+++ /dev/null
-/* $Id$ */
-
-/***
- 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 <sys/types.h>
-#include <asoundlib.h>
-
-#include "alsa-util.h"
-#include "sample.h"
-#include "xmalloc.h"
-#include "log.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;
- 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,
- };
- 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, &ss->rate, 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)
- goto finish;
-
- if (snd_pcm_prepare(pcm_handle) < 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)
- goto finish;
-
- assert(buffer_size > 0);
- assert(*period_size > 0);
- *periods = buffer_size / *period_size;
- 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);
-
- *n_io_events = snd_pcm_poll_descriptors_count(pcm_handle);
-
- pfds = pa_xmalloc(sizeof(struct pollfd) * *n_io_events);
- if (snd_pcm_poll_descriptors(pcm_handle, pfds, *n_io_events) < 0) {
- pa_xfree(pfds);
- 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);
- }
-
- 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);
-}