/* snd_sdl.c (description) Copyright (C) 1996-1997 Id Software, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to: Free Software Foundation, Inc. 59 Temple Place - Suite 330 Boston, MA 02111-1307, USA $Id$ */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #ifdef HAVE_STRING_H # include #endif #ifdef HAVE_STRINGS_H # include #endif #include #include #include #include "QF/cmd.h" #include "QF/console.h" #include "QF/qargs.h" #include "QF/sound.h" #include "QF/sys.h" #include "QF/plugin.h" static dma_t the_shm; static int snd_inited; extern int desired_speed; extern int desired_bits; plugin_t plugin_info; plugin_data_t plugin_info_data; plugin_funcs_t plugin_info_funcs; general_data_t plugin_info_general_data; general_funcs_t plugin_info_general_funcs; sound_data_t plugin_info_sound_data; sound_funcs_t plugin_info_sound_funcs; static void paint_audio (void *unused, Uint8 * stream, int len) { int streamsamples; int sampleposbytes; int samplesbytes; if (shm) { streamsamples = len / (shm->samplebits / 8); sampleposbytes = shm->samplepos * (shm->samplebits / 8); samplesbytes = shm->samples * (shm->samplebits / 8); shm->samplepos += streamsamples; while (shm->samplepos >= shm->samples) shm->samplepos -= shm->samples; SND_PaintChannels (soundtime + streamsamples); if (shm->samplepos + streamsamples <= shm->samples) memcpy (stream, shm->buffer + sampleposbytes, len); else { memcpy (stream, shm->buffer + sampleposbytes, samplesbytes - sampleposbytes); memcpy (stream + samplesbytes - sampleposbytes, shm->buffer, len - (samplesbytes - sampleposbytes)); } soundtime += streamsamples; } } qboolean SNDDMA_Init (void) { SDL_AudioSpec desired, obtained; snd_inited = 0; /* Set up the desired format */ desired.freq = desired_speed; switch (desired_bits) { case 8: desired.format = AUDIO_U8; break; case 16: if (SDL_BYTEORDER == SDL_BIG_ENDIAN) desired.format = AUDIO_S16MSB; else desired.format = AUDIO_S16LSB; break; default: Con_Printf ("Unknown number of audio bits: %d\n", desired_bits); return 0; } desired.channels = 2; desired.samples = 1024; desired.callback = paint_audio; /* Open the audio device */ if (SDL_OpenAudio (&desired, &obtained) < 0) { Con_Printf ("Couldn't open SDL audio: %s\n", SDL_GetError ()); return 0; } /* Make sure we can support the audio format */ switch (obtained.format) { case AUDIO_U8: /* Supported */ break; case AUDIO_S16LSB: case AUDIO_S16MSB: if (((obtained.format == AUDIO_S16LSB) && (SDL_BYTEORDER == SDL_LIL_ENDIAN)) || ((obtained.format == AUDIO_S16MSB) && (SDL_BYTEORDER == SDL_BIG_ENDIAN))) { /* Supported */ break; } /* Unsupported, fall through */ ; default: /* Not supported -- force SDL to do our bidding */ SDL_CloseAudio (); if (SDL_OpenAudio (&desired, NULL) < 0) { Con_Printf ("Couldn't open SDL audio: %s\n", SDL_GetError ()); return 0; } memcpy (&obtained, &desired, sizeof (desired)); break; } SDL_LockAudio(); SDL_PauseAudio (0); /* Fill the audio DMA information block */ shm = &the_shm; shm->splitbuffer = 0; shm->samplebits = (obtained.format & 0xFF); shm->speed = obtained.freq; shm->channels = obtained.channels; shm->samples = obtained.samples * 16; shm->samplepos = 0; shm->submission_chunk = 1; shm->buffer = calloc(shm->samples * (shm->samplebits / 8), 1); if (!shm->buffer) { Sys_Error ("Failed to allocate buffer for sound!\n"); } snd_inited = 1; return 1; } int SNDDMA_GetDMAPos (void) { return shm->samplepos; } void SNDDMA_Shutdown (void) { if (snd_inited) { SDL_PauseAudio (1); SDL_UnlockAudio (); SDL_CloseAudio (); snd_inited = 0; shm = NULL; } } /* SNDDMA_Submit Send sound to device if buffer isn't really the dma buffer */ void SNDDMA_Submit (void) { if (snd_blocked) return; SDL_UnlockAudio(); SDL_LockAudio(); } plugin_t * PluginInfo (void) { plugin_info.type = qfp_sound; plugin_info.api_version = QFPLUGIN_VERSION; plugin_info.plugin_version = "0.1"; plugin_info.description = "SDL digital output"; plugin_info.copyright = "Copyright (C) 1996-1997 id Software, Inc.\n" "Copyright (C) 1999,2000,2001 contributors of the QuakeForge " "project\n" "Please see the file \"AUTHORS\" for a list of contributors"; plugin_info.functions = &plugin_info_funcs; plugin_info.data = &plugin_info_data; plugin_info_data.general = &plugin_info_general_data; plugin_info_data.input = NULL; plugin_info_data.sound = &plugin_info_sound_data; plugin_info_funcs.general = &plugin_info_general_funcs; plugin_info_funcs.input = NULL; plugin_info_funcs.sound = &plugin_info_sound_funcs; plugin_info_general_funcs.p_Init = SND_Init; plugin_info_general_funcs.p_Shutdown = SND_Shutdown; plugin_info_sound_funcs.pS_AmbientOff = SND_AmbientOff; plugin_info_sound_funcs.pS_AmbientOn = SND_AmbientOn; plugin_info_sound_funcs.pS_TouchSound = SND_TouchSound; plugin_info_sound_funcs.pS_ClearBuffer = SND_ClearBuffer; plugin_info_sound_funcs.pS_StaticSound = SND_StaticSound; plugin_info_sound_funcs.pS_StartSound = SND_StartSound; plugin_info_sound_funcs.pS_StopSound = SND_StopSound; plugin_info_sound_funcs.pS_PrecacheSound = SND_PrecacheSound; plugin_info_sound_funcs.pS_ClearPrecache = SND_ClearPrecache; plugin_info_sound_funcs.pS_Update = SND_Update; plugin_info_sound_funcs.pS_StopAllSounds = SND_StopAllSounds; plugin_info_sound_funcs.pS_BeginPrecaching = SND_BeginPrecaching; plugin_info_sound_funcs.pS_EndPrecaching = SND_EndPrecaching; plugin_info_sound_funcs.pS_ExtraUpdate = SND_ExtraUpdate; plugin_info_sound_funcs.pS_LocalSound = SND_LocalSound; plugin_info_sound_funcs.pS_BlockSound = SND_BlockSound; plugin_info_sound_funcs.pS_UnblockSound = SND_UnblockSound; return &plugin_info; } void SNDDMA_BlockSound (void) { } void SNDDMA_UnblockSound (void) { }