move alsa-util.[ch], oss-util.[ch] and howl-wrap.[ch] to the modules directory since they are just helper source used exclusively by the modules

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@489 fefdeb5f-60dc-0310-8127-8f9354f1896f

src/modules/oss-util.c

@@ -0,0 +1,168 @@
+/* $Id$ */
+
+/***
+  This file is part of polypaudio.
+ 
+  polypaudio 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 of the License,
+  or (at your option) any later version.
+ 
+  polypaudio 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 Lesser General Public License
+  along with polypaudio; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <assert.h>
+#include <sys/soundcard.h>
+#include <sys/ioctl.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include <polypcore/util.h>
+#include <polypcore/log.h>
+
+#include "oss-util.h"
+
+int pa_oss_open(const char *device, int *mode, int* pcaps) {
+    int fd = -1;
+    assert(device && mode && (*mode == O_RDWR || *mode == O_RDONLY || *mode == O_WRONLY));
+
+    if (*mode == O_RDWR) {
+        if ((fd = open(device, O_RDWR|O_NDELAY)) >= 0) {
+            int dcaps, *tcaps;
+            ioctl(fd, SNDCTL_DSP_SETDUPLEX, 0);
+
+            tcaps = pcaps ? pcaps : &dcaps;
+            
+            if (ioctl(fd, SNDCTL_DSP_GETCAPS, tcaps) < 0) {
+                pa_log(__FILE__": SNDCTL_DSP_GETCAPS: %s\n", strerror(errno));
+                goto fail;
+            }
+
+            if (*tcaps & DSP_CAP_DUPLEX)
+                return fd;
+
+            goto fail;
+        }
+        
+        if ((fd = open(device, (*mode = O_WRONLY)|O_NDELAY)) < 0) {
+            if ((fd = open(device, (*mode = O_RDONLY)|O_NDELAY)) < 0) {
+                pa_log(__FILE__": open('%s'): %s\n", device, strerror(errno));
+                goto fail;
+            }
+        }
+    } else {
+        if ((fd = open(device, *mode|O_NDELAY)) < 0) {
+            pa_log(__FILE__": open('%s'): %s\n", device, strerror(errno));
+            goto fail;
+        }
+    } 
+
+    if (pcaps) {
+        if (ioctl(fd, SNDCTL_DSP_GETCAPS, pcaps) < 0) {
+            pa_log(__FILE__": SNDCTL_DSP_GETCAPS: %s\n", strerror(errno));
+            goto fail;
+        }
+    }
+
+    pa_fd_set_cloexec(fd, 1);
+    
+    return fd;
+
+fail:
+    if (fd >= 0)
+        close(fd);
+    return -1;
+}
+
+int pa_oss_auto_format(int fd, pa_sample_spec *ss) {
+    int format, channels, speed, reqformat;
+    static const int format_trans[PA_SAMPLE_MAX] = {
+        [PA_SAMPLE_U8] = AFMT_U8,
+        [PA_SAMPLE_ALAW] = AFMT_A_LAW,
+        [PA_SAMPLE_ULAW] = AFMT_MU_LAW,
+        [PA_SAMPLE_S16LE] = AFMT_S16_LE,
+        [PA_SAMPLE_S16BE] = AFMT_S16_BE,
+        [PA_SAMPLE_FLOAT32LE] = AFMT_QUERY, /* not supported */
+        [PA_SAMPLE_FLOAT32BE] = AFMT_QUERY, /* not supported */
+    };
+
+    assert(fd >= 0 && ss);
+
+    reqformat = format = format_trans[ss->format];
+    if (reqformat == AFMT_QUERY || ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != reqformat) {
+        format = AFMT_S16_NE;
+        if (ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != AFMT_S16_NE) {
+            int f = AFMT_S16_NE == AFMT_S16_LE ? AFMT_S16_BE : AFMT_S16_LE;
+            format = f;
+            if (ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != f) {
+                format = AFMT_U8;
+                if (ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != AFMT_U8) {
+                    pa_log(__FILE__": SNDCTL_DSP_SETFMT: %s\n", format != AFMT_U8 ? "No supported sample format" : strerror(errno));
+                    return -1;
+                } else
+                    ss->format = PA_SAMPLE_U8;
+            } else
+                ss->format = f == AFMT_S16_LE ? PA_SAMPLE_S16LE : PA_SAMPLE_S16BE;
+        } else
+            ss->format = PA_SAMPLE_S16NE;
+    }
+        
+    channels = ss->channels;
+    if (ioctl(fd, SNDCTL_DSP_CHANNELS, &channels) < 0) {
+        pa_log(__FILE__": SNDCTL_DSP_CHANNELS: %s\n", strerror(errno));
+        return -1;
+    }
+    assert(channels);
+    ss->channels = channels;
+
+    speed = ss->rate;
+    if (ioctl(fd, SNDCTL_DSP_SPEED, &speed) < 0) {
+        pa_log(__FILE__": SNDCTL_DSP_SPEED: %s\n", strerror(errno));
+        return -1;
+    }
+    assert(speed);
+    ss->rate = speed;
+
+    return 0;
+}
+
+static int simple_log2(int v) {
+    int k = 0;
+
+    for (;;) {
+        v >>= 1;
+        if (!v) break;
+        k++;
+    }
+    
+    return k;
+}
+
+int pa_oss_set_fragments(int fd, int nfrags, int frag_size) {
+    int arg;
+    arg = ((int) nfrags << 16) | simple_log2(frag_size);
+    
+    if (ioctl(fd, SNDCTL_DSP_SETFRAGMENT, &arg) < 0) {
+        pa_log(__FILE__": SNDCTL_DSP_SETFRAGMENT: %s\n", strerror(errno));
+        return -1;
+    }
+
+    return 0;
+}