104 lines
3.7 KiB
Plaintext
104 lines
3.7 KiB
Plaintext
################# REMOVE warnings on trimedia compiler ##############################
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################# Not critical to compilation ##############################
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1. Change the following statements to remove warning for constant expression
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(i) mdf.c [if(0) --> #if 0]
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(ii) preprocess.c [if(1) --> #if 1]
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2. add REMARK_ON macro to remove warning on not reference variable
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-- uses (void)<variable> to remove warning on not referenced variable
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-- #define REMARK_ON
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-- (void)<variable>
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-- #endif
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-- search for REMARK_ON on the following files
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(i) jitter.c
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(ii) mdf.c
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(iii) filterbank.c
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(iv) preprocess.c
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3. commented out the following in pseudofloat.h for unused variable
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//static const spx_float_t FLOAT_HALF = {16384,-15};
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################# Patches for trimedia compiler ##############################
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################# Critical to compilation ##############################
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-- added the #elif defined (TM_ASM) to the following files for optimized codes
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(1) arch.h
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(2) fftwrap.c
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(3) filterbank.c
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(4) kiss_fft.c
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(5) kiss_fftr.c
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(6) mdf.c
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(7) preprocess.c
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-- added macro PREPROCESS_MDF_FLOAT to allow using of floating point
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-- in mdf and preprocess while keeping fixed point in encoder/decoder
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-- This is due to the fact that preprocess/mdf run faster on floating
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-- point on trimedia
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-- added the following 3 lines to the files below
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#ifdef PREPROCESS_MDF_FLOAT
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#undef FIXED_POINT
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#endif
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(1) mdf.c
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(2) preprocess.c
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(3) filterbank.c
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(4) fftwrap.c
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(5) kiss_fft.c
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(6) kiss_fftr.c
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-- created a new USE_COMPACT_KISS_FFT for fftwrap.c and shifted defination
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-- to config file so that user configure the usage of fft on config.h
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-- TOEXPLORE:is it possible to share table between mdf/preprocess?
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-- Introducing this macro made the following changes in C code
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-- New macro to facilitate integration
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(grouping real/complex for dc and nyquist frequency seems to require a large
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amount of memory for mdf, therefore did not made the changes for that)
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(1) modify preprocess.c on init and destroy
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(2) modify mdf.c on init and destroy
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(3) shifted power_spectrum to fftwrap.c to share optimised code between
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preprocess.c and mdf.c
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################# NOTES ##############################
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(1) fixed point encoding/decoding is tested on narrowband
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- some of the QX fractions are packed together to
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(frac1 * a + frac2 * a) >> X (should be more accurate in rounding)
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instead of
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((frac1 * a) >> X) + ((frac2 * a) >> X)
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will cause some different between optimized and unoptimized code.
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tried decoding/encoding optimized code on some audio files retains
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the clearity of the word
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- wideband/ultrawideband is not heavily tested yet
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(2) optimized fixed point code requires memory alignment
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- used config to debug on functions where memory is not align
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(3) floating point optimization for preprocess/mdf is tested
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fixed point is not tested yet (except fft/filterbank)
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Note (1) also applies to sround in fft for fixed point
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some optimization is provided for fixed point as it requires lesser
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memory compared to floating point.
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(4) unroll configurations provided to reduce code size if required
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(5) use profile options only if compiler profiling fails to work
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(6) can't include the makefile as it is close proprietary
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################# TODO:For Trimedia ##############################
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(1) Optimizations for fixed point in mdf/preprocess
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################# Added Files ##############################
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- _kiss_fft_guts_tm.h
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- fftwrap_tm.h
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- filterbank_tm.h
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- filters_tm.h
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- fixed_tm.h
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- kiss_fft_tm.h
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- kiss_fftr_tm.h
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- mdf_tm.h
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- misc_tm.h
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- preprocess_tm.h
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- config.h
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- speex_config_types.h
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