code.delx.au - pulseaudio/blob - src/pulsecore/sink-input.h

   1 #ifndef foosinkinputhfoo
   2 #define foosinkinputhfoo
   3
   4 /* $Id$ */
   5
   6 /***
   7   This file is part of PulseAudio.
   8
   9   Copyright 2004-2006 Lennart Poettering
  10   Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
  11
  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.
  16
  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.
  21
  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
  25   USA.
  26 ***/
  27
  28 #include <inttypes.h>
  29
  30 typedef struct pa_sink_input pa_sink_input;
  31
  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>
  40
  41 typedef enum pa_sink_input_state {
  42     PA_SINK_INPUT_RUNNING,      /*< The stream is alive and kicking */
  43     PA_SINK_INPUT_DRAINED,      /*< The stream stopped playing because there was no data to play */
  44     PA_SINK_INPUT_CORKED,       /*< The stream was corked on user request */
  45     PA_SINK_INPUT_DISCONNECTED  /*< The stream is dead */
  46 } pa_sink_input_state_t;
  47
  48 typedef enum pa_sink_input_flags {
  49     PA_SINK_INPUT_VARIABLE_RATE = 1,
  50     PA_SINK_INPUT_NO_HOOKS = 2
  51 } pa_sink_input_flags_t;
  52
  53 struct pa_sink_input {
  54     int ref;
  55     uint32_t index;
  56     pa_sink_input_state_t state;
  57     pa_sink_input_flags_t flags;
  58
  59     char *name, *driver;                /* may be NULL */
  60     pa_module *module;                  /* may be NULL */
  61     pa_client *client;                  /* may be NULL */
  62
  63     pa_sink *sink;
  64
  65     pa_sample_spec sample_spec;
  66     pa_channel_map channel_map;
  67     pa_cvolume volume;
  68
  69     /* Some silence to play before the actual data. This is used to
  70      * compensate for latency differences when moving a sink input
  71      * "hot" between sinks. */
  72     size_t move_silence;
  73
  74     int (*peek) (pa_sink_input *i, pa_memchunk *chunk);
  75     void (*drop) (pa_sink_input *i, const pa_memchunk *chunk, size_t length);
  76     void (*kill) (pa_sink_input *i);             /* may be NULL */
  77     pa_usec_t (*get_latency) (pa_sink_input *i); /* may be NULL */
  78     void (*underrun) (pa_sink_input *i);         /* may be NULL */
  79
  80     void *userdata;
  81
  82     pa_memchunk resampled_chunk;
  83     pa_resampler *resampler;                     /* may be NULL */
  84
  85     pa_resample_method_t resample_method;
  86
  87     pa_memblock *silence_memblock;               /* may be NULL */
  88 };
  89
  90 typedef struct pa_sink_input_new_data {
  91     const char *name, *driver;
  92     pa_module *module;
  93     pa_client *client;
  94
  95     pa_sink *sink;
  96
  97     pa_sample_spec sample_spec;
  98     int sample_spec_is_set;
  99     pa_channel_map channel_map;
 100     int channel_map_is_set;
 101     pa_cvolume volume;
 102     int volume_is_set;
 103
 104     pa_resample_method_t resample_method;
 105 } pa_sink_input_new_data;
 106
 107 pa_sink_input_new_data* pa_sink_input_new_data_init(pa_sink_input_new_data *data);
 108 void pa_sink_input_new_data_set_sample_spec(pa_sink_input_new_data *data, const pa_sample_spec *spec);
 109 void pa_sink_input_new_data_set_channel_map(pa_sink_input_new_data *data, const pa_channel_map *map);
 110 void pa_sink_input_new_data_set_volume(pa_sink_input_new_data *data, const pa_cvolume *volume);
 111
 112 pa_sink_input* pa_sink_input_new(
 113         pa_core *core,
 114         pa_sink_input_new_data *data,
 115         pa_sink_input_flags_t flags);
 116
 117 void pa_sink_input_unref(pa_sink_input* i);
 118 pa_sink_input* pa_sink_input_ref(pa_sink_input* i);
 119
 120 /* To be called by the implementing module only */
 121 void pa_sink_input_disconnect(pa_sink_input* i);
 122
 123 /* External code may request disconnection with this funcion */
 124 void pa_sink_input_kill(pa_sink_input*i);
 125
 126 pa_usec_t pa_sink_input_get_latency(pa_sink_input *i);
 127
 128 int pa_sink_input_peek(pa_sink_input *i, pa_memchunk *chunk, pa_cvolume *volume);
 129 void pa_sink_input_drop(pa_sink_input *i, const pa_memchunk *chunk, size_t length);
 130
 131 void pa_sink_input_set_volume(pa_sink_input *i, const pa_cvolume *volume);
 132 const pa_cvolume * pa_sink_input_get_volume(pa_sink_input *i);
 133
 134 void pa_sink_input_cork(pa_sink_input *i, int b);
 135
 136 void pa_sink_input_set_rate(pa_sink_input *i, uint32_t rate);
 137
 138 void pa_sink_input_set_name(pa_sink_input *i, const char *name);
 139
 140 pa_resample_method_t pa_sink_input_get_resample_method(pa_sink_input *i);
 141
 142 int pa_sink_input_move_to(pa_sink_input *i, pa_sink *dest, int immediately);
 143
 144 #endif