Mercurial > sdl-ios-xcode
diff src/audio/mint/SDL_mintaudio_mcsn.c @ 1895:c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Mon, 10 Jul 2006 21:04:37 +0000 |
parents | a8181c4040b8 |
children | 45af7d69f8eb |
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line diff
--- a/src/audio/mint/SDL_mintaudio_mcsn.c Thu Jul 06 18:01:37 2006 +0000 +++ b/src/audio/mint/SDL_mintaudio_mcsn.c Mon Jul 10 21:04:37 2006 +0000 @@ -67,332 +67,352 @@ /*--- Audio driver functions ---*/ static void Mint_CloseAudio(_THIS); -static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec); +static int Mint_OpenAudio(_THIS, SDL_AudioSpec * spec); static void Mint_LockAudio(_THIS); static void Mint_UnlockAudio(_THIS); /* To check/init hardware audio */ -static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec); -static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec); +static int Mint_CheckAudio(_THIS, SDL_AudioSpec * spec); +static void Mint_InitAudio(_THIS, SDL_AudioSpec * spec); /*--- Audio driver bootstrap functions ---*/ -static int Audio_Available(void) +static int +Audio_Available(void) { - unsigned long dummy; - const char *envr = SDL_getenv("SDL_AUDIODRIVER"); + unsigned long dummy; + const char *envr = SDL_getenv("SDL_AUDIODRIVER"); - SDL_MintAudio_mint_present = (Getcookie(C_MiNT, &dummy) == C_FOUND); + SDL_MintAudio_mint_present = (Getcookie(C_MiNT, &dummy) == C_FOUND); - /* We can't use XBIOS in interrupt with Magic, don't know about thread */ - if (Getcookie(C_MagX, &dummy) == C_FOUND) { - return(0); - } + /* We can't use XBIOS in interrupt with Magic, don't know about thread */ + if (Getcookie(C_MagX, &dummy) == C_FOUND) { + return (0); + } - /* Check if user asked a different audio driver */ - if ((envr) && (SDL_strcmp(envr, MINT_AUDIO_DRIVER_NAME)!=0)) { - DEBUG_PRINT((DEBUG_NAME "user asked a different audio driver\n")); - return(0); - } + /* Check if user asked a different audio driver */ + if ((envr) && (SDL_strcmp(envr, MINT_AUDIO_DRIVER_NAME) != 0)) { + DEBUG_PRINT((DEBUG_NAME "user asked a different audio driver\n")); + return (0); + } - /* Cookie _MCH present ? if not, assume ST machine */ - if (Getcookie(C__MCH, &cookie_mch) == C_NOTFOUND) { - cookie_mch = MCH_ST; - } + /* Cookie _MCH present ? if not, assume ST machine */ + if (Getcookie(C__MCH, &cookie_mch) == C_NOTFOUND) { + cookie_mch = MCH_ST; + } - /* Cookie _SND present ? if not, assume ST machine */ - if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) { - cookie_snd = SND_PSG; - } + /* Cookie _SND present ? if not, assume ST machine */ + if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) { + cookie_snd = SND_PSG; + } - /* Check if we have 16 bits audio */ - if ((cookie_snd & SND_16BIT)==0) { - DEBUG_PRINT((DEBUG_NAME "no 16 bits sound\n")); - return(0); - } + /* Check if we have 16 bits audio */ + if ((cookie_snd & SND_16BIT) == 0) { + DEBUG_PRINT((DEBUG_NAME "no 16 bits sound\n")); + return (0); + } - /* Cookie MCSN present ? */ - if (Getcookie(C_McSn, (long *) &cookie_mcsn) != C_FOUND) { - DEBUG_PRINT((DEBUG_NAME "no MCSN audio\n")); - return(0); - } + /* Cookie MCSN present ? */ + if (Getcookie(C_McSn, (long *) &cookie_mcsn) != C_FOUND) { + DEBUG_PRINT((DEBUG_NAME "no MCSN audio\n")); + return (0); + } - /* Check if interrupt at end of replay */ - if (cookie_mcsn->pint == 0) { - DEBUG_PRINT((DEBUG_NAME "no interrupt at end of replay\n")); - return(0); - } + /* Check if interrupt at end of replay */ + if (cookie_mcsn->pint == 0) { + DEBUG_PRINT((DEBUG_NAME "no interrupt at end of replay\n")); + return (0); + } - /* Check if audio is lockable */ - if (Locksnd()!=1) { - DEBUG_PRINT((DEBUG_NAME "audio locked by other application\n")); - return(0); - } + /* Check if audio is lockable */ + if (Locksnd() != 1) { + DEBUG_PRINT((DEBUG_NAME "audio locked by other application\n")); + return (0); + } - Unlocksnd(); + Unlocksnd(); - DEBUG_PRINT((DEBUG_NAME "MCSN audio available!\n")); - return(1); + DEBUG_PRINT((DEBUG_NAME "MCSN audio available!\n")); + return (1); } -static void Audio_DeleteDevice(SDL_AudioDevice *device) +static void +Audio_DeleteDevice(SDL_AudioDevice * device) { SDL_free(device->hidden); SDL_free(device); } -static SDL_AudioDevice *Audio_CreateDevice(int devindex) +static SDL_AudioDevice * +Audio_CreateDevice(int devindex) { - SDL_AudioDevice *this; + SDL_AudioDevice *this; - /* Initialize all variables that we clean on shutdown */ - this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); - if ( this ) { + /* Initialize all variables that we clean on shutdown */ + this = (SDL_AudioDevice *) SDL_malloc(sizeof(SDL_AudioDevice)); + if (this) { SDL_memset(this, 0, (sizeof *this)); this->hidden = (struct SDL_PrivateAudioData *) - SDL_malloc((sizeof *this->hidden)); + SDL_malloc((sizeof *this->hidden)); } - if ( (this == NULL) || (this->hidden == NULL) ) { + if ((this == NULL) || (this->hidden == NULL)) { SDL_OutOfMemory(); - if ( this ) { + if (this) { SDL_free(this); } - return(0); + return (0); } SDL_memset(this->hidden, 0, (sizeof *this->hidden)); /* Set the function pointers */ - this->OpenAudio = Mint_OpenAudio; - this->CloseAudio = Mint_CloseAudio; - this->LockAudio = Mint_LockAudio; + this->OpenAudio = Mint_OpenAudio; + this->CloseAudio = Mint_CloseAudio; + this->LockAudio = Mint_LockAudio; this->UnlockAudio = Mint_UnlockAudio; - this->free = Audio_DeleteDevice; + this->free = Audio_DeleteDevice; return this; } AudioBootStrap MINTAUDIO_MCSN_bootstrap = { - MINT_AUDIO_DRIVER_NAME, "MiNT MCSN audio driver", - Audio_Available, Audio_CreateDevice + MINT_AUDIO_DRIVER_NAME, "MiNT MCSN audio driver", + Audio_Available, Audio_CreateDevice }; -static void Mint_LockAudio(_THIS) +static void +Mint_LockAudio(_THIS) { - /* Stop replay */ - Buffoper(0); + /* Stop replay */ + Buffoper(0); } -static void Mint_UnlockAudio(_THIS) +static void +Mint_UnlockAudio(_THIS) { - /* Restart replay */ - Buffoper(SB_PLA_ENA|SB_PLA_RPT); + /* Restart replay */ + Buffoper(SB_PLA_ENA | SB_PLA_RPT); } -static void Mint_CloseAudio(_THIS) +static void +Mint_CloseAudio(_THIS) { - /* Stop replay */ - SDL_MintAudio_WaitThread(); - Buffoper(0); + /* Stop replay */ + SDL_MintAudio_WaitThread(); + Buffoper(0); - if (!SDL_MintAudio_mint_present) { - /* Uninstall interrupt */ - Jdisint(MFP_DMASOUND); - } + if (!SDL_MintAudio_mint_present) { + /* Uninstall interrupt */ + Jdisint(MFP_DMASOUND); + } - /* Wait if currently playing sound */ - while (SDL_MintAudio_mutex != 0) { - } + /* Wait if currently playing sound */ + while (SDL_MintAudio_mutex != 0) { + } - /* Clear buffers */ - if (SDL_MintAudio_audiobuf[0]) { - Mfree(SDL_MintAudio_audiobuf[0]); - SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL; - } + /* Clear buffers */ + if (SDL_MintAudio_audiobuf[0]) { + Mfree(SDL_MintAudio_audiobuf[0]); + SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL; + } - /* Unlock sound system */ - Unlocksnd(); + /* Unlock sound system */ + Unlocksnd(); } -static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec) +static int +Mint_CheckAudio(_THIS, SDL_AudioSpec * spec) { - int i; - unsigned long masterclock, masterprediv; + int i; + unsigned long masterclock, masterprediv; - DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ",spec->format & 0x00ff)); - DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0))); - DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0))); - DEBUG_PRINT(("channels=%d, ", spec->channels)); - DEBUG_PRINT(("freq=%d\n", spec->freq)); + DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ", spec->format & 0x00ff)); + DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000) != 0))); + DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000) != 0))); + DEBUG_PRINT(("channels=%d, ", spec->channels)); + DEBUG_PRINT(("freq=%d\n", spec->freq)); - /* Check formats available */ - MINTAUDIO_freqcount=0; - switch(cookie_mcsn->play) { - case MCSN_ST: - spec->channels=1; - spec->format=8; /* FIXME: is it signed or unsigned ? */ - SDL_MintAudio_AddFrequency(this, 12500, 0, 0, -1); - break; - case MCSN_TT: /* Also STE, Mega STE */ - spec->format=AUDIO_S8; - masterclock=MASTERCLOCK_STE; - masterprediv=MASTERPREDIV_STE; - if ((cookie_mch>>16)==MCH_TT) { - masterclock=MASTERCLOCK_TT; - masterprediv=MASTERPREDIV_TT; - } - for (i=0; i<4; i++) { - SDL_MintAudio_AddFrequency(this, masterclock/(masterprediv*(1<<i)), - masterclock, 3-i, -1); - } - break; - case MCSN_FALCON: /* Also Mac */ - for (i=1; i<12; i++) { - /* Remove unusable Falcon codec predivisors */ - if ((i==6) || (i==8) || (i==10)) { - continue; - } - SDL_MintAudio_AddFrequency(this, MASTERCLOCK_FALCON1/(MASTERPREDIV_FALCON*(i+1)), - CLK25M, i+1, -1); - } - if (cookie_mcsn->res1 != 0) { - for (i=1; i<4; i++) { - SDL_MintAudio_AddFrequency(this, (cookie_mcsn->res1)/(MASTERPREDIV_FALCON*(1<<i)), - CLKEXT, (1<<i)-1, -1); - } - } - spec->format |= 0x8000; /* Audio is always signed */ - if ((spec->format & 0x00ff)==16) { - spec->format |= 0x1000; /* Audio is always big endian */ - spec->channels=2; /* 16 bits always stereo */ - } - break; - } + /* Check formats available */ + MINTAUDIO_freqcount = 0; + switch (cookie_mcsn->play) { + case MCSN_ST: + spec->channels = 1; + spec->format = 8; /* FIXME: is it signed or unsigned ? */ + SDL_MintAudio_AddFrequency(this, 12500, 0, 0, -1); + break; + case MCSN_TT: /* Also STE, Mega STE */ + spec->format = AUDIO_S8; + masterclock = MASTERCLOCK_STE; + masterprediv = MASTERPREDIV_STE; + if ((cookie_mch >> 16) == MCH_TT) { + masterclock = MASTERCLOCK_TT; + masterprediv = MASTERPREDIV_TT; + } + for (i = 0; i < 4; i++) { + SDL_MintAudio_AddFrequency(this, + masterclock / (masterprediv * + (1 << i)), + masterclock, 3 - i, -1); + } + break; + case MCSN_FALCON: /* Also Mac */ + for (i = 1; i < 12; i++) { + /* Remove unusable Falcon codec predivisors */ + if ((i == 6) || (i == 8) || (i == 10)) { + continue; + } + SDL_MintAudio_AddFrequency(this, + MASTERCLOCK_FALCON1 / + (MASTERPREDIV_FALCON * (i + 1)), + CLK25M, i + 1, -1); + } + if (cookie_mcsn->res1 != 0) { + for (i = 1; i < 4; i++) { + SDL_MintAudio_AddFrequency(this, + (cookie_mcsn->res1) / + (MASTERPREDIV_FALCON * + (1 << i)), CLKEXT, + (1 << i) - 1, -1); + } + } + spec->format |= 0x8000; /* Audio is always signed */ + if ((spec->format & 0x00ff) == 16) { + spec->format |= 0x1000; /* Audio is always big endian */ + spec->channels = 2; /* 16 bits always stereo */ + } + break; + } #if 1 - for (i=0; i<MINTAUDIO_freqcount; i++) { - DEBUG_PRINT((DEBUG_NAME "freq %d: %lu Hz, clock %lu, prediv %d\n", - i, MINTAUDIO_frequencies[i].frequency, MINTAUDIO_frequencies[i].masterclock, - MINTAUDIO_frequencies[i].predivisor - )); - } + for (i = 0; i < MINTAUDIO_freqcount; i++) { + DEBUG_PRINT((DEBUG_NAME "freq %d: %lu Hz, clock %lu, prediv %d\n", + i, MINTAUDIO_frequencies[i].frequency, + MINTAUDIO_frequencies[i].masterclock, + MINTAUDIO_frequencies[i].predivisor)); + } #endif - MINTAUDIO_numfreq=SDL_MintAudio_SearchFrequency(this, spec->freq); - spec->freq=MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency; + MINTAUDIO_numfreq = SDL_MintAudio_SearchFrequency(this, spec->freq); + spec->freq = MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency; - DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ",spec->format & 0x00ff)); - DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0))); - DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0))); - DEBUG_PRINT(("channels=%d, ", spec->channels)); - DEBUG_PRINT(("freq=%d\n", spec->freq)); + DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ", spec->format & 0x00ff)); + DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000) != 0))); + DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000) != 0))); + DEBUG_PRINT(("channels=%d, ", spec->channels)); + DEBUG_PRINT(("freq=%d\n", spec->freq)); - return 0; + return 0; } -static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec) +static void +Mint_InitAudio(_THIS, SDL_AudioSpec * spec) { - int channels_mode, prediv, dmaclock; - void *buffer; + int channels_mode, prediv, dmaclock; + void *buffer; - /* Stop currently playing sound */ - SDL_MintAudio_quit_thread = SDL_FALSE; - SDL_MintAudio_thread_finished = SDL_TRUE; - SDL_MintAudio_WaitThread(); - Buffoper(0); - - /* Set replay tracks */ - Settracks(0,0); - Setmontracks(0); + /* Stop currently playing sound */ + SDL_MintAudio_quit_thread = SDL_FALSE; + SDL_MintAudio_thread_finished = SDL_TRUE; + SDL_MintAudio_WaitThread(); + Buffoper(0); - /* Select replay format */ - channels_mode=STEREO16; - switch (spec->format & 0xff) { - case 8: - if (spec->channels==2) { - channels_mode=STEREO8; - } else { - channels_mode=MONO8; - } - break; - } - if (Setmode(channels_mode)<0) { - DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n")); - } + /* Set replay tracks */ + Settracks(0, 0); + Setmontracks(0); + + /* Select replay format */ + channels_mode = STEREO16; + switch (spec->format & 0xff) { + case 8: + if (spec->channels == 2) { + channels_mode = STEREO8; + } else { + channels_mode = MONO8; + } + break; + } + if (Setmode(channels_mode) < 0) { + DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n")); + } - dmaclock = MINTAUDIO_frequencies[MINTAUDIO_numfreq].masterclock; - prediv = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor; - switch(cookie_mcsn->play) { - case MCSN_TT: - Devconnect(DMAPLAY, DAC, CLK25M, CLKOLD, 1); - Soundcmd(SETPRESCALE, prediv); - DEBUG_PRINT((DEBUG_NAME "STE/TT prescaler selected\n")); - break; - case MCSN_FALCON: - Devconnect(DMAPLAY, DAC, dmaclock, prediv, 1); - DEBUG_PRINT((DEBUG_NAME "Falcon prescaler selected\n")); - break; - } + dmaclock = MINTAUDIO_frequencies[MINTAUDIO_numfreq].masterclock; + prediv = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor; + switch (cookie_mcsn->play) { + case MCSN_TT: + Devconnect(DMAPLAY, DAC, CLK25M, CLKOLD, 1); + Soundcmd(SETPRESCALE, prediv); + DEBUG_PRINT((DEBUG_NAME "STE/TT prescaler selected\n")); + break; + case MCSN_FALCON: + Devconnect(DMAPLAY, DAC, dmaclock, prediv, 1); + DEBUG_PRINT((DEBUG_NAME "Falcon prescaler selected\n")); + break; + } - /* Set buffer */ - buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf]; - if (Setbuffer(0, buffer, buffer + spec->size)<0) { - DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n")); - } - - if (SDL_MintAudio_mint_present) { - SDL_MintAudio_thread_pid = tfork(SDL_MintAudio_Thread, 0); - } else { - /* Install interrupt */ - Jdisint(MFP_DMASOUND); - Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_XbiosInterrupt); - Jenabint(MFP_DMASOUND); + /* Set buffer */ + buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf]; + if (Setbuffer(0, buffer, buffer + spec->size) < 0) { + DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n")); + } - if (Setinterrupt(SI_TIMERA, SI_PLAY)<0) { - DEBUG_PRINT((DEBUG_NAME "Setinterrupt() failed\n")); - } - } + if (SDL_MintAudio_mint_present) { + SDL_MintAudio_thread_pid = tfork(SDL_MintAudio_Thread, 0); + } else { + /* Install interrupt */ + Jdisint(MFP_DMASOUND); + Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_XbiosInterrupt); + Jenabint(MFP_DMASOUND); - /* Go */ - Buffoper(SB_PLA_ENA|SB_PLA_RPT); - DEBUG_PRINT((DEBUG_NAME "hardware initialized\n")); + if (Setinterrupt(SI_TIMERA, SI_PLAY) < 0) { + DEBUG_PRINT((DEBUG_NAME "Setinterrupt() failed\n")); + } + } + + /* Go */ + Buffoper(SB_PLA_ENA | SB_PLA_RPT); + DEBUG_PRINT((DEBUG_NAME "hardware initialized\n")); } -static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec) +static int +Mint_OpenAudio(_THIS, SDL_AudioSpec * spec) { - /* Lock sound system */ - if (Locksnd()!=1) { - SDL_SetError("Mint_OpenAudio: Audio system already in use"); - return(-1); - } - - SDL_MintAudio_device = this; + /* Lock sound system */ + if (Locksnd() != 1) { + SDL_SetError("Mint_OpenAudio: Audio system already in use"); + return (-1); + } - /* Check audio capabilities */ - if (Mint_CheckAudio(this, spec)==-1) { - return -1; - } + SDL_MintAudio_device = this; - SDL_CalculateAudioSpec(spec); + /* Check audio capabilities */ + if (Mint_CheckAudio(this, spec) == -1) { + return -1; + } - /* Allocate memory for audio buffers in DMA-able RAM */ - DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", spec->size)); + SDL_CalculateAudioSpec(spec); + + /* Allocate memory for audio buffers in DMA-able RAM */ + DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", spec->size)); - SDL_MintAudio_audiobuf[0] = Atari_SysMalloc(spec->size *2, MX_STRAM); - if (SDL_MintAudio_audiobuf[0]==NULL) { - SDL_SetError("MINT_OpenAudio: Not enough memory for audio buffer"); - return (-1); - } - SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + spec->size ; - SDL_MintAudio_numbuf=0; - SDL_memset(SDL_MintAudio_audiobuf[0], spec->silence, spec->size *2); - SDL_MintAudio_audiosize = spec->size; - SDL_MintAudio_mutex = 0; + SDL_MintAudio_audiobuf[0] = Atari_SysMalloc(spec->size * 2, MX_STRAM); + if (SDL_MintAudio_audiobuf[0] == NULL) { + SDL_SetError("MINT_OpenAudio: Not enough memory for audio buffer"); + return (-1); + } + SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + spec->size; + SDL_MintAudio_numbuf = 0; + SDL_memset(SDL_MintAudio_audiobuf[0], spec->silence, spec->size * 2); + SDL_MintAudio_audiosize = spec->size; + SDL_MintAudio_mutex = 0; - DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n", SDL_MintAudio_audiobuf[0])); - DEBUG_PRINT((DEBUG_NAME "buffer 1 at 0x%08x\n", SDL_MintAudio_audiobuf[1])); + DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n", + SDL_MintAudio_audiobuf[0])); + DEBUG_PRINT((DEBUG_NAME "buffer 1 at 0x%08x\n", + SDL_MintAudio_audiobuf[1])); - /* Setup audio hardware */ - Mint_InitAudio(this, spec); + /* Setup audio hardware */ + Mint_InitAudio(this, spec); - return(1); /* We don't use SDL threaded audio */ + return (1); /* We don't use SDL threaded audio */ } + +/* vi: set ts=4 sw=4 expandtab: */