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#ifndef foopulsesinkinputhfoo
#define foopulsesinkinputhfoo
/* $Id$ */
/***
This file is part of PulseAudio.
Copyright 2004-2006 Lennart Poettering
Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
PulseAudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with PulseAudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#include <inttypes.h>
typedef struct pa_sink_input pa_sink_input;
#include <pulse/sample.h>
#include <pulsecore/hook-list.h>
#include <pulsecore/memblockq.h>
#include <pulsecore/resampler.h>
#include <pulsecore/module.h>
#include <pulsecore/client.h>
#include <pulsecore/sink.h>
#include <pulsecore/core.h>
typedef enum pa_sink_input_state {
PA_SINK_INPUT_INIT, /*< The stream is not active yet, because pa_sink_put() has not been called yet */
PA_SINK_INPUT_DRAINED, /*< The stream stopped playing because there was no data to play */
PA_SINK_INPUT_RUNNING, /*< The stream is alive and kicking */
PA_SINK_INPUT_CORKED, /*< The stream was corked on user request */
PA_SINK_INPUT_UNLINKED /*< The stream is dead */
} pa_sink_input_state_t;
static inline pa_bool_t PA_SINK_INPUT_LINKED(pa_sink_input_state_t x) {
return x == PA_SINK_INPUT_DRAINED || x == PA_SINK_INPUT_RUNNING || x == PA_SINK_INPUT_CORKED;
}
typedef enum pa_sink_input_flags {
PA_SINK_INPUT_VARIABLE_RATE = 1,
PA_SINK_INPUT_DONT_MOVE = 2,
PA_SINK_INPUT_START_CORKED = 4
} pa_sink_input_flags_t;
struct pa_sink_input {
pa_msgobject parent;
uint32_t index;
pa_core *core;
/* Please note that this state should only be read with
* pa_sink_input_get_state(). That function will transparently
* merge the thread_info.drained value in. */
pa_sink_input_state_t state;
pa_sink_input_flags_t flags;
char *name, *driver; /* may be NULL */
pa_module *module; /* may be NULL */
pa_client *client; /* may be NULL */
pa_sink *sink;
pa_sample_spec sample_spec;
pa_channel_map channel_map;
pa_sink_input *sync_prev, *sync_next;
pa_cvolume volume;
pa_bool_t muted;
/* Returns the chunk of audio data (but doesn't drop it
* yet!). Returns -1 on failure. Called from IO thread context. If
* data needs to be generated from scratch then please in the
* specified length. This is an optimization only. If less data is
* available, it's fine to return a smaller block. If more data is
* already ready, it is better to return the full block.*/
int (*peek) (pa_sink_input *i, size_t length, pa_memchunk *chunk);
/* Drops the specified number of bytes, usually called right after
* peek(), but not necessarily. Called from IO thread context. */
void (*drop) (pa_sink_input *i, size_t length);
/* If non-NULL this function is called when the input is first
* connected to a sink or when the rtpoll/asyncmsgq fields
* change. You usually don't need to implement this function
* unless you rewrite a sink that is piggy-backed onto
* another. Called from IO thread context */
void (*attach) (pa_sink_input *i); /* may be NULL */
/* If non-NULL this function is called when the output is
* disconnected from its sink. Called from IO thread context */
void (*detach) (pa_sink_input *i); /* may be NULL */
/* If non-NULL called whenever the the sink this input is attached
* to suspends or resumes. Called from main context */
void (*suspend) (pa_sink_input *i, int b); /* may be NULL */
/* Supposed to unlink and destroy this stream. Called from main
* context. */
void (*kill) (pa_sink_input *i); /* may be NULL */
/* Return the current latency (i.e. length of bufferd audio) of
this stream. Called from main context. If NULL a
PA_SINK_INPUT_MESSAGE_GET_LATENCY message is sent to the IO thread
instead. */
pa_usec_t (*get_latency) (pa_sink_input *i); /* may be NULL */
pa_resample_method_t resample_method;
struct {
pa_sink_input_state_t state;
pa_atomic_t drained;
pa_bool_t attached; /* True only between ->attach() and ->detach() calls */
pa_sample_spec sample_spec;
pa_memchunk resampled_chunk;
pa_resampler *resampler; /* may be NULL */
/* Some silence to play before the actual data. This is used to
* compensate for latency differences when moving a sink input
* "hot" between sinks. */
size_t move_silence;
pa_memblock *silence_memblock; /* may be NULL */
pa_sink_input *sync_prev, *sync_next;
pa_cvolume volume;
pa_bool_t muted;
} thread_info;
void *userdata;
};
PA_DECLARE_CLASS(pa_sink_input);
#define PA_SINK_INPUT(o) pa_sink_input_cast(o)
enum {
PA_SINK_INPUT_MESSAGE_SET_VOLUME,
PA_SINK_INPUT_MESSAGE_SET_MUTE,
PA_SINK_INPUT_MESSAGE_GET_LATENCY,
PA_SINK_INPUT_MESSAGE_SET_RATE,
PA_SINK_INPUT_MESSAGE_SET_STATE,
PA_SINK_INPUT_MESSAGE_MAX
};
typedef struct pa_sink_input_new_data {
const char *name, *driver;
pa_module *module;
pa_client *client;
pa_sink *sink;
pa_sample_spec sample_spec;
pa_bool_t sample_spec_is_set;
pa_channel_map channel_map;
pa_bool_t channel_map_is_set;
pa_cvolume volume;
pa_bool_t volume_is_set;
pa_bool_t muted;
pa_bool_t muted_is_set;
pa_resample_method_t resample_method;
pa_sink_input *sync_base;
} pa_sink_input_new_data;
pa_sink_input_new_data* pa_sink_input_new_data_init(pa_sink_input_new_data *data);
void pa_sink_input_new_data_set_sample_spec(pa_sink_input_new_data *data, const pa_sample_spec *spec);
void pa_sink_input_new_data_set_channel_map(pa_sink_input_new_data *data, const pa_channel_map *map);
void pa_sink_input_new_data_set_volume(pa_sink_input_new_data *data, const pa_cvolume *volume);
void pa_sink_input_new_data_set_muted(pa_sink_input_new_data *data, pa_bool_t mute);
/* To be called by the implementing module only */
pa_sink_input* pa_sink_input_new(
pa_core *core,
pa_sink_input_new_data *data,
pa_sink_input_flags_t flags);
void pa_sink_input_put(pa_sink_input *i);
void pa_sink_input_unlink(pa_sink_input* i);
void pa_sink_input_set_name(pa_sink_input *i, const char *name);
/* Callable by everyone */
/* External code may request disconnection with this function */
void pa_sink_input_kill(pa_sink_input*i);
pa_usec_t pa_sink_input_get_latency(pa_sink_input *i);
void pa_sink_input_set_volume(pa_sink_input *i, const pa_cvolume *volume);
const pa_cvolume *pa_sink_input_get_volume(pa_sink_input *i);
void pa_sink_input_set_mute(pa_sink_input *i, pa_bool_t mute);
int pa_sink_input_get_mute(pa_sink_input *i);
void pa_sink_input_cork(pa_sink_input *i, pa_bool_t b);
int pa_sink_input_set_rate(pa_sink_input *i, uint32_t rate);
pa_resample_method_t pa_sink_input_get_resample_method(pa_sink_input *i);
int pa_sink_input_move_to(pa_sink_input *i, pa_sink *dest, int immediately);
pa_sink_input_state_t pa_sink_input_get_state(pa_sink_input *i);
/* To be used exclusively by the sink driver thread */
int pa_sink_input_peek(pa_sink_input *i, size_t length, pa_memchunk *chunk, pa_cvolume *volume);
void pa_sink_input_drop(pa_sink_input *i, size_t length);
int pa_sink_input_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offset, pa_memchunk *chunk);
typedef struct pa_sink_input_move_info {
pa_sink_input *sink_input;
pa_sink_input *ghost_sink_input;
pa_memblockq *buffer;
size_t buffer_bytes;
} pa_sink_input_move_info;
#endif
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