Mercurial > spc_convert

     1 snes_spc Change Log

     2 -------------------

     3 

     4 snes_spc 0.9.0

     5 --------------

     6 - Improved documentation

     7 

     8 - SPC: Added spc_skip() function for quickly seeking in an SPC music

     9 file. Runs 3-4x faster than normal playback using the fast DSP (or about

    10 43-60X real-time on my 400 MHz Mac).

    11 

    12 - SPC: Added spc_set_tempo() to change tempo of SPC music playback.

    13 

    14 - SPC: Sample generation is now corrected to generate exactly one pair

    15 of samples every 32 clocks without exception. Before it could generate a

    16 few samples more or less depending on how far ahead or behind DSP was at

    17 the moment.

    18 

    19 - SPC: Changed spc_reset() and spc_soft_reset() to also reset output

    20 buffer (see spc.h).

    21 

    22 - SPC: Fixed minor timer counting bug.

    23 

    24 - SPC: Stack pointer wrap-around is now emulated (and without any

    25 noticeable performance hit).

    26 

    27 - SPC: Runs about 5% faster due to various optimizations.

    28 

    29 - SPC: Found way to make fast DSP register accesses cycle-accurate in

    30 most cases, without reducing performance. Allows fast DSP to pass most

    31 of my validation tests.

    32 

    33 - DSP: Added surround disable support to fast DSP again.

    34 

    35 - DSP: Improved voice un-muting to take effect immediately on fast DSP.

    36 

    37 - DSP: Noise shift register now starts at 0x4000 instead of 0x4001 as it

    38 incorrectly did before.

    39 

    40 - Converted library to C++ code internally. A C interface is still

    41 included in spc.h and dsp.h. Note that these are different than the

    42 previous interface, so your code will require minor changes:

    43 

    44 	Old SPC code                            New SPC code

    45 	- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    46 	#include "spc/spc.h"                    #include "snes_spc/spc.h"

    47 

    48 	snes_spc_t* spc;                        SNES_SPC* spc;

    49 	spc = malloc( sizeof (snes_spc_t) );    spc = spc_new();

    50 	spc_init( spc );

    51 	

    52 	spc_end_frame( time );                  spc_end_frame( spc, time );

    53 	/* etc. */

    54 	

    55 	/* done using SPC */                    spc_delete( spc );

    56 	

    57 	

    58 	Old DSP code                            New DSP code

    59 	- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    60 	#include "spc/spc_dsp.h"                #include "snes_spc/dsp.h"

    61 	

    62 	spc_dsp_init( ram );                    SPC_DSP* dsp;

    63 											dsp = spc_dsp_new();

    64 											spc_dsp_init( dsp, ram );

    65 	

    66 	spc_dsp_run( count );                   spc_dsp_run( dsp, count );

    67 	/* etc. */

    68 	

    69 	/* done using DSP */                    spc_dsp_delete( dsp );

    70 	

    71 

    72 snes_spc 0.8.0

    73 --------------

    74 - Added several demos

    75 

    76 - Added high-pass/low-pass filter to better match SNES sound

    77 

    78 - Added save state functionality for SPC and accurate DSP (but not fast

    79 DSP)

    80 

    81 - Added emulation of reset switch on NES (soft reset)

    82 

    83 - Made source more compatible with pre-C99 compilers by eliminating

    84 mid-block declarations

    85 

    86 - SPC: Many S-SMP accuracy improvements, mostly in memory access times

    87 

    88 - SPC: S-SMP speed improvements

    89 

    90 - SPC: Added SPC load/save functions and KON checking to help trim

    91 silence from beginning

    92 

    93 - SPC: Changed spc_init() to have you allocate most of the memory used

    94 by the library so you have more control over it

    95 

    96 - DSP: New highly accurate DSP and faster version derived from same code

    97 

    98 - DSP: Changed prefix from dsp_ to spc_dsp_. Your DSP code will require

    99 changes.

   100 

   101 - DSP: Removed surround disable and gain. Gain can now be done with the

   102 dsp_filter module, and surround disable will probably only be

   103 implemented in the fast DSP at some point.

   104 

   105 - DSP: Changed interface to work in clocks rather than samples,

   106 necessary for the new accurate DSP. Sample output is now done with

   107 separate functions. Your DSP code will require changes.
author	Robert McIntyre <rlm@mit.edu>
date	Fri, 21 Oct 2011 07:46:18 -0700
parents	e38dacceb958
children