fix gcc warnings on shadowed declarations
authorAndre <maan@p133.(none)>
Fri, 23 Jun 2006 13:04:37 +0000 (15:04 +0200)
committerAndre <maan@p133.(none)>
Fri, 23 Jun 2006 13:04:37 +0000 (15:04 +0200)
19 files changed:
aac_afh.c
audiod.c
audiod_command.c
dbadm.c
dccp_send.c
fd.c
fd.h
grab_client.c
gui.c
http_send.c
mp3_afh.c
net.c
net.h
ogg_afh.c
ortp_recv.c
para.h
sdl_gui.c
time.c
write.c

index e6f99b4..d60588b 100644 (file)
--- a/aac_afh.c
+++ b/aac_afh.c
@@ -114,7 +114,6 @@ static int read_chunk_table(size_t skip)
                        PARA_DEBUG_LOG("offset #%d: %zu\n", i, chunk_table[i]);
        }
        return 1;
-
 }
 
 long unsigned aac_set_chunk_tv(mp4AudioSpecificConfig *mp4ASC)
index b1313d1..3b61119 100644 (file)
--- a/audiod.c
+++ b/audiod.c
@@ -541,18 +541,18 @@ static void check_stat_line(char *line)
                break;
        case SI_STREAM_START:
                if (sscanf(line + ilen + 1, "%lu.%lu", &sec, &usec) == 2) {
-                       struct timeval tmp, delay;
+                       struct timeval a_start, delay;
                        delay.tv_sec = conf.stream_delay_arg / 1000;
                        delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
                        stat_task->server_stream_start.tv_sec = sec;
                        stat_task->server_stream_start.tv_usec = usec;
                        if (stat_task->sa_time_diff_sign < 0)
                                tv_add(&stat_task->server_stream_start,
-                                       &stat_task->sa_time_diff, &tmp);
+                                       &stat_task->sa_time_diff, &a_start);
                        else
                                tv_diff(&stat_task->server_stream_start,
-                                       &stat_task->sa_time_diff, &tmp);
-                       tv_add(&tmp, &delay, &initial_delay_barrier);
+                                       &stat_task->sa_time_diff, &a_start);
+                       tv_add(&a_start, &delay, &initial_delay_barrier);
                }
                break;
        case SI_CURRENT_TIME:
@@ -755,17 +755,17 @@ static int init_receivers(void)
        }
        for (i = conf.receiver_given - 1; i >= 0; i--) {
                char *arg = conf.receiver_arg[i];
-               char *recv = strchr(arg, ':');
+               char *recv_arg = strchr(arg, ':');
                PARA_INFO_LOG("arg: %s\n", arg);
                ret = -E_MISSING_COLON;
-               if (!recv)
+               if (!recv_arg)
                        goto out;
-               *recv = '\0';
-               recv++;
+               *recv_arg = '\0';
+               recv_arg++;
                ret = get_audio_format_num(arg);
                if (ret < 0)
                        goto out;
-               afi[ret].receiver_conf = check_receiver_arg(recv, &receiver_num);
+               afi[ret].receiver_conf = check_receiver_arg(recv_arg, &receiver_num);
                if (!afi[ret].receiver_conf) {
                        ret = -E_RECV_SYNTAX;
                        goto out;
index 4d7afd2..fe26b66 100644 (file)
@@ -261,7 +261,7 @@ static struct timeval *wstime(void)
 __malloc static char *decoder_flags(void)
 {
        int i;
-       char decoder_flags[MAX_STREAM_SLOTS + 1];
+       char flags[MAX_STREAM_SLOTS + 1];
 
        FOR_EACH_SLOT(i) {
                struct slot_info *s = &slot[i];
@@ -270,11 +270,11 @@ __malloc static char *decoder_flags(void)
                        flag += 1;
                if (s->wng)
                        flag += 2;
-               decoder_flags[i] = flag;
+               flags[i] = flag;
        }
-       decoder_flags[MAX_STREAM_SLOTS] = '\0';
+       flags[MAX_STREAM_SLOTS] = '\0';
        return make_message("%s:%s\n", status_item_list[SI_DECODER_FLAGS],
-               decoder_flags);
+               flags);
 }
 
 static int dump_commands(int fd)
diff --git a/dbadm.c b/dbadm.c
index 6b5a3e9..40ecf0b 100644 (file)
--- a/dbadm.c
+++ b/dbadm.c
@@ -56,19 +56,19 @@ static int client_cmd(const char *cmd)
 static char **get_all_atts(int *num_atts)
 {
        int fd = client_cmd("laa");
-       FILE *pipe;
+       FILE *f;
        char **ret = NULL, *buf;
 
        if (fd < 0)
                return NULL;
-       pipe = fdopen(fd, "r");
-       if (!pipe) {
+       f = fdopen(fd, "r");
+       if (!f) {
                close(fd);
                return NULL;
        }
        *num_atts = 0;
        buf = para_malloc(MAXLINE * sizeof(char));
-       while (fgets(buf, MAXLINE - 1, pipe) && *buf) {
+       while (fgets(buf, MAXLINE - 1, f) && *buf) {
                size_t n = strlen(buf);
                buf[n - 1] = '\0';
                if (choice_len < n - 1)
index 08930ad..aba21a6 100644 (file)
@@ -122,11 +122,11 @@ static void dccp_shutdown_client(struct dccp_client *dc)
 
 static int dccp_write(int fd, const char *buf, size_t len)
 {
-       size_t send, written = 0;
+       size_t size, written = 0;
        int ret;
 again:
-       send = PARA_MIN(1024, len - written);
-       ret = write(fd, buf + written, send);
+       size = PARA_MIN(1024, len - written);
+       ret = write(fd, buf + written, size);
        if (ret < 0)
                goto err_out;
        written += ret;
diff --git a/fd.c b/fd.c
index b913009..36b3769 100644 (file)
--- a/fd.c
+++ b/fd.c
@@ -56,11 +56,11 @@ int file_exists(const char *fn)
  * \sa select(2) select_tut(2)
  */
 int para_select(int n, fd_set *readfds, fd_set *writefds,
-               struct timeval *timeout)
+               struct timeval *timeout_tv)
 {
        int ret, err;
        do {
-               ret = select(n, readfds, writefds, NULL, timeout);
+               ret = select(n, readfds, writefds, NULL, timeout_tv);
                err = errno;
        } while (ret < 0 && err == EINTR);
        if (ret < 0)
diff --git a/fd.h b/fd.h
index e17f11f..46178bd 100644 (file)
--- a/fd.h
+++ b/fd.h
@@ -20,7 +20,7 @@
 
 int file_exists(const char *);
 int para_select(int n, fd_set *readfds, fd_set *writefds,
-               struct timeval *timeout);
+               struct timeval *timeout_tv);
 int mark_fd_nonblock(int fd);
 void para_fd_set(int fd, fd_set *fds, int *max_fileno);
 __must_check int para_fread(void *dest, size_t nbytes, size_t nmemb, FILE *stream);
index 735e5b4..efe9cf6 100644 (file)
@@ -89,31 +89,31 @@ rewrite:
 static int check_gc_args(struct grab_client *gc)
 {
        int i;
-       struct grab_client_args_info *conf = gc->conf;
+       struct grab_client_args_info *c = gc->conf;
        char **mv = grab_client_cmdline_parser_mode_values;
 
-       PARA_INFO_LOG("filter_num: %d\n", gc->conf->filter_num_arg);
+       PARA_INFO_LOG("filter_num: %d\n", c->filter_num_arg);
        for (i = 0; mv[i]; i++)
-               if (!strcmp(conf->mode_arg, mv[i]))
+               if (!strcmp(c->mode_arg, mv[i]))
                        break;
        if (!mv[i])
                return -E_GC_SYNTAX;
        gc->mode = i;
        gc->audio_format_num = -1;
-       if (conf->audio_format_given) {
-               gc->audio_format_num = get_audio_format_num(conf->audio_format_arg);
+       if (c->audio_format_given) {
+               gc->audio_format_num = get_audio_format_num(c->audio_format_arg);
                if (gc->audio_format_num < 0)
                        return gc->audio_format_num;
        }
-       if (conf->slot_arg > MAX_STREAM_SLOTS)
+       if (c->slot_arg > MAX_STREAM_SLOTS)
                return -E_BAD_GC_SLOT;
-       if (conf->filter_num_arg <= 0)
+       if (c->filter_num_arg <= 0)
                return -E_BAD_GC_FILTER_NUM;
-       if (conf->audio_format_given) {
-               if (num_filters(gc->audio_format_num) < conf->filter_num_arg)
+       if (c->audio_format_given) {
+               if (num_filters(gc->audio_format_num) < c->filter_num_arg)
                        return -E_BAD_GC_FILTER_NUM;
        } else
-               if (conf->filter_num_arg > max_num_filters())
+               if (c->filter_num_arg > max_num_filters())
                        return -E_BAD_GC_FILTER_NUM;
 
        return 1;
@@ -183,7 +183,7 @@ void activate_grab_client(struct grab_client *gc, struct filter_node *fn)
  * \sa filter_chain_info::filters, inactive_grab_client_list,
  * activate_grab_client
  */
-void activate_inactive_grab_clients(int slot, int audio_format_num,
+void activate_inactive_grab_clients(int slot_num, int audio_format_num,
                struct list_head *filter_list)
 {
        struct grab_client *gc, *tmp;
@@ -192,7 +192,7 @@ void activate_inactive_grab_clients(int slot, int audio_format_num,
 
        list_for_each_entry_safe(gc, tmp, &inactive_grab_client_list, node) {
 //             PARA_INFO_LOG("checking inactive grab client %p\n", gc);
-               if (gc->conf->slot_arg >= 0 && gc->conf->slot_arg != slot)
+               if (gc->conf->slot_arg >= 0 && gc->conf->slot_arg != slot_num)
                        continue;
                if (gc->audio_format_num >= 0 && gc->audio_format_num !=
                                audio_format_num)
diff --git a/gui.c b/gui.c
index cea54ab..ffd1ea8 100644 (file)
--- a/gui.c
+++ b/gui.c
@@ -1083,22 +1083,22 @@ static void com_scroll_up(void)
 {
        struct rb_entry *rbe = NULL;
        unsigned lines;
-       int i, first_rbe, scroll;
+       int i, first_rbe, num_scroll;
 
        /* the entry that is going to vanish */
        rbe = ringbuffer_get(bot_win_rb, scroll_position);
        if (!rbe)
                goto err_out;
-       scroll = NUM_LINES(rbe->len);
+       num_scroll = NUM_LINES(rbe->len);
        first_rbe = first_visible_rbe(&lines);
        if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
                goto err_out;
        scroll_position++;
-       wscrl(bot.win, -scroll);
+       wscrl(bot.win, -num_scroll);
        i = draw_top_rbe(&lines);
        if (i < 0)
                goto err_out;
-       while (i > 0 && lines < scroll) {
+       while (i > 0 && lines < num_scroll) {
                int rbe_lines;
                rbe = ringbuffer_get(bot_win_rb, --i);
                if (!rbe)
index f0c9851..111c49b 100644 (file)
@@ -208,11 +208,11 @@ static void http_send( long unsigned current_chunk,
                        continue;
                if (hc->status == HTTP_READY_TO_STREAM) {
                        int hlen;
-                       char *buf = afs_get_header(&hlen);
-                       if (buf && hlen > 0 && current_chunk) {
+                       char *hbuf = afs_get_header(&hlen);
+                       if (hbuf && hlen > 0 && current_chunk) {
                                /* need to send header */
                                PARA_INFO_LOG("queueing header: %d\n", hlen);
-                               if (queue_packet(hc, buf, hlen) < 0)
+                               if (queue_packet(hc, hbuf, hlen) < 0)
                                        continue;
                        } else
                                PARA_INFO_LOG("%s", "no need to queue header\n");
index cd08994..d38e435 100644 (file)
--- a/mp3_afh.c
+++ b/mp3_afh.c
@@ -403,7 +403,7 @@ static int mp3_read_info(void)
        tv_divide(fcount, &total_time, &af->chunk_tv);
        rewind(mp3.file);
        PARA_DEBUG_LOG("chunk_time: %lums\n", tv2ms(&af->chunk_tv));
-       tv_scale(30, &af->chunk_tv, &af->eof_tv);
+       tv_scale(3, &af->chunk_tv, &af->eof_tv);
        PARA_DEBUG_LOG("eof timeout: %lu\n", tv2ms(&af->eof_tv));
        return 1;
 }
diff --git a/net.c b/net.c
index c70c658..b05f74d 100644 (file)
--- a/net.c
+++ b/net.c
@@ -39,11 +39,11 @@ static struct crypt_data *crypt_data_array;
  * activate encryption for one file descriptor
  *
  * \param fd the file descriptor
- * \param recv the function used for decrypting received data
- * \param send the function used for encrypting before sending
+ * \param recv_f the function used for decrypting received data
+ * \param send_f the function used for encrypting before sending
  * \param private_data user data supplied by the caller
  */
-void enable_crypt(int fd, crypt_function *recv, crypt_function *send,
+void enable_crypt(int fd, crypt_function *recv_f, crypt_function *send_f,
        void *private_data)
 {
        if (fd + 1 > cda_size) {
@@ -53,8 +53,8 @@ void enable_crypt(int fd, crypt_function *recv, crypt_function *send,
                        (fd + 1 - cda_size) * sizeof(struct crypt_data));
                cda_size = fd + 1;
        }
-       crypt_data_array[fd].recv = recv;
-       crypt_data_array[fd].send = send;
+       crypt_data_array[fd].recv = recv_f;
+       crypt_data_array[fd].send = send_f;
        crypt_data_array[fd].private_data = private_data;
        PARA_INFO_LOG("rc4 encryption activated for fd %d\n", fd);
 }
@@ -578,8 +578,11 @@ int recv_pattern(int fd, const char *pattern, size_t bufsize)
                goto out;
        ret = 1;
 out:
-       if (ret < 0)
-               PARA_NOTICE_LOG("did not receive pattern '%s'\n", pattern);
+       if (ret < 0) {
+               PARA_NOTICE_LOG("n = %d, did not receive pattern '%s'\n", n, pattern);
+               if (n > 0)
+                       PARA_NOTICE_LOG("recvd: %s\n", buf);
+       }
        free(buf);
        return ret;
 }
diff --git a/net.h b/net.h
index 58732c0..4a89778 100644 (file)
--- a/net.h
+++ b/net.h
@@ -48,7 +48,7 @@ int recv_cred_buffer(int, char *, size_t);
 ssize_t send_cred_buffer(int, char*);
 int recv_pattern(int fd, const char *pattern, size_t bufsize);
 int init_tcp_socket(int port);
-void enable_crypt(int fd, crypt_function *recv, crypt_function *send,
+void enable_crypt(int fd, crypt_function *recv_f, crypt_function *send_f,
        void *private_data);
 void disable_crypt(int fd);
 
index 874947e..cce1eb5 100644 (file)
--- a/ogg_afh.c
+++ b/ogg_afh.c
@@ -37,7 +37,7 @@ static FILE *infile;
 static int header_len, oggbuf_len, vi_channels;
 static char *header, *oggbuf;
 static ssize_t *chunk_table, max_chunk_len;
-struct audio_format_handler *af;
+static struct audio_format_handler *af;
 static long vi_sampling_rate, vi_bitrate, vi_bitrate_nominal,
        num_chunks;
 
@@ -129,7 +129,7 @@ static void tunetable(void)
                        continue;
                }
                if (j < 0)
-                       tv_scale(i + 2, &af->chunk_tv, &af->eof_tv);
+                       tv_scale(i, &af->chunk_tv, &af->eof_tv);
                for (j = lp; j < i; j++)
                        chunk_table[j] = chunk_table[i];
                lp = i;
@@ -207,14 +207,14 @@ static void ogg_close_audio_file(void)
        oggbuf_len = 0;
 }
 
-static int ogg_save_header(FILE *file, int header_len)
+static int ogg_save_header(FILE *file, int len)
 {
        int ret;
 
-       header = para_malloc(header_len);
+       header = para_malloc(len);
        rewind(file);
-       ret = read(fileno(file), header, header_len);
-       if (ret != header_len)
+       ret = read(fileno(file), header, len);
+       if (ret != len)
                return -E_OGG_READ;
        return 1;
 }
index 00dac0e..1f2f78b 100644 (file)
@@ -273,20 +273,20 @@ static void *ortp_recv_parse_config(int argc, char **argv)
 static int ortp_recv_open(struct receiver_node *rn)
 {
        struct private_ortp_recv_data *pord;
-       struct ortp_recv_args_info *conf = rn->conf;
+       struct ortp_recv_args_info *c = rn->conf;
 
        rn->buf = para_calloc(CHUNK_SIZE);
 
        rn->private_data = para_calloc(sizeof(struct private_ortp_recv_data));
        pord = rn->private_data;
        pord->session = rtp_session_new(RTP_SESSION_RECVONLY);
-       PARA_NOTICE_LOG("receiving from %s:%d\n", conf->host_arg, conf->port_arg);
-       rtp_session_set_local_addr(pord->session, conf->host_arg, conf->port_arg);
+       PARA_NOTICE_LOG("receiving from %s:%d\n", c->host_arg, c->port_arg);
+       rtp_session_set_local_addr(pord->session, c->host_arg, c->port_arg);
        rtp_session_set_payload_type(pord->session, PAYLOAD_AUDIO_CONTINUOUS);
-       if (conf->jitter_compensation_arg) {
+       if (c->jitter_compensation_arg) {
                rtp_session_enable_adaptive_jitter_compensation(pord->session, TRUE);
                rtp_session_set_jitter_compensation(pord->session,
-                       conf->jitter_compensation_arg);
+                       c->jitter_compensation_arg);
        }
        return 1;
 }
diff --git a/para.h b/para.h
index e1b0d73..26e04c6 100644 (file)
--- a/para.h
+++ b/para.h
@@ -131,7 +131,7 @@ long unsigned tv2ms(const struct timeval*);
 void d2tv(double, struct timeval*);
 void tv_add(const struct timeval*, const struct timeval *, struct timeval *);
 void tv_scale(const unsigned long, const struct timeval *, struct timeval *);
-void tv_divide(const unsigned long div, const struct timeval *tv,
+void tv_divide(const unsigned long divisor, const struct timeval *tv,
        struct timeval *result);
 int tv_convex_combination(const long a, const struct timeval *tv1,
                const long b, const struct timeval *tv2,
index c30465e..b67b3d1 100644 (file)
--- a/sdl_gui.c
+++ b/sdl_gui.c
@@ -505,7 +505,7 @@ static SDLKey hit_key(const char *msg)
  */
 static int command_handler(void)
 {
-       FILE *pipe;
+       FILE *f;
        unsigned count = 0;
        char text[MAXLINE]="";
        char buf[MAXLINE]="";
@@ -521,15 +521,15 @@ static int command_handler(void)
        if (text[0] == '!') {
                if (text[1] == '\0')
                        return 1;
-               pipe = popen(text + 1, "r");
+               f = popen(text + 1, "r");
        } else {
                sprintf(buf, BINDIR "/para_client %s 2>&1", text);
-               pipe = popen(buf, "r");
+               f = popen(buf, "r");
        }
-       if (!pipe)
+       if (!f)
                return 0;
        fill_output_rect();
-       while(fgets(text, MAXLINE - 1, pipe)) {
+       while(fgets(text, MAXLINE - 1, f)) {
                int len;
 
                tab2space(text);
@@ -554,7 +554,7 @@ static int command_handler(void)
        update_all();
        hit_key("Hit any key to return");
 out:   fill_output_rect();
-       pclose(pipe);
+       pclose(f);
        return 1;
 }
 
@@ -585,14 +585,14 @@ SDL_Surface *load_jpg(void)
        SDL_RWops *rwop;
        int fds[3] = {0, 1, 0};
        pid_t pid;
-       FILE *pipe;
+       FILE *f;
 
        if (para_exec_cmdline_pid(&pid, args_info.pic_cmd_arg, fds) < 0)
                return NULL;
-       pipe = fdopen(fds[1], "r");
-       if (!pipe)
+       f = fdopen(fds[1], "r");
+       if (!f)
                return NULL;
-       if (!(rwop = SDL_RWFromFP(pipe, 0)))
+       if (!(rwop = SDL_RWFromFP(f, 0)))
                return NULL;
        return IMG_LoadJPG_RW(rwop);
 }
@@ -689,7 +689,7 @@ void update_status(char *buf)
  * Read stat line from pipe if pipe is ready, call update_status to
  * display information.
  */
-static int draw_status(int pipe)
+static int draw_status(int fd)
 {
        fd_set rfds;
        int ret;
@@ -698,11 +698,11 @@ static int draw_status(int pipe)
        tv.tv_sec = 0;
        tv.tv_usec = 3000000;
        FD_ZERO(&rfds);
-       FD_SET(pipe, &rfds);
-       ret = para_select(pipe + 1, &rfds, NULL, &tv);
+       FD_SET(fd, &rfds);
+       ret = para_select(fd + 1, &rfds, NULL, &tv);
        if (ret <= 0)
                return 0;
-       if (read_audiod_pipe(pipe, update_status) > 0)
+       if (read_audiod_pipe(fd, update_status) > 0)
                return 1;
        free(stat_items[SI_STATUS_BAR].content);
        stat_items[SI_STATUS_BAR].content =
@@ -739,7 +739,7 @@ static int configfile_exists(void)
  */
 int main(int argc, char *argv[])
 {
-       int i, ret, pipe;
+       int i, ret, fd;
        SDLKey sym;
 
        sdl_gui_cmdline_parser(argc, argv, &args_info);
@@ -759,7 +759,7 @@ int main(int argc, char *argv[])
        height = args_info.height_arg;
 //     printf("w=%i,h=%i,ret=%i, cf=%s\n", width, height, ret, args_info.config_file_arg);
        init_stat_items();
-       pipe = para_open_audiod_pipe(args_info.stat_cmd_arg);
+       fd = para_open_audiod_pipe(args_info.stat_cmd_arg);
        init_SDL();
        for (i = 0; fonts[i].name[0]; i++) {
                char buf[MAXLINE];
@@ -775,10 +775,10 @@ int main(int argc, char *argv[])
                update_input();
        }
        for (;;) {
-               ret = draw_status(pipe);
+               ret = draw_status(fd);
                if (ret < 0) {
-                       close(pipe);
-                       pipe = -1;
+                       close(fd);
+                       fd = -1;
                }
                if (SDL_QuitRequested())
                        clean_exit(0);
@@ -802,11 +802,9 @@ int main(int argc, char *argv[])
                                || sym == SDLK_COMPOSE
                                )
                                continue;
-                       if (pipe < 0) {
-//                             printf("closing pipe\n");
-                               kill(0, SIGINT);
-                               close(pipe);
-//                             printf("pipe closed\n");
+                       if (fd < 0) {
+                               kill(0, SIGINT);
+                               close(fd);
                        }
                        fill_input_rect();
                        update_input();
@@ -816,7 +814,7 @@ int main(int argc, char *argv[])
                        print_help();
                        update_pic();
                        SDL_UpdateRect(screen, 0, 0, 0, 0);
-                       pipe = para_open_audiod_pipe(args_info.stat_cmd_arg);
+                       fd = para_open_audiod_pipe(args_info.stat_cmd_arg);
                        break;
                }
        }
diff --git a/time.c b/time.c
index 34e3de9..d6e0708 100644 (file)
--- a/time.c
+++ b/time.c
@@ -106,16 +106,17 @@ void tv_scale(const unsigned long mult, const struct timeval *tv,
 /**
  * compute fraction of given struct timeval
  *
- * \param div the integer value to divide by
+ * \param divider the integer value to divide by
  * \param tv the timevalue to divide
  * \param result holds (1 / mult) * tv upon return
  */
-void tv_divide(const unsigned long div, const struct timeval *tv,
+void tv_divide(const unsigned long divisor, const struct timeval *tv,
        struct timeval *result)
 {
-       long unsigned q = tv->tv_usec / div;
-       result->tv_sec = tv->tv_sec / div;
-       result->tv_usec = (tv->tv_sec - result->tv_sec * div) * 1000 * 1000 / div;
+       long unsigned q = tv->tv_usec / divisor;
+       result->tv_sec = tv->tv_sec / divisor;
+       result->tv_usec = (tv->tv_sec - result->tv_sec * divisor)
+               * 1000 * 1000 / divisor;
        if (result->tv_usec + q >= 1000 * 1000) {
                result->tv_sec++;
                result->tv_usec = 1000 * 1000 - result->tv_usec - q;
diff --git a/write.c b/write.c
index 498dd78..7f29665 100644 (file)
--- a/write.c
+++ b/write.c
@@ -59,37 +59,37 @@ static struct writer_node_group *wng;
  */
 static void check_wav_pre_select(__a_unused struct sched *s, struct task *t)
 {
-       struct check_wav_task *cwt = t->private_data;
+       struct check_wav_task *wt = t->private_data;
        unsigned char *a;
 
-       if (*cwt->loaded < WAV_HEADER_LEN) {
-               t->ret = *cwt->eof? -E_PREMATURE_END : 1;
+       if (*wt->loaded < WAV_HEADER_LEN) {
+               t->ret = *wt->eof? -E_PREMATURE_END : 1;
                return;
        }
-       cwt->channels = 2;
-       cwt->samplerate = 44100;
-       a = (unsigned char*)cwt->buf;
+       wt->channels = 2;
+       wt->samplerate = 44100;
+       a = (unsigned char*)wt->buf;
        t->ret = -E_NO_WAV_HEADER;
        if (a[0] != 'R' || a[1] != 'I' || a[2] != 'F' || a[3] != 'F')
                return;
-       cwt->channels = (unsigned) a[22];
-       cwt->samplerate = a[24] + (a[25] << 8) + (a[26] << 16) + (a[27] << 24);
-       *cwt->loaded -= WAV_HEADER_LEN;
-       memmove(cwt->buf, cwt->buf + WAV_HEADER_LEN, *cwt->loaded);
+       wt->channels = (unsigned) a[22];
+       wt->samplerate = a[24] + (a[25] << 8) + (a[26] << 16) + (a[27] << 24);
+       *wt->loaded -= WAV_HEADER_LEN;
+       memmove(wt->buf, wt->buf + WAV_HEADER_LEN, *wt->loaded);
        t->ret = -E_WAV_HEADER_SUCCESS;
-       PARA_INFO_LOG("channels: %d, sample rate: %d\n", cwt->channels, cwt->samplerate);
+       PARA_INFO_LOG("channels: %d, sample rate: %d\n", wt->channels, wt->samplerate);
 }
 
 static void initial_delay_pre_select(struct sched *s, struct task *t)
 {
-       struct initial_delay_task *idt = t->private_data;
+       struct initial_delay_task *dt = t->private_data;
        struct timeval diff;
 
        t->ret = -E_NO_DELAY;
-       if (!idt->start_time.tv_sec && !idt->start_time.tv_usec)
+       if (!dt->start_time.tv_sec && !dt->start_time.tv_usec)
                return;
        t->ret = -E_DELAY_TIMEOUT;
-       if (tv_diff(now, &idt->start_time, &diff) > 0)
+       if (tv_diff(now, &dt->start_time, &diff) > 0)
                return;
        t->ret = 1;
        if (tv_diff(&s->timeout , &diff, NULL) > 0)
@@ -110,7 +110,7 @@ void para_log(int ll, const char* fmt,...)
 static struct writer_node_group *check_args(void)
 {
        int i, ret = -E_WRITE_SYNTAX;
-       struct writer_node_group *wng = NULL;
+       struct writer_node_group *g = NULL;
 
        if (conf.list_writers_given) {
                char *msg = NULL;
@@ -126,8 +126,6 @@ static struct writer_node_group *check_args(void)
                free(msg);
                exit(EXIT_SUCCESS);
        }
-//     if (conf.prebuffer_arg < 0 || conf.prebuffer_arg > 100)
-//             goto out;
        if (conf.start_time_given) {
                long unsigned sec, usec;
                if (sscanf(conf.start_time_arg, "%lu:%lu",
@@ -137,25 +135,25 @@ static struct writer_node_group *check_args(void)
                idt.start_time.tv_usec = usec;
        }
        if (!conf.writer_given) {
-               wng = setup_default_wng();
+               g = setup_default_wng();
                ret = 1;
                goto out;
        }
-       wng = wng_new(conf.writer_given);
+       g = wng_new(conf.writer_given);
        ret = -E_WRITE_SYNTAX;
        for (i = 0; i < conf.writer_given; i++) {
                int writer_num;
-               wng->writer_nodes[i].conf = check_writer_arg(
+               g->writer_nodes[i].conf = check_writer_arg(
                        conf.writer_arg[i], &writer_num);
-               if (!wng->writer_nodes[i].conf)
+               if (!g->writer_nodes[i].conf)
                        goto out;
-               wng->writer_nodes[i].writer = &writers[writer_num];
+               g->writer_nodes[i].writer = &writers[writer_num];
        }
        ret = 1;
 out:
        if (ret > 0)
-               return wng;
-       free(wng);
+               return g;
+       free(g);
        return NULL;
 }