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 /* A source output can monitor just a single input of a sink, in which case we find it here */
77 pa_sink_input *direct_on_input; /* may be NULL */
79 pa_sample_spec sample_spec;
80 pa_channel_map channel_map;
82 pa_resample_method_t resample_method;
84 /* Pushes a new memchunk into the output. Called from IO thread
86 void (*push)(pa_source_output *o, const pa_memchunk *chunk);
88 /* Only relevant for monitor sources right now: called when the
89 * recorded stream is rewound. Called from IO context*/
90 void (*process_rewind)(pa_source_output *o, size_t nbytes);
92 /* Called whenever the maximum rewindable size of the source
93 * changes. Called from IO thread context. */
94 void (*update_max_rewind) (pa_source_output *o, size_t nbytes); /* may be NULL */
96 /* If non-NULL this function is called when the output is first
97 * connected to a source. Called from IO thread context */
98 void (*attach) (pa_source_output *o); /* may be NULL */
100 /* If non-NULL this function is called when the output is
101 * disconnected from its source. Called from IO thread context */
102 void (*detach) (pa_source_output *o); /* may be NULL */
104 /* If non-NULL called whenever the the source this output is attached
105 * to suspends or resumes. Called from main context */
106 void (*suspend) (pa_source_output *o, pa_bool_t b); /* may be NULL */
108 /* If non-NULL called whenever the the source this output is attached
109 * to changes. Called from main context */
110 void (*moved) (pa_source_output *o); /* may be NULL */
112 /* Supposed to unlink and destroy this stream. Called from main
114 void (*kill)(pa_source_output* o); /* may be NULL */
116 /* Return the current latency (i.e. length of bufferd audio) of
117 this stream. Called from main context. If NULL a
118 PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY message is sent to the IO
120 pa_usec_t (*get_latency) (pa_source_output *o); /* may be NULL */
122 /* If non_NULL this function is called from thread context if the
123 * state changes. The old state is found in thread_info.state. */
124 void (*state_change) (pa_source_output *o, pa_source_output_state_t state); /* may be NULL */
127 pa_source_output_state_t state;
129 pa_bool_t attached; /* True only between ->attach() and ->detach() calls */
131 pa_sample_spec sample_spec;
133 pa_resampler* resampler; /* may be NULL */
135 /* We maintain a delay memblockq here for source outputs that
136 * don't implement rewind() */
137 pa_memblockq *delay_memblockq;
139 /* The requested latency for the source */
140 pa_usec_t requested_source_latency;
142 pa_sink_input *direct_on_input; /* may be NULL */
148 PA_DECLARE_CLASS(pa_source_output);
149 #define PA_SOURCE_OUTPUT(o) pa_source_output_cast(o)
152 PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY,
153 PA_SOURCE_OUTPUT_MESSAGE_SET_RATE,
154 PA_SOURCE_OUTPUT_MESSAGE_SET_STATE,
155 PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY,
156 PA_SOURCE_OUTPUT_MESSAGE_GET_REQUESTED_LATENCY,
157 PA_SOURCE_OUTPUT_MESSAGE_MAX
160 typedef struct pa_source_output_new_data {
161 pa_proplist *proplist;
162 pa_sink_input *direct_on_input;
170 pa_sample_spec sample_spec;
171 pa_bool_t sample_spec_is_set;
172 pa_channel_map channel_map;
173 pa_bool_t channel_map_is_set;
175 pa_resample_method_t resample_method;
176 } pa_source_output_new_data;
178 pa_source_output_new_data* pa_source_output_new_data_init(pa_source_output_new_data *data);
179 void pa_source_output_new_data_set_sample_spec(pa_source_output_new_data *data, const pa_sample_spec *spec);
180 void pa_source_output_new_data_set_channel_map(pa_source_output_new_data *data, const pa_channel_map *map);
181 void pa_source_output_new_data_done(pa_source_output_new_data *data);
183 typedef struct pa_source_output_move_hook_data {
184 pa_source_output *source_output;
185 pa_source *destination;
186 } pa_source_output_move_hook_data;
188 /* To be called by the implementing module only */
190 pa_source_output* pa_source_output_new(
192 pa_source_output_new_data *data,
193 pa_source_output_flags_t flags);
195 void pa_source_output_put(pa_source_output *o);
196 void pa_source_output_unlink(pa_source_output*o);
198 void pa_source_output_set_name(pa_source_output *i, const char *name);
200 pa_usec_t pa_source_output_set_requested_latency(pa_source_output *i, pa_usec_t usec);
202 void pa_source_output_cork(pa_source_output *i, pa_bool_t b);
204 int pa_source_output_set_rate(pa_source_output *o, uint32_t rate);
206 /* Callable by everyone */
208 /* External code may request disconnection with this funcion */
209 void pa_source_output_kill(pa_source_output*o);
211 pa_usec_t pa_source_output_get_latency(pa_source_output *i);
213 pa_resample_method_t pa_source_output_get_resample_method(pa_source_output *o);
215 int pa_source_output_move_to(pa_source_output *o, pa_source *dest);
217 #define pa_source_output_get_state(o) ((o)->state)
219 pa_usec_t pa_source_output_get_requested_latency(pa_source_output *o);
221 /* To be used exclusively by the source driver thread */
223 void pa_source_output_push(pa_source_output *o, const pa_memchunk *chunk);
224 void pa_source_output_process_rewind(pa_source_output *o, size_t nbytes);
225 void pa_source_output_update_max_rewind(pa_source_output *o, size_t nbytes);
227 void pa_source_output_set_state_within_thread(pa_source_output *o, pa_source_output_state_t state);
229 int pa_source_output_process_msg(pa_msgobject *mo, int code, void *userdata, int64_t offset, pa_memchunk *chunk);
231 pa_usec_t pa_source_output_set_requested_latency_within_thread(pa_source_output *o, pa_usec_t usec);