received no actual buffer
255            ALOGW("[%s] received null MediaBuffer %s",
256                    mComponentName.c_str(), msg->debugString().c_str());
257            buffer = NULL;
258        } else {
259            // likely filled another buffer than we requested: adjust buffer index
260            size_t ix;
261            for (ix = 0; ix < mInputBuffers.size(); ix++) {
262                const sp<ABuffer> &buf = mInputBuffers[ix];
263                if (buf->data() == mediaBuffer->data()) {
264                    // all input buffers are dequeued on start, hence the check
265                    CHECK(mInputBufferIsDequeued[ix]);
266                    ALOGV("[%s] received MediaBuffer for #%zu instead of #%zu",
267                            mComponentName.c_str(), ix, bufferIx);
268
269                    // TRICKY: need buffer for the metadata, so instead, set
270                    // codecBuffer to the same (though incorrect) buffer to
271                    // avoid a memcpy into the codecBuffer
272                    codecBuffer = buffer;
273                    codecBuffer->setRange(
274                            mediaBuffer->range_offset(),
275                            mediaBuffer->range_length());
276                    bufferIx = ix;
277                    break;
278                }
279            }
280            CHECK(ix < mInputBuffers.size());
281        }
282    }
283
284    mInputBufferIsDequeued.editItemAt(bufferIx) = false;
285
286    if (buffer == NULL /* includes !hasBuffer */) {
287        int32_t streamErr = ERROR_END_OF_STREAM;
288        CHECK(msg->findInt32("err", &streamErr) || !hasBuffer);
289
290        if (streamErr == OK) {
291            /* buffers are returned to hold on to */
292            return;
293        }
294
295        // attempt to queue EOS
296        status_t err = mCodec->queueInputBuffer(
297                bufferIx,
298                0,
299                0,
300                0,
301                MediaCodec::BUFFER_FLAG_EOS);
302        if (streamErr == ERROR_END_OF_STREAM && err != OK) {
303            streamErr = err;
304            // err will not be ERROR_END_OF_STREAM
305        }
306
307        if (streamErr != ERROR_END_OF_STREAM) {
308            handleError(streamErr);
309        }
310    } else {
311        int64_t timeUs = 0;
312        uint32_t flags = 0;
313        CHECK(buffer->meta()->findInt64("timeUs", &timeUs));
314
315        int32_t eos;
316        // we do not expect CODECCONFIG or SYNCFRAME for decoder
317        if (buffer->meta()->findInt32("eos", &eos) && eos) {
318            flags |= MediaCodec::BUFFER_FLAG_EOS;
319        }
320
321        // copy into codec buffer
322        if (buffer != codecBuffer) {
323            CHECK_LE(buffer->size(), codecBuffer->capacity());
324            codecBuffer->setRange(0, buffer->size());
325            memcpy(codecBuffer->data(), buffer->data(), buffer->size());
326        }
327
328        status_t err = mCodec->queueInputBuffer(
329                        bufferIx,
330                        codecBuffer->offset(),
331                        codecBuffer->size(),
332                        timeUs,
333                        flags);
334        if (err != OK) {
335            ALOGE("Failed to queue input buffer for %s (err=%d)",
336                    mComponentName.c_str(), err);
337            handleError(err);
338        }
339
340        if (mediaBuffer != NULL) {
341            CHECK(mMediaBuffers[bufferIx] == NULL);
342            mMediaBuffers.editItemAt(bufferIx) = mediaBuffer;
343        }
344    }
345}
346
347bool NuPlayer::Decoder::handleAnOutputBuffer() {
348    size_t bufferIx = -1;
349    size_t offset;
350    size_t size;
351    int64_t timeUs;
352    uint32_t flags;
353    status_t res = mCodec->dequeueOutputBuffer(
354            &bufferIx, &offset, &size, &timeUs, &flags);
355
356    if (res != OK) {
357        ALOGV("[%s] dequeued output: %d", mComponentName.c_str(), res);
358    } else {
359        ALOGV("[%s] dequeued output: %d (time=%lld flags=%" PRIu32 ")",
360                mComponentName.c_str(), (int)bufferIx, timeUs, flags);
361    }
362
363    if (res == INFO_OUTPUT_BUFFERS_CHANGED) {
364        res = mCodec->getOutputBuffers(&mOutputBuffers);
365        if (res != OK) {
366            ALOGE("Failed to get output buffers for %s after INFO event (err=%d)",
367                    mComponentName.c_str(), res);
368            handleError(res);
369            return false;
370        }
371        // NuPlayer ignores this
372        return true;
373    } else if (res == INFO_FORMAT_CHANGED) {
374        sp<AMessage> format = new AMessage();
375        res = mCodec->getOutputFormat(&format);
376        if (res != OK) {
377            ALOGE("Failed to get output format for %s after INFO event (err=%d)",
378                    mComponentName.c_str(), res);
379            handleError(res);
380            return false;
381        }
382
383        sp<AMessage> notify = mNotify->dup();
384        notify->setInt32("what", kWhatOutputFormatChanged);
385        notify->setMessage("format", format);
386        notify->post();
387        return true;
388    } else if (res == INFO_DISCONTINUITY) {
389        // nothing to do
390        return true;
391    } else if (res != OK) {
392        if (res != -EAGAIN) {
393            handleError(res);
394        }
395        return false;
396    }
397
398    CHECK_LT(bufferIx, mOutputBuffers.size());
399    sp<ABuffer> buffer = mOutputBuffers[bufferIx];
400    buffer->setRange(offset, size);
401    buffer->meta()->clear();
402    buffer->meta()->setInt64("timeUs", timeUs);
403    if (flags & MediaCodec::BUFFER_FLAG_EOS) {
404        buffer->meta()->setInt32("eos", true);
405    }
406    // we do not expect CODECCONFIG or SYNCFRAME for decoder
407
408    sp<AMessage> reply = new AMessage(kWhatRenderBuffer, id());
409    reply->setSize("buffer-ix", bufferIx);
410    reply->setInt32("generation", mBufferGeneration);
411
412    sp<AMessage> notify = mNotify->dup();
413    notify->setInt32("what", kWhatDrainThisBuffer);
414    notify->setBuffer("buffer", buffer);
415    notify->setMessage("reply", reply);
416    notify->post();
417
418    // FIXME: This should be handled after rendering is complete,
419    // but Renderer needs it now
420    if (flags & MediaCodec::BUFFER_FLAG_EOS) {
421        ALOGV("queueing eos [%s]", mComponentName.c_str());
422        sp<AMessage> notify = mNotify->dup();
423        notify->setInt32("what", kWhatEOS);
424        notify->setInt32("err", ERROR_END_OF_STREAM);
425        notify->post();
426    }
427    return true;
428}
429
430void NuPlayer::Decoder::onRenderBuffer(const sp<AMessage> &msg) {
431    status_t err;
432    int32_t render;
433    size_t bufferIx;
434    CHECK(msg->findSize("buffer-ix", &bufferIx));
435    if (msg->findInt32("render", &render) && render) {
436        err = mCodec->renderOutputBufferAndRelease(bufferIx);
437    } else {
438        err = mCodec->releaseOutputBuffer(bufferIx);
439    }
440    if (err != OK) {
441        ALOGE("failed to release output buffer for %s (err=%d)",
442                mComponentName.c_str(), err);
443        handleError(err);
444    }
445}
446
447void NuPlayer::Decoder::onFlush() {
448    status_t err = OK;
449    if (mCodec != NULL) {
450        err = mCodec->flush();
451        ++mBufferGeneration;
452    }
453
454    if (err != OK) {
455        ALOGE("failed to flush %s (err=%d)", mComponentName.c_str(), err);
456        handleError(err);
457        return;
458    }
459
460    releaseAndResetMediaBuffers();
461
462    sp<AMessage> notify = mNotify->dup();
463    notify->setInt32("what", kWhatFlushCompleted);
464    notify->post();
465    mPaused = true;
466}
467
468void NuPlayer::Decoder::onResume() {
469    mPaused = false;
470}
471
472void NuPlayer::Decoder::onShutdown() {
473    status_t err = OK;
474    if (mCodec != NULL) {
475        err = mCodec->release();
476        mCodec = NULL;
477        ++mBufferGeneration;
478
479        if (mNativeWindow != NULL) {
480            // reconnect to surface as MediaCodec disconnected from it
481            CHECK_EQ((int)NO_ERROR,
482                    native_window_api_connect(
483                            mNativeWindow->getNativeWindow().get(),
484                            NATIVE_WINDOW_API_MEDIA));
485        }
486        mComponentName = "decoder";
487    }
488
489    releaseAndResetMediaBuffers();
490
491    if (err != OK) {
492        ALOGE("failed to release %s (err=%d)", mComponentName.c_str(), err);
493        handleError(err);
494        return;
495    }
496
497    sp<AMessage> notify = mNotify->dup();
498    notify->setInt32("what", kWhatShutdownCompleted);
499    notify->post();
500    mPaused = true;
501}
502
503void NuPlayer::Decoder::onMessageReceived(const sp<AMessage> &msg) {
504    ALOGV("[%s] onMessage: %s", mComponentName.c_str(), msg->debugString().c_str());
505
506    switch (msg->what()) {
507        case kWhatConfigure:
508        {
509            sp<AMessage> format;
510            CHECK(msg->findMessage("format", &format));
511            onConfigure(format);
512            break;
513        }
514
515        case kWhatGetInputBuffers:
516        {
517            uint32_t replyID;
518            CHECK(msg->senderAwaitsResponse(&replyID));
519
520            Vector<sp<ABuffer> > *dstBuffers;
521            CHECK(msg->findPointer("buffers", (void **)&dstBuffers));
522
523            dstBuffers->clear();
524            for (size_t i = 0; i < mInputBuffers.size(); i++) {
525                dstBuffers->push(mInputBuffers[i]);
526            }
527
528            (new AMessage)->postReply(replyID);
529            break;
530        }
531
532        case kWhatCodecNotify:
533        {
534            if (!isStaleReply(msg)) {
535                if (!mPaused) {
536                    while (handleAnInputBuffer()) {
537                    }
538                }
539
540                while (handleAnOutputBuffer()) {
541                }
542            }
543
544            requestCodecNotification();
545            break;
546        }
547
548        case kWhatInputBufferFilled:
549        {
550            if (!isStaleReply(msg)) {
551                onInputBufferFilled(msg);
552            }
553            break;
554        }
555
556        case kWhatRenderBuffer:
557        {
558            if (!isStaleReply(msg)) {
559                onRenderBuffer(msg);
560            }
561            break;
562        }
563
564        case kWhatFlush:
565        {
566            onFlush();
567            break;
568        }
569
570        case kWhatResume:
571        {
572            onResume();
573            break;
574        }
575
576        case kWhatShutdown:
577        {
578            onShutdown();
579            break;
580        }
581
582        default:
583            TRESPASS();
584            break;
585    }
586}
587
588void NuPlayer::Decoder::signalFlush() {
589    (new AMessage(kWhatFlush, id()))->post();
590}
591
592void NuPlayer::Decoder::signalResume() {
593    (new AMessage(kWhatResume, id()))->post();
594}
595
596void NuPlayer::Decoder::initiateShutdown() {
597    (new AMessage(kWhatShutdown, id()))->post();
598}
599
600bool NuPlayer::Decoder::supportsSeamlessAudioFormatChange(const sp<AMessage> &targetFormat) const {
601    if (targetFormat == NULL) {
602        return true;
603    }
604
605    AString mime;
606    if (!targetFormat->findString("mime", &mime)) {
607        return false;
608    }
609
610    if (!strcasecmp(mime.c_str(), MEDIA_MIMETYPE_AUDIO_AAC)) {
611        // field-by-field comparison
612        const char * keys[] = { "channel-count", "sample-rate", "is-adts" };
613        for (unsigned int i = 0; i < sizeof(keys) / sizeof(keys[0]); i++) {
614            int32_t oldVal, newVal;
615            if (!mOutputFormat->findInt32(keys[i], &oldVal) ||
616                    !targetFormat->findInt32(keys[i], &newVal) ||
617                    oldVal != newVal) {
618                return false;
619            }
620        }
621
622        sp<ABuffer> oldBuf, newBuf;
623        if (mOutputFormat->findBuffer("csd-0", &oldBuf) &&
624                targetFormat->findBuffer("csd-0", &newBuf)) {
625            if (oldBuf->size() != newBuf->size()) {
626                return false;
627            }
628            return !memcmp(oldBuf->data(), newBuf->data(), oldBuf->size());
629        }
630    }
631    return false;
632}
633
634bool NuPlayer::Decoder::supportsSeamlessFormatChange(const sp<AMessage> &targetFormat) const {
635    if (mOutputFormat == NULL) {
636        return false;
637    }
638
639    if (targetFormat == NULL) {
640        return true;
641    }
642
643    AString oldMime, newMime;
644    if (!mOutputFormat->findString("mime", &oldMime)
645            || !targetFormat->findString("mime", &newMime)
646            || !(oldMime == newMime)) {
647        return false;
648    }
649
650    bool audio = !strncasecmp(oldMime.c_str(), "audio/", strlen("audio/"));
651    bool seamless;
652    if (audio) {
653        seamless = supportsSeamlessAudioFormatChange(targetFormat);
654    } else {
655        int32_t isAdaptive;
656        seamless = (mCodec != NULL &&
657                mInputFormat->findInt32("adaptive-playback", &isAdaptive) &&
658                isAdaptive);
659    }
660
661    ALOGV("%s seamless support for %s", seamless ? "yes" : "no", oldMime.c_str());
662    return seamless;
663}
664
665struct NuPlayer::CCDecoder::CCData {
666    CCData(uint8_t type, uint8_t data1, uint8_t data2)
667        : mType(type), mData1(data1), mData2(data2) {
668    }
669
670    uint8_t mType;
671    uint8_t mData1;
672    uint8_t mData2;
673};
674
675NuPlayer::CCDecoder::CCDecoder(const sp<AMessage> &notify)
676    : mNotify(notify),
677      mTrackCount(0),
678      mSelectedTrack(-1) {
679}
680
681size_t NuPlayer::CCDecoder::getTrackCount() const {
682    return mTrackCount;
683}
684
685sp<AMessage> NuPlayer::CCDecoder::getTrackInfo(size_t index) const {
686    CHECK(index == 0);
687
688    sp<AMessage> format = new AMessage();
689
690    format->setInt32("type", MEDIA_TRACK_TYPE_SUBTITLE);
691    format->setString("language", "und");
692    format->setString("mime", MEDIA_MIMETYPE_TEXT_CEA_608);
693    format->setInt32("auto", 1);
694    format->setInt32("default", 1);
695    format->setInt32("forced", 0);
696
697    return format;
698}
699
700status_t NuPlayer::CCDecoder::selectTrack(size_t index, bool select) {
701    CHECK(index < mTrackCount);
702
703    if (select) {
704        if (mSelectedTrack == (ssize_t)index) {
705            ALOGE("track %zu already selected", index);
706            return BAD_VALUE;
707        }
708        ALOGV("selected track %zu", index);
709        mSelectedTrack = index;
710    } else {
711        if (mSelectedTrack != (ssize_t)index) {
712            ALOGE("track %zu is not selected", index);
713            return BAD_VALUE;
714        }
715        ALOGV("unselected track %zu", index);
716        mSelectedTrack = -1;
717    }
718
719    return OK;
720}
721
722bool NuPlayer::CCDecoder::isSelected() const {
723    return mSelectedTrack >= 0 && mSelectedTrack < (int32_t)mTrackCount;
724}
725
726bool NuPlayer::CCDecoder::isNullPad(CCData *cc) const {
727    return cc->mData1 < 0x10 && cc->mData2 < 0x10;
728}
729
730void NuPlayer::CCDecoder::dumpBytePair(const sp<ABuffer> &ccBuf) const {
731    size_t offset = 0;
732    AString out;
733
734    while (offset < ccBuf->size()) {
735        char tmp[128];
736
737        CCData *cc = (CCData *) (ccBuf->data() + offset);
738
739        if (isNullPad(cc)) {
740            // 1 null pad or XDS metadata, ignore
741            offset += sizeof(CCData);
742            continue;
743        }
744
745        if (cc->mData1 >= 0x20 && cc->mData1 <= 0x7f) {
746            // 2 basic chars
747            sprintf(tmp, "[%d]Basic: %c %c", cc->mType, cc->mData1, cc->mData2);
748        } else if ((cc->mData1 == 0x11 || cc->mData1 == 0x19)
749                 && cc->mData2 >= 0x30 && cc->mData2 <= 0x3f) {
750            // 1 special char
751            sprintf(tmp, "[%d]Special: %02x %02x", cc->mType, cc->mData1, cc->mData2);
752        } else if ((cc->mData1 == 0x12 || cc->mData1 == 0x1A)
753                 && cc->mData2 >= 0x20 && cc->mData2 <= 0x3f){
754            // 1 Spanish/French char
755            sprintf(tmp, "[%d]Spanish: %02x %02x", cc->mType, cc->mData1, cc->mData2);
756        } else if ((cc->mData1 == 0x13 || cc->mData1 == 0x1B)
757                 && cc->mData2 >= 0x20 && cc->mData2 <= 0x3f){
758            // 1 Portuguese/German/Danish char
759            sprintf(tmp, "[%d]German: %02x %02x", cc->mType, cc->mData1, cc->mData2);
760        } else if ((cc->mData1 == 0x11 || cc->mData1 == 0x19)
761                 && cc->mData2 >= 0x20 && cc->mData2 <= 0x2f){
762            // Mid-Row Codes (Table 69)
763            sprintf(tmp, "[%d]Mid-row: %02x %02x", cc->mType, cc->mData1, cc->mData2);
764        } else if (((cc->mData1 == 0x14 || cc->mData1 == 0x1c)
765                  && cc->mData2 >= 0x20 && cc->mData2 <= 0x2f)
766                  ||
767                   ((cc->mData1 == 0x17 || cc->mData1 == 0x1f)
768                  && cc->mData2 >= 0x21 && cc->mData2 <= 0x23)){
769            // Misc Control Codes (Table 70)
770            sprintf(tmp, "[%d]Ctrl: %02x %02x", cc->mType, cc->mData1, cc->mData2);
771        } else if ((cc->mData1 & 0x70) == 0x10
772                && (cc->mData2 & 0x40) == 0x40
773                && ((cc->mData1 & 0x07) || !(cc->mData2 & 0x20)) ) {
774            // Preamble Address Codes (Table 71)
775            sprintf(tmp, "[%d]PAC: %02x %02x", cc->mType, cc->mData1, cc->mData2);
776        } else {
777            sprintf(tmp, "[%d]Invalid: %02x %02x", cc->mType, cc->mData1, cc->mData2);
778        }
779
780        if (out.size() > 0) {
781            out.append(", ");
782        }
783
784        out.append(tmp);
785
786        offset += sizeof(CCData);
787    }
788
789    ALOGI("%s", out.c_str());
790}
791
792bool NuPlayer::CCDecoder::extractFromSEI(const sp<ABuffer> &accessUnit) {
793    int64_t timeUs;
794    CHECK(accessUnit->meta()->findInt64("timeUs", &timeUs));
795
796    sp<ABuffer> sei;
797    if (!accessUnit->meta()->findBuffer("sei", &sei) || sei == NULL) {
798        return false;
799    }
800
801    bool hasCC = false;
802
803    NALBitReader br(sei->data() + 1, sei->size() - 1);
804    // sei_message()
805    while (br.atLeastNumBitsLeft(16)) { // at least 16-bit for sei_message()
806        uint32_t payload_type = 0;
807        size_t payload_size = 0;
808        uint8_t last_byte;
809
810        do {
811            last_byte = br.getBits(8);
812            payload_type += last_byte;
813        } while (last_byte == 0xFF);
814
815        do {
816            last_byte = br.getBits(8);
817            payload_size += last_byte;
818        } while (last_byte == 0xFF);
819
820        // sei_payload()
821        if (payload_type == 4) {
822            // user_data_registered_itu_t_t35()
823
824            // ATSC A/72: 6.4.2
825            uint8_t itu_t_t35_country_code = br.getBits(8);
826            uint16_t itu_t_t35_provider_code = br.getBits(16);
827            uint32_t user_identifier = br.getBits(32);
828            uint8_t user_data_type_code = br.getBits(8);
829
830            payload_size -= 1 + 2 + 4 + 1;
831
832            if (itu_t_t35_country_code == 0xB5
833                    && itu_t_t35_provider_code == 0x0031
834                    && user_identifier == 'GA94'
835                    && user_data_type_code == 0x3) {
836                hasCC = true;
837
838                // MPEG_cc_data()
839                // ATSC A/53 Part 4: 6.2.3.1
840                br.skipBits(1); //process_em_data_flag
841                bool process_cc_data_flag = br.getBits(1);
842                br.skipBits(1); //additional_data_flag
843                size_t cc_count = br.getBits(5);
844                br.skipBits(8); // em_data;
845                payload_size -= 2;
846
847                if (process_cc_data_flag) {
848                    AString out;
849
850                    sp<ABuffer> ccBuf = new ABuffer(cc_count * sizeof(CCData));
851                    ccBuf->setRange(0, 0);
852
853                    for (size_t i = 0; i < cc_count; i++) {
854                        uint8_t marker = br.getBits(5);
855                        CHECK_EQ(marker, 0x1f);
856
857                        bool cc_valid = br.getBits(1);
858                        uint8_t cc_type = br.getBits(2);
859                        // remove odd parity bit
860                        uint8_t cc_data_1 = br.getBits(8) & 0x7f;
861                        uint8_t cc_data_2 = br.getBits(8) & 0x7f;
862
863                        if (cc_valid
864                                && (cc_type == 0 || cc_type == 1)) {
865                            CCData cc(cc_type, cc_data_1, cc_data_2);
866                            if (!isNullPad(&cc)) {
867                                memcpy(ccBuf->data() + ccBuf->size(),
868                                        (void *)&cc, sizeof(cc));
869                                ccBuf->setRange(0, ccBuf->size() + sizeof(CCData));
870                            }
871                        }
872                    }
873                    payload_size -= cc_count * 3;
874
875                    mCCMap.add(timeUs, ccBuf);
876                    break;
877                }
878            } else {
879                ALOGV("Malformed SEI payload type 4");
880            }
881        } else {
882            ALOGV("Unsupported SEI payload type %d", payload_type);
883        }
884
885        // skipping remaining bits of this payload
886        br.skipBits(payload_size * 8);
887    }
888
889    return hasCC;
890}
891
892void NuPlayer::CCDecoder::decode(const sp<ABuffer> &accessUnit) {
893    if (extractFromSEI(accessUnit) && mTrackCount == 0) {
894        mTrackCount++;
895
896        ALOGI("Found CEA-608 track");
897        sp<AMessage> msg = mNotify->dup();
898        msg->setInt32("what", kWhatTrackAdded);
899        msg->post();
900    }
901    // TODO: extract CC from other sources
902}
903
904void NuPlayer::CCDecoder::display(int64_t timeUs) {
905    ssize_t index = mCCMap.indexOfKey(timeUs);
906    if (index < 0) {
907        ALOGV("cc for timestamp %" PRId64 " not found", timeUs);
908        return;
909    }
910
911    sp<ABuffer> &ccBuf = mCCMap.editValueAt(index);
912
913    if (ccBuf->size() > 0) {
914#if 0
915        dumpBytePair(ccBuf);
916#endif
917
918        ccBuf->meta()->setInt32("trackIndex", mSelectedTrack);
919        ccBuf->meta()->setInt64("timeUs", timeUs);
920        ccBuf->meta()->setInt64("durationUs", 0ll);
921
922        sp<AMessage> msg = mNotify->dup();
923        msg->setInt32("what", kWhatClosedCaptionData);
924        msg->setBuffer("buffer", ccBuf);
925        msg->post();
926    }
927
928    // remove all entries before timeUs
929    mCCMap.removeItemsAt(0, index + 1);
930}
931
932}  // namespace android
933
934