summaryrefslogtreecommitdiffstats
path: root/src/modules/oss/oss-util.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/modules/oss/oss-util.c')
-rw-r--r--src/modules/oss/oss-util.c417
1 files changed, 417 insertions, 0 deletions
diff --git a/src/modules/oss/oss-util.c b/src/modules/oss/oss-util.c
new file mode 100644
index 00000000..f766030d
--- /dev/null
+++ b/src/modules/oss/oss-util.c
@@ -0,0 +1,417 @@
+/***
+ This file is part of PulseAudio.
+
+ Copyright 2004-2006 Lennart Poettering
+ Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
+
+ PulseAudio 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.
+
+ PulseAudio 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 PulseAudio; 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 <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 <pulse/xmalloc.h>
+#include <pulsecore/core-error.h>
+#include <pulsecore/core-util.h>
+#include <pulsecore/log.h>
+#include <pulsecore/macro.h>
+
+#include "oss-util.h"
+
+int pa_oss_open(const char *device, int *mode, int* pcaps) {
+ int fd = -1;
+ int caps;
+
+ pa_assert(device);
+ pa_assert(mode);
+ pa_assert(*mode == O_RDWR || *mode == O_RDONLY || *mode == O_WRONLY);
+
+ if(!pcaps)
+ pcaps = &caps;
+
+ if (*mode == O_RDWR) {
+ if ((fd = open(device, O_RDWR|O_NDELAY|O_NOCTTY)) >= 0) {
+ ioctl(fd, SNDCTL_DSP_SETDUPLEX, 0);
+
+ if (ioctl(fd, SNDCTL_DSP_GETCAPS, pcaps) < 0) {
+ pa_log("SNDCTL_DSP_GETCAPS: %s", pa_cstrerror(errno));
+ goto fail;
+ }
+
+ if (*pcaps & DSP_CAP_DUPLEX)
+ goto success;
+
+ pa_log_warn("'%s' doesn't support full duplex", device);
+
+ pa_close(fd);
+ }
+
+ if ((fd = open(device, (*mode = O_WRONLY)|O_NDELAY|O_NOCTTY)) < 0) {
+ if ((fd = open(device, (*mode = O_RDONLY)|O_NDELAY|O_NOCTTY)) < 0) {
+ pa_log("open('%s'): %s", device, pa_cstrerror(errno));
+ goto fail;
+ }
+ }
+ } else {
+ if ((fd = open(device, *mode|O_NDELAY|O_NOCTTY)) < 0) {
+ pa_log("open('%s'): %s", device, pa_cstrerror(errno));
+ goto fail;
+ }
+ }
+
+ *pcaps = 0;
+
+ if (ioctl(fd, SNDCTL_DSP_GETCAPS, pcaps) < 0) {
+ pa_log("SNDCTL_DSP_GETCAPS: %s", pa_cstrerror(errno));
+ goto fail;
+ }
+
+success:
+
+ pa_log_debug("capabilities:%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
+ *pcaps & DSP_CAP_BATCH ? " BATCH" : "",
+#ifdef DSP_CAP_BIND
+ *pcaps & DSP_CAP_BIND ? " BIND" : "",
+#else
+ "",
+#endif
+ *pcaps & DSP_CAP_COPROC ? " COPROC" : "",
+ *pcaps & DSP_CAP_DUPLEX ? " DUPLEX" : "",
+#ifdef DSP_CAP_FREERATE
+ *pcaps & DSP_CAP_FREERATE ? " FREERATE" : "",
+#else
+ "",
+#endif
+#ifdef DSP_CAP_INPUT
+ *pcaps & DSP_CAP_INPUT ? " INPUT" : "",
+#else
+ "",
+#endif
+ *pcaps & DSP_CAP_MMAP ? " MMAP" : "",
+#ifdef DSP_CAP_MODEM
+ *pcaps & DSP_CAP_MODEM ? " MODEM" : "",
+#else
+ "",
+#endif
+#ifdef DSP_CAP_MULTI
+ *pcaps & DSP_CAP_MULTI ? " MULTI" : "",
+#else
+ "",
+#endif
+#ifdef DSP_CAP_OUTPUT
+ *pcaps & DSP_CAP_OUTPUT ? " OUTPUT" : "",
+#else
+ "",
+#endif
+ *pcaps & DSP_CAP_REALTIME ? " REALTIME" : "",
+#ifdef DSP_CAP_SHADOW
+ *pcaps & DSP_CAP_SHADOW ? " SHADOW" : "",
+#else
+ "",
+#endif
+#ifdef DSP_CAP_VIRTUAL
+ *pcaps & DSP_CAP_VIRTUAL ? " VIRTUAL" : "",
+#else
+ "",
+#endif
+ *pcaps & DSP_CAP_TRIGGER ? " TRIGGER" : "");
+
+ pa_make_fd_cloexec(fd);
+
+ return fd;
+
+fail:
+ if (fd >= 0)
+ pa_close(fd);
+ return -1;
+}
+
+int pa_oss_auto_format(int fd, pa_sample_spec *ss) {
+ int format, channels, speed, reqformat;
+ pa_sample_format_t orig_format;
+
+ 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 */
+ [PA_SAMPLE_S32LE] = AFMT_QUERY, /* not supported */
+ [PA_SAMPLE_S32BE] = AFMT_QUERY, /* not supported */
+ };
+
+ pa_assert(fd >= 0);
+ pa_assert(ss);
+
+ orig_format = ss->format;
+
+ 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("SNDCTL_DSP_SETFMT: %s", format != AFMT_U8 ? "No supported sample format" : pa_cstrerror(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;
+ }
+
+ if (orig_format != ss->format)
+ pa_log_warn("device doesn't support sample format %s, changed to %s.",
+ pa_sample_format_to_string(orig_format),
+ pa_sample_format_to_string(ss->format));
+
+ channels = ss->channels;
+ if (ioctl(fd, SNDCTL_DSP_CHANNELS, &channels) < 0) {
+ pa_log("SNDCTL_DSP_CHANNELS: %s", pa_cstrerror(errno));
+ return -1;
+ }
+ pa_assert(channels > 0);
+
+ if (ss->channels != channels) {
+ pa_log_warn("device doesn't support %i channels, using %i channels.", ss->channels, channels);
+ ss->channels = (uint8_t) channels;
+ }
+
+ speed = (int) ss->rate;
+ if (ioctl(fd, SNDCTL_DSP_SPEED, &speed) < 0) {
+ pa_log("SNDCTL_DSP_SPEED: %s", pa_cstrerror(errno));
+ return -1;
+ }
+ pa_assert(speed > 0);
+
+ if (ss->rate != (unsigned) speed) {
+ pa_log_warn("device doesn't support %i Hz, changed to %i Hz.", ss->rate, speed);
+
+ /* If the sample rate deviates too much, we need to resample */
+ if (speed < ss->rate*.95 || speed > ss->rate*1.05)
+ ss->rate = (uint32_t) 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("SNDCTL_DSP_SETFRAGMENT: %s", pa_cstrerror(errno));
+ return -1;
+ }
+
+ return 0;
+}
+
+int pa_oss_get_volume(int fd, unsigned long mixer, const pa_sample_spec *ss, pa_cvolume *volume) {
+ char cv[PA_CVOLUME_SNPRINT_MAX];
+ unsigned vol;
+
+ pa_assert(fd >= 0);
+ pa_assert(ss);
+ pa_assert(volume);
+
+ if (ioctl(fd, mixer, &vol) < 0)
+ return -1;
+
+ pa_cvolume_reset(volume, ss->channels);
+
+ volume->values[0] = ((vol & 0xFF) * PA_VOLUME_NORM) / 100;
+
+ if (volume->channels >= 2)
+ volume->values[1] = (((vol >> 8) & 0xFF) * PA_VOLUME_NORM) / 100;
+
+ pa_log_debug("Read mixer settings: %s", pa_cvolume_snprint(cv, sizeof(cv), volume));
+ return 0;
+}
+
+int pa_oss_set_volume(int fd, unsigned long mixer, const pa_sample_spec *ss, const pa_cvolume *volume) {
+ char cv[PA_CVOLUME_SNPRINT_MAX];
+ unsigned vol;
+ pa_volume_t l, r;
+
+ l = volume->values[0] > PA_VOLUME_NORM ? PA_VOLUME_NORM : volume->values[0];
+
+ vol = (l*100)/PA_VOLUME_NORM;
+
+ if (ss->channels >= 2) {
+ r = volume->values[1] > PA_VOLUME_NORM ? PA_VOLUME_NORM : volume->values[1];
+ vol |= ((r*100)/PA_VOLUME_NORM) << 8;
+ }
+
+ if (ioctl(fd, mixer, &vol) < 0)
+ return -1;
+
+ pa_log_debug("Wrote mixer settings: %s", pa_cvolume_snprint(cv, sizeof(cv), volume));
+ return 0;
+}
+
+static int get_device_number(const char *dev) {
+ const char *p, *e;
+ char *rp = NULL;
+ int r;
+
+ if (!(p = rp = pa_readlink(dev))) {
+ if (errno != EINVAL && errno != ENOLINK) {
+ r = -1;
+ goto finish;
+ }
+
+ p = dev;
+ }
+
+ if ((e = strrchr(p, '/')))
+ p = e+1;
+
+ if (p == 0) {
+ r = 0;
+ goto finish;
+ }
+
+ p = strchr(p, 0) -1;
+
+ if (*p >= '0' && *p <= '9') {
+ r = *p - '0';
+ goto finish;
+ }
+
+ r = -1;
+
+finish:
+ pa_xfree(rp);
+ return r;
+}
+
+int pa_oss_get_hw_description(const char *dev, char *name, size_t l) {
+ FILE *f;
+ int n, r = -1;
+ int b = 0;
+
+ if ((n = get_device_number(dev)) < 0)
+ return -1;
+
+ if (!(f = fopen("/dev/sndstat", "r")) &&
+ !(f = fopen("/proc/sndstat", "r")) &&
+ !(f = fopen("/proc/asound/oss/sndstat", "r"))) {
+
+ if (errno != ENOENT)
+ pa_log_warn("failed to open OSS sndstat device: %s", pa_cstrerror(errno));
+
+ return -1;
+ }
+
+ while (!feof(f)) {
+ char line[64];
+ int device;
+
+ if (!fgets(line, sizeof(line), f))
+ break;
+
+ line[strcspn(line, "\r\n")] = 0;
+
+ if (!b) {
+ b = strcmp(line, "Audio devices:") == 0;
+ continue;
+ }
+
+ if (line[0] == 0)
+ break;
+
+ if (sscanf(line, "%i: ", &device) != 1)
+ continue;
+
+ if (device == n) {
+ char *k = strchr(line, ':');
+ pa_assert(k);
+ k++;
+ k += strspn(k, " ");
+
+ if (pa_endswith(k, " (DUPLEX)"))
+ k[strlen(k)-9] = 0;
+
+ pa_strlcpy(name, k, l);
+ r = 0;
+ break;
+ }
+ }
+
+ fclose(f);
+ return r;
+}
+
+static int open_mixer(const char *mixer) {
+ int fd;
+
+ if ((fd = open(mixer, O_RDWR|O_NDELAY|O_NOCTTY)) >= 0)
+ return fd;
+
+ return -1;
+}
+
+int pa_oss_open_mixer_for_device(const char *device) {
+ int n;
+ char *fn;
+ int fd;
+
+ if ((n = get_device_number(device)) < 0)
+ return -1;
+
+ if (n == 0)
+ if ((fd = open_mixer("/dev/mixer")) >= 0)
+ return fd;
+
+ fn = pa_sprintf_malloc("/dev/mixer%i", n);
+ fd = open_mixer(fn);
+ pa_xfree(fn);
+
+ if (fd < 0)
+ pa_log_warn("Failed to open mixer '%s': %s", device, pa_cstrerror(errno));
+
+ return fd;
+}