Preview no image

[eson-yunfei]

this is log:

2019-05-30 10:50:45.425 8973-8989/com.serenegiant.usbcameratest0 I/MainActivity: supportedSize:{"formats":[{"index":1,"type":6,"default":1,"size":["1920x1080","160x120","320x240","352x288","640x480","800x600","1024x768","1280x720","1280x1024","1600x1200","1920x1080"]},{"index":2,"type":4,"default":1,"size":["640x480","1920x1080","1280x720","800x600","960x540"]}]} 2019-05-30 10:50:45.425 8973-8989/com.serenegiant.usbcameratest0 D/Surface: Surface::setBuffersUserDimensions(this=0x94b15830,w=640,h=480) 2019-05-30 10:50:45.425 8973-8989/com.serenegiant.usbcameratest0 E/libUVCCamera: [8989UVCPreview.cpp:330:startPreview]:UVCPreview::startPreview() ========= 2019-05-30 10:50:45.426 8973-9006/com.serenegiant.usbcameratest0 E/libUVCCamera: [9006UVCPreview.cpp:474:preview_thread_func]:UVCPreview::preview_thread_func() ========= 2019-05-30 10:50:45.441 8973-9006/com.serenegiant.usbcameratest0 I/libUVCCamera: [9006UVCPreview.cpp:507:prepare_preview]:frameSize=(640,480)@MJPEG 2019-05-30 10:50:45.441 8973-9006/com.serenegiant.usbcameratest0 E/libUVCCamera: [9006UVCPreview.cpp:529:do_preview]: =========== do_preview ========== 2019-05-30 10:50:45.723 8973-9006/com.serenegiant.usbcameratest0 E/libUVCCamera: [9006UVCPreview.cpp:544:do_preview]: =========== frameMode MJPEG ========== 2019-05-30 10:50:45.724 8973-9006/com.serenegiant.usbcameratest0 E/libUVCCamera: [9006UVCPreview.cpp:440:waitPreviewFrame]:pthread_mutex_lock 2019-05-30 10:50:45.724 8973-9006/com.serenegiant.usbcameratest0 E/libUVCCamera: [9006UVCPreview.cpp:442:waitPreviewFrame]:previewFrames.size() : 0 2019-05-30 10:50:45.724 8973-9006/com.serenegiant.usbcameratest0 E/libUVCCamera: [9006UVCPreview.cpp:445:waitPreviewFrame]:pthread_cond_wait

this is code :

void UVCPreview::do_preview(uvc_stream_ctrl_t *ctrl) { ENTER(); LOGE(" =========== do_preview =========="); uvc_frame_t *frame = NULL; uvc_frame_t *frame_mjpeg = NULL; uvc_error_t result = uvc_start_streaming_bandwidth( mDeviceHandle, ctrl, uvc_preview_frame_callback, (void *)this, requestBandwidth, 0);

if (LIKELY(!result)) {
	clearPreviewFrame();
	pthread_create(&capture_thread, NULL, capture_thread_func, (void *)this);

#if LOCAL_DEBUG LOGE("Streaming..."); #endif if (frameMode) { // MJPEG mode LOGE(" =========== frameMode MJPEG =========="); for ( ; LIKELY(isRunning()) ; ) { frame_mjpeg = waitPreviewFrame(); if (LIKELY(frame_mjpeg)) { frame = get_frame(frame_mjpeg->width * frame_mjpeg->height * 2); result = uvc_mjpeg2yuyv(frame_mjpeg, frame); // MJPEG => yuyv // result = uvc_mjpeg2rgb565(frame_mjpeg, frame);

				LOGE(" uvc_mjpeg2yuyv result is %d",result);
				recycle_frame(frame_mjpeg);
				if (LIKELY(!result)) {
				    LOGE("  draw_preview_one "  );
					frame = draw_preview_one(frame, &mPreviewWindow, uvc_any2rgbx, 4);
					addCaptureFrame(frame);
				} else {
				    LOGE("  recycle_frame "  );
					recycle_frame(frame);
				}
			}
		}
	} else {
		// yuvyv mode
		LOGE(" =========== frameMode  yuvyv  :%d========== ",isRunning());

		for ( ; LIKELY(isRunning()) ; ) {
		LOGE(" =========== frame for  ==========");
			frame = waitPreviewFrame();
			LOGE(" =========== waitPreviewFrame ==========");
			if (LIKELY(frame)) {
			LOGE(" =========== addCaptureFrame ==========");
				frame = draw_preview_one(frame, &mPreviewWindow, uvc_any2rgbx, 4);
				addCaptureFrame(frame);
			}
		}
	}
	pthread_cond_signal(&capture_sync);

#if LOCAL_DEBUG LOGE("preview_thread_func:wait for all callbacks complete"); #endif uvc_stop_streaming(mDeviceHandle); #if LOCAL_DEBUG LOGE("Streaming finished"); #endif } else { uvc_perror(result, "failed start_streaming"); }

EXIT();

}