/* $Id$ */
/***
- This file is part of polypaudio.
-
- polypaudio is free software; you can redistribute it and/or modify
+ 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.
-
- polypaudio is distributed in the hope that it will be useful, but
+
+ 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 polypaudio; if not, write to the Free Software
+ along with PulseAudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#include <sys/types.h>
#include <asoundlib.h>
-#include <polyp/sample.h>
-#include <polypcore/xmalloc.h>
-#include <polypcore/log.h>
+#include <pulse/sample.h>
+#include <pulse/xmalloc.h>
+
+#include <pulsecore/log.h>
+#include <pulsecore/macro.h>
#include "alsa-util.h"
-/* Set the hardware parameters of the given ALSA device. Returns the
- * selected fragment settings in *period and *period_size */
-int pa_alsa_set_hw_params(snd_pcm_t *pcm_handle, const pa_sample_spec *ss, uint32_t *periods, snd_pcm_uframes_t *period_size) {
- int ret = -1;
- snd_pcm_uframes_t buffer_size;
- snd_pcm_hw_params_t *hwparams = NULL;
- unsigned int r = ss->rate;
-
+struct pa_alsa_fdlist {
+ int num_fds;
+ struct pollfd *fds;
+ /* This is a temporary buffer used to avoid lots of mallocs */
+ struct pollfd *work_fds;
+
+ snd_mixer_t *mixer;
+
+ pa_mainloop_api *m;
+ pa_defer_event *defer;
+ pa_io_event **ios;
+
+ int polled;
+
+ void (*cb)(void *userdata);
+ void *userdata;
+};
+
+static void io_cb(pa_mainloop_api*a, pa_io_event* e, PA_GCC_UNUSED int fd, pa_io_event_flags_t events, void *userdata) {
+
+ struct pa_alsa_fdlist *fdl = userdata;
+ int err, i;
+ unsigned short revents;
+
+ pa_assert(a);
+ pa_assert(fdl);
+ pa_assert(fdl->mixer);
+ pa_assert(fdl->fds);
+ pa_assert(fdl->work_fds);
+
+ if (fdl->polled)
+ return;
+
+ fdl->polled = 1;
+
+ memcpy(fdl->work_fds, fdl->fds, sizeof(struct pollfd) * fdl->num_fds);
+
+ for (i = 0;i < fdl->num_fds; i++) {
+ if (e == fdl->ios[i]) {
+ if (events & PA_IO_EVENT_INPUT)
+ fdl->work_fds[i].revents |= POLLIN;
+ if (events & PA_IO_EVENT_OUTPUT)
+ fdl->work_fds[i].revents |= POLLOUT;
+ if (events & PA_IO_EVENT_ERROR)
+ fdl->work_fds[i].revents |= POLLERR;
+ if (events & PA_IO_EVENT_HANGUP)
+ fdl->work_fds[i].revents |= POLLHUP;
+ break;
+ }
+ }
+
+ pa_assert(i != fdl->num_fds);
+
+ if ((err = snd_mixer_poll_descriptors_revents(fdl->mixer, fdl->work_fds, fdl->num_fds, &revents)) < 0) {
+ pa_log_error("Unable to get poll revent: %s", snd_strerror(err));
+ return;
+ }
+
+ a->defer_enable(fdl->defer, 1);
+
+ if (revents)
+ snd_mixer_handle_events(fdl->mixer);
+}
+
+static void defer_cb(pa_mainloop_api*a, PA_GCC_UNUSED pa_defer_event* e, void *userdata) {
+ struct pa_alsa_fdlist *fdl = userdata;
+ int num_fds, i, err;
+ struct pollfd *temp;
+
+ pa_assert(a);
+ pa_assert(fdl);
+ pa_assert(fdl->mixer);
+
+ a->defer_enable(fdl->defer, 0);
+
+ num_fds = snd_mixer_poll_descriptors_count(fdl->mixer);
+ pa_assert(num_fds > 0);
+
+ if (num_fds != fdl->num_fds) {
+ if (fdl->fds)
+ pa_xfree(fdl->fds);
+ if (fdl->work_fds)
+ pa_xfree(fdl->work_fds);
+ fdl->fds = pa_xnew0(struct pollfd, num_fds);
+ fdl->work_fds = pa_xnew(struct pollfd, num_fds);
+ }
+
+ memset(fdl->work_fds, 0, sizeof(struct pollfd) * num_fds);
+
+ if ((err = snd_mixer_poll_descriptors(fdl->mixer, fdl->work_fds, num_fds)) < 0) {
+ pa_log_error("Unable to get poll descriptors: %s", snd_strerror(err));
+ return;
+ }
+
+ fdl->polled = 0;
+
+ if (memcmp(fdl->fds, fdl->work_fds, sizeof(struct pollfd) * num_fds) == 0)
+ return;
+
+ if (fdl->ios) {
+ for (i = 0; i < fdl->num_fds; i++)
+ a->io_free(fdl->ios[i]);
+
+ if (num_fds != fdl->num_fds) {
+ pa_xfree(fdl->ios);
+ fdl->ios = NULL;
+ }
+ }
+
+ if (!fdl->ios)
+ fdl->ios = pa_xnew(pa_io_event*, num_fds);
+
+ /* Swap pointers */
+ temp = fdl->work_fds;
+ fdl->work_fds = fdl->fds;
+ fdl->fds = temp;
+
+ fdl->num_fds = num_fds;
+
+ for (i = 0;i < num_fds;i++)
+ fdl->ios[i] = a->io_new(a, fdl->fds[i].fd,
+ ((fdl->fds[i].events & POLLIN) ? PA_IO_EVENT_INPUT : 0) |
+ ((fdl->fds[i].events & POLLOUT) ? PA_IO_EVENT_OUTPUT : 0),
+ io_cb, fdl);
+}
+
+struct pa_alsa_fdlist *pa_alsa_fdlist_new(void) {
+ struct pa_alsa_fdlist *fdl;
+
+ fdl = pa_xnew0(struct pa_alsa_fdlist, 1);
+
+ fdl->num_fds = 0;
+ fdl->fds = NULL;
+ fdl->work_fds = NULL;
+ fdl->mixer = NULL;
+ fdl->m = NULL;
+ fdl->defer = NULL;
+ fdl->ios = NULL;
+ fdl->polled = 0;
+
+ return fdl;
+}
+
+void pa_alsa_fdlist_free(struct pa_alsa_fdlist *fdl) {
+ pa_assert(fdl);
+
+ if (fdl->defer) {
+ pa_assert(fdl->m);
+ fdl->m->defer_free(fdl->defer);
+ }
+
+ if (fdl->ios) {
+ int i;
+ pa_assert(fdl->m);
+ for (i = 0;i < fdl->num_fds;i++)
+ fdl->m->io_free(fdl->ios[i]);
+ pa_xfree(fdl->ios);
+ }
+
+ if (fdl->fds)
+ pa_xfree(fdl->fds);
+ if (fdl->work_fds)
+ pa_xfree(fdl->work_fds);
+
+ pa_xfree(fdl);
+}
+
+int pa_alsa_fdlist_set_mixer(struct pa_alsa_fdlist *fdl, snd_mixer_t *mixer_handle, pa_mainloop_api* m) {
+ pa_assert(fdl);
+ pa_assert(mixer_handle);
+ pa_assert(m);
+ pa_assert(!fdl->m);
+
+ fdl->mixer = mixer_handle;
+ fdl->m = m;
+ fdl->defer = m->defer_new(m, defer_cb, fdl);
+
+ return 0;
+}
+
+static int set_format(snd_pcm_t *pcm_handle, snd_pcm_hw_params_t *hwparams, pa_sample_format_t *f) {
+
static const snd_pcm_format_t format_trans[] = {
[PA_SAMPLE_U8] = SND_PCM_FORMAT_U8,
[PA_SAMPLE_ALAW] = SND_PCM_FORMAT_A_LAW,
[PA_SAMPLE_FLOAT32LE] = SND_PCM_FORMAT_FLOAT_LE,
[PA_SAMPLE_FLOAT32BE] = SND_PCM_FORMAT_FLOAT_BE,
};
- assert(pcm_handle && ss && periods && period_size);
-
- if (snd_pcm_hw_params_malloc(&hwparams) < 0 ||
- snd_pcm_hw_params_any(pcm_handle, hwparams) < 0 ||
- snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED) < 0 ||
- snd_pcm_hw_params_set_format(pcm_handle, hwparams, format_trans[ss->format]) < 0 ||
- snd_pcm_hw_params_set_rate_near(pcm_handle, hwparams, &r, NULL) < 0 ||
- snd_pcm_hw_params_set_channels(pcm_handle, hwparams, ss->channels) < 0 ||
- (*periods > 0 && snd_pcm_hw_params_set_periods_near(pcm_handle, hwparams, periods, NULL) < 0) ||
- (*period_size > 0 && snd_pcm_hw_params_set_period_size_near(pcm_handle, hwparams, period_size, NULL) < 0) ||
- snd_pcm_hw_params(pcm_handle, hwparams) < 0)
+
+ static const pa_sample_format_t try_order[] = {
+ PA_SAMPLE_S16NE,
+ PA_SAMPLE_S16RE,
+ PA_SAMPLE_FLOAT32NE,
+ PA_SAMPLE_FLOAT32RE,
+ PA_SAMPLE_ULAW,
+ PA_SAMPLE_ALAW,
+ PA_SAMPLE_U8,
+ PA_SAMPLE_INVALID
+ };
+
+ int i, ret;
+
+ pa_assert(pcm_handle);
+ pa_assert(f);
+
+ if ((ret = snd_pcm_hw_params_set_format(pcm_handle, hwparams, format_trans[*f])) >= 0)
+ return ret;
+
+ if (*f == PA_SAMPLE_FLOAT32BE)
+ *f = PA_SAMPLE_FLOAT32LE;
+ else if (*f == PA_SAMPLE_FLOAT32LE)
+ *f = PA_SAMPLE_FLOAT32BE;
+ else if (*f == PA_SAMPLE_S16BE)
+ *f = PA_SAMPLE_S16LE;
+ else if (*f == PA_SAMPLE_S16LE)
+ *f = PA_SAMPLE_S16BE;
+ else
+ goto try_auto;
+
+ if ((ret = snd_pcm_hw_params_set_format(pcm_handle, hwparams, format_trans[*f])) >= 0)
+ return ret;
+
+try_auto:
+
+ for (i = 0; try_order[i] != PA_SAMPLE_INVALID; i++) {
+ *f = try_order[i];
+
+ if ((ret = snd_pcm_hw_params_set_format(pcm_handle, hwparams, format_trans[*f])) >= 0)
+ return ret;
+ }
+
+ return -1;
+}
+
+/* Set the hardware parameters of the given ALSA device. Returns the
+ * selected fragment settings in *period and *period_size */
+int pa_alsa_set_hw_params(snd_pcm_t *pcm_handle, pa_sample_spec *ss, uint32_t *periods, snd_pcm_uframes_t *period_size, int *use_mmap) {
+ int ret = -1;
+ snd_pcm_uframes_t buffer_size;
+ unsigned int r = ss->rate;
+ unsigned int c = ss->channels;
+ pa_sample_format_t f = ss->format;
+ snd_pcm_hw_params_t *hwparams;
+
+ pa_assert(pcm_handle);
+ pa_assert(ss);
+ pa_assert(periods);
+ pa_assert(period_size);
+
+ snd_pcm_hw_params_alloca(&hwparams);
+
+ buffer_size = *periods * *period_size;
+
+ if ((ret = snd_pcm_hw_params_any(pcm_handle, hwparams)) < 0 ||
+ (ret = snd_pcm_hw_params_set_rate_resample(pcm_handle, hwparams, 0)) < 0)
goto finish;
- if (ss->rate != r)
- pa_log_info(__FILE__": device doesn't support %u Hz, changed to %u Hz.\n", ss->rate, r);
-
- if (snd_pcm_prepare(pcm_handle) < 0)
+ if (use_mmap && *use_mmap) {
+ if ((ret = snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_MMAP_INTERLEAVED)) < 0) {
+
+ /* mmap() didn't work, fall back to interleaved */
+
+ if ((ret = snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0)
+ goto finish;
+
+ if (use_mmap)
+ *use_mmap = 0;
+ }
+
+ } else if ((ret = snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0)
+ goto finish;
+
+ if ((ret = set_format(pcm_handle, hwparams, &f)) < 0)
+ goto finish;
+
+ if ((ret = snd_pcm_hw_params_set_rate_near(pcm_handle, hwparams, &r, NULL)) < 0)
+ goto finish;
+
+ if ((ret = snd_pcm_hw_params_set_channels_near(pcm_handle, hwparams, &c)) < 0)
+ goto finish;
+
+ if ((*period_size > 0 && (ret = snd_pcm_hw_params_set_period_size_near(pcm_handle, hwparams, period_size, NULL)) < 0) ||
+ (*periods > 0 && (ret = snd_pcm_hw_params_set_buffer_size_near(pcm_handle, hwparams, &buffer_size)) < 0))
goto finish;
- if (snd_pcm_hw_params_get_buffer_size(hwparams, &buffer_size) < 0 ||
- snd_pcm_hw_params_get_period_size(hwparams, period_size, NULL) < 0)
+ if ((ret = snd_pcm_hw_params(pcm_handle, hwparams)) < 0)
goto finish;
-
- assert(buffer_size > 0);
- assert(*period_size > 0);
+
+ if (ss->rate != r) {
+ pa_log_warn("Device %s doesn't support %u Hz, changed to %u Hz.", snd_pcm_name(pcm_handle), ss->rate, r);
+
+ /* If the sample rate deviates too much, we need to resample */
+ if (r < ss->rate*.95 || r > ss->rate*1.05)
+ ss->rate = r;
+ }
+
+ if (ss->channels != c) {
+ pa_log_warn("Device %s doesn't support %u channels, changed to %u.", snd_pcm_name(pcm_handle), ss->channels, c);
+ ss->channels = c;
+ }
+
+ if (ss->format != f) {
+ pa_log_warn("Device %s doesn't support sample format %s, changed to %s.", snd_pcm_name(pcm_handle), pa_sample_format_to_string(ss->format), pa_sample_format_to_string(f));
+ ss->format = f;
+ }
+
+ if ((ret = snd_pcm_prepare(pcm_handle)) < 0)
+ goto finish;
+
+ if ((ret = snd_pcm_hw_params_get_buffer_size(hwparams, &buffer_size)) < 0 ||
+ (ret = snd_pcm_hw_params_get_period_size(hwparams, period_size, NULL)) < 0)
+ goto finish;
+
+ pa_assert(buffer_size > 0);
+ pa_assert(*period_size > 0);
*periods = buffer_size / *period_size;
- assert(*periods > 0);
-
+ pa_assert(*periods > 0);
+
ret = 0;
-
+
finish:
- if (hwparams)
- snd_pcm_hw_params_free(hwparams);
-
+
return ret;
}
-/* Allocate an IO event for every ALSA poll descriptor for the
- * specified ALSA device. Return a pointer to such an array in
- * *io_events. Store the length of that array in *n_io_events. Use the
- * specified callback function and userdata. The array has to be freed
- * with pa_free_io_events(). */
-int pa_create_io_events(snd_pcm_t *pcm_handle, pa_mainloop_api* m, pa_io_event ***io_events, unsigned *n_io_events, void (*cb)(pa_mainloop_api*a, pa_io_event *e, int fd, pa_io_event_flags_t events, void *userdata), void *userdata) {
- unsigned i;
- struct pollfd *pfds, *ppfd;
- pa_io_event **ios;
- assert(pcm_handle && m && io_events && n_io_events && cb);
+int pa_alsa_set_sw_params(snd_pcm_t *pcm) {
+ snd_pcm_sw_params_t *swparams;
+ int err;
+
+ pa_assert(pcm);
+
+ snd_pcm_sw_params_alloca(&swparams);
+
+ if ((err = snd_pcm_sw_params_current(pcm, swparams) < 0)) {
+ pa_log_warn("Unable to determine current swparams: %s\n", snd_strerror(err));
+ return err;
+ }
+
+ if ((err = snd_pcm_sw_params_set_stop_threshold(pcm, swparams, (snd_pcm_uframes_t) -1)) < 0) {
+ pa_log_warn("Unable to set stop threshold: %s\n", snd_strerror(err));
+ return err;
+ }
+
+ if ((err = snd_pcm_sw_params_set_start_threshold(pcm, swparams, (snd_pcm_uframes_t) -1)) < 0) {
+ pa_log_warn("Unable to set start threshold: %s\n", snd_strerror(err));
+ return err;
+ }
+
+ if ((err = snd_pcm_sw_params(pcm, swparams)) < 0) {
+ pa_log_warn("Unable to set sw params: %s\n", snd_strerror(err));
+ return err;
+ }
- *n_io_events = snd_pcm_poll_descriptors_count(pcm_handle);
+ return 0;
+}
+
+int pa_alsa_prepare_mixer(snd_mixer_t *mixer, const char *dev) {
+ int err;
- pfds = pa_xmalloc(sizeof(struct pollfd) * *n_io_events);
- if (snd_pcm_poll_descriptors(pcm_handle, pfds, *n_io_events) < 0) {
- pa_xfree(pfds);
+ pa_assert(mixer);
+ pa_assert(dev);
+
+ if ((err = snd_mixer_attach(mixer, dev)) < 0) {
+ pa_log_warn("Unable to attach to mixer %s: %s", dev, snd_strerror(err));
return -1;
}
-
- *io_events = pa_xmalloc(sizeof(void*) * *n_io_events);
- for (i = 0, ios = *io_events, ppfd = pfds; i < *n_io_events; i++, ios++, ppfd++) {
- *ios = m->io_new(m, ppfd->fd,
- ((ppfd->events & POLLIN) ? PA_IO_EVENT_INPUT : 0) |
- ((ppfd->events & POLLOUT) ? PA_IO_EVENT_OUTPUT : 0), cb, userdata);
- assert(*ios);
+ if ((err = snd_mixer_selem_register(mixer, NULL, NULL)) < 0) {
+ pa_log_warn("Unable to register mixer: %s", snd_strerror(err));
+ return -1;
+ }
+
+ if ((err = snd_mixer_load(mixer)) < 0) {
+ pa_log_warn("Unable to load mixer: %s", snd_strerror(err));
+ return -1;
}
- pa_xfree(pfds);
return 0;
}
-/* Free the memory allocated by pa_create_io_events() */
-void pa_free_io_events(pa_mainloop_api* m, pa_io_event **io_events, unsigned n_io_events) {
- unsigned i;
- pa_io_event **ios;
- assert(m && io_events);
-
- for (ios = io_events, i = 0; i < n_io_events; i++, ios++)
- m->io_free(*ios);
- pa_xfree(io_events);
+snd_mixer_elem_t *pa_alsa_find_elem(snd_mixer_t *mixer, const char *name, const char *fallback) {
+ snd_mixer_elem_t *elem;
+ snd_mixer_selem_id_t *sid = NULL;
+
+ snd_mixer_selem_id_alloca(&sid);
+
+ pa_assert(mixer);
+ pa_assert(name);
+
+ snd_mixer_selem_id_set_name(sid, name);
+
+ if (!(elem = snd_mixer_find_selem(mixer, sid))) {
+ pa_log_warn("Cannot find mixer control \"%s\".", snd_mixer_selem_id_get_name(sid));
+
+ if (fallback) {
+ snd_mixer_selem_id_set_name(sid, fallback);
+
+ if (!(elem = snd_mixer_find_selem(mixer, sid)))
+ pa_log_warn("Cannot find fallback mixer control \"%s\".", snd_mixer_selem_id_get_name(sid));
+ }
+ }
+
+ if (elem)
+ pa_log_info("Using mixer control \"%s\".", snd_mixer_selem_id_get_name(sid));
+
+ return elem;
}