Mercurial > sdl-ios-xcode
diff src/audio/dc/aica.c @ 1662:782fd950bd46 SDL-1.3
Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
WARNING: None of the video drivers have been updated for the new API yet! The API is still under design and very fluid.
The code is now run through a consistent indent format:
indent -i4 -nut -nsc -br -ce
The headers are being converted to automatically generate doxygen documentation.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 28 May 2006 13:04:16 +0000 |
| parents | 11134dc42da8 |
| children | 11775724e3fe |
line wrap: on
line diff
--- a/src/audio/dc/aica.c Sun May 21 17:27:13 2006 +0000 +++ b/src/audio/dc/aica.c Sun May 28 13:04:16 2006 +0000 @@ -9,8 +9,8 @@ #include <arch/irq.h> #include <dc/spu.h> -/* #define dc_snd_base ((volatile unsigned char *)0x00800000) */ /* arm side */ -#define dc_snd_base ((volatile unsigned char *)0xa0700000) /* dc side */ + /* #define dc_snd_base ((volatile unsigned char *)0x00800000) *//* arm side */ +#define dc_snd_base ((volatile unsigned char *)0xa0700000) /* dc side */ /* Some convienence macros */ #define SNDREGADDR(x) (0xa0700000 + (x)) @@ -39,26 +39,29 @@ } while(0) -void aica_init() { - int i, j, old = 0; - - /* Initialize AICA channels */ - G2_LOCK(old); - SNDREG32(0x2800) = 0x0000; - - for (i=0; i<64; i++) { - for (j=0; j<0x80; j+=4) { - if ((j&31)==0) g2_fifo_wait(); - CHNREG32(i, j) = 0; - } - g2_fifo_wait(); - CHNREG32(i,0) = 0x8000; - CHNREG32(i,20) = 0x1f; - } +void +aica_init () +{ + int i, j, old = 0; + + /* Initialize AICA channels */ + G2_LOCK (old); + SNDREG32 (0x2800) = 0x0000; - SNDREG32(0x2800) = 0x000f; - g2_fifo_wait(); - G2_UNLOCK(old); + for (i = 0; i < 64; i++) { + for (j = 0; j < 0x80; j += 4) { + if ((j & 31) == 0) + g2_fifo_wait (); + CHNREG32 (i, j) = 0; + } + g2_fifo_wait (); + CHNREG32 (i, 0) = 0x8000; + CHNREG32 (i, 20) = 0x1f; + } + + SNDREG32 (0x2800) = 0x000f; + g2_fifo_wait (); + G2_UNLOCK (old); } /* Translates a volume from linear form to logarithmic form (required by @@ -86,25 +89,25 @@ }; */ const static unsigned char logs[] = { - 0, 15, 22, 27, 31, 35, 39, 42, 45, 47, 50, 52, 55, 57, 59, 61, - 63, 65, 67, 69, 71, 73, 74, 76, 78, 79, 81, 82, 84, 85, 87, 88, - 90, 91, 92, 94, 95, 96, 98, 99, 100, 102, 103, 104, 105, 106, - 108, 109, 110, 111, 112, 113, 114, 116, 117, 118, 119, 120, 121, - 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, - 135, 136, 137, 138, 138, 139, 140, 141, 142, 143, 144, 145, 146, - 146, 147, 148, 149, 150, 151, 152, 152, 153, 154, 155, 156, 156, - 157, 158, 159, 160, 160, 161, 162, 163, 164, 164, 165, 166, 167, - 167, 168, 169, 170, 170, 171, 172, 173, 173, 174, 175, 176, 176, - 177, 178, 178, 179, 180, 181, 181, 182, 183, 183, 184, 185, 185, - 186, 187, 187, 188, 189, 189, 190, 191, 191, 192, 193, 193, 194, - 195, 195, 196, 197, 197, 198, 199, 199, 200, 200, 201, 202, 202, - 203, 204, 204, 205, 205, 206, 207, 207, 208, 209, 209, 210, 210, - 211, 212, 212, 213, 213, 214, 215, 215, 216, 216, 217, 217, 218, - 219, 219, 220, 220, 221, 221, 222, 223, 223, 224, 224, 225, 225, - 226, 227, 227, 228, 228, 229, 229, 230, 230, 231, 232, 232, 233, - 233, 234, 234, 235, 235, 236, 236, 237, 237, 238, 239, 239, 240, - 240, 241, 241, 242, 242, 243, 243, 244, 244, 245, 245, 246, 246, - 247, 247, 248, 248, 249, 249, 250, 250, 251, 251, 252, 252, 253, 254, 255 + 0, 15, 22, 27, 31, 35, 39, 42, 45, 47, 50, 52, 55, 57, 59, 61, + 63, 65, 67, 69, 71, 73, 74, 76, 78, 79, 81, 82, 84, 85, 87, 88, + 90, 91, 92, 94, 95, 96, 98, 99, 100, 102, 103, 104, 105, 106, + 108, 109, 110, 111, 112, 113, 114, 116, 117, 118, 119, 120, 121, + 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, + 135, 136, 137, 138, 138, 139, 140, 141, 142, 143, 144, 145, 146, + 146, 147, 148, 149, 150, 151, 152, 152, 153, 154, 155, 156, 156, + 157, 158, 159, 160, 160, 161, 162, 163, 164, 164, 165, 166, 167, + 167, 168, 169, 170, 170, 171, 172, 173, 173, 174, 175, 176, 176, + 177, 178, 178, 179, 180, 181, 181, 182, 183, 183, 184, 185, 185, + 186, 187, 187, 188, 189, 189, 190, 191, 191, 192, 193, 193, 194, + 195, 195, 196, 197, 197, 198, 199, 199, 200, 200, 201, 202, 202, + 203, 204, 204, 205, 205, 206, 207, 207, 208, 209, 209, 210, 210, + 211, 212, 212, 213, 213, 214, 215, 215, 216, 216, 217, 217, 218, + 219, 219, 220, 220, 221, 221, 222, 223, 223, 224, 224, 225, 225, + 226, 227, 227, 228, 228, 229, 229, 230, 230, 231, 232, 232, 233, + 233, 234, 234, 235, 235, 236, 236, 237, 237, 238, 239, 239, 240, + 240, 241, 241, 242, 242, 243, 243, 244, 244, 245, 245, 246, 246, + 247, 247, 248, 248, 249, 249, 250, 250, 251, 251, 252, 252, 253, 254, 255 }; /* For the moment this is going to have to suffice, until we really @@ -113,23 +116,25 @@ #define AICA_VOL(x) (0xff - logs[128 + (((x) & 0xff) / 2)]) //#define AICA_VOL(x) (0xff - logs[x&255]) -static inline unsigned AICA_FREQ(unsigned freq) { - unsigned long freq_lo, freq_base = 5644800; - int freq_hi = 7; +static inline unsigned +AICA_FREQ (unsigned freq) +{ + unsigned long freq_lo, freq_base = 5644800; + int freq_hi = 7; - /* Need to convert frequency to floating point format - (freq_hi is exponent, freq_lo is mantissa) - Formula is ferq = 44100*2^freq_hi*(1+freq_lo/1024) */ - while (freq < freq_base && freq_hi > -8) { - freq_base >>= 1; - --freq_hi; - } - while (freq < freq_base && freq_hi > -8) { - freq_base >>= 1; - freq_hi--; - } - freq_lo = (freq<<10) / freq_base; - return (freq_hi << 11) | (freq_lo & 1023); + /* Need to convert frequency to floating point format + (freq_hi is exponent, freq_lo is mantissa) + Formula is ferq = 44100*2^freq_hi*(1+freq_lo/1024) */ + while (freq < freq_base && freq_hi > -8) { + freq_base >>= 1; + --freq_hi; + } + while (freq < freq_base && freq_hi > -8) { + freq_base >>= 1; + freq_hi--; + } + freq_lo = (freq << 10) / freq_base; + return (freq_hi << 11) | (freq_lo & 1023); } /* Sets up a sound channel completely. This is generally good if you want @@ -148,15 +153,18 @@ This routine (and the similar ones) owe a lot to Marcus' sound example -- I hadn't gotten quite this far into dissecting the individual regs yet. */ -void aica_play(int ch,int mode,unsigned long smpptr,int loopst,int loopend,int freq,int vol,int pan,int loopflag) { +void +aica_play (int ch, int mode, unsigned long smpptr, int loopst, int loopend, + int freq, int vol, int pan, int loopflag) +{ /* int i; */ - int val; - int old = 0; + int val; + int old = 0; - /* Stop the channel (if it's already playing) */ - aica_stop(ch); - /* doesn't seem to be needed, but it's here just in case */ + /* Stop the channel (if it's already playing) */ + aica_stop (ch); + /* doesn't seem to be needed, but it's here just in case */ /* for (i=0; i<256; i++) { asm("nop"); @@ -165,107 +173,127 @@ asm("nop"); } */ - G2_LOCK(old); - /* Envelope setup. The first of these is the loop point, - e.g., where the sample starts over when it loops. The second - is the loop end. This is the full length of the sample when - you are not looping, or the loop end point when you are (though - storing more than that is a waste of memory if you're not doing - volume enveloping). */ - CHNREG32(ch, 8) = loopst & 0xffff; - CHNREG32(ch, 12) = loopend & 0xffff; - - /* Write resulting values */ - CHNREG32(ch, 24) = AICA_FREQ(freq); - - /* Set volume, pan, and some other things that we don't know what - they do =) */ - CHNREG32(ch, 36) = AICA_PAN(pan) | (0xf<<8); - /* Convert the incoming volume and pan into hardware values */ - /* Vol starts at zero so we can ramp */ - vol = AICA_VOL(vol); - CHNREG32(ch, 40) = 0x24 | (vol<<8); - /* Convert the incoming volume and pan into hardware values */ - /* Vol starts at zero so we can ramp */ + G2_LOCK (old); + /* Envelope setup. The first of these is the loop point, + e.g., where the sample starts over when it loops. The second + is the loop end. This is the full length of the sample when + you are not looping, or the loop end point when you are (though + storing more than that is a waste of memory if you're not doing + volume enveloping). */ + CHNREG32 (ch, 8) = loopst & 0xffff; + CHNREG32 (ch, 12) = loopend & 0xffff; + + /* Write resulting values */ + CHNREG32 (ch, 24) = AICA_FREQ (freq); + + /* Set volume, pan, and some other things that we don't know what + they do =) */ + CHNREG32 (ch, 36) = AICA_PAN (pan) | (0xf << 8); + /* Convert the incoming volume and pan into hardware values */ + /* Vol starts at zero so we can ramp */ + vol = AICA_VOL (vol); + CHNREG32 (ch, 40) = 0x24 | (vol << 8); + /* Convert the incoming volume and pan into hardware values */ + /* Vol starts at zero so we can ramp */ - /* If we supported volume envelopes (which we don't yet) then - this value would set that up. The top 4 bits determine the - envelope speed. f is the fastest, 1 is the slowest, and 0 - seems to be an invalid value and does weird things). The - default (below) sets it into normal mode (play and terminate/loop). - CHNREG32(ch, 16) = 0xf010; - */ - CHNREG32(ch, 16) = 0x1f; /* No volume envelope */ - - - /* Set sample format, buffer address, and looping control. If - 0x0200 mask is set on reg 0, the sample loops infinitely. If - it's not set, the sample plays once and terminates. We'll - also set the bits to start playback here. */ - CHNREG32(ch, 4) = smpptr & 0xffff; - val = 0xc000 | 0x0000 | (mode<<7) | (smpptr >> 16); - if (loopflag) val|=0x200; - - CHNREG32(ch, 0) = val; - - G2_UNLOCK(old); + /* If we supported volume envelopes (which we don't yet) then + this value would set that up. The top 4 bits determine the + envelope speed. f is the fastest, 1 is the slowest, and 0 + seems to be an invalid value and does weird things). The + default (below) sets it into normal mode (play and terminate/loop). + CHNREG32(ch, 16) = 0xf010; + */ + CHNREG32 (ch, 16) = 0x1f; /* No volume envelope */ + - /* Enable playback */ - /* CHNREG32(ch, 0) |= 0xc000; */ - g2_fifo_wait(); + /* Set sample format, buffer address, and looping control. If + 0x0200 mask is set on reg 0, the sample loops infinitely. If + it's not set, the sample plays once and terminates. We'll + also set the bits to start playback here. */ + CHNREG32 (ch, 4) = smpptr & 0xffff; + val = 0xc000 | 0x0000 | (mode << 7) | (smpptr >> 16); + if (loopflag) + val |= 0x200; + + CHNREG32 (ch, 0) = val; + + G2_UNLOCK (old); + + /* Enable playback */ + /* CHNREG32(ch, 0) |= 0xc000; */ + g2_fifo_wait (); #if 0 - for (i=0xff; i>=vol; i--) { - if ((i&7)==0) g2_fifo_wait(); - CHNREG32(ch, 40) = 0x24 | (i<<8);; - } + for (i = 0xff; i >= vol; i--) { + if ((i & 7) == 0) + g2_fifo_wait (); + CHNREG32 (ch, 40) = 0x24 | (i << 8);; + } - g2_fifo_wait(); + g2_fifo_wait (); #endif } /* Stop the sound on a given channel */ -void aica_stop(int ch) { - g2_write_32(CHNREGADDR(ch, 0),(g2_read_32(CHNREGADDR(ch, 0)) & ~0x4000) | 0x8000); - g2_fifo_wait(); +void +aica_stop (int ch) +{ + g2_write_32 (CHNREGADDR (ch, 0), + (g2_read_32 (CHNREGADDR (ch, 0)) & ~0x4000) | 0x8000); + g2_fifo_wait (); } /* The rest of these routines can change the channel in mid-stride so you can do things like vibrato and panning effects. */ - + /* Set channel volume */ -void aica_vol(int ch,int vol) { -// g2_write_8(CHNREGADDR(ch, 41),AICA_VOL(vol)); - g2_write_32(CHNREGADDR(ch, 40),(g2_read_32(CHNREGADDR(ch, 40))&0xffff00ff)|(AICA_VOL(vol)<<8) ); - g2_fifo_wait(); +void +aica_vol (int ch, int vol) +{ +// g2_write_8(CHNREGADDR(ch, 41),AICA_VOL(vol)); + g2_write_32 (CHNREGADDR (ch, 40), + (g2_read_32 (CHNREGADDR (ch, 40)) & 0xffff00ff) | + (AICA_VOL (vol) << 8)); + g2_fifo_wait (); } /* Set channel pan */ -void aica_pan(int ch,int pan) { -// g2_write_8(CHNREGADDR(ch, 36),AICA_PAN(pan)); - g2_write_32(CHNREGADDR(ch, 36),(g2_read_32(CHNREGADDR(ch, 36))&0xffffff00)|(AICA_PAN(pan)) ); - g2_fifo_wait(); +void +aica_pan (int ch, int pan) +{ +// g2_write_8(CHNREGADDR(ch, 36),AICA_PAN(pan)); + g2_write_32 (CHNREGADDR (ch, 36), + (g2_read_32 (CHNREGADDR (ch, 36)) & 0xffffff00) | + (AICA_PAN (pan))); + g2_fifo_wait (); } /* Set channel frequency */ -void aica_freq(int ch,int freq) { - g2_write_32(CHNREGADDR(ch, 24),AICA_FREQ(freq)); - g2_fifo_wait(); +void +aica_freq (int ch, int freq) +{ + g2_write_32 (CHNREGADDR (ch, 24), AICA_FREQ (freq)); + g2_fifo_wait (); } /* Get channel position */ -int aica_get_pos(int ch) { +int +aica_get_pos (int ch) +{ #if 1 - /* Observe channel ch */ - g2_write_32(SNDREGADDR(0x280c),(g2_read_32(SNDREGADDR(0x280c))&0xffff00ff) | (ch<<8)); - g2_fifo_wait(); - /* Update position counters */ - return g2_read_32(SNDREGADDR(0x2814)) & 0xffff; + /* Observe channel ch */ + g2_write_32 (SNDREGADDR (0x280c), + (g2_read_32 (SNDREGADDR (0x280c)) & 0xffff00ff) | (ch << 8)); + g2_fifo_wait (); + /* Update position counters */ + return g2_read_32 (SNDREGADDR (0x2814)) & 0xffff; #else - /* Observe channel ch */ - g2_write_8(SNDREGADDR(0x280d),ch); - /* Update position counters */ - return g2_read_32(SNDREGADDR(0x2814)) & 0xffff; + /* Observe channel ch */ + g2_write_8 (SNDREGADDR (0x280d), ch); + /* Update position counters */ + return g2_read_32 (SNDREGADDR (0x2814)) & 0xffff; #endif } + +/* vi: set ts=4 sw=4 expandtab: */