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

   1 #ifndef foopulsesinkhfoo
   2 #define foopulsesinkhfoo
   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 typedef struct pa_sink pa_sink;
  27 typedef struct pa_device_port pa_device_port;
  28 typedef struct pa_sink_volume_change pa_sink_volume_change;
  29
  30 #include <inttypes.h>
  31
  32 #include <pulse/def.h>
  33 #include <pulse/sample.h>
  34 #include <pulse/channelmap.h>
  35 #include <pulse/volume.h>
  36
  37 #include <pulsecore/core.h>
  38 #include <pulsecore/idxset.h>
  39 #include <pulsecore/source.h>
  40 #include <pulsecore/module.h>
  41 #include <pulsecore/refcnt.h>
  42 #include <pulsecore/msgobject.h>
  43 #include <pulsecore/rtpoll.h>
  44 #include <pulsecore/card.h>
  45 #include <pulsecore/queue.h>
  46 #include <pulsecore/thread-mq.h>
  47 #include <pulsecore/sink-input.h>
  48
  49 #define PA_MAX_INPUTS_PER_SINK 32
  50
  51 /* Returns true if sink is linked: registered and accessible from client side. */
  52 static inline pa_bool_t PA_SINK_IS_LINKED(pa_sink_state_t x) {
  53     return x == PA_SINK_RUNNING || x == PA_SINK_IDLE || x == PA_SINK_SUSPENDED;
  54 }
  55
  56 struct pa_device_port {
  57     char *name;
  58     char *description;
  59
  60     unsigned priority;
  61
  62     /* .. followed by some implementation specific data */
  63 };
  64
  65 #define PA_DEVICE_PORT_DATA(d) ((void*) ((uint8_t*) d + PA_ALIGN(sizeof(pa_device_port))))
  66
  67 struct pa_sink {
  68     pa_msgobject parent;
  69
  70     uint32_t index;
  71     pa_core *core;
  72
  73     pa_sink_state_t state;
  74     pa_sink_flags_t flags;
  75     pa_suspend_cause_t suspend_cause;
  76
  77     char *name;
  78     char *driver;                           /* may be NULL */
  79     pa_proplist *proplist;
  80
  81     pa_module *module;                      /* may be NULL */
  82     pa_card *card;                          /* may be NULL */
  83
  84     pa_sample_spec sample_spec;
  85     pa_channel_map channel_map;
  86
  87     pa_idxset *inputs;
  88     unsigned n_corked;
  89     pa_source *monitor_source;
  90     pa_sink_input *input_to_master;         /* non-NULL only for filter sinks */
  91
  92     pa_volume_t base_volume; /* shall be constant */
  93     unsigned n_volume_steps; /* shall be constant */
  94
  95     /* Also see http://pulseaudio.org/wiki/InternalVolumes */
  96     pa_cvolume reference_volume; /* The volume exported and taken as reference base for relative sink input volumes */
  97     pa_cvolume real_volume;      /* The volume that the hardware is configured to  */
  98     pa_cvolume soft_volume;      /* The internal software volume we apply to all PCM data while it passes through */
  99
 100     pa_bool_t muted:1;
 101
 102     pa_bool_t refresh_volume:1;
 103     pa_bool_t refresh_muted:1;
 104     pa_bool_t save_port:1;
 105     pa_bool_t save_volume:1;
 106     pa_bool_t save_muted:1;
 107
 108     pa_asyncmsgq *asyncmsgq;
 109
 110     pa_memchunk silence;
 111
 112     pa_hashmap *ports;
 113     pa_device_port *active_port;
 114
 115     unsigned priority;
 116
 117     /* Called when the main loop requests a state change. Called from
 118      * main loop context. If returns -1 the state change will be
 119      * inhibited */
 120     int (*set_state)(pa_sink *s, pa_sink_state_t state); /* may be NULL */
 121
 122     /* Sink drivers that support hardware volume may set this
 123      * callback. This is called when the current volume needs to be
 124      * re-read from the hardware.
 125      *
 126      * There are two ways for drivers to implement hardware volume
 127      * query: either set this callback or handle
 128      * PA_SINK_MESSAGE_GET_VOLUME. The callback implementation or the
 129      * message handler must update s->real_volume and s->soft_volume
 130      * (using pa_sink_set_soft_volume()) to match the current hardware
 131      * volume.
 132      *
 133      * If PA_SINK_SYNC_VOLUME is not set, then this is called from the
 134      * main thread before sending PA_SINK_MESSAGE_GET_VOLUME, so in
 135      * this case the driver can choose whether to read the volume from
 136      * the hardware in the main thread or in the IO thread.
 137      *
 138      * If PA_SINK_SYNC_VOLUME is set, then this is called from the IO
 139      * thread within the default handler for
 140      * PA_SINK_MESSAGE_GET_VOLUME (the main thread is waiting while
 141      * the message is being processed), so there's no choice of where
 142      * to do the volume reading - it has to be done in the IO thread
 143      * always. */
 144     void (*get_volume)(pa_sink *s);             /* may be NULL */
 145
 146     /* Sink drivers that support hardware volume must set this
 147      * callback. This is called when the hardware volume needs to be
 148      * updated.
 149      *
 150      * If PA_SINK_SYNC_VOLUME is not set, then this is called from the
 151      * main thread. The callback implementation must set the hardware
 152      * volume according to s->real_volume. If the driver can't set the
 153      * hardware volume to the exact requested value, it has to update
 154      * s->real_volume and/or s->soft_volume so that they together
 155      * match the actual hardware volume that was set.
 156      *
 157      * If PA_SINK_SYNC_VOLUME is set, then this is called from the IO
 158      * thread. The callback implementation must not actually set the
 159      * hardware volume yet, but it must check how close to the
 160      * requested volume the hardware volume can be set, and update
 161      * s->real_volume and/or s->soft_volume so that they together
 162      * match the actual hardware volume that will be set later in the
 163      * write_volume callback. */
 164     void (*set_volume)(pa_sink *s);             /* dito */
 165
 166     /* Sink drivers that set PA_SINK_SYNC_VOLUME must provide this
 167      * callback. This callback is not used with sinks that do not set
 168      * PA_SINK_SYNC_VOLUME. This is called from the IO thread when a
 169      * pending hardware volume change has to be written to the
 170      * hardware. The requested volume is passed to the callback
 171      * implementation in s->thread_info.current_hw_volume.
 172      *
 173      * The call is done inside pa_sink_volume_change_apply(), which is
 174      * not called automatically - it is the driver's responsibility to
 175      * schedule that function to be called at the right times in the
 176      * IO thread. */
 177     void (*write_volume)(pa_sink *s);           /* dito */
 178
 179     /* Called when the mute setting is queried. A PA_SINK_MESSAGE_GET_MUTE
 180      * message will also be sent. Called from IO thread if PA_SINK_SYNC_VOLUME
 181      * flag is set otherwise from main loop context. If refresh_mute is FALSE
 182      * neither this function is called nor a message is sent.*/
 183     void (*get_mute)(pa_sink *s);               /* dito */
 184
 185     /* Called when the mute setting shall be changed. A PA_SINK_MESSAGE_SET_MUTE
 186      * message will also be sent. Called from IO thread if PA_SINK_SYNC_VOLUME
 187      * flag is set otherwise from main loop context. */
 188     void (*set_mute)(pa_sink *s);               /* dito */
 189
 190     /* Called when a rewind request is issued. Called from IO thread
 191      * context. */
 192     void (*request_rewind)(pa_sink *s);        /* dito */
 193
 194     /* Called when a the requested latency is changed. Called from IO
 195      * thread context. */
 196     void (*update_requested_latency)(pa_sink *s); /* dito */
 197
 198     /* Called whenever the port shall be changed. Called from main
 199      * thread. */
 200     int (*set_port)(pa_sink *s, pa_device_port *port); /* dito */
 201
 202     /* Contains copies of the above data so that the real-time worker
 203      * thread can work without access locking */
 204     struct {
 205         pa_sink_state_t state;
 206         pa_hashmap *inputs;
 207
 208         pa_rtpoll *rtpoll;
 209
 210         pa_cvolume soft_volume;
 211         pa_bool_t soft_muted:1;
 212
 213         /* The requested latency is used for dynamic latency
 214          * sinks. For fixed latency sinks it is always identical to
 215          * the fixed_latency. See below. */
 216         pa_bool_t requested_latency_valid:1;
 217         pa_usec_t requested_latency;
 218
 219         /* The number of bytes streams need to keep around as history to
 220          * be able to satisfy every DMA buffer rewrite */
 221         size_t max_rewind;
 222
 223         /* The number of bytes streams need to keep around to satisfy
 224          * every DMA write request */
 225         size_t max_request;
 226
 227         /* Maximum of what clients requested to rewind in this cycle */
 228         size_t rewind_nbytes;
 229         pa_bool_t rewind_requested;
 230
 231         /* Both dynamic and fixed latencies will be clamped to this
 232          * range. */
 233         pa_usec_t min_latency; /* we won't go below this latency */
 234         pa_usec_t max_latency; /* An upper limit for the latencies */
 235
 236         /* 'Fixed' simply means that the latency is exclusively
 237          * decided on by the sink, and the clients have no influence
 238          * in changing it */
 239         pa_usec_t fixed_latency; /* for sinks with PA_SINK_DYNAMIC_LATENCY this is 0 */
 240
 241         /* Delayed volume change events are queued here. The events
 242          * are stored in expiration order. The one expiring next is in
 243          * the head of the list. */
 244         PA_LLIST_HEAD(pa_sink_volume_change, volume_changes);
 245         pa_sink_volume_change *volume_changes_tail;
 246         /* This value is updated in pa_sink_volume_change_apply() and
 247          * used only by sinks with PA_SINK_SYNC_VOLUME. */
 248         pa_cvolume current_hw_volume;
 249
 250         /* The amount of usec volume up events are delayed and volume
 251          * down events are made earlier. */
 252         uint32_t volume_change_safety_margin;
 253         /* Usec delay added to all volume change events, may be negative. */
 254         int32_t volume_change_extra_delay;
 255     } thread_info;
 256
 257     void *userdata;
 258 };
 259
 260 PA_DECLARE_PUBLIC_CLASS(pa_sink);
 261 #define PA_SINK(s) (pa_sink_cast(s))
 262
 263 typedef enum pa_sink_message {
 264     PA_SINK_MESSAGE_ADD_INPUT,
 265     PA_SINK_MESSAGE_REMOVE_INPUT,
 266     PA_SINK_MESSAGE_GET_VOLUME,
 267     PA_SINK_MESSAGE_SET_VOLUME_SYNCED,
 268     PA_SINK_MESSAGE_SET_VOLUME,
 269     PA_SINK_MESSAGE_SYNC_VOLUMES,
 270     PA_SINK_MESSAGE_GET_MUTE,
 271     PA_SINK_MESSAGE_SET_MUTE,
 272     PA_SINK_MESSAGE_GET_LATENCY,
 273     PA_SINK_MESSAGE_GET_REQUESTED_LATENCY,
 274     PA_SINK_MESSAGE_SET_STATE,
 275     PA_SINK_MESSAGE_START_MOVE,
 276     PA_SINK_MESSAGE_FINISH_MOVE,
 277     PA_SINK_MESSAGE_ATTACH,
 278     PA_SINK_MESSAGE_DETACH,
 279     PA_SINK_MESSAGE_SET_LATENCY_RANGE,
 280     PA_SINK_MESSAGE_GET_LATENCY_RANGE,
 281     PA_SINK_MESSAGE_SET_FIXED_LATENCY,
 282     PA_SINK_MESSAGE_GET_FIXED_LATENCY,
 283     PA_SINK_MESSAGE_GET_MAX_REWIND,
 284     PA_SINK_MESSAGE_GET_MAX_REQUEST,
 285     PA_SINK_MESSAGE_SET_MAX_REWIND,
 286     PA_SINK_MESSAGE_SET_MAX_REQUEST,
 287     PA_SINK_MESSAGE_SET_PORT,
 288     PA_SINK_MESSAGE_UPDATE_VOLUME_AND_MUTE,
 289     PA_SINK_MESSAGE_MAX
 290 } pa_sink_message_t;
 291
 292 typedef struct pa_sink_new_data {
 293     char *name;
 294     pa_proplist *proplist;
 295
 296     const char *driver;
 297     pa_module *module;
 298     pa_card *card;
 299
 300     pa_hashmap *ports;
 301     char *active_port;
 302
 303     pa_sample_spec sample_spec;
 304     pa_channel_map channel_map;
 305     pa_cvolume volume;
 306     pa_bool_t muted :1;
 307
 308     pa_bool_t sample_spec_is_set:1;
 309     pa_bool_t channel_map_is_set:1;
 310     pa_bool_t volume_is_set:1;
 311     pa_bool_t muted_is_set:1;
 312
 313     pa_bool_t namereg_fail:1;
 314
 315     pa_bool_t save_port:1;
 316     pa_bool_t save_volume:1;
 317     pa_bool_t save_muted:1;
 318 } pa_sink_new_data;
 319
 320 pa_sink_new_data* pa_sink_new_data_init(pa_sink_new_data *data);
 321 void pa_sink_new_data_set_name(pa_sink_new_data *data, const char *name);
 322 void pa_sink_new_data_set_sample_spec(pa_sink_new_data *data, const pa_sample_spec *spec);
 323 void pa_sink_new_data_set_channel_map(pa_sink_new_data *data, const pa_channel_map *map);
 324 void pa_sink_new_data_set_volume(pa_sink_new_data *data, const pa_cvolume *volume);
 325 void pa_sink_new_data_set_muted(pa_sink_new_data *data, pa_bool_t mute);
 326 void pa_sink_new_data_set_port(pa_sink_new_data *data, const char *port);
 327 void pa_sink_new_data_done(pa_sink_new_data *data);
 328
 329 /*** To be called exclusively by the sink driver, from main context */
 330
 331 pa_sink* pa_sink_new(
 332         pa_core *core,
 333         pa_sink_new_data *data,
 334         pa_sink_flags_t flags);
 335
 336 void pa_sink_put(pa_sink *s);
 337 void pa_sink_unlink(pa_sink* s);
 338
 339 void pa_sink_set_description(pa_sink *s, const char *description);
 340 void pa_sink_set_asyncmsgq(pa_sink *s, pa_asyncmsgq *q);
 341 void pa_sink_set_rtpoll(pa_sink *s, pa_rtpoll *p);
 342
 343 void pa_sink_set_max_rewind(pa_sink *s, size_t max_rewind);
 344 void pa_sink_set_max_request(pa_sink *s, size_t max_request);
 345 void pa_sink_set_latency_range(pa_sink *s, pa_usec_t min_latency, pa_usec_t max_latency);
 346 void pa_sink_set_fixed_latency(pa_sink *s, pa_usec_t latency);
 347
 348 void pa_sink_detach(pa_sink *s);
 349 void pa_sink_attach(pa_sink *s);
 350
 351 void pa_sink_set_soft_volume(pa_sink *s, const pa_cvolume *volume);
 352 void pa_sink_volume_changed(pa_sink *s, const pa_cvolume *new_volume);
 353 void pa_sink_mute_changed(pa_sink *s, pa_bool_t new_muted);
 354
 355 void pa_sink_update_flags(pa_sink *s, pa_sink_flags_t mask, pa_sink_flags_t value);
 356
 357 pa_bool_t pa_device_init_description(pa_proplist *p);
 358 pa_bool_t pa_device_init_icon(pa_proplist *p, pa_bool_t is_sink);
 359 pa_bool_t pa_device_init_intended_roles(pa_proplist *p);
 360 unsigned pa_device_init_priority(pa_proplist *p);
 361
 362 /**** May be called by everyone, from main context */
 363
 364 /* The returned value is supposed to be in the time domain of the sound card! */
 365 pa_usec_t pa_sink_get_latency(pa_sink *s);
 366 pa_usec_t pa_sink_get_requested_latency(pa_sink *s);
 367 void pa_sink_get_latency_range(pa_sink *s, pa_usec_t *min_latency, pa_usec_t *max_latency);
 368 pa_usec_t pa_sink_get_fixed_latency(pa_sink *s);
 369
 370 size_t pa_sink_get_max_rewind(pa_sink *s);
 371 size_t pa_sink_get_max_request(pa_sink *s);
 372
 373 int pa_sink_update_status(pa_sink*s);
 374 int pa_sink_suspend(pa_sink *s, pa_bool_t suspend, pa_suspend_cause_t cause);
 375 int pa_sink_suspend_all(pa_core *c, pa_bool_t suspend, pa_suspend_cause_t cause);
 376
 377 void pa_sink_set_volume(pa_sink *sink, const pa_cvolume *volume, pa_bool_t sendmsg, pa_bool_t save);
 378 const pa_cvolume *pa_sink_get_volume(pa_sink *sink, pa_bool_t force_refresh);
 379
 380 void pa_sink_set_mute(pa_sink *sink, pa_bool_t mute, pa_bool_t save);
 381 pa_bool_t pa_sink_get_mute(pa_sink *sink, pa_bool_t force_refresh);
 382
 383 pa_bool_t pa_sink_update_proplist(pa_sink *s, pa_update_mode_t mode, pa_proplist *p);
 384
 385 int pa_sink_set_port(pa_sink *s, const char *name, pa_bool_t save);
 386
 387 unsigned pa_sink_linked_by(pa_sink *s); /* Number of connected streams */
 388 unsigned pa_sink_used_by(pa_sink *s); /* Number of connected streams which are not corked */
 389 unsigned pa_sink_check_suspend(pa_sink *s); /* Returns how many streams are active that don't allow suspensions */
 390 #define pa_sink_get_state(s) ((s)->state)
 391
 392 /* Moves all inputs away, and stores them in pa_queue */
 393 pa_queue *pa_sink_move_all_start(pa_sink *s, pa_queue *q);
 394 void pa_sink_move_all_finish(pa_sink *s, pa_queue *q, pa_bool_t save);
 395 void pa_sink_move_all_fail(pa_queue *q);
 396
 397 /*** To be called exclusively by the sink driver, from IO context */
 398
 399 void pa_sink_render(pa_sink*s, size_t length, pa_memchunk *result);
 400 void pa_sink_render_full(pa_sink *s, size_t length, pa_memchunk *result);
 401 void pa_sink_render_into(pa_sink*s, pa_memchunk *target);
 402 void pa_sink_render_into_full(pa_sink *s, pa_memchunk *target);
 403
 404 void pa_sink_process_rewind(pa_sink *s, size_t nbytes);
 405
 406 int pa_sink_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offset, pa_memchunk *chunk);
 407
 408 void pa_sink_attach_within_thread(pa_sink *s);
 409 void pa_sink_detach_within_thread(pa_sink *s);
 410
 411 pa_usec_t pa_sink_get_requested_latency_within_thread(pa_sink *s);
 412
 413 void pa_sink_set_max_rewind_within_thread(pa_sink *s, size_t max_rewind);
 414 void pa_sink_set_max_request_within_thread(pa_sink *s, size_t max_request);
 415
 416 void pa_sink_set_latency_range_within_thread(pa_sink *s, pa_usec_t min_latency, pa_usec_t max_latency);
 417 void pa_sink_set_fixed_latency_within_thread(pa_sink *s, pa_usec_t latency);
 418
 419 void pa_sink_update_volume_and_mute(pa_sink *s);
 420
 421 pa_bool_t pa_sink_volume_change_apply(pa_sink *s, pa_usec_t *usec_to_next);
 422
 423 /*** To be called exclusively by sink input drivers, from IO context */
 424
 425 void pa_sink_request_rewind(pa_sink*s, size_t nbytes);
 426
 427 void pa_sink_invalidate_requested_latency(pa_sink *s, pa_bool_t dynamic);
 428
 429 pa_usec_t pa_sink_get_latency_within_thread(pa_sink *s);
 430
 431 pa_device_port *pa_device_port_new(const char *name, const char *description, size_t extra);
 432 void pa_device_port_free(pa_device_port *p);
 433
 434 /* Verify that we called in IO context (aka 'thread context), or that
 435  * the sink is not yet set up, i.e. the thread not set up yet. See
 436  * pa_assert_io_context() in thread-mq.h for more information. */
 437 #define pa_sink_assert_io_context(s) \
 438     pa_assert(pa_thread_mq_get() || !PA_SINK_IS_LINKED((s)->state))
 439
 440 #endif