mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
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24291aff27
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@102 fefdeb5f-60dc-0310-8127-8f9354f1896f
255 lines
7.5 KiB
C
255 lines
7.5 KiB
C
/* $Id$ */
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/***
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This file is part of polypaudio.
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polypaudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published
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by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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polypaudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with polypaudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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#include "pdispatch.h"
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#include "native-common.h"
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/*#define DEBUG_OPCODES*/
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#ifdef DEBUG_OPCODES
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static const char *command_names[PA_COMMAND_MAX] = {
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[PA_COMMAND_ERROR] = "ERROR",
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[PA_COMMAND_TIMEOUT] = "TIMEOUT",
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[PA_COMMAND_REPLY] = "REPLY",
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[PA_COMMAND_CREATE_PLAYBACK_STREAM] = "CREATE_PLAYBACK_STREAM",
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[PA_COMMAND_DELETE_PLAYBACK_STREAM] = "DELETE_PLAYBACK_STREAM",
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[PA_COMMAND_CREATE_RECORD_STREAM] = "CREATE_RECORD_STREAM",
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[PA_COMMAND_DELETE_RECORD_STREAM] = "DELETE_RECORD_STREAM",
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[PA_COMMAND_AUTH] = "AUTH",
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[PA_COMMAND_REQUEST] = "REQUEST",
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[PA_COMMAND_EXIT] = "EXIT",
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[PA_COMMAND_SET_NAME] = "SET_NAME",
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[PA_COMMAND_LOOKUP_SINK] = "LOOKUP_SINK",
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[PA_COMMAND_LOOKUP_SOURCE] = "LOOKUP_SOURCE",
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[PA_COMMAND_DRAIN_PLAYBACK_STREAM] = "DRAIN_PLAYBACK_STREAM",
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[PA_COMMAND_PLAYBACK_STREAM_KILLED] = "PLAYBACK_STREAM_KILLED",
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[PA_COMMAND_RECORD_STREAM_KILLED] = "RECORD_STREAM_KILLED",
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[PA_COMMAND_STAT] = "STAT",
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[PA_COMMAND_GET_PLAYBACK_LATENCY] = "PLAYBACK_LATENCY",
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[PA_COMMAND_CREATE_UPLOAD_STREAM] = "CREATE_UPLOAD_STREAM",
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[PA_COMMAND_DELETE_UPLOAD_STREAM] = "DELETE_UPLOAD_STREAM",
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[PA_COMMAND_FINISH_UPLOAD_STREAM] = "FINISH_UPLOAD_STREAM",
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[PA_COMMAND_PLAY_SAMPLE] = "PLAY_SAMPLE",
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[PA_COMMAND_REMOVE_SAMPLE] = "REMOVE_SAMPLE",
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};
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#endif
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struct reply_info {
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struct pa_pdispatch *pdispatch;
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struct reply_info *next, *previous;
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void (*callback)(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata);
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void *userdata;
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uint32_t tag;
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void *mainloop_timeout;
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int callback_is_running;
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};
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struct pa_pdispatch {
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struct pa_mainloop_api *mainloop;
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const struct pa_pdispatch_command *command_table;
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unsigned n_commands;
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struct reply_info *replies;
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void (*drain_callback)(struct pa_pdispatch *pd, void *userdata);
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void *drain_userdata;
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int in_use, shall_free;
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};
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static void reply_info_free(struct reply_info *r) {
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assert(r && r->pdispatch && r->pdispatch->mainloop);
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if (r->pdispatch)
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r->pdispatch->mainloop->cancel_time(r->pdispatch->mainloop, r->mainloop_timeout);
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if (r->previous)
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r->previous->next = r->next;
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else
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r->pdispatch->replies = r->next;
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if (r->next)
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r->next->previous = r->previous;
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free(r);
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}
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struct pa_pdispatch* pa_pdispatch_new(struct pa_mainloop_api *mainloop, const struct pa_pdispatch_command*table, unsigned entries) {
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struct pa_pdispatch *pd;
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assert(mainloop);
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assert((entries && table) || (!entries && !table));
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pd = malloc(sizeof(struct pa_pdispatch));
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assert(pd);
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pd->mainloop = mainloop;
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pd->command_table = table;
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pd->n_commands = entries;
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pd->replies = NULL;
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pd->drain_callback = NULL;
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pd->drain_userdata = NULL;
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pd->in_use = pd->shall_free = 0;
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return pd;
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}
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void pa_pdispatch_free(struct pa_pdispatch *pd) {
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assert(pd);
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if (pd->in_use) {
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pd->shall_free = 1;
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return;
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}
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while (pd->replies)
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reply_info_free(pd->replies);
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free(pd);
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}
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int pa_pdispatch_run(struct pa_pdispatch *pd, struct pa_packet*packet, void *userdata) {
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uint32_t tag, command;
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struct pa_tagstruct *ts = NULL;
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int ret = -1;
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assert(pd && packet && packet->data && !pd->in_use);
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if (packet->length <= 8)
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goto finish;
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ts = pa_tagstruct_new(packet->data, packet->length);
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assert(ts);
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if (pa_tagstruct_getu32(ts, &command) < 0 ||
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pa_tagstruct_getu32(ts, &tag) < 0)
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goto finish;
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#ifdef DEBUG_OPCODES
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fprintf(stderr, __FILE__": Recieved opcode <%s>\n", command_names[command]);
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#endif
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if (command == PA_COMMAND_ERROR || command == PA_COMMAND_REPLY) {
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struct reply_info *r;
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for (r = pd->replies; r; r = r->next)
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if (r->tag == tag)
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break;
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if (r) {
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pd->in_use = r->callback_is_running = 1;
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assert(r->callback);
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r->callback(r->pdispatch, command, tag, ts, r->userdata);
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pd->in_use = r->callback_is_running = 0;
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reply_info_free(r);
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if (pd->shall_free)
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pa_pdispatch_free(pd);
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else {
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if (pd->drain_callback && !pa_pdispatch_is_pending(pd))
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pd->drain_callback(pd, pd->drain_userdata);
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}
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}
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} else if (pd->command_table && command < pd->n_commands) {
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const struct pa_pdispatch_command *c = pd->command_table+command;
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if (c->proc)
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c->proc(pd, command, tag, ts, userdata);
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} else
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goto finish;
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ret = 0;
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finish:
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if (ts)
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pa_tagstruct_free(ts);
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return ret;
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}
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static void timeout_callback(struct pa_mainloop_api*m, void *id, const struct timeval *tv, void *userdata) {
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struct reply_info*r = userdata;
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assert (r && r->mainloop_timeout == id && r->pdispatch && r->pdispatch->mainloop == m && r->callback);
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r->callback(r->pdispatch, PA_COMMAND_TIMEOUT, r->tag, NULL, r->userdata);
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reply_info_free(r);
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if (r->pdispatch->drain_callback && !pa_pdispatch_is_pending(r->pdispatch))
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r->pdispatch->drain_callback(r->pdispatch, r->pdispatch->drain_userdata);
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}
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void pa_pdispatch_register_reply(struct pa_pdispatch *pd, uint32_t tag, int timeout, void (*cb)(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata), void *userdata) {
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struct reply_info *r;
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struct timeval tv;
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assert(pd && cb);
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r = malloc(sizeof(struct reply_info));
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assert(r);
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r->pdispatch = pd;
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r->callback = cb;
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r->userdata = userdata;
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r->tag = tag;
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r->callback_is_running = 0;
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gettimeofday(&tv, NULL);
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tv.tv_sec += timeout;
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r->mainloop_timeout = pd->mainloop->source_time(pd->mainloop, &tv, timeout_callback, r);
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assert(r->mainloop_timeout);
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r->previous = NULL;
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r->next = pd->replies;
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if (r->next)
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r->next->previous = r;
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pd->replies = r;
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}
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int pa_pdispatch_is_pending(struct pa_pdispatch *pd) {
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assert(pd);
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return !!pd->replies;
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}
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void pa_pdispatch_set_drain_callback(struct pa_pdispatch *pd, void (*cb)(struct pa_pdispatch *pd, void *userdata), void *userdata) {
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assert(pd);
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assert(!cb || pa_pdispatch_is_pending(pd));
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pd->drain_callback = cb;
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pd->drain_userdata = userdata;
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}
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void pa_pdispatch_unregister_reply(struct pa_pdispatch *pd, void *userdata) {
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struct reply_info *r, *n;
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assert(pd);
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for (r = pd->replies; r; r = n) {
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n = r->next;
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if (!r->callback_is_running && r->userdata == userdata) /* when this item's callback is currently running it is destroyed anyway in the very near future */
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reply_info_free(r);
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}
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}
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