Fix osl() wrapper.
[paraslash.git] / audiod.c
index c17a4ae..eb3b200 100644 (file)
--- a/audiod.c
+++ b/audiod.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2005-2008 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
@@ -14,6 +14,7 @@
 #include "audiod.cmdline.h"
 #include "list.h"
 #include "sched.h"
+#include "ggo.h"
 #include "recv.h"
 #include "filter.h"
 #include "grab_client.cmdline.h"
@@ -48,8 +49,8 @@ struct audio_format_info {
        void **filter_conf;
        /** the number of filters that should be activated for this audio format */
        unsigned int num_writers;
-       /** pointer to the array of writers to be activated */
-       struct writer **writers;
+       /** Array of writer numbers to be activated. */
+       int *writer_nums;
        /** pointer to the array of writer configurations */
        void **writer_conf;
        /** do not start receiver/filters/writer before this time */
@@ -65,6 +66,50 @@ struct audio_format_info {
  * */
 struct slot_info slot[MAX_STREAM_SLOTS];
 
+/** The vss status flags audiod is interested in. */
+enum vss_status_flags {
+       /** Whether the 'N' flag is set. */
+       VSS_STATUS_FLAG_NEXT = 1,
+       /** The 'P' flag is set. */
+       VSS_STATUS_FLAG_PLAYING = 2,
+};
+
+/**
+ * The task for obtaining para_server's status (para_client stat).
+ *
+ * \sa struct task, struct sched.
+ */
+struct status_task {
+       /** The associated task structure of audiod. */
+       struct task task;
+       /** Client data associated with the stat task. */
+       struct client_task *ct;
+       /** Do not restart client command until this time. */
+       struct timeval restart_barrier;
+       /** Last time we received status data from para_server. */
+       struct timeval last_status_read;
+       /** The offset value announced by para_server. */
+       int offset_seconds;
+       /** The length of the current audio file as announced by para_server. */
+       int length_seconds;
+       /** The start of the current stream from the view of para_server. */
+       struct timeval server_stream_start;
+       /** The average time deviation between para_server and para_audiod. */
+       struct timeval sa_time_diff;
+       /** Whether client time is ahead of server time. */
+       int sa_time_diff_sign;
+       /** The 'P' and the 'N' flags as announced by para_server. */
+       enum vss_status_flags vss_status;
+       /** Number of times the clock difference is to be checked. */
+       unsigned clock_diff_count;
+       /** When to start the next check for clock difference. */
+       struct timeval clock_diff_barrier;
+       /** Number of the audio format as announced by para_server. */
+       int current_audio_format_num;
+};
+
+/** The array of status items sent by para_server. */
+char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
 
 /**
  * the current mode of operation of which can be changed by the on/off/cycle
@@ -79,7 +124,6 @@ int audiod_status = AUDIOD_ON;
 struct audiod_args_info conf;
 
 static char *socket_name;
-static FILE *logfile;
 static struct audio_format_info afi[NUM_AUDIO_FORMATS];
 
 static struct signal_task signal_task_struct, *sig_task = &signal_task_struct;
@@ -91,7 +135,7 @@ static struct status_task status_task_struct;
  *
  * \sa struct status_task
  */
-struct status_task *stat_task = &status_task_struct;
+static struct status_task *stat_task = &status_task_struct;
 static struct timeval initial_delay_barrier;
 
 /**
@@ -128,49 +172,111 @@ int get_audio_format_num(char *name)
        return -E_UNSUPPORTED_AUDIO_FORMAT;
 }
 
-/**
- * the log function of para_audiod
- *
- * \param ll loglevel
- * \param fmt the format string
- */
-void para_log(int ll, const char* fmt,...)
+char *get_time_string(int slot_num)
 {
-       va_list argp;
-       FILE *outfd;
-       struct tm *tm;
-       time_t t1;
-       char str[MAXLINE] = "";
-       static char *hostname;
-
-       if (ll < conf.loglevel_arg)
-               return;
-       if (!logfile && conf.daemon_given)
-               return;
-       if (!hostname)
-               hostname = para_hostname();
-       outfd = logfile? logfile : stderr;
-       time(&t1);
-       tm = localtime(&t1);
-       strftime(str, MAXLINE, "%b %d %H:%M:%S", tm);
-       fprintf(outfd, "%s %s ", str, hostname);
-       if (conf.loglevel_arg <= INFO)
-               fprintf(outfd, "%i ", ll);
-       va_start(argp, fmt);
-       vfprintf(outfd, fmt, argp);
-       va_end(argp);
+       int ret, seconds = 0, length;
+       struct timeval *tmp, sum, sss, /* server stream start */
+               wtime, /* now - writer start */
+               rskip; /* receiver start - sss */
+       struct slot_info *s = slot_num < 0? NULL : &slot[slot_num];
+
+       if (audiod_status == AUDIOD_OFF)
+               goto empty;
+       if (!(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING)) {
+               if (stat_task->length_seconds) /* paused */
+                       return NULL;
+               goto empty; /* stopped */
+       }
+       if (audiod_status == AUDIOD_ON && !s)
+               goto empty;
+       /* valid status items and playing */
+       if (s) { /* writer active in this slot */
+               length = s->seconds_total;
+               tmp = &s->server_stream_start;
+       } else { /* standby mode, rely on status items */
+               length = stat_task->length_seconds;
+               tmp = &stat_task->server_stream_start;
+       }
+       if (stat_task->sa_time_diff_sign > 0)
+               tv_diff(tmp, &stat_task->sa_time_diff, &sss);
+       else
+               tv_add(tmp, &stat_task->sa_time_diff, &sss);
+       if (!s) {
+               struct timeval diff;
+               tv_diff(now, &sss, &diff);
+               seconds = diff.tv_sec + stat_task->offset_seconds;
+               goto out;
+       }
+       tv_diff(now, &s->wstime, &wtime);
+       seconds = s->offset_seconds;
+       ret = tv_diff(&s->rstime, &sss, &rskip);
+       if (ret > 0) { /* audiod was started in the middle of the stream */
+               tv_add(&wtime, &rskip, &sum);
+               seconds += sum.tv_sec;
+       } else
+               seconds += wtime.tv_sec;
+out:
+       seconds = PARA_MIN(seconds, length);
+       seconds = PARA_MAX(seconds, 0);
+       return make_message(
+               "%s: %s%d:%02d [%d:%02d] (%d%%/%d:%02d)\n",
+               status_item_list[SI_PLAY_TIME],
+               s? "" : "~",
+               seconds / 60,
+               seconds % 60,
+               (length - seconds) / 60,
+               (length - seconds) % 60,
+               length? (seconds * 100 + length / 2) / length : 0,
+               length / 60,
+               length % 60
+       );
+empty:
+       return make_message("%s:\n", status_item_list[SI_PLAY_TIME]);
 }
 
-static char *configfile_exists(void)
+static int want_colors(void)
 {
-       char *home = para_homedir();
-       char *config_file = make_message("%s/.paraslash/audiod.conf",
-               home);
-       free(home);
-       if (file_exists(config_file))
-               return config_file;
+       if (conf.color_arg == color_arg_no)
+               return 0;
+       if (conf.color_arg == color_arg_yes)
+               return 1;
+       if (conf.logfile_given)
+               return 0;
+       return isatty(STDERR_FILENO);
+}
+
+static void parse_config_or_die(void)
+{
+       int ret;
+       char *config_file;
+       struct audiod_cmdline_parser_params params = {
+               .override = 0,
+               .initialize = 0,
+               .check_required = 1,
+               .check_ambiguity = 0,
+               .print_errors = 1
+       };
+
+       if (conf.config_file_given)
+               config_file = para_strdup(conf.config_file_arg);
+       else {
+               char *home = para_homedir();
+               config_file = make_message("%s/.paraslash/audiod.conf", home);
+               free(home);
+       }
+       ret = file_exists(config_file);
+       if (conf.config_file_given && !ret) {
+               PARA_EMERG_LOG("can not read config file %s\n", config_file);
+               goto err;
+       }
+       if (ret)
+               audiod_cmdline_parser_config_file(config_file, &conf, &params);
+       free(config_file);
+       daemon_set_loglevel(conf.loglevel_arg);
+       return;
+err:
        free(config_file);
-       return NULL;
+       exit(EXIT_FAILURE);
 }
 
 static void setup_signal_handling(void)
@@ -180,7 +286,7 @@ static void setup_signal_handling(void)
        para_install_sighandler(SIGINT);
        para_install_sighandler(SIGTERM);
        para_install_sighandler(SIGHUP);
-       signal(SIGPIPE, SIG_IGN);
+       para_sigaction(SIGPIPE, SIG_IGN);
 }
 
 static void clear_slot(int slot_num)
@@ -275,8 +381,8 @@ static void open_filters(int slot_num)
                return;
        PARA_INFO_LOG("opening %s filters\n", audio_formats[s->format]);
        s->fc = para_calloc(sizeof(struct filter_chain));
-       s->fc->filter_nodes = para_malloc(nf * sizeof(struct filter_chain));
-       s->fc->inbuf = s->receiver_node->buf;
+       s->fc->filter_nodes = para_malloc(nf * sizeof(struct filter_node));
+       s->fc->inbufp = &s->receiver_node->buf;
        s->fc->in_loaded = &s->receiver_node->loaded;
        s->fc->input_error = &s->receiver_node->task.error;
        s->fc->task.pre_select = filter_pre_select;
@@ -296,7 +402,7 @@ static void open_filters(int slot_num)
                f->open(fn);
                PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
                        audio_formats[s->format], i,  nf, f->name, slot_num);
-               s->fc->outbuf = fn->buf;
+               s->fc->outbufp = &fn->buf;
                s->fc->out_loaded = &fn->loaded;
        }
        register_task(&s->fc->task);
@@ -314,7 +420,7 @@ static void open_writers(int slot_num)
        else
                s->wng = wng_new(a->num_writers);
        if (s->fc) {
-               s->wng->buf = s->fc->outbuf;
+               s->wng->bufp = s->fc->outbufp;
                s->wng->loaded = s->fc->out_loaded;
                s->wng->input_error = &s->fc->task.error;
                s->wng->channels = &s->fc->channels;
@@ -322,20 +428,22 @@ static void open_writers(int slot_num)
                s->fc->output_error = &s->wng->task.error;
                PARA_INFO_LOG("samplerate: %d\n", *s->wng->samplerate);
        } else {
-               s->wng->buf = s->receiver_node->buf;
+               s->wng->bufp = &s->receiver_node->buf;
                s->wng->loaded = &s->receiver_node->loaded;
                s->wng->input_error = &s->receiver_node->task.error;
        }
        for (i = 0; i < a->num_writers; i++) {
                s->wng->writer_nodes[i].conf = a->writer_conf[i];
-               s->wng->writer_nodes[i].writer = a->writers[i];
+               s->wng->writer_nodes[i].writer_num = a->writer_nums[i];
        }
        ret = wng_open(s->wng);
-       if (ret < 0) {
-               PARA_ERROR_LOG("%s\n", para_strerror(-ret));
+       if (ret < 0)
                return;
-       }
        s->wstime = *now;
+       s->server_stream_start = stat_task->server_stream_start.tv_sec?
+               stat_task->server_stream_start : *now;
+       s->offset_seconds = stat_task->offset_seconds;
+       s->seconds_total = stat_task->length_seconds;
        activate_inactive_grab_clients(slot_num, s->format, s->fc);
 }
 
@@ -367,6 +475,7 @@ static int open_receiver(int format)
                audio_formats[s->format], a->receiver->name, slot_num);
        rn->task.pre_select = a->receiver->pre_select;
        rn->task.post_select = a->receiver->post_select;
+       s->rstime = *now;
        sprintf(rn->task.status, "%s receiver node", rn->receiver->name);
        register_task(&rn->task);
        ret = 1;
@@ -377,33 +486,54 @@ err:
        return ret;
 }
 
+/* return: 0: Not running, 1: Running, -1: Running but eof (or error) */
 static int receiver_running(int format)
 {
-       int i;
+       int i, ret = 0;
 
        FOR_EACH_SLOT(i) {
                struct slot_info *s = &slot[i];
-               if (s->format == format && s->receiver_node
-                               && s->receiver_node->task.error >= 0)
+               if (s->format != format)
+                       continue;
+               if (!s->receiver_node)
+                       continue;
+               if (s->receiver_node->task.error >= 0)
                        return 1;
+               ret = -1;
        }
-       return 0;
+       return ret;
 }
 
-static int open_current_receiver(struct sched *s)
+static void open_current_receiver(struct sched *s)
 {
        struct timeval diff;
-       int cafn = stat_task->current_audio_format_num;
+       int ret, cafn = stat_task->current_audio_format_num;
 
        if (cafn < 0 || !stat_task->ct)
-               return 0;
-       if (receiver_running(cafn))
-               return 0;
+               return;
+       /* Do nothing if the 'N' flag is set or the 'P' flag is unset */
+       if (stat_task->vss_status != VSS_STATUS_FLAG_PLAYING)
+               return;
+       ret = receiver_running(cafn);
+       if (ret > 0) /* already running and not eof */
+               return;
+       if (ret < 0) { /* eof */
+               /*
+                * para_server uses a zero start time during the announcement
+                * period, i.e. before it sends the first chunk. Wait until
+                * this period begins to avoid restarting the receiver that
+                * belongs to the file just completed.
+                */
+               if (stat_task->server_stream_start.tv_sec)
+                       return;
+       }
        if (tv_diff(now, &afi[cafn].restart_barrier, &diff) < 0) {
+               /* avoid busy loop */
                s->timeout = diff;
-               return 0;
+               return;
        }
-       return open_receiver(cafn) < 0? 0 : 1;
+       /* start a new receiver */
+       open_receiver(cafn);
 }
 
 static unsigned compute_time_diff(const struct timeval *status_time)
@@ -468,13 +598,16 @@ static int check_stat_line(char *line, __a_unused void *data)
        tmp = make_message("%s\n", line);
        stat_client_write(tmp, itemnum);
        free(tmp);
-       free(stat_task->stat_item_values[itemnum]);
-       stat_task->stat_item_values[itemnum] = para_strdup(line);
+       free(stat_item_values[itemnum]);
+       stat_item_values[itemnum] = para_strdup(line);
        ilen = strlen(status_item_list[itemnum]);
        switch (itemnum) {
-       case SI_STATUS:
-               stat_task->playing = strstr(line, "playing")? 1 : 0;
-               PARA_INFO_LOG("stat task playing: %d\n", stat_task->playing);
+       case SI_STATUS_FLAGS:
+               stat_task->vss_status = 0;
+               if (strchr(line, 'N'))
+                       stat_task->vss_status |= VSS_STATUS_FLAG_NEXT;
+               if (strchr(line, 'P'))
+                       stat_task->vss_status |= VSS_STATUS_FLAG_PLAYING;
                break;
        case SI_OFFSET:
                stat_task->offset_seconds = atoi(line + ilen + 1);
@@ -545,19 +678,18 @@ static int add_filter(int format, char *cmdline)
        return filter_num;
 }
 
-static int init_writers(void)
+static int parse_writer_args(void)
 {
        int i, ret, nw;
        char *cmd;
        struct audio_format_info *a;
 
-       init_supported_writers();
-       nw = PARA_MAX(1, conf.writer_given);
+       nw = PARA_MAX(1U, conf.writer_given);
        PARA_INFO_LOG("maximal number of writers: %d\n", nw);
        FOR_EACH_AUDIO_FORMAT(i) {
                a = &afi[i];
                a->writer_conf = para_malloc(nw * sizeof(void *));
-               a->writers = para_malloc(nw * sizeof(struct writer *));
+               a->writer_nums = para_malloc(nw * sizeof(int));
                a->num_writers = 0;
        }
        for (i = 0; i < conf.writer_given; i++) {
@@ -573,7 +705,7 @@ static int init_writers(void)
                        ret = writer_num;
                        goto out;
                }
-               a->writers[nw] = &writers[writer_num];
+               a->writer_nums[nw] = writer_num;
                a->writer_conf[nw] = wconf;
                PARA_INFO_LOG("%s writer #%d: %s\n", audio_formats[ret],
                        nw, writer_names[writer_num]);
@@ -584,16 +716,12 @@ out:
        return ret;
 }
 
-static int init_receivers(void)
+static int parse_receiver_args(void)
 {
        int i, ret, receiver_num;
        char *cmd = NULL;
        struct audio_format_info *a;
 
-       for (i = 0; receivers[i].name; i++) {
-               PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
-               receivers[i].init(&receivers[i]);
-       }
        for (i = conf.receiver_given - 1; i >= 0; i--) {
                char *arg = conf.receiver_arg[i];
                char *recv_arg = strchr(arg, ':');
@@ -664,12 +792,11 @@ out:
        return ret;
 }
 
-static int init_filters(void)
+static int parse_filter_args(void)
 {
        int i, ret, nf;
 
-       filter_init(filters);
-       nf = PARA_MAX(1,  conf.filter_given);
+       nf = PARA_MAX(1U, conf.filter_given);
        PARA_INFO_LOG("maximal number of filters: %d\n", nf);
        FOR_EACH_AUDIO_FORMAT(i) {
                afi[i].filter_conf = para_malloc(nf * sizeof(void *));
@@ -697,17 +824,17 @@ out:
        return ret;
 }
 
-static int init_stream_io(void)
+static int parse_stream_args(void)
 {
        int ret;
 
-       ret = init_writers();
+       ret = parse_receiver_args();
        if (ret < 0)
                return ret;
-       ret = init_receivers();
+       ret = parse_filter_args();
        if (ret < 0)
                return ret;
-       ret = init_filters();
+       ret = parse_writer_args();
        if (ret < 0)
                return ret;
        return 1;
@@ -815,19 +942,14 @@ static void close_stat_pipe(void)
        client_close(stat_task->ct);
        stat_task->ct = NULL;
        FOR_EACH_STATUS_ITEM(i) {
-               free(stat_task->stat_item_values[i]);
-               stat_task->stat_item_values[i] = NULL;
+               free(stat_item_values[i]);
+               stat_item_values[i] = NULL;
        }
        dump_empty_status();
        stat_task->length_seconds = 0;
        stat_task->offset_seconds = 0;
+       stat_task->vss_status = 0;
        audiod_status_dump();
-       stat_task->playing = 0;
-       stat_task->stat_item_values[SI_BASENAME] = make_message(
-               "%s: no connection to para_server\n",
-               status_item_list[SI_BASENAME]);
-       stat_client_write(stat_task->stat_item_values[SI_BASENAME],
-               SI_BASENAME);
 }
 
 /**
@@ -888,7 +1010,8 @@ static void start_stop_decoders(struct sched *s)
 
        FOR_EACH_SLOT(i)
                try_to_close_slot(i);
-       if (audiod_status != AUDIOD_ON || !stat_task->playing)
+       if (audiod_status != AUDIOD_ON ||
+                       !(stat_task->vss_status & VSS_STATUS_FLAG_PLAYING))
                return kill_all_decoders(-E_NOT_PLAYING);
        open_current_receiver(s);
        FOR_EACH_SLOT(i) {
@@ -975,15 +1098,21 @@ static void status_pre_select(struct sched *s, struct task *t)
                int argc = 3;
                PARA_INFO_LOG("clock diff count: %d\n", st->clock_diff_count);
                st->clock_diff_count--;
-               client_open(argc, argv, &st->ct);
+               client_open(argc, argv, &st->ct, NULL);
                set_stat_task_restart_barrier(2);
 
        } else {
                char *argv[] = {"audiod", "stat", NULL};
                int argc = 2;
-               client_open(argc, argv, &st->ct);
+               client_open(argc, argv, &st->ct, NULL);
                set_stat_task_restart_barrier(5);
        }
+       free(stat_item_values[SI_BASENAME]);
+       stat_item_values[SI_BASENAME] = make_message(
+               "%s: no connection to para_server\n",
+               status_item_list[SI_BASENAME]);
+       stat_client_write(stat_item_values[SI_BASENAME],
+               SI_BASENAME);
        st->last_status_read = *now;
 out:
        start_stop_decoders(s);
@@ -1016,6 +1145,38 @@ static void set_initial_status(void)
                PARA_WARNING_LOG("invalid mode\n");
 }
 
+__noreturn static void print_help_and_die(void)
+{
+       int d = conf.detailed_help_given;
+       const char **p = d? audiod_args_info_detailed_help
+               : audiod_args_info_help;
+
+       printf_or_die("%s\n\n", AUDIOD_CMDLINE_PARSER_PACKAGE "-"
+               AUDIOD_CMDLINE_PARSER_VERSION);
+       printf_or_die("%s\n\n", audiod_args_info_usage);
+       for (; *p; p++)
+               printf_or_die("%s\n", *p);
+       print_receiver_helps(d);
+       print_filter_helps(d);
+       print_writer_helps(d);
+       exit(0);
+}
+
+static void init_colors_or_die(void)
+{
+       int ret, 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);
+       }
+}
+
 /**
  * the main function of para_audiod
  *
@@ -1028,7 +1189,6 @@ static void set_initial_status(void)
  * */
 int main(int argc, char *argv[])
 {
-       char *config_file;
        int ret, i;
        static struct sched s;
        struct command_task command_task_struct, *cmd_task = &command_task_struct;
@@ -1041,30 +1201,31 @@ int main(int argc, char *argv[])
        };
 
        valid_fd_012();
-       audiod_cmdline_parser_ext(argc, argv, &conf, &params);
+       if (audiod_cmdline_parser_ext(argc, argv, &conf, &params))
+               exit(EXIT_FAILURE);
        HANDLE_VERSION_FLAG("audiod", conf);
-       para_drop_privileges(conf.user_arg, conf.group_arg);
-       config_file = configfile_exists();
-       if (config_file) {
-               params.override = 0;
-               params.initialize = 0;
-               params.check_required = 1;
-               params.check_ambiguity = 0;
-               params.print_errors = 1;
-               if (audiod_cmdline_parser_config_file(config_file, &conf, &params)) {
-                       PARA_EMERG_LOG("parse error in config file\n");
-                       exit(EXIT_FAILURE);
-               }
-               free(config_file);
+       /* init receivers/filters/writers early to make help work */
+       recv_init();
+       filter_init();
+       writer_init();
+       if (conf.help_given || conf.detailed_help_given)
+               print_help_and_die();
+       drop_privileges_or_die(conf.user_arg, conf.group_arg);
+       parse_config_or_die();
+       init_colors_or_die();
+       daemon_set_flag(DF_LOG_TIME);
+       daemon_set_flag(DF_LOG_HOSTNAME);
+       daemon_set_flag(DF_LOG_LL);
+       if (conf.logfile_given) {
+               daemon_set_logfile(conf.logfile_arg);
+               daemon_open_log_or_die();
        }
-       if (conf.logfile_given)
-               logfile = open_log(conf.logfile_arg);
-       log_welcome("para_audiod", conf.loglevel_arg);
-       i = init_stream_io();
-       if (i < 0) {
-               PARA_EMERG_LOG("init stream io error: %s\n", para_strerror(-i));
+       ret = parse_stream_args();
+       if (ret < 0) {
+               PARA_EMERG_LOG("%s\n", para_strerror(-ret));
                exit(EXIT_FAILURE);
        }
+       log_welcome("para_audiod");
        server_uptime(UPTIME_SET);
        set_initial_status();
        FOR_EACH_SLOT(i)
@@ -1077,7 +1238,7 @@ int main(int argc, char *argv[])
        init_command_task(cmd_task);
 
        if (conf.daemon_given)
-               daemon_init();
+               daemonize();
 
        register_task(&sig_task->task);
        register_task(&cmd_task->task);