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 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
  29 #include <pulsecore/macro.h>
  30 #include <pulsecore/pstream-util.h>
  31
  32 #include "internal.h"
  33 #include "operation.h"
  34
  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, 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             pa_bool_t 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, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
 171     PA_CHECK_VALIDITY_RETURN_NULL(c, c->version >= 14, PA_ERR_NOTSUPPORTED);
 172
 173     o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
 174
 175     t = pa_tagstruct_command(c, PA_COMMAND_EXTENSION, &tag);
 176     pa_tagstruct_putu32(t, PA_INVALID_INDEX);
 177     pa_tagstruct_puts(t, "module-stream-restore");
 178     pa_tagstruct_putu32(t, SUBCOMMAND_READ);
 179     pa_pstream_send_tagstruct(c->pstream, t);
 180     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);
 181
 182     return o;
 183 }
 184
 185 pa_operation *pa_ext_stream_restore_write(
 186         pa_context *c,
 187         pa_update_mode_t mode,
 188         const pa_ext_stream_restore_info data[],
 189         unsigned n,
 190         int apply_immediately,
 191         pa_context_success_cb_t cb,
 192         void *userdata) {
 193
 194     uint32_t tag;
 195     pa_operation *o = NULL;
 196     pa_tagstruct *t = NULL;
 197
 198     pa_assert(c);
 199     pa_assert(PA_REFCNT_VALUE(c) >= 1);
 200     pa_assert(mode == PA_UPDATE_MERGE || mode == PA_UPDATE_REPLACE || mode == PA_UPDATE_SET);
 201     pa_assert(data);
 202
 203     PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
 204     PA_CHECK_VALIDITY_RETURN_NULL(c, c->version >= 14, PA_ERR_NOTSUPPORTED);
 205
 206     o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
 207
 208     t = pa_tagstruct_command(c, PA_COMMAND_EXTENSION, &tag);
 209     pa_tagstruct_putu32(t, PA_INVALID_INDEX);
 210     pa_tagstruct_puts(t, "module-stream-restore");
 211     pa_tagstruct_putu32(t, SUBCOMMAND_WRITE);
 212
 213     pa_tagstruct_putu32(t, mode);
 214     pa_tagstruct_put_boolean(t, apply_immediately);
 215
 216     for (; n > 0; n--, data++) {
 217         if (!data->name || !*data->name)
 218             goto fail;
 219
 220         pa_tagstruct_puts(t, data->name);
 221
 222         if (data->volume.channels > 0 &&
 223             !pa_cvolume_compatible_with_channel_map(&data->volume, &data->channel_map))
 224             goto fail;
 225
 226         pa_tagstruct_put_channel_map(t, &data->channel_map);
 227         pa_tagstruct_put_cvolume(t, &data->volume);
 228         pa_tagstruct_puts(t, data->device);
 229         pa_tagstruct_put_boolean(t, data->mute);
 230     }
 231
 232     pa_pstream_send_tagstruct(c->pstream, t);
 233     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);
 234
 235     return o;
 236
 237 fail:
 238     if (o) {
 239         pa_operation_cancel(o);
 240         pa_operation_unref(o);
 241     }
 242
 243     if (t)
 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, 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     if (o) {
 289         pa_operation_cancel(o);
 290         pa_operation_unref(o);
 291     }
 292
 293     if (t)
 294         pa_tagstruct_free(t);
 295
 296     pa_context_set_error(c, PA_ERR_INVALID);
 297     return NULL;
 298 }
 299
 300 pa_operation *pa_ext_stream_restore_subscribe(
 301         pa_context *c,
 302         int enable,
 303         pa_context_success_cb_t cb,
 304         void *userdata) {
 305
 306     uint32_t tag;
 307     pa_operation *o;
 308     pa_tagstruct *t;
 309
 310     pa_assert(c);
 311     pa_assert(PA_REFCNT_VALUE(c) >= 1);
 312
 313     PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
 314     PA_CHECK_VALIDITY_RETURN_NULL(c, c->version >= 14, PA_ERR_NOTSUPPORTED);
 315
 316     o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata);
 317
 318     t = pa_tagstruct_command(c, PA_COMMAND_EXTENSION, &tag);
 319     pa_tagstruct_putu32(t, PA_INVALID_INDEX);
 320     pa_tagstruct_puts(t, "module-stream-restore");
 321     pa_tagstruct_putu32(t, SUBCOMMAND_SUBSCRIBE);
 322     pa_tagstruct_put_boolean(t, enable);
 323     pa_pstream_send_tagstruct(c->pstream, t);
 324     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);
 325
 326     return o;
 327 }
 328
 329 void pa_ext_stream_restore_set_subscribe_cb(
 330         pa_context *c,
 331         pa_ext_stream_restore_subscribe_cb_t cb,
 332         void *userdata) {
 333
 334     pa_assert(c);
 335     pa_assert(PA_REFCNT_VALUE(c) >= 1);
 336
 337     c->ext_stream_restore.callback = cb;
 338     c->ext_stream_restore.userdata = userdata;
 339 }
 340
 341 void pa_ext_stream_restore_command(pa_context *c, uint32_t tag, pa_tagstruct *t) {
 342     uint32_t subcommand;
 343
 344     pa_assert(c);
 345     pa_assert(PA_REFCNT_VALUE(c) >= 1);
 346     pa_assert(t);
 347
 348     if (pa_tagstruct_getu32(t, &subcommand) < 0 ||
 349         !pa_tagstruct_eof(t)) {
 350
 351         pa_context_fail(c, PA_ERR_PROTOCOL);
 352         return;
 353     }
 354
 355     if (subcommand != SUBCOMMAND_EVENT) {
 356         pa_context_fail(c, PA_ERR_PROTOCOL);
 357         return;
 358     }
 359
 360     if (c->ext_stream_restore.callback)
 361         c->ext_stream_restore.callback(c, c->ext_stream_restore.userdata);
 362 }