Mercurial > sdl-ios-xcode
view src/audio/SDL_audio.c @ 4391:07b330419439 SDL-1.2
Fixed bug #849 some more:
Tim Angus 2009-11-26 14:41:04 PST
Fix to the cursor not being responsive when the app doesn't have
SDL_APPINPUTFOCUS
The problems with the directx driver are similar to the ones I introduced in
the windib driver with r4478. Basically if the application did not have focus,
the mouse position is not updated. It's not really that the mouse cursor was
invisible, it's that it is stuck underneath another window where you can't see
it. This behaviour predates my r4478 changes and is the reason I unwittingly
broke the windib driver as I had been replicating the way the directx driver
deals with focus. Prior to r4478 the directx driver could not be used in
windowed mode, so the broken focusing would not have actually been observable.
Anyway, the attached patch makes the directx driver behaves like the windib
driver in terms of focus.
Time for 1.2.15? ;)
I've added an additional change of moving the calls to WIN_GrabInput that are
made on WM_ACTIVATE messages so that they only occur when the state is
SDL_APPINPUTFOCUS. When a fullscreen application is minimised using alt-tab, it
still receives WM_ACTIVATE messages when other applications are selected. If
WIN_GrabInput is called when the SDL application doesn't have input focus, bad
things happen; it shouldn't be being called at all.
I've also added a line to make sure that SDL_APPMOUSEFOCUS state is dropped
when the application is minimised following an alt-tab.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Fri, 11 Dec 2009 15:24:53 +0000 |
parents | 33570eec2d4f |
children | fe15c4e8efe6 |
line wrap: on
line source
/* 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 "SDL_config.h" /* Allow access to a raw mixing buffer */ #include "SDL.h" #include "SDL_audio_c.h" #include "SDL_audiomem.h" #include "SDL_sysaudio.h" #ifdef __OS2__ /* We'll need the DosSetPriority() API! */ #define INCL_DOSPROCESS #include <os2.h> #endif /* Available audio drivers */ static AudioBootStrap *bootstrap[] = { #if SDL_AUDIO_DRIVER_BSD &BSD_AUDIO_bootstrap, #endif #if SDL_AUDIO_DRIVER_PULSE &PULSE_bootstrap, #endif #if SDL_AUDIO_DRIVER_ALSA &ALSA_bootstrap, #endif #if SDL_AUDIO_DRIVER_OSS &DSP_bootstrap, &DMA_bootstrap, #endif #if SDL_AUDIO_DRIVER_QNXNTO &QNXNTOAUDIO_bootstrap, #endif #if SDL_AUDIO_DRIVER_SUNAUDIO &SUNAUDIO_bootstrap, #endif #if SDL_AUDIO_DRIVER_DMEDIA &DMEDIA_bootstrap, #endif #if SDL_AUDIO_DRIVER_ARTS &ARTS_bootstrap, #endif #if SDL_AUDIO_DRIVER_ESD &ESD_bootstrap, #endif #if SDL_AUDIO_DRIVER_NAS &NAS_bootstrap, #endif #if SDL_AUDIO_DRIVER_DSOUND &DSOUND_bootstrap, #endif #if SDL_AUDIO_DRIVER_WAVEOUT &WAVEOUT_bootstrap, #endif #if SDL_AUDIO_DRIVER_PAUD &Paud_bootstrap, #endif #if SDL_AUDIO_DRIVER_BAUDIO &BAUDIO_bootstrap, #endif #if SDL_AUDIO_DRIVER_COREAUDIO &COREAUDIO_bootstrap, #endif #if SDL_AUDIO_DRIVER_SNDMGR &SNDMGR_bootstrap, #endif #if SDL_AUDIO_DRIVER_MINT &MINTAUDIO_GSXB_bootstrap, &MINTAUDIO_MCSN_bootstrap, &MINTAUDIO_STFA_bootstrap, &MINTAUDIO_XBIOS_bootstrap, &MINTAUDIO_DMA8_bootstrap, #endif #if SDL_AUDIO_DRIVER_DISK &DISKAUD_bootstrap, #endif #if SDL_AUDIO_DRIVER_DUMMY &DUMMYAUD_bootstrap, #endif #if SDL_AUDIO_DRIVER_DC &DCAUD_bootstrap, #endif #if SDL_AUDIO_DRIVER_NDS &NDSAUD_bootstrap, #endif #if SDL_AUDIO_DRIVER_MMEAUDIO &MMEAUDIO_bootstrap, #endif #if SDL_AUDIO_DRIVER_DART &DART_bootstrap, #endif #if SDL_AUDIO_DRIVER_EPOCAUDIO &EPOCAudio_bootstrap, #endif NULL }; SDL_AudioDevice *current_audio = NULL; /* Various local functions */ int SDL_AudioInit(const char *driver_name); void SDL_AudioQuit(void); /* The general mixing thread function */ int SDLCALL SDL_RunAudio(void *audiop) { SDL_AudioDevice *audio = (SDL_AudioDevice *)audiop; Uint8 *stream; int stream_len; void *udata; void (SDLCALL *fill)(void *userdata,Uint8 *stream, int len); int silence; /* Perform any thread setup */ if ( audio->ThreadInit ) { audio->ThreadInit(audio); } audio->threadid = SDL_ThreadID(); /* Set up the mixing function */ fill = audio->spec.callback; udata = audio->spec.userdata; if ( audio->convert.needed ) { if ( audio->convert.src_format == AUDIO_U8 ) { silence = 0x80; } else { silence = 0; } stream_len = audio->convert.len; } else { silence = audio->spec.silence; stream_len = audio->spec.size; } #ifdef __OS2__ /* Increase the priority of this thread to make sure that the audio will be continuous all the time! */ #ifdef USE_DOSSETPRIORITY if (SDL_getenv("SDL_USE_TIMECRITICAL_AUDIO")) { #ifdef DEBUG_BUILD printf("[SDL_RunAudio] : Setting priority to TimeCritical+0! (TID%d)\n", SDL_ThreadID()); #endif DosSetPriority(PRTYS_THREAD, PRTYC_TIMECRITICAL, 0, 0); } else { #ifdef DEBUG_BUILD printf("[SDL_RunAudio] : Setting priority to ForegroundServer+0! (TID%d)\n", SDL_ThreadID()); #endif DosSetPriority(PRTYS_THREAD, PRTYC_FOREGROUNDSERVER, 0, 0); } #endif #endif /* Loop, filling the audio buffers */ while ( audio->enabled ) { /* Fill the current buffer with sound */ if ( audio->convert.needed ) { if ( audio->convert.buf ) { stream = audio->convert.buf; } else { continue; } } else { stream = audio->GetAudioBuf(audio); if ( stream == NULL ) { stream = audio->fake_stream; } } SDL_memset(stream, silence, stream_len); if ( ! audio->paused ) { SDL_mutexP(audio->mixer_lock); (*fill)(udata, stream, stream_len); SDL_mutexV(audio->mixer_lock); } /* Convert the audio if necessary */ if ( audio->convert.needed ) { SDL_ConvertAudio(&audio->convert); stream = audio->GetAudioBuf(audio); if ( stream == NULL ) { stream = audio->fake_stream; } SDL_memcpy(stream, audio->convert.buf, audio->convert.len_cvt); } /* Ready current buffer for play and change current buffer */ if ( stream != audio->fake_stream ) { audio->PlayAudio(audio); } /* Wait for an audio buffer to become available */ if ( stream == audio->fake_stream ) { SDL_Delay((audio->spec.samples*1000)/audio->spec.freq); } else { audio->WaitAudio(audio); } } /* Wait for the audio to drain.. */ if ( audio->WaitDone ) { audio->WaitDone(audio); } #ifdef __OS2__ #ifdef DEBUG_BUILD printf("[SDL_RunAudio] : Task exiting. (TID%d)\n", SDL_ThreadID()); #endif #endif return(0); } static void SDL_LockAudio_Default(SDL_AudioDevice *audio) { if ( audio->thread && (SDL_ThreadID() == audio->threadid) ) { return; } SDL_mutexP(audio->mixer_lock); } static void SDL_UnlockAudio_Default(SDL_AudioDevice *audio) { if ( audio->thread && (SDL_ThreadID() == audio->threadid) ) { return; } SDL_mutexV(audio->mixer_lock); } static Uint16 SDL_ParseAudioFormat(const char *string) { Uint16 format = 0; switch (*string) { case 'U': ++string; format |= 0x0000; break; case 'S': ++string; format |= 0x8000; break; default: return 0; } switch (SDL_atoi(string)) { case 8: string += 1; format |= 8; break; case 16: string += 2; format |= 16; if ( SDL_strcmp(string, "LSB") == 0 #if SDL_BYTEORDER == SDL_LIL_ENDIAN || SDL_strcmp(string, "SYS") == 0 #endif ) { format |= 0x0000; } if ( SDL_strcmp(string, "MSB") == 0 #if SDL_BYTEORDER == SDL_BIG_ENDIAN || SDL_strcmp(string, "SYS") == 0 #endif ) { format |= 0x1000; } break; default: return 0; } return format; } int SDL_AudioInit(const char *driver_name) { SDL_AudioDevice *audio; int i = 0, idx; /* Check to make sure we don't overwrite 'current_audio' */ if ( current_audio != NULL ) { SDL_AudioQuit(); } /* Select the proper audio driver */ audio = NULL; idx = 0; #if SDL_AUDIO_DRIVER_ESD if ( (driver_name == NULL) && (SDL_getenv("ESPEAKER") != NULL) ) { /* Ahem, we know that if ESPEAKER is set, user probably wants to use ESD, but don't start it if it's not already running. This probably isn't the place to do this, but... Shh! :) */ for ( i=0; bootstrap[i]; ++i ) { if ( SDL_strcasecmp(bootstrap[i]->name, "esd") == 0 ) { #ifdef HAVE_PUTENV const char *esd_no_spawn; /* Don't start ESD if it's not running */ esd_no_spawn = getenv("ESD_NO_SPAWN"); if ( esd_no_spawn == NULL ) { putenv("ESD_NO_SPAWN=1"); } #endif if ( bootstrap[i]->available() ) { audio = bootstrap[i]->create(0); break; } #ifdef HAVE_UNSETENV if ( esd_no_spawn == NULL ) { unsetenv("ESD_NO_SPAWN"); } #endif } } } #endif /* SDL_AUDIO_DRIVER_ESD */ if ( audio == NULL ) { if ( driver_name != NULL ) { #if 0 /* This will be replaced with a better driver selection API */ if ( SDL_strrchr(driver_name, ':') != NULL ) { idx = atoi(SDL_strrchr(driver_name, ':')+1); } #endif for ( i=0; bootstrap[i]; ++i ) { if (SDL_strcasecmp(bootstrap[i]->name, driver_name) == 0) { if ( bootstrap[i]->available() ) { audio=bootstrap[i]->create(idx); break; } } } } else { for ( i=0; bootstrap[i]; ++i ) { if ( bootstrap[i]->available() ) { audio = bootstrap[i]->create(idx); if ( audio != NULL ) { break; } } } } if ( audio == NULL ) { SDL_SetError("No available audio device"); #if 0 /* Don't fail SDL_Init() if audio isn't available. SDL_OpenAudio() will handle it at that point. *sigh* */ return(-1); #endif } } current_audio = audio; if ( current_audio ) { current_audio->name = bootstrap[i]->name; if ( !current_audio->LockAudio && !current_audio->UnlockAudio ) { current_audio->LockAudio = SDL_LockAudio_Default; current_audio->UnlockAudio = SDL_UnlockAudio_Default; } } return(0); } char *SDL_AudioDriverName(char *namebuf, int maxlen) { if ( current_audio != NULL ) { SDL_strlcpy(namebuf, current_audio->name, maxlen); return(namebuf); } return(NULL); } int SDL_OpenAudio(SDL_AudioSpec *desired, SDL_AudioSpec *obtained) { SDL_AudioDevice *audio; const char *env; /* Start up the audio driver, if necessary */ if ( ! current_audio ) { if ( (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0) || (current_audio == NULL) ) { return(-1); } } audio = current_audio; if (audio->opened) { SDL_SetError("Audio device is already opened"); return(-1); } /* Verify some parameters */ if ( desired->freq == 0 ) { env = SDL_getenv("SDL_AUDIO_FREQUENCY"); if ( env ) { desired->freq = SDL_atoi(env); } } if ( desired->freq == 0 ) { /* Pick some default audio frequency */ desired->freq = 22050; } if ( desired->format == 0 ) { env = SDL_getenv("SDL_AUDIO_FORMAT"); if ( env ) { desired->format = SDL_ParseAudioFormat(env); } } if ( desired->format == 0 ) { /* Pick some default audio format */ desired->format = AUDIO_S16; } if ( desired->channels == 0 ) { env = SDL_getenv("SDL_AUDIO_CHANNELS"); if ( env ) { desired->channels = (Uint8)SDL_atoi(env); } } if ( desired->channels == 0 ) { /* Pick a default number of channels */ desired->channels = 2; } switch ( desired->channels ) { case 1: /* Mono */ case 2: /* Stereo */ case 4: /* surround */ case 6: /* surround with center and lfe */ break; default: SDL_SetError("1 (mono) and 2 (stereo) channels supported"); return(-1); } if ( desired->samples == 0 ) { env = SDL_getenv("SDL_AUDIO_SAMPLES"); if ( env ) { desired->samples = (Uint16)SDL_atoi(env); } } if ( desired->samples == 0 ) { /* Pick a default of ~46 ms at desired frequency */ int samples = (desired->freq / 1000) * 46; int power2 = 1; while ( power2 < samples ) { power2 *= 2; } desired->samples = power2; } if ( desired->callback == NULL ) { SDL_SetError("SDL_OpenAudio() passed a NULL callback"); return(-1); } #if SDL_THREADS_DISABLED /* Uses interrupt driven audio, without thread */ #else /* Create a semaphore for locking the sound buffers */ audio->mixer_lock = SDL_CreateMutex(); if ( audio->mixer_lock == NULL ) { SDL_SetError("Couldn't create mixer lock"); SDL_CloseAudio(); return(-1); } #endif /* SDL_THREADS_DISABLED */ /* Calculate the silence and size of the audio specification */ SDL_CalculateAudioSpec(desired); /* Open the audio subsystem */ SDL_memcpy(&audio->spec, desired, sizeof(audio->spec)); audio->convert.needed = 0; audio->enabled = 1; audio->paused = 1; audio->opened = audio->OpenAudio(audio, &audio->spec)+1; if ( ! audio->opened ) { SDL_CloseAudio(); return(-1); } /* If the audio driver changes the buffer size, accept it */ if ( audio->spec.samples != desired->samples ) { desired->samples = audio->spec.samples; SDL_CalculateAudioSpec(desired); } /* Allocate a fake audio memory buffer */ audio->fake_stream = SDL_AllocAudioMem(audio->spec.size); if ( audio->fake_stream == NULL ) { SDL_CloseAudio(); SDL_OutOfMemory(); return(-1); } /* See if we need to do any conversion */ if ( obtained != NULL ) { SDL_memcpy(obtained, &audio->spec, sizeof(audio->spec)); } else if ( desired->freq != audio->spec.freq || desired->format != audio->spec.format || desired->channels != audio->spec.channels ) { /* Build an audio conversion block */ if ( SDL_BuildAudioCVT(&audio->convert, desired->format, desired->channels, desired->freq, audio->spec.format, audio->spec.channels, audio->spec.freq) < 0 ) { SDL_CloseAudio(); return(-1); } if ( audio->convert.needed ) { audio->convert.len = (int) ( ((double) audio->spec.size) / audio->convert.len_ratio ); audio->convert.buf =(Uint8 *)SDL_AllocAudioMem( audio->convert.len*audio->convert.len_mult); if ( audio->convert.buf == NULL ) { SDL_CloseAudio(); SDL_OutOfMemory(); return(-1); } } } /* Start the audio thread if necessary */ switch (audio->opened) { case 1: /* Start the audio thread */ #if (defined(__WIN32__) && !defined(_WIN32_WCE)) && !defined(HAVE_LIBC) && !defined(__SYMBIAN32__) #undef SDL_CreateThread audio->thread = SDL_CreateThread(SDL_RunAudio, audio, NULL, NULL); #else audio->thread = SDL_CreateThread(SDL_RunAudio, audio); #endif if ( audio->thread == NULL ) { SDL_CloseAudio(); SDL_SetError("Couldn't create audio thread"); return(-1); } break; default: /* The audio is now playing */ break; } return(0); } SDL_audiostatus SDL_GetAudioStatus(void) { SDL_AudioDevice *audio = current_audio; SDL_audiostatus status; status = SDL_AUDIO_STOPPED; if ( audio && audio->enabled ) { if ( audio->paused ) { status = SDL_AUDIO_PAUSED; } else { status = SDL_AUDIO_PLAYING; } } return(status); } void SDL_PauseAudio (int pause_on) { SDL_AudioDevice *audio = current_audio; if ( audio ) { audio->paused = pause_on; } } void SDL_LockAudio (void) { SDL_AudioDevice *audio = current_audio; /* Obtain a lock on the mixing buffers */ if ( audio && audio->LockAudio ) { audio->LockAudio(audio); } } void SDL_UnlockAudio (void) { SDL_AudioDevice *audio = current_audio; /* Release lock on the mixing buffers */ if ( audio && audio->UnlockAudio ) { audio->UnlockAudio(audio); } } void SDL_CloseAudio (void) { SDL_QuitSubSystem(SDL_INIT_AUDIO); } void SDL_AudioQuit(void) { SDL_AudioDevice *audio = current_audio; if ( audio ) { audio->enabled = 0; if ( audio->thread != NULL ) { SDL_WaitThread(audio->thread, NULL); } if ( audio->mixer_lock != NULL ) { SDL_DestroyMutex(audio->mixer_lock); } if ( audio->fake_stream != NULL ) { SDL_FreeAudioMem(audio->fake_stream); } if ( audio->convert.needed ) { SDL_FreeAudioMem(audio->convert.buf); } if ( audio->opened ) { audio->CloseAudio(audio); audio->opened = 0; } /* Free the driver data */ audio->free(audio); current_audio = NULL; } } #define NUM_FORMATS 6 static int format_idx; static int format_idx_sub; static Uint16 format_list[NUM_FORMATS][NUM_FORMATS] = { { AUDIO_U8, AUDIO_S8, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB }, { AUDIO_S8, AUDIO_U8, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB }, { AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_U8, AUDIO_S8 }, { AUDIO_S16MSB, AUDIO_S16LSB, AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_U8, AUDIO_S8 }, { AUDIO_U16LSB, AUDIO_U16MSB, AUDIO_S16LSB, AUDIO_S16MSB, AUDIO_U8, AUDIO_S8 }, { AUDIO_U16MSB, AUDIO_U16LSB, AUDIO_S16MSB, AUDIO_S16LSB, AUDIO_U8, AUDIO_S8 }, }; Uint16 SDL_FirstAudioFormat(Uint16 format) { for ( format_idx=0; format_idx < NUM_FORMATS; ++format_idx ) { if ( format_list[format_idx][0] == format ) { break; } } format_idx_sub = 0; return(SDL_NextAudioFormat()); } Uint16 SDL_NextAudioFormat(void) { if ( (format_idx == NUM_FORMATS) || (format_idx_sub == NUM_FORMATS) ) { return(0); } return(format_list[format_idx][format_idx_sub++]); } void SDL_CalculateAudioSpec(SDL_AudioSpec *spec) { switch (spec->format) { case AUDIO_U8: spec->silence = 0x80; break; default: spec->silence = 0x00; break; } spec->size = (spec->format&0xFF)/8; spec->size *= spec->channels; spec->size *= spec->samples; }