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