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https://github.com/yquake2/yquake2remaster.git
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Das SDL Soundbackend komplett reimplementiert.
This commit is contained in:
Yamagi Burmeister
parent
dc930150cf
commit
86e7ecb0f4
1 changed files with 163 additions and 150 deletions
313
src/sdl/sound.c
313
src/sdl/sound.c
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@ -1,185 +1,198 @@
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/*
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#include <SDL.h>
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snd_sdl.c
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Sound code taken from SDLQuake and modified to work with Quake2
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Robert Bäuml 2001-12-25
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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$Id: snd_sdl.c,v 1.2 2002/02/09 20:29:38 relnev Exp $
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*/
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#include "SDL.h"
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#include "../client/header/client.h"
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#include "../client/header/client.h"
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#include "../client/sound/header/local.h"
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#include "../client/sound/header/local.h"
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static int snd_inited;
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/* Global stuff */
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static dma_t *shm;
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int snd_inited = 0;
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static int dmapos = 0;
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static int dmasize = 0;
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static dma_t *dmabackend;
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static void
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/* The callback */
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paint_audio (void *unused, Uint8 * stream, int len)
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static void
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sdl_audio_callback(void *data, Uint8 *stream, int length)
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{
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{
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if (shm) {
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int length1;
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shm->buffer = stream;
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int length2;
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shm->samplepos += len / (shm->samplebits / 4);
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int pos = (dmapos * (dmabackend->samplebits / 8));
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// Check for samplepos overflow?
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S_PaintChannels (shm->samplepos);
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if (pos >= dmasize)
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{
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dmapos = pos = 0;
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}
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/* This can't happen! */
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if (!snd_inited)
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{
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memset(stream, '\0', length);
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return;
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}
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int tobufferend = dmasize - pos;
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if (length > tobufferend)
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{
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length1 = tobufferend;
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length2 = length - length1;
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}
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else
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{
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length1= length;
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length2 = 0;
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}
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memcpy(stream, dmabackend->buffer + pos, length1);
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/* Set new position */
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if (length2 <= 0)
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{
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dmapos += (length1 / (dmabackend->samplebits / 8));
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}
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else
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{
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memcpy(stream + length1, dmabackend->buffer, length2);
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dmapos = (length2 / (dmabackend->samplebits / 8));
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}
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if (dmapos >= dmasize)
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{
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dmapos = 0;
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}
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}
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}
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}
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qboolean
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qboolean
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SNDDMA_Init (void)
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SNDDMA_Init(void)
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{
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{
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SDL_AudioSpec desired, obtained;
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char drivername[128];
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int desired_bits, freq;
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SDL_AudioSpec desired;
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SDL_AudioSpec optained;
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if (SDL_WasInit(SDL_INIT_EVERYTHING) == 0) {
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if (SDL_Init(SDL_INIT_AUDIO) < 0) {
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Com_Printf ("Couldn't init SDL audio: %s\n", SDL_GetError ());
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return 0;
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}
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} else if (SDL_WasInit(SDL_INIT_AUDIO) == 0) {
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if (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0) {
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Com_Printf ("Couldn't init SDL audio: %s\n", SDL_GetError ());
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return 0;
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}
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}
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snd_inited = 0;
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desired_bits = (Cvar_Get("sndbits", "16", CVAR_ARCHIVE))->value;
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/* Set up the desired format */
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/* This should never happen,
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freq = (Cvar_Get("s_khz", "0", CVAR_ARCHIVE))->value;
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but this is Quake 2 ... */
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if (freq == 44)
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if (snd_inited)
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desired.freq = 44100;
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{
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else if (freq == 22)
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return 1;
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desired.freq = 22050;
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}
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else
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desired.freq = 11025;
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int sndbits = (Cvar_Get("sndbits", "16", CVAR_ARCHIVE))->value;
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int sndfreq = (Cvar_Get("s_khz", "0", CVAR_ARCHIVE))->value;
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switch (desired_bits) {
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int sndchans = (Cvar_Get("sndchannels", "2", CVAR_ARCHIVE))->value;
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case 8:
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desired.format = AUDIO_U8;
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if (!SDL_WasInit(SDL_INIT_AUDIO))
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break;
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{
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case 16:
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if (SDL_Init(SDL_INIT_AUDIO) == -1)
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if (SDL_BYTEORDER == SDL_BIG_ENDIAN)
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{
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desired.format = AUDIO_S16MSB;
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Com_Printf ("Couldn't init SDL audio: %s\n", SDL_GetError ());
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else
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return 0;
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desired.format = AUDIO_S16LSB;
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}
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break;
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default:
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Com_Printf ("Unknown number of audio bits: %d\n", desired_bits);
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return 0;
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}
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}
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desired.channels = (Cvar_Get("sndchannels", "2", CVAR_ARCHIVE))->value;
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if (desired.freq == 44100)
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if (SDL_AudioDriverName(drivername, sizeof(drivername)) == NULL)
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desired.samples = 2048;
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{
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else if (desired.freq == 22050)
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strcpy(drivername, "(UNKNOW)");
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desired.samples = 1024;
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}
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else
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Com_Printf("SDL audio driver is \"%s\"\n", drivername);
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memset(&desired, '\0', sizeof(desired));
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memset(&optained, '\0', sizeof(optained));
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/* Users are stupid */
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if ((sndbits != 16) && (sndbits != 8))
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{
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sndbits = 16;
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}
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if (sndfreq == 22)
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{
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desired.freq = 22050;
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}
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else if (sndfreq == 11)
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{
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desired.freq = 11025;
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}
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desired.format = ((sndbits == 16) ? AUDIO_S16SYS : AUDIO_U8);
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if (desired.freq <= 11025)
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{
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desired.samples = 256;
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}
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else if (desired.freq <= 22050)
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{
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desired.samples = 512;
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desired.samples = 512;
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}
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desired.callback = paint_audio;
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else
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{
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/* Open the audio device */
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desired.samples = 2048;
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if (SDL_OpenAudio (&desired, &obtained) < 0) {
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}
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Com_Printf ("Couldn't open SDL audio: %s\n", SDL_GetError ());
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desired.channels = sndchans;
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desired.callback = sdl_audio_callback;
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/* Okay, let's try our luck */
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if (SDL_OpenAudio(&desired, &optained) == -1)
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{
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Com_Printf("SDL_OpenAudio() failed: %s\n", SDL_GetError());
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SDL_QuitSubSystem(SDL_INIT_AUDIO);
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return 0;
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return 0;
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}
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}
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/* Make sure we can support the audio format */
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/* Don't pollute the frontend dma_t */
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switch (obtained.format) {
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dmabackend = &dma;
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case AUDIO_U8:
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/* Supported */
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dmapos = 0;
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break;
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dmabackend->samplebits = optained.format & 0xFF;
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case AUDIO_S16LSB:
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dmabackend->channels = optained.channels;
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case AUDIO_S16MSB:
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dmabackend->samples = 32768;
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if (((obtained.format == AUDIO_S16LSB) &&
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dmabackend->submission_chunk = 1;
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(SDL_BYTEORDER == SDL_LIL_ENDIAN)) ||
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dmabackend->speed = optained.freq;
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((obtained.format == AUDIO_S16MSB) &&
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dmasize = (dmabackend->samples * (dmabackend->samplebits / 8));
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(SDL_BYTEORDER == SDL_BIG_ENDIAN))) {
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dmabackend->buffer = calloc(1, dmasize);
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/* Supported */
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break;
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}
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/* Unsupported, fall through */ ;
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default:
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/* Not supported -- force SDL to do our bidding */
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SDL_CloseAudio ();
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if (SDL_OpenAudio (&desired, NULL) < 0) {
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Com_Printf ("Couldn't open SDL audio: %s\n", SDL_GetError ());
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return 0;
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}
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memcpy (&obtained, &desired, sizeof (desired));
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break;
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}
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SDL_PauseAudio (0);
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/* Fill the audio DMA information block */
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Com_Printf("Starting SDL audio callback...\n");
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shm = &dma;
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SDL_PauseAudio(0);
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shm->samplebits = (obtained.format & 0xFF);
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shm->speed = obtained.freq;
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shm->channels = obtained.channels;
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shm->samples = obtained.samples * shm->channels;
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shm->samplepos = 0;
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shm->submission_chunk = 1;
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shm->buffer = NULL;
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snd_inited = 1;
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Com_Printf("SDL audio initialized.\n");
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return 1;
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snd_inited = 1;
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return 1;
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}
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}
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int
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int
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SNDDMA_GetDMAPos (void)
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SNDDMA_GetDMAPos(void)
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{
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{
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return shm->samplepos;
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return dmapos;
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}
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}
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void
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void
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SNDDMA_Shutdown (void)
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SNDDMA_Shutdown(void)
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{
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{
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if (snd_inited) {
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Com_Printf("Closing SDL audio device...\n");
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SDL_CloseAudio ();
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SDL_PauseAudio(1);
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snd_inited = 0;
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SDL_CloseAudio();
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}
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SDL_QuitSubSystem(SDL_INIT_AUDIO);
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free(dmabackend->buffer);
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if (SDL_WasInit(SDL_INIT_EVERYTHING) == SDL_INIT_AUDIO)
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dmabackend->buffer = NULL;
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SDL_Quit();
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dmapos = dmasize = 0;
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else
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snd_inited = 0;
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SDL_QuitSubSystem(SDL_INIT_AUDIO);
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Com_Printf("SDL audio device shut down.\n");
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}
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}
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/*
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/*
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* This sends the sound to the device,
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SNDDMA_Submit
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* if the DMA isn't the device itself.
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* This shouldn't be the case on all PCI
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Send sound to device if buffer isn't really the dma buffer
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* and PCIe soundcards
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*/
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*/
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void
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void
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SNDDMA_Submit (void)
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SNDDMA_Submit(void)
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{
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{
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SDL_UnlockAudio();
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}
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}
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void
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void SNDDMA_BeginPainting(void)
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SNDDMA_BeginPainting(void)
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{
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{
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SDL_LockAudio();
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}
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}
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