diff options
Diffstat (limited to 'src/modules/oss/oss-util.c')
| -rw-r--r-- | src/modules/oss/oss-util.c | 418 |
1 files changed, 418 insertions, 0 deletions
diff --git a/src/modules/oss/oss-util.c b/src/modules/oss/oss-util.c new file mode 100644 index 0000000..42ee7f5 --- /dev/null +++ b/src/modules/oss/oss-util.c @@ -0,0 +1,418 @@ +/*** + 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 2.1 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, see <http://www.gnu.org/licenses/>. +***/ + +#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 <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; + char *t; + + pa_assert(device); + pa_assert(mode); + pa_assert(*mode == O_RDWR || *mode == O_RDONLY || *mode == O_WRONLY); + + if (!pcaps) + pcaps = ∩︀ + + if (*mode == O_RDWR) { + if ((fd = pa_open_cloexec(device, O_RDWR|O_NDELAY, 0)) >= 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 = pa_open_cloexec(device, (*mode = O_WRONLY)|O_NDELAY, 0)) < 0) { + if ((fd = pa_open_cloexec(device, (*mode = O_RDONLY)|O_NDELAY, 0)) < 0) { + pa_log("open('%s'): %s", device, pa_cstrerror(errno)); + goto fail; + } + } + } else { + if ((fd = pa_open_cloexec(device, *mode|O_NDELAY, 0)) < 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: + + t = pa_sprintf_malloc( + "%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_log_debug("capabilities:%s", t); + pa_xfree(t); + + 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_SAMPLE_S24LE] = AFMT_QUERY, /* not supported */ + [PA_SAMPLE_S24BE] = AFMT_QUERY, /* not supported */ + [PA_SAMPLE_S24_32LE] = AFMT_QUERY, /* not supported */ + [PA_SAMPLE_S24_32BE] = 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; +} + +int pa_oss_set_fragments(int fd, int nfrags, int frag_size) { + int arg; + + pa_assert(frag_size >= 0); + + arg = ((int) nfrags << 16) | pa_ulog2(frag_size); + + pa_log_debug("Asking for %i fragments of size %i (requested %i)", nfrags, 1 << pa_ulog2(frag_size), 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_VERBOSE_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] = PA_CLAMP_VOLUME(((vol & 0xFF) * PA_VOLUME_NORM) / 100); + + if (volume->channels >= 2) + volume->values[1] = PA_CLAMP_VOLUME((((vol >> 8) & 0xFF) * PA_VOLUME_NORM) / 100); + + pa_log_debug("Read mixer settings: %s", pa_cvolume_snprint_verbose(cv, sizeof(cv), volume, NULL, false)); + 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))) { +#ifdef ENOLINK + if (errno != EINVAL && errno != ENOLINK) { +#else + if (errno != EINVAL) { +#endif + 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 = pa_fopen_cloexec("/dev/sndstat", "r")) && + !(f = pa_fopen_cloexec("/proc/sndstat", "r")) && + !(f = pa_fopen_cloexec("/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 = pa_streq(line, "Audio devices:"); + 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 = pa_open_cloexec(mixer, O_RDWR|O_NDELAY, 0)) >= 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; +} |