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-rw-r--r--src/modules/oss-util.c168
1 files changed, 168 insertions, 0 deletions
diff --git a/src/modules/oss-util.c b/src/modules/oss-util.c
new file mode 100644
index 00000000..e9a133f5
--- /dev/null
+++ b/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;
+}