Mercurial > sdl-ios-xcode
comparison src/audio/mint/SDL_mintaudio_stfa.c @ 961:185acc07127a
Date: Fri, 29 Oct 2004 11:47:09 +0200
From: Patrice Mandin
Subject: Reworked audio drivers for Atari platform
These are reworked audio drivers for the Atari platform.
Previous drivers were missing some features:
- Test external clock plugged to DSP port on Atari Falcon 030.
- Ability to select internal or external clock.
So now, I generate a list of frequencies available, with the master clock
and predivisor to use. One big caveat to this: I do not have an external
clock, so I hope it works.
| author | Patrice Mandin <patmandin@gmail.com> |
|---|---|
| date | Fri, 29 Oct 2004 09:56:53 +0000 |
| parents | b8d311d90021 |
| children | 176240cf4405 |
comparison
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| 960:eec28a5278be | 961:185acc07127a |
|---|---|
| 51 | 51 |
| 52 #define MINT_AUDIO_DRIVER_NAME "mint_stfa" | 52 #define MINT_AUDIO_DRIVER_NAME "mint_stfa" |
| 53 | 53 |
| 54 /* Debug print info */ | 54 /* Debug print info */ |
| 55 #define DEBUG_NAME "audio:stfa: " | 55 #define DEBUG_NAME "audio:stfa: " |
| 56 #if 0 | 56 #if 1 |
| 57 #define DEBUG_PRINT(what) \ | 57 #define DEBUG_PRINT(what) \ |
| 58 { \ | 58 { \ |
| 59 printf what; \ | 59 printf what; \ |
| 60 } | 60 } |
| 61 #else | 61 #else |
| 209 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0))); | 209 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0))); |
| 210 DEBUG_PRINT(("channels=%d, ", spec->channels)); | 210 DEBUG_PRINT(("channels=%d, ", spec->channels)); |
| 211 DEBUG_PRINT(("freq=%d\n", spec->freq)); | 211 DEBUG_PRINT(("freq=%d\n", spec->freq)); |
| 212 | 212 |
| 213 /* Check formats available */ | 213 /* Check formats available */ |
| 214 MINTAUDIO_nfreq=16; | 214 MINTAUDIO_freqcount=0; |
| 215 MINTAUDIO_sfreq=0; | 215 for (i=0;i<16;i++) { |
| 216 for (i=MINTAUDIO_sfreq;i<MINTAUDIO_nfreq;i++) { | 216 SDL_MintAudio_AddFrequency(this, freqs[i], 0, i); |
| 217 MINTAUDIO_hardfreq[i]=freqs[15-i]; | 217 } |
| 218 DEBUG_PRINT((DEBUG_NAME "calc:freq(%d)=%lu\n", i, MINTAUDIO_hardfreq[i])); | 218 |
| 219 } | 219 #if 1 |
| 220 | 220 for (i=0; i<MINTAUDIO_freqcount; i++) { |
| 221 MINTAUDIO_numfreq=SDL_MintAudio_SearchFrequency(this, 0, spec->freq); | 221 DEBUG_PRINT((DEBUG_NAME "freq %d: %lu Hz, clock %lu, prediv %d\n", |
| 222 spec->freq=MINTAUDIO_hardfreq[MINTAUDIO_numfreq]; | 222 i, MINTAUDIO_frequencies[i].frequency, MINTAUDIO_frequencies[i].masterclock, |
| 223 MINTAUDIO_frequencies[i].predivisor | |
| 224 )); | |
| 225 } | |
| 226 #endif | |
| 227 | |
| 228 MINTAUDIO_numfreq=SDL_MintAudio_SearchFrequency(this, spec->freq); | |
| 229 spec->freq=MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency; | |
| 223 | 230 |
| 224 DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ",spec->format & 0x00ff)); | 231 DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ",spec->format & 0x00ff)); |
| 225 DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0))); | 232 DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0))); |
| 226 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0))); | 233 DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0))); |
| 227 DEBUG_PRINT(("channels=%d, ", spec->channels)); | 234 DEBUG_PRINT(("channels=%d, ", spec->channels)); |
| 241 | 248 |
| 242 /* Stop replay */ | 249 /* Stop replay */ |
| 243 cookie_stfa->sound_enable=STFA_PLAY_DISABLE; | 250 cookie_stfa->sound_enable=STFA_PLAY_DISABLE; |
| 244 | 251 |
| 245 /* Select replay format */ | 252 /* Select replay format */ |
| 246 cookie_stfa->sound_control = 15-MINTAUDIO_numfreq; | 253 cookie_stfa->sound_control = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor; |
| 247 if ((spec->format & 0xff)==8) { | 254 if ((spec->format & 0xff)==8) { |
| 248 cookie_stfa->sound_control |= STFA_FORMAT_8BIT; | 255 cookie_stfa->sound_control |= STFA_FORMAT_8BIT; |
| 249 } else { | 256 } else { |
| 250 cookie_stfa->sound_control |= STFA_FORMAT_16BIT; | 257 cookie_stfa->sound_control |= STFA_FORMAT_16BIT; |
| 251 } | 258 } |