eclair's camera HAL callback

 

camera will call the callback to let upper layer to deal with preview/still image/video image.

code:

CameraService::Client::dataCallback

switch (msgType) { case CAMERA_MSG_PREVIEW_FRAME: client->handlePreviewData(dataPtr); break; case CAMERA_MSG_POSTVIEW_FRAME: client->handlePostview(dataPtr); break; case CAMERA_MSG_RAW_IMAGE: client->handleRawPicture(dataPtr); break; case CAMERA_MSG_COMPRESSED_IMAGE: client->handleCompressedPicture(dataPtr); break; default: if (c != NULL) { c->dataCallback(msgType, dataPtr); } break; } 

the dataCallback use msgType to get the type of dataPtr.
this is differ from donut.

 

// picture callback - compressed picture readyvoid CameraService::Client::handleCompressedPicture(const sp<IMemory>& mem){#if DEBUG_DUMP_JPEG_SNAPSHOT_TO_FILE // for testing pursposes only { ssize_t offset; size_t size; sp<IMemoryHeap> heap = mem->getMemory(&offset, &size); dump_to_file("/data/photo.jpg", (uint8_t *)heap->base() + offset, size); }#endif sp<ICameraClient> c = mCameraClient; if (c != NULL) { c->dataCallback(CAMERA_MSG_COMPRESSED_IMAGE, mem); } mHardware->disableMsgType(CAMERA_MSG_COMPRESSED_IMAGE);} 

 

the c->dataCallback is filled by application.

private final class JpegPictureCallback implements PictureCallback { // do image storing and so on....}