1 #ifndef foopulsesourceoutputhfoo
2 #define foopulsesourceoutputhfoo
5 This file is part of PulseAudio.
7 Copyright 2004-2006 Lennart Poettering
9 PulseAudio is free software; you can redistribute it and/or modify
10 it under the terms of the GNU Lesser General Public License as published
11 by the Free Software Foundation; either version 2.1 of the License,
12 or (at your option) any later version.
14 PulseAudio is distributed in the hope that it will be useful, but
15 WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 General Public License for more details.
19 You should have received a copy of the GNU Lesser General Public License
20 along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
25 #include <pulsecore/typedefs.h>
26 #include <pulse/sample.h>
27 #include <pulse/format.h>
28 #include <pulsecore/memblockq.h>
29 #include <pulsecore/resampler.h>
30 #include <pulsecore/module.h>
31 #include <pulsecore/client.h>
32 #include <pulsecore/source.h>
33 #include <pulsecore/core.h>
34 #include <pulsecore/sink-input.h>
36 typedef enum pa_source_output_state {
37 PA_SOURCE_OUTPUT_INIT,
38 PA_SOURCE_OUTPUT_RUNNING,
39 PA_SOURCE_OUTPUT_CORKED,
40 PA_SOURCE_OUTPUT_UNLINKED
41 } pa_source_output_state_t;
43 static inline bool PA_SOURCE_OUTPUT_IS_LINKED(pa_source_output_state_t x) {
44 return x == PA_SOURCE_OUTPUT_RUNNING || x == PA_SOURCE_OUTPUT_CORKED;
47 typedef enum pa_source_output_flags {
48 PA_SOURCE_OUTPUT_VARIABLE_RATE = 1,
49 PA_SOURCE_OUTPUT_DONT_MOVE = 2,
50 PA_SOURCE_OUTPUT_START_CORKED = 4,
51 PA_SOURCE_OUTPUT_NO_REMAP = 8,
52 PA_SOURCE_OUTPUT_NO_REMIX = 16,
53 PA_SOURCE_OUTPUT_FIX_FORMAT = 32,
54 PA_SOURCE_OUTPUT_FIX_RATE = 64,
55 PA_SOURCE_OUTPUT_FIX_CHANNELS = 128,
56 PA_SOURCE_OUTPUT_DONT_INHIBIT_AUTO_SUSPEND = 256,
57 PA_SOURCE_OUTPUT_NO_CREATE_ON_SUSPEND = 512,
58 PA_SOURCE_OUTPUT_KILL_ON_SUSPEND = 1024,
59 PA_SOURCE_OUTPUT_PASSTHROUGH = 2048,
61 PA_SOURCE_OUTPUT_PREPROCESSOR = 4096,
63 } pa_source_output_flags_t;
65 struct pa_source_output {
71 pa_source_output_state_t state;
72 pa_source_output_flags_t flags;
74 char *driver; /* may be NULL */
75 pa_proplist *proplist;
77 pa_module *module; /* may be NULL */
78 pa_client *client; /* may be NULL */
80 pa_source *source; /* NULL while being moved */
82 /* This is set to true when creating the source output if the source was
83 * requested by the application that created the source output. This is
84 * sometimes useful for determining whether the source output should be
85 * moved by some automatic policy. If the source output is moved away from
86 * the source that the application requested, this flag is reset to
88 bool source_requested_by_application;
90 pa_source *destination_source; /* only set by filter sources */
92 /* A source output can monitor just a single input of a sink, in which case we find it here */
93 pa_sink_input *direct_on_input; /* may be NULL */
95 pa_sample_spec sample_spec;
96 pa_channel_map channel_map;
97 pa_format_info *format;
99 /* Also see http://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/Developer/Volumes/ */
100 pa_cvolume volume; /* The volume clients are informed about */
101 pa_cvolume reference_ratio; /* The ratio of the stream's volume to the source's reference volume */
102 pa_cvolume real_ratio; /* The ratio of the stream's volume to the source's real volume */
103 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 */
104 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 pa_cvolume volume_factor_source; /* A second volume factor in format of the source this stream is connected to */
109 double individual_volume_ratio; /* The ratio of the stream's volume to the value of its volume group. */
111 bool volume_writable:1;
115 /* if true then the volume and the mute state of this source-output
116 * are worth remembering, module-stream-restore looks for this. */
117 bool save_volume:1, save_muted:1;
119 /* if users move the source-output to a source, and the source is not
120 * default_source, the source->name will be saved in preferred_source. And
121 * later if source-output is moved to other sources for some reason, it
122 * still can be restored to the preferred_source at an appropriate time */
123 char *preferred_source;
125 pa_resample_method_t requested_resample_method, actual_resample_method;
127 /* Pushes a new memchunk into the output. Called from IO thread
129 void (*push)(pa_source_output *o, const pa_memchunk *chunk); /* may NOT be NULL */
131 /* Only relevant for monitor sources right now: called when the
132 * recorded stream is rewound. Called from IO context */
133 void (*process_rewind)(pa_source_output *o, size_t nbytes); /* may be NULL */
135 /* Called whenever the maximum rewindable size of the source
136 * changes. Called from IO thread context. */
137 void (*update_max_rewind) (pa_source_output *o, size_t nbytes); /* may be NULL */
139 /* Called whenever the configured latency of the source
140 * changes. Called from IO context. */
141 void (*update_source_requested_latency) (pa_source_output *o); /* may be NULL */
143 /* Called whenever the latency range of the source changes. Called
144 * from IO context. */
145 void (*update_source_latency_range) (pa_source_output *o); /* may be NULL */
147 /* Called whenever the fixed latency of the source changes, if there
148 * is one. Called from IO context. */
149 void (*update_source_fixed_latency) (pa_source_output *i); /* may be NULL */
151 /* If non-NULL this function is called when the output is first
152 * connected to a source or when the rtpoll/asyncmsgq fields
153 * change. You usually don't need to implement this function
154 * unless you rewrite a source that is piggy-backed onto
155 * another. Called from IO thread context */
156 void (*attach) (pa_source_output *o); /* may be NULL */
158 /* If non-NULL this function is called when the output is
159 * disconnected from its source. Called from IO thread context */
160 void (*detach) (pa_source_output *o); /* may be NULL */
162 /* If non-NULL called whenever the source this output is attached
163 * to suspends or resumes or if the suspend cause changes.
164 * Called from main context */
165 void (*suspend) (pa_source_output *o, pa_source_state_t old_state, pa_suspend_cause_t old_suspend_cause); /* may be NULL */
167 /* If non-NULL called whenever the source this output is attached
168 * to suspends or resumes. Called from IO context */
169 void (*suspend_within_thread) (pa_source_output *o, bool b); /* may be NULL */
171 /* If non-NULL called whenever the source output is moved to a new
172 * source. Called from main context after the source output has been
173 * detached from the old source and before it has been attached to
174 * the new source. If dest is NULL the move was executed in two
175 * phases and the second one failed; the stream will be destroyed
176 * after this call. */
177 void (*moving) (pa_source_output *o, pa_source *dest); /* may be NULL */
179 /* Supposed to unlink and destroy this stream. Called from main
181 void (*kill)(pa_source_output* o); /* may NOT be NULL */
183 /* Return the current latency (i.e. length of buffered audio) of
184 this stream. Called from main context. This is added to what the
185 PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY message sent to the IO thread
187 pa_usec_t (*get_latency) (pa_source_output *o); /* may be NULL */
189 /* If non-NULL this function is called from thread context if the
190 * state changes. The old state is found in thread_info.state. */
191 void (*state_change) (pa_source_output *o, pa_source_output_state_t state); /* may be NULL */
193 /* If non-NULL this function is called before this source output
194 * is moved to a source and if it returns false the move
195 * will not be allowed */
196 bool (*may_move_to) (pa_source_output *o, pa_source *s); /* may be NULL */
198 /* If non-NULL this function is used to dispatch asynchronous
200 void (*send_event)(pa_source_output *o, const char *event, pa_proplist* data);
202 /* If non-NULL this function is called whenever the source output
203 * volume changes. Called from main context */
204 void (*volume_changed)(pa_source_output *o); /* may be NULL */
206 /* If non-NULL this function is called whenever the source output
207 * mute status changes. Called from main context */
208 void (*mute_changed)(pa_source_output *o); /* may be NULL */
211 int (*preprocess)(pa_source_output *o, pa_memchunk *chunk, pa_memchunk *ochunk);
215 pa_source_output_state_t state;
217 pa_cvolume soft_volume;
220 bool attached:1; /* True only between ->attach() and ->detach() calls */
222 pa_sample_spec sample_spec;
224 pa_resampler* resampler; /* may be NULL */
226 /* We maintain a delay memblockq here for source outputs that
227 * don't implement rewind() */
228 pa_memblockq *delay_memblockq;
230 /* The requested latency for the source */
231 pa_usec_t requested_source_latency;
233 pa_sink_input *direct_on_input; /* may be NULL */
236 void *processor_holder;
240 pa_usec_t time_of_start_to_run;
248 PA_DECLARE_PUBLIC_CLASS(pa_source_output);
249 #define PA_SOURCE_OUTPUT(o) pa_source_output_cast(o)
252 PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY,
253 PA_SOURCE_OUTPUT_MESSAGE_SET_RATE,
254 PA_SOURCE_OUTPUT_MESSAGE_SET_STATE,
255 PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY,
256 PA_SOURCE_OUTPUT_MESSAGE_GET_REQUESTED_LATENCY,
257 PA_SOURCE_OUTPUT_MESSAGE_SET_SOFT_VOLUME,
258 PA_SOURCE_OUTPUT_MESSAGE_SET_SOFT_MUTE,
259 PA_SOURCE_OUTPUT_MESSAGE_MAX
262 typedef struct pa_source_output_send_event_hook_data {
263 pa_source_output *source_output;
266 } pa_source_output_send_event_hook_data;
268 typedef struct pa_source_output_new_data {
269 pa_source_output_flags_t flags;
271 pa_proplist *proplist;
272 pa_sink_input *direct_on_input;
279 bool source_requested_by_application;
280 pa_source *destination_source;
282 pa_resample_method_t resample_method;
284 pa_sample_spec sample_spec;
285 pa_channel_map channel_map;
286 pa_format_info *format;
287 pa_idxset *req_formats;
288 pa_idxset *nego_formats;
290 pa_cvolume volume, volume_factor, volume_factor_source;
292 double individual_volume_ratio;
293 void *processor_holder;
297 bool sample_spec_is_set:1;
298 bool channel_map_is_set:1;
300 bool volume_is_set:1, volume_factor_is_set:1, volume_factor_source_is_set:1;
303 bool volume_is_absolute:1;
305 bool volume_writable:1;
307 bool save_volume:1, save_muted:1;
308 char *preferred_source;
309 } pa_source_output_new_data;
311 pa_source_output_new_data* pa_source_output_new_data_init(pa_source_output_new_data *data);
312 void pa_source_output_new_data_set_sample_spec(pa_source_output_new_data *data, const pa_sample_spec *spec);
313 void pa_source_output_new_data_set_channel_map(pa_source_output_new_data *data, const pa_channel_map *map);
314 bool pa_source_output_new_data_is_passthrough(pa_source_output_new_data *data);
315 void pa_source_output_new_data_set_volume(pa_source_output_new_data *data, const pa_cvolume *volume);
316 void pa_source_output_new_data_apply_volume_factor(pa_source_output_new_data *data, const pa_cvolume *volume_factor);
317 void pa_source_output_new_data_apply_volume_factor_source(pa_source_output_new_data *data, const pa_cvolume *volume_factor);
318 void pa_source_output_new_data_set_muted(pa_source_output_new_data *data, bool mute);
319 bool pa_source_output_new_data_set_source(pa_source_output_new_data *data, pa_source *s, bool save,
320 bool requested_by_application);
321 bool pa_source_output_new_data_set_formats(pa_source_output_new_data *data, pa_idxset *formats);
322 void pa_source_output_new_data_done(pa_source_output_new_data *data);
324 /* To be called by the implementing module only */
326 int pa_source_output_new(
329 pa_source_output_new_data *data);
331 void pa_source_output_put(pa_source_output *o);
332 void pa_source_output_unlink(pa_source_output*o);
334 pa_usec_t pa_source_output_set_requested_latency(pa_source_output *o, pa_usec_t usec);
336 void pa_source_output_cork(pa_source_output *o, bool b);
338 int pa_source_output_set_rate(pa_source_output *o, uint32_t rate);
339 int pa_source_output_update_resampler(pa_source_output *o);
341 size_t pa_source_output_get_max_rewind(pa_source_output *o);
343 /* Callable by everyone */
345 /* External code may request disconnection with this function */
346 void pa_source_output_kill(pa_source_output*o);
348 pa_usec_t pa_source_output_get_latency(pa_source_output *o, pa_usec_t *source_latency);
350 bool pa_source_output_is_volume_readable(pa_source_output *o);
351 bool pa_source_output_is_passthrough(pa_source_output *o);
352 void pa_source_output_set_volume(pa_source_output *o, const pa_cvolume *volume, bool save, bool absolute);
353 pa_cvolume *pa_source_output_get_volume(pa_source_output *o, pa_cvolume *volume, bool absolute);
355 void pa_source_output_set_mute(pa_source_output *o, bool mute, bool save);
357 void pa_source_output_set_property(pa_source_output *o, const char *key, const char *value);
358 void pa_source_output_set_property_arbitrary(pa_source_output *o, const char *key, const uint8_t *value, size_t nbytes);
359 void pa_source_output_update_proplist(pa_source_output *o, pa_update_mode_t mode, pa_proplist *p);
361 pa_resample_method_t pa_source_output_get_resample_method(pa_source_output *o);
363 void pa_source_output_send_event(pa_source_output *o, const char *name, pa_proplist *data);
365 bool pa_source_output_may_move(pa_source_output *o);
366 bool pa_source_output_may_move_to(pa_source_output *o, pa_source *dest);
367 int pa_source_output_move_to(pa_source_output *o, pa_source *dest, bool save);
369 /* The same as pa_source_output_move_to() but in two separate steps,
370 * first the detaching from the old source, then the attaching to the
372 int pa_source_output_start_move(pa_source_output *o);
373 int pa_source_output_finish_move(pa_source_output *o, pa_source *dest, bool save);
374 void pa_source_output_fail_move(pa_source_output *o);
376 pa_usec_t pa_source_output_get_requested_latency(pa_source_output *o);
378 /* To be used exclusively by the source driver thread */
380 void pa_source_output_push(pa_source_output *o, const pa_memchunk *chunk);
381 void pa_source_output_process_rewind(pa_source_output *o, size_t nbytes);
382 void pa_source_output_update_max_rewind(pa_source_output *o, size_t nbytes);
384 void pa_source_output_set_state_within_thread(pa_source_output *o, pa_source_output_state_t state);
386 int pa_source_output_process_msg(pa_msgobject *mo, int code, void *userdata, int64_t offset, pa_memchunk *chunk);
388 pa_usec_t pa_source_output_set_requested_latency_within_thread(pa_source_output *o, pa_usec_t usec);
390 /* Calls the attach() callback if it's set. The output must be in detached
392 void pa_source_output_attach(pa_source_output *o);
394 /* Calls the detach() callback if it's set and the output is attached. The
395 * output is allowed to be already detached, in which case this does nothing.
397 * The reason why this can be called for already-detached outputs is that when
398 * a filter source's output is detached, it has to detach also all outputs
399 * connected to the filter source. In case the filter source's output was
400 * detached because the filter source is being removed, those other outputs
401 * will be moved to another source or removed, and moving and removing involve
402 * detaching the outputs, but the outputs at that point are already detached.
404 * XXX: Moving or removing an output also involves sending messages to the
405 * output's source. If the output's source is a detached filter source,
406 * shouldn't sending messages to it be prohibited? The messages are processed
407 * in the root source's IO thread, and when the filter source is detached, it
408 * would seem logical to prohibit any interaction with the IO thread that isn't
409 * any more associated with the filter source. Currently sending messages to
410 * detached filter sources mostly works, because the filter sources don't
411 * update their asyncmsgq pointer when detaching, so messages still find their
412 * way to the old IO thread. */
413 void pa_source_output_detach(pa_source_output *o);
415 /* Called from the main thread, from source.c only. The normal way to set the
416 * source output volume is to call pa_source_output_set_volume(), but the flat
417 * volume logic in source.c needs also a function that doesn't do all the extra
418 * stuff that pa_source_output_set_volume() does. This function simply sets
419 * o->volume and fires change notifications. */
420 void pa_source_output_set_volume_direct(pa_source_output *o, const pa_cvolume *volume);
422 /* Called from the main thread, from source.c only. This shouldn't be a public
423 * function, but the flat volume logic in source.c currently needs a way to
424 * directly set the source output reference ratio. This function simply sets
425 * o->reference_ratio and logs a message if the value changes. */
426 void pa_source_output_set_reference_ratio(pa_source_output *o, const pa_cvolume *ratio);
428 void pa_source_output_set_preferred_source(pa_source_output *o, pa_source *s);
431 void pa_source_output_dump_info(pa_source_output *o, unsigned int iteration, unsigned int total);
434 #define pa_source_output_assert_io_context(s) \
435 pa_assert(pa_thread_mq_get() || !PA_SOURCE_OUTPUT_IS_LINKED((s)->state))