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 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
  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/source.h>
  37 #include <pulsecore/module.h>
  38 #include <pulsecore/refcnt.h>
  39 #include <pulsecore/msgobject.h>
  40 #include <pulsecore/rtpoll.h>
  41
  42 #define PA_MAX_INPUTS_PER_SINK 32
  43
  44 typedef enum pa_sink_state {
  45     PA_SINK_INIT,
  46     PA_SINK_RUNNING,
  47     PA_SINK_SUSPENDED,
  48     PA_SINK_IDLE,
  49     PA_SINK_UNLINKED
  50 } pa_sink_state_t;
  51
  52 static inline pa_bool_t PA_SINK_IS_OPENED(pa_sink_state_t x) {
  53     return x == PA_SINK_RUNNING || x == PA_SINK_IDLE;
  54 }
  55
  56 static inline pa_bool_t PA_SINK_IS_LINKED(pa_sink_state_t x) {
  57     return x == PA_SINK_RUNNING || x == PA_SINK_IDLE || x == PA_SINK_SUSPENDED;
  58 }
  59
  60 struct pa_sink {
  61     pa_msgobject parent;
  62
  63     uint32_t index;
  64     pa_core *core;
  65     pa_sink_state_t state;
  66     pa_sink_flags_t flags;
  67
  68     char *name;
  69     char *driver;                           /* may be NULL */
  70     pa_proplist *proplist;
  71
  72     pa_module *module;                      /* may be NULL */
  73
  74     pa_sample_spec sample_spec;
  75     pa_channel_map channel_map;
  76
  77     pa_idxset *inputs;
  78     unsigned n_corked;
  79     pa_source *monitor_source;
  80
  81     pa_cvolume volume;
  82     pa_bool_t muted;
  83
  84     pa_bool_t refresh_volume:1;
  85     pa_bool_t refresh_muted:1;
  86
  87     pa_asyncmsgq *asyncmsgq;
  88     pa_rtpoll *rtpoll;
  89
  90     pa_memchunk silence;
  91
  92     /* Called when the main loop requests a state change. Called from
  93      * main loop context. If returns -1 the state change will be
  94      * inhibited */
  95     int (*set_state)(pa_sink *s, pa_sink_state_t state); /* may be NULL */
  96
  97     /* Callled when the volume is queried. Called from main loop
  98      * context. If this is NULL a PA_SINK_MESSAGE_GET_VOLUME message
  99      * will be sent to the IO thread instead. If refresh_volume is
 100      * FALSE neither this function is called nor a message is sent. */
 101     int (*get_volume)(pa_sink *s);             /* may be NULL */
 102
 103     /* Called when the volume shall be changed. Called from main loop
 104      * context. If this is NULL a PA_SINK_MESSAGE_SET_VOLUME message
 105      * will be sent to the IO thread instead. */
 106     int (*set_volume)(pa_sink *s);             /* dito */
 107
 108     /* Called when the mute setting is queried. Called from main loop
 109      * context. If this is NULL a PA_SINK_MESSAGE_GET_MUTE message
 110      * will be sent to the IO thread instead. If refresh_mute is
 111      * FALSE neither this function is called nor a message is sent.*/
 112     int (*get_mute)(pa_sink *s);               /* dito */
 113
 114     /* Called when the mute setting shall be changed. Called from main
 115      * loop context. If this is NULL a PA_SINK_MESSAGE_SET_MUTE
 116      * message will be sent to the IO thread instead. */
 117     int (*set_mute)(pa_sink *s);               /* dito */
 118
 119     /* Called when a rewind request is issued. Called from IO thread
 120      * context. */
 121     void (*request_rewind)(pa_sink *s);        /* dito */
 122
 123     /* Called when a the requested latency is changed. Called from IO
 124      * thread context. */
 125     void (*update_requested_latency)(pa_sink *s); /* dito */
 126
 127     /* Contains copies of the above data so that the real-time worker
 128      * thread can work without access locking */
 129     struct {
 130         pa_sink_state_t state;
 131         pa_hashmap *inputs;
 132         pa_cvolume soft_volume;
 133         pa_bool_t soft_muted:1;
 134
 135         pa_bool_t requested_latency_valid:1;
 136         pa_usec_t requested_latency;
 137
 138         /* The number of bytes streams need to keep around as history to
 139          * be able to satisfy every DMA buffer rewrite */
 140         size_t max_rewind;
 141
 142         /* The number of bytes streams need to keep around to satisfy
 143          * every DMA write request */
 144         size_t max_request;
 145
 146         /* Maximum of what clients requested to rewind in this cycle */
 147         size_t rewind_nbytes;
 148         pa_bool_t rewind_requested;
 149
 150         pa_usec_t min_latency; /* we won't go below this latency */
 151         pa_usec_t max_latency; /* An upper limit for the latencies */
 152     } thread_info;
 153
 154     void *userdata;
 155 };
 156
 157 PA_DECLARE_CLASS(pa_sink);
 158 #define PA_SINK(s) (pa_sink_cast(s))
 159
 160 typedef enum pa_sink_message {
 161     PA_SINK_MESSAGE_ADD_INPUT,
 162     PA_SINK_MESSAGE_REMOVE_INPUT,
 163     PA_SINK_MESSAGE_GET_VOLUME,
 164     PA_SINK_MESSAGE_SET_VOLUME,
 165     PA_SINK_MESSAGE_GET_MUTE,
 166     PA_SINK_MESSAGE_SET_MUTE,
 167     PA_SINK_MESSAGE_GET_LATENCY,
 168     PA_SINK_MESSAGE_GET_REQUESTED_LATENCY,
 169     PA_SINK_MESSAGE_SET_STATE,
 170     PA_SINK_MESSAGE_START_MOVE,
 171     PA_SINK_MESSAGE_FINISH_MOVE,
 172     PA_SINK_MESSAGE_ATTACH,
 173     PA_SINK_MESSAGE_DETACH,
 174     PA_SINK_MESSAGE_SET_LATENCY_RANGE,
 175     PA_SINK_MESSAGE_GET_LATENCY_RANGE,
 176     PA_SINK_MESSAGE_GET_MAX_REWIND,
 177     PA_SINK_MESSAGE_GET_MAX_REQUEST,
 178     PA_SINK_MESSAGE_MAX
 179 } pa_sink_message_t;
 180
 181 typedef struct pa_sink_new_data {
 182     char *name;
 183     pa_proplist *proplist;
 184
 185     const char *driver;
 186     pa_module *module;
 187
 188     pa_sample_spec sample_spec;
 189     pa_channel_map channel_map;
 190     pa_cvolume volume;
 191     pa_bool_t muted :1;
 192
 193     pa_bool_t sample_spec_is_set:1;
 194     pa_bool_t channel_map_is_set:1;
 195     pa_bool_t volume_is_set:1;
 196     pa_bool_t muted_is_set:1;
 197
 198     pa_bool_t namereg_fail:1;
 199 } pa_sink_new_data;
 200
 201 pa_sink_new_data* pa_sink_new_data_init(pa_sink_new_data *data);
 202 void pa_sink_new_data_set_name(pa_sink_new_data *data, const char *name);
 203 void pa_sink_new_data_set_sample_spec(pa_sink_new_data *data, const pa_sample_spec *spec);
 204 void pa_sink_new_data_set_channel_map(pa_sink_new_data *data, const pa_channel_map *map);
 205 void pa_sink_new_data_set_volume(pa_sink_new_data *data, const pa_cvolume *volume);
 206 void pa_sink_new_data_set_muted(pa_sink_new_data *data, pa_bool_t mute);
 207 void pa_sink_new_data_done(pa_sink_new_data *data);
 208
 209 typedef struct pa_sink_set_volume_data {
 210   pa_sink *sink;
 211   pa_cvolume volume;
 212 } pa_sink_set_volume_data;
 213
 214 /* To be called exclusively by the sink driver, from main context */
 215
 216 pa_sink* pa_sink_new(
 217         pa_core *core,
 218         pa_sink_new_data *data,
 219         pa_sink_flags_t flags);
 220
 221 void pa_sink_put(pa_sink *s);
 222 void pa_sink_unlink(pa_sink* s);
 223
 224 void pa_sink_set_description(pa_sink *s, const char *description);
 225 void pa_sink_set_asyncmsgq(pa_sink *s, pa_asyncmsgq *q);
 226 void pa_sink_set_rtpoll(pa_sink *s, pa_rtpoll *p);
 227
 228 void pa_sink_set_latency_range(pa_sink *s, pa_usec_t min_latency, pa_usec_t max_latency);
 229
 230 void pa_sink_detach(pa_sink *s);
 231 void pa_sink_attach(pa_sink *s);
 232
 233 /* May be called by everyone, from main context */
 234
 235 /* The returned value is supposed to be in the time domain of the sound card! */
 236 pa_usec_t pa_sink_get_latency(pa_sink *s);
 237 pa_usec_t pa_sink_get_requested_latency(pa_sink *s);
 238 void pa_sink_get_latency_range(pa_sink *s, pa_usec_t *min_latency, pa_usec_t *max_latency);
 239
 240 size_t pa_sink_get_max_rewind(pa_sink *s);
 241 size_t pa_sink_get_max_request(pa_sink *s);
 242
 243 int pa_sink_update_status(pa_sink*s);
 244 int pa_sink_suspend(pa_sink *s, pa_bool_t suspend);
 245 int pa_sink_suspend_all(pa_core *c, pa_bool_t suspend);
 246
 247 void pa_sink_set_volume(pa_sink *sink, const pa_cvolume *volume);
 248 void pa_sink_set_soft_volume(pa_sink *s, const pa_cvolume *volume);
 249 const pa_cvolume *pa_sink_get_volume(pa_sink *sink, pa_bool_t force_refresh);
 250 void pa_sink_set_mute(pa_sink *sink, pa_bool_t mute);
 251 pa_bool_t pa_sink_get_mute(pa_sink *sink, pa_bool_t force_refres);
 252
 253 unsigned pa_sink_linked_by(pa_sink *s); /* Number of connected streams */
 254 unsigned pa_sink_used_by(pa_sink *s); /* Number of connected streams which are not corked */
 255 unsigned pa_sink_check_suspend(pa_sink *s); /* Returns how many streams are active that don't allow suspensions */
 256 #define pa_sink_get_state(s) ((s)->state)
 257
 258 /* To be called exclusively by the sink driver, from IO context */
 259
 260 void pa_sink_render(pa_sink*s, size_t length, pa_memchunk *result);
 261 void pa_sink_render_full(pa_sink *s, size_t length, pa_memchunk *result);
 262 void pa_sink_render_into(pa_sink*s, pa_memchunk *target);
 263 void pa_sink_render_into_full(pa_sink *s, pa_memchunk *target);
 264
 265 void pa_sink_process_rewind(pa_sink *s, size_t nbytes);
 266
 267 int pa_sink_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offset, pa_memchunk *chunk);
 268
 269 void pa_sink_attach_within_thread(pa_sink *s);
 270 void pa_sink_detach_within_thread(pa_sink *s);
 271
 272 pa_usec_t pa_sink_get_requested_latency_within_thread(pa_sink *s);
 273
 274 void pa_sink_set_max_rewind(pa_sink *s, size_t max_rewind);
 275 void pa_sink_set_max_request(pa_sink *s, size_t max_request);
 276
 277 void pa_sink_update_latency_range(pa_sink *s, pa_usec_t min_latency, pa_usec_t max_latency);
 278
 279 /* To be called exclusively by sink input drivers, from IO context */
 280
 281 void pa_sink_request_rewind(pa_sink*s, size_t nbytes);
 282
 283 void pa_sink_invalidate_requested_latency(pa_sink *s);
 284
 285 #endif