From c7fff97782bb59815e7ebd38895cc1480719e24c Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Thu, 15 Jan 2009 21:02:01 +0100 Subject: move alsa and oss modules into their own subdirectories --- src/modules/alsa-util.c | 1261 ----------------------------------------------- 1 file changed, 1261 deletions(-) delete mode 100644 src/modules/alsa-util.c (limited to 'src/modules/alsa-util.c') diff --git a/src/modules/alsa-util.c b/src/modules/alsa-util.c deleted file mode 100644 index ff3af19d..00000000 --- a/src/modules/alsa-util.c +++ /dev/null @@ -1,1261 +0,0 @@ -/*** - This file is part of PulseAudio. - - Copyright 2004-2006 Lennart Poettering - Copyright 2006 Pierre Ossman 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 -#endif - -#include -#include -#include - -#include -#include -#include - -#include -#include -#include -#include - -#include "alsa-util.h" - -struct pa_alsa_fdlist { - unsigned 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; - - pa_bool_t polled; - - void (*cb)(void *userdata); - void *userdata; -}; - -static void io_cb(pa_mainloop_api*a, pa_io_event* e, int fd, pa_io_event_flags_t events, void *userdata) { - - struct pa_alsa_fdlist *fdl = userdata; - int err; - unsigned 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 = TRUE; - - 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_defer_event* e, void *userdata) { - struct pa_alsa_fdlist *fdl = userdata; - unsigned num_fds, i; - int err; - struct pollfd *temp; - - pa_assert(a); - pa_assert(fdl); - pa_assert(fdl->mixer); - - a->defer_enable(fdl->defer, 0); - - num_fds = (unsigned) snd_mixer_poll_descriptors_count(fdl->mixer); - - 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 = FALSE; - - 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 = FALSE; - - 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) { - unsigned 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_ULAW] = SND_PCM_FORMAT_MU_LAW, - [PA_SAMPLE_S16LE] = SND_PCM_FORMAT_S16_LE, - [PA_SAMPLE_S16BE] = SND_PCM_FORMAT_S16_BE, - [PA_SAMPLE_FLOAT32LE] = SND_PCM_FORMAT_FLOAT_LE, - [PA_SAMPLE_FLOAT32BE] = SND_PCM_FORMAT_FLOAT_BE, - [PA_SAMPLE_S32LE] = SND_PCM_FORMAT_S32_LE, - [PA_SAMPLE_S32BE] = SND_PCM_FORMAT_S32_BE, - }; - - static const pa_sample_format_t try_order[] = { - PA_SAMPLE_FLOAT32NE, - PA_SAMPLE_FLOAT32RE, - PA_SAMPLE_S32NE, - PA_SAMPLE_S32RE, - PA_SAMPLE_S16NE, - PA_SAMPLE_S16RE, - PA_SAMPLE_ALAW, - PA_SAMPLE_ULAW, - 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 if (*f == PA_SAMPLE_S32BE) - *f = PA_SAMPLE_S32LE; - else if (*f == PA_SAMPLE_S32LE) - *f = PA_SAMPLE_S32BE; - 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, - snd_pcm_uframes_t tsched_size, - pa_bool_t *use_mmap, - pa_bool_t *use_tsched, - pa_bool_t require_exact_channel_number) { - - int ret = -1; - snd_pcm_uframes_t _period_size = *period_size; - unsigned int _periods = *periods; - 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_bool_t _use_mmap = use_mmap && *use_mmap; - pa_bool_t _use_tsched = use_tsched && *use_tsched; - int dir; - - pa_assert(pcm_handle); - pa_assert(ss); - pa_assert(periods); - pa_assert(period_size); - - snd_pcm_hw_params_alloca(&hwparams); - - if ((ret = snd_pcm_hw_params_any(pcm_handle, hwparams)) < 0) - goto finish; - - if ((ret = snd_pcm_hw_params_set_rate_resample(pcm_handle, hwparams, 0)) < 0) - goto finish; - - if (_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; - - _use_mmap = FALSE; - } - - } else if ((ret = snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) - goto finish; - - if (!_use_mmap) - _use_tsched = FALSE; - - 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; - - /* Adjust the buffer sizes, if we didn't get the rate we were asking for */ - _period_size = (snd_pcm_uframes_t) (((uint64_t) _period_size * r) / ss->rate); - tsched_size = (snd_pcm_uframes_t) (((uint64_t) tsched_size * r) / ss->rate); - - if (require_exact_channel_number) { - if ((ret = snd_pcm_hw_params_set_channels(pcm_handle, hwparams, c)) < 0) - goto finish; - } else { - if ((ret = snd_pcm_hw_params_set_channels_near(pcm_handle, hwparams, &c)) < 0) - goto finish; - } - - if (_use_tsched) { - _period_size = tsched_size; - _periods = 1; - - pa_assert_se(snd_pcm_hw_params_get_buffer_size_max(hwparams, &buffer_size) == 0); - pa_log_debug("Maximum hw buffer size is %u ms", (unsigned) buffer_size * 1000 / r); - } - - buffer_size = _periods * _period_size; - - if ((ret = snd_pcm_hw_params_set_periods_integer(pcm_handle, hwparams)) < 0) - goto finish; - - if (_periods > 0) { - - /* First we pass 0 as direction to get exactly what we asked - * for. That this is necessary is presumably a bug in ALSA */ - - dir = 0; - if ((ret = snd_pcm_hw_params_set_periods_near(pcm_handle, hwparams, &_periods, &dir)) < 0) { - dir = 1; - if ((ret = snd_pcm_hw_params_set_periods_near(pcm_handle, hwparams, &_periods, &dir)) < 0) { - dir = -1; - if ((ret = snd_pcm_hw_params_set_periods_near(pcm_handle, hwparams, &_periods, &dir)) < 0) - goto finish; - } - } - } - - if (_period_size > 0) - if ((ret = snd_pcm_hw_params_set_buffer_size_near(pcm_handle, hwparams, &buffer_size)) < 0) - goto finish; - - if ((ret = snd_pcm_hw_params(pcm_handle, hwparams)) < 0) - goto finish; - - 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 (ss->channels != c) - pa_log_warn("Device %s doesn't support %u channels, changed to %u.", snd_pcm_name(pcm_handle), 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)); - - if ((ret = snd_pcm_prepare(pcm_handle)) < 0) - goto finish; - - if ((ret = snd_pcm_hw_params_get_period_size(hwparams, &_period_size, &dir)) < 0 || - (ret = snd_pcm_hw_params_get_periods(hwparams, &_periods, &dir)) < 0) - goto finish; - - /* If the sample rate deviates too much, we need to resample */ - if (r < ss->rate*.95 || r > ss->rate*1.05) - ss->rate = r; - ss->channels = (uint8_t) c; - ss->format = f; - - pa_assert(_periods > 0); - pa_assert(_period_size > 0); - - *periods = _periods; - *period_size = _period_size; - - if (use_mmap) - *use_mmap = _use_mmap; - - if (use_tsched) - *use_tsched = _use_tsched; - - ret = 0; - - snd_pcm_nonblock(pcm_handle, 1); - -finish: - - return ret; -} - -int pa_alsa_set_sw_params(snd_pcm_t *pcm, snd_pcm_uframes_t avail_min) { - 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_set_avail_min(pcm, swparams, avail_min)) < 0) { - pa_log_error("snd_pcm_sw_params_set_avail_min() failed: %s", 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; - } - - return 0; -} - -struct device_info { - pa_channel_map map; - const char *name; -}; - -static const struct device_info device_table[] = { - {{ 2, { PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT } }, "front" }, - - {{ 4, { PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT, - PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT }}, "surround40" }, - - {{ 5, { PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT, - PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT, - PA_CHANNEL_POSITION_LFE }}, "surround41" }, - - {{ 5, { PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT, - PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT, - PA_CHANNEL_POSITION_CENTER }}, "surround50" }, - - {{ 6, { PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT, - PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT, - PA_CHANNEL_POSITION_CENTER, PA_CHANNEL_POSITION_LFE }}, "surround51" }, - - {{ 8, { PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT, - PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT, - PA_CHANNEL_POSITION_CENTER, PA_CHANNEL_POSITION_LFE, - PA_CHANNEL_POSITION_SIDE_LEFT, PA_CHANNEL_POSITION_SIDE_RIGHT }} , "surround71" }, - - {{ 0, { 0 }}, NULL } -}; - -static pa_bool_t channel_map_superset(const pa_channel_map *a, const pa_channel_map *b) { - pa_bool_t in_a[PA_CHANNEL_POSITION_MAX]; - unsigned i; - - pa_assert(a); - pa_assert(b); - - memset(in_a, 0, sizeof(in_a)); - - for (i = 0; i < a->channels; i++) - in_a[a->map[i]] = TRUE; - - for (i = 0; i < b->channels; i++) - if (!in_a[b->map[i]]) - return FALSE; - - return TRUE; -} - -snd_pcm_t *pa_alsa_open_by_device_id( - const char *dev_id, - char **dev, - pa_sample_spec *ss, - pa_channel_map* map, - int mode, - uint32_t *nfrags, - snd_pcm_uframes_t *period_size, - snd_pcm_uframes_t tsched_size, - pa_bool_t *use_mmap, - pa_bool_t *use_tsched) { - - int i; - int direction = 1; - int err; - char *d; - snd_pcm_t *pcm_handle; - - pa_assert(dev_id); - pa_assert(dev); - pa_assert(ss); - pa_assert(map); - pa_assert(nfrags); - pa_assert(period_size); - - /* First we try to find a device string with a superset of the - * requested channel map and open it without the plug: prefix. We - * iterate through our device table from top to bottom and take - * the first that matches. If we didn't find a working device that - * way, we iterate backwards, and check all devices that do not - * provide a superset of the requested channel map.*/ - - for (i = 0;; i += direction) { - pa_sample_spec try_ss; - pa_bool_t reformat; - - if (i < 0) { - pa_assert(direction == -1); - - /* OK, so we iterated backwards, and now are at the - * beginning of our list. */ - - break; - - } else if (!device_table[i].name) { - pa_assert(direction == 1); - - /* OK, so we are at the end of our list. at iterated - * forwards. */ - - i--; - direction = -1; - } - - if ((direction > 0) == !channel_map_superset(&device_table[i].map, map)) - continue; - - d = pa_sprintf_malloc("%s:%s", device_table[i].name, dev_id); - - reformat = FALSE; - for (;;) { - pa_log_debug("Trying %s %s SND_PCM_NO_AUTO_FORMAT ...", d, reformat ? "without" : "with"); - - /* We don't pass SND_PCM_NONBLOCK here, since alsa-lib <= - * 1.0.17a would then ignore the SND_PCM_NO_xxx - * flags. Instead we enable nonblock mode afterwards via - * snd_pcm_nonblock(). Also see - * http://mailman.alsa-project.org/pipermail/alsa-devel/2008-August/010258.html */ - - if ((err = snd_pcm_open(&pcm_handle, d, mode, - /* SND_PCM_NONBLOCK| */ - SND_PCM_NO_AUTO_RESAMPLE| - SND_PCM_NO_AUTO_CHANNELS| - (reformat ? 0 : SND_PCM_NO_AUTO_FORMAT))) < 0) { - pa_log_info("Couldn't open PCM device %s: %s", d, snd_strerror(err)); - break; - } - - try_ss.channels = device_table[i].map.channels; - try_ss.rate = ss->rate; - try_ss.format = ss->format; - - if ((err = pa_alsa_set_hw_params(pcm_handle, &try_ss, nfrags, period_size, tsched_size, use_mmap, use_tsched, TRUE)) < 0) { - - if (!reformat) { - reformat = TRUE; - snd_pcm_close(pcm_handle); - continue; - } - - if (!pa_startswith(d, "plug:") && !pa_startswith(d, "plughw:")) { - char *t; - - t = pa_sprintf_malloc("plug:%s", d); - pa_xfree(d); - d = t; - - reformat = FALSE; - - snd_pcm_close(pcm_handle); - continue; - } - - pa_log_info("PCM device %s refused our hw parameters: %s", d, snd_strerror(err)); - snd_pcm_close(pcm_handle); - break; - } - - *ss = try_ss; - *map = device_table[i].map; - pa_assert(map->channels == ss->channels); - *dev = d; - return pcm_handle; - } - - pa_xfree(d); - } - - /* OK, we didn't find any good device, so let's try the raw plughw: stuff */ - - d = pa_sprintf_malloc("hw:%s", dev_id); - pa_log_debug("Trying %s as last resort...", d); - pcm_handle = pa_alsa_open_by_device_string(d, dev, ss, map, mode, nfrags, period_size, tsched_size, use_mmap, use_tsched); - pa_xfree(d); - - return pcm_handle; -} - -snd_pcm_t *pa_alsa_open_by_device_string( - const char *device, - char **dev, - pa_sample_spec *ss, - pa_channel_map* map, - int mode, - uint32_t *nfrags, - snd_pcm_uframes_t *period_size, - snd_pcm_uframes_t tsched_size, - pa_bool_t *use_mmap, - pa_bool_t *use_tsched) { - - int err; - char *d; - snd_pcm_t *pcm_handle; - pa_bool_t reformat = FALSE; - - pa_assert(device); - pa_assert(dev); - pa_assert(ss); - pa_assert(map); - pa_assert(nfrags); - pa_assert(period_size); - - d = pa_xstrdup(device); - - for (;;) { - pa_log_debug("Trying %s %s SND_PCM_NO_AUTO_FORMAT ...", d, reformat ? "without" : "with"); - - /* We don't pass SND_PCM_NONBLOCK here, since alsa-lib <= - * 1.0.17a would then ignore the SND_PCM_NO_xxx flags. Instead - * we enable nonblock mode afterwards via - * snd_pcm_nonblock(). Also see - * http://mailman.alsa-project.org/pipermail/alsa-devel/2008-August/010258.html */ - - if ((err = snd_pcm_open(&pcm_handle, d, mode, - /*SND_PCM_NONBLOCK|*/ - SND_PCM_NO_AUTO_RESAMPLE| - SND_PCM_NO_AUTO_CHANNELS| - (reformat ? 0 : SND_PCM_NO_AUTO_FORMAT))) < 0) { - pa_log("Error opening PCM device %s: %s", d, snd_strerror(err)); - pa_xfree(d); - return NULL; - } - - if ((err = pa_alsa_set_hw_params(pcm_handle, ss, nfrags, period_size, tsched_size, use_mmap, use_tsched, FALSE)) < 0) { - - if (!reformat) { - reformat = TRUE; - - snd_pcm_close(pcm_handle); - continue; - } - - /* Hmm, some hw is very exotic, so we retry with plug, if without it didn't work */ - - if (!pa_startswith(d, "plug:") && !pa_startswith(d, "plughw:")) { - char *t; - - t = pa_sprintf_malloc("plug:%s", d); - pa_xfree(d); - d = t; - - reformat = FALSE; - - snd_pcm_close(pcm_handle); - continue; - } - - pa_log("Failed to set hardware parameters on %s: %s", d, snd_strerror(err)); - pa_xfree(d); - snd_pcm_close(pcm_handle); - return NULL; - } - - *dev = d; - - if (ss->channels != map->channels) - pa_channel_map_init_extend(map, ss->channels, PA_CHANNEL_MAP_ALSA); - - return pcm_handle; - } -} - -int pa_alsa_prepare_mixer(snd_mixer_t *mixer, const char *dev) { - int err; - - pa_assert(mixer); - pa_assert(dev); - - if ((err = snd_mixer_attach(mixer, dev)) < 0) { - pa_log_info("Unable to attach to mixer %s: %s", dev, snd_strerror(err)); - return -1; - } - - 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_log_info("Successfully attached to mixer '%s'", dev); - - return 0; -} - -static pa_bool_t elem_has_volume(snd_mixer_elem_t *elem, pa_bool_t playback) { - pa_assert(elem); - - if (playback && snd_mixer_selem_has_playback_volume(elem)) - return TRUE; - - if (!playback && snd_mixer_selem_has_capture_volume(elem)) - return TRUE; - - return FALSE; -} - -static pa_bool_t elem_has_switch(snd_mixer_elem_t *elem, pa_bool_t playback) { - pa_assert(elem); - - if (playback && snd_mixer_selem_has_playback_switch(elem)) - return TRUE; - - if (!playback && snd_mixer_selem_has_capture_switch(elem)) - return TRUE; - - return FALSE; -} - -snd_mixer_elem_t *pa_alsa_find_elem(snd_mixer_t *mixer, const char *name, const char *fallback, pa_bool_t playback) { - snd_mixer_elem_t *elem = NULL, *fallback_elem = NULL; - 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))) { - - if (elem_has_volume(elem, playback) && - elem_has_switch(elem, playback)) - goto success; - - if (!elem_has_volume(elem, playback) && - !elem_has_switch(elem, playback)) - elem = NULL; - } - - pa_log_info("Cannot find mixer control \"%s\" or mixer control is no combination of switch/volume.", snd_mixer_selem_id_get_name(sid)); - - if (fallback) { - snd_mixer_selem_id_set_name(sid, fallback); - - if ((fallback_elem = snd_mixer_find_selem(mixer, sid))) { - - if (elem_has_volume(fallback_elem, playback) && - elem_has_switch(fallback_elem, playback)) { - elem = fallback_elem; - goto success; - } - - if (!elem_has_volume(fallback_elem, playback) && - !elem_has_switch(fallback_elem, playback)) - fallback_elem = NULL; - } - - pa_log_warn("Cannot find fallback mixer control \"%s\" or mixer control is no combination of switch/volume.", snd_mixer_selem_id_get_name(sid)); - } - - if (elem && fallback_elem) { - - /* Hmm, so we have both elements, but neither has both mute - * and volume. Let's prefer the one with the volume */ - - if (elem_has_volume(elem, playback)) - goto success; - - if (elem_has_volume(fallback_elem, playback)) { - elem = fallback_elem; - goto success; - } - } - - if (!elem && fallback_elem) - elem = fallback_elem; - -success: - - if (elem) - pa_log_info("Using mixer control \"%s\".", snd_mixer_selem_id_get_name(sid)); - - return elem; -} - -static const snd_mixer_selem_channel_id_t alsa_channel_ids[PA_CHANNEL_POSITION_MAX] = { - [PA_CHANNEL_POSITION_MONO] = SND_MIXER_SCHN_MONO, /* The ALSA name is just an alias! */ - - [PA_CHANNEL_POSITION_FRONT_CENTER] = SND_MIXER_SCHN_FRONT_CENTER, - [PA_CHANNEL_POSITION_FRONT_LEFT] = SND_MIXER_SCHN_FRONT_LEFT, - [PA_CHANNEL_POSITION_FRONT_RIGHT] = SND_MIXER_SCHN_FRONT_RIGHT, - - [PA_CHANNEL_POSITION_REAR_CENTER] = SND_MIXER_SCHN_REAR_CENTER, - [PA_CHANNEL_POSITION_REAR_LEFT] = SND_MIXER_SCHN_REAR_LEFT, - [PA_CHANNEL_POSITION_REAR_RIGHT] = SND_MIXER_SCHN_REAR_RIGHT, - - [PA_CHANNEL_POSITION_LFE] = SND_MIXER_SCHN_WOOFER, - - [PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER] = SND_MIXER_SCHN_UNKNOWN, - - [PA_CHANNEL_POSITION_SIDE_LEFT] = SND_MIXER_SCHN_SIDE_LEFT, - [PA_CHANNEL_POSITION_SIDE_RIGHT] = SND_MIXER_SCHN_SIDE_RIGHT, - - [PA_CHANNEL_POSITION_AUX0] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX1] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX2] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX3] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX4] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX5] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX6] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX7] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX8] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX9] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX10] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX11] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX12] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX13] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX14] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX15] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX16] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX17] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX18] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX19] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX20] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX21] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX22] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX23] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX24] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX25] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX26] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX27] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX28] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX29] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX30] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_AUX31] = SND_MIXER_SCHN_UNKNOWN, - - [PA_CHANNEL_POSITION_TOP_CENTER] = SND_MIXER_SCHN_UNKNOWN, - - [PA_CHANNEL_POSITION_TOP_FRONT_CENTER] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_TOP_FRONT_LEFT] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_TOP_FRONT_RIGHT] = SND_MIXER_SCHN_UNKNOWN, - - [PA_CHANNEL_POSITION_TOP_REAR_CENTER] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_TOP_REAR_LEFT] = SND_MIXER_SCHN_UNKNOWN, - [PA_CHANNEL_POSITION_TOP_REAR_RIGHT] = SND_MIXER_SCHN_UNKNOWN -}; - - -int pa_alsa_calc_mixer_map(snd_mixer_elem_t *elem, const pa_channel_map *channel_map, snd_mixer_selem_channel_id_t mixer_map[], pa_bool_t playback) { - unsigned i; - pa_bool_t alsa_channel_used[SND_MIXER_SCHN_LAST]; - pa_bool_t mono_used = FALSE; - - pa_assert(elem); - pa_assert(channel_map); - pa_assert(mixer_map); - - memset(&alsa_channel_used, 0, sizeof(alsa_channel_used)); - - if (channel_map->channels > 1 && - ((playback && snd_mixer_selem_has_playback_volume_joined(elem)) || - (!playback && snd_mixer_selem_has_capture_volume_joined(elem)))) { - pa_log_info("ALSA device lacks independant volume controls for each channel."); - return -1; - } - - for (i = 0; i < channel_map->channels; i++) { - snd_mixer_selem_channel_id_t id; - pa_bool_t is_mono; - - is_mono = channel_map->map[i] == PA_CHANNEL_POSITION_MONO; - id = alsa_channel_ids[channel_map->map[i]]; - - if (!is_mono && id == SND_MIXER_SCHN_UNKNOWN) { - pa_log_info("Configured channel map contains channel '%s' that is unknown to the ALSA mixer.", pa_channel_position_to_string(channel_map->map[i])); - return -1; - } - - if ((is_mono && mono_used) || (!is_mono && alsa_channel_used[id])) { - pa_log_info("Channel map has duplicate channel '%s', falling back to software volume control.", pa_channel_position_to_string(channel_map->map[i])); - return -1; - } - - if ((playback && (!snd_mixer_selem_has_playback_channel(elem, id) || (is_mono && !snd_mixer_selem_is_playback_mono(elem)))) || - (!playback && (!snd_mixer_selem_has_capture_channel(elem, id) || (is_mono && !snd_mixer_selem_is_capture_mono(elem))))) { - - pa_log_info("ALSA device lacks separate volumes control for channel '%s'", pa_channel_position_to_string(channel_map->map[i])); - return -1; - } - - if (is_mono) { - mixer_map[i] = SND_MIXER_SCHN_MONO; - mono_used = TRUE; - } else { - mixer_map[i] = id; - alsa_channel_used[id] = TRUE; - } - } - - pa_log_info("All %u channels can be mapped to mixer channels.", channel_map->channels); - - return 0; -} - -void pa_alsa_dump(snd_pcm_t *pcm) { - int err; - snd_output_t *out; - - pa_assert(pcm); - - pa_assert_se(snd_output_buffer_open(&out) == 0); - - if ((err = snd_pcm_dump(pcm, out)) < 0) - pa_log_debug("snd_pcm_dump(): %s", snd_strerror(err)); - else { - char *s = NULL; - snd_output_buffer_string(out, &s); - pa_log_debug("snd_pcm_dump():\n%s", pa_strnull(s)); - } - - pa_assert_se(snd_output_close(out) == 0); -} - -void pa_alsa_dump_status(snd_pcm_t *pcm) { - int err; - snd_output_t *out; - snd_pcm_status_t *status; - - pa_assert(pcm); - - snd_pcm_status_alloca(&status); - - pa_assert_se(snd_output_buffer_open(&out) == 0); - - pa_assert_se(snd_pcm_status(pcm, status) == 0); - - if ((err = snd_pcm_status_dump(status, out)) < 0) - pa_log_debug("snd_pcm_dump(): %s", snd_strerror(err)); - else { - char *s = NULL; - snd_output_buffer_string(out, &s); - pa_log_debug("snd_pcm_dump():\n%s", pa_strnull(s)); - } - - pa_assert_se(snd_output_close(out) == 0); -} - -static void alsa_error_handler(const char *file, int line, const char *function, int err, const char *fmt,...) { - va_list ap; - char *alsa_file; - - alsa_file = pa_sprintf_malloc("(alsa-lib)%s", file); - - va_start(ap, fmt); - - pa_log_levelv_meta(PA_LOG_INFO, alsa_file, line, function, fmt, ap); - - va_end(ap); - - pa_xfree(alsa_file); -} - -static pa_atomic_t n_error_handler_installed = PA_ATOMIC_INIT(0); - -void pa_alsa_redirect_errors_inc(void) { - /* This is not really thread safe, but we do our best */ - - if (pa_atomic_inc(&n_error_handler_installed) == 0) - snd_lib_error_set_handler(alsa_error_handler); -} - -void pa_alsa_redirect_errors_dec(void) { - int r; - - pa_assert_se((r = pa_atomic_dec(&n_error_handler_installed)) >= 1); - - if (r == 1) - snd_lib_error_set_handler(NULL); -} - -void pa_alsa_init_proplist(pa_proplist *p, snd_pcm_info_t *pcm_info) { - - static const char * const alsa_class_table[SND_PCM_CLASS_LAST+1] = { - [SND_PCM_CLASS_GENERIC] = "generic", - [SND_PCM_CLASS_MULTI] = "multi", - [SND_PCM_CLASS_MODEM] = "modem", - [SND_PCM_CLASS_DIGITIZER] = "digitizer" - }; - static const char * const class_table[SND_PCM_CLASS_LAST+1] = { - [SND_PCM_CLASS_GENERIC] = "sound", - [SND_PCM_CLASS_MULTI] = NULL, - [SND_PCM_CLASS_MODEM] = "modem", - [SND_PCM_CLASS_DIGITIZER] = NULL - }; - static const char * const alsa_subclass_table[SND_PCM_SUBCLASS_LAST+1] = { - [SND_PCM_SUBCLASS_GENERIC_MIX] = "generic-mix", - [SND_PCM_SUBCLASS_MULTI_MIX] = "multi-mix" - }; - - snd_pcm_class_t class; - snd_pcm_subclass_t subclass; - const char *n, *id, *sdn; - char *cn = NULL, *lcn = NULL; - int card; - - pa_assert(p); - pa_assert(pcm_info); - - pa_proplist_sets(p, PA_PROP_DEVICE_API, "alsa"); - - class = snd_pcm_info_get_class(pcm_info); - if (class <= SND_PCM_CLASS_LAST) { - if (class_table[class]) - pa_proplist_sets(p, PA_PROP_DEVICE_CLASS, class_table[class]); - if (alsa_class_table[class]) - pa_proplist_sets(p, "alsa.class", alsa_class_table[class]); - } - subclass = snd_pcm_info_get_subclass(pcm_info); - if (subclass <= SND_PCM_SUBCLASS_LAST) - if (alsa_subclass_table[subclass]) - pa_proplist_sets(p, "alsa.subclass", alsa_subclass_table[subclass]); - - if ((n = snd_pcm_info_get_name(pcm_info))) - pa_proplist_sets(p, "alsa.name", n); - - if ((id = snd_pcm_info_get_id(pcm_info))) - pa_proplist_sets(p, "alsa.id", id); - - pa_proplist_setf(p, "alsa.subdevice", "%u", snd_pcm_info_get_subdevice(pcm_info)); - if ((sdn = snd_pcm_info_get_subdevice_name(pcm_info))) - pa_proplist_sets(p, "alsa.subdevice_name", sdn); - - pa_proplist_setf(p, "alsa.device", "%u", snd_pcm_info_get_device(pcm_info)); - - if ((card = snd_pcm_info_get_card(pcm_info)) >= 0) { - pa_proplist_setf(p, "alsa.card", "%i", card); - - if (snd_card_get_name(card, &cn) >= 0) - pa_proplist_sets(p, "alsa.card_name", cn); - - if (snd_card_get_longname(card, &lcn) >= 0) - pa_proplist_sets(p, "alsa.long_card_name", lcn); - } - - if (cn && n) - pa_proplist_setf(p, PA_PROP_DEVICE_DESCRIPTION, "%s - %s", cn, n); - else if (cn) - pa_proplist_sets(p, PA_PROP_DEVICE_DESCRIPTION, cn); - else if (n) - pa_proplist_sets(p, PA_PROP_DEVICE_DESCRIPTION, n); - - free(lcn); - free(cn); -} - -int pa_alsa_recover_from_poll(snd_pcm_t *pcm, int revents) { - snd_pcm_state_t state; - int err; - - pa_assert(pcm); - - if (revents & POLLERR) - pa_log_debug("Got POLLERR from ALSA"); - if (revents & POLLNVAL) - pa_log_warn("Got POLLNVAL from ALSA"); - if (revents & POLLHUP) - pa_log_warn("Got POLLHUP from ALSA"); - if (revents & POLLPRI) - pa_log_warn("Got POLLPRI from ALSA"); - if (revents & POLLIN) - pa_log_debug("Got POLLIN from ALSA"); - if (revents & POLLOUT) - pa_log_debug("Got POLLOUT from ALSA"); - - state = snd_pcm_state(pcm); - pa_log_debug("PCM state is %s", snd_pcm_state_name(state)); - - /* Try to recover from this error */ - - switch (state) { - - case SND_PCM_STATE_XRUN: - if ((err = snd_pcm_recover(pcm, -EPIPE, 1)) != 0) { - pa_log_warn("Could not recover from POLLERR|POLLNVAL|POLLHUP and XRUN: %s", snd_strerror(err)); - return -1; - } - break; - - case SND_PCM_STATE_SUSPENDED: - if ((err = snd_pcm_recover(pcm, -ESTRPIPE, 1)) != 0) { - pa_log_warn("Could not recover from POLLERR|POLLNVAL|POLLHUP and SUSPENDED: %s", snd_strerror(err)); - return -1; - } - break; - - default: - - snd_pcm_drop(pcm); - - if ((err = snd_pcm_prepare(pcm)) < 0) { - pa_log_warn("Could not recover from POLLERR|POLLNVAL|POLLHUP with snd_pcm_prepare(): %s", snd_strerror(err)); - return -1; - } - break; - } - - return 0; -} - -pa_rtpoll_item* pa_alsa_build_pollfd(snd_pcm_t *pcm, pa_rtpoll *rtpoll) { - int n, err; - struct pollfd *pollfd; - pa_rtpoll_item *item; - - pa_assert(pcm); - - if ((n = snd_pcm_poll_descriptors_count(pcm)) < 0) { - pa_log("snd_pcm_poll_descriptors_count() failed: %s", snd_strerror(n)); - return NULL; - } - - item = pa_rtpoll_item_new(rtpoll, PA_RTPOLL_NEVER, (unsigned) n); - pollfd = pa_rtpoll_item_get_pollfd(item, NULL); - - if ((err = snd_pcm_poll_descriptors(pcm, pollfd, (unsigned) n)) < 0) { - pa_log("snd_pcm_poll_descriptors() failed: %s", snd_strerror(err)); - pa_rtpoll_item_free(item); - return NULL; - } - - return item; -} - -snd_pcm_sframes_t pa_alsa_safe_avail_update(snd_pcm_t *pcm, size_t hwbuf_size, const pa_sample_spec *ss) { - snd_pcm_sframes_t n; - size_t k; - - pa_assert(pcm); - pa_assert(hwbuf_size > 0); - pa_assert(ss); - - /* Some ALSA driver expose weird bugs, let's inform the user about - * what is going on */ - - n = snd_pcm_avail_update(pcm); - - if (n <= 0) - return n; - - k = (size_t) n * pa_frame_size(ss); - - if (k >= hwbuf_size * 3 || - k >= pa_bytes_per_second(ss)*10) - pa_log("snd_pcm_avail_update() returned a value that is exceptionally large: %lu bytes (%lu ms) " - "Most likely this is an ALSA driver bug. Please report this issue to the PulseAudio developers.", - (unsigned long) k, (unsigned long) (pa_bytes_to_usec(k, ss) / PA_USEC_PER_MSEC)); - - return n; -} - -int pa_alsa_safe_mmap_begin(snd_pcm_t *pcm, const snd_pcm_channel_area_t **areas, snd_pcm_uframes_t *offset, snd_pcm_uframes_t *frames, size_t hwbuf_size, const pa_sample_spec *ss) { - int r; - snd_pcm_uframes_t before; - size_t k; - - pa_assert(pcm); - pa_assert(areas); - pa_assert(offset); - pa_assert(frames); - pa_assert(hwbuf_size > 0); - pa_assert(ss); - - before = *frames; - - r = snd_pcm_mmap_begin(pcm, areas, offset, frames); - - if (r < 0) - return r; - - k = (size_t) *frames * pa_frame_size(ss); - - if (*frames > before || - k >= hwbuf_size * 3 || - k >= pa_bytes_per_second(ss)*10) - - pa_log("snd_pcm_mmap_begin() returned a value that is exceptionally large: %lu bytes (%lu ms) " - "Most likely this is an ALSA driver bug. Please report this issue to the PulseAudio developers.", - (unsigned long) k, (unsigned long) (pa_bytes_to_usec(k, ss) / PA_USEC_PER_MSEC)); - - return r; -} -- cgit