Subversion Repositories mpeg2fpga

Additional tracing and dumping added. Sample command line:

 mpeg2decode -r -v9 -t -o0  'dump_%d_out_%c' -b tcela-10.bits

Write frames to ppm files:

 mpeg2decode -r -o3  'frame_%d_field_%c' -b tcela-10.bits

Output to X11:

 mpeg2decode -r -o5 -b tcela-10.bits

Trace options in the code:

In global.h:

#define TRACE 1

// Run-length decoding

//#define TRACE_RLD 1

// DCT decoding

//#define TRACE_DCT 1

// Inverse Discrete Cosine Transform

//#define TRACE_IDCT 1

// Trace calculation of individual pixels (very detailed)

//#define TRACE_RECON 1

TRACE_RECON is for low-level debugging, and produces very large amounts of logging.

A sample line from TRACE_RECON logging:

form_component_prediction (6): 0.5 * (fwd_y[  5,  0](=156) + fwd_y[  6,  0](=158)) ->  aux_y[  0,  0](=157)

Interpret this as: calculate the average of the y[5,0] of the forward reference frame (with value 156) and y[6,0] of the forward reference frame (with value 158), and store the result (with value 157) in pixel y[0,0] of the auxiliary frame.

koen