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, write to the Free Software
21 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
27 typedef struct pa_source_output pa_source_output;
29 #include <pulse/sample.h>
30 #include <pulsecore/source.h>
31 #include <pulsecore/memblockq.h>
32 #include <pulsecore/resampler.h>
33 #include <pulsecore/module.h>
34 #include <pulsecore/client.h>
35 #include <pulsecore/sink-input.h>
37 typedef enum pa_source_output_state {
38 PA_SOURCE_OUTPUT_INIT,
39 PA_SOURCE_OUTPUT_RUNNING,
40 PA_SOURCE_OUTPUT_CORKED,
41 PA_SOURCE_OUTPUT_UNLINKED
42 } pa_source_output_state_t;
44 static inline pa_bool_t PA_SOURCE_OUTPUT_IS_LINKED(pa_source_output_state_t x) {
45 return x == PA_SOURCE_OUTPUT_RUNNING || x == PA_SOURCE_OUTPUT_CORKED;
48 typedef enum pa_source_output_flags {
49 PA_SOURCE_OUTPUT_VARIABLE_RATE = 1,
50 PA_SOURCE_OUTPUT_DONT_MOVE = 2,
51 PA_SOURCE_OUTPUT_START_CORKED = 4,
52 PA_SOURCE_OUTPUT_NO_REMAP = 8,
53 PA_SOURCE_OUTPUT_NO_REMIX = 16,
54 PA_SOURCE_OUTPUT_FIX_FORMAT = 32,
55 PA_SOURCE_OUTPUT_FIX_RATE = 64,
56 PA_SOURCE_OUTPUT_FIX_CHANNELS = 128,
57 PA_SOURCE_OUTPUT_DONT_INHIBIT_AUTO_SUSPEND = 256,
58 PA_SOURCE_OUTPUT_NO_CREATE_ON_SUSPEND = 512,
59 PA_SOURCE_OUTPUT_KILL_ON_SUSPEND = 1024
60 } pa_source_output_flags_t;
62 struct pa_source_output {
68 pa_source_output_state_t state;
69 pa_source_output_flags_t flags;
71 char *driver; /* may be NULL */
72 pa_proplist *proplist;
74 pa_module *module; /* may be NULL */
75 pa_client *client; /* may be NULL */
77 pa_source *source; /* NULL while being moved */
79 /* A source output can monitor just a single input of a sink, in which case we find it here */
80 pa_sink_input *direct_on_input; /* may be NULL */
82 pa_sample_spec sample_spec;
83 pa_channel_map channel_map;
85 /* if TRUE then the source we are connected to is worth
86 * remembering, i.e. was explicitly chosen by the user and not
87 * automatically. module-stream-restore looks for this.*/
88 pa_bool_t save_source:1;
90 pa_resample_method_t requested_resample_method, actual_resample_method;
92 /* Pushes a new memchunk into the output. Called from IO thread
94 void (*push)(pa_source_output *o, const pa_memchunk *chunk); /* may NOT be NULL */
96 /* Only relevant for monitor sources right now: called when the
97 * recorded stream is rewound. Called from IO context */
98 void (*process_rewind)(pa_source_output *o, size_t nbytes); /* may be NULL */
100 /* Called whenever the maximum rewindable size of the source
101 * changes. Called from IO thread context. */
102 void (*update_max_rewind) (pa_source_output *o, size_t nbytes); /* may be NULL */
104 /* Called whenever the configured latency of the source
105 * changes. Called from IO context. */
106 void (*update_source_requested_latency) (pa_source_output *o); /* may be NULL */
108 /* Called whenver the latency range of the source changes. Called
109 * from IO context. */
110 void (*update_source_latency_range) (pa_source_output *o); /* may be NULL */
112 /* Called whenver the fixed latency of the source changes, if there
113 * is one. Called from IO context. */
114 void (*update_source_fixed_latency) (pa_source_output *i); /* may be NULL */
116 /* If non-NULL this function is called when the output is first
117 * connected to a source. Called from IO thread context */
118 void (*attach) (pa_source_output *o); /* may be NULL */
120 /* If non-NULL this function is called when the output is
121 * disconnected from its source. Called from IO thread context */
122 void (*detach) (pa_source_output *o); /* may be NULL */
124 /* If non-NULL called whenever the source this output is attached
125 * to suspends or resumes. Called from main context */
126 void (*suspend) (pa_source_output *o, pa_bool_t b); /* may be NULL */
128 /* If non-NULL called whenever the source this output is attached
129 * to suspends or resumes. Called from IO context */
130 void (*suspend_within_thread) (pa_source_output *o, pa_bool_t b); /* may be NULL */
132 /* If non-NULL called whenever the source output is moved to a new
133 * source. Called from main context after the stream was detached
134 * from the old source and before it is attached to the new
135 * source. If dest is NULL the move was executed in two
136 * phases and the second one failed; the stream will be destroyed
137 * after this call. */
138 void (*moving) (pa_source_output *o, pa_source *dest); /* may be NULL */
140 /* Supposed to unlink and destroy this stream. Called from main
142 void (*kill)(pa_source_output* o); /* may NOT be NULL */
144 /* Return the current latency (i.e. length of bufferd audio) of
145 this stream. Called from main context. This is added to what the
146 PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY message sent to the IO thread
148 pa_usec_t (*get_latency) (pa_source_output *o); /* may be NULL */
150 /* If non-NULL this function is called from thread context if the
151 * state changes. The old state is found in thread_info.state. */
152 void (*state_change) (pa_source_output *o, pa_source_output_state_t state); /* may be NULL */
154 /* If non-NULL this function is called before this source output
155 * is moved to a source and if it returns FALSE the move
156 * will not be allowed */
157 pa_bool_t (*may_move_to) (pa_source_output *o, pa_source *s); /* may be NULL */
159 /* If non-NULL this function is used to dispatch asynchronous
161 void (*send_event)(pa_source_output *o, const char *event, pa_proplist* data);
164 pa_source_output_state_t state;
166 pa_bool_t attached:1; /* True only between ->attach() and ->detach() calls */
168 pa_sample_spec sample_spec;
170 pa_resampler* resampler; /* may be NULL */
172 /* We maintain a delay memblockq here for source outputs that
173 * don't implement rewind() */
174 pa_memblockq *delay_memblockq;
176 /* The requested latency for the source */
177 pa_usec_t requested_source_latency;
179 pa_sink_input *direct_on_input; /* may be NULL */
185 PA_DECLARE_PUBLIC_CLASS(pa_source_output);
186 #define PA_SOURCE_OUTPUT(o) pa_source_output_cast(o)
189 PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY,
190 PA_SOURCE_OUTPUT_MESSAGE_SET_RATE,
191 PA_SOURCE_OUTPUT_MESSAGE_SET_STATE,
192 PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY,
193 PA_SOURCE_OUTPUT_MESSAGE_GET_REQUESTED_LATENCY,
194 PA_SOURCE_OUTPUT_MESSAGE_MAX
197 typedef struct pa_source_output_send_event_hook_data {
198 pa_source_output *source_output;
201 } pa_source_output_send_event_hook_data;
203 typedef struct pa_source_output_new_data {
204 pa_source_output_flags_t flags;
206 pa_proplist *proplist;
207 pa_sink_input *direct_on_input;
215 pa_resample_method_t resample_method;
217 pa_sample_spec sample_spec;
218 pa_channel_map channel_map;
220 pa_bool_t sample_spec_is_set:1;
221 pa_bool_t channel_map_is_set:1;
223 pa_bool_t save_source:1;
224 } pa_source_output_new_data;
226 pa_source_output_new_data* pa_source_output_new_data_init(pa_source_output_new_data *data);
227 void pa_source_output_new_data_set_sample_spec(pa_source_output_new_data *data, const pa_sample_spec *spec);
228 void pa_source_output_new_data_set_channel_map(pa_source_output_new_data *data, const pa_channel_map *map);
229 void pa_source_output_new_data_done(pa_source_output_new_data *data);
231 /* To be called by the implementing module only */
233 int pa_source_output_new(
236 pa_source_output_new_data *data);
238 void pa_source_output_put(pa_source_output *o);
239 void pa_source_output_unlink(pa_source_output*o);
241 void pa_source_output_set_name(pa_source_output *o, const char *name);
243 pa_usec_t pa_source_output_set_requested_latency(pa_source_output *o, pa_usec_t usec);
245 void pa_source_output_cork(pa_source_output *o, pa_bool_t b);
247 int pa_source_output_set_rate(pa_source_output *o, uint32_t rate);
249 size_t pa_source_output_get_max_rewind(pa_source_output *o);
251 /* Callable by everyone */
253 /* External code may request disconnection with this funcion */
254 void pa_source_output_kill(pa_source_output*o);
256 pa_usec_t pa_source_output_get_latency(pa_source_output *o, pa_usec_t *source_latency);
258 void pa_source_output_update_proplist(pa_source_output *o, pa_update_mode_t mode, pa_proplist *p);
260 pa_resample_method_t pa_source_output_get_resample_method(pa_source_output *o);
262 void pa_source_output_send_event(pa_source_output *o, const char *name, pa_proplist *data);
264 pa_bool_t pa_source_output_may_move(pa_source_output *o);
265 pa_bool_t pa_source_output_may_move_to(pa_source_output *o, pa_source *dest);
266 int pa_source_output_move_to(pa_source_output *o, pa_source *dest, pa_bool_t save);
268 /* The same as pa_source_output_move_to() but in two seperate steps,
269 * first the detaching from the old source, then the attaching to the
271 int pa_source_output_start_move(pa_source_output *o);
272 int pa_source_output_finish_move(pa_source_output *o, pa_source *dest, pa_bool_t save);
273 void pa_source_output_fail_move(pa_source_output *o);
275 #define pa_source_output_get_state(o) ((o)->state)
277 pa_usec_t pa_source_output_get_requested_latency(pa_source_output *o);
279 /* To be used exclusively by the source driver thread */
281 void pa_source_output_push(pa_source_output *o, const pa_memchunk *chunk);
282 void pa_source_output_process_rewind(pa_source_output *o, size_t nbytes);
283 void pa_source_output_update_max_rewind(pa_source_output *o, size_t nbytes);
285 void pa_source_output_set_state_within_thread(pa_source_output *o, pa_source_output_state_t state);
287 int pa_source_output_process_msg(pa_msgobject *mo, int code, void *userdata, int64_t offset, pa_memchunk *chunk);
289 pa_usec_t pa_source_output_set_requested_latency_within_thread(pa_source_output *o, pa_usec_t usec);
291 #define pa_source_output_assert_io_context(s) \
292 pa_assert(pa_thread_mq_get() || !PA_SOURCE_OUTPUT_IS_LINKED((s)->state))