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 <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-input.h>
38 typedef enum pa_source_output_state {
39 PA_SOURCE_OUTPUT_INIT,
40 PA_SOURCE_OUTPUT_RUNNING,
41 PA_SOURCE_OUTPUT_CORKED,
42 PA_SOURCE_OUTPUT_UNLINKED
43 } pa_source_output_state_t;
45 static inline pa_bool_t PA_SOURCE_OUTPUT_IS_LINKED(pa_source_output_state_t x) {
46 return x == PA_SOURCE_OUTPUT_RUNNING || x == PA_SOURCE_OUTPUT_CORKED;
49 typedef enum pa_source_output_flags {
50 PA_SOURCE_OUTPUT_VARIABLE_RATE = 1,
51 PA_SOURCE_OUTPUT_DONT_MOVE = 2,
52 PA_SOURCE_OUTPUT_START_CORKED = 4,
53 PA_SOURCE_OUTPUT_NO_REMAP = 8,
54 PA_SOURCE_OUTPUT_NO_REMIX = 16,
55 PA_SOURCE_OUTPUT_FIX_FORMAT = 32,
56 PA_SOURCE_OUTPUT_FIX_RATE = 64,
57 PA_SOURCE_OUTPUT_FIX_CHANNELS = 128,
58 PA_SOURCE_OUTPUT_DONT_INHIBIT_AUTO_SUSPEND = 256,
59 PA_SOURCE_OUTPUT_NO_CREATE_ON_SUSPEND = 512,
60 PA_SOURCE_OUTPUT_KILL_ON_SUSPEND = 1024,
61 PA_SOURCE_OUTPUT_PASSTHROUGH = 2048
62 } pa_source_output_flags_t;
64 struct pa_source_output {
70 pa_source_output_state_t state;
71 pa_source_output_flags_t flags;
73 char *driver; /* may be NULL */
74 pa_proplist *proplist;
76 pa_module *module; /* may be NULL */
77 pa_client *client; /* may be NULL */
79 pa_source *source; /* NULL while being moved */
80 pa_source *destination_source; /* only set by filter sources */
82 /* A source output can monitor just a single input of a sink, in which case we find it here */
83 pa_sink_input *direct_on_input; /* may be NULL */
85 pa_sample_spec sample_spec;
86 pa_channel_map channel_map;
87 pa_format_info *format;
89 /* if TRUE then the source we are connected to is worth
90 * remembering, i.e. was explicitly chosen by the user and not
91 * automatically. module-stream-restore looks for this.*/
92 pa_bool_t save_source:1;
94 pa_resample_method_t requested_resample_method, actual_resample_method;
96 /* Pushes a new memchunk into the output. Called from IO thread
98 void (*push)(pa_source_output *o, const pa_memchunk *chunk); /* may NOT be NULL */
100 /* Only relevant for monitor sources right now: called when the
101 * recorded stream is rewound. Called from IO context */
102 void (*process_rewind)(pa_source_output *o, size_t nbytes); /* may be NULL */
104 /* Called whenever the maximum rewindable size of the source
105 * changes. Called from IO thread context. */
106 void (*update_max_rewind) (pa_source_output *o, size_t nbytes); /* may be NULL */
108 /* Called whenever the configured latency of the source
109 * changes. Called from IO context. */
110 void (*update_source_requested_latency) (pa_source_output *o); /* may be NULL */
112 /* Called whenver the latency range of the source changes. Called
113 * from IO context. */
114 void (*update_source_latency_range) (pa_source_output *o); /* may be NULL */
116 /* Called whenver the fixed latency of the source changes, if there
117 * is one. Called from IO context. */
118 void (*update_source_fixed_latency) (pa_source_output *i); /* may be NULL */
120 /* If non-NULL this function is called when the output is first
121 * connected to a source. Called from IO thread context */
122 void (*attach) (pa_source_output *o); /* may be NULL */
124 /* If non-NULL this function is called when the output is
125 * disconnected from its source. Called from IO thread context */
126 void (*detach) (pa_source_output *o); /* may be NULL */
128 /* If non-NULL called whenever the source this output is attached
129 * to suspends or resumes. Called from main context */
130 void (*suspend) (pa_source_output *o, pa_bool_t b); /* may be NULL */
132 /* If non-NULL called whenever the source this output is attached
133 * to suspends or resumes. Called from IO context */
134 void (*suspend_within_thread) (pa_source_output *o, pa_bool_t b); /* may be NULL */
136 /* If non-NULL called whenever the source output is moved to a new
137 * source. Called from main context after the stream was detached
138 * from the old source and before it is attached to the new
139 * source. If dest is NULL the move was executed in two
140 * phases and the second one failed; the stream will be destroyed
141 * after this call. */
142 void (*moving) (pa_source_output *o, pa_source *dest); /* may be NULL */
144 /* Supposed to unlink and destroy this stream. Called from main
146 void (*kill)(pa_source_output* o); /* may NOT be NULL */
148 /* Return the current latency (i.e. length of bufferd audio) of
149 this stream. Called from main context. This is added to what the
150 PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY message sent to the IO thread
152 pa_usec_t (*get_latency) (pa_source_output *o); /* may be NULL */
154 /* If non-NULL this function is called from thread context if the
155 * state changes. The old state is found in thread_info.state. */
156 void (*state_change) (pa_source_output *o, pa_source_output_state_t state); /* may be NULL */
158 /* If non-NULL this function is called before this source output
159 * is moved to a source and if it returns FALSE the move
160 * will not be allowed */
161 pa_bool_t (*may_move_to) (pa_source_output *o, pa_source *s); /* may be NULL */
163 /* If non-NULL this function is used to dispatch asynchronous
165 void (*send_event)(pa_source_output *o, const char *event, pa_proplist* data);
168 pa_source_output_state_t state;
170 pa_bool_t attached:1; /* True only between ->attach() and ->detach() calls */
172 pa_sample_spec sample_spec;
174 pa_resampler* resampler; /* may be NULL */
176 /* We maintain a delay memblockq here for source outputs that
177 * don't implement rewind() */
178 pa_memblockq *delay_memblockq;
180 /* The requested latency for the source */
181 pa_usec_t requested_source_latency;
183 pa_sink_input *direct_on_input; /* may be NULL */
189 PA_DECLARE_PUBLIC_CLASS(pa_source_output);
190 #define PA_SOURCE_OUTPUT(o) pa_source_output_cast(o)
193 PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY,
194 PA_SOURCE_OUTPUT_MESSAGE_SET_RATE,
195 PA_SOURCE_OUTPUT_MESSAGE_SET_STATE,
196 PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY,
197 PA_SOURCE_OUTPUT_MESSAGE_GET_REQUESTED_LATENCY,
198 PA_SOURCE_OUTPUT_MESSAGE_MAX
201 typedef struct pa_source_output_send_event_hook_data {
202 pa_source_output *source_output;
205 } pa_source_output_send_event_hook_data;
207 typedef struct pa_source_output_new_data {
208 pa_source_output_flags_t flags;
210 pa_proplist *proplist;
211 pa_sink_input *direct_on_input;
218 pa_source *destination_source;
220 pa_resample_method_t resample_method;
222 pa_sample_spec sample_spec;
223 pa_channel_map channel_map;
224 pa_format_info *format;
225 pa_idxset *req_formats;
226 pa_idxset *nego_formats;
228 pa_bool_t sample_spec_is_set:1;
229 pa_bool_t channel_map_is_set:1;
231 pa_bool_t save_source:1;
232 } pa_source_output_new_data;
234 pa_source_output_new_data* pa_source_output_new_data_init(pa_source_output_new_data *data);
235 void pa_source_output_new_data_set_sample_spec(pa_source_output_new_data *data, const pa_sample_spec *spec);
236 void pa_source_output_new_data_set_channel_map(pa_source_output_new_data *data, const pa_channel_map *map);
237 pa_bool_t pa_source_output_new_data_is_passthrough(pa_source_output_new_data *data);
238 pa_bool_t pa_source_output_new_data_set_source(pa_source_output_new_data *data, pa_source *s, pa_bool_t save);
239 pa_bool_t pa_source_output_new_data_set_formats(pa_source_output_new_data *data, pa_idxset *formats);
240 void pa_source_output_new_data_done(pa_source_output_new_data *data);
242 /* To be called by the implementing module only */
244 int pa_source_output_new(
247 pa_source_output_new_data *data);
249 void pa_source_output_put(pa_source_output *o);
250 void pa_source_output_unlink(pa_source_output*o);
252 void pa_source_output_set_name(pa_source_output *o, const char *name);
254 pa_usec_t pa_source_output_set_requested_latency(pa_source_output *o, pa_usec_t usec);
256 void pa_source_output_cork(pa_source_output *o, pa_bool_t b);
258 int pa_source_output_set_rate(pa_source_output *o, uint32_t rate);
260 size_t pa_source_output_get_max_rewind(pa_source_output *o);
262 /* Callable by everyone */
264 /* External code may request disconnection with this funcion */
265 void pa_source_output_kill(pa_source_output*o);
267 pa_usec_t pa_source_output_get_latency(pa_source_output *o, pa_usec_t *source_latency);
269 pa_bool_t pa_source_output_is_passthrough(pa_source_output *o);
271 void pa_source_output_update_proplist(pa_source_output *o, pa_update_mode_t mode, pa_proplist *p);
273 pa_resample_method_t pa_source_output_get_resample_method(pa_source_output *o);
275 void pa_source_output_send_event(pa_source_output *o, const char *name, pa_proplist *data);
277 pa_bool_t pa_source_output_may_move(pa_source_output *o);
278 pa_bool_t pa_source_output_may_move_to(pa_source_output *o, pa_source *dest);
279 int pa_source_output_move_to(pa_source_output *o, pa_source *dest, pa_bool_t save);
281 /* The same as pa_source_output_move_to() but in two seperate steps,
282 * first the detaching from the old source, then the attaching to the
284 int pa_source_output_start_move(pa_source_output *o);
285 int pa_source_output_finish_move(pa_source_output *o, pa_source *dest, pa_bool_t save);
286 void pa_source_output_fail_move(pa_source_output *o);
288 #define pa_source_output_get_state(o) ((o)->state)
290 pa_usec_t pa_source_output_get_requested_latency(pa_source_output *o);
292 /* To be used exclusively by the source driver thread */
294 void pa_source_output_push(pa_source_output *o, const pa_memchunk *chunk);
295 void pa_source_output_process_rewind(pa_source_output *o, size_t nbytes);
296 void pa_source_output_update_max_rewind(pa_source_output *o, size_t nbytes);
298 void pa_source_output_set_state_within_thread(pa_source_output *o, pa_source_output_state_t state);
300 int pa_source_output_process_msg(pa_msgobject *mo, int code, void *userdata, int64_t offset, pa_memchunk *chunk);
302 pa_usec_t pa_source_output_set_requested_latency_within_thread(pa_source_output *o, pa_usec_t usec);
304 #define pa_source_output_assert_io_context(s) \
305 pa_assert(pa_thread_mq_get() || !PA_SOURCE_OUTPUT_IS_LINKED((s)->state))