code.delx.au - pulseaudio/blob - src/pulsecore/source-output.h

   1 #ifndef foopulsesourceoutputhfoo
   2 #define foopulsesourceoutputhfoo
   3
   4 /***
   5   This file is part of PulseAudio.
   6
   7   Copyright 2004-2006 Lennart Poettering
   8
   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 2.1 of the License,
  12   or (at your option) any later version.
  13
  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.
  18
  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
  22   USA.
  23 ***/
  24
  25 #include <inttypes.h>
  26
  27 typedef struct pa_source_output pa_source_output;
  28
  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>
  36
  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;
  43
  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;
  46 }
  47
  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_FAIL_ON_SUSPEND = 512
  59 } pa_source_output_flags_t;
  60
  61 struct pa_source_output {
  62     pa_msgobject parent;
  63
  64     uint32_t index;
  65     pa_core *core;
  66
  67     pa_source_output_state_t state;
  68     pa_source_output_flags_t flags;
  69
  70     char *driver;                         /* may be NULL */
  71     pa_proplist *proplist;
  72
  73     pa_module *module;                    /* may be NULL */
  74     pa_client *client;                    /* may be NULL */
  75
  76     pa_source *source; /* NULL while being moved */
  77
  78     /* A source output can monitor just a single input of a sink, in which case we find it here */
  79     pa_sink_input *direct_on_input;       /* may be NULL */
  80
  81     pa_sample_spec sample_spec;
  82     pa_channel_map channel_map;
  83
  84     /* if TRUE then the source we are connected to is worth
  85      * remembering, i.e. was explicitly chosen by the user and not
  86      * automatically. module-stream-restore looks for this.*/
  87     pa_bool_t save_source:1;
  88
  89     pa_resample_method_t requested_resample_method, actual_resample_method;
  90
  91     /* Pushes a new memchunk into the output. Called from IO thread
  92      * context. */
  93     void (*push)(pa_source_output *o, const pa_memchunk *chunk); /* may NOT be NULL */
  94
  95     /* Only relevant for monitor sources right now: called when the
  96      * recorded stream is rewound. Called from IO context */
  97     void (*process_rewind)(pa_source_output *o, size_t nbytes); /* may be NULL */
  98
  99     /* Called whenever the maximum rewindable size of the source
 100      * changes. Called from IO thread context. */
 101     void (*update_max_rewind) (pa_source_output *o, size_t nbytes); /* may be NULL */
 102
 103     /* Called whenever the configured latency of the source
 104      * changes. Called from IO context. */
 105     void (*update_source_requested_latency) (pa_source_output *o); /* may be NULL */
 106
 107     /* Called whenver the latency range of the source changes. Called
 108      * from IO context. */
 109     void (*update_source_latency_range) (pa_source_output *o); /* may be NULL */
 110
 111     /* If non-NULL this function is called when the output is first
 112      * connected to a source. Called from IO thread context */
 113     void (*attach) (pa_source_output *o);           /* may be NULL */
 114
 115     /* If non-NULL this function is called when the output is
 116      * disconnected from its source. Called from IO thread context */
 117     void (*detach) (pa_source_output *o);           /* may be NULL */
 118
 119     /* If non-NULL called whenever the the source this output is attached
 120      * to suspends or resumes. Called from main context */
 121     void (*suspend) (pa_source_output *o, pa_bool_t b);   /* may be NULL */
 122
 123     /* If non-NULL called whenever the the source this output is attached
 124      * to changes. Called from main context */
 125     void (*moving) (pa_source_output *o);   /* may be NULL */
 126
 127     /* Supposed to unlink and destroy this stream. Called from main
 128      * context. */
 129     void (*kill)(pa_source_output* o);              /* may NOT be NULL */
 130
 131     /* Return the current latency (i.e. length of bufferd audio) of
 132     this stream. Called from main context. This is added to what the
 133     PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY message sent to the IO thread
 134     returns */
 135     pa_usec_t (*get_latency) (pa_source_output *o); /* may be NULL */
 136
 137     /* If non-NULL this function is called from thread context if the
 138      * state changes. The old state is found in thread_info.state.  */
 139     void (*state_change) (pa_source_output *o, pa_source_output_state_t state); /* may be NULL */
 140
 141     /* If non-NULL this function is called before this source output
 142      * is moved to a source and if it returns FALSE the move
 143      * will not be allowed */
 144     pa_bool_t (*may_move_to) (pa_source_output *o, pa_source *s); /* may be NULL */
 145
 146     /* If non-NULL this function is used to dispatch asynchronous
 147      * control events. */
 148     void (*send_event)(pa_source_output *o, const char *event, pa_proplist* data);
 149
 150     struct {
 151         pa_source_output_state_t state;
 152
 153         pa_bool_t attached:1; /* True only between ->attach() and ->detach() calls */
 154
 155         pa_sample_spec sample_spec;
 156
 157         pa_resampler* resampler;              /* may be NULL */
 158
 159         /* We maintain a delay memblockq here for source outputs that
 160          * don't implement rewind() */
 161         pa_memblockq *delay_memblockq;
 162
 163         /* The requested latency for the source */
 164         pa_usec_t requested_source_latency;
 165
 166         pa_sink_input *direct_on_input;       /* may be NULL */
 167     } thread_info;
 168
 169     void *userdata;
 170 };
 171
 172 PA_DECLARE_CLASS(pa_source_output);
 173 #define PA_SOURCE_OUTPUT(o) pa_source_output_cast(o)
 174
 175 enum {
 176     PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY,
 177     PA_SOURCE_OUTPUT_MESSAGE_SET_RATE,
 178     PA_SOURCE_OUTPUT_MESSAGE_SET_STATE,
 179     PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY,
 180     PA_SOURCE_OUTPUT_MESSAGE_GET_REQUESTED_LATENCY,
 181     PA_SOURCE_OUTPUT_MESSAGE_MAX
 182 };
 183
 184 typedef struct pa_source_output_send_event_hook_data {
 185     pa_source_output *source_output;
 186     const char *event;
 187     pa_proplist *data;
 188 } pa_source_output_send_event_hook_data;
 189
 190 typedef struct pa_source_output_new_data {
 191     pa_proplist *proplist;
 192     pa_sink_input *direct_on_input;
 193
 194     const char *driver;
 195     pa_module *module;
 196     pa_client *client;
 197
 198     pa_source *source;
 199
 200     pa_resample_method_t resample_method;
 201
 202     pa_sample_spec sample_spec;
 203     pa_channel_map channel_map;
 204
 205     pa_bool_t sample_spec_is_set:1;
 206     pa_bool_t channel_map_is_set:1;
 207
 208     pa_bool_t save_source:1;
 209 } pa_source_output_new_data;
 210
 211 pa_source_output_new_data* pa_source_output_new_data_init(pa_source_output_new_data *data);
 212 void pa_source_output_new_data_set_sample_spec(pa_source_output_new_data *data, const pa_sample_spec *spec);
 213 void pa_source_output_new_data_set_channel_map(pa_source_output_new_data *data, const pa_channel_map *map);
 214 void pa_source_output_new_data_done(pa_source_output_new_data *data);
 215
 216 /* To be called by the implementing module only */
 217
 218 int pa_source_output_new(
 219         pa_source_output**o,
 220         pa_core *core,
 221         pa_source_output_new_data *data,
 222         pa_source_output_flags_t flags);
 223
 224 void pa_source_output_put(pa_source_output *o);
 225 void pa_source_output_unlink(pa_source_output*o);
 226
 227 void pa_source_output_set_name(pa_source_output *o, const char *name);
 228
 229 pa_usec_t pa_source_output_set_requested_latency(pa_source_output *o, pa_usec_t usec);
 230
 231 void pa_source_output_cork(pa_source_output *o, pa_bool_t b);
 232
 233 int pa_source_output_set_rate(pa_source_output *o, uint32_t rate);
 234
 235 /* Callable by everyone */
 236
 237 /* External code may request disconnection with this funcion */
 238 void pa_source_output_kill(pa_source_output*o);
 239
 240 pa_usec_t pa_source_output_get_latency(pa_source_output *o, pa_usec_t *source_latency);
 241
 242 void pa_source_output_update_proplist(pa_source_output *o, pa_update_mode_t mode, pa_proplist *p);
 243
 244 pa_resample_method_t pa_source_output_get_resample_method(pa_source_output *o);
 245
 246 void pa_source_output_send_event(pa_source_output *o, const char *name, pa_proplist *data);
 247
 248 pa_bool_t pa_source_output_may_move(pa_source_output *o);
 249 pa_bool_t pa_source_output_may_move_to(pa_source_output *o, pa_source *dest);
 250 int pa_source_output_move_to(pa_source_output *o, pa_source *dest, pa_bool_t save);
 251
 252 /* The same as pa_source_output_move_to() but in two seperate steps,
 253  * first the detaching from the old source, then the attaching to the
 254  * new source */
 255 int pa_source_output_start_move(pa_source_output *o);
 256 int pa_source_output_finish_move(pa_source_output *o, pa_source *dest, pa_bool_t save);
 257
 258 #define pa_source_output_get_state(o) ((o)->state)
 259
 260 pa_usec_t pa_source_output_get_requested_latency(pa_source_output *o);
 261
 262 /* To be used exclusively by the source driver thread */
 263
 264 void pa_source_output_push(pa_source_output *o, const pa_memchunk *chunk);
 265 void pa_source_output_process_rewind(pa_source_output *o, size_t nbytes);
 266 void pa_source_output_update_max_rewind(pa_source_output *o, size_t nbytes);
 267
 268 void pa_source_output_set_state_within_thread(pa_source_output *o, pa_source_output_state_t state);
 269
 270 int pa_source_output_process_msg(pa_msgobject *mo, int code, void *userdata, int64_t offset, pa_memchunk *chunk);
 271
 272 pa_usec_t pa_source_output_set_requested_latency_within_thread(pa_source_output *o, pa_usec_t usec);
 273
 274 #endif