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 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 <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>
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;
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;
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;
64 struct pa_sink_input {
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;
76 char *driver; /* may be NULL */
77 pa_proplist *proplist;
79 pa_module *module; /* may be NULL */
80 pa_client *client; /* may be NULL */
82 pa_sink *sink; /* NULL while we are being moved */
84 /* A sink input may be connected to multiple source outputs
85 * directly, so that they don't get mixed data of the entire
87 pa_idxset *direct_outputs;
89 pa_sample_spec sample_spec;
90 pa_channel_map channel_map;
92 pa_sink_input *sync_prev, *sync_next;
94 pa_cvolume virtual_volume, soft_volume, volume_factor;
97 /* if TRUE then the source we are connected to and/or the volume
98 * set is worth remembering, i.e. was explicitly chosen by the
99 * user and not automatically. module-stream-restore looks for
101 pa_bool_t save_sink:1, save_volume:1, save_muted:1;
103 pa_resample_method_t requested_resample_method, actual_resample_method;
105 /* Returns the chunk of audio data and drops it from the
106 * queue. Returns -1 on failure. Called from IO thread context. If
107 * data needs to be generated from scratch then please in the
108 * specified length request_nbytes. This is an optimization
109 * only. If less data is available, it's fine to return a smaller
110 * block. If more data is already ready, it is better to return
112 int (*pop) (pa_sink_input *i, size_t request_nbytes, pa_memchunk *chunk); /* may NOT be NULL */
114 /* Rewind the queue by the specified number of bytes. Called just
115 * before peek() if it is called at all. Only called if the sink
116 * input driver ever plans to call
117 * pa_sink_input_request_rewind(). Called from IO context. */
118 void (*process_rewind) (pa_sink_input *i, size_t nbytes); /* may NOT be NULL */
120 /* Called whenever the maximum rewindable size of the sink
121 * changes. Called from IO context. */
122 void (*update_max_rewind) (pa_sink_input *i, size_t nbytes); /* may be NULL */
124 /* Called whenever the maxiumum request size of the sink
125 * changes. Called from IO context. */
126 void (*update_max_request) (pa_sink_input *i, size_t nbytes); /* may be NULL */
128 /* Called whenever the configured latency of the sink
129 * changes. Called from IO context. */
130 void (*update_sink_requested_latency) (pa_sink_input *i); /* may be NULL */
132 /* Called whenver the latency range of the sink changes. Called
133 * from IO context. */
134 void (*update_sink_latency_range) (pa_sink_input *i); /* may be NULL */
136 /* If non-NULL this function is called when the input is first
137 * connected to a sink or when the rtpoll/asyncmsgq fields
138 * change. You usually don't need to implement this function
139 * unless you rewrite a sink that is piggy-backed onto
140 * another. Called from IO thread context */
141 void (*attach) (pa_sink_input *i); /* may be NULL */
143 /* If non-NULL this function is called when the output is
144 * disconnected from its sink. Called from IO thread context */
145 void (*detach) (pa_sink_input *i); /* may be NULL */
147 /* If non-NULL called whenever the the sink this input is attached
148 * to suspends or resumes. Called from main context */
149 void (*suspend) (pa_sink_input *i, pa_bool_t b); /* may be NULL */
151 /* If non-NULL called whenever the the sink this input is attached
152 * to changes. Called from main context */
153 void (*moved) (pa_sink_input *i); /* may be NULL */
155 /* Supposed to unlink and destroy this stream. Called from main
157 void (*kill) (pa_sink_input *i); /* may NOT be NULL */
159 /* Return the current latency (i.e. length of bufferd audio) of
160 this stream. Called from main context. This is added to what the
161 PA_SINK_INPUT_MESSAGE_GET_LATENCY message sent to the IO thread
163 pa_usec_t (*get_latency) (pa_sink_input *i); /* may be NULL */
165 /* If non-NULL this function is called from thread context if the
166 * state changes. The old state is found in thread_info.state. */
167 void (*state_change) (pa_sink_input *i, pa_sink_input_state_t state); /* may be NULL */
169 /* If non-NULL this function is called before this sink input is
170 * move to a sink and if it returns FALSE the move will not
172 pa_bool_t (*may_move_to) (pa_sink_input *i, pa_sink *s); /* may be NULL */
174 /* If non-NULL this function is used to dispatch asynchronous
176 void (*send_event)(pa_sink_input *i, const char *event, pa_proplist* data);
179 pa_sink_input_state_t state;
182 pa_cvolume soft_volume;
185 pa_bool_t attached:1; /* True only between ->attach() and ->detach() calls */
187 /* 0: rewrite nothing, (size_t) -1: rewrite everything, otherwise how many bytes to rewrite */
188 pa_bool_t rewrite_flush:1, dont_rewind_render:1;
189 size_t rewrite_nbytes;
190 uint64_t underrun_for, playing_for;
192 pa_sample_spec sample_spec;
194 pa_resampler *resampler; /* may be NULL */
196 /* We maintain a history of resampled audio data here. */
197 pa_memblockq *render_memblockq;
199 pa_sink_input *sync_prev, *sync_next;
201 /* The requested latency for the sink */
202 pa_usec_t requested_sink_latency;
204 pa_hashmap *direct_outputs;
210 PA_DECLARE_CLASS(pa_sink_input);
211 #define PA_SINK_INPUT(o) pa_sink_input_cast(o)
214 PA_SINK_INPUT_MESSAGE_SET_SOFT_VOLUME,
215 PA_SINK_INPUT_MESSAGE_SET_SOFT_MUTE,
216 PA_SINK_INPUT_MESSAGE_GET_LATENCY,
217 PA_SINK_INPUT_MESSAGE_SET_RATE,
218 PA_SINK_INPUT_MESSAGE_SET_STATE,
219 PA_SINK_INPUT_MESSAGE_SET_REQUESTED_LATENCY,
220 PA_SINK_INPUT_MESSAGE_GET_REQUESTED_LATENCY,
221 PA_SINK_INPUT_MESSAGE_MAX
224 typedef struct pa_sink_input_send_event_hook_data {
225 pa_sink_input *sink_input;
228 } pa_sink_input_send_event_hook_data;
230 typedef struct pa_sink_input_new_data {
231 pa_proplist *proplist;
239 pa_resample_method_t resample_method;
241 pa_sink_input *sync_base;
243 pa_sample_spec sample_spec;
244 pa_channel_map channel_map;
246 pa_cvolume volume, volume_factor;
249 pa_bool_t sample_spec_is_set:1;
250 pa_bool_t channel_map_is_set:1;
252 pa_bool_t volume_is_set:1, volume_factor_is_set:1;
253 pa_bool_t muted_is_set:1;
255 pa_bool_t volume_is_absolute:1;
257 pa_bool_t save_sink:1, save_volume:1, save_muted:1;
258 } pa_sink_input_new_data;
260 pa_sink_input_new_data* pa_sink_input_new_data_init(pa_sink_input_new_data *data);
261 void pa_sink_input_new_data_set_sample_spec(pa_sink_input_new_data *data, const pa_sample_spec *spec);
262 void pa_sink_input_new_data_set_channel_map(pa_sink_input_new_data *data, const pa_channel_map *map);
263 void pa_sink_input_new_data_set_volume(pa_sink_input_new_data *data, const pa_cvolume *volume);
264 void pa_sink_input_new_data_apply_volume_factor(pa_sink_input_new_data *data, const pa_cvolume *volume_factor);
265 void pa_sink_input_new_data_set_muted(pa_sink_input_new_data *data, pa_bool_t mute);
266 void pa_sink_input_new_data_done(pa_sink_input_new_data *data);
268 /* To be called by the implementing module only */
270 int pa_sink_input_new(
273 pa_sink_input_new_data *data,
274 pa_sink_input_flags_t flags);
276 void pa_sink_input_put(pa_sink_input *i);
277 void pa_sink_input_unlink(pa_sink_input* i);
279 void pa_sink_input_set_name(pa_sink_input *i, const char *name);
281 pa_usec_t pa_sink_input_set_requested_latency(pa_sink_input *i, pa_usec_t usec);
283 /* Request that the specified number of bytes already written out to
284 the hw device is rewritten, if possible. Please note that this is
285 only a kind request. The sink driver may not be able to fulfill it
286 fully -- or at all. If the request for a rewrite was successful, the
287 sink driver will call ->rewind() and pass the number of bytes that
288 could be rewound in the HW device. This functionality is required for
289 implementing the "zero latency" write-through functionality. */
290 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);
292 void pa_sink_input_cork(pa_sink_input *i, pa_bool_t b);
294 int pa_sink_input_set_rate(pa_sink_input *i, uint32_t rate);
296 /* Callable by everyone from main thread*/
298 /* External code may request disconnection with this function */
299 void pa_sink_input_kill(pa_sink_input*i);
301 pa_usec_t pa_sink_input_get_latency(pa_sink_input *i, pa_usec_t *sink_latency);
303 void pa_sink_input_set_volume(pa_sink_input *i, const pa_cvolume *volume, pa_bool_t save);
304 const pa_cvolume *pa_sink_input_get_volume(pa_sink_input *i);
305 void pa_sink_input_set_mute(pa_sink_input *i, pa_bool_t mute, pa_bool_t save);
306 pa_bool_t pa_sink_input_get_mute(pa_sink_input *i);
307 void pa_sink_input_update_proplist(pa_sink_input *i, pa_update_mode_t mode, pa_proplist *p);
309 pa_resample_method_t pa_sink_input_get_resample_method(pa_sink_input *i);
311 void pa_sink_input_send_event(pa_sink_input *i, const char *name, pa_proplist *data);
313 int pa_sink_input_move_to(pa_sink_input *i, pa_sink *dest, pa_bool_t save);
314 pa_bool_t pa_sink_input_may_move(pa_sink_input *i); /* may this sink input move at all? */
315 pa_bool_t pa_sink_input_may_move_to(pa_sink_input *i, pa_sink *dest); /* may this sink input move to this sink? */
317 /* The same as pa_sink_input_move_to() but in two seperate steps,
318 * first the detaching from the old sink, then the attaching to the
320 int pa_sink_input_start_move(pa_sink_input *i);
321 int pa_sink_input_finish_move(pa_sink_input *i, pa_sink *dest, pa_bool_t save);
323 pa_sink_input_state_t pa_sink_input_get_state(pa_sink_input *i);
325 pa_usec_t pa_sink_input_get_requested_latency(pa_sink_input *i);
327 /* To be used exclusively by the sink driver IO thread */
329 void pa_sink_input_peek(pa_sink_input *i, size_t length, pa_memchunk *chunk, pa_cvolume *volume);
330 void pa_sink_input_drop(pa_sink_input *i, size_t length);
331 void pa_sink_input_process_rewind(pa_sink_input *i, size_t nbytes /* in the sink's sample spec */);
332 void pa_sink_input_update_max_rewind(pa_sink_input *i, size_t nbytes /* in the sink's sample spec */);
333 void pa_sink_input_update_max_request(pa_sink_input *i, size_t nbytes /* in the sink's sample spec */);
335 void pa_sink_input_set_state_within_thread(pa_sink_input *i, pa_sink_input_state_t state);
337 int pa_sink_input_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offset, pa_memchunk *chunk);
339 pa_usec_t pa_sink_input_set_requested_latency_within_thread(pa_sink_input *i, pa_usec_t usec);
341 pa_bool_t pa_sink_input_safe_to_remove(pa_sink_input *i);
343 pa_memchunk* pa_sink_input_get_silence(pa_sink_input *i, pa_memchunk *ret);