Increase FPS on defalt SC3336 camera.

[RodrigoStefanini]

Hello enthusiasts.
I am a new developer in this board MINI B, I'm doing some tests for high FPS camera.
What is my question?

I modify the configuration of video.0 on SDK and rebuild de SO.
My configuration was directly on rkipc-300w file (decreasing the width and heigth to 704x576 and increasing the video0:src_frame_rate_num = 60, video0:dst_frame_rate_num = 60 and isp.0.adjustment:fps = 60;

I got this:

I trie to encrease to 120 fps and:

I suspect that this is not real, but I have not yet implemented a good LOG to prove this directly in the source code, a simple attempt to use a printf in the execution of the code with the FPS information.

my implementation:

static RK_U64 getNowUs() {
	struct timespec time = {0, 0};
	clock_gettime(CLOCK_MONOTONIC, &time);
	return (RK_U64)time.tv_sec * 1000000 + (RK_U64)time.tv_nsec / 1000; 
}

.
.
.

static void *rkipc_get_venc_0(void *arg) {
	LOG_DEBUG("#Start %s thread, arg:%p\n", __func__, arg);
	prctl(PR_SET_NAME, "RkipcVenc0", 0, 0, 0);
	VENC_STREAM_S stFrame;
	VI_CHN_STATUS_S stChnStatus;
	int loopCount = 0;
	int ret = 0;
	// FILE *fp = fopen("/data/venc.h265", "wb");
	stFrame.pstPack = malloc(sizeof(VENC_PACK_S));
	char fps_text[16];
	float fps = 0;
	memset(fps_text, 0, 16);
	RK_U64 nowUs;
	RK_U64 beforeUs;

	while (g_video_run_) {
		// 5.get the frame
		beforeUs = getNowUs();
		ret = RK_MPI_VENC_GetStream(VIDEO_PIPE_0, &stFrame, 2500);
		sprintf(fps_text, "FPS = %.2f", fps);
		if (ret == RK_SUCCESS) {
			void *data = RK_MPI_MB_Handle2VirAddr(stFrame.pstPack->pMbBlk);
			// fwrite(data, 1, stFrame.pstPack->u32Len, fp);
			// fflush(fp);
			// LOG_DEBUG("Count:%d, Len:%d, PTS is %" PRId64", enH264EType is %d\n", loopCount,
			// stFrame.pstPack->u32Len, stFrame.pstPack->u64PTS,
			// stFrame.pstPack->DataType.enH264EType);
			rkipc_rtsp_write_video_frame(0, data, stFrame.pstPack->u32Len, stFrame.pstPack->u64PTS);
			if ((stFrame.pstPack->DataType.enH264EType == H264E_NALU_IDRSLICE) ||
			    (stFrame.pstPack->DataType.enH264EType == H264E_NALU_ISLICE) ||
			    (stFrame.pstPack->DataType.enH265EType == H265E_NALU_IDRSLICE) ||
			    (stFrame.pstPack->DataType.enH265EType == H265E_NALU_ISLICE)) {
				rk_storage_write_video_frame(0, data, stFrame.pstPack->u32Len,
				                             stFrame.pstPack->u64PTS, 1);
				if (enable_rtmp)
					rk_rtmp_write_video_frame(0, data, stFrame.pstPack->u32Len,
					                          stFrame.pstPack->u64PTS, 1);
			} else {
				rk_storage_write_video_frame(0, data, stFrame.pstPack->u32Len,
				                             stFrame.pstPack->u64PTS, 0);
				if (enable_rtmp)
					rk_rtmp_write_video_frame(0, data, stFrame.pstPack->u32Len,
					                          stFrame.pstPack->u64PTS, 0);
			}
			// 7.release the frame
			ret = RK_MPI_VENC_ReleaseStream(VIDEO_PIPE_0, &stFrame);
			if (ret != RK_SUCCESS) {
				LOG_ERROR("RK_MPI_VENC_ReleaseStream fail %x\n", ret);
			}
			loopCount++;
			nowUs = getNowUs();
			fps = (float)1000000 / (float)(nowUs - beforeUs);
			printf("%s\n", fps_text);
		} else {
			LOG_ERROR("RK_MPI_VENC_GetStream timeout %x\n", ret);
		}
	}
	if (stFrame.pstPack)
		free(stFrame.pstPack);
	// if (fp)
	// fclose(fp);

	return 0;
}