A Framework for Video Processing with the DM6437 DVDP *

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1 OpenStax-CNX module: m A Framework for Video Processing with the DM6437 DVDP * Jacob Fainguelernt This work is produced by OpenStax-CNX and licensed under the Creative Commons Attribution License 2.0 Abstract This module describes general procedures for reading and writing video streams using the DM6437 Digital Video Development Platform (DVDP). The scripts and models created in this chapter will be the basis for simulation and implementation of video processing algorithms. 1 Introduction This chapter describes general procedures for reading and writing video streamss. The scripts and models created in this chapter will be the basis for the other video processing chapters. 1.1 Hardware and Software Requirements This laboratory was originally developed using the following hardware and software: MATLAB R2008a Code Composer Studio (CCS) v3.3 Texas Instruments DM6437 Digital Video Development Platform (DVDP). Video camera and screen. 1.2 Related Files Simulink Model for Simulation - Video_sim.mdl 1 Input Video File - vipmem_y.avi 2 Simulink Model for Real-Time Video Processing with a Camera- Video_R_W.mdl 3 MATLAB script for Real-Time TCP/IP Interface - RW_tcpip_script.m 4 Simulink Model for Real-Time Video Processing through the TCP/IP Interface - RW_dm6437_tcpip.mdl 5 * Version 1.1: May 26, :34 am See the le at < 2 See the le at < 3 See the le at < 4 See the le at < 5 See the le at <

OpenStax-CNX module: m23999 2 Simulink Model for PC Control of Real-Time Video Processing through the TCP/IP Interface - RW_pcl_tcpip.mdl 6 2 Simulation Start by creating a new model in Simulink. 1.

2 OpenStax-CNX module: m Simulink Model for PC Control of Real-Time Video Processing through the TCP/IP Interface - RW_pcl_tcpip.mdl 6 2 Simulation Start by creating a new model in Simulink. 1. Open the Simulink library browser and add the "From Multimedia File" from the "Sources" group of the Video and Image Processing Blockset (Please refer to Figure 1). Figure 1: The "From Multimedia File" Simulink Block 2. Double Click and select the vipmem_y.avi 7 input le(please refer to Figure 2). 6 See the le at < 7 See the le at <

OpenStax-CNX module: m23999 3 Figure 2: Source Block Conguration 3.

3 OpenStax-CNX module: m Figure 2: Source Block Conguration 3. In order to display the picture the "Video Viewer" from the "Sinks" group of the Video and Image Processing Blockset will be used.

4 OpenStax-CNX module: m Figure 3: The "To Video Display" Block

OpenStax-CNX module: m23999 5 Figure 4: Conguring the Video

5 OpenStax-CNX module: m Figure 4: Conguring the Video Viewer 4. Connect the three blocks as shown in Figure 5. Figure 5: Displaying a Video-Clip 5. Run the model, you should see the video clip. A single frame is shown mage shown in Figure 6.

OpenStax-CNX module: m23999 6 Figure 6: The Video Display 6. Save your model (We used the name Video_sim.mdl", that you may nd it here 8 ).

Figure 7: Using the Video I/O of the DM6437 board 3.1.1 CCS Code Generation This procedure is similar to the one developed for stills pictures.

6 OpenStax-CNX module: m Figure 6: The Video Display 6. Save your model (We used the name Video_sim.mdl", that you may nd it here 8 ). 3 Real-Time Processing with the DM6437 DVDP 3.1 Using a Camera and a Display The procedure for capture/display video using the DM6437 is shown in Figure 7. Figure 7: Using the Video I/O of the DM6437 board CCS Code Generation This procedure is similar to the one developed for stills pictures. Video will be capture/display using a camera and a monitor. Image acquisition and Processing will run in a DSP/BIOS task. 1. Open the stills_r_w.mdl 8 See the le at <

7 OpenStax-CNX module: m Delete the From RTDX and To RTDX blocks 3. Add the "Task" block from the "DSP/BIOS library" group of the "Target Support Package TC6" Blockset. 4. Add the Function- Call Subsystem from the Ports & Subsystems" group of the "Simulink" Blockset (Please refer to Figure 8). Figure 8: The "Function-Call Subsystem" Block 5. Rename Function- Call Subsystem to Video Processing and connect it to the Task block. 6. Save the model as Video_R_W.mdl. Your model should look as follows 9 : 9 You may add a title to the model, as done here ( Video Processing Template)

OpenStax-CNX module: m23999 8 Figure 9: The Video Processing Model Template 7.

8 OpenStax-CNX module: m Figure 9: The Video Processing Model Template 7. Double-click the Task block and make the same changes as shown in Figure 34.

9 OpenStax-CNX module: m Figure 10: Conguring a "Task" 8. Double-click the Video Processing block. A new window will be opened. 9. In the new window, add the "Video Capture" and "Video Display" from the "DM6437 EVM Board Support" group of the ""Target Support Package TC6" Blockset as shown in Figure 11.

OpenStax-CNX module: m23999 10 Figure 11: The "Video Capture" block 10.

10 OpenStax-CNX module: m Figure 11: The "Video Capture" block 10. Double-click the Video Capture block and change the Sample Time (and the Video capture mode only if you are using the components in the PAL mode) as shown in Figure 12.

OpenStax-CNX module: m23999 11 Figure 12: Video Capture Conguration 11.

are using the components in the PAL 10 mode as shown in Figure 13.

11 OpenStax-CNX module: m Figure 12: Video Capture Conguration 11. Double-click the Video Display block and change the Video capture mode only if you are using the components in the PAL 10 mode as shown in Figure 13. Figure 13: Video Display Conguration 10 If the camera video capture mode is NTSC you should choose this option

OpenStax-CNX module: m23999 12 12. Connect the blocks as shown in Figure 14. Figure 14: Capturing and Displaying Video 13. Generate code & create project. Double-click the " Generate code &.." block.

12 OpenStax-CNX module: m Connect the blocks as shown in Figure 14. Figure 14: Capturing and Displaying Video 13. Generate code & create project. Double-click the " Generate code &.." block. 14. Build the project. Double-click the Build Project block. 15. Load the project. Double-click the Load Project block. 16. Run the target. Double-click the Run block. This model can be found here Using the TCP/IP Interface This section will describe a Simulink model used to generate code for capturing and displaying video frames from/to the PC target using the TCP/IP protocol See the le at < 12 You should allocate an IP address to the DM6437 DVDP, as described in the board documentation.

OpenStax-CNX module: m23999 13 Figure 15: Capturing and Displaying Video Using the TCP/IP port 1. Create a new Simulink model 2.

13 OpenStax-CNX module: m Figure 15: Capturing and Displaying Video Using the TCP/IP port 1. Create a new Simulink model 2. Open the Simulink library browser and add the "C6437EVM" from the "Target Support Package TC6" group of the " C6000 Target Preferences" Blockset (Please refer to Figure 16).

OpenStax-CNX module: m23999 14 Figure 16: The "C6437EVM" Block We now need to create Simulink dedicated block to execute CCS commands. 3.

14 OpenStax-CNX module: m Figure 16: The "C6437EVM" Block We now need to create Simulink dedicated block to execute CCS commands. 3. Drag in an empty subsystem into the model (Simulink->Ports & Subsystem-> Subsystem). 4. Delete its contents 5. Format it: Give it a name. In our example we use Bulid / Reload & Run". 6. Right click on the Subsystem, choose Block Properties. Go to the Callbacks tab, and under OpenFcn* enter: RW_tcpip_script('RW_pcl_tcpip');, as shown in the following picture:

OpenStax-CNX module: m23999 15 Figure 17: Creating the Bulid / Reload & Run Simulink block 7.

15 OpenStax-CNX module: m Figure 17: Creating the Bulid / Reload & Run Simulink block 7. Add the "Task" block from the "DSP/BIOS library" group of the "Target Support Package TC6" Blockset. 8. Add the Function- Call Subsystem from the Ports & Subsystems" group of the "Simulink" Blockset (Please refer to Figure 18).

16 OpenStax-CNX module: m Figure 18: The "Function-Call Subsystem" Block 9. Rename Function- Call Subsystem to R_W Algorithm and connect it to the Task block. 10. Add the "IP Cong" block from "Target Support Package TC6->DM6437 EVM Board Support" 11. Save the model as RW_dm6437_tcpip.mdl. Your model should look as follows:

OpenStax-CNX module: m23999 17 Figure 19: The " RW_dm6437_tcpip.

17 OpenStax-CNX module: m Figure 19: The " RW_dm6437_tcpip.mdl " Model 12. Double-click the Task block and make the same changes as shown in Figure 20.

OpenStax-CNX module: m23999 18 Figure 20: "Task" Conguration 13.

18 OpenStax-CNX module: m Figure 20: "Task" Conguration 13. Double-click the IP Cong block and make the same changes as shown in Figure 21.

OpenStax-CNX module: m23999 19 Figure 21: IP Cong Conguration 14. Double-click the R_W Algorithm block. A new window will be opened. 15.

19 OpenStax-CNX module: m Figure 21: IP Cong Conguration 14. Double-click the R_W Algorithm block. A new window will be opened. 15. In the new window, add the "TCP/IP Recive", "TCP/IP Send", "Byte Unpack" and "Byte Pack" from the "C6000 DSP Communication Libary" group of the ""Target Support Package TC6" Blockset as shown in Figure 22.

OpenStax-CNX module: m23999 20 Figure 22: The "TCP/IP Receive" and

20 OpenStax-CNX module: m Figure 22: The "TCP/IP Receive" and "TCP/IP Send" blocks 16. Connect the blocks as shown in Figure 23.

OpenStax-CNX module: m23999 21 Figure 23: The R_W Algorithm block 17.

21 OpenStax-CNX module: m Figure 23: The R_W Algorithm block 17. Double-click the TCP/IP Receive block and make the same changes as shown in Figure 24.

OpenStax-CNX module: m23999 22 (a) Figure 24:

22 OpenStax-CNX module: m (a) Figure 24: "TCP/IP Receive" Conguration (a) Main Screen (b) Data Types (b). 18. Double-click the TCP/IP Send block and congure it as shown in Figure 25:

23 OpenStax-CNX module: m Figure 25: "TCP/IP Send" Conguration 19. Double-click the Byte Unpack block and congure it as shown in Figure 26.

OpenStax-CNX module: m23999 24 Figure 26: " Byte Unpack " Conguration

27. Figure 27: " Byte Pack " Conguration 21.

24 OpenStax-CNX module: m Figure 26: " Byte Unpack " Conguration 20. Double-click the Byte pack block and congure it as shown in Figure 27. Figure 27: " Byte Pack " Conguration 21. Open a new m-le, copy the following code and save it as "RW_tcpip_script.m" at the same directory

OpenStax-CNX module: m23999 25 as the model. 22. Create another new Simulink model.

25 OpenStax-CNX module: m as the model. 22. Create another new Simulink model. Add the "Byte Pack" from the "C6000 DSP Communication Libary" group of the ""Target Support Package TC6" Blockset as shown before and the "TCP/IP Receive", "TCP/IP Send" from the "Instrument Control Toolbox" blockset. 23. Congure the " TCP/IP Receive " and " TCP/IP Send " blocks : (a) (b) Figure 28: TCP/IP Send "TCP/IP Receive" "TCP/IP Send" Blocks Conguration (a) "TCP/IP Receive" (b) 24. Add the "To Video Display" from the "DM6437 EVM Board Support" group of the ""Target Support Package TC6" Blockset, also add the "From Multimedia File" from " Signal Processing Sources" group of the "Signal Processing blockset". 25. Congure the " From Multimedia File " block

OpenStax-CNX module: m23999 26 (a) Figure 29: "From Multimedia File" Conguration (a) "TCP/IP Receive" (b) TCP/IP Send (b) 26.

Rename Function- Call Subsystem to Display.Double-click the Display block. A new window will be opened.

26 OpenStax-CNX module: m (a) Figure 29: "From Multimedia File" Conguration (a) "TCP/IP Receive" (b) TCP/IP Send (b) 26. Add the Subsystem from the Ports & Subsystems" group of the "Simulink" Blockset as shown before. 27. Rename Function- Call Subsystem to Display.Double-click the Display block. A new window will be opened. In the new window, add the "Byte Unpack" and " To Video Display " as shown before, add the "Reshape" from the "Math Operations" grope of the "Simulink" blockset. (Congurations are the same as before). 28. Connect the blocks as follows:

OpenStax-CNX module: m23999 27 Figure 30: The "Display" block 29. Your model should look as follows: 30.

Double-click the "Build / Reload & Run" block. 32.

27 OpenStax-CNX module: m Figure 30: The "Display" block 29. Your model should look as follows: 30. Save it as RW_pcl_tcpip.mdl. 31. Build load and run the project. Double-click the "Build / Reload & Run" block. 32. Running the script, you will see the video captured and displayed. A single frame is shown in Figure 32. (a) (b) Figure 31: Capturing and Displaying Video Using TCP/IP (a) The Captured Video (b) The Displayed Video

28 OpenStax-CNX module: m This model can be found here See the le at <

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