19682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* 29682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL - Simple DirectMedia Layer 39682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Copyright (C) 1997-2012 Sam Lantinga 49682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 59682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall This library is free software; you can redistribute it and/or 69682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall modify it under the terms of the GNU Lesser General Public 79682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall License as published by the Free Software Foundation; either 89682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall version 2.1 of the License, or (at your option) any later version. 99682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall This library is distributed in the hope that it will be useful, 119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall but WITHOUT ANY WARRANTY; without even the implied warranty of 129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Lesser General Public License for more details. 149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall You should have received a copy of the GNU Lesser General Public 169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall License along with this library; if not, write to the Free Software 179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Sam Lantinga 209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall slouken@libsdl.org 219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall*/ 229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_config.h" 239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* Allow access to a raw mixing buffer */ 259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#ifdef HAVE_SIGNAL_H 279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include <signal.h> 289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#endif 299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include <unistd.h> 309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_timer.h" 329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_audio.h" 339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "../SDL_audiomem.h" 349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "../SDL_audio_c.h" 359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "../SDL_audiodev_c.h" 369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_artsaudio.h" 379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#ifdef SDL_AUDIO_DRIVER_ARTS_DYNAMIC 399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_name.h" 409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_loadso.h" 419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#else 429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#define SDL_NAME(X) X 439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#endif 449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* The tag name used by artsc audio */ 469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#define ARTS_DRIVER_NAME "arts" 479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* Audio driver functions */ 499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic int ARTS_OpenAudio(_THIS, SDL_AudioSpec *spec); 509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void ARTS_WaitAudio(_THIS); 519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void ARTS_PlayAudio(_THIS); 529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic Uint8 *ARTS_GetAudioBuf(_THIS); 539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void ARTS_CloseAudio(_THIS); 549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#ifdef SDL_AUDIO_DRIVER_ARTS_DYNAMIC 569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic const char *arts_library = SDL_AUDIO_DRIVER_ARTS_DYNAMIC; 589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void *arts_handle = NULL; 599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic int arts_loaded = 0; 609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic int (*SDL_NAME(arts_init))(void); 629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void (*SDL_NAME(arts_free))(void); 639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic arts_stream_t (*SDL_NAME(arts_play_stream))(int rate, int bits, int channels, const char *name); 649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic int (*SDL_NAME(arts_stream_set))(arts_stream_t s, arts_parameter_t param, int value); 659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic int (*SDL_NAME(arts_stream_get))(arts_stream_t s, arts_parameter_t param); 669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic int (*SDL_NAME(arts_write))(arts_stream_t s, const void *buffer, int count); 679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void (*SDL_NAME(arts_close_stream))(arts_stream_t s); 689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic int (*SDL_NAME(arts_suspend))(void); 699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic int (*SDL_NAME(arts_suspended))(void); 709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic const char *(*SDL_NAME(arts_error_text))(int errorcode); 719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic struct { 739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall const char *name; 749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall void **func; 759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} arts_functions[] = { 769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { "arts_init", (void **)&SDL_NAME(arts_init) }, 779682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { "arts_free", (void **)&SDL_NAME(arts_free) }, 789682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { "arts_play_stream", (void **)&SDL_NAME(arts_play_stream) }, 799682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { "arts_stream_set", (void **)&SDL_NAME(arts_stream_set) }, 809682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { "arts_stream_get", (void **)&SDL_NAME(arts_stream_get) }, 819682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { "arts_write", (void **)&SDL_NAME(arts_write) }, 829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { "arts_close_stream", (void **)&SDL_NAME(arts_close_stream) }, 839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { "arts_suspend", (void **)&SDL_NAME(arts_suspend) }, 849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { "arts_suspended", (void **)&SDL_NAME(arts_suspended) }, 859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { "arts_error_text", (void **)&SDL_NAME(arts_error_text) }, 869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall}; 879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void UnloadARTSLibrary() 899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( arts_loaded ) { 919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_UnloadObject(arts_handle); 929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall arts_handle = NULL; 939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall arts_loaded = 0; 949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 969682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 979682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic int LoadARTSLibrary(void) 989682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 999682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int i, retval = -1; 1009682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1019682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall arts_handle = SDL_LoadObject(arts_library); 1029682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( arts_handle ) { 1039682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall arts_loaded = 1; 1049682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall retval = 0; 1059682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for ( i=0; i<SDL_arraysize(arts_functions); ++i ) { 1069682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall *arts_functions[i].func = SDL_LoadFunction(arts_handle, arts_functions[i].name); 1079682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( !*arts_functions[i].func ) { 1089682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall retval = -1; 1099682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall UnloadARTSLibrary(); 1109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 1119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return retval; 1159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 1169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#else 1189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void UnloadARTSLibrary() 1209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 1219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return; 1229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 1239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic int LoadARTSLibrary(void) 1259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 1269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return 0; 1279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 1289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#endif /* SDL_AUDIO_DRIVER_ARTS_DYNAMIC */ 1309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* Audio driver bootstrap functions */ 1329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic int ARTS_Suspend(void) 1349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 1359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall const Uint32 abortms = SDL_GetTicks() + 3000; /* give up after 3 secs */ 1369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( (!SDL_NAME(arts_suspended)()) && (SDL_GetTicks() < abortms) ) { 1379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( SDL_NAME(arts_suspend)() ) { 1389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 1399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return SDL_NAME(arts_suspended)(); 1439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 1449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic int Audio_Available(void) 1469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 1479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int available = 0; 1489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( LoadARTSLibrary() < 0 ) { 1509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return available; 1519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( SDL_NAME(arts_init)() == 0 ) { 1539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( ARTS_Suspend() ) { 1549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Play a stream so aRts doesn't crash */ 1559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall arts_stream_t stream2; 1569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall stream2=SDL_NAME(arts_play_stream)(44100, 16, 2, "SDL"); 1579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_NAME(arts_write)(stream2, "", 0); 1589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_NAME(arts_close_stream)(stream2); 1599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall available = 1; 1609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_NAME(arts_free)(); 1629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall UnloadARTSLibrary(); 1649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return available; 1669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 1679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void Audio_DeleteDevice(SDL_AudioDevice *device) 1699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 1709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_free(device->hidden); 1719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_free(device); 1729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall UnloadARTSLibrary(); 1739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 1749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic SDL_AudioDevice *Audio_CreateDevice(int devindex) 1769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 1779682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_AudioDevice *this; 1789682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1799682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Initialize all variables that we clean on shutdown */ 1809682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall LoadARTSLibrary(); 1819682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); 1829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( this ) { 1839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_memset(this, 0, (sizeof *this)); 1849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->hidden = (struct SDL_PrivateAudioData *) 1859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_malloc((sizeof *this->hidden)); 1869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( (this == NULL) || (this->hidden == NULL) ) { 1889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_OutOfMemory(); 1899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( this ) { 1909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_free(this); 1919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return(0); 1939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_memset(this->hidden, 0, (sizeof *this->hidden)); 1959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall stream = 0; 1969682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1979682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Set the function pointers */ 1989682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->OpenAudio = ARTS_OpenAudio; 1999682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->WaitAudio = ARTS_WaitAudio; 2009682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->PlayAudio = ARTS_PlayAudio; 2019682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->GetAudioBuf = ARTS_GetAudioBuf; 2029682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->CloseAudio = ARTS_CloseAudio; 2039682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2049682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->free = Audio_DeleteDevice; 2059682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2069682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return this; 2079682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 2089682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2099682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse HallAudioBootStrap ARTS_bootstrap = { 2109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall ARTS_DRIVER_NAME, "Analog Realtime Synthesizer", 2119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Audio_Available, Audio_CreateDevice 2129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall}; 2139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* This function waits until it is possible to write a full sound buffer */ 2159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void ARTS_WaitAudio(_THIS) 2169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 2179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Sint32 ticks; 2189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Check to see if the thread-parent process is still alive */ 2209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall { static int cnt = 0; 2219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Note that this only works with thread implementations 2229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall that use a different process id for each thread. 2239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall */ 2249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (parent && (((++cnt)%10) == 0)) { /* Check every 10 loops */ 2259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( kill(parent, 0) < 0 ) { 2269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->enabled = 0; 2279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Use timer for general audio synchronization */ 2329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall ticks = ((Sint32)(next_frame - SDL_GetTicks()))-FUDGE_TICKS; 2339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( ticks > 0 ) { 2349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_Delay(ticks); 2359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 2379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void ARTS_PlayAudio(_THIS) 2399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 2409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int written; 2419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Write the audio data */ 2439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall written = SDL_NAME(arts_write)(stream, mixbuf, mixlen); 2449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* If timer synchronization is enabled, set the next write frame */ 2469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( frame_ticks ) { 2479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall next_frame += frame_ticks; 2489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* If we couldn't write, assume fatal error for now */ 2519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( written < 0 ) { 2529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->enabled = 0; 2539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#ifdef DEBUG_AUDIO 2559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall fprintf(stderr, "Wrote %d bytes of audio data\n", written); 2569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#endif 2579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 2589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic Uint8 *ARTS_GetAudioBuf(_THIS) 2609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 2619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return(mixbuf); 2629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 2639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void ARTS_CloseAudio(_THIS) 2659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 2669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( mixbuf != NULL ) { 2679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_FreeAudioMem(mixbuf); 2689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall mixbuf = NULL; 2699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( stream ) { 2719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_NAME(arts_close_stream)(stream); 2729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall stream = 0; 2739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_NAME(arts_free)(); 2759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 2769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2779682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic int ARTS_OpenAudio(_THIS, SDL_AudioSpec *spec) 2789682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 2799682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int bits, frag_spec; 2809682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint16 test_format, format; 2819682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int error_code; 2829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Reset the timer synchronization flag */ 2849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall frame_ticks = 0.0; 2859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall mixbuf = NULL; 2879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Try for a closest match on audio format */ 2899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall format = 0; 2909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bits = 0; 2919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for ( test_format = SDL_FirstAudioFormat(spec->format); 2929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall ! format && test_format; ) { 2939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#ifdef DEBUG_AUDIO 2949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall fprintf(stderr, "Trying format 0x%4.4x\n", test_format); 2959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#endif 2969682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall switch ( test_format ) { 2979682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case AUDIO_U8: 2989682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bits = 8; 2999682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall format = 1; 3009682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 3019682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case AUDIO_S16LSB: 3029682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall bits = 16; 3039682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall format = 1; 3049682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 3059682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall default: 3069682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall format = 0; 3079682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 3089682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3099682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( ! format ) { 3109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall test_format = SDL_NextAudioFormat(); 3119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( format == 0 ) { 3149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("Couldn't find any hardware audio formats"); 3159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return(-1); 3169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall spec->format = test_format; 3189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall error_code = SDL_NAME(arts_init)(); 3209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( error_code != 0 ) { 3219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("Unable to initialize ARTS: %s", SDL_NAME(arts_error_text)(error_code)); 3229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return(-1); 3239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( ! ARTS_Suspend() ) { 3259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("ARTS can not open audio device"); 3269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return(-1); 3279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall stream = SDL_NAME(arts_play_stream)(spec->freq, bits, spec->channels, "SDL"); 3299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Calculate the final parameters for this audio specification */ 3319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_CalculateAudioSpec(spec); 3329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Determine the power of two of the fragment size */ 3349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for ( frag_spec = 0; (0x01<<frag_spec) < spec->size; ++frag_spec ); 3359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( (0x01<<frag_spec) != spec->size ) { 3369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("Fragment size must be a power of two"); 3379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return(-1); 3389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall frag_spec |= 0x00020000; /* two fragments, for low latency */ 3409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#ifdef ARTS_P_PACKET_SETTINGS 3429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_NAME(arts_stream_set)(stream, ARTS_P_PACKET_SETTINGS, frag_spec); 3439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#else 3449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_NAME(arts_stream_set)(stream, ARTS_P_PACKET_SIZE, frag_spec&0xffff); 3459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_NAME(arts_stream_set)(stream, ARTS_P_PACKET_COUNT, frag_spec>>16); 3469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#endif 3479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall spec->size = SDL_NAME(arts_stream_get)(stream, ARTS_P_PACKET_SIZE); 3489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Allocate mixing buffer */ 3509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall mixlen = spec->size; 3519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall mixbuf = (Uint8 *)SDL_AllocAudioMem(mixlen); 3529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( mixbuf == NULL ) { 3539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return(-1); 3549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 3559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_memset(mixbuf, spec->silence, spec->size); 3569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Get the parent process id (we're the parent of the audio thread) */ 3589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall parent = getpid(); 3599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 3609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* We're ready to rock and roll. :-) */ 3619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return(0); 3629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 363