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 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 source output is moved to a new
 124      * source. Called from main context after the stream was detached
 125      * from the old source and before it is attached to the new
 126      * source. */
 127     void (*moving) (pa_source_output *o, pa_source *dest);   /* may be NULL */
 128
 129     /* Supposed to unlink and destroy this stream. Called from main
 130      * context. */
 131     void (*kill)(pa_source_output* o);              /* may NOT be NULL */
 132
 133     /* Return the current latency (i.e. length of bufferd audio) of
 134     this stream. Called from main context. This is added to what the
 135     PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY message sent to the IO thread
 136     returns */
 137     pa_usec_t (*get_latency) (pa_source_output *o); /* may be NULL */
 138
 139     /* If non-NULL this function is called from thread context if the
 140      * state changes. The old state is found in thread_info.state.  */
 141     void (*state_change) (pa_source_output *o, pa_source_output_state_t state); /* may be NULL */
 142
 143     /* If non-NULL this function is called before this source output
 144      * is moved to a source and if it returns FALSE the move
 145      * will not be allowed */
 146     pa_bool_t (*may_move_to) (pa_source_output *o, pa_source *s); /* may be NULL */
 147
 148     /* If non-NULL this function is used to dispatch asynchronous
 149      * control events. */
 150     void (*send_event)(pa_source_output *o, const char *event, pa_proplist* data);
 151
 152     struct {
 153         pa_source_output_state_t state;
 154
 155         pa_bool_t attached:1; /* True only between ->attach() and ->detach() calls */
 156
 157         pa_sample_spec sample_spec;
 158
 159         pa_resampler* resampler;              /* may be NULL */
 160
 161         /* We maintain a delay memblockq here for source outputs that
 162          * don't implement rewind() */
 163         pa_memblockq *delay_memblockq;
 164
 165         /* The requested latency for the source */
 166         pa_usec_t requested_source_latency;
 167
 168         pa_sink_input *direct_on_input;       /* may be NULL */
 169     } thread_info;
 170
 171     void *userdata;
 172 };
 173
 174 PA_DECLARE_CLASS(pa_source_output);
 175 #define PA_SOURCE_OUTPUT(o) pa_source_output_cast(o)
 176
 177 enum {
 178     PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY,
 179     PA_SOURCE_OUTPUT_MESSAGE_SET_RATE,
 180     PA_SOURCE_OUTPUT_MESSAGE_SET_STATE,
 181     PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY,
 182     PA_SOURCE_OUTPUT_MESSAGE_GET_REQUESTED_LATENCY,
 183     PA_SOURCE_OUTPUT_MESSAGE_MAX
 184 };
 185
 186 typedef struct pa_source_output_send_event_hook_data {
 187     pa_source_output *source_output;
 188     const char *event;
 189     pa_proplist *data;
 190 } pa_source_output_send_event_hook_data;
 191
 192 typedef struct pa_source_output_new_data {
 193     pa_proplist *proplist;
 194     pa_sink_input *direct_on_input;
 195
 196     const char *driver;
 197     pa_module *module;
 198     pa_client *client;
 199
 200     pa_source *source;
 201
 202     pa_resample_method_t resample_method;
 203
 204     pa_sample_spec sample_spec;
 205     pa_channel_map channel_map;
 206
 207     pa_bool_t sample_spec_is_set:1;
 208     pa_bool_t channel_map_is_set:1;
 209
 210     pa_bool_t save_source:1;
 211 } pa_source_output_new_data;
 212
 213 pa_source_output_new_data* pa_source_output_new_data_init(pa_source_output_new_data *data);
 214 void pa_source_output_new_data_set_sample_spec(pa_source_output_new_data *data, const pa_sample_spec *spec);
 215 void pa_source_output_new_data_set_channel_map(pa_source_output_new_data *data, const pa_channel_map *map);
 216 void pa_source_output_new_data_done(pa_source_output_new_data *data);
 217
 218 /* To be called by the implementing module only */
 219
 220 int pa_source_output_new(
 221         pa_source_output**o,
 222         pa_core *core,
 223         pa_source_output_new_data *data,
 224         pa_source_output_flags_t flags);
 225
 226 void pa_source_output_put(pa_source_output *o);
 227 void pa_source_output_unlink(pa_source_output*o);
 228
 229 void pa_source_output_set_name(pa_source_output *o, const char *name);
 230
 231 pa_usec_t pa_source_output_set_requested_latency(pa_source_output *o, pa_usec_t usec);
 232
 233 void pa_source_output_cork(pa_source_output *o, pa_bool_t b);
 234
 235 int pa_source_output_set_rate(pa_source_output *o, uint32_t rate);
 236
 237 /* Callable by everyone */
 238
 239 /* External code may request disconnection with this funcion */
 240 void pa_source_output_kill(pa_source_output*o);
 241
 242 pa_usec_t pa_source_output_get_latency(pa_source_output *o, pa_usec_t *source_latency);
 243
 244 void pa_source_output_update_proplist(pa_source_output *o, pa_update_mode_t mode, pa_proplist *p);
 245
 246 pa_resample_method_t pa_source_output_get_resample_method(pa_source_output *o);
 247
 248 void pa_source_output_send_event(pa_source_output *o, const char *name, pa_proplist *data);
 249
 250 pa_bool_t pa_source_output_may_move(pa_source_output *o);
 251 pa_bool_t pa_source_output_may_move_to(pa_source_output *o, pa_source *dest);
 252 int pa_source_output_move_to(pa_source_output *o, pa_source *dest, pa_bool_t save);
 253
 254 /* The same as pa_source_output_move_to() but in two seperate steps,
 255  * first the detaching from the old source, then the attaching to the
 256  * new source */
 257 int pa_source_output_start_move(pa_source_output *o);
 258 int pa_source_output_finish_move(pa_source_output *o, pa_source *dest, pa_bool_t save);
 259
 260 #define pa_source_output_get_state(o) ((o)->state)
 261
 262 pa_usec_t pa_source_output_get_requested_latency(pa_source_output *o);
 263
 264 /* To be used exclusively by the source driver thread */
 265
 266 void pa_source_output_push(pa_source_output *o, const pa_memchunk *chunk);
 267 void pa_source_output_process_rewind(pa_source_output *o, size_t nbytes);
 268 void pa_source_output_update_max_rewind(pa_source_output *o, size_t nbytes);
 269
 270 void pa_source_output_set_state_within_thread(pa_source_output *o, pa_source_output_state_t state);
 271
 272 int pa_source_output_process_msg(pa_msgobject *mo, int code, void *userdata, int64_t offset, pa_memchunk *chunk);
 273
 274 pa_usec_t pa_source_output_set_requested_latency_within_thread(pa_source_output *o, pa_usec_t usec);
 275
 276 #endif