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_FAIL_ON_SUSPEND = 512
59 } pa_source_output_flags_t;
61 struct pa_source_output {
67 pa_source_output_state_t state;
68 pa_source_output_flags_t flags;
70 char *driver; /* may be NULL */
71 pa_proplist *proplist;
73 pa_module *module; /* may be NULL */
74 pa_client *client; /* may be NULL */
76 pa_source *source; /* NULL while being moved */
78 /* A source output can monitor just a single input of a sink, in which case we find it here */
79 pa_sink_input *direct_on_input; /* may be NULL */
81 pa_sample_spec sample_spec;
82 pa_channel_map channel_map;
84 /* if TRUE then the source we are connected to is worth
85 * remembering, i.e. was explicitly chosen by the user and not
86 * automatically. module-stream-restore looks for this.*/
87 pa_bool_t save_source:1;
89 pa_resample_method_t requested_resample_method, actual_resample_method;
91 /* Pushes a new memchunk into the output. Called from IO thread
93 void (*push)(pa_source_output *o, const pa_memchunk *chunk); /* may NOT be NULL */
95 /* Only relevant for monitor sources right now: called when the
96 * recorded stream is rewound. Called from IO context */
97 void (*process_rewind)(pa_source_output *o, size_t nbytes); /* may be NULL */
99 /* Called whenever the maximum rewindable size of the source
100 * changes. Called from IO thread context. */
101 void (*update_max_rewind) (pa_source_output *o, size_t nbytes); /* may be NULL */
103 /* Called whenever the configured latency of the source
104 * changes. Called from IO context. */
105 void (*update_source_requested_latency) (pa_source_output *o); /* may be NULL */
107 /* Called whenver the latency range of the source changes. Called
108 * from IO context. */
109 void (*update_source_latency_range) (pa_source_output *o); /* may be NULL */
111 /* If non-NULL this function is called when the output is first
112 * connected to a source. Called from IO thread context */
113 void (*attach) (pa_source_output *o); /* may be NULL */
115 /* If non-NULL this function is called when the output is
116 * disconnected from its source. Called from IO thread context */
117 void (*detach) (pa_source_output *o); /* may be NULL */
119 /* If non-NULL called whenever the source this output is attached
120 * to suspends or resumes. Called from main context */
121 void (*suspend) (pa_source_output *o, pa_bool_t b); /* may be NULL */
123 /* If non-NULL called whenever the source this output is attached
124 * to suspends or resumes. Called from IO context */
125 void (*suspend_within_thread) (pa_source_output *o, pa_bool_t b); /* may be NULL */
127 /* If non-NULL called whenever the source output is moved to a new
128 * source. Called from main context after the stream was detached
129 * from the old source and before it is attached to the new
130 * source. If dest is NULL the move was executed in two
131 * phases and the second one failed; the stream will be destroyed
132 * after this call. */
133 void (*moving) (pa_source_output *o, pa_source *dest); /* may be NULL */
135 /* Supposed to unlink and destroy this stream. Called from main
137 void (*kill)(pa_source_output* o); /* may NOT be NULL */
139 /* Return the current latency (i.e. length of bufferd audio) of
140 this stream. Called from main context. This is added to what the
141 PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY message sent to the IO thread
143 pa_usec_t (*get_latency) (pa_source_output *o); /* may be NULL */
145 /* If non-NULL this function is called from thread context if the
146 * state changes. The old state is found in thread_info.state. */
147 void (*state_change) (pa_source_output *o, pa_source_output_state_t state); /* may be NULL */
149 /* If non-NULL this function is called before this source output
150 * is moved to a source and if it returns FALSE the move
151 * will not be allowed */
152 pa_bool_t (*may_move_to) (pa_source_output *o, pa_source *s); /* may be NULL */
154 /* If non-NULL this function is used to dispatch asynchronous
156 void (*send_event)(pa_source_output *o, const char *event, pa_proplist* data);
159 pa_source_output_state_t state;
161 pa_bool_t attached:1; /* True only between ->attach() and ->detach() calls */
163 pa_sample_spec sample_spec;
165 pa_resampler* resampler; /* may be NULL */
167 /* We maintain a delay memblockq here for source outputs that
168 * don't implement rewind() */
169 pa_memblockq *delay_memblockq;
171 /* The requested latency for the source */
172 pa_usec_t requested_source_latency;
174 pa_sink_input *direct_on_input; /* may be NULL */
180 PA_DECLARE_CLASS(pa_source_output);
181 #define PA_SOURCE_OUTPUT(o) pa_source_output_cast(o)
184 PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY,
185 PA_SOURCE_OUTPUT_MESSAGE_SET_RATE,
186 PA_SOURCE_OUTPUT_MESSAGE_SET_STATE,
187 PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY,
188 PA_SOURCE_OUTPUT_MESSAGE_GET_REQUESTED_LATENCY,
189 PA_SOURCE_OUTPUT_MESSAGE_MAX
192 typedef struct pa_source_output_send_event_hook_data {
193 pa_source_output *source_output;
196 } pa_source_output_send_event_hook_data;
198 typedef struct pa_source_output_new_data {
199 pa_proplist *proplist;
200 pa_sink_input *direct_on_input;
208 pa_resample_method_t resample_method;
210 pa_sample_spec sample_spec;
211 pa_channel_map channel_map;
213 pa_bool_t sample_spec_is_set:1;
214 pa_bool_t channel_map_is_set:1;
216 pa_bool_t save_source:1;
217 } pa_source_output_new_data;
219 pa_source_output_new_data* pa_source_output_new_data_init(pa_source_output_new_data *data);
220 void pa_source_output_new_data_set_sample_spec(pa_source_output_new_data *data, const pa_sample_spec *spec);
221 void pa_source_output_new_data_set_channel_map(pa_source_output_new_data *data, const pa_channel_map *map);
222 void pa_source_output_new_data_done(pa_source_output_new_data *data);
224 /* To be called by the implementing module only */
226 int pa_source_output_new(
229 pa_source_output_new_data *data,
230 pa_source_output_flags_t flags);
232 void pa_source_output_put(pa_source_output *o);
233 void pa_source_output_unlink(pa_source_output*o);
235 void pa_source_output_set_name(pa_source_output *o, const char *name);
237 pa_usec_t pa_source_output_set_requested_latency(pa_source_output *o, pa_usec_t usec);
239 void pa_source_output_cork(pa_source_output *o, pa_bool_t b);
241 int pa_source_output_set_rate(pa_source_output *o, uint32_t rate);
243 size_t pa_source_output_get_max_rewind(pa_source_output *o);
245 /* Callable by everyone */
247 /* External code may request disconnection with this funcion */
248 void pa_source_output_kill(pa_source_output*o);
250 pa_usec_t pa_source_output_get_latency(pa_source_output *o, pa_usec_t *source_latency);
252 void pa_source_output_update_proplist(pa_source_output *o, pa_update_mode_t mode, pa_proplist *p);
254 pa_resample_method_t pa_source_output_get_resample_method(pa_source_output *o);
256 void pa_source_output_send_event(pa_source_output *o, const char *name, pa_proplist *data);
258 pa_bool_t pa_source_output_may_move(pa_source_output *o);
259 pa_bool_t pa_source_output_may_move_to(pa_source_output *o, pa_source *dest);
260 int pa_source_output_move_to(pa_source_output *o, pa_source *dest, pa_bool_t save);
262 /* The same as pa_source_output_move_to() but in two seperate steps,
263 * first the detaching from the old source, then the attaching to the
265 int pa_source_output_start_move(pa_source_output *o);
266 int pa_source_output_finish_move(pa_source_output *o, pa_source *dest, pa_bool_t save);
267 void pa_source_output_fail_move(pa_source_output *o);
269 #define pa_source_output_get_state(o) ((o)->state)
271 pa_usec_t pa_source_output_get_requested_latency(pa_source_output *o);
273 /* To be used exclusively by the source driver thread */
275 void pa_source_output_push(pa_source_output *o, const pa_memchunk *chunk);
276 void pa_source_output_process_rewind(pa_source_output *o, size_t nbytes);
277 void pa_source_output_update_max_rewind(pa_source_output *o, size_t nbytes);
279 void pa_source_output_set_state_within_thread(pa_source_output *o, pa_source_output_state_t state);
281 int pa_source_output_process_msg(pa_msgobject *mo, int code, void *userdata, int64_t offset, pa_memchunk *chunk);
283 pa_usec_t pa_source_output_set_requested_latency_within_thread(pa_source_output *o, pa_usec_t usec);
285 #define pa_source_output_assert_io_context(s) \
286 pa_assert(pa_thread_mq_get() || !PA_SOURCE_OUTPUT_IS_LINKED((s)->state))