code.delx.au - pulseaudio/blob - src/pulsecore/source.h

   1 #ifndef foopulsesourcehfoo
   2 #define foopulsesourcehfoo
   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 typedef struct pa_source pa_source;
  27
  28 #include <inttypes.h>
  29
  30 #include <pulse/sample.h>
  31 #include <pulse/channelmap.h>
  32 #include <pulse/volume.h>
  33
  34 #include <pulsecore/core.h>
  35 #include <pulsecore/idxset.h>
  36 #include <pulsecore/memblock.h>
  37 #include <pulsecore/memchunk.h>
  38 #include <pulsecore/sink.h>
  39 #include <pulsecore/module.h>
  40 #include <pulsecore/asyncmsgq.h>
  41 #include <pulsecore/msgobject.h>
  42 #include <pulsecore/rtpoll.h>
  43 #include <pulsecore/source-output.h>
  44 #include <pulsecore/card.h>
  45 #include <pulsecore/queue.h>
  46
  47 #define PA_MAX_OUTPUTS_PER_SOURCE 32
  48
  49 /* Returns true if source is linked: registered and accessible from client side. */
  50 static inline pa_bool_t PA_SOURCE_IS_LINKED(pa_source_state_t x) {
  51     return x == PA_SOURCE_RUNNING || x == PA_SOURCE_IDLE || x == PA_SOURCE_SUSPENDED;
  52 }
  53
  54 struct pa_source {
  55     pa_msgobject parent;
  56
  57     uint32_t index;
  58     pa_core *core;
  59     pa_source_state_t state;
  60     pa_source_flags_t flags;
  61
  62     char *name;
  63     char *driver;                             /* may be NULL */
  64     pa_proplist *proplist;
  65
  66     pa_module *module;                        /* may be NULL */
  67     pa_card *card;                            /* may be NULL */
  68
  69     pa_sample_spec sample_spec;
  70     pa_channel_map channel_map;
  71
  72     pa_idxset *outputs;
  73     unsigned n_corked;
  74     pa_sink *monitor_of;                     /* may be NULL */
  75
  76     pa_volume_t base_volume; /* shall be constant */
  77     unsigned n_volume_steps; /* shall be constant */
  78
  79     pa_cvolume virtual_volume, soft_volume;
  80     pa_bool_t muted:1;
  81
  82     pa_bool_t refresh_volume:1;
  83     pa_bool_t refresh_muted:1;
  84
  85     pa_asyncmsgq *asyncmsgq;
  86     pa_rtpoll *rtpoll;
  87
  88     pa_memchunk silence;
  89
  90     /* Called when the main loop requests a state change. Called from
  91      * main loop context. If returns -1 the state change will be
  92      * inhibited */
  93     int (*set_state)(pa_source*source, pa_source_state_t state); /* may be NULL */
  94
  95     /* Callled when the volume is queried. Called from main loop
  96      * context. If this is NULL a PA_SOURCE_MESSAGE_GET_VOLUME message
  97      * will be sent to the IO thread instead. If refresh_volume is
  98      * FALSE neither this function is called nor a message is sent. */
  99     void (*get_volume)(pa_source *s);         /* dito */
 100
 101     /* Called when the volume shall be changed. Called from main loop
 102      * context. If this is NULL a PA_SOURCE_MESSAGE_SET_VOLUME message
 103      * will be sent to the IO thread instead. */
 104     void (*set_volume)(pa_source *s);         /* dito */
 105
 106     /* Called when the mute setting is queried. Called from main loop
 107      * context. If this is NULL a PA_SOURCE_MESSAGE_GET_MUTE message
 108      * will be sent to the IO thread instead. If refresh_mute is
 109      * FALSE neither this function is called nor a message is sent.*/
 110     void (*get_mute)(pa_source *s);           /* dito */
 111
 112     /* Called when the mute setting shall be changed. Called from main
 113      * loop context. If this is NULL a PA_SOURCE_MESSAGE_SET_MUTE
 114      * message will be sent to the IO thread instead. */
 115     void (*set_mute)(pa_source *s);           /* dito */
 116
 117     /* Called when a the requested latency is changed. Called from IO
 118      * thread context. */
 119     void (*update_requested_latency)(pa_source *s); /* dito */
 120
 121     /* Contains copies of the above data so that the real-time worker
 122      * thread can work without access locking */
 123     struct {
 124         pa_source_state_t state;
 125         pa_hashmap *outputs;
 126
 127         pa_cvolume soft_volume;
 128         pa_bool_t soft_muted:1;
 129
 130         pa_bool_t requested_latency_valid:1;
 131         pa_usec_t requested_latency;
 132
 133         /* Then number of bytes this source will be rewound for at
 134          * max. (Only used on monitor sources) */
 135         size_t max_rewind;
 136
 137         pa_usec_t min_latency; /* we won't go below this latency */
 138         pa_usec_t max_latency; /* An upper limit for the latencies */
 139     } thread_info;
 140
 141     void *userdata;
 142 };
 143
 144 PA_DECLARE_CLASS(pa_source);
 145 #define PA_SOURCE(s) pa_source_cast(s)
 146
 147 typedef enum pa_source_message {
 148     PA_SOURCE_MESSAGE_ADD_OUTPUT,
 149     PA_SOURCE_MESSAGE_REMOVE_OUTPUT,
 150     PA_SOURCE_MESSAGE_GET_VOLUME,
 151     PA_SOURCE_MESSAGE_SET_VOLUME,
 152     PA_SOURCE_MESSAGE_GET_MUTE,
 153     PA_SOURCE_MESSAGE_SET_MUTE,
 154     PA_SOURCE_MESSAGE_GET_LATENCY,
 155     PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY,
 156     PA_SOURCE_MESSAGE_SET_STATE,
 157     PA_SOURCE_MESSAGE_ATTACH,
 158     PA_SOURCE_MESSAGE_DETACH,
 159     PA_SOURCE_MESSAGE_SET_LATENCY_RANGE,
 160     PA_SOURCE_MESSAGE_GET_LATENCY_RANGE,
 161     PA_SOURCE_MESSAGE_GET_MAX_REWIND,
 162     PA_SOURCE_MESSAGE_MAX
 163 } pa_source_message_t;
 164
 165 typedef struct pa_source_new_data {
 166     char *name;
 167     pa_proplist *proplist;
 168
 169     const char *driver;
 170     pa_module *module;
 171     pa_card *card;
 172
 173     pa_sample_spec sample_spec;
 174     pa_channel_map channel_map;
 175     pa_cvolume volume;
 176     pa_bool_t muted:1;
 177
 178     pa_bool_t volume_is_set:1;
 179     pa_bool_t muted_is_set:1;
 180     pa_bool_t sample_spec_is_set:1;
 181     pa_bool_t channel_map_is_set:1;
 182
 183     pa_bool_t namereg_fail:1;
 184 } pa_source_new_data;
 185
 186 pa_source_new_data* pa_source_new_data_init(pa_source_new_data *data);
 187 void pa_source_new_data_set_name(pa_source_new_data *data, const char *name);
 188 void pa_source_new_data_set_sample_spec(pa_source_new_data *data, const pa_sample_spec *spec);
 189 void pa_source_new_data_set_channel_map(pa_source_new_data *data, const pa_channel_map *map);
 190 void pa_source_new_data_set_volume(pa_source_new_data *data, const pa_cvolume *volume);
 191 void pa_source_new_data_set_muted(pa_source_new_data *data, pa_bool_t mute);
 192 void pa_source_new_data_done(pa_source_new_data *data);
 193
 194 /*** To be called exclusively by the source driver, from main context */
 195
 196 pa_source* pa_source_new(
 197         pa_core *core,
 198         pa_source_new_data *data,
 199         pa_source_flags_t flags);
 200
 201 void pa_source_put(pa_source *s);
 202 void pa_source_unlink(pa_source *s);
 203
 204 void pa_source_set_description(pa_source *s, const char *description);
 205 void pa_source_set_asyncmsgq(pa_source *s, pa_asyncmsgq *q);
 206 void pa_source_set_rtpoll(pa_source *s, pa_rtpoll *p);
 207
 208 void pa_source_set_latency_range(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency);
 209
 210 void pa_source_detach(pa_source *s);
 211 void pa_source_attach(pa_source *s);
 212
 213 void pa_source_set_soft_volume(pa_source *s, const pa_cvolume *volume);
 214
 215 /*** May be called by everyone, from main context */
 216
 217 /* The returned value is supposed to be in the time domain of the sound card! */
 218 pa_usec_t pa_source_get_latency(pa_source *s);
 219 pa_usec_t pa_source_get_requested_latency(pa_source *s);
 220 void pa_source_get_latency_range(pa_source *s, pa_usec_t *min_latency, pa_usec_t *max_latency);
 221
 222 size_t pa_source_get_max_rewind(pa_source *s);
 223
 224 int pa_source_update_status(pa_source*s);
 225 int pa_source_suspend(pa_source *s, pa_bool_t suspend);
 226 int pa_source_suspend_all(pa_core *c, pa_bool_t suspend);
 227
 228 void pa_source_set_volume(pa_source *source, const pa_cvolume *volume);
 229 const pa_cvolume *pa_source_get_volume(pa_source *source, pa_bool_t force_refresh);
 230 void pa_source_set_mute(pa_source *source, pa_bool_t mute);
 231 pa_bool_t pa_source_get_mute(pa_source *source, pa_bool_t force_refresh);
 232
 233 pa_bool_t pa_source_update_proplist(pa_source *s, pa_update_mode_t mode, pa_proplist *p);
 234
 235 unsigned pa_source_linked_by(pa_source *s); /* Number of connected streams */
 236 unsigned pa_source_used_by(pa_source *s); /* Number of connected streams that are not corked */
 237 unsigned pa_source_check_suspend(pa_source *s); /* Returns how many streams are active that don't allow suspensions */
 238 #define pa_source_get_state(s) ((pa_source_state_t) (s)->state)
 239
 240 /* Moves all inputs away, and stores them in pa_queue */
 241 pa_queue *pa_source_move_all_start(pa_source *s);
 242 void pa_source_move_all_finish(pa_source *s, pa_queue *q, pa_bool_t save);
 243 void pa_source_move_all_fail(pa_queue *q);
 244
 245 /*** To be called exclusively by the source driver, from IO context */
 246
 247 void pa_source_post(pa_source*s, const pa_memchunk *chunk);
 248 void pa_source_post_direct(pa_source*s, pa_source_output *o, const pa_memchunk *chunk);
 249 void pa_source_process_rewind(pa_source *s, size_t nbytes);
 250
 251 int pa_source_process_msg(pa_msgobject *o, int code, void *userdata, int64_t, pa_memchunk *chunk);
 252
 253 void pa_source_attach_within_thread(pa_source *s);
 254 void pa_source_detach_within_thread(pa_source *s);
 255
 256 pa_usec_t pa_source_get_requested_latency_within_thread(pa_source *s);
 257
 258 void pa_source_set_max_rewind(pa_source *s, size_t max_rewind);
 259 void pa_source_update_latency_range(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency);
 260
 261 /*** To be called exclusively by source output drivers, from IO context */
 262
 263 void pa_source_invalidate_requested_latency(pa_source *s);
 264
 265 #endif