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https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-17 06:59:56 -05:00
port module-alsa-sink to new lock-free core. also add mmmap'ing support while doing so.
git-svn-id: file:///home/lennart/svn/public/pulseaudio/branches/lennart@1551 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering
parent
c7df4ba6c3
commit
787f93533c
5 changed files with 745 additions and 601 deletions
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@ -36,219 +36,6 @@
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#include "alsa-util.h"
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struct pa_alsa_fdlist {
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int num_fds;
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struct pollfd *fds;
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/* This is a temporary buffer used to avoid lots of mallocs */
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struct pollfd *work_fds;
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snd_pcm_t *pcm;
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snd_mixer_t *mixer;
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pa_mainloop_api *m;
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pa_defer_event *defer;
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pa_io_event **ios;
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int polled;
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void (*cb)(void *userdata);
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void *userdata;
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};
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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) {
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struct pa_alsa_fdlist *fdl = (struct pa_alsa_fdlist*)userdata;
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int err, i;
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unsigned short revents;
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assert(a && fdl && (fdl->pcm || fdl->mixer) && fdl->fds && fdl->work_fds);
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if (fdl->polled)
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return;
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fdl->polled = 1;
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memcpy(fdl->work_fds, fdl->fds, sizeof(struct pollfd) * fdl->num_fds);
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for (i = 0;i < fdl->num_fds;i++) {
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if (e == fdl->ios[i]) {
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if (events & PA_IO_EVENT_INPUT)
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fdl->work_fds[i].revents |= POLLIN;
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if (events & PA_IO_EVENT_OUTPUT)
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fdl->work_fds[i].revents |= POLLOUT;
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if (events & PA_IO_EVENT_ERROR)
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fdl->work_fds[i].revents |= POLLERR;
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if (events & PA_IO_EVENT_HANGUP)
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fdl->work_fds[i].revents |= POLLHUP;
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break;
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}
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}
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assert(i != fdl->num_fds);
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if (fdl->pcm)
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err = snd_pcm_poll_descriptors_revents(fdl->pcm, fdl->work_fds, fdl->num_fds, &revents);
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else
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err = snd_mixer_poll_descriptors_revents(fdl->mixer, fdl->work_fds, fdl->num_fds, &revents);
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if (err < 0) {
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pa_log_error("Unable to get poll revent: %s",
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snd_strerror(err));
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return;
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}
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a->defer_enable(fdl->defer, 1);
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if (revents) {
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if (fdl->pcm)
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fdl->cb(fdl->userdata);
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else
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snd_mixer_handle_events(fdl->mixer);
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}
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}
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static void defer_cb(pa_mainloop_api*a, PA_GCC_UNUSED pa_defer_event* e, void *userdata) {
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struct pa_alsa_fdlist *fdl = (struct pa_alsa_fdlist*)userdata;
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int num_fds, i, err;
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struct pollfd *temp;
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assert(a && fdl && (fdl->pcm || fdl->mixer));
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a->defer_enable(fdl->defer, 0);
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if (fdl->pcm)
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num_fds = snd_pcm_poll_descriptors_count(fdl->pcm);
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else
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num_fds = snd_mixer_poll_descriptors_count(fdl->mixer);
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assert(num_fds > 0);
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if (num_fds != fdl->num_fds) {
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if (fdl->fds)
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pa_xfree(fdl->fds);
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if (fdl->work_fds)
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pa_xfree(fdl->work_fds);
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fdl->fds = pa_xmalloc0(sizeof(struct pollfd) * num_fds);
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fdl->work_fds = pa_xmalloc(sizeof(struct pollfd) * num_fds);
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}
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memset(fdl->work_fds, 0, sizeof(struct pollfd) * num_fds);
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if (fdl->pcm)
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err = snd_pcm_poll_descriptors(fdl->pcm, fdl->work_fds, num_fds);
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else
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err = snd_mixer_poll_descriptors(fdl->mixer, fdl->work_fds, num_fds);
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if (err < 0) {
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pa_log_error("Unable to get poll descriptors: %s",
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snd_strerror(err));
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return;
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}
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fdl->polled = 0;
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if (memcmp(fdl->fds, fdl->work_fds, sizeof(struct pollfd) * num_fds) == 0)
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return;
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if (fdl->ios) {
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for (i = 0;i < fdl->num_fds;i++)
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a->io_free(fdl->ios[i]);
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if (num_fds != fdl->num_fds) {
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pa_xfree(fdl->ios);
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fdl->ios = pa_xmalloc(sizeof(pa_io_event*) * num_fds);
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assert(fdl->ios);
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}
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} else {
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fdl->ios = pa_xmalloc(sizeof(pa_io_event*) * num_fds);
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assert(fdl->ios);
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}
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/* Swap pointers */
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temp = fdl->work_fds;
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fdl->work_fds = fdl->fds;
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fdl->fds = temp;
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fdl->num_fds = num_fds;
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for (i = 0;i < num_fds;i++) {
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fdl->ios[i] = a->io_new(a, fdl->fds[i].fd,
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((fdl->fds[i].events & POLLIN) ? PA_IO_EVENT_INPUT : 0) |
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((fdl->fds[i].events & POLLOUT) ? PA_IO_EVENT_OUTPUT : 0),
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io_cb, fdl);
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assert(fdl->ios[i]);
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}
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}
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struct pa_alsa_fdlist *pa_alsa_fdlist_new(void) {
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struct pa_alsa_fdlist *fdl;
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fdl = pa_xmalloc(sizeof(struct pa_alsa_fdlist));
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fdl->num_fds = 0;
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fdl->fds = NULL;
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fdl->work_fds = NULL;
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fdl->pcm = NULL;
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fdl->mixer = NULL;
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fdl->m = NULL;
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fdl->defer = NULL;
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fdl->ios = NULL;
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fdl->polled = 0;
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return fdl;
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}
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void pa_alsa_fdlist_free(struct pa_alsa_fdlist *fdl) {
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assert(fdl);
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if (fdl->defer) {
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assert(fdl->m);
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fdl->m->defer_free(fdl->defer);
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}
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if (fdl->ios) {
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int i;
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assert(fdl->m);
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for (i = 0;i < fdl->num_fds;i++)
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fdl->m->io_free(fdl->ios[i]);
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pa_xfree(fdl->ios);
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}
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if (fdl->fds)
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pa_xfree(fdl->fds);
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if (fdl->work_fds)
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pa_xfree(fdl->work_fds);
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pa_xfree(fdl);
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}
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int pa_alsa_fdlist_init_pcm(struct pa_alsa_fdlist *fdl, snd_pcm_t *pcm_handle, pa_mainloop_api* m, void (*cb)(void *userdata), void *userdata) {
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assert(fdl && pcm_handle && m && !fdl->m && cb);
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fdl->pcm = pcm_handle;
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fdl->m = m;
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fdl->defer = m->defer_new(m, defer_cb, fdl);
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assert(fdl->defer);
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fdl->cb = cb;
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fdl->userdata = userdata;
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return 0;
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}
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int pa_alsa_fdlist_init_mixer(struct pa_alsa_fdlist *fdl, snd_mixer_t *mixer_handle, pa_mainloop_api* m) {
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assert(fdl && mixer_handle && m && !fdl->m);
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fdl->mixer = mixer_handle;
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fdl->m = m;
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fdl->defer = m->defer_new(m, defer_cb, fdl);
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assert(fdl->defer);
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return 0;
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}
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static int set_format(snd_pcm_t *pcm_handle, snd_pcm_hw_params_t *hwparams, pa_sample_format_t *f) {
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static const snd_pcm_format_t format_trans[] = {
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@ -308,7 +95,7 @@ try_auto:
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/* Set the hardware parameters of the given ALSA device. Returns the
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* selected fragment settings in *period and *period_size */
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int pa_alsa_set_hw_params(snd_pcm_t *pcm_handle, pa_sample_spec *ss, uint32_t *periods, snd_pcm_uframes_t *period_size) {
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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) {
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int ret = -1;
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snd_pcm_uframes_t buffer_size;
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unsigned int r = ss->rate;
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@ -325,10 +112,19 @@ int pa_alsa_set_hw_params(snd_pcm_t *pcm_handle, pa_sample_spec *ss, uint32_t *p
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if ((ret = snd_pcm_hw_params_malloc(&hwparams)) < 0 ||
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(ret = snd_pcm_hw_params_any(pcm_handle, hwparams)) < 0 ||
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(ret = snd_pcm_hw_params_set_rate_resample(pcm_handle, hwparams, 0)) < 0 ||
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(ret = snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0)
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(ret = snd_pcm_hw_params_set_rate_resample(pcm_handle, hwparams, 0)) < 0)
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goto finish;
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if (use_mmap && *use_mmap) {
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if ((ret = snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_MMAP_INTERLEAVED)) < 0)
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if ((ret = snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0)
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goto finish;
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} else if ((ret = snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0)
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goto finish;
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else if (*use_mmap)
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*use_mmap = 0;
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if ((ret = set_format(pcm_handle, hwparams, &f)) < 0)
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goto finish;
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