1 #ifndef foopulsesinkinputhfoo
2 #define foopulsesinkinputhfoo
7 This file is part of PulseAudio.
9 Copyright 2004-2006 Lennart Poettering
10 Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
12 PulseAudio is free software; you can redistribute it and/or modify
13 it under the terms of the GNU Lesser General Public License as published
14 by the Free Software Foundation; either version 2 of the License,
15 or (at your option) any later version.
17 PulseAudio is distributed in the hope that it will be useful, but
18 WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 General Public License for more details.
22 You should have received a copy of the GNU Lesser General Public License
23 along with PulseAudio; if not, write to the Free Software
24 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
30 typedef struct pa_sink_input pa_sink_input;
32 #include <pulse/sample.h>
33 #include <pulsecore/hook-list.h>
34 #include <pulsecore/memblockq.h>
35 #include <pulsecore/resampler.h>
36 #include <pulsecore/module.h>
37 #include <pulsecore/client.h>
38 #include <pulsecore/sink.h>
39 #include <pulsecore/core.h>
41 typedef enum pa_sink_input_state {
42 PA_SINK_INPUT_INIT, /*< The stream is not active yet, because pa_sink_put() has not been called yet */
43 PA_SINK_INPUT_DRAINED, /*< The stream stopped playing because there was no data to play */
44 PA_SINK_INPUT_RUNNING, /*< The stream is alive and kicking */
45 PA_SINK_INPUT_CORKED, /*< The stream was corked on user request */
46 PA_SINK_INPUT_UNLINKED /*< The stream is dead */
47 } pa_sink_input_state_t;
49 static inline int PA_SINK_INPUT_LINKED(pa_sink_input_state_t x) {
50 return x == PA_SINK_INPUT_DRAINED || x == PA_SINK_INPUT_RUNNING || x == PA_SINK_INPUT_CORKED;
53 typedef enum pa_sink_input_flags {
54 PA_SINK_INPUT_VARIABLE_RATE = 1,
55 PA_SINK_INPUT_DONT_MOVE = 2,
56 PA_SINK_INPUT_START_CORKED = 4
57 } pa_sink_input_flags_t;
59 struct pa_sink_input {
65 /* Please note that this state should only be read with
66 * pa_sink_input_get_state(). That function will transparently
67 * merge the thread_info.drained value in. */
68 pa_sink_input_state_t state;
69 pa_sink_input_flags_t flags;
71 char *name, *driver; /* may be NULL */
72 pa_module *module; /* may be NULL */
73 pa_client *client; /* may be NULL */
77 pa_sample_spec sample_spec;
78 pa_channel_map channel_map;
80 pa_sink_input *sync_prev, *sync_next;
85 /* Returns the chunk of audio data (but doesn't drop it
86 * yet!). Returns -1 on failure. Called from IO thread context. If
87 * data needs to be generated from scratch then please in the
88 * specified length. This is an optimization only. If less data is
89 * available, it's fine to return a smaller block. If more data is
90 * already ready, it is better to return the full block.*/
91 int (*peek) (pa_sink_input *i, size_t length, pa_memchunk *chunk);
93 /* Drops the specified number of bytes, usually called right after
94 * peek(), but not necessarily. Called from IO thread context. */
95 void (*drop) (pa_sink_input *i, size_t length);
97 /* If non-NULL this function is called when the input is first
98 * connected to a sink or when the rtpoll/asyncmsgq fields
99 * change. You usually don't need to implement this function
100 * unless you rewrite a sink that is piggy-backed onto
101 * another. Called from IO thread context */
102 void (*attach) (pa_sink_input *i); /* may be NULL */
104 /* If non-NULL this function is called when the output is
105 * disconnected from its sink. Called from IO thread context */
106 void (*detach) (pa_sink_input *i); /* may be NULL */
108 /* If non-NULL called whenever the the sink this input is attached
109 * to suspends or resumes. Called from main context */
110 void (*suspend) (pa_sink_input *i, int b); /* may be NULL */
112 /* Supposed to unlink and destroy this stream. Called from main
114 void (*kill) (pa_sink_input *i); /* 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_SINK_INPUT_MESSAGE_GET_LATENCY message is sent to the IO thread
120 pa_usec_t (*get_latency) (pa_sink_input *i); /* may be NULL */
122 pa_resample_method_t resample_method;
125 pa_sink_input_state_t state;
128 pa_sample_spec sample_spec;
130 pa_memchunk resampled_chunk;
131 pa_resampler *resampler; /* may be NULL */
133 /* Some silence to play before the actual data. This is used to
134 * compensate for latency differences when moving a sink input
135 * "hot" between sinks. */
137 pa_memblock *silence_memblock; /* may be NULL */
139 pa_sink_input *sync_prev, *sync_next;
148 PA_DECLARE_CLASS(pa_sink_input);
149 #define PA_SINK_INPUT(o) pa_sink_input_cast(o)
152 PA_SINK_INPUT_MESSAGE_SET_VOLUME,
153 PA_SINK_INPUT_MESSAGE_SET_MUTE,
154 PA_SINK_INPUT_MESSAGE_GET_LATENCY,
155 PA_SINK_INPUT_MESSAGE_SET_RATE,
156 PA_SINK_INPUT_MESSAGE_SET_STATE,
157 PA_SINK_INPUT_MESSAGE_MAX
160 typedef struct pa_sink_input_new_data {
161 const char *name, *driver;
167 pa_sample_spec sample_spec;
168 int sample_spec_is_set;
169 pa_channel_map channel_map;
170 int channel_map_is_set;
177 pa_resample_method_t resample_method;
179 pa_sink_input *sync_base;
180 } pa_sink_input_new_data;
182 pa_sink_input_new_data* pa_sink_input_new_data_init(pa_sink_input_new_data *data);
183 void pa_sink_input_new_data_set_sample_spec(pa_sink_input_new_data *data, const pa_sample_spec *spec);
184 void pa_sink_input_new_data_set_channel_map(pa_sink_input_new_data *data, const pa_channel_map *map);
185 void pa_sink_input_new_data_set_volume(pa_sink_input_new_data *data, const pa_cvolume *volume);
186 void pa_sink_input_new_data_set_muted(pa_sink_input_new_data *data, int mute);
188 /* To be called by the implementing module only */
190 pa_sink_input* pa_sink_input_new(
192 pa_sink_input_new_data *data,
193 pa_sink_input_flags_t flags);
195 void pa_sink_input_put(pa_sink_input *i);
196 void pa_sink_input_unlink(pa_sink_input* i);
198 void pa_sink_input_set_name(pa_sink_input *i, const char *name);
200 /* Callable by everyone */
202 /* External code may request disconnection with this function */
203 void pa_sink_input_kill(pa_sink_input*i);
205 pa_usec_t pa_sink_input_get_latency(pa_sink_input *i);
207 void pa_sink_input_set_volume(pa_sink_input *i, const pa_cvolume *volume);
208 const pa_cvolume *pa_sink_input_get_volume(pa_sink_input *i);
209 void pa_sink_input_set_mute(pa_sink_input *i, int mute);
210 int pa_sink_input_get_mute(pa_sink_input *i);
212 void pa_sink_input_cork(pa_sink_input *i, int b);
214 int pa_sink_input_set_rate(pa_sink_input *i, uint32_t rate);
216 pa_resample_method_t pa_sink_input_get_resample_method(pa_sink_input *i);
218 int pa_sink_input_move_to(pa_sink_input *i, pa_sink *dest, int immediately);
220 pa_sink_input_state_t pa_sink_input_get_state(pa_sink_input *i);
222 /* To be used exclusively by the sink driver thread */
224 int pa_sink_input_peek(pa_sink_input *i, size_t length, pa_memchunk *chunk, pa_cvolume *volume);
225 void pa_sink_input_drop(pa_sink_input *i, size_t length);
226 int pa_sink_input_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offset, pa_memchunk *chunk);
228 typedef struct pa_sink_input_move_info {
229 pa_sink_input *sink_input;
230 pa_sink_input *ghost_sink_input;
231 pa_memblockq *buffer;
233 } pa_sink_input_move_info;