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

   1 #ifndef foopulsesinkinputhfoo
   2 #define foopulsesinkinputhfoo
   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 <inttypes.h>
  27
  28 typedef struct pa_sink_input pa_sink_input;
  29
  30 #include <pulse/sample.h>
  31 #include <pulse/format.h>
  32 #include <pulsecore/hook-list.h>
  33 #include <pulsecore/memblockq.h>
  34 #include <pulsecore/resampler.h>
  35 #include <pulsecore/module.h>
  36 #include <pulsecore/client.h>
  37 #include <pulsecore/sink.h>
  38 #include <pulsecore/core.h>
  39
  40 typedef enum pa_sink_input_state {
  41     PA_SINK_INPUT_INIT,         /*< The stream is not active yet, because pa_sink_input_put() has not been called yet */
  42     PA_SINK_INPUT_DRAINED,      /*< The stream stopped playing because there was no data to play */
  43     PA_SINK_INPUT_RUNNING,      /*< The stream is alive and kicking */
  44     PA_SINK_INPUT_CORKED,       /*< The stream was corked on user request */
  45     PA_SINK_INPUT_UNLINKED      /*< The stream is dead */
  46     /* FIXME: we need a state for MOVING here */
  47 } pa_sink_input_state_t;
  48
  49 static inline pa_bool_t PA_SINK_INPUT_IS_LINKED(pa_sink_input_state_t x) {
  50     return x == PA_SINK_INPUT_DRAINED || x == PA_SINK_INPUT_RUNNING || x == PA_SINK_INPUT_CORKED;
  51 }
  52
  53 typedef enum pa_sink_input_flags {
  54     PA_SINK_INPUT_VARIABLE_RATE = 1,
  55     PA_SINK_INPUT_DONT_MOVE = 2,
  56     PA_SINK_INPUT_START_CORKED = 4,
  57     PA_SINK_INPUT_NO_REMAP = 8,
  58     PA_SINK_INPUT_NO_REMIX = 16,
  59     PA_SINK_INPUT_FIX_FORMAT = 32,
  60     PA_SINK_INPUT_FIX_RATE = 64,
  61     PA_SINK_INPUT_FIX_CHANNELS = 128,
  62     PA_SINK_INPUT_DONT_INHIBIT_AUTO_SUSPEND = 256,
  63     PA_SINK_INPUT_NO_CREATE_ON_SUSPEND = 512,
  64     PA_SINK_INPUT_KILL_ON_SUSPEND = 1024,
  65     PA_SINK_INPUT_PASSTHROUGH = 2048
  66 } pa_sink_input_flags_t;
  67
  68 struct pa_sink_input {
  69     pa_msgobject parent;
  70
  71     uint32_t index;
  72     pa_core *core;
  73
  74     /* Please note that this state should only be read with
  75      * pa_sink_input_get_state(). That function will transparently
  76      * merge the thread_info.drained value in. */
  77     pa_sink_input_state_t state;
  78     pa_sink_input_flags_t flags;
  79
  80     char *driver;                       /* may be NULL */
  81     pa_proplist *proplist;
  82
  83     pa_module *module;                  /* may be NULL */
  84     pa_client *client;                  /* may be NULL */
  85
  86     pa_sink *sink;                      /* NULL while we are being moved */
  87     pa_sink *origin_sink;               /* only set by filter sinks */
  88
  89     /* A sink input may be connected to multiple source outputs
  90      * directly, so that they don't get mixed data of the entire
  91      * source. */
  92     pa_idxset *direct_outputs;
  93
  94     pa_sample_spec sample_spec;
  95     pa_channel_map channel_map;
  96     pa_format_info *format;
  97
  98     pa_sink_input *sync_prev, *sync_next;
  99
 100     /* Also see http://pulseaudio.org/wiki/InternalVolumes */
 101     pa_cvolume volume;             /* The volume clients are informed about */
 102     pa_cvolume reference_ratio;    /* The ratio of the stream's volume to the sink's reference volume */
 103     pa_cvolume real_ratio;         /* The ratio of the stream's volume to the sink's real volume */
 104     pa_cvolume volume_factor;      /* An internally used volume factor that can be used by modules to apply effects and suchlike without having that visible to the outside */
 105     pa_cvolume soft_volume;        /* The internal software volume we apply to all PCM data while it passes through. Usually calculated as real_ratio * volume_factor */
 106
 107     pa_cvolume volume_factor_sink; /* A second volume factor in format of the sink this stream is connected to */
 108
 109     pa_bool_t volume_writable:1;
 110
 111     pa_bool_t muted:1;
 112
 113     /* if TRUE then the sink we are connected to and/or the volume
 114      * set is worth remembering, i.e. was explicitly chosen by the
 115      * user and not automatically. module-stream-restore looks for
 116      * this.*/
 117     pa_bool_t save_sink:1, save_volume:1, save_muted:1;
 118
 119     pa_resample_method_t requested_resample_method, actual_resample_method;
 120
 121     /* Returns the chunk of audio data and drops it from the
 122      * queue. Returns -1 on failure. Called from IO thread context. If
 123      * data needs to be generated from scratch then please in the
 124      * specified length request_nbytes. This is an optimization
 125      * only. If less data is available, it's fine to return a smaller
 126      * block. If more data is already ready, it is better to return
 127      * the full block. */
 128     int (*pop) (pa_sink_input *i, size_t request_nbytes, pa_memchunk *chunk); /* may NOT be NULL */
 129
 130     /* Rewind the queue by the specified number of bytes. Called just
 131      * before peek() if it is called at all. Only called if the sink
 132      * input driver ever plans to call
 133      * pa_sink_input_request_rewind(). Called from IO context. */
 134     void (*process_rewind) (pa_sink_input *i, size_t nbytes);     /* may NOT be NULL */
 135
 136     /* Called whenever the maximum rewindable size of the sink
 137      * changes. Called from IO context. */
 138     void (*update_max_rewind) (pa_sink_input *i, size_t nbytes); /* may be NULL */
 139
 140     /* Called whenever the maximum request size of the sink
 141      * changes. Called from IO context. */
 142     void (*update_max_request) (pa_sink_input *i, size_t nbytes); /* may be NULL */
 143
 144     /* Called whenever the configured latency of the sink
 145      * changes. Called from IO context. */
 146     void (*update_sink_requested_latency) (pa_sink_input *i); /* may be NULL */
 147
 148     /* Called whenver the latency range of the sink changes. Called
 149      * from IO context. */
 150     void (*update_sink_latency_range) (pa_sink_input *i); /* may be NULL */
 151
 152     /* Called whenver the fixed latency of the sink changes, if there
 153      * is one. Called from IO context. */
 154     void (*update_sink_fixed_latency) (pa_sink_input *i); /* may be NULL */
 155
 156     /* If non-NULL this function is called when the input is first
 157      * connected to a sink or when the rtpoll/asyncmsgq fields
 158      * change. You usually don't need to implement this function
 159      * unless you rewrite a sink that is piggy-backed onto
 160      * another. Called from IO thread context */
 161     void (*attach) (pa_sink_input *i);           /* may be NULL */
 162
 163     /* If non-NULL this function is called when the output is
 164      * disconnected from its sink. Called from IO thread context */
 165     void (*detach) (pa_sink_input *i);           /* may be NULL */
 166
 167     /* If non-NULL called whenever the sink this input is attached
 168      * to suspends or resumes. Called from main context */
 169     void (*suspend) (pa_sink_input *i, pa_bool_t b);   /* may be NULL */
 170
 171     /* If non-NULL called whenever the sink this input is attached
 172      * to suspends or resumes. Called from IO context */
 173     void (*suspend_within_thread) (pa_sink_input *i, pa_bool_t b);   /* may be NULL */
 174
 175     /* If non-NULL called whenever the sink input is moved to a new
 176      * sink. Called from main context after the sink input has been
 177      * detached from the old sink and before it has been attached to
 178      * the new sink. If dest is NULL the move was executed in two
 179      * phases and the second one failed; the stream will be destroyed
 180      * after this call. */
 181     void (*moving) (pa_sink_input *i, pa_sink *dest);   /* may be NULL */
 182
 183     /* Supposed to unlink and destroy this stream. Called from main
 184      * context. */
 185     void (*kill) (pa_sink_input *i);             /* may NOT be NULL */
 186
 187     /* Return the current latency (i.e. length of bufferd audio) of
 188     this stream. Called from main context. This is added to what the
 189     PA_SINK_INPUT_MESSAGE_GET_LATENCY message sent to the IO thread
 190     returns */
 191     pa_usec_t (*get_latency) (pa_sink_input *i); /* may be NULL */
 192
 193     /* If non-NULL this function is called from thread context if the
 194      * state changes. The old state is found in thread_info.state.  */
 195     void (*state_change) (pa_sink_input *i, pa_sink_input_state_t state); /* may be NULL */
 196
 197     /* If non-NULL this function is called before this sink input is
 198      * move to a sink and if it returns FALSE the move will not
 199      * be allowed */
 200     pa_bool_t (*may_move_to) (pa_sink_input *i, pa_sink *s); /* may be NULL */
 201
 202     /* If non-NULL this function is used to dispatch asynchronous
 203      * control events. Called from main context. */
 204     void (*send_event)(pa_sink_input *i, const char *event, pa_proplist* data); /* may be NULL */
 205
 206     /* If non-NULL this function is called whenever the sink input
 207      * volume changes. Called from main context */
 208     void (*volume_changed)(pa_sink_input *i); /* may be NULL */
 209
 210     /* If non-NULL this function is called whenever the sink input
 211      * mute status changes. Called from main context */
 212     void (*mute_changed)(pa_sink_input *i); /* may be NULL */
 213
 214     struct {
 215         pa_sink_input_state_t state;
 216         pa_atomic_t drained;
 217
 218         pa_cvolume soft_volume;
 219         pa_bool_t muted:1;
 220
 221         pa_bool_t attached:1; /* True only between ->attach() and ->detach() calls */
 222
 223         /* rewrite_nbytes: 0: rewrite nothing, (size_t) -1: rewrite everything, otherwise how many bytes to rewrite */
 224         pa_bool_t rewrite_flush:1, dont_rewind_render:1;
 225         size_t rewrite_nbytes;
 226         uint64_t underrun_for, playing_for;
 227
 228         pa_sample_spec sample_spec;
 229
 230         pa_resampler *resampler;                     /* may be NULL */
 231
 232         /* We maintain a history of resampled audio data here. */
 233         pa_memblockq *render_memblockq;
 234
 235         pa_sink_input *sync_prev, *sync_next;
 236
 237         /* The requested latency for the sink */
 238         pa_usec_t requested_sink_latency;
 239
 240         pa_hashmap *direct_outputs;
 241     } thread_info;
 242
 243     void *userdata;
 244 };
 245
 246 PA_DECLARE_PUBLIC_CLASS(pa_sink_input);
 247 #define PA_SINK_INPUT(o) pa_sink_input_cast(o)
 248
 249 enum {
 250     PA_SINK_INPUT_MESSAGE_SET_SOFT_VOLUME,
 251     PA_SINK_INPUT_MESSAGE_SET_SOFT_MUTE,
 252     PA_SINK_INPUT_MESSAGE_GET_LATENCY,
 253     PA_SINK_INPUT_MESSAGE_SET_RATE,
 254     PA_SINK_INPUT_MESSAGE_SET_STATE,
 255     PA_SINK_INPUT_MESSAGE_SET_REQUESTED_LATENCY,
 256     PA_SINK_INPUT_MESSAGE_GET_REQUESTED_LATENCY,
 257     PA_SINK_INPUT_MESSAGE_MAX
 258 };
 259
 260 typedef struct pa_sink_input_send_event_hook_data {
 261     pa_sink_input *sink_input;
 262     const char *event;
 263     pa_proplist *data;
 264 } pa_sink_input_send_event_hook_data;
 265
 266 typedef struct pa_sink_input_new_data {
 267     pa_sink_input_flags_t flags;
 268
 269     pa_proplist *proplist;
 270
 271     const char *driver;
 272     pa_module *module;
 273     pa_client *client;
 274
 275     pa_sink *sink;
 276     pa_sink *origin_sink;
 277
 278     pa_resample_method_t resample_method;
 279
 280     pa_sink_input *sync_base;
 281
 282     pa_sample_spec sample_spec;
 283     pa_channel_map channel_map;
 284     pa_format_info *format;
 285     pa_idxset *req_formats;
 286     pa_idxset *nego_formats;
 287
 288     pa_cvolume volume, volume_factor, volume_factor_sink;
 289     pa_bool_t muted:1;
 290
 291     pa_bool_t sample_spec_is_set:1;
 292     pa_bool_t channel_map_is_set:1;
 293
 294     pa_bool_t volume_is_set:1, volume_factor_is_set:1, volume_factor_sink_is_set:1;
 295     pa_bool_t muted_is_set:1;
 296
 297     pa_bool_t volume_is_absolute:1;
 298
 299     pa_bool_t volume_writable:1;
 300
 301     pa_bool_t save_sink:1, save_volume:1, save_muted:1;
 302 } pa_sink_input_new_data;
 303
 304 pa_sink_input_new_data* pa_sink_input_new_data_init(pa_sink_input_new_data *data);
 305 void pa_sink_input_new_data_set_sample_spec(pa_sink_input_new_data *data, const pa_sample_spec *spec);
 306 void pa_sink_input_new_data_set_channel_map(pa_sink_input_new_data *data, const pa_channel_map *map);
 307 pa_bool_t pa_sink_input_new_data_is_passthrough(pa_sink_input_new_data *data);
 308 void pa_sink_input_new_data_set_volume(pa_sink_input_new_data *data, const pa_cvolume *volume);
 309 void pa_sink_input_new_data_apply_volume_factor(pa_sink_input_new_data *data, const pa_cvolume *volume_factor);
 310 void pa_sink_input_new_data_apply_volume_factor_sink(pa_sink_input_new_data *data, const pa_cvolume *volume_factor);
 311 void pa_sink_input_new_data_set_muted(pa_sink_input_new_data *data, pa_bool_t mute);
 312 pa_bool_t pa_sink_input_new_data_set_sink(pa_sink_input_new_data *data, pa_sink *s, pa_bool_t save);
 313 pa_bool_t pa_sink_input_new_data_set_formats(pa_sink_input_new_data *data, pa_idxset *formats);
 314 void pa_sink_input_new_data_done(pa_sink_input_new_data *data);
 315
 316 /* To be called by the implementing module only */
 317
 318 int pa_sink_input_new(
 319         pa_sink_input **i,
 320         pa_core *core,
 321         pa_sink_input_new_data *data);
 322
 323 void pa_sink_input_put(pa_sink_input *i);
 324 void pa_sink_input_unlink(pa_sink_input* i);
 325
 326 void pa_sink_input_set_name(pa_sink_input *i, const char *name);
 327
 328 pa_usec_t pa_sink_input_set_requested_latency(pa_sink_input *i, pa_usec_t usec);
 329
 330 /* Request that the specified number of bytes already written out to
 331 the hw device is rewritten, if possible.  Please note that this is
 332 only a kind request. The sink driver may not be able to fulfill it
 333 fully -- or at all. If the request for a rewrite was successful, the
 334 sink driver will call ->rewind() and pass the number of bytes that
 335 could be rewound in the HW device. This functionality is required for
 336 implementing the "zero latency" write-through functionality. */
 337 void pa_sink_input_request_rewind(pa_sink_input *i, size_t nbytes, pa_bool_t rewrite, pa_bool_t flush, pa_bool_t dont_rewind_render);
 338
 339 void pa_sink_input_cork(pa_sink_input *i, pa_bool_t b);
 340
 341 int pa_sink_input_set_rate(pa_sink_input *i, uint32_t rate);
 342
 343 /* This returns the sink's fields converted into out sample type */
 344 size_t pa_sink_input_get_max_rewind(pa_sink_input *i);
 345 size_t pa_sink_input_get_max_request(pa_sink_input *i);
 346
 347 /* Callable by everyone from main thread*/
 348
 349 /* External code may request disconnection with this function */
 350 void pa_sink_input_kill(pa_sink_input*i);
 351
 352 pa_usec_t pa_sink_input_get_latency(pa_sink_input *i, pa_usec_t *sink_latency);
 353
 354 pa_bool_t pa_sink_input_is_passthrough(pa_sink_input *i);
 355 pa_bool_t pa_sink_input_is_volume_readable(pa_sink_input *i);
 356 void pa_sink_input_set_volume(pa_sink_input *i, const pa_cvolume *volume, pa_bool_t save, pa_bool_t absolute);
 357 pa_cvolume *pa_sink_input_get_volume(pa_sink_input *i, pa_cvolume *volume, pa_bool_t absolute);
 358
 359 void pa_sink_input_set_mute(pa_sink_input *i, pa_bool_t mute, pa_bool_t save);
 360 pa_bool_t pa_sink_input_get_mute(pa_sink_input *i);
 361
 362 void pa_sink_input_update_proplist(pa_sink_input *i, pa_update_mode_t mode, pa_proplist *p);
 363
 364 pa_resample_method_t pa_sink_input_get_resample_method(pa_sink_input *i);
 365
 366 void pa_sink_input_send_event(pa_sink_input *i, const char *name, pa_proplist *data);
 367
 368 int pa_sink_input_move_to(pa_sink_input *i, pa_sink *dest, pa_bool_t save);
 369 pa_bool_t pa_sink_input_may_move(pa_sink_input *i); /* may this sink input move at all? */
 370 pa_bool_t pa_sink_input_may_move_to(pa_sink_input *i, pa_sink *dest); /* may this sink input move to this sink? */
 371
 372 /* The same as pa_sink_input_move_to() but in two seperate steps,
 373  * first the detaching from the old sink, then the attaching to the
 374  * new sink */
 375 int pa_sink_input_start_move(pa_sink_input *i);
 376 int pa_sink_input_finish_move(pa_sink_input *i, pa_sink *dest, pa_bool_t save);
 377 void pa_sink_input_fail_move(pa_sink_input *i);
 378
 379 pa_sink_input_state_t pa_sink_input_get_state(pa_sink_input *i);
 380
 381 pa_usec_t pa_sink_input_get_requested_latency(pa_sink_input *i);
 382
 383 /* To be used exclusively by the sink driver IO thread */
 384
 385 void pa_sink_input_peek(pa_sink_input *i, size_t length, pa_memchunk *chunk, pa_cvolume *volume);
 386 void pa_sink_input_drop(pa_sink_input *i, size_t length);
 387 void pa_sink_input_process_rewind(pa_sink_input *i, size_t nbytes /* in the sink's sample spec */);
 388 void pa_sink_input_update_max_rewind(pa_sink_input *i, size_t nbytes  /* in the sink's sample spec */);
 389 void pa_sink_input_update_max_request(pa_sink_input *i, size_t nbytes  /* in the sink's sample spec */);
 390
 391 void pa_sink_input_set_state_within_thread(pa_sink_input *i, pa_sink_input_state_t state);
 392
 393 int pa_sink_input_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offset, pa_memchunk *chunk);
 394
 395 pa_usec_t pa_sink_input_set_requested_latency_within_thread(pa_sink_input *i, pa_usec_t usec);
 396
 397 pa_bool_t pa_sink_input_safe_to_remove(pa_sink_input *i);
 398
 399 pa_memchunk* pa_sink_input_get_silence(pa_sink_input *i, pa_memchunk *ret);
 400
 401 #define pa_sink_input_assert_io_context(s) \
 402     pa_assert(pa_thread_mq_get() || !PA_SINK_INPUT_IS_LINKED((s)->state))
 403
 404 #endif