code.delx.au - pulseaudio/blob - src/pulse/ext-stream-restore.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2008 Lennart Poettering
   5
   6   PulseAudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2.1 of the License,
   9   or (at your option) any later version.
  10
  11   PulseAudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with PulseAudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <pulse/context.h>
  27 #include <pulse/gccmacro.h>
  28 #include <pulse/fork-detect.h>
  29 #include <pulse/operation.h>
  30
  31 #include <pulsecore/macro.h>
  32 #include <pulsecore/pstream-util.h>
  33
  34 #include "internal.h"
  35 #include "ext-stream-restore.h"
  36
  37 enum {
  38     SUBCOMMAND_TEST,
  39     SUBCOMMAND_READ,
  40     SUBCOMMAND_WRITE,
  41     SUBCOMMAND_DELETE,
  42     SUBCOMMAND_SUBSCRIBE,
  43     SUBCOMMAND_EVENT
  44 };
  45
  46 static void ext_stream_restore_test_cb(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) {
  47     pa_operation *o = userdata;
  48     uint32_t version = PA_INVALID_INDEX;
  49
  50     pa_assert(pd);
  51     pa_assert(o);
  52     pa_assert(PA_REFCNT_VALUE(o) >= 1);
  53
  54     if (!o->context)
  55         goto finish;
  56
  57     if (command != PA_COMMAND_REPLY) {
  58         if (pa_context_handle_error(o->context, command, t, FALSE) < 0)
  59             goto finish;
  60
  61     } else if (pa_tagstruct_getu32(t, &version) < 0 ||
  62                !pa_tagstruct_eof(t)) {
  63
  64         pa_context_fail(o->context, PA_ERR_PROTOCOL);
  65         goto finish;
  66     }
  67
  68     if (o->callback) {
  69         pa_ext_stream_restore_test_cb_t cb = (pa_ext_stream_restore_test_cb_t) o->callback;
  70         cb(o->context, version, o->userdata);
  71     }
  72
  73 finish:
  74     pa_operation_done(o);
  75     pa_operation_unref(o);
  76 }
  77
  78 pa_operation *pa_ext_stream_restore_test(
  79         pa_context *c,
  80         pa_ext_stream_restore_test_cb_t cb,
  81         void *userdata) {
  82
  83     uint32_t tag;
  84     pa_operation *o;
  85     pa_tagstruct *t;
  86
  87     pa_assert(c);
  88     pa_assert(PA_REFCNT_VALUE(c) >= 1);
  89
  90     PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED);
  91     PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
  92     PA_CHECK_VALIDITY_RETURN_NULL(c, c->version >= 14, PA_ERR_NOTSUPPORTED);
  93
  94     o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
  95
  96     t = pa_tagstruct_command(c, PA_COMMAND_EXTENSION, &tag);
  97     pa_tagstruct_putu32(t, PA_INVALID_INDEX);
  98     pa_tagstruct_puts(t, "module-stream-restore");
  99     pa_tagstruct_putu32(t, SUBCOMMAND_TEST);
 100     pa_pstream_send_tagstruct(c->pstream, t);
 101     pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, ext_stream_restore_test_cb, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);
 102
 103     return o;
 104 }
 105
 106 static void ext_stream_restore_read_cb(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) {
 107     pa_operation *o = userdata;
 108     int eol = 1;
 109
 110     pa_assert(pd);
 111     pa_assert(o);
 112     pa_assert(PA_REFCNT_VALUE(o) >= 1);
 113
 114     if (!o->context)
 115         goto finish;
 116
 117     if (command != PA_COMMAND_REPLY) {
 118         if (pa_context_handle_error(o->context, command, t, FALSE) < 0)
 119             goto finish;
 120
 121         eol = -1;
 122     } else {
 123
 124         while (!pa_tagstruct_eof(t)) {
 125             pa_ext_stream_restore_info i;
 126             pa_bool_t mute = FALSE;
 127
 128             memset(&i, 0, sizeof(i));
 129
 130             if (pa_tagstruct_gets(t, &i.name) < 0 ||
 131                 pa_tagstruct_get_channel_map(t, &i.channel_map) < 0 ||
 132                 pa_tagstruct_get_cvolume(t, &i.volume) < 0 ||
 133                 pa_tagstruct_gets(t, &i.device) < 0 ||
 134                 pa_tagstruct_get_boolean(t, &mute) < 0) {
 135
 136                 pa_context_fail(o->context, PA_ERR_PROTOCOL);
 137                 goto finish;
 138             }
 139
 140             i.mute = (int) mute;
 141
 142             if (o->callback) {
 143                 pa_ext_stream_restore_read_cb_t cb = (pa_ext_stream_restore_read_cb_t) o->callback;
 144                 cb(o->context, &i, 0, o->userdata);
 145             }
 146         }
 147     }
 148
 149     if (o->callback) {
 150         pa_ext_stream_restore_read_cb_t cb = (pa_ext_stream_restore_read_cb_t) o->callback;
 151         cb(o->context, NULL, eol, o->userdata);
 152     }
 153
 154 finish:
 155     pa_operation_done(o);
 156     pa_operation_unref(o);
 157 }
 158
 159 pa_operation *pa_ext_stream_restore_read(
 160         pa_context *c,
 161         pa_ext_stream_restore_read_cb_t cb,
 162         void *userdata) {
 163
 164     uint32_t tag;
 165     pa_operation *o;
 166     pa_tagstruct *t;
 167
 168     pa_assert(c);
 169     pa_assert(PA_REFCNT_VALUE(c) >= 1);
 170
 171     PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED);
 172     PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
 173     PA_CHECK_VALIDITY_RETURN_NULL(c, c->version >= 14, PA_ERR_NOTSUPPORTED);
 174
 175     o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
 176
 177     t = pa_tagstruct_command(c, PA_COMMAND_EXTENSION, &tag);
 178     pa_tagstruct_putu32(t, PA_INVALID_INDEX);
 179     pa_tagstruct_puts(t, "module-stream-restore");
 180     pa_tagstruct_putu32(t, SUBCOMMAND_READ);
 181     pa_pstream_send_tagstruct(c->pstream, t);
 182     pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, ext_stream_restore_read_cb, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);
 183
 184     return o;
 185 }
 186
 187 pa_operation *pa_ext_stream_restore_write(
 188         pa_context *c,
 189         pa_update_mode_t mode,
 190         const pa_ext_stream_restore_info data[],
 191         unsigned n,
 192         int apply_immediately,
 193         pa_context_success_cb_t cb,
 194         void *userdata) {
 195
 196     uint32_t tag;
 197     pa_operation *o = NULL;
 198     pa_tagstruct *t = NULL;
 199
 200     pa_assert(c);
 201     pa_assert(PA_REFCNT_VALUE(c) >= 1);
 202     pa_assert(mode == PA_UPDATE_MERGE || mode == PA_UPDATE_REPLACE || mode == PA_UPDATE_SET);
 203     pa_assert(data);
 204
 205     PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED);
 206     PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
 207     PA_CHECK_VALIDITY_RETURN_NULL(c, c->version >= 14, PA_ERR_NOTSUPPORTED);
 208
 209     o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
 210
 211     t = pa_tagstruct_command(c, PA_COMMAND_EXTENSION, &tag);
 212     pa_tagstruct_putu32(t, PA_INVALID_INDEX);
 213     pa_tagstruct_puts(t, "module-stream-restore");
 214     pa_tagstruct_putu32(t, SUBCOMMAND_WRITE);
 215
 216     pa_tagstruct_putu32(t, mode);
 217     pa_tagstruct_put_boolean(t, apply_immediately);
 218
 219     for (; n > 0; n--, data++) {
 220         if (!data->name || !*data->name)
 221             goto fail;
 222
 223         pa_tagstruct_puts(t, data->name);
 224
 225         if (data->volume.channels > 0 &&
 226             !pa_cvolume_compatible_with_channel_map(&data->volume, &data->channel_map))
 227             goto fail;
 228
 229         pa_tagstruct_put_channel_map(t, &data->channel_map);
 230         pa_tagstruct_put_cvolume(t, &data->volume);
 231         pa_tagstruct_puts(t, data->device);
 232         pa_tagstruct_put_boolean(t, data->mute);
 233     }
 234
 235     pa_pstream_send_tagstruct(c->pstream, t);
 236     pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, pa_context_simple_ack_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);
 237
 238     return o;
 239
 240 fail:
 241     pa_operation_cancel(o);
 242     pa_operation_unref(o);
 243
 244     pa_tagstruct_free(t);
 245
 246     pa_context_set_error(c, PA_ERR_INVALID);
 247     return NULL;
 248 }
 249
 250 pa_operation *pa_ext_stream_restore_delete(
 251         pa_context *c,
 252         const char *const s[],
 253         pa_context_success_cb_t cb,
 254         void *userdata) {
 255
 256     uint32_t tag;
 257     pa_operation *o = NULL;
 258     pa_tagstruct *t = NULL;
 259     const char *const *k;
 260
 261     pa_assert(c);
 262     pa_assert(PA_REFCNT_VALUE(c) >= 1);
 263     pa_assert(s);
 264
 265     PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED);
 266     PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
 267     PA_CHECK_VALIDITY_RETURN_NULL(c, c->version >= 14, PA_ERR_NOTSUPPORTED);
 268
 269     o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
 270
 271     t = pa_tagstruct_command(c, PA_COMMAND_EXTENSION, &tag);
 272     pa_tagstruct_putu32(t, PA_INVALID_INDEX);
 273     pa_tagstruct_puts(t, "module-stream-restore");
 274     pa_tagstruct_putu32(t, SUBCOMMAND_DELETE);
 275
 276     for (k = s; *k; k++) {
 277         if (!*k || !**k)
 278             goto fail;
 279
 280         pa_tagstruct_puts(t, *k);
 281     }
 282
 283     pa_pstream_send_tagstruct(c->pstream, t);
 284     pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, pa_context_simple_ack_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);
 285
 286     return o;
 287
 288 fail:
 289     pa_operation_cancel(o);
 290     pa_operation_unref(o);
 291
 292     pa_tagstruct_free(t);
 293
 294     pa_context_set_error(c, PA_ERR_INVALID);
 295     return NULL;
 296 }
 297
 298 pa_operation *pa_ext_stream_restore_subscribe(
 299         pa_context *c,
 300         int enable,
 301         pa_context_success_cb_t cb,
 302         void *userdata) {
 303
 304     uint32_t tag;
 305     pa_operation *o;
 306     pa_tagstruct *t;
 307
 308     pa_assert(c);
 309     pa_assert(PA_REFCNT_VALUE(c) >= 1);
 310
 311     PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED);
 312     PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
 313     PA_CHECK_VALIDITY_RETURN_NULL(c, c->version >= 14, PA_ERR_NOTSUPPORTED);
 314
 315     o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
 316
 317     t = pa_tagstruct_command(c, PA_COMMAND_EXTENSION, &tag);
 318     pa_tagstruct_putu32(t, PA_INVALID_INDEX);
 319     pa_tagstruct_puts(t, "module-stream-restore");
 320     pa_tagstruct_putu32(t, SUBCOMMAND_SUBSCRIBE);
 321     pa_tagstruct_put_boolean(t, enable);
 322     pa_pstream_send_tagstruct(c->pstream, t);
 323     pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, pa_context_simple_ack_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);
 324
 325     return o;
 326 }
 327
 328 void pa_ext_stream_restore_set_subscribe_cb(
 329         pa_context *c,
 330         pa_ext_stream_restore_subscribe_cb_t cb,
 331         void *userdata) {
 332
 333     pa_assert(c);
 334     pa_assert(PA_REFCNT_VALUE(c) >= 1);
 335
 336     if (pa_detect_fork())
 337         return;
 338
 339     c->ext_stream_restore.callback = cb;
 340     c->ext_stream_restore.userdata = userdata;
 341 }
 342
 343 void pa_ext_stream_restore_command(pa_context *c, uint32_t tag, pa_tagstruct *t) {
 344     uint32_t subcommand;
 345
 346     pa_assert(c);
 347     pa_assert(PA_REFCNT_VALUE(c) >= 1);
 348     pa_assert(t);
 349
 350     if (pa_tagstruct_getu32(t, &subcommand) < 0 ||
 351         !pa_tagstruct_eof(t)) {
 352
 353         pa_context_fail(c, PA_ERR_PROTOCOL);
 354         return;
 355     }
 356
 357     if (subcommand != SUBCOMMAND_EVENT) {
 358         pa_context_fail(c, PA_ERR_PROTOCOL);
 359         return;
 360     }
 361
 362     if (c->ext_stream_restore.callback)
 363         c->ext_stream_restore.callback(c, c->ext_stream_restore.userdata);
 364 }