android (14)

最新推荐文章于 2025-08-23 10:36:55 发布

原创最新推荐文章于 2025-08-23 10:36:55 发布 · 811 阅读

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#android #service #null #constructor #interface #string

android (14)

status_t OMXClient::connect() {
    sp<IServiceManager> sm = defaultServiceManager();
    sp<IBinder> binder = sm->getService(String16("media.player"));
    sp<IMediaPlayerService> service = interface_cast<IMediaPlayerService>(binder);

CHECK(service.get() != NULL);

mOMX = service->getOMX();
CHECK(mOMX.get() != NULL);

return OK;
}

问问服务，组件准备好了吗？没准备就赶紧

MediaRecorderClient::MediaRecorderClient(const sp<MediaPlayerService>& service, pid_t pid)
{
LOGV("Client constructor");
mPid = pid;

    char value[PROPERTY_VALUE_MAX];
    if (!property_get("media.stagefright.enable-record", value, NULL)
        || !strcmp(value, "1") || !strcasecmp(value, "true")) {
        mRecorder = new StagefrightRecorder;
    } else
#ifndef NO_OPENCORE
    {
        mRecorder = new PVMediaRecorder();
    }
#else
    {
        mRecorder = NULL;
    }
#endif

mMediaPlayerService = service;
}

MediaRecorderClient 选择是 PVMediaRecorder 还是 StagefrightRecorder

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

    sp<MediaSource> encoder = OMXCodec::Create(
            client.interface(), enc_meta,
            true /* createEncoder */, cameraSource);
    if (encoder == NULL) {

    故事大约发生在冬季 OMXClient 和OMXCodec 遇见了

    sp<MediaSource> OMXCodec::Create(
        const sp<IOMX> &omx,
        const sp<MetaData> &meta, bool createEncoder,
        const sp<MediaSource> &source,
        const char *matchComponentName,
        uint32_t flags)