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internal.h

#ifndef foointernalhfoo
#define foointernalhfoo

/* $Id: internal.h 1426 2007-02-13 15:35:19Z ossman $ */

/***
  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 <pulse/mainloop-api.h>
#include <pulse/context.h>
#include <pulse/stream.h>
#include <pulse/operation.h>
#include <pulse/subscribe.h>

#include <pulsecore/socket-client.h>
#include <pulsecore/pstream.h>
#include <pulsecore/pdispatch.h>
#include <pulsecore/dynarray.h>
#include <pulsecore/llist.h>
#include <pulsecore/native-common.h>
#include <pulsecore/strlist.h>
#include <pulsecore/mcalign.h>
#include <pulsecore/memblockq.h>
#include <pulsecore/hashmap.h>

#include "client-conf.h"

#define DEFAULT_TIMEOUT (30)

struct pa_context {
    int ref;

    char *name;
    pa_mainloop_api* mainloop;

    pa_socket_client *client;
    pa_pstream *pstream;
    pa_pdispatch *pdispatch;

    pa_dynarray *record_streams, *playback_streams;
    PA_LLIST_HEAD(pa_stream, streams);
    PA_LLIST_HEAD(pa_operation, operations);

    uint32_t version;
    uint32_t ctag;
    uint32_t csyncid;
    uint32_t error;
    pa_context_state_t state;

    pa_context_notify_cb_t state_callback;
    void *state_userdata;

    pa_context_subscribe_cb_t subscribe_callback;
    void *subscribe_userdata;

    pa_mempool *mempool;

    int is_local;
    int do_autospawn;
    int autospawn_lock_fd;
    pa_spawn_api spawn_api;

    pa_strlist *server_list;

    char *server;

    pa_client_conf *conf;
};

#define PA_MAX_WRITE_INDEX_CORRECTIONS 10

typedef struct pa_index_correction {
    uint32_t tag;
    int valid;
    int64_t value;
    int absolute, corrupt;
} pa_index_correction;

struct pa_stream {
    int ref;
    pa_context *context;
    pa_mainloop_api *mainloop;
    PA_LLIST_FIELDS(pa_stream);

    char *name;
    pa_buffer_attr buffer_attr;
    pa_sample_spec sample_spec;
    pa_channel_map channel_map;
    pa_stream_flags_t flags;
    uint32_t channel;
    uint32_t syncid;
    int channel_valid;
    uint32_t device_index;
    pa_stream_direction_t direction;
    pa_stream_state_t state;

    uint32_t requested_bytes;

    pa_memchunk peek_memchunk;
    pa_memblockq *record_memblockq;

    int corked;

    /* Store latest latency info */
    pa_timing_info timing_info;
    int timing_info_valid;

    /* Use to make sure that time advances monotonically */
    pa_usec_t previous_time;

    /* time updates with tags older than these are invalid */
    uint32_t write_index_not_before;
    uint32_t read_index_not_before;

    /* Data about individual timing update correctoins */
    pa_index_correction write_index_corrections[PA_MAX_WRITE_INDEX_CORRECTIONS];
    int current_write_index_correction;

    /* Latency interpolation stuff */
    pa_time_event *auto_timing_update_event;
    int auto_timing_update_requested;

    pa_usec_t cached_time;
    int cached_time_valid;

    /* Callbacks */
    pa_stream_notify_cb_t state_callback;
    void *state_userdata;
    pa_stream_request_cb_t read_callback;
    void *read_userdata;
    pa_stream_request_cb_t write_callback;
    void *write_userdata;
    pa_stream_notify_cb_t overflow_callback;
    void *overflow_userdata;
    pa_stream_notify_cb_t underflow_callback;
    void *underflow_userdata;
    pa_stream_notify_cb_t latency_update_callback;
    void *latency_update_userdata;
};

typedef void (*pa_operation_cb_t)(void);

struct pa_operation {
    int ref;
    pa_context *context;
    pa_stream *stream;

    PA_LLIST_FIELDS(pa_operation);

    pa_operation_state_t state;
    void *userdata;
    pa_operation_cb_t callback;
};

void pa_command_request(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata);
void pa_command_stream_killed(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata);
void pa_command_subscribe_event(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata);
void pa_command_overflow_or_underflow(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata);

pa_operation *pa_operation_new(pa_context *c, pa_stream *s, pa_operation_cb_t callback, void *userdata);
void pa_operation_done(pa_operation *o);

void pa_create_stream_callback(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata);
void pa_stream_disconnect_callback(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata);
void pa_context_simple_ack_callback(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata);
void pa_stream_simple_ack_callback(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata);

void pa_context_fail(pa_context *c, int error);
int pa_context_set_error(pa_context *c, int error);
void pa_context_set_state(pa_context *c, pa_context_state_t st);
int pa_context_handle_error(pa_context *c, uint32_t command, pa_tagstruct *t);
pa_operation* pa_context_send_simple_command(pa_context *c, uint32_t command, void (*internal_callback)(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata), void (*cb)(void), void *userdata);

void pa_stream_set_state(pa_stream *s, pa_stream_state_t st);

pa_tagstruct *pa_tagstruct_command(pa_context *c, uint32_t command, uint32_t *tag);

#define PA_CHECK_VALIDITY(context, expression, error) do { \
        if (!(expression)) \
            return -pa_context_set_error((context), (error)); \
} while(0)


#define PA_CHECK_VALIDITY_RETURN_ANY(context, expression, error, value) do { \
        if (!(expression)) { \
            pa_context_set_error((context), (error)); \
            return value; \
        } \
} while(0)

#define PA_CHECK_VALIDITY_RETURN_NULL(context, expression, error) PA_CHECK_VALIDITY_RETURN_ANY(context, expression, error, NULL)


#endif

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