audiod: Allow regular expressions in receiver config.
[paraslash.git] / audiod.c
index 2c27648..1f1f1aa 100644 (file)
--- a/audiod.c
+++ b/audiod.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2011 Andre Noll <maan@systemlinux.org>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
@@ -7,9 +7,7 @@
 /** \file audiod.c the paraslash's audio daemon */
 #include <regex.h>
 #include <sys/types.h>
-#include <dirent.h>
 #include <signal.h>
-#include <openssl/rc4.h>
 #include <stdbool.h>
 
 #include "para.h"
@@ -33,6 +31,7 @@
 #include "write.h"
 #include "write_common.h"
 #include "signal.h"
+#include "version.h"
 
 /** define the array of error lists needed by para_audiod */
 INIT_AUDIOD_ERRLISTS;
@@ -92,6 +91,7 @@ struct status_task {
        struct timeval restart_barrier;
        /** Last time we received status data from para_server. */
        struct timeval last_status_read;
+       size_t min_iqs;
        /** The offset value announced by para_server. */
        int offset_seconds;
        /** The length of the current audio file as announced by para_server. */
@@ -166,7 +166,7 @@ struct command_task {
  * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
  * \a name is not a supported audio format.
  */
-int get_audio_format_num(const char *name)
+static int get_audio_format_num(const char *name)
 {
        int i;
 
@@ -178,6 +178,22 @@ int get_audio_format_num(const char *name)
        return -E_UNSUPPORTED_AUDIO_FORMAT;
 }
 
+static int get_matching_audio_format_nums(const char *re)
+{
+       int i, ret;
+       regex_t preg;
+
+       ret = para_regcomp(&preg, re, REG_EXTENDED | REG_NOSUB);
+       if (ret < 0)
+               return ret;
+       ret = 0;
+       FOR_EACH_AUDIO_FORMAT(i)
+               if (regexec(&preg, audio_formats[i], 0, NULL, 0) != REG_NOMATCH)
+                       ret |= (1 << i);
+       regfree(&preg);
+       return ret;
+}
+
 /**
  * Compute the play time based on information of the given slot.
  *
@@ -190,7 +206,7 @@ int get_audio_format_num(const char *name)
  * It has to to take into account that probably the stream was not started at
  * the beginning of the file, that the clock between the server and the client
  * host may differ and that playback of the stream was delayed, e.g. because
- * the prebuffer filter is used in the filter chain of the given slot.
+ * the prebuffer filter is used in the filter configuration of the given slot.
  *
  * If no writer is active in the given slot, or \a slot_num is negative
  * (indicating that para_audiod runs in standby mode), an approximation based
@@ -357,6 +373,8 @@ static void close_receiver(int slot_num)
        btr_free_node(s->receiver_node->btrn);
        free(s->receiver_node);
        s->receiver_node = NULL;
+       tv_add(now, &(struct timeval)EMBRACE(0, 200 * 1000),
+               &a->restart_barrier);
 }
 
 static void writer_cleanup(struct writer_node *wn)
@@ -427,22 +445,15 @@ static void kill_btrn(struct btr_node *btrn, struct task *t, int error)
 
 static void kill_all_decoders(int error)
 {
-       int i, j;
+       int i;
 
        FOR_EACH_SLOT(i) {
-               struct slot_info *s = &slot[i];
-               struct audio_format_info *a;
+               struct slot_info *s = slot + i;
                if (s->format < 0)
                        continue;
-               a = afi + s->format;
-               if (s->wns)
-                       for (j = 0; j < a->num_writers; j++)
-                               kill_btrn(s->wns[j].btrn, &s->wns[j].task, error);
-               if (s->fns)
-                       for (j = 0; j < a->num_writers; j++)
-                               kill_btrn(s->fns[j].btrn, &s->wns[j].task, error);
-               if (s->receiver_node)
-                       kill_btrn(s->receiver_node->btrn, &s->receiver_node->task,
+               if (!s->receiver_node)
+                       continue;
+               kill_btrn(s->receiver_node->btrn, &s->receiver_node->task,
                                error);
        }
 }
@@ -466,20 +477,6 @@ static int get_empty_slot(void)
        return -E_NO_MORE_SLOTS;
 }
 
-/**
- * get the number of filters
- *
- * \param audio_format_num the number identifying the audio format
- *
- * \return the number of filters for the given audio format
- *
- * \sa struct filter;
- */
-int num_filters(int audio_format_num)
-{
-       return afi[audio_format_num].num_filters;
-}
-
 static void open_filters(struct slot_info *s)
 {
        struct audio_format_info *a = afi + s->format;
@@ -632,6 +629,8 @@ static bool must_start_decoder(void)
        int cafn = stat_task->current_audio_format_num;
        unsigned vs = stat_task->vss_status;
 
+       if (audiod_status != AUDIOD_ON)
+               return false;
        if (cafn < 0)
                return false;
        if (!stat_task->ct)
@@ -810,24 +809,39 @@ static int parse_receiver_args(void)
        for (i = conf.receiver_given - 1; i >= 0; i--) {
                char *arg = conf.receiver_arg[i];
                char *recv_arg = strchr(arg, ':');
+               int af_mask, j;
+
                ret = -E_MISSING_COLON;
                if (!recv_arg)
                        goto out;
                *recv_arg = '\0';
                recv_arg++;
-               ret = get_audio_format_num(arg);
+               ret = get_matching_audio_format_nums(arg);
                if (ret < 0)
                        goto out;
-               afi[ret].receiver_conf = check_receiver_arg(recv_arg, &receiver_num);
-               if (!afi[ret].receiver_conf) {
+               af_mask = ret;
+               FOR_EACH_AUDIO_FORMAT(j) {
+                       a = afi + j;
+                       if ((af_mask & (1 << j)) == 0) /* no match */
+                               continue;
+                       /*
+                        * If multiple receivers are given for this audio format, the
+                        * last one wins and we have to free the previous receiver
+                        * config here. Since we are iterating backwards, the winning
+                        * receiver arg is in fact the first one given.
+                        */
+                       if (a->receiver_conf)
+                               a->receiver->free_config(a->receiver_conf);
+                       a->receiver_conf = check_receiver_arg(recv_arg, &receiver_num);
                        ret = -E_RECV_SYNTAX;
-                       goto out;
+                       if (!a->receiver_conf)
+                               goto out;
+                       a->receiver = receivers + receiver_num;
                }
-               afi[ret].receiver = &receivers[receiver_num];
        }
-       /* use the first available receiver with no arguments
-        * for those audio formats for which no receiver
-        * was specified
+       /*
+        * Use the first available receiver with no arguments for those audio
+        * formats for which no receiver was specified.
         */
        cmd = para_strdup(receivers[0].name);
        FOR_EACH_AUDIO_FORMAT(i) {
@@ -839,6 +853,11 @@ static int parse_receiver_args(void)
                        return -E_RECV_SYNTAX;
                a->receiver = &receivers[receiver_num];
        }
+       FOR_EACH_AUDIO_FORMAT(i) {
+               a = afi + i;
+               PARA_INFO_LOG("receiving %s streams via %s receiver\n",
+                       audio_formats[i], a->receiver->name);
+       }
        ret = 1;
 out:
        free(cmd);
@@ -860,7 +879,8 @@ static int init_default_filters(void)
                 * If udp is used to receive this audiod format, add fecdec as
                 * the first filter.
                 */
-               if (strcmp(afi[i].receiver->name, "udp") == 0) {
+               if (strcmp(afi[i].receiver->name, "udp") == 0 ||
+                               strcmp(afi[i].receiver->name, "dccp") == 0) {
                        tmp = para_strdup("fecdec");
                        add_filter(i, tmp);
                        free(tmp);
@@ -977,19 +997,16 @@ static void signal_pre_select(struct sched *s, struct task *t)
        para_fd_set(st->fd, &s->rfds, &s->max_fileno);
 }
 
-static void signal_post_select(struct sched *s, struct task *t)
+static void signal_post_select(struct sched *s, __a_unused struct task *t)
 {
-       struct signal_task *st = container_of(t, struct signal_task, task);
+       int signum;
 
-       if (!FD_ISSET(st->fd, &s->rfds))
-               return;
-
-       st->signum = para_next_signal();
-       switch (st->signum) {
+       signum = para_next_signal(&s->rfds);
+       switch (signum) {
        case SIGINT:
        case SIGTERM:
        case SIGHUP:
-               PARA_EMERG_LOG("terminating on signal %d\n", st->signum);
+               PARA_EMERG_LOG("terminating on signal %d\n", signum);
                clean_exit(EXIT_FAILURE, "caught deadly signal");
        }
 }
@@ -1020,11 +1037,10 @@ static void command_post_select(struct sched *s, struct task *t)
                last_status_dump = *now;
        }
 
-       if (!FD_ISSET(ct->fd, &s->rfds))
-               return;
-       ret = handle_connect(ct->fd);
+       ret = handle_connect(ct->fd, &s->rfds);
        if (ret < 0)
                PARA_ERROR_LOG("%s\n", para_strerror(-ret));
+       audiod_status_dump();
 }
 
 static void init_command_task(struct command_task *ct)
@@ -1087,17 +1103,17 @@ static void try_to_close_slot(int slot_num)
 
        if (s->format < 0)
                return;
-       if (s->receiver_node && s->receiver_node->task.error != -E_TASK_UNREGISTERED)
+       if (s->receiver_node && s->receiver_node->task.error >= 0)
                return;
        for (i = 0; i < a->num_filters; i++)
-               if (s->fns && s->fns[i].task.error != -E_TASK_UNREGISTERED)
+               if (s->fns && s->fns[i].task.error >= 0)
                        return;
        if (a->num_writers > 0) {
                for (i = 0; i < a->num_writers; i++)
-                       if (s->wns && s->wns[i].task.error != -E_TASK_UNREGISTERED)
+                       if (s->wns && s->wns[i].task.error >= 0)
                                return;
        } else {
-               if (s->wns && s->wns[0].task.error != -E_TASK_UNREGISTERED)
+               if (s->wns && s->wns[0].task.error >= 0)
                        return;
        }
        PARA_INFO_LOG("closing slot %d\n", slot_num);
@@ -1148,10 +1164,19 @@ static void status_pre_select(struct sched *s, struct task *t)
        ret = btr_node_status(st->btrn, 0, BTR_NT_LEAF);
        if (ret > 0)
                goto min_delay;
-       if (!st->ct)
+       if (st->ct && audiod_status == AUDIOD_OFF)
+               goto min_delay;
+       if (!st->ct && audiod_status != AUDIOD_OFF)
                sched_request_barrier_or_min_delay(&st->restart_barrier, s);
        if (cafn >= 0)
                sched_request_barrier(&afi[cafn].restart_barrier, s);
+       /*
+        * If para_server is playing we'd like to have a smooth time display
+        * even if we are running in standby mode. So we request a timeout that
+        * expires at the next full second.
+        */
+       if (stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)
+               sched_request_timeout_ms(1000 - now->tv_usec / 1000, s);
        return;
 min_delay:
        sched_min_delay(s);
@@ -1169,7 +1194,7 @@ static void status_post_select(__a_unused struct sched *s, struct task *t)
                        kill_btrn(st->ct->btrn, &st->ct->task, -E_AUDIOD_OFF);
                        goto out;
                }
-               if (st->ct->task.error != -E_TASK_UNREGISTERED)
+               if (st->ct->task.error >= 0)
                        goto out;
                close_stat_pipe();
                st->clock_diff_count = conf.clock_diff_count_arg;
@@ -1180,34 +1205,39 @@ static void status_post_select(__a_unused struct sched *s, struct task *t)
                size_t sz;
                int ret;
                if (st->ct->task.error < 0) {
-                       if (st->ct->task.error != -E_TASK_UNREGISTERED)
+                       if (st->ct->task.error >= 0)
                                goto out;
                        close_stat_pipe();
                        goto out;
                }
                if (st->ct->status != CL_RECEIVING)
                        goto out;
-               ret = btr_node_status(st->btrn, 0, BTR_NT_LEAF);
-               if (ret <= 0)
+               ret = btr_node_status(st->btrn, st->min_iqs, BTR_NT_LEAF);
+               if (ret <= 0) {
+                       struct timeval diff;
+                       tv_diff(now, &st->last_status_read, &diff);
+                       if (diff.tv_sec > 61)
+                               kill_btrn(st->ct->btrn, &st->ct->task,
+                                       -E_STATUS_TIMEOUT);
                        goto out;
+               }
+               btr_merge(st->btrn, st->min_iqs);
                sz = btr_next_buffer(st->btrn, &buf);
                ret = for_each_stat_item(buf, sz, update_item);
                if (ret < 0) {
                        kill_btrn(st->ct->btrn, &st->ct->task, ret);
                        goto out;
                }
-               if (sz != ret)
+               if (sz != ret) {
+                       btr_consume(st->btrn, sz - ret);
                        st->last_status_read = *now;
-               else {
-                       struct timeval diff;
-                       tv_diff(now, &st->last_status_read, &diff);
-                       if (diff.tv_sec > 61)
-                               kill_btrn(st->ct->btrn, &st->ct->task,
-                                       -E_STATUS_TIMEOUT);
-               }
-               btr_consume(st->btrn, sz - ret);
+                       st->min_iqs = 0;
+               } else /* current status item crosses buffers */
+                       st->min_iqs = sz + 1;
                goto out;
        }
+       btr_drain(st->btrn);
+       st->current_audio_format_num = -1;
        if (tv_diff(now, &st->restart_barrier, NULL) < 0)
                goto out;
        if (st->clock_diff_count) { /* get status only one time */
@@ -1282,17 +1312,14 @@ __noreturn static void print_help_and_die(void)
 
 static void init_colors_or_die(void)
 {
-       int ret, i;
+       int i;
 
        if (!want_colors())
                return;
        daemon_set_default_log_colors();
        daemon_set_flag(DF_COLOR_LOG);
-       for (i = 0; i < conf.log_color_given; i++) {
-               ret = daemon_set_log_color(conf.log_color_arg[i]);
-               if (ret < 0)
-                       exit(EXIT_FAILURE);
-       }
+       for (i = 0; i < conf.log_color_given; i++)
+               daemon_set_log_color_or_die(conf.log_color_arg[i]);
 }
 
 /**