diff options
Diffstat (limited to 'distrib/sdl-1.2.12/src/audio/arts/SDL_artsaudio.c')
| -rw-r--r-- | distrib/sdl-1.2.12/src/audio/arts/SDL_artsaudio.c | 348 |
1 files changed, 0 insertions, 348 deletions
diff --git a/distrib/sdl-1.2.12/src/audio/arts/SDL_artsaudio.c b/distrib/sdl-1.2.12/src/audio/arts/SDL_artsaudio.c deleted file mode 100644 index 204e582..0000000 --- a/distrib/sdl-1.2.12/src/audio/arts/SDL_artsaudio.c +++ /dev/null @@ -1,348 +0,0 @@ -/* - SDL - Simple DirectMedia Layer - Copyright (C) 1997-2006 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 */ - -#ifdef HAVE_SIGNAL_H -#include <signal.h> -#endif -#include <unistd.h> - -#include "SDL_timer.h" -#include "SDL_audio.h" -#include "../SDL_audiomem.h" -#include "../SDL_audio_c.h" -#include "../SDL_audiodev_c.h" -#include "SDL_artsaudio.h" - -#ifdef SDL_AUDIO_DRIVER_ARTS_DYNAMIC -#include "SDL_name.h" -#include "SDL_loadso.h" -#else -#define SDL_NAME(X) X -#endif - -/* The tag name used by artsc audio */ -#define ARTS_DRIVER_NAME "arts" - -/* Audio driver functions */ -static int ARTS_OpenAudio(_THIS, SDL_AudioSpec *spec); -static void ARTS_WaitAudio(_THIS); -static void ARTS_PlayAudio(_THIS); -static Uint8 *ARTS_GetAudioBuf(_THIS); -static void ARTS_CloseAudio(_THIS); - -#ifdef SDL_AUDIO_DRIVER_ARTS_DYNAMIC - -static const char *arts_library = SDL_AUDIO_DRIVER_ARTS_DYNAMIC; -static void *arts_handle = NULL; -static int arts_loaded = 0; - -static int (*SDL_NAME(arts_init))(void); -static void (*SDL_NAME(arts_free))(void); -static arts_stream_t (*SDL_NAME(arts_play_stream))(int rate, int bits, int channels, const char *name); -static int (*SDL_NAME(arts_stream_set))(arts_stream_t s, arts_parameter_t param, int value); -static int (*SDL_NAME(arts_stream_get))(arts_stream_t s, arts_parameter_t param); -static int (*SDL_NAME(arts_write))(arts_stream_t s, const void *buffer, int count); -static void (*SDL_NAME(arts_close_stream))(arts_stream_t s); -static int (*SDL_NAME(arts_suspended))(void); -static const char *(*SDL_NAME(arts_error_text))(int errorcode); - -static struct { - const char *name; - void **func; -} arts_functions[] = { - { "arts_init", (void **)&SDL_NAME(arts_init) }, - { "arts_free", (void **)&SDL_NAME(arts_free) }, - { "arts_play_stream", (void **)&SDL_NAME(arts_play_stream) }, - { "arts_stream_set", (void **)&SDL_NAME(arts_stream_set) }, - { "arts_stream_get", (void **)&SDL_NAME(arts_stream_get) }, - { "arts_write", (void **)&SDL_NAME(arts_write) }, - { "arts_close_stream", (void **)&SDL_NAME(arts_close_stream) }, - { "arts_suspended", (void **)&SDL_NAME(arts_suspended) }, - { "arts_error_text", (void **)&SDL_NAME(arts_error_text) }, -}; - -static void UnloadARTSLibrary() -{ - if ( arts_loaded ) { - SDL_UnloadObject(arts_handle); - arts_handle = NULL; - arts_loaded = 0; - } -} - -static int LoadARTSLibrary(void) -{ - int i, retval = -1; - - arts_handle = SDL_LoadObject(arts_library); - if ( arts_handle ) { - arts_loaded = 1; - retval = 0; - for ( i=0; i<SDL_arraysize(arts_functions); ++i ) { - *arts_functions[i].func = SDL_LoadFunction(arts_handle, arts_functions[i].name); - if ( !*arts_functions[i].func ) { - retval = -1; - UnloadARTSLibrary(); - break; - } - } - } - return retval; -} - -#else - -static void UnloadARTSLibrary() -{ - return; -} - -static int LoadARTSLibrary(void) -{ - return 0; -} - -#endif /* SDL_AUDIO_DRIVER_ARTS_DYNAMIC */ - -/* Audio driver bootstrap functions */ - -static int Audio_Available(void) -{ - int available = 0; - - if ( LoadARTSLibrary() < 0 ) { - return available; - } - if ( SDL_NAME(arts_init)() == 0 ) { - if ( SDL_NAME(arts_suspended)() ) { - /* Play a stream so aRts doesn't crash */ - arts_stream_t stream2; - stream2=SDL_NAME(arts_play_stream)(44100, 16, 2, "SDL"); - SDL_NAME(arts_write)(stream2, "", 0); - SDL_NAME(arts_close_stream)(stream2); - available = 1; - } - SDL_NAME(arts_free)(); - } - UnloadARTSLibrary(); - - return available; -} - -static void Audio_DeleteDevice(SDL_AudioDevice *device) -{ - SDL_free(device->hidden); - SDL_free(device); - UnloadARTSLibrary(); -} - -static SDL_AudioDevice *Audio_CreateDevice(int devindex) -{ - SDL_AudioDevice *this; - - /* Initialize all variables that we clean on shutdown */ - LoadARTSLibrary(); - 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)); - stream = 0; - - /* Set the function pointers */ - this->OpenAudio = ARTS_OpenAudio; - this->WaitAudio = ARTS_WaitAudio; - this->PlayAudio = ARTS_PlayAudio; - this->GetAudioBuf = ARTS_GetAudioBuf; - this->CloseAudio = ARTS_CloseAudio; - - this->free = Audio_DeleteDevice; - - return this; -} - -AudioBootStrap ARTS_bootstrap = { - ARTS_DRIVER_NAME, "Analog Realtime Synthesizer", - Audio_Available, Audio_CreateDevice -}; - -/* This function waits until it is possible to write a full sound buffer */ -static void ARTS_WaitAudio(_THIS) -{ - Sint32 ticks; - - /* Check to see if the thread-parent process is still alive */ - { static int cnt = 0; - /* Note that this only works with thread implementations - that use a different process id for each thread. - */ - if (parent && (((++cnt)%10) == 0)) { /* Check every 10 loops */ - if ( kill(parent, 0) < 0 ) { - this->enabled = 0; - } - } - } - - /* Use timer for general audio synchronization */ - ticks = ((Sint32)(next_frame - SDL_GetTicks()))-FUDGE_TICKS; - if ( ticks > 0 ) { - SDL_Delay(ticks); - } -} - -static void ARTS_PlayAudio(_THIS) -{ - int written; - - /* Write the audio data */ - written = SDL_NAME(arts_write)(stream, mixbuf, mixlen); - - /* If timer synchronization is enabled, set the next write frame */ - if ( frame_ticks ) { - next_frame += frame_ticks; - } - - /* If we couldn't write, assume fatal error for now */ - if ( written < 0 ) { - this->enabled = 0; - } -#ifdef DEBUG_AUDIO - fprintf(stderr, "Wrote %d bytes of audio data\n", written); -#endif -} - -static Uint8 *ARTS_GetAudioBuf(_THIS) -{ - return(mixbuf); -} - -static void ARTS_CloseAudio(_THIS) -{ - if ( mixbuf != NULL ) { - SDL_FreeAudioMem(mixbuf); - mixbuf = NULL; - } - if ( stream ) { - SDL_NAME(arts_close_stream)(stream); - stream = 0; - } - SDL_NAME(arts_free)(); -} - -static int ARTS_OpenAudio(_THIS, SDL_AudioSpec *spec) -{ - int bits, frag_spec; - Uint16 test_format, format; - int error_code; - - /* Reset the timer synchronization flag */ - frame_ticks = 0.0; - - mixbuf = NULL; - - /* Try for a closest match on audio format */ - format = 0; - bits = 0; - for ( test_format = SDL_FirstAudioFormat(spec->format); - ! format && test_format; ) { -#ifdef DEBUG_AUDIO - fprintf(stderr, "Trying format 0x%4.4x\n", test_format); -#endif - switch ( test_format ) { - case AUDIO_U8: - bits = 8; - format = 1; - break; - case AUDIO_S16LSB: - bits = 16; - format = 1; - break; - default: - format = 0; - break; - } - if ( ! format ) { - test_format = SDL_NextAudioFormat(); - } - } - if ( format == 0 ) { - SDL_SetError("Couldn't find any hardware audio formats"); - return(-1); - } - spec->format = test_format; - - error_code = SDL_NAME(arts_init)(); - if ( error_code != 0 ) { - SDL_SetError("Unable to initialize ARTS: %s", SDL_NAME(arts_error_text)(error_code)); - return(-1); - } - if ( ! SDL_NAME(arts_suspended)() ) { - SDL_SetError("ARTS can not open audio device"); - return(-1); - } - stream = SDL_NAME(arts_play_stream)(spec->freq, bits, spec->channels, "SDL"); - - /* Calculate the final parameters for this audio specification */ - SDL_CalculateAudioSpec(spec); - - /* Determine the power of two of the fragment size */ - for ( frag_spec = 0; (0x01<<frag_spec) < spec->size; ++frag_spec ); - if ( (0x01<<frag_spec) != spec->size ) { - SDL_SetError("Fragment size must be a power of two"); - return(-1); - } - frag_spec |= 0x00020000; /* two fragments, for low latency */ - -#ifdef ARTS_P_PACKET_SETTINGS - SDL_NAME(arts_stream_set)(stream, ARTS_P_PACKET_SETTINGS, frag_spec); -#else - SDL_NAME(arts_stream_set)(stream, ARTS_P_PACKET_SIZE, frag_spec&0xffff); - SDL_NAME(arts_stream_set)(stream, ARTS_P_PACKET_COUNT, frag_spec>>16); -#endif - spec->size = SDL_NAME(arts_stream_get)(stream, ARTS_P_PACKET_SIZE); - - /* Allocate mixing buffer */ - mixlen = spec->size; - mixbuf = (Uint8 *)SDL_AllocAudioMem(mixlen); - if ( mixbuf == NULL ) { - return(-1); - } - SDL_memset(mixbuf, spec->silence, spec->size); - - /* Get the parent process id (we're the parent of the audio thread) */ - parent = getpid(); - - /* We're ready to rock and roll. :-) */ - return(0); -} |