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-rw-r--r--src/unix/linux_snd.c294
1 files changed, 294 insertions, 0 deletions
diff --git a/src/unix/linux_snd.c b/src/unix/linux_snd.c
new file mode 100644
index 00000000..51937695
--- /dev/null
+++ b/src/unix/linux_snd.c
@@ -0,0 +1,294 @@
+/*
+===========================================================================
+Copyright (C) 1999-2005 Id Software, Inc.
+
+This file is part of Quake III Arena source code.
+
+Quake III Arena source code 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.
+
+Quake III Arena source code 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 Quake III Arena source code; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+===========================================================================
+*/
+
+#if !USE_SDL_SOUND
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <sys/shm.h>
+#include <sys/wait.h>
+#ifdef __linux__ // rb0101023 - guard this
+#include <linux/soundcard.h>
+#endif
+#ifdef __FreeBSD__ // rb0101023 - added
+#include <sys/soundcard.h>
+#endif
+#include <stdio.h>
+
+#include "../qcommon/q_shared.h"
+#include "../client/snd_local.h"
+
+int audio_fd;
+int snd_inited=0;
+
+cvar_t *sndbits;
+cvar_t *sndspeed;
+cvar_t *sndchannels;
+
+cvar_t *snddevice;
+
+/* Some devices may work only with 48000 */
+static int tryrates[] = { 22050, 11025, 44100, 48000, 8000 };
+
+static qboolean use_custom_memset = qfalse;
+// https://zerowing.idsoftware.com/bugzilla/show_bug.cgi?id=371
+void Snd_Memset (void* dest, const int val, const size_t count)
+{
+ int *pDest;
+ int i, iterate;
+
+ if (!use_custom_memset)
+ {
+ Com_Memset(dest,val,count);
+ return;
+ }
+ iterate = count / sizeof(int);
+ pDest = (int*)dest;
+ for(i=0; i<iterate; i++)
+ {
+ pDest[i] = val;
+ }
+}
+
+qboolean SNDDMA_Init(void)
+{
+ int rc;
+ int fmt;
+ int tmp;
+ int i;
+ // char *s; // bk001204 - unused
+ struct audio_buf_info info;
+ int caps;
+
+ if (snd_inited)
+ return 1;
+
+ if (!snddevice) {
+ sndbits = Cvar_Get("sndbits", "16", CVAR_ARCHIVE);
+ sndspeed = Cvar_Get("sndspeed", "0", CVAR_ARCHIVE);
+ sndchannels = Cvar_Get("sndchannels", "2", CVAR_ARCHIVE);
+ snddevice = Cvar_Get("snddevice", "/dev/dsp", CVAR_ARCHIVE);
+ }
+
+ // open /dev/dsp, confirm capability to mmap, and get size of dma buffer
+ if (!audio_fd) {
+ audio_fd = open(snddevice->string, O_RDWR);
+
+ if (audio_fd < 0) {
+ perror(snddevice->string);
+ Com_Printf("Could not open %s\n", snddevice->string);
+ return 0;
+ }
+ }
+
+ if (ioctl(audio_fd, SNDCTL_DSP_GETCAPS, &caps) == -1) {
+ perror(snddevice->string);
+ Com_Printf("Sound driver too old\n");
+ close(audio_fd);
+ return 0;
+ }
+
+ if (!(caps & DSP_CAP_TRIGGER) || !(caps & DSP_CAP_MMAP)) {
+ Com_Printf("Sorry but your soundcard can't do this\n");
+ close(audio_fd);
+ return 0;
+ }
+
+
+ /* SNDCTL_DSP_GETOSPACE moved to be called later */
+
+ // set sample bits & speed
+ dma.samplebits = (int)sndbits->value;
+ if (dma.samplebits != 16 && dma.samplebits != 8) {
+ ioctl(audio_fd, SNDCTL_DSP_GETFMTS, &fmt);
+ if (fmt & AFMT_S16_LE)
+ dma.samplebits = 16;
+ else if (fmt & AFMT_U8)
+ dma.samplebits = 8;
+ }
+
+ dma.speed = (int)sndspeed->value;
+ if (!dma.speed) {
+ for (i=0 ; i<sizeof(tryrates)/4 ; i++)
+ if (!ioctl(audio_fd, SNDCTL_DSP_SPEED, &tryrates[i]))
+ break;
+ dma.speed = tryrates[i];
+ }
+
+ dma.channels = (int)sndchannels->value;
+ if (dma.channels < 1 || dma.channels > 2)
+ dma.channels = 2;
+
+/* mmap() call moved forward */
+
+ tmp = 0;
+ if (dma.channels == 2)
+ tmp = 1;
+ rc = ioctl(audio_fd, SNDCTL_DSP_STEREO, &tmp);
+ if (rc < 0) {
+ perror(snddevice->string);
+ Com_Printf("Could not set %s to stereo=%d", snddevice->string, dma.channels);
+ close(audio_fd);
+ return 0;
+ }
+
+ if (tmp)
+ dma.channels = 2;
+ else
+ dma.channels = 1;
+
+ rc = ioctl(audio_fd, SNDCTL_DSP_SPEED, &dma.speed);
+ if (rc < 0) {
+ perror(snddevice->string);
+ Com_Printf("Could not set %s speed to %d", snddevice->string, dma.speed);
+ close(audio_fd);
+ return 0;
+ }
+
+ if (dma.samplebits == 16) {
+ rc = AFMT_S16_LE;
+ rc = ioctl(audio_fd, SNDCTL_DSP_SETFMT, &rc);
+ if (rc < 0) {
+ perror(snddevice->string);
+ Com_Printf("Could not support 16-bit data. Try 8-bit.\n");
+ close(audio_fd);
+ return 0;
+ }
+ } else if (dma.samplebits == 8) {
+ rc = AFMT_U8;
+ rc = ioctl(audio_fd, SNDCTL_DSP_SETFMT, &rc);
+ if (rc < 0) {
+ perror(snddevice->string);
+ Com_Printf("Could not support 8-bit data.\n");
+ close(audio_fd);
+ return 0;
+ }
+ } else {
+ perror(snddevice->string);
+ Com_Printf("%d-bit sound not supported.", dma.samplebits);
+ close(audio_fd);
+ return 0;
+ }
+
+ if (ioctl(audio_fd, SNDCTL_DSP_GETOSPACE, &info)==-1) {
+ perror("GETOSPACE");
+ Com_Printf("Um, can't do GETOSPACE?\n");
+ close(audio_fd);
+ return 0;
+ }
+
+ dma.samples = info.fragstotal * info.fragsize / (dma.samplebits/8);
+ dma.submission_chunk = 1;
+
+ // memory map the dma buffer
+
+ // TTimo 2001/10/08 added PROT_READ to the mmap
+ // https://zerowing.idsoftware.com/bugzilla/show_bug.cgi?id=371
+ // checking Alsa bug, doesn't allow dma alloc with PROT_READ?
+
+ if (!dma.buffer)
+ dma.buffer = (unsigned char *) mmap(NULL, info.fragstotal
+ * info.fragsize, PROT_WRITE|PROT_READ, MAP_FILE|MAP_SHARED, audio_fd, 0);
+
+ if (dma.buffer == MAP_FAILED)
+ {
+ Com_Printf("Could not mmap dma buffer PROT_WRITE|PROT_READ\n");
+ Com_Printf("trying mmap PROT_WRITE (with associated better compatibility / less performance code)\n");
+ dma.buffer = (unsigned char *) mmap(NULL, info.fragstotal
+ * info.fragsize, PROT_WRITE, MAP_FILE|MAP_SHARED, audio_fd, 0);
+ // NOTE TTimo could add a variable to force using regular memset on systems that are known to be safe
+ use_custom_memset = qtrue;
+ }
+
+ if (dma.buffer == MAP_FAILED) {
+ perror(snddevice->string);
+ Com_Printf("Could not mmap %s\n", snddevice->string);
+ close(audio_fd);
+ return 0;
+ }
+
+ // toggle the trigger & start her up
+
+ tmp = 0;
+ rc = ioctl(audio_fd, SNDCTL_DSP_SETTRIGGER, &tmp);
+ if (rc < 0) {
+ perror(snddevice->string);
+ Com_Printf("Could not toggle.\n");
+ close(audio_fd);
+ return 0;
+ }
+
+ tmp = PCM_ENABLE_OUTPUT;
+ rc = ioctl(audio_fd, SNDCTL_DSP_SETTRIGGER, &tmp);
+ if (rc < 0) {
+ perror(snddevice->string);
+ Com_Printf("Could not toggle.\n");
+ close(audio_fd);
+
+ return 0;
+ }
+
+ snd_inited = 1;
+ return 1;
+}
+
+int SNDDMA_GetDMAPos(void)
+{
+ struct count_info count;
+
+ if (!snd_inited) return 0;
+
+ if (ioctl(audio_fd, SNDCTL_DSP_GETOPTR, &count) == -1) {
+ perror(snddevice->string);
+ Com_Printf("Uh, sound dead.\n");
+ close(audio_fd);
+ snd_inited = 0;
+ return 0;
+ }
+ return count.ptr / (dma.samplebits / 8);
+}
+
+void SNDDMA_Shutdown(void)
+{
+}
+
+/*
+==============
+SNDDMA_Submit
+
+Send sound to device if buffer isn't really the dma buffer
+===============
+*/
+void SNDDMA_Submit(void)
+{
+}
+
+void SNDDMA_BeginPainting (void)
+{
+}
+
+#endif // !USE_SDL_SOUND
+
generated by cgit (git 2.34.1) at 2024-11-14 22:44:25 +0000