colour shift in DSP application on AM57xx

By confirm the source, only size of luma data was filled...

decoder->input_sz = width * height; ======================> only Y data
decoder->input_bo = omap_bo_new(decoder->disp->dev,
decoder->input_sz, OMAP_BO_WC);
decoder->input = omap_bo_map(decoder->input_bo);
decoder->framebuf = disp_get_fb(decoder->disp);

{
FILE *fd;
fd = fopen(infile, "rb");
fread(decoder->input, width*height, sizeof(char), fd);
fclose(fd);
}

Yuvcopy just demonstrates copying input to output copying using universal copy algorithm via VIDDEC2 interface.

Here universal copy is copying only luma to output buffer and chroma is not copied.

But display is interpreting some values of chroma in the buffer hence you see color mismatch.

Ram

hi Ramprasad,
Many thanks for your reply.

I found following code as looking the source of yuvcopy,

padded_width = width;
padded_height= height;

decoder->num_outBuf = 2;
decoder->padded_width = padded_width;
decoder->padded_height = padded_height;

Did you know
Q1. why num_outBuf is 2 ??
Q2. how to decide num_outBuf in different application ?? Is there anything I need to notice ??

Q3. In AM57xx, there're 2 DSPs. how do I know which DSP was used now ??  And how do I choose different DSP ??

Thanks

1) For yuvcopy application one output buffer is sufficient since the algorithm doesn't lock the output buffer and immediately releases after processing.

2) num_outBuf depends on the algorithm. If the algorithm like video decoder which locks the output buffer for referenceing, releases the buffers after 3-4 frame-processing in such case need to allocate more output buffers.