C++ AudioPlayer::start方法代码示例

int main(int argc, char **argv) {
    android::ProcessState::self()->startThreadPool();

    OMXClient client;
    CHECK_EQ(client.connect(), OK);

    const int32_t kSampleRate = 22050;
    const int32_t kNumChannels = 2;
    sp<MediaSource> audioSource = new SineSource(kSampleRate, kNumChannels);

#if 0
    sp<MediaPlayerBase::AudioSink> audioSink;
    AudioPlayer *player = new AudioPlayer(audioSink);
    player->setSource(audioSource);
    player->start();

    sleep(10);

    player->stop();
#endif

    sp<MetaData> encMeta = new MetaData;
    encMeta->setCString(kKeyMIMEType,
            1 ? MEDIA_MIMETYPE_AUDIO_AMR_WB : MEDIA_MIMETYPE_AUDIO_AAC);
    encMeta->setInt32(kKeySampleRate, kSampleRate);
    encMeta->setInt32(kKeyChannelCount, kNumChannels);
    encMeta->setInt32(kKeyMaxInputSize, 8192);

    sp<MediaSource> encoder =
        OMXCodec::Create(client.interface(), encMeta, true, audioSource);

    encoder->start();

    int32_t n = 0;
    status_t err;
    MediaBuffer *buffer;
    while ((err = encoder->read(&buffer)) == OK) {
        printf(".");
        fflush(stdout);

        buffer->release();
        buffer = NULL;

        if (++n == 100) {
            break;
        }
    }
    printf("$\n");

    encoder->stop();

    client.disconnect();

    return 0;
}

/**
Play a 44100Hz mono 16bit PCM sound
*/
void Audio::playMono16Sound(const QByteArray& data)
{
    QMutexLocker locker(&d->audioLock);

    if (!d->alOutDev)
        d->initOutput(Settings::getInstance().getOutDev());

    alSourcef(d->alMainSource, AL_GAIN, d->outputVolume);

    AudioPlayer *player = new AudioPlayer(d->alMainSource, data);
    connect(player, &AudioPlayer::finished, [=]() {
        QMutexLocker locker(&d->audioLock);

        if (d->outSources.isEmpty())
            d->cleanupOutput();
        else
            qDebug("Audio output not closed -> there are pending subscriptions.");
    });

    player->start();
}

int
CPlayerClient::foundMediaFile(const char *path, sp<IMediaExtractor>& pExtractor_in)
{
    AUTO_LOG();

    CHECK_PTR_EXT(path, BAD_VALUE);
    CHECK_PTR_EXT(pExtractor_in, BAD_VALUE);
    CHECK_PTR_EXT(m_pSink, BAD_VALUE);

    for (size_t i = 0; i < pExtractor_in->countTracks(); ++i) {
        sp<MetaData> meta = pExtractor_in->getTrackMetaData(i);
        CHECK_PTR_EXT(meta, BAD_VALUE);

        const char *_mime;
        CHECK(meta->findCString(kKeyMIMEType, &_mime));
        CHECK_PTR_EXT(_mime, BAD_VALUE);

        String8 mime = String8(_mime);

        if (!strncasecmp(mime.string(), "audio/", 6)) {
            AudioPlayer *player = new AudioPlayer(m_pSink);
            CHECK_PTR_EXT(player, BAD_VALUE);
                        
            player->setSource(pExtractor_in->getTrack(i));
            player->start(false /* sourceAlreadyStarted */);

            //status_t finalStatus;
            //while (!player->reachedEOS(&finalStatus)) {
            //    usleep(100000ll);
            //}

            delete player;
            player = NULL;            
        }
    }

    RETURN(OK);
}

static void playSource(OMXClient *client, sp<MediaSource> &source) {
    sp<MetaData> meta = source->getFormat();

    const char *mime;
    CHECK(meta->findCString(kKeyMIMEType, &mime));

    sp<MediaSource> rawSource;
    if (!strcasecmp(MEDIA_MIMETYPE_AUDIO_RAW, mime)) {
        rawSource = source;
    } else {
        int flags = 0;
        if (gPreferSoftwareCodec) {
            flags |= OMXCodec::kPreferSoftwareCodecs;
        }
        if (gForceToUseHardwareCodec) {
            CHECK(!gPreferSoftwareCodec);
            flags |= OMXCodec::kHardwareCodecsOnly;
        }
        rawSource = OMXCodec::Create(
            client->interface(), meta, false /* createEncoder */, source,
            NULL /* matchComponentName */,
            flags,
            gSurface);

        if (rawSource == NULL) {
            fprintf(stderr, "Failed to instantiate decoder for '%s'.\n", mime);
            return;
        }
        displayAVCProfileLevelIfPossible(meta);
    }

    source.clear();

    status_t err = rawSource->start();

    if (err != OK) {
        fprintf(stderr, "rawSource returned error %d (0x%08x)\n", err, err);
        return;
    }

    if (gPlaybackAudio) {
        AudioPlayer *player = new AudioPlayer(NULL);
        player->setSource(rawSource);
        rawSource.clear();

        player->start(true /* sourceAlreadyStarted */);

        status_t finalStatus;
        while (!player->reachedEOS(&finalStatus)) {
            usleep(100000ll);
        }

        delete player;
        player = NULL;

        return;
    } else if (gReproduceBug >= 3 && gReproduceBug <= 5) {
        int64_t durationUs;
        CHECK(meta->findInt64(kKeyDuration, &durationUs));

        status_t err;
        MediaBuffer *buffer;
        MediaSource::ReadOptions options;
        int64_t seekTimeUs = -1;
        for (;;) {
            err = rawSource->read(&buffer, &options);
            options.clearSeekTo();

            bool shouldSeek = false;
            if (err == INFO_FORMAT_CHANGED) {
                CHECK(buffer == NULL);

                printf("format changed.\n");
                continue;
            } else if (err != OK) {
                printf("reached EOF.\n");

                shouldSeek = true;
            } else {
                int64_t timestampUs;
                CHECK(buffer->meta_data()->findInt64(kKeyTime, &timestampUs));

                bool failed = false;

                if (seekTimeUs >= 0) {
                    int64_t diff = timestampUs - seekTimeUs;

                    if (diff < 0) {
                        diff = -diff;
                    }

                    if ((gReproduceBug == 4 && diff > 500000)
                        || (gReproduceBug == 5 && timestampUs < 0)) {
                        printf("wanted: %.2f secs, got: %.2f secs\n",
                               seekTimeUs / 1E6, timestampUs / 1E6);

                        printf("ERROR: ");
                        failed = true;
                    }
                }
//.........这里部分代码省略.........

int main() {
    // We only have an AMR-WB encoder on sholes...
    static bool outputWBAMR = false;
    static const int32_t kSampleRate = outputWBAMR ? 16000 : 8000;
    static const int32_t kNumChannels = 1;

    android::ProcessState::self()->startThreadPool();

    OMXClient client;
    CHECK_EQ(client.connect(), (status_t)OK);

#if 0
    sp<MediaSource> source = new SineSource(kSampleRate, kNumChannels);
#else
    sp<MediaSource> source = new AudioSource(
            AUDIO_SOURCE_DEFAULT,
            kSampleRate,
            audio_channel_in_mask_from_count(kNumChannels));
#endif

    sp<MetaData> meta = new MetaData;

    meta->setCString(
            kKeyMIMEType,
            outputWBAMR ? MEDIA_MIMETYPE_AUDIO_AMR_WB
                        : MEDIA_MIMETYPE_AUDIO_AMR_NB);

    meta->setInt32(kKeyChannelCount, kNumChannels);
    meta->setInt32(kKeySampleRate, kSampleRate);

    int32_t maxInputSize;
    if (source->getFormat()->findInt32(kKeyMaxInputSize, &maxInputSize)) {
        meta->setInt32(kKeyMaxInputSize, maxInputSize);
    }

    sp<MediaSource> encoder = OMXCodec::Create(
            client.interface(),
            meta, true /* createEncoder */,
            source);

#if 1
    sp<AMRWriter> writer = new AMRWriter("/sdcard/out.amr");
    writer->addSource(encoder);
    writer->start();
    sleep(10);
    writer->stop();
#else
    sp<MediaSource> decoder = OMXCodec::Create(
            client.interface(),
            meta, false /* createEncoder */,
            encoder);

#if 0
    AudioPlayer *player = new AudioPlayer(NULL);
    player->setSource(decoder);

    player->start();

    sleep(10);

    player->stop();

    delete player;
    player = NULL;
#elif 0
    CHECK_EQ(decoder->start(), (status_t)OK);

    MediaBuffer *buffer;
    while (decoder->read(&buffer) == OK) {
        // do something with buffer

        putchar('.');
        fflush(stdout);

        buffer->release();
        buffer = NULL;
    }

    CHECK_EQ(decoder->stop(), (status_t)OK);
#endif
#endif

    return 0;
}