1 #ifndef foopulsesinkinputhfoo
2 #define foopulsesinkinputhfoo
5 This file is part of PulseAudio.
7 Copyright 2004-2006 Lennart Poettering
8 Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
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.
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.
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
28 typedef struct pa_sink_input pa_sink_input;
30 #include <pulse/sample.h>
31 #include <pulse/format.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 #include <pulsecore/mix.h>
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;
49 static inline bool 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;
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_START_RAMP_MUTED = 4096,
67 } pa_sink_input_flags_t;
69 struct pa_sink_input {
75 /* Please note that this state should only be read with
76 * pa_sink_input_get_state(). That function will transparently
77 * merge the thread_info.drained value in. */
78 pa_sink_input_state_t state;
79 pa_sink_input_flags_t flags;
81 char *driver; /* may be NULL */
82 pa_proplist *proplist;
84 pa_module *module; /* may be NULL */
85 pa_client *client; /* may be NULL */
87 pa_sink *sink; /* NULL while we are being moved */
88 pa_sink *origin_sink; /* only set by filter sinks */
90 /* A sink input may be connected to multiple source outputs
91 * directly, so that they don't get mixed data of the entire
93 pa_idxset *direct_outputs;
95 pa_sample_spec sample_spec;
96 pa_channel_map channel_map;
97 pa_format_info *format;
99 pa_sink_input *sync_prev, *sync_next;
101 /* Also see http://pulseaudio.org/wiki/InternalVolumes */
102 pa_cvolume volume; /* The volume clients are informed about */
103 pa_cvolume reference_ratio; /* The ratio of the stream's volume to the sink's reference volume */
104 pa_cvolume real_ratio; /* The ratio of the stream's volume to the sink's real volume */
105 /* volume_factor is an internally used "additional volume" that can be used
106 * by modules without having the volume visible to clients. volume_factor
107 * calculated by merging all the individual items in volume_factor_items.
108 * Modules must not modify these variables directly, instead
109 * pa_sink_input_add/remove_volume_factor() have to be used to add and
110 * remove items, or pa_sink_input_new_data_add_volume_factor() during input
112 pa_cvolume volume_factor;
113 pa_hashmap *volume_factor_items;
114 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 */
116 pa_cvolume volume_factor_sink; /* A second volume factor in format of the sink this stream is connected to. */
117 pa_hashmap *volume_factor_sink_items;
119 bool volume_writable:1;
123 /* if true then the sink we are connected to and/or the volume
124 * set is worth remembering, i.e. was explicitly chosen by the
125 * user and not automatically. module-stream-restore looks for
127 bool save_sink:1, save_volume:1, save_muted:1;
129 /* for volume ramps */
130 pa_cvolume_ramp_int ramp;
132 pa_resample_method_t requested_resample_method, actual_resample_method;
134 /* Returns the chunk of audio data and drops it from the
135 * queue. Returns -1 on failure. Called from IO thread context. If
136 * data needs to be generated from scratch then please in the
137 * specified length request_nbytes. This is an optimization
138 * only. If less data is available, it's fine to return a smaller
139 * block. If more data is already ready, it is better to return
141 int (*pop) (pa_sink_input *i, size_t request_nbytes, pa_memchunk *chunk); /* may NOT be NULL */
143 /* This is called when the playback buffer has actually played back
144 all available data. Return true unless there is more data to play back.
145 Called from IO context. */
146 bool (*process_underrun) (pa_sink_input *i);
148 /* Rewind the queue by the specified number of bytes. Called just
149 * before peek() if it is called at all. Only called if the sink
150 * input driver ever plans to call
151 * pa_sink_input_request_rewind(). Called from IO context. */
152 void (*process_rewind) (pa_sink_input *i, size_t nbytes); /* may NOT be NULL */
154 /* Called whenever the maximum rewindable size of the sink
155 * changes. Called from IO context. */
156 void (*update_max_rewind) (pa_sink_input *i, size_t nbytes); /* may be NULL */
158 /* Called whenever the maximum request size of the sink
159 * changes. Called from IO context. */
160 void (*update_max_request) (pa_sink_input *i, size_t nbytes); /* may be NULL */
162 /* Called whenever the configured latency of the sink
163 * changes. Called from IO context. */
164 void (*update_sink_requested_latency) (pa_sink_input *i); /* may be NULL */
166 /* Called whenever the latency range of the sink changes. Called
167 * from IO context. */
168 void (*update_sink_latency_range) (pa_sink_input *i); /* may be NULL */
170 /* Called whenever the fixed latency of the sink changes, if there
171 * is one. Called from IO context. */
172 void (*update_sink_fixed_latency) (pa_sink_input *i); /* may be NULL */
174 /* If non-NULL this function is called when the input is first
175 * connected to a sink or when the rtpoll/asyncmsgq fields
176 * change. You usually don't need to implement this function
177 * unless you rewrite a sink that is piggy-backed onto
178 * another. Called from IO thread context */
179 void (*attach) (pa_sink_input *i); /* may be NULL */
181 /* If non-NULL this function is called when the output is
182 * disconnected from its sink. Called from IO thread context */
183 void (*detach) (pa_sink_input *i); /* may be NULL */
185 /* If non-NULL called whenever the sink this input is attached
186 * to suspends or resumes. Called from main context */
187 void (*suspend) (pa_sink_input *i, bool b); /* may be NULL */
189 /* If non-NULL called whenever the sink this input is attached
190 * to suspends or resumes. Called from IO context */
191 void (*suspend_within_thread) (pa_sink_input *i, bool b); /* may be NULL */
193 /* If non-NULL called whenever the sink input is moved to a new
194 * sink. Called from main context after the sink input has been
195 * detached from the old sink and before it has been attached to
196 * the new sink. If dest is NULL the move was executed in two
197 * phases and the second one failed; the stream will be destroyed
198 * after this call. */
199 void (*moving) (pa_sink_input *i, pa_sink *dest); /* may be NULL */
201 /* Supposed to unlink and destroy this stream. Called from main
203 void (*kill) (pa_sink_input *i); /* may NOT be NULL */
205 /* Return the current latency (i.e. length of buffered audio) of
206 this stream. Called from main context. This is added to what the
207 PA_SINK_INPUT_MESSAGE_GET_LATENCY message sent to the IO thread
209 pa_usec_t (*get_latency) (pa_sink_input *i); /* may be NULL */
211 /* If non-NULL this function is called from thread context if the
212 * state changes. The old state is found in thread_info.state. */
213 void (*state_change) (pa_sink_input *i, pa_sink_input_state_t state); /* may be NULL */
215 /* If non-NULL this function is called before this sink input is
216 * move to a sink and if it returns false the move will not
218 bool (*may_move_to) (pa_sink_input *i, pa_sink *s); /* may be NULL */
220 /* If non-NULL this function is used to dispatch asynchronous
221 * control events. Called from main context. */
222 void (*send_event)(pa_sink_input *i, const char *event, pa_proplist* data); /* may be NULL */
224 /* If non-NULL this function is called whenever the sink input
225 * volume changes. Called from main context */
226 void (*volume_changed)(pa_sink_input *i); /* may be NULL */
228 /* If non-NULL this function is called whenever the sink input
229 * mute status changes. Called from main context */
230 void (*mute_changed)(pa_sink_input *i); /* may be NULL */
233 pa_sink_input_state_t state;
236 pa_cvolume soft_volume;
239 bool attached:1; /* True only between ->attach() and ->detach() calls */
241 /* rewrite_nbytes: 0: rewrite nothing, (size_t) -1: rewrite everything, otherwise how many bytes to rewrite */
242 bool rewrite_flush:1, dont_rewind_render:1;
243 size_t rewrite_nbytes;
244 uint64_t underrun_for, playing_for;
245 uint64_t underrun_for_sink; /* Like underrun_for, but in sink sample spec */
247 pa_sample_spec sample_spec;
249 pa_resampler *resampler; /* may be NULL */
251 /* We maintain a history of resampled audio data here. */
252 pa_memblockq *render_memblockq;
254 pa_sink_input *sync_prev, *sync_next;
256 /* The requested latency for the sink */
257 pa_usec_t requested_sink_latency;
259 pa_hashmap *direct_outputs;
261 pa_cvolume_ramp_int ramp;
267 PA_DECLARE_PUBLIC_CLASS(pa_sink_input);
268 #define PA_SINK_INPUT(o) pa_sink_input_cast(o)
271 PA_SINK_INPUT_MESSAGE_SET_SOFT_VOLUME,
272 PA_SINK_INPUT_MESSAGE_SET_SOFT_MUTE,
273 PA_SINK_INPUT_MESSAGE_GET_LATENCY,
274 PA_SINK_INPUT_MESSAGE_SET_RATE,
275 PA_SINK_INPUT_MESSAGE_SET_STATE,
276 PA_SINK_INPUT_MESSAGE_SET_REQUESTED_LATENCY,
277 PA_SINK_INPUT_MESSAGE_GET_REQUESTED_LATENCY,
278 PA_SINK_INPUT_MESSAGE_SET_VOLUME_RAMP,
279 PA_SINK_INPUT_MESSAGE_MAX
282 typedef struct pa_sink_input_send_event_hook_data {
283 pa_sink_input *sink_input;
286 } pa_sink_input_send_event_hook_data;
288 typedef struct pa_sink_input_new_data {
289 pa_sink_input_flags_t flags;
291 pa_proplist *proplist;
298 pa_sink *origin_sink;
300 pa_resample_method_t resample_method;
302 pa_sink_input *sync_base;
304 pa_sample_spec sample_spec;
305 pa_channel_map channel_map;
306 pa_format_info *format;
307 pa_idxset *req_formats;
308 pa_idxset *nego_formats;
312 pa_hashmap *volume_factor_items, *volume_factor_sink_items;
314 bool sample_spec_is_set:1;
315 bool channel_map_is_set:1;
317 bool volume_is_set:1;
320 bool volume_is_absolute:1;
322 bool volume_writable:1;
324 bool save_sink:1, save_volume:1, save_muted:1;
325 } pa_sink_input_new_data;
327 pa_sink_input_new_data* pa_sink_input_new_data_init(pa_sink_input_new_data *data);
328 void pa_sink_input_new_data_set_sample_spec(pa_sink_input_new_data *data, const pa_sample_spec *spec);
329 void pa_sink_input_new_data_set_channel_map(pa_sink_input_new_data *data, const pa_channel_map *map);
330 bool pa_sink_input_new_data_is_passthrough(pa_sink_input_new_data *data);
331 void pa_sink_input_new_data_set_volume(pa_sink_input_new_data *data, const pa_cvolume *volume);
332 void pa_sink_input_new_data_add_volume_factor(pa_sink_input_new_data *data, const char *key, const pa_cvolume *volume_factor);
333 void pa_sink_input_new_data_add_volume_factor_sink(pa_sink_input_new_data *data, const char *key, const pa_cvolume *volume_factor);
334 void pa_sink_input_new_data_set_muted(pa_sink_input_new_data *data, bool mute);
335 bool pa_sink_input_new_data_set_sink(pa_sink_input_new_data *data, pa_sink *s, bool save);
336 bool pa_sink_input_new_data_set_formats(pa_sink_input_new_data *data, pa_idxset *formats);
337 void pa_sink_input_new_data_done(pa_sink_input_new_data *data);
339 /* To be called by the implementing module only */
341 int pa_sink_input_new(
344 pa_sink_input_new_data *data);
346 void pa_sink_input_put(pa_sink_input *i);
347 void pa_sink_input_unlink(pa_sink_input* i);
349 void pa_sink_input_set_name(pa_sink_input *i, const char *name);
351 pa_usec_t pa_sink_input_set_requested_latency(pa_sink_input *i, pa_usec_t usec);
353 /* Request that the specified number of bytes already written out to
354 the hw device is rewritten, if possible. Please note that this is
355 only a kind request. The sink driver may not be able to fulfill it
356 fully -- or at all. If the request for a rewrite was successful, the
357 sink driver will call ->rewind() and pass the number of bytes that
358 could be rewound in the HW device. This functionality is required for
359 implementing the "zero latency" write-through functionality. */
360 void pa_sink_input_request_rewind(pa_sink_input *i, size_t nbytes, bool rewrite, bool flush, bool dont_rewind_render);
362 void pa_sink_input_cork(pa_sink_input *i, bool b);
364 int pa_sink_input_set_rate(pa_sink_input *i, uint32_t rate);
365 int pa_sink_input_update_rate(pa_sink_input *i);
367 /* This returns the sink's fields converted into out sample type */
368 size_t pa_sink_input_get_max_rewind(pa_sink_input *i);
369 size_t pa_sink_input_get_max_request(pa_sink_input *i);
371 /* Callable by everyone from main thread*/
373 /* External code may request disconnection with this function */
374 void pa_sink_input_kill(pa_sink_input*i);
376 pa_usec_t pa_sink_input_get_latency(pa_sink_input *i, pa_usec_t *sink_latency);
378 bool pa_sink_input_is_passthrough(pa_sink_input *i);
379 bool pa_sink_input_is_volume_readable(pa_sink_input *i);
380 void pa_sink_input_set_volume(pa_sink_input *i, const pa_cvolume *volume, bool save, bool absolute);
381 void pa_sink_input_add_volume_factor(pa_sink_input *i, const char *key, const pa_cvolume *volume_factor);
382 int pa_sink_input_remove_volume_factor(pa_sink_input *i, const char *key);
383 pa_cvolume *pa_sink_input_get_volume(pa_sink_input *i, pa_cvolume *volume, bool absolute);
385 void pa_sink_input_set_mute(pa_sink_input *i, bool mute, bool save);
386 bool pa_sink_input_get_mute(pa_sink_input *i);
388 void pa_sink_input_set_volume_ramp(pa_sink_input *i, const pa_cvolume_ramp *ramp, bool send_msg, bool save);
390 void pa_sink_input_update_proplist(pa_sink_input *i, pa_update_mode_t mode, pa_proplist *p);
392 pa_resample_method_t pa_sink_input_get_resample_method(pa_sink_input *i);
394 void pa_sink_input_send_event(pa_sink_input *i, const char *name, pa_proplist *data);
396 int pa_sink_input_move_to(pa_sink_input *i, pa_sink *dest, bool save);
397 bool pa_sink_input_may_move(pa_sink_input *i); /* may this sink input move at all? */
398 bool pa_sink_input_may_move_to(pa_sink_input *i, pa_sink *dest); /* may this sink input move to this sink? */
400 /* The same as pa_sink_input_move_to() but in two separate steps,
401 * first the detaching from the old sink, then the attaching to the
403 int pa_sink_input_start_move(pa_sink_input *i);
404 int pa_sink_input_finish_move(pa_sink_input *i, pa_sink *dest, bool save);
405 void pa_sink_input_fail_move(pa_sink_input *i);
407 pa_sink_input_state_t pa_sink_input_get_state(pa_sink_input *i);
409 pa_usec_t pa_sink_input_get_requested_latency(pa_sink_input *i);
411 /* To be used exclusively by the sink driver IO thread */
413 void pa_sink_input_peek(pa_sink_input *i, size_t length, pa_memchunk *chunk, pa_cvolume *volume);
414 void pa_sink_input_drop(pa_sink_input *i, size_t length);
415 void pa_sink_input_process_rewind(pa_sink_input *i, size_t nbytes /* in the sink's sample spec */);
416 void pa_sink_input_update_max_rewind(pa_sink_input *i, size_t nbytes /* in the sink's sample spec */);
417 void pa_sink_input_update_max_request(pa_sink_input *i, size_t nbytes /* in the sink's sample spec */);
419 void pa_sink_input_set_state_within_thread(pa_sink_input *i, pa_sink_input_state_t state);
421 int pa_sink_input_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offset, pa_memchunk *chunk);
423 pa_usec_t pa_sink_input_set_requested_latency_within_thread(pa_sink_input *i, pa_usec_t usec);
425 bool pa_sink_input_safe_to_remove(pa_sink_input *i);
426 bool pa_sink_input_process_underrun(pa_sink_input *i);
428 pa_memchunk* pa_sink_input_get_silence(pa_sink_input *i, pa_memchunk *ret);
430 #define pa_sink_input_assert_io_context(s) \
431 pa_assert(pa_thread_mq_get() || !PA_SINK_INPUT_IS_LINKED((s)->state))