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>
39 typedef enum pa_sink_input_state {
40 PA_SINK_INPUT_INIT, /*< The stream is not active yet, because pa_sink_input_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 /* FIXME: we need a state for MOVING here */
46 } pa_sink_input_state_t;
48 static inline pa_bool_t PA_SINK_INPUT_IS_LINKED(pa_sink_input_state_t x) {
49 return x == PA_SINK_INPUT_DRAINED || x == PA_SINK_INPUT_RUNNING || x == PA_SINK_INPUT_CORKED;
52 typedef enum pa_sink_input_flags {
53 PA_SINK_INPUT_VARIABLE_RATE = 1,
54 PA_SINK_INPUT_DONT_MOVE = 2,
55 PA_SINK_INPUT_START_CORKED = 4,
56 PA_SINK_INPUT_NO_REMAP = 8,
57 PA_SINK_INPUT_NO_REMIX = 16,
58 PA_SINK_INPUT_FIX_FORMAT = 32,
59 PA_SINK_INPUT_FIX_RATE = 64,
60 PA_SINK_INPUT_FIX_CHANNELS = 128,
61 PA_SINK_INPUT_DONT_INHIBIT_AUTO_SUSPEND = 256,
62 PA_SINK_INPUT_NO_CREATE_ON_SUSPEND = 512,
63 PA_SINK_INPUT_KILL_ON_SUSPEND = 1024,
64 PA_SINK_INPUT_PASSTHROUGH = 2048,
65 PA_SINK_INPUT_START_RAMP_MUTED = 4096,
66 } pa_sink_input_flags_t;
68 struct pa_sink_input {
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;
80 char *driver; /* may be NULL */
81 pa_proplist *proplist;
83 pa_module *module; /* may be NULL */
84 pa_client *client; /* may be NULL */
86 pa_sink *sink; /* NULL while we are being moved */
87 pa_sink *origin_sink; /* only set by filter sinks */
89 /* A sink input may be connected to multiple source outputs
90 * directly, so that they don't get mixed data of the entire
92 pa_idxset *direct_outputs;
94 pa_sample_spec sample_spec;
95 pa_channel_map channel_map;
96 pa_format_info *format;
98 pa_sink_input *sync_prev, *sync_next;
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 */
107 pa_cvolume volume_factor_sink; /* A second volume factor in format of the sink this stream is connected to */
109 pa_bool_t volume_writable:1;
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
117 pa_bool_t save_sink:1, save_volume:1, save_muted:1;
119 /* for volume ramps */
120 pa_cvolume_ramp_int ramp;
123 pa_bool_t corked_internal;
125 pa_resample_method_t requested_resample_method, actual_resample_method;
127 /* Returns the chunk of audio data and drops it from the
128 * queue. Returns -1 on failure. Called from IO thread context. If
129 * data needs to be generated from scratch then please in the
130 * specified length request_nbytes. This is an optimization
131 * only. If less data is available, it's fine to return a smaller
132 * block. If more data is already ready, it is better to return
134 int (*pop) (pa_sink_input *i, size_t request_nbytes, pa_memchunk *chunk); /* may NOT be NULL */
136 /* Rewind the queue by the specified number of bytes. Called just
137 * before peek() if it is called at all. Only called if the sink
138 * input driver ever plans to call
139 * pa_sink_input_request_rewind(). Called from IO context. */
140 void (*process_rewind) (pa_sink_input *i, size_t nbytes); /* may NOT be NULL */
142 /* Called whenever the maximum rewindable size of the sink
143 * changes. Called from IO context. */
144 void (*update_max_rewind) (pa_sink_input *i, size_t nbytes); /* may be NULL */
146 /* Called whenever the maximum request size of the sink
147 * changes. Called from IO context. */
148 void (*update_max_request) (pa_sink_input *i, size_t nbytes); /* may be NULL */
150 /* Called whenever the configured latency of the sink
151 * changes. Called from IO context. */
152 void (*update_sink_requested_latency) (pa_sink_input *i); /* may be NULL */
154 /* Called whenever the latency range of the sink changes. Called
155 * from IO context. */
156 void (*update_sink_latency_range) (pa_sink_input *i); /* may be NULL */
158 /* Called whenever the fixed latency of the sink changes, if there
159 * is one. Called from IO context. */
160 void (*update_sink_fixed_latency) (pa_sink_input *i); /* may be NULL */
162 /* If non-NULL this function is called when the input is first
163 * connected to a sink or when the rtpoll/asyncmsgq fields
164 * change. You usually don't need to implement this function
165 * unless you rewrite a sink that is piggy-backed onto
166 * another. Called from IO thread context */
167 void (*attach) (pa_sink_input *i); /* may be NULL */
169 /* If non-NULL this function is called when the output is
170 * disconnected from its sink. Called from IO thread context */
171 void (*detach) (pa_sink_input *i); /* may be NULL */
173 /* If non-NULL called whenever the sink this input is attached
174 * to suspends or resumes. Called from main context */
175 void (*suspend) (pa_sink_input *i, pa_bool_t b); /* may be NULL */
177 /* If non-NULL called whenever the sink this input is attached
178 * to suspends or resumes. Called from IO context */
179 void (*suspend_within_thread) (pa_sink_input *i, pa_bool_t b); /* may be NULL */
181 /* If non-NULL called whenever the sink input is moved to a new
182 * sink. Called from main context after the sink input has been
183 * detached from the old sink and before it has been attached to
184 * the new sink. If dest is NULL the move was executed in two
185 * phases and the second one failed; the stream will be destroyed
186 * after this call. */
187 void (*moving) (pa_sink_input *i, pa_sink *dest); /* may be NULL */
189 /* Supposed to unlink and destroy this stream. Called from main
191 void (*kill) (pa_sink_input *i); /* may NOT be NULL */
193 /* Return the current latency (i.e. length of buffered audio) of
194 this stream. Called from main context. This is added to what the
195 PA_SINK_INPUT_MESSAGE_GET_LATENCY message sent to the IO thread
197 pa_usec_t (*get_latency) (pa_sink_input *i); /* may be NULL */
199 /* If non-NULL this function is called from thread context if the
200 * state changes. The old state is found in thread_info.state. */
201 void (*state_change) (pa_sink_input *i, pa_sink_input_state_t state); /* may be NULL */
203 /* If non-NULL this function is called before this sink input is
204 * move to a sink and if it returns FALSE the move will not
206 pa_bool_t (*may_move_to) (pa_sink_input *i, pa_sink *s); /* may be NULL */
208 /* If non-NULL this function is used to dispatch asynchronous
209 * control events. Called from main context. */
210 void (*send_event)(pa_sink_input *i, const char *event, pa_proplist* data); /* may be NULL */
212 /* If non-NULL this function is called whenever the sink input
213 * volume changes. Called from main context */
214 void (*volume_changed)(pa_sink_input *i); /* may be NULL */
216 /* If non-NULL this function is called whenever the sink input
217 * mute status changes. Called from main context */
218 void (*mute_changed)(pa_sink_input *i); /* may be NULL */
221 pa_sink_input_state_t state;
224 pa_cvolume soft_volume;
227 pa_bool_t attached:1; /* True only between ->attach() and ->detach() calls */
229 /* rewrite_nbytes: 0: rewrite nothing, (size_t) -1: rewrite everything, otherwise how many bytes to rewrite */
230 pa_bool_t rewrite_flush:1, dont_rewind_render:1;
231 size_t rewrite_nbytes;
232 uint64_t underrun_for, playing_for;
234 pa_sample_spec sample_spec;
236 pa_resampler *resampler; /* may be NULL */
238 /* We maintain a history of resampled audio data here. */
239 pa_memblockq *render_memblockq;
241 pa_sink_input *sync_prev, *sync_next;
243 /* The requested latency for the sink */
244 pa_usec_t requested_sink_latency;
246 pa_hashmap *direct_outputs;
248 pa_cvolume_ramp_int ramp;
254 PA_DECLARE_PUBLIC_CLASS(pa_sink_input);
255 #define PA_SINK_INPUT(o) pa_sink_input_cast(o)
258 PA_SINK_INPUT_MESSAGE_SET_SOFT_VOLUME,
259 PA_SINK_INPUT_MESSAGE_SET_SOFT_MUTE,
260 PA_SINK_INPUT_MESSAGE_GET_LATENCY,
261 PA_SINK_INPUT_MESSAGE_SET_RATE,
262 PA_SINK_INPUT_MESSAGE_SET_STATE,
263 PA_SINK_INPUT_MESSAGE_SET_REQUESTED_LATENCY,
264 PA_SINK_INPUT_MESSAGE_GET_REQUESTED_LATENCY,
265 PA_SINK_INPUT_MESSAGE_SET_VOLUME_RAMP,
266 PA_SINK_INPUT_MESSAGE_MAX
269 typedef struct pa_sink_input_send_event_hook_data {
270 pa_sink_input *sink_input;
273 } pa_sink_input_send_event_hook_data;
275 typedef struct pa_sink_input_new_data {
276 pa_sink_input_flags_t flags;
278 pa_proplist *proplist;
285 pa_sink *origin_sink;
287 pa_resample_method_t resample_method;
289 pa_sink_input *sync_base;
291 pa_sample_spec sample_spec;
292 pa_channel_map channel_map;
293 pa_format_info *format;
294 pa_idxset *req_formats;
295 pa_idxset *nego_formats;
297 pa_cvolume volume, volume_factor, volume_factor_sink;
300 pa_bool_t sample_spec_is_set:1;
301 pa_bool_t channel_map_is_set:1;
303 pa_bool_t volume_is_set:1, volume_factor_is_set:1, volume_factor_sink_is_set:1;
304 pa_bool_t muted_is_set:1;
306 pa_bool_t volume_is_absolute:1;
308 pa_bool_t volume_writable:1;
310 pa_bool_t save_sink:1, save_volume:1, save_muted:1;
311 } pa_sink_input_new_data;
313 pa_sink_input_new_data* pa_sink_input_new_data_init(pa_sink_input_new_data *data);
314 void pa_sink_input_new_data_set_sample_spec(pa_sink_input_new_data *data, const pa_sample_spec *spec);
315 void pa_sink_input_new_data_set_channel_map(pa_sink_input_new_data *data, const pa_channel_map *map);
316 pa_bool_t pa_sink_input_new_data_is_passthrough(pa_sink_input_new_data *data);
317 void pa_sink_input_new_data_set_volume(pa_sink_input_new_data *data, const pa_cvolume *volume);
318 void pa_sink_input_new_data_apply_volume_factor(pa_sink_input_new_data *data, const pa_cvolume *volume_factor);
319 void pa_sink_input_new_data_apply_volume_factor_sink(pa_sink_input_new_data *data, const pa_cvolume *volume_factor);
320 void pa_sink_input_new_data_set_muted(pa_sink_input_new_data *data, pa_bool_t mute);
321 pa_bool_t pa_sink_input_new_data_set_sink(pa_sink_input_new_data *data, pa_sink *s, pa_bool_t save);
322 pa_bool_t pa_sink_input_new_data_set_formats(pa_sink_input_new_data *data, pa_idxset *formats);
323 void pa_sink_input_new_data_done(pa_sink_input_new_data *data);
325 /* To be called by the implementing module only */
327 int pa_sink_input_new(
330 pa_sink_input_new_data *data);
332 void pa_sink_input_put(pa_sink_input *i);
333 void pa_sink_input_unlink(pa_sink_input* i);
335 void pa_sink_input_set_name(pa_sink_input *i, const char *name);
337 pa_usec_t pa_sink_input_set_requested_latency(pa_sink_input *i, pa_usec_t usec);
339 /* Request that the specified number of bytes already written out to
340 the hw device is rewritten, if possible. Please note that this is
341 only a kind request. The sink driver may not be able to fulfill it
342 fully -- or at all. If the request for a rewrite was successful, the
343 sink driver will call ->rewind() and pass the number of bytes that
344 could be rewound in the HW device. This functionality is required for
345 implementing the "zero latency" write-through functionality. */
346 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);
348 void pa_sink_input_cork(pa_sink_input *i, pa_bool_t b);
349 void pa_sink_input_cork_internal(pa_sink_input *i, pa_bool_t b);
351 int pa_sink_input_set_rate(pa_sink_input *i, uint32_t rate);
352 int pa_sink_input_update_rate(pa_sink_input *i);
354 /* This returns the sink's fields converted into out sample type */
355 size_t pa_sink_input_get_max_rewind(pa_sink_input *i);
356 size_t pa_sink_input_get_max_request(pa_sink_input *i);
358 /* Callable by everyone from main thread*/
360 /* External code may request disconnection with this function */
361 void pa_sink_input_kill(pa_sink_input*i);
363 pa_usec_t pa_sink_input_get_latency(pa_sink_input *i, pa_usec_t *sink_latency);
365 pa_bool_t pa_sink_input_is_passthrough(pa_sink_input *i);
366 pa_bool_t pa_sink_input_is_volume_readable(pa_sink_input *i);
367 void pa_sink_input_set_volume(pa_sink_input *i, const pa_cvolume *volume, pa_bool_t save, pa_bool_t absolute);
368 pa_cvolume *pa_sink_input_get_volume(pa_sink_input *i, pa_cvolume *volume, pa_bool_t absolute);
370 void pa_sink_input_set_mute(pa_sink_input *i, pa_bool_t mute, pa_bool_t save);
371 pa_bool_t pa_sink_input_get_mute(pa_sink_input *i);
373 void pa_sink_input_set_volume_ramp(pa_sink_input *i, const pa_cvolume_ramp *ramp, pa_bool_t send_msg, pa_bool_t save);
375 void pa_sink_input_update_proplist(pa_sink_input *i, pa_update_mode_t mode, pa_proplist *p);
377 pa_resample_method_t pa_sink_input_get_resample_method(pa_sink_input *i);
379 void pa_sink_input_send_event(pa_sink_input *i, const char *name, pa_proplist *data);
381 int pa_sink_input_move_to(pa_sink_input *i, pa_sink *dest, pa_bool_t save);
382 pa_bool_t pa_sink_input_may_move(pa_sink_input *i); /* may this sink input move at all? */
383 pa_bool_t pa_sink_input_may_move_to(pa_sink_input *i, pa_sink *dest); /* may this sink input move to this sink? */
385 /* The same as pa_sink_input_move_to() but in two separate steps,
386 * first the detaching from the old sink, then the attaching to the
388 int pa_sink_input_start_move(pa_sink_input *i);
389 int pa_sink_input_finish_move(pa_sink_input *i, pa_sink *dest, pa_bool_t save);
390 void pa_sink_input_fail_move(pa_sink_input *i);
392 pa_sink_input_state_t pa_sink_input_get_state(pa_sink_input *i);
394 pa_usec_t pa_sink_input_get_requested_latency(pa_sink_input *i);
396 /* To be used exclusively by the sink driver IO thread */
398 void pa_sink_input_peek(pa_sink_input *i, size_t length, pa_memchunk *chunk, pa_cvolume *volume);
399 void pa_sink_input_drop(pa_sink_input *i, size_t length);
400 void pa_sink_input_process_rewind(pa_sink_input *i, size_t nbytes /* in the sink's sample spec */);
401 void pa_sink_input_update_max_rewind(pa_sink_input *i, size_t nbytes /* in the sink's sample spec */);
402 void pa_sink_input_update_max_request(pa_sink_input *i, size_t nbytes /* in the sink's sample spec */);
404 void pa_sink_input_set_state_within_thread(pa_sink_input *i, pa_sink_input_state_t state);
406 int pa_sink_input_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offset, pa_memchunk *chunk);
408 pa_usec_t pa_sink_input_set_requested_latency_within_thread(pa_sink_input *i, pa_usec_t usec);
410 pa_bool_t pa_sink_input_safe_to_remove(pa_sink_input *i);
412 pa_memchunk* pa_sink_input_get_silence(pa_sink_input *i, pa_memchunk *ret);
414 #define pa_sink_input_assert_io_context(s) \
415 pa_assert(pa_thread_mq_get() || !PA_SINK_INPUT_IS_LINKED((s)->state))