Hi I have recently started using the MAD decoder. My requirement is to use the MP3 library for the ARM 32 bit processor environement. I have compiled the library with the option FPM_ARM selected (I have modified the MACRO functions for my compiler support keeping the assembly instructions the same). But the audio output was not clear at all. Then I had selected FPM_DEFAULT. With that I am able to hear a feeble (but with noise) audio. /**** mad_f_mul ****/ #define FPM_ARM # define SIZEOF_INT 4 # define SIZEOF_LONG 4 # define SIZEOF_LONG_LONG 8 # define MAD_F_FRACBITS 28 #define MAD_F_SCALEBITS MAD_F_FRACBITS static mad_fixed_t mad_f_mul(mad_fixed_t x,mad_fixed_t y) { mad_fixed_t result; mad_fixed64hi_t hi; mad_fixed64lo_t lo; _asm(-1000," smull %0,%1,%3,%4 movs %0,lsr(%0,%5) adc %2,%0,lsl(%1,%6) ", __reg_gen(__obj_modify(lo)), __reg_gen(__obj_modify(hi)), __reg_gen(__obj_assign(result)), __reg_gen(x), __reg_gen(y), MAD_F_SCALEBITS, (32 - MAD_F_SCALEBITS) ); return result; } /****Ends****/

I like to know if I am missing something? Thanks Balaji Shanmugam

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