code.delx.au - pulseaudio/blob - src/modules/alsa/alsa-util.h

   1 #ifndef fooalsautilhfoo
   2 #define fooalsautilhfoo
   3
   4 /***
   5   This file is part of PulseAudio.
   6
   7   Copyright 2004-2006 Lennart Poettering
   8   Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
   9
  10   PulseAudio is free software; you can redistribute it and/or modify
  11   it under the terms of the GNU Lesser General Public License as published
  12   by the Free Software Foundation; either version 2 of the License,
  13   or (at your option) any later version.
  14
  15   PulseAudio is distributed in the hope that it will be useful, but
  16   WITHOUT ANY WARRANTY; without even the implied warranty of
  17   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18   General Public License for more details.
  19
  20   You should have received a copy of the GNU Lesser General Public License
  21   along with PulseAudio; if not, write to the Free Software
  22   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  23   USA.
  24 ***/
  25
  26 #include <asoundlib.h>
  27
  28 #include <pulse/sample.h>
  29 #include <pulse/volume.h>
  30 #include <pulse/mainloop-api.h>
  31 #include <pulse/channelmap.h>
  32 #include <pulse/proplist.h>
  33
  34 #include <pulsecore/rtpoll.h>
  35
  36 typedef struct pa_alsa_fdlist pa_alsa_fdlist;
  37
  38 struct pa_alsa_fdlist *pa_alsa_fdlist_new(void);
  39 void pa_alsa_fdlist_free(struct pa_alsa_fdlist *fdl);
  40 int pa_alsa_fdlist_set_mixer(struct pa_alsa_fdlist *fdl, snd_mixer_t *mixer_handle, pa_mainloop_api* m);
  41
  42 int pa_alsa_set_hw_params(
  43         snd_pcm_t *pcm_handle,
  44         pa_sample_spec *ss,
  45         uint32_t *periods,
  46         snd_pcm_uframes_t *period_size,
  47         snd_pcm_uframes_t tsched_size,
  48         pa_bool_t *use_mmap,
  49         pa_bool_t *use_tsched,
  50         pa_bool_t require_exact_channel_number);
  51
  52 int pa_alsa_set_sw_params(snd_pcm_t *pcm, snd_pcm_uframes_t avail_min);
  53
  54 int pa_alsa_prepare_mixer(snd_mixer_t *mixer, const char *dev);
  55 snd_mixer_elem_t *pa_alsa_find_elem(snd_mixer_t *mixer, const char *name, const char *fallback, pa_bool_t playback);
  56
  57 snd_pcm_t *pa_alsa_open_by_device_id(
  58         const char *dev_id,
  59         char **dev,
  60         pa_sample_spec *ss,
  61         pa_channel_map* map,
  62         int mode,
  63         uint32_t *nfrags,
  64         snd_pcm_uframes_t *period_size,
  65         snd_pcm_uframes_t tsched_size,
  66         pa_bool_t *use_mmap,
  67         pa_bool_t *use_tsched,
  68         const char **config_name,
  69         const char **config_description);
  70
  71 snd_pcm_t *pa_alsa_open_by_device_string(
  72         const char *device,
  73         char **dev,
  74         pa_sample_spec *ss,
  75         pa_channel_map* map,
  76         int mode,
  77         uint32_t *nfrags,
  78         snd_pcm_uframes_t *period_size,
  79         snd_pcm_uframes_t tsched_size,
  80         pa_bool_t *use_mmap,
  81         pa_bool_t *use_tsched);
  82
  83 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);
  84
  85 void pa_alsa_dump(snd_pcm_t *pcm);
  86 void pa_alsa_dump_status(snd_pcm_t *pcm);
  87
  88 void pa_alsa_redirect_errors_inc(void);
  89 void pa_alsa_redirect_errors_dec(void);
  90
  91 void pa_alsa_init_proplist(pa_proplist *p, snd_pcm_info_t *pcm_info);
  92
  93 int pa_alsa_recover_from_poll(snd_pcm_t *pcm, int revents);
  94
  95 pa_rtpoll_item* pa_alsa_build_pollfd(snd_pcm_t *pcm, pa_rtpoll *rtpoll);
  96
  97 snd_pcm_sframes_t pa_alsa_safe_avail_update(snd_pcm_t *pcm, size_t hwbuf_size, const pa_sample_spec *ss);
  98 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);
  99
 100 #endif