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 typedef struct pa_alsa_profile_info {
  58     pa_channel_map map;
  59     const char *alsa_name;
  60     const char *description;
  61     const char *name;
  62     unsigned priority;
  63 } pa_alsa_profile_info;
  64
  65 /* Picks a working profile based on the specified ss/map */
  66 snd_pcm_t *pa_alsa_open_by_device_id_auto(
  67         const char *dev_id,
  68         char **dev,
  69         pa_sample_spec *ss,
  70         pa_channel_map* map,
  71         int mode,
  72         uint32_t *nfrags,
  73         snd_pcm_uframes_t *period_size,
  74         snd_pcm_uframes_t tsched_size,
  75         pa_bool_t *use_mmap,
  76         pa_bool_t *use_tsched,
  77         const pa_alsa_profile_info **profile);
  78
  79 /* Uses the specified profile */
  80 snd_pcm_t *pa_alsa_open_by_device_id_profile(
  81         const char *dev_id,
  82         char **dev,
  83         pa_sample_spec *ss,
  84         pa_channel_map* map,
  85         int mode,
  86         uint32_t *nfrags,
  87         snd_pcm_uframes_t *period_size,
  88         snd_pcm_uframes_t tsched_size,
  89         pa_bool_t *use_mmap,
  90         pa_bool_t *use_tsched,
  91         const pa_alsa_profile_info *profile);
  92
  93 /* Opens the explicit ALSA device */
  94 snd_pcm_t *pa_alsa_open_by_device_string(
  95         const char *device,
  96         char **dev,
  97         pa_sample_spec *ss,
  98         pa_channel_map* map,
  99         int mode,
 100         uint32_t *nfrags,
 101         snd_pcm_uframes_t *period_size,
 102         snd_pcm_uframes_t tsched_size,
 103         pa_bool_t *use_mmap,
 104         pa_bool_t *use_tsched,
 105         pa_bool_t require_exact_channel_number);
 106
 107 int pa_alsa_probe_profiles(
 108         const char *dev_id,
 109         const pa_sample_spec *ss,
 110         void (*cb)(const pa_alsa_profile_info *sink, const pa_alsa_profile_info *source, void *userdata),
 111         void *userdata);
 112
 113 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);
 114
 115 void pa_alsa_dump(snd_pcm_t *pcm);
 116 void pa_alsa_dump_status(snd_pcm_t *pcm);
 117
 118 void pa_alsa_redirect_errors_inc(void);
 119 void pa_alsa_redirect_errors_dec(void);
 120
 121 void pa_alsa_init_proplist_pcm(pa_proplist *p, snd_pcm_info_t *pcm_info);
 122 void pa_alsa_init_proplist_card(pa_proplist *p, int card);
 123
 124 int pa_alsa_recover_from_poll(snd_pcm_t *pcm, int revents);
 125
 126 pa_rtpoll_item* pa_alsa_build_pollfd(snd_pcm_t *pcm, pa_rtpoll *rtpoll);
 127
 128 snd_pcm_sframes_t pa_alsa_safe_avail_update(snd_pcm_t *pcm, size_t hwbuf_size, const pa_sample_spec *ss);
 129 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);
 130
 131 #endif