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/fork-detect.h>
  28 #include <pulse/operation.h>
  29
  30 #include <pulsecore/macro.h>
  31 #include <pulsecore/pstream-util.h>
  32
  33 #include "internal.h"
  34 #include "ext-stream-restore.h"
  35
  36 enum {
  37     SUBCOMMAND_TEST,
  38     SUBCOMMAND_READ,
  39     SUBCOMMAND_WRITE,
  40     SUBCOMMAND_DELETE,
  41     SUBCOMMAND_SUBSCRIBE,
  42     SUBCOMMAND_EVENT
  43 };
  44
  45 static void ext_stream_restore_test_cb(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) {
  46     pa_operation *o = userdata;
  47     uint32_t version = PA_INVALID_INDEX;
  48
  49     pa_assert(pd);
  50     pa_assert(o);
  51     pa_assert(PA_REFCNT_VALUE(o) >= 1);
  52
  53     if (!o->context)
  54         goto finish;
  55
  56     if (command != PA_COMMAND_REPLY) {
  57         if (pa_context_handle_error(o->context, command, t, false) < 0)
  58             goto finish;
  59
  60     } else if (pa_tagstruct_getu32(t, &version) < 0 ||
  61                !pa_tagstruct_eof(t)) {
  62
  63         pa_context_fail(o->context, PA_ERR_PROTOCOL);
  64         goto finish;
  65     }
  66
  67     if (o->callback) {
  68         pa_ext_stream_restore_test_cb_t cb = (pa_ext_stream_restore_test_cb_t) o->callback;
  69         cb(o->context, version, o->userdata);
  70     }
  71
  72 finish:
  73     pa_operation_done(o);
  74     pa_operation_unref(o);
  75 }
  76
  77 pa_operation *pa_ext_stream_restore_test(
  78         pa_context *c,
  79         pa_ext_stream_restore_test_cb_t cb,
  80         void *userdata) {
  81
  82     uint32_t tag;
  83     pa_operation *o;
  84     pa_tagstruct *t;
  85
  86     pa_assert(c);
  87     pa_assert(PA_REFCNT_VALUE(c) >= 1);
  88
  89     PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED);
  90     PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
  91     PA_CHECK_VALIDITY_RETURN_NULL(c, c->version >= 14, PA_ERR_NOTSUPPORTED);
  92
  93     o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
  94
  95     t = pa_tagstruct_command(c, PA_COMMAND_EXTENSION, &tag);
  96     pa_tagstruct_putu32(t, PA_INVALID_INDEX);
  97     pa_tagstruct_puts(t, "module-stream-restore");
  98     pa_tagstruct_putu32(t, SUBCOMMAND_TEST);
  99     pa_pstream_send_tagstruct(c->pstream, t);
 100     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);
 101
 102     return o;
 103 }
 104
 105 static void ext_stream_restore_read_cb(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) {
 106     pa_operation *o = userdata;
 107     int eol = 1;
 108
 109     pa_assert(pd);
 110     pa_assert(o);
 111     pa_assert(PA_REFCNT_VALUE(o) >= 1);
 112
 113     if (!o->context)
 114         goto finish;
 115
 116     if (command != PA_COMMAND_REPLY) {
 117         if (pa_context_handle_error(o->context, command, t, false) < 0)
 118             goto finish;
 119
 120         eol = -1;
 121     } else {
 122
 123         while (!pa_tagstruct_eof(t)) {
 124             pa_ext_stream_restore_info i;
 125             bool mute = false;
 126
 127             memset(&i, 0, sizeof(i));
 128
 129             if (pa_tagstruct_gets(t, &i.name) < 0 ||
 130                 pa_tagstruct_get_channel_map(t, &i.channel_map) < 0 ||
 131                 pa_tagstruct_get_cvolume(t, &i.volume) < 0 ||
 132                 pa_tagstruct_gets(t, &i.device) < 0 ||
 133                 pa_tagstruct_get_boolean(t, &mute) < 0) {
 134
 135                 pa_context_fail(o->context, PA_ERR_PROTOCOL);
 136                 goto finish;
 137             }
 138
 139             i.mute = (int) mute;
 140
 141             if (o->callback) {
 142                 pa_ext_stream_restore_read_cb_t cb = (pa_ext_stream_restore_read_cb_t) o->callback;
 143                 cb(o->context, &i, 0, o->userdata);
 144             }
 145         }
 146     }
 147
 148     if (o->callback) {
 149         pa_ext_stream_restore_read_cb_t cb = (pa_ext_stream_restore_read_cb_t) o->callback;
 150         cb(o->context, NULL, eol, o->userdata);
 151     }
 152
 153 finish:
 154     pa_operation_done(o);
 155     pa_operation_unref(o);
 156 }
 157
 158 pa_operation *pa_ext_stream_restore_read(
 159         pa_context *c,
 160         pa_ext_stream_restore_read_cb_t cb,
 161         void *userdata) {
 162
 163     uint32_t tag;
 164     pa_operation *o;
 165     pa_tagstruct *t;
 166
 167     pa_assert(c);
 168     pa_assert(PA_REFCNT_VALUE(c) >= 1);
 169
 170     PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED);
 171     PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
 172     PA_CHECK_VALIDITY_RETURN_NULL(c, c->version >= 14, PA_ERR_NOTSUPPORTED);
 173
 174     o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
 175
 176     t = pa_tagstruct_command(c, PA_COMMAND_EXTENSION, &tag);
 177     pa_tagstruct_putu32(t, PA_INVALID_INDEX);
 178     pa_tagstruct_puts(t, "module-stream-restore");
 179     pa_tagstruct_putu32(t, SUBCOMMAND_READ);
 180     pa_pstream_send_tagstruct(c->pstream, t);
 181     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);
 182
 183     return o;
 184 }
 185
 186 pa_operation *pa_ext_stream_restore_write(
 187         pa_context *c,
 188         pa_update_mode_t mode,
 189         const pa_ext_stream_restore_info data[],
 190         unsigned n,
 191         int apply_immediately,
 192         pa_context_success_cb_t cb,
 193         void *userdata) {
 194
 195     uint32_t tag;
 196     pa_operation *o = NULL;
 197     pa_tagstruct *t = NULL;
 198
 199     pa_assert(c);
 200     pa_assert(PA_REFCNT_VALUE(c) >= 1);
 201     pa_assert(mode == PA_UPDATE_MERGE || mode == PA_UPDATE_REPLACE || mode == PA_UPDATE_SET);
 202     pa_assert(data);
 203
 204     PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED);
 205     PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
 206     PA_CHECK_VALIDITY_RETURN_NULL(c, c->version >= 14, PA_ERR_NOTSUPPORTED);
 207
 208     o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
 209
 210     t = pa_tagstruct_command(c, PA_COMMAND_EXTENSION, &tag);
 211     pa_tagstruct_putu32(t, PA_INVALID_INDEX);
 212     pa_tagstruct_puts(t, "module-stream-restore");
 213     pa_tagstruct_putu32(t, SUBCOMMAND_WRITE);
 214
 215     pa_tagstruct_putu32(t, mode);
 216     pa_tagstruct_put_boolean(t, apply_immediately);
 217
 218     for (; n > 0; n--, data++) {
 219         if (!data->name || !*data->name)
 220             goto fail;
 221
 222         pa_tagstruct_puts(t, data->name);
 223
 224         if (data->volume.channels > 0 &&
 225             !pa_cvolume_compatible_with_channel_map(&data->volume, &data->channel_map))
 226             goto fail;
 227
 228         pa_tagstruct_put_channel_map(t, &data->channel_map);
 229         pa_tagstruct_put_cvolume(t, &data->volume);
 230         pa_tagstruct_puts(t, data->device);
 231         pa_tagstruct_put_boolean(t, data->mute);
 232     }
 233
 234     pa_pstream_send_tagstruct(c->pstream, t);
 235     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);
 236
 237     return o;
 238
 239 fail:
 240     pa_operation_cancel(o);
 241     pa_operation_unref(o);
 242
 243     pa_tagstruct_free(t);
 244
 245     pa_context_set_error(c, PA_ERR_INVALID);
 246     return NULL;
 247 }
 248
 249 pa_operation *pa_ext_stream_restore_delete(
 250         pa_context *c,
 251         const char *const s[],
 252         pa_context_success_cb_t cb,
 253         void *userdata) {
 254
 255     uint32_t tag;
 256     pa_operation *o = NULL;
 257     pa_tagstruct *t = NULL;
 258     const char *const *k;
 259
 260     pa_assert(c);
 261     pa_assert(PA_REFCNT_VALUE(c) >= 1);
 262     pa_assert(s);
 263
 264     PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED);
 265     PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
 266     PA_CHECK_VALIDITY_RETURN_NULL(c, c->version >= 14, PA_ERR_NOTSUPPORTED);
 267
 268     o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
 269
 270     t = pa_tagstruct_command(c, PA_COMMAND_EXTENSION, &tag);
 271     pa_tagstruct_putu32(t, PA_INVALID_INDEX);
 272     pa_tagstruct_puts(t, "module-stream-restore");
 273     pa_tagstruct_putu32(t, SUBCOMMAND_DELETE);
 274
 275     for (k = s; *k; k++) {
 276         if (!*k || !**k)
 277             goto fail;
 278
 279         pa_tagstruct_puts(t, *k);
 280     }
 281
 282     pa_pstream_send_tagstruct(c->pstream, t);
 283     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);
 284
 285     return o;
 286
 287 fail:
 288     pa_operation_cancel(o);
 289     pa_operation_unref(o);
 290
 291     pa_tagstruct_free(t);
 292
 293     pa_context_set_error(c, PA_ERR_INVALID);
 294     return NULL;
 295 }
 296
 297 pa_operation *pa_ext_stream_restore_subscribe(
 298         pa_context *c,
 299         int enable,
 300         pa_context_success_cb_t cb,
 301         void *userdata) {
 302
 303     uint32_t tag;
 304     pa_operation *o;
 305     pa_tagstruct *t;
 306
 307     pa_assert(c);
 308     pa_assert(PA_REFCNT_VALUE(c) >= 1);
 309
 310     PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED);
 311     PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
 312     PA_CHECK_VALIDITY_RETURN_NULL(c, c->version >= 14, PA_ERR_NOTSUPPORTED);
 313
 314     o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
 315
 316     t = pa_tagstruct_command(c, PA_COMMAND_EXTENSION, &tag);
 317     pa_tagstruct_putu32(t, PA_INVALID_INDEX);
 318     pa_tagstruct_puts(t, "module-stream-restore");
 319     pa_tagstruct_putu32(t, SUBCOMMAND_SUBSCRIBE);
 320     pa_tagstruct_put_boolean(t, enable);
 321     pa_pstream_send_tagstruct(c->pstream, t);
 322     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);
 323
 324     return o;
 325 }
 326
 327 void pa_ext_stream_restore_set_subscribe_cb(
 328         pa_context *c,
 329         pa_ext_stream_restore_subscribe_cb_t cb,
 330         void *userdata) {
 331
 332     pa_assert(c);
 333     pa_assert(PA_REFCNT_VALUE(c) >= 1);
 334
 335     if (pa_detect_fork())
 336         return;
 337
 338     c->ext_stream_restore.callback = cb;
 339     c->ext_stream_restore.userdata = userdata;
 340 }
 341
 342 void pa_ext_stream_restore_command(pa_context *c, uint32_t tag, pa_tagstruct *t) {
 343     uint32_t subcommand;
 344
 345     pa_assert(c);
 346     pa_assert(PA_REFCNT_VALUE(c) >= 1);
 347     pa_assert(t);
 348
 349     if (pa_tagstruct_getu32(t, &subcommand) < 0 ||
 350         !pa_tagstruct_eof(t)) {
 351
 352         pa_context_fail(c, PA_ERR_PROTOCOL);
 353         return;
 354     }
 355
 356     if (subcommand != SUBCOMMAND_EVENT) {
 357         pa_context_fail(c, PA_ERR_PROTOCOL);
 358         return;
 359     }
 360
 361     if (c->ext_stream_restore.callback)
 362         c->ext_stream_restore.callback(c, c->ext_stream_restore.userdata);
 363 }