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 2.1 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 #include <pulsecore/core.h>
  36
  37 typedef struct pa_alsa_fdlist pa_alsa_fdlist;
  38
  39 struct pa_alsa_fdlist *pa_alsa_fdlist_new(void);
  40 void pa_alsa_fdlist_free(struct pa_alsa_fdlist *fdl);
  41 int pa_alsa_fdlist_set_mixer(struct pa_alsa_fdlist *fdl, snd_mixer_t *mixer_handle, pa_mainloop_api* m);
  42
  43 int pa_alsa_set_hw_params(
  44         snd_pcm_t *pcm_handle,
  45         pa_sample_spec *ss,
  46         uint32_t *periods,
  47         snd_pcm_uframes_t *period_size,
  48         snd_pcm_uframes_t tsched_size,
  49         pa_bool_t *use_mmap,
  50         pa_bool_t *use_tsched,
  51         pa_bool_t require_exact_channel_number);
  52
  53 int pa_alsa_set_sw_params(snd_pcm_t *pcm, snd_pcm_uframes_t avail_min);
  54
  55 int pa_alsa_prepare_mixer(snd_mixer_t *mixer, const char *dev);
  56 snd_mixer_elem_t *pa_alsa_find_elem(snd_mixer_t *mixer, const char *name, const char *fallback, pa_bool_t playback);
  57 int pa_alsa_find_mixer_and_elem(snd_pcm_t *pcm, snd_mixer_t **_m, snd_mixer_elem_t **_e, const char *control_name);
  58
  59 typedef struct pa_alsa_profile_info {
  60     pa_channel_map map;
  61     const char *alsa_name;
  62     const char *description; /* internationalized */
  63     const char *name;
  64     unsigned priority;
  65 } pa_alsa_profile_info;
  66
  67 /* Picks a working profile based on the specified ss/map */
  68 snd_pcm_t *pa_alsa_open_by_device_id_auto(
  69         const char *dev_id,
  70         char **dev,
  71         pa_sample_spec *ss,
  72         pa_channel_map* map,
  73         int mode,
  74         uint32_t *nfrags,
  75         snd_pcm_uframes_t *period_size,
  76         snd_pcm_uframes_t tsched_size,
  77         pa_bool_t *use_mmap,
  78         pa_bool_t *use_tsched,
  79         const pa_alsa_profile_info **profile);
  80
  81 /* Uses the specified profile */
  82 snd_pcm_t *pa_alsa_open_by_device_id_profile(
  83         const char *dev_id,
  84         char **dev,
  85         pa_sample_spec *ss,
  86         pa_channel_map* map,
  87         int mode,
  88         uint32_t *nfrags,
  89         snd_pcm_uframes_t *period_size,
  90         snd_pcm_uframes_t tsched_size,
  91         pa_bool_t *use_mmap,
  92         pa_bool_t *use_tsched,
  93         const pa_alsa_profile_info *profile);
  94
  95 /* Opens the explicit ALSA device */
  96 snd_pcm_t *pa_alsa_open_by_device_string(
  97         const char *device,
  98         char **dev,
  99         pa_sample_spec *ss,
 100         pa_channel_map* map,
 101         int mode,
 102         uint32_t *nfrags,
 103         snd_pcm_uframes_t *period_size,
 104         snd_pcm_uframes_t tsched_size,
 105         pa_bool_t *use_mmap,
 106         pa_bool_t *use_tsched,
 107         pa_bool_t require_exact_channel_number);
 108
 109 int pa_alsa_probe_profiles(
 110         const char *dev_id,
 111         const pa_sample_spec *ss,
 112         void (*cb)(const pa_alsa_profile_info *sink, const pa_alsa_profile_info *source, void *userdata),
 113         void *userdata);
 114
 115 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);
 116
 117 void pa_alsa_dump(snd_pcm_t *pcm);
 118 void pa_alsa_dump_status(snd_pcm_t *pcm);
 119
 120 void pa_alsa_redirect_errors_inc(void);
 121 void pa_alsa_redirect_errors_dec(void);
 122
 123 void pa_alsa_init_proplist_pcm_info(pa_core *c, pa_proplist *p, snd_pcm_info_t *pcm_info);
 124 void pa_alsa_init_proplist_card(pa_core *c, pa_proplist *p, int card);
 125 void pa_alsa_init_proplist_pcm(pa_core *c, pa_proplist *p, snd_pcm_t *pcm);
 126 pa_bool_t pa_alsa_init_description(pa_proplist *p);
 127
 128 int pa_alsa_recover_from_poll(snd_pcm_t *pcm, int revents);
 129
 130 pa_rtpoll_item* pa_alsa_build_pollfd(snd_pcm_t *pcm, pa_rtpoll *rtpoll);
 131
 132 snd_pcm_sframes_t pa_alsa_safe_avail(snd_pcm_t *pcm, size_t hwbuf_size, const pa_sample_spec *ss);
 133 int pa_alsa_safe_delay(snd_pcm_t *pcm, snd_pcm_sframes_t *delay, size_t hwbuf_size, const pa_sample_spec *ss);
 134 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);
 135
 136 char *pa_alsa_get_driver_name(int card);
 137
 138 char *pa_alsa_get_driver_name_by_pcm(snd_pcm_t *pcm);
 139
 140 char *pa_alsa_get_reserve_name(const char *device);
 141
 142 pa_bool_t pa_alsa_pcm_is_hw(snd_pcm_t *pcm);
 143
 144 #endif