1 #ifndef foopulsesourceoutputhfoo
2 #define foopulsesourceoutputhfoo
7 This file is part of PulseAudio.
9 Copyright 2004-2006 Lennart Poettering
11 PulseAudio is free software; you can redistribute it and/or modify
12 it under the terms of the GNU Lesser General Public License as published
13 by the Free Software Foundation; either version 2 of the License,
14 or (at your option) any later version.
16 PulseAudio is distributed in the hope that it will be useful, but
17 WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 General Public License for more details.
21 You should have received a copy of the GNU Lesser General Public License
22 along with PulseAudio; if not, write to the Free Software
23 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
29 typedef struct pa_source_output pa_source_output;
31 #include <pulse/sample.h>
32 #include <pulsecore/source.h>
33 #include <pulsecore/memblockq.h>
34 #include <pulsecore/resampler.h>
35 #include <pulsecore/module.h>
36 #include <pulsecore/client.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_flags_t;
60 struct pa_source_output {
66 pa_source_output_state_t state;
67 pa_source_output_flags_t flags;
69 pa_proplist *proplist;
70 char *driver; /* may be NULL */
71 pa_module *module; /* may be NULL */
72 pa_client *client; /* may be NULL */
76 pa_sample_spec sample_spec;
77 pa_channel_map channel_map;
79 pa_resample_method_t resample_method;
81 /* Pushes a new memchunk into the output. Called from IO thread
83 void (*push)(pa_source_output *o, const pa_memchunk *chunk);
85 /* Only relevant for monitor sources right now: called when the
86 * recorded stream is rewound. Called from IO context*/
87 void (*process_rewind)(pa_source_output *o, size_t nbytes);
89 /* Called whenever the maximum rewindable size of the source
90 * changes. Called from IO thread context. */
91 void (*update_max_rewind) (pa_source_output *o, size_t nbytes); /* may be NULL */
93 /* If non-NULL this function is called when the output is first
94 * connected to a source. Called from IO thread context */
95 void (*attach) (pa_source_output *o); /* may be NULL */
97 /* If non-NULL this function is called when the output is
98 * disconnected from its source. Called from IO thread context */
99 void (*detach) (pa_source_output *o); /* may be NULL */
101 /* If non-NULL called whenever the the source this output is attached
102 * to suspends or resumes. Called from main context */
103 void (*suspend) (pa_source_output *o, pa_bool_t b); /* may be NULL */
105 /* If non-NULL called whenever the the source this output is attached
106 * to changes. Called from main context */
107 void (*moved) (pa_source_output *o); /* may be NULL */
109 /* Supposed to unlink and destroy this stream. Called from main
111 void (*kill)(pa_source_output* o); /* may be NULL */
113 /* Return the current latency (i.e. length of bufferd audio) of
114 this stream. Called from main context. If NULL a
115 PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY message is sent to the IO
117 pa_usec_t (*get_latency) (pa_source_output *o); /* may be NULL */
119 /* If non_NULL this function is called from thread context if the
120 * state changes. The old state is found in thread_info.state. */
121 void (*state_change) (pa_source_output *o, pa_source_output_state_t state); /* may be NULL */
124 pa_source_output_state_t state;
126 pa_bool_t attached; /* True only between ->attach() and ->detach() calls */
128 pa_sample_spec sample_spec;
130 pa_resampler* resampler; /* may be NULL */
132 /* We maintain a delay memblockq here for source outputs that
133 * don't implement rewind() */
134 pa_memblockq *delay_memblockq;
136 /* The requested latency for the source */
137 pa_usec_t requested_source_latency;
143 PA_DECLARE_CLASS(pa_source_output);
144 #define PA_SOURCE_OUTPUT(o) pa_source_output_cast(o)
147 PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY,
148 PA_SOURCE_OUTPUT_MESSAGE_SET_RATE,
149 PA_SOURCE_OUTPUT_MESSAGE_SET_STATE,
150 PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY,
151 PA_SOURCE_OUTPUT_MESSAGE_GET_REQUESTED_LATENCY,
152 PA_SOURCE_OUTPUT_MESSAGE_MAX
155 typedef struct pa_source_output_new_data {
156 pa_proplist *proplist;
164 pa_sample_spec sample_spec;
165 pa_bool_t sample_spec_is_set;
166 pa_channel_map channel_map;
167 pa_bool_t channel_map_is_set;
169 pa_resample_method_t resample_method;
170 } pa_source_output_new_data;
172 pa_source_output_new_data* pa_source_output_new_data_init(pa_source_output_new_data *data);
173 void pa_source_output_new_data_set_sample_spec(pa_source_output_new_data *data, const pa_sample_spec *spec);
174 void pa_source_output_new_data_set_channel_map(pa_source_output_new_data *data, const pa_channel_map *map);
175 void pa_source_output_new_data_done(pa_source_output_new_data *data);
177 typedef struct pa_source_output_move_hook_data {
178 pa_source_output *source_output;
179 pa_source *destination;
180 } pa_source_output_move_hook_data;
182 /* To be called by the implementing module only */
184 pa_source_output* pa_source_output_new(
186 pa_source_output_new_data *data,
187 pa_source_output_flags_t flags);
189 void pa_source_output_put(pa_source_output *o);
190 void pa_source_output_unlink(pa_source_output*o);
192 void pa_source_output_set_name(pa_source_output *i, const char *name);
194 pa_usec_t pa_source_output_set_requested_latency(pa_source_output *i, pa_usec_t usec);
196 void pa_source_output_cork(pa_source_output *i, pa_bool_t b);
198 int pa_source_output_set_rate(pa_source_output *o, uint32_t rate);
200 /* Callable by everyone */
202 /* External code may request disconnection with this funcion */
203 void pa_source_output_kill(pa_source_output*o);
205 pa_usec_t pa_source_output_get_latency(pa_source_output *i);
207 pa_resample_method_t pa_source_output_get_resample_method(pa_source_output *o);
209 int pa_source_output_move_to(pa_source_output *o, pa_source *dest);
211 #define pa_source_output_get_state(o) ((o)->state)
213 pa_usec_t pa_source_output_get_requested_latency(pa_source_output *o);
215 /* To be used exclusively by the source driver thread */
217 void pa_source_output_push(pa_source_output *o, const pa_memchunk *chunk);
218 void pa_source_output_process_rewind(pa_source_output *o, size_t nbytes);
219 void pa_source_output_update_max_rewind(pa_source_output *o, size_t nbytes);
221 void pa_source_output_set_state_within_thread(pa_source_output *o, pa_source_output_state_t state);
223 int pa_source_output_process_msg(pa_msgobject *mo, int code, void *userdata, int64_t offset, pa_memchunk *chunk);
225 pa_usec_t pa_source_output_set_requested_latency_within_thread(pa_source_output *o, pa_usec_t usec);