Mercurial > sdl-ios-xcode
view src/audio/dmedia/SDL_irixaudio.c @ 3468:789b97008d8a
My first OpenGL shader! Momma will be so proud!
This shader implements the software renderer mask semantics where the source pixel is multiplied by the color and alpha modulation values and then any pixel with non-zero alpha is fully opaque.
The OpenGL renderer on Mac OS X now passes all the automated render tests! :)
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sat, 21 Nov 2009 05:29:31 +0000 |
parents | 99210400e8b9 |
children | f7b03b6838cb |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2009 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA Sam Lantinga slouken@libsdl.org */ #include <errno.h> #include "SDL_config.h" /* Allow access to a raw mixing buffer (For IRIX 6.5 and higher) */ /* patch for IRIX 5 by Georg Schwarz 18/07/2004 */ #include "SDL_timer.h" #include "SDL_audio.h" #include "../SDL_audiomem.h" #include "../SDL_audio_c.h" #include "SDL_irixaudio.h" #ifndef AL_RESOURCE /* as a test whether we use the old IRIX audio libraries */ #define OLD_IRIX_AUDIO #define alClosePort(x) ALcloseport(x) #define alFreeConfig(x) ALfreeconfig(x) #define alGetFillable(x) ALgetfillable(x) #define alNewConfig() ALnewconfig() #define alOpenPort(x,y,z) ALopenport(x,y,z) #define alSetChannels(x,y) ALsetchannels(x,y) #define alSetQueueSize(x,y) ALsetqueuesize(x,y) #define alSetSampFmt(x,y) ALsetsampfmt(x,y) #define alSetWidth(x,y) ALsetwidth(x,y) #endif void static IRIXAUDIO_WaitDevice(_THIS) { Sint32 timeleft; timeleft = this->spec.samples - alGetFillable(this->hidden->audio_port); if (timeleft > 0) { timeleft /= (this->spec.freq / 1000); SDL_Delay((Uint32) timeleft); } } static void IRIXAUDIO_PlayDevice(_THIS) { /* Write the audio data out */ ALport port = this->hidden->audio_port; Uint8 *mixbuf = this->hidden->mixbuf; if (alWriteFrames(port, mixbuf, this->spec.samples) < 0) { /* Assume fatal error, for now */ this->enabled = 0; } } static Uint8 * IRIXAUDIO_GetDeviceBuf(_THIS) { return (this->hidden->mixbuf); } static void IRIXAUDIO_CloseDevice(_THIS) { if (this->hidden != NULL) { if (this->hidden->mixbuf != NULL) { SDL_FreeAudioMem(this->hidden->mixbuf); this->hidden->mixbuf = NULL; } if (this->hidden->audio_port != NULL) { alClosePort(this->hidden->audio_port); this->hidden->audio_port = NULL; } SDL_free(this->hidden); this->hidden = NULL; } } static int IRIXAUDIO_OpenDevice(_THIS, const char *devname, int iscapture) { SDL_AudioFormat test_format = SDL_FirstAudioFormat(this->spec.format); long width = 0; long fmt = 0; int valid = 0; /* !!! FIXME: Handle multiple devices and capture? */ /* 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)); #ifdef OLD_IRIX_AUDIO { long audio_param[2]; audio_param[0] = AL_OUTPUT_RATE; audio_param[1] = this->spec.freq; valid = (ALsetparams(AL_DEFAULT_DEVICE, audio_param, 2) < 0); } #else { ALpv audio_param; audio_param.param = AL_RATE; audio_param.value.i = this->spec.freq; valid = (alSetParams(AL_DEFAULT_OUTPUT, &audio_param, 1) < 0); } #endif while ((!valid) && (test_format)) { valid = 1; this->spec.format = test_format; switch (test_format) { case AUDIO_S8: width = AL_SAMPLE_8; fmt = AL_SAMPFMT_TWOSCOMP; break; case AUDIO_S16SYS: width = AL_SAMPLE_16; fmt = AL_SAMPFMT_TWOSCOMP; break; case AUDIO_F32SYS: width = 0; /* not used here... */ fmt = AL_SAMPFMT_FLOAT; break; /* Docs say there is int24, but not int32.... */ default: valid = 0; test_format = SDL_NextAudioFormat(); break; } if (valid) { ALconfig audio_config = alNewConfig(); valid = 0; if (audio_config) { if (alSetChannels(audio_config, this->spec.channels) < 0) { if (this->spec.channels > 2) { /* can't handle > stereo? */ this->spec.channels = 2; /* try again below. */ } } if ((alSetSampFmt(audio_config, fmt) >= 0) && ((!width) || (alSetWidth(audio_config, width) >= 0)) && (alSetQueueSize(audio_config, this->spec.samples * 2) >= 0) && (alSetChannels(audio_config, this->spec.channels) >= 0)) { this->hidden->audio_port = alOpenPort("SDL audio", "w", audio_config); if (this->hidden->audio_port == NULL) { /* docs say AL_BAD_CHANNELS happens here, too. */ int err = oserror(); if (err == AL_BAD_CHANNELS) { this->spec.channels = 2; alSetChannels(audio_config, this->spec.channels); this->hidden->audio_port = alOpenPort("SDL audio", "w", audio_config); } } if (this->hidden->audio_port != NULL) { valid = 1; } } alFreeConfig(audio_config); } } } if (!valid) { IRIXAUDIO_CloseDevice(this); SDL_SetError("Unsupported audio format"); return 0; } /* Update the fragment size as size in bytes */ SDL_CalculateAudioSpec(&this->spec); /* Allocate mixing buffer */ this->hidden->mixbuf = (Uint8 *) SDL_AllocAudioMem(this->spec.size); if (this->hidden->mixbuf == NULL) { IRIXAUDIO_CloseDevice(this); SDL_OutOfMemory(); return 0; } SDL_memset(this->hidden->mixbuf, this->spec.silence, this->spec.size); /* We're ready to rock and roll. :-) */ return 1; } static int IRIXAUDIO_Init(SDL_AudioDriverImpl * impl) { /* Set the function pointers */ impl->OpenDevice = DSP_OpenDevice; impl->PlayDevice = DSP_PlayDevice; impl->WaitDevice = DSP_WaitDevice; impl->GetDeviceBuf = DSP_GetDeviceBuf; impl->CloseDevice = DSP_CloseDevice; impl->OnlyHasDefaultOutputDevice = 1; /* !!! FIXME: not true, I think. */ return 1; } AudioBootStrap IRIXAUDIO_bootstrap = { "AL", "IRIX DMedia audio", IRIXAUDIO_Init, 0 }; /* vi: set ts=4 sw=4 expandtab: */