Passing v4l2 buffer to DSP

Hi,

V4L2 support userPtr buffers that means buffers can be allocated outside the V4L2 driver and can be given as application pointers. Framebuffer pointers are used to demonstrate this. V4L2 cant use buffers which are allocated using malloc since they are not physically contiguous. You can use the CMEM module instead, which is a simple memory manager to get physically contiguous buffers. You can find the more about cmem buffer@http://processors.wiki.ti.com/index.php/CMEM_Overview

Eventually I do some image processing on DSP using C6EZAccel. Instead of mmap I allocate buffers by Memory_alloc.

.

CERuntime_init();

hc6 = C6accel_create(engineName, NULL, algName, NULL);

Memory_AllocParams memParams = Memory_DEFAULTPARAMS;

memParams.flags = Memory_CACHED;

memParams.type = Memory_CONTIGHEAP;

buffer_addr[0] = Memory_alloc(buffersize*MAX_BUFFER, &memParams);

Memory_cacheWbInv(buffer_addr[0], buffersize*MAX_BUFFER);

for (i = 1; i < MAX_BUFFER; i++)

    buffer_addr[i] = buffer_addr[i-1] + buffersize;