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 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_flags_t;
60 struct pa_source_output {
66 pa_source_output_state_t state;
67 pa_source_output_flags_t flags;
69 char *driver; /* may be NULL */
70 pa_proplist *proplist;
72 pa_module *module; /* may be NULL */
73 pa_client *client; /* may be NULL */
75 pa_source *source; /* NULL while being moved */
77 /* A source output can monitor just a single input of a sink, in which case we find it here */
78 pa_sink_input *direct_on_input; /* may be NULL */
80 pa_sample_spec sample_spec;
81 pa_channel_map channel_map;
83 /* if TRUE then the source we are connected to is worth
84 * remembering, i.e. was explicitly chosen by the user and not
85 * automatically. module-stream-restore looks for this.*/
86 pa_bool_t save_source:1;
88 pa_resample_method_t requested_resample_method, actual_resample_method;
90 /* Pushes a new memchunk into the output. Called from IO thread
92 void (*push)(pa_source_output *o, const pa_memchunk *chunk); /* may NOT be NULL */
94 /* Only relevant for monitor sources right now: called when the
95 * recorded stream is rewound. Called from IO context */
96 void (*process_rewind)(pa_source_output *o, size_t nbytes); /* may be NULL */
98 /* Called whenever the maximum rewindable size of the source
99 * changes. Called from IO thread context. */
100 void (*update_max_rewind) (pa_source_output *o, size_t nbytes); /* may be NULL */
102 /* Called whenever the configured latency of the source
103 * changes. Called from IO context. */
104 void (*update_source_requested_latency) (pa_source_output *o); /* may be NULL */
106 /* Called whenver the latency range of the source changes. Called
107 * from IO context. */
108 void (*update_source_latency_range) (pa_source_output *o); /* may be NULL */
110 /* If non-NULL this function is called when the output is first
111 * connected to a source. Called from IO thread context */
112 void (*attach) (pa_source_output *o); /* may be NULL */
114 /* If non-NULL this function is called when the output is
115 * disconnected from its source. Called from IO thread context */
116 void (*detach) (pa_source_output *o); /* may be NULL */
118 /* If non-NULL called whenever the the source this output is attached
119 * to suspends or resumes. Called from main context */
120 void (*suspend) (pa_source_output *o, pa_bool_t b); /* may be NULL */
122 /* If non-NULL called whenever the the source this output is attached
123 * to changes. Called from main context */
124 void (*moved) (pa_source_output *o); /* may be NULL */
126 /* Supposed to unlink and destroy this stream. Called from main
128 void (*kill)(pa_source_output* o); /* may NOT be NULL */
130 /* Return the current latency (i.e. length of bufferd audio) of
131 this stream. Called from main context. This is added to what the
132 PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY message sent to the IO thread
134 pa_usec_t (*get_latency) (pa_source_output *o); /* may be NULL */
136 /* If non-NULL this function is called from thread context if the
137 * state changes. The old state is found in thread_info.state. */
138 void (*state_change) (pa_source_output *o, pa_source_output_state_t state); /* may be NULL */
140 /* If non-NULL this function is called before this source output
141 * is moved to a source and if it returns FALSE the move
142 * will not be allowed */
143 pa_bool_t (*may_move_to) (pa_source_output *o, pa_source *s); /* may be NULL */
146 pa_source_output_state_t state;
148 pa_bool_t attached:1; /* True only between ->attach() and ->detach() calls */
150 pa_sample_spec sample_spec;
152 pa_resampler* resampler; /* may be NULL */
154 /* We maintain a delay memblockq here for source outputs that
155 * don't implement rewind() */
156 pa_memblockq *delay_memblockq;
158 /* The requested latency for the source */
159 pa_usec_t requested_source_latency;
161 pa_sink_input *direct_on_input; /* may be NULL */
167 PA_DECLARE_CLASS(pa_source_output);
168 #define PA_SOURCE_OUTPUT(o) pa_source_output_cast(o)
171 PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY,
172 PA_SOURCE_OUTPUT_MESSAGE_SET_RATE,
173 PA_SOURCE_OUTPUT_MESSAGE_SET_STATE,
174 PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY,
175 PA_SOURCE_OUTPUT_MESSAGE_GET_REQUESTED_LATENCY,
176 PA_SOURCE_OUTPUT_MESSAGE_MAX
179 typedef struct pa_source_output_new_data {
180 pa_proplist *proplist;
181 pa_sink_input *direct_on_input;
189 pa_resample_method_t resample_method;
191 pa_sample_spec sample_spec;
192 pa_channel_map channel_map;
194 pa_bool_t sample_spec_is_set:1;
195 pa_bool_t channel_map_is_set:1;
197 pa_bool_t save_source:1;
198 } pa_source_output_new_data;
200 pa_source_output_new_data* pa_source_output_new_data_init(pa_source_output_new_data *data);
201 void pa_source_output_new_data_set_sample_spec(pa_source_output_new_data *data, const pa_sample_spec *spec);
202 void pa_source_output_new_data_set_channel_map(pa_source_output_new_data *data, const pa_channel_map *map);
203 void pa_source_output_new_data_done(pa_source_output_new_data *data);
205 /* To be called by the implementing module only */
207 pa_source_output* pa_source_output_new(
209 pa_source_output_new_data *data,
210 pa_source_output_flags_t flags);
212 void pa_source_output_put(pa_source_output *o);
213 void pa_source_output_unlink(pa_source_output*o);
215 void pa_source_output_set_name(pa_source_output *o, const char *name);
217 pa_usec_t pa_source_output_set_requested_latency(pa_source_output *o, pa_usec_t usec);
219 void pa_source_output_cork(pa_source_output *o, pa_bool_t b);
221 int pa_source_output_set_rate(pa_source_output *o, uint32_t rate);
223 /* Callable by everyone */
225 /* External code may request disconnection with this funcion */
226 void pa_source_output_kill(pa_source_output*o);
228 pa_usec_t pa_source_output_get_latency(pa_source_output *o, pa_usec_t *source_latency);
230 pa_bool_t pa_source_output_update_proplist(pa_source_output *o, pa_update_mode_t mode, pa_proplist *p);
232 pa_resample_method_t pa_source_output_get_resample_method(pa_source_output *o);
234 pa_bool_t pa_source_output_may_move(pa_source_output *o);
235 pa_bool_t pa_source_output_may_move_to(pa_source_output *o, pa_source *dest);
236 int pa_source_output_move_to(pa_source_output *o, pa_source *dest, pa_bool_t save);
238 /* The same as pa_source_output_move_to() but in two seperate steps,
239 * first the detaching from the old source, then the attaching to the
241 int pa_source_output_start_move(pa_source_output *o);
242 int pa_source_output_finish_move(pa_source_output *o, pa_source *dest, pa_bool_t save);
244 #define pa_source_output_get_state(o) ((o)->state)
246 pa_usec_t pa_source_output_get_requested_latency(pa_source_output *o);
248 /* To be used exclusively by the source driver thread */
250 void pa_source_output_push(pa_source_output *o, const pa_memchunk *chunk);
251 void pa_source_output_process_rewind(pa_source_output *o, size_t nbytes);
252 void pa_source_output_update_max_rewind(pa_source_output *o, size_t nbytes);
254 void pa_source_output_set_state_within_thread(pa_source_output *o, pa_source_output_state_t state);
256 int pa_source_output_process_msg(pa_msgobject *mo, int code, void *userdata, int64_t offset, pa_memchunk *chunk);
258 pa_usec_t pa_source_output_set_requested_latency_within_thread(pa_source_output *o, pa_usec_t usec);