diff options
Diffstat (limited to 'distrib/sdl-1.2.12/src/audio/esd/SDL_esdaudio.c')
| -rw-r--r-- | distrib/sdl-1.2.12/src/audio/esd/SDL_esdaudio.c | 323 |
1 files changed, 0 insertions, 323 deletions
diff --git a/distrib/sdl-1.2.12/src/audio/esd/SDL_esdaudio.c b/distrib/sdl-1.2.12/src/audio/esd/SDL_esdaudio.c deleted file mode 100644 index d35e89a..0000000 --- a/distrib/sdl-1.2.12/src/audio/esd/SDL_esdaudio.c +++ /dev/null @@ -1,323 +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 an ESD network stream mixing buffer */ - -#include <sys/types.h> -#include <unistd.h> -#include <signal.h> -#include <errno.h> -#include <esd.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_esdaudio.h" - -#ifdef SDL_AUDIO_DRIVER_ESD_DYNAMIC -#include "SDL_name.h" -#include "SDL_loadso.h" -#else -#define SDL_NAME(X) X -#endif - -/* The tag name used by ESD audio */ -#define ESD_DRIVER_NAME "esd" - -/* Audio driver functions */ -static int ESD_OpenAudio(_THIS, SDL_AudioSpec *spec); -static void ESD_WaitAudio(_THIS); -static void ESD_PlayAudio(_THIS); -static Uint8 *ESD_GetAudioBuf(_THIS); -static void ESD_CloseAudio(_THIS); - -#ifdef SDL_AUDIO_DRIVER_ESD_DYNAMIC - -static const char *esd_library = SDL_AUDIO_DRIVER_ESD_DYNAMIC; -static void *esd_handle = NULL; -static int esd_loaded = 0; - -static int (*SDL_NAME(esd_open_sound))( const char *host ); -static int (*SDL_NAME(esd_close))( int esd ); -static int (*SDL_NAME(esd_play_stream))( esd_format_t format, int rate, - const char *host, const char *name ); -static struct { - const char *name; - void **func; -} esd_functions[] = { - { "esd_open_sound", (void **)&SDL_NAME(esd_open_sound) }, - { "esd_close", (void **)&SDL_NAME(esd_close) }, - { "esd_play_stream", (void **)&SDL_NAME(esd_play_stream) }, -}; - -static void UnloadESDLibrary() -{ - if ( esd_loaded ) { - SDL_UnloadObject(esd_handle); - esd_handle = NULL; - esd_loaded = 0; - } -} - -static int LoadESDLibrary(void) -{ - int i, retval = -1; - - esd_handle = SDL_LoadObject(esd_library); - if ( esd_handle ) { - esd_loaded = 1; - retval = 0; - for ( i=0; i<SDL_arraysize(esd_functions); ++i ) { - *esd_functions[i].func = SDL_LoadFunction(esd_handle, esd_functions[i].name); - if ( !*esd_functions[i].func ) { - retval = -1; - UnloadESDLibrary(); - break; - } - } - } - return retval; -} - -#else - -static void UnloadESDLibrary() -{ - return; -} - -static int LoadESDLibrary(void) -{ - return 0; -} - -#endif /* SDL_AUDIO_DRIVER_ESD_DYNAMIC */ - -/* Audio driver bootstrap functions */ - -static int Audio_Available(void) -{ - int connection; - int available; - - available = 0; - if ( LoadESDLibrary() < 0 ) { - return available; - } - connection = SDL_NAME(esd_open_sound)(NULL); - if ( connection >= 0 ) { - available = 1; - SDL_NAME(esd_close)(connection); - } - UnloadESDLibrary(); - return(available); -} - -static void Audio_DeleteDevice(SDL_AudioDevice *device) -{ - SDL_free(device->hidden); - SDL_free(device); - UnloadESDLibrary(); -} - -static SDL_AudioDevice *Audio_CreateDevice(int devindex) -{ - SDL_AudioDevice *this; - - /* Initialize all variables that we clean on shutdown */ - LoadESDLibrary(); - 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)); - audio_fd = -1; - - /* Set the function pointers */ - this->OpenAudio = ESD_OpenAudio; - this->WaitAudio = ESD_WaitAudio; - this->PlayAudio = ESD_PlayAudio; - this->GetAudioBuf = ESD_GetAudioBuf; - this->CloseAudio = ESD_CloseAudio; - - this->free = Audio_DeleteDevice; - - return this; -} - -AudioBootStrap ESD_bootstrap = { - ESD_DRIVER_NAME, "Enlightened Sound Daemon", - Audio_Available, Audio_CreateDevice -}; - -/* This function waits until it is possible to write a full sound buffer */ -static void ESD_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 ESD_PlayAudio(_THIS) -{ - int written; - - /* Write the audio data, checking for EAGAIN on broken audio drivers */ - do { - written = write(audio_fd, mixbuf, mixlen); - if ( (written < 0) && ((errno == 0) || (errno == EAGAIN)) ) { - SDL_Delay(1); /* Let a little CPU time go by */ - } - } while ( (written < 0) && - ((errno == 0) || (errno == EAGAIN) || (errno == EINTR)) ); - - /* Set the next write frame */ - next_frame += frame_ticks; - - /* If we couldn't write, assume fatal error for now */ - if ( written < 0 ) { - this->enabled = 0; - } -} - -static Uint8 *ESD_GetAudioBuf(_THIS) -{ - return(mixbuf); -} - -static void ESD_CloseAudio(_THIS) -{ - if ( mixbuf != NULL ) { - SDL_FreeAudioMem(mixbuf); - mixbuf = NULL; - } - if ( audio_fd >= 0 ) { - SDL_NAME(esd_close)(audio_fd); - audio_fd = -1; - } -} - -/* Try to get the name of the program */ -static char *get_progname(void) -{ - char *progname = NULL; -#ifdef __LINUX__ - FILE *fp; - static char temp[BUFSIZ]; - - SDL_snprintf(temp, SDL_arraysize(temp), "/proc/%d/cmdline", getpid()); - fp = fopen(temp, "r"); - if ( fp != NULL ) { - if ( fgets(temp, sizeof(temp)-1, fp) ) { - progname = SDL_strrchr(temp, '/'); - if ( progname == NULL ) { - progname = temp; - } else { - progname = progname+1; - } - } - fclose(fp); - } -#endif - return(progname); -} - -static int ESD_OpenAudio(_THIS, SDL_AudioSpec *spec) -{ - esd_format_t format; - - /* Convert audio spec to the ESD audio format */ - format = (ESD_STREAM | ESD_PLAY); - switch ( spec->format & 0xFF ) { - case 8: - format |= ESD_BITS8; - break; - case 16: - format |= ESD_BITS16; - break; - default: - SDL_SetError("Unsupported ESD audio format"); - return(-1); - } - if ( spec->channels == 1 ) { - format |= ESD_MONO; - } else { - format |= ESD_STEREO; - } -#if 0 - spec->samples = ESD_BUF_SIZE; /* Darn, no way to change this yet */ -#endif - - /* Open a connection to the ESD audio server */ - audio_fd = SDL_NAME(esd_play_stream)(format, spec->freq, NULL, get_progname()); - if ( audio_fd < 0 ) { - SDL_SetError("Couldn't open ESD connection"); - return(-1); - } - - /* Calculate the final parameters for this audio specification */ - SDL_CalculateAudioSpec(spec); - frame_ticks = (float)(spec->samples*1000)/spec->freq; - next_frame = SDL_GetTicks()+frame_ticks; - - /* 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); -} |