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_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_flags_t;
55 struct pa_source_output {
60 pa_source_output_state_t state;
61 pa_source_output_flags_t flags;
63 char *name, *driver; /* may be NULL */
64 pa_module *module; /* may be NULL */
65 pa_client *client; /* may be NULL */
69 pa_sample_spec sample_spec;
70 pa_channel_map channel_map;
72 /* Pushes a new memchunk into the output. Called from IO thread
74 void (*push)(pa_source_output *o, const pa_memchunk *chunk);
76 /* If non-NULL this function is called when the output is first
77 * connected to a source. Called from IO thread context */
78 void (*attach) (pa_source_output *o); /* may be NULL */
80 /* If non-NULL this function is called when the output is
81 * disconnected from its source. Called from IO thread context */
82 void (*detach) (pa_source_output *o); /* may be NULL */
84 /* If non-NULL called whenever the the source this output is attached
85 * to suspends or resumes. Called from main context */
86 void (*suspend) (pa_source_output *o, int b); /* may be NULL */
88 /* Supposed to unlink and destroy this stream. Called from main
90 void (*kill)(pa_source_output* o); /* may be NULL */
92 /* Return the current latency (i.e. length of bufferd audio) of
93 this stream. Called from main context. If NULL a
94 PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY message is sent to the IO
96 pa_usec_t (*get_latency) (pa_source_output *o); /* may be NULL */
98 pa_resample_method_t resample_method;
101 pa_source_output_state_t state;
103 pa_sample_spec sample_spec;
105 pa_resampler* resampler; /* may be NULL */
111 PA_DECLARE_CLASS(pa_source_output);
112 #define PA_SOURCE_OUTPUT(o) pa_source_output_cast(o)
115 PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY,
116 PA_SOURCE_OUTPUT_MESSAGE_SET_RATE,
117 PA_SOURCE_OUTPUT_MESSAGE_SET_STATE,
118 PA_SOURCE_OUTPUT_MESSAGE_MAX
121 typedef struct pa_source_output_new_data {
122 const char *name, *driver;
128 pa_sample_spec sample_spec;
129 pa_bool_t sample_spec_is_set;
130 pa_channel_map channel_map;
131 pa_bool_t channel_map_is_set;
133 pa_resample_method_t resample_method;
134 } pa_source_output_new_data;
136 pa_source_output_new_data* pa_source_output_new_data_init(pa_source_output_new_data *data);
137 void pa_source_output_new_data_set_sample_spec(pa_source_output_new_data *data, const pa_sample_spec *spec);
138 void pa_source_output_new_data_set_channel_map(pa_source_output_new_data *data, const pa_channel_map *map);
139 void pa_source_output_new_data_set_volume(pa_source_output_new_data *data, const pa_cvolume *volume);
141 /* To be called by the implementing module only */
143 pa_source_output* pa_source_output_new(
145 pa_source_output_new_data *data,
146 pa_source_output_flags_t flags);
148 void pa_source_output_put(pa_source_output *o);
149 void pa_source_output_unlink(pa_source_output*o);
151 void pa_source_output_set_name(pa_source_output *i, const char *name);
153 /* Callable by everyone */
155 /* External code may request disconnection with this funcion */
156 void pa_source_output_kill(pa_source_output*o);
158 pa_usec_t pa_source_output_get_latency(pa_source_output *i);
160 void pa_source_output_cork(pa_source_output *i, pa_bool_t b);
162 int pa_source_output_set_rate(pa_source_output *o, uint32_t rate);
164 pa_resample_method_t pa_source_output_get_resample_method(pa_source_output *o);
166 int pa_source_output_move_to(pa_source_output *o, pa_source *dest);
168 #define pa_source_output_get_state(o) ((o)->state)
170 /* To be used exclusively by the source driver thread */
172 void pa_source_output_push(pa_source_output *o, const pa_memchunk *chunk);
173 int pa_source_output_process_msg(pa_msgobject *mo, int code, void *userdata, int64_t offset, pa_memchunk *chunk);