Mercurial > sdl-ios-xcode
diff src/audio/mint/SDL_mintaudio_xbios.c @ 3820:1f156fd874fa SDL-ryan-multiple-audio-device
Moved more audio drivers to 1.3 API (all 5 MiNT backends, BSD, IRIX...), and
some other tweaks in already-converted drivers.
author | Ryan C. Gordon <icculus@icculus.org> |
---|---|
date | Sat, 07 Oct 2006 05:36:36 +0000 |
parents | c8b3d3d13ed1 |
children | 66fb40445587 |
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--- a/src/audio/mint/SDL_mintaudio_xbios.c Fri Oct 06 20:36:23 2006 +0000 +++ b/src/audio/mint/SDL_mintaudio_xbios.c Sat Oct 07 05:36:36 2006 +0000 @@ -60,29 +60,12 @@ #define DEBUG_PRINT(what) #endif -/*--- Static variables ---*/ - -static unsigned long cookie_snd; - -/*--- Audio driver functions ---*/ - -static void Mint_CloseAudio(_THIS); -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); - -/*--- Audio driver bootstrap functions ---*/ +static unsigned long cookie_snd = 0; static int -Audio_Available(void) +MINTXBIOS_Available(void) { - unsigned long dummy; - const char *envr = SDL_getenv("SDL_AUDIODRIVER"); - + unsigned long dummy = 0; /*SDL_MintAudio_mint_present = (Getcookie(C_MiNT, &dummy) == C_FOUND); */ SDL_MintAudio_mint_present = SDL_FALSE; @@ -91,12 +74,6 @@ 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 _SND present ? if not, assume ST machine */ if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) { cookie_snd = SND_PSG; @@ -121,91 +98,47 @@ } static void -Audio_DeleteDevice(SDL_AudioDevice * device) -{ - SDL_free(device->hidden); - SDL_free(device); -} - -static SDL_AudioDevice * -Audio_CreateDevice(int devindex) -{ - SDL_AudioDevice *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)); - } - if ((this == NULL) || (this->hidden == NULL)) { - SDL_OutOfMemory(); - if (this) { - SDL_free(this); - } - 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->UnlockAudio = Mint_UnlockAudio; - this->free = Audio_DeleteDevice; - - /* Uses interrupt driven audio, without thread */ - #if SDL_THREADS_DISABLED - this->SkipMixerLock = 1; - #endif - - return this; -} - -AudioBootStrap MINTAUDIO_XBIOS_bootstrap = { - MINT_AUDIO_DRIVER_NAME, "MiNT XBIOS audio driver", - Audio_Available, Audio_CreateDevice, 0 -}; - -static void -Mint_LockAudio(_THIS) +MINTXBIOS_LockDevice(_THIS) { /* Stop replay */ Buffoper(0); } static void -Mint_UnlockAudio(_THIS) +MINTXBIOS_UnlockDevice(_THIS) { /* Restart replay */ Buffoper(SB_PLA_ENA | SB_PLA_RPT); } static void -Mint_CloseAudio(_THIS) +MINTXBIOS_CloseDevice(_THIS) { - /* Stop replay */ - SDL_MintAudio_WaitThread(); - Buffoper(0); + if (this->hidden != NULL) { + /* 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(); + + SDL_free(this->hidden); + this->hidden = NULL; } - - /* Unlock sound system */ - Unlocksnd(); } /* Falcon XBIOS implementation of Devconnect() is buggy with external clock */ @@ -274,7 +207,7 @@ } static void -Mint_CheckExternalClock(_THIS) +MINTXBIOS_CheckExternalClock(_THIS) { #define SIZE_BUF_CLOCK_MEASURE (44100/10) @@ -360,33 +293,33 @@ } static int -Mint_CheckAudio(_THIS, SDL_AudioSpec * spec) +MINTXBIOS_CheckAudio(_THIS) { int i; Uint32 extclock; DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ", - SDL_AUDIO_BITSIZE(spec->format))); - DEBUG_PRINT(("float=%d, ", SDL_AUDIO_ISFLOAT(spec->format))); - DEBUG_PRINT(("signed=%d, ", SDL_AUDIO_ISSIGNED(spec->format))); - DEBUG_PRINT(("big endian=%d, ", SDL_AUDIO_ISBIGENDIAN(spec->format))); - DEBUG_PRINT(("channels=%d, ", spec->channels)); - DEBUG_PRINT(("freq=%d\n", spec->freq)); + SDL_AUDIO_BITSIZE(this->spec.format))); + DEBUG_PRINT(("float=%d, ", SDL_AUDIO_ISFLOAT(this->spec.format))); + DEBUG_PRINT(("signed=%d, ", SDL_AUDIO_ISSIGNED(this->spec.format))); + DEBUG_PRINT(("big endian=%d, ", SDL_AUDIO_ISBIGENDIAN(this->spec.format))); + DEBUG_PRINT(("channels=%d, ", this->spec.channels)); + DEBUG_PRINT(("freq=%d\n", this->spec.freq)); - spec->format |= SDL_AUDIO_MASK_SIGNED; /* Audio is always signed */ + this->spec.format |= SDL_AUDIO_MASK_SIGNED; /* Audio is always signed */ /* clamp out int32/float32 */ - if (SDL_AUDIO_BITSIZE(spec->format) >= 16) { - spec->format = AUDIO_S16MSB; /* Audio is always big endian */ - spec->channels = 2; /* 16 bits always stereo */ - } else if (spec->channels > 2) { - spec->channels = 2; /* no more than stereo! */ + if (SDL_AUDIO_BITSIZE(this->spec.format) >= 16) { + this->spec.format = AUDIO_S16MSB; /* Audio is always big endian */ + this->spec.channels = 2; /* 16 bits always stereo */ + } else if (this->spec.channels > 2) { + this->spec.channels = 2; /* no more than stereo! */ } MINTAUDIO_freqcount = 0; /* Add external clocks if present */ - Mint_CheckExternalClock(this); + MINTXBIOS_CheckExternalClock(this); /* Standard clocks */ for (i = 1; i < 12; i++) { @@ -409,22 +342,22 @@ } #endif - MINTAUDIO_numfreq = SDL_MintAudio_SearchFrequency(this, spec->freq); - spec->freq = MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency; + MINTAUDIO_numfreq = SDL_MintAudio_SearchFrequency(this, this->spec.freq); + this->spec.freq = MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency; DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ", - SDL_AUDIO_BITSIZE(spec->format))); - DEBUG_PRINT(("float=%d, ", SDL_AUDIO_ISFLOAT(spec->format))); - DEBUG_PRINT(("signed=%d, ", SDL_AUDIO_ISSIGNED(spec->format))); - DEBUG_PRINT(("big endian=%d, ", SDL_AUDIO_ISBIGENDIAN(spec->format))); - DEBUG_PRINT(("channels=%d, ", spec->channels)); - DEBUG_PRINT(("freq=%d\n", spec->freq)); + SDL_AUDIO_BITSIZE(this->spec.format))); + DEBUG_PRINT(("float=%d, ", SDL_AUDIO_ISFLOAT(this->spec.format))); + DEBUG_PRINT(("signed=%d, ", SDL_AUDIO_ISSIGNED(this->spec.format))); + DEBUG_PRINT(("big endian=%d, ", SDL_AUDIO_ISBIGENDIAN(this->spec.format))); + DEBUG_PRINT(("channels=%d, ", this->spec.channels)); + DEBUG_PRINT(("freq=%d\n", this->spec.freq)); return 0; } static void -Mint_InitAudio(_THIS, SDL_AudioSpec * spec) +MINTXBIOS_InitAudio(_THIS) { int channels_mode, dmaclock, prediv; void *buffer; @@ -441,9 +374,9 @@ /* Select replay format */ channels_mode = STEREO16; - switch (SDL_AUDIO_BITSIZE(spec->format)) { + switch (SDL_AUDIO_BITSIZE(this->spec.format)) { case 8: - if (spec->channels == 2) { + if (this->spec.channels == 2) { channels_mode = STEREO8; } else { channels_mode = MONO8; @@ -466,7 +399,7 @@ /* Set buffer */ buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf]; - if (Setbuffer(0, buffer, buffer + spec->size) < 0) { + if (Setbuffer(0, buffer, buffer + this->spec.size) < 0) { DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n")); } @@ -490,35 +423,46 @@ } static int -Mint_OpenAudio(_THIS, SDL_AudioSpec * spec) +MINTXBIOS_OpenDevice(_THIS, const char *devname, int iscapture) { /* Lock sound system */ if (Locksnd() != 1) { - SDL_SetError("Mint_OpenAudio: Audio system already in use"); - return (-1); + SDL_SetError("MINTXBIOS_OpenAudio: Audio system already in use"); + return 0; } SDL_MintAudio_device = this; /* Check audio capabilities */ - if (Mint_CheckAudio(this, spec) == -1) { - return -1; + if (MINTXBIOS_CheckAudio(this) == -1) { + return 0; } - SDL_CalculateAudioSpec(spec); + /* Initialize all variables that we clean on shutdown */ + this->hidden = (struct SDL_PrivateAudioData *) + SDL_malloc((sizeof *this->hidden)); + if (this->hidden == NULL) { + SDL_OutOfMemory(); + return 0; + } + SDL_memset(this->hidden, 0, (sizeof *this->hidden)); + + SDL_CalculateAudioSpec(&this->spec); /* Allocate memory for audio buffers in DMA-able RAM */ - DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", spec->size)); + DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", this->spec.size)); - SDL_MintAudio_audiobuf[0] = Atari_SysMalloc(spec->size * 2, MX_STRAM); + SDL_MintAudio_audiobuf[0] = Atari_SysMalloc(this->spec.size * 2, MX_STRAM); if (SDL_MintAudio_audiobuf[0] == NULL) { - SDL_SetError("MINT_OpenAudio: Not enough memory for audio buffer"); - return (-1); + SDL_free(this->hidden); + this->hidden = NULL; + SDL_OutOfMemory(); + return 0; } - SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + spec->size; + SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + this->spec.size; SDL_MintAudio_numbuf = 0; - SDL_memset(SDL_MintAudio_audiobuf[0], spec->silence, spec->size * 2); - SDL_MintAudio_audiosize = spec->size; + SDL_memset(SDL_MintAudio_audiobuf[0],this->spec.silence,this->spec.size*2); + SDL_MintAudio_audiosize = this->spec.size; SDL_MintAudio_mutex = 0; DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n", @@ -529,9 +473,29 @@ SDL_MintAudio_CheckFpu(); /* Setup audio hardware */ - Mint_InitAudio(this, spec); + MINTXBIOS_InitAudio(this); - return (1); /* We don't use SDL threaded audio */ + return 1; /* good to go. */ } +static int +MINTXBIOS_Init(SDL_AudioDriverImpl *impl) +{ + /* Set the function pointers */ + impl->OpenDevice = MINTXBIOS_OpenDevice; + impl->CloseDevice = MINTXBIOS_CloseDevice; + impl->LockAudio = MINTXBIOS_LockAudio; + impl->UnlockAudio = MINTXBIOS_UnlockAudio; + impl->OnlyHasDefaultOutputDevice = 1; + impl->ProvidesOwnCallbackThread = 1; + impl->SkipMixerLock = 1; + + return 1; +} + +AudioBootStrap MINTAUDIO_XBIOS_bootstrap = { + MINT_AUDIO_DRIVER_NAME, "MiNT XBIOS audio driver", + MINTXBIOS_Available, MINTXBIOS_Init, 0 +}; + /* vi: set ts=4 sw=4 expandtab: */