Add btr support to the oggdec filter.
[paraslash.git] / grab_client.c
index 735e5b4..853dfba 100644 (file)
@@ -1,32 +1,26 @@
 /*
- * Copyright (C) 2006 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2006-2009 Andre Noll <maan@systemlinux.org>
  *
- *     This program is free software; you can redistribute it and/or modify
- *     it under the terms of the GNU General Public License as published by
- *     the Free Software Foundation; either version 2 of the License, or
- *     (at your option) any later version.
- *
- *     This program is distributed in the hope that it will be useful,
- *     but WITHOUT ANY WARRANTY; without even the implied warranty of
- *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *     GNU General Public License for more details.
- *
- *     You should have received a copy of the GNU General Public License
- *     along with this program; if not, write to the Free Software
- *     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
+ * Licensed under the GPL v2. For licencing details see COPYING.
  */
 
 /**
- * \file grab_client.c functions for grabbing the stream at any position
- * in a filter chain
+ * \file grab_client.c Functions for grabbing the stream at any position
+ * in a filter chain.
  *
- * \sa filter_chain filter_chain_info filter
+ * \sa filter_chain filter_chain_info filter.
  */
 
+#include <regex.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <stdbool.h>
+
 #include "para.h"
-#include "grab_client.cmdline.h"
 #include "list.h"
 #include "sched.h"
+#include "ggo.h"
+#include "buffer_tree.h"
 #include "filter.h"
 #include "grab_client.h"
 #include "audiod.h"
 #include "string.h"
 #include "fd.h"
 
-/** grab clients that are not yet attached to a filter node */
-struct list_head inactive_grab_client_list;
+/** Grab clients that are not yet attached to a filter node. */
+static struct list_head inactive_grab_client_list;
 
 static int max_num_filters(void)
 {
        int i, ret = 0;
+
        for (i = 0; audio_formats[i]; i++) {
                PARA_INFO_LOG("%s filter chain length: %d\n", audio_formats[i],
                        num_filters(i));
@@ -49,130 +44,96 @@ static int max_num_filters(void)
        return ret;
 }
 
-static int gc_write(char *buf, size_t len, struct filter_callback *fcb)
+static struct filter_node *find_filter_node(int format, int filternum)
 {
-       struct grab_client *gc = fcb->data;
-       struct timeval tv = {0, 100};
-       int ret;
+       int i;
 
-//     PARA_INFO_LOG("writing %d bytes to fd %d\n", len, gc->fd);
-       fd_set wfds;
-       FD_ZERO(&wfds);
-       FD_SET(gc->fd, &wfds);
-       ret = para_select(gc->fd + 1, NULL, &wfds, &tv);
-       if (ret <= 0) {
-               if (gc->mode == GRAB_PEDANTIC)
-                       return -E_PEDANTIC_GRAB;
-               if (gc->mode == GRAB_SLOPPY)
-                       return 1;
-       }
-rewrite:
-       ret = write(gc->fd, buf, len);
-       if (ret < 0) {
-               ret = -E_GC_WRITE;
-               gc->error = E_GC_WRITE;
-       } else {
-               if (ret != len) {
-                       if (gc->mode == GRAB_PEDANTIC)
-                               return -E_PEDANTIC_GRAB;
-                       if (gc->mode == GRAB_AGGRESSIVE) {
-                               len -= ret;
-                               memmove(buf, buf + ret, len);
-                               goto rewrite;
-                       }
-               }
+       FOR_EACH_SLOT(i) {
+               struct slot_info *s = &slot[i];
+               if (s->format < 0 || !s->fc)
+                       continue;
+               if (format >= 0 && s->format != format)
+                       continue;
+               if (num_filters(i) <= filternum)
+                       continue;
+               /* success */
+               return  s->fc->filter_nodes + filternum;
        }
-       return ret;
+       return NULL;
 }
 
-/* TODO: gengetopt can handle the grab client modes */
-static int check_gc_args(struct grab_client *gc)
+static int gc_write(char *buf, size_t len, struct filter_callback *fcb)
 {
-       int i;
-       struct grab_client_args_info *conf = gc->conf;
-       char **mv = grab_client_cmdline_parser_mode_values;
+       struct grab_client *gc = container_of(fcb, struct grab_client, fcb);
+       size_t written = 0;
 
-       PARA_INFO_LOG("filter_num: %d\n", gc->conf->filter_num_arg);
-       for (i = 0; mv[i]; i++)
-               if (!strcmp(conf->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 (gc->audio_format_num < 0)
-                       return gc->audio_format_num;
+       while (written < len) {
+               int ret = write_ok(gc->fd);
+               if (ret < 0)
+                       goto err;
+               if (ret == 0) { /* fd not ready */
+                       if (gc->mode == GM_PEDANTIC)
+                               goto err;
+                       if (gc->mode == GM_SLOPPY)
+                               return 1;
+               }
+               ret = write(gc->fd, buf + written, len - written);
+               if (ret < 0) {
+                       if (errno != EAGAIN && errno != EINTR)
+                               goto err;
+                       if (gc->mode == GM_PEDANTIC)
+                               goto err;
+                       if (gc->mode == GM_SLOPPY)
+                               return 1;
+               } else
+                       written += ret;
        }
-       if (conf->slot_arg > MAX_STREAM_SLOTS)
-               return -E_BAD_GC_SLOT;
-       if (conf->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)
-                       return -E_BAD_GC_FILTER_NUM;
-       } else
-               if (conf->filter_num_arg > max_num_filters())
-                       return -E_BAD_GC_FILTER_NUM;
-
        return 1;
+err:
+       gc->error = -E_GC_WRITE;
+       return -E_GC_WRITE;
 }
 
 static void add_inactive_gc(struct grab_client *gc)
 {
        PARA_INFO_LOG("adding grab client %p (fd %d) to inactive list\n",
                gc, gc->fd);
-       list_add(&gc->node, &inactive_grab_client_list);
-}
-
-static void gc_free(struct grab_client *gc)
-{
-       int i;
-
-       for (i = 0; i < gc->argc; i++)
-               free(gc->argv[i]);
-       free(gc->argv);
-       free(gc->conf);
-       free(gc);
-
+       para_list_add(&gc->node, &inactive_grab_client_list);
 }
 
 static void gc_close(struct filter_callback *fcb)
 {
-       struct grab_client *gc = fcb->data;
+       struct grab_client *gc = container_of(fcb, struct grab_client, fcb);
 
-       if (gc->conf->one_shot_given || gc->error) {
+       if ((gc->flags & GF_ONE_SHOT) || gc->error < 0) {
                PARA_INFO_LOG("closing fd %d (grab client %p)\n", gc->fd, gc);
                close(gc->fd);
-               gc_free(gc);
-               /* close on fork ?*/
+               free(gc);
                return;
        }
        add_inactive_gc(gc);
 }
 
 /**
- * move a grab client from the inactive list to a filter node
+ * Move a grab client from the inactive list to a filter node.
  *
- * \param gc the grab client to activate
- * \param fn the filter node \a gc gets attached to
+ * \param gc The grab client to activate.
+ * \param fn The filter node \a gc gets attached to.
  *
- * \sa filter_node::callbacks, inactive_grab_client_list
+ * \sa filter_node::callbacks, inactive_grab_client_list.
  */
 void activate_grab_client(struct grab_client *gc, struct filter_node *fn)
 {
        PARA_INFO_LOG("activating %p (fd %d, filter node: %p)\n", gc, gc->fd, fn);
        list_del(&gc->node);
-       list_add(&gc->fcb.node, &fn->callbacks);
+       para_list_add(&gc->fcb.node, &fn->callbacks);
 }
 
 /**
- * activate inactive grab clients if possible
+ * Activate inactive grab clients if possible.
  *
- * \param slot audiod's slot for the new audio file
- * \param audio_format_num the number of the audio format of the new audio file
- * \param filter_list the list of activated filters for that new audio file
+ * \param audio_format_num The number of the audio format of the new audio file.
+ * \param fc The filter chain containing the activated filters.
  *
  * This is called from audiod.c when the current audio file changes. It loops
  * over all inactive grab clients and checks each grab client's configuration
@@ -181,104 +142,137 @@ void activate_grab_client(struct grab_client *gc, struct filter_node *fn)
  * appropriate filter_node.
  *
  * \sa filter_chain_info::filters, inactive_grab_client_list,
- * activate_grab_client
+ * activate_grab_client.
  */
-void activate_inactive_grab_clients(int slot, int audio_format_num,
-               struct list_head *filter_list)
+void activate_inactive_grab_clients(int audio_format_num,
+               struct filter_chain *fc)
 {
        struct grab_client *gc, *tmp;
-       int i;
        struct filter_node *fn;
 
        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)
-                       continue;
                if (gc->audio_format_num >= 0 && gc->audio_format_num !=
                                audio_format_num)
                        continue;
-               if (gc->conf->filter_num_arg >= 0 &&
-                               num_filters(gc->audio_format_num)
-                               < gc->conf->filter_num_arg)
+               if (gc->filter_num >= num_filters(audio_format_num))
                        continue;
-               i = 1;
-               list_for_each_entry(fn, filter_list, node) {
-                       if (gc->conf->filter_num_arg <= 0
-                               || i == gc->conf->filter_num_arg)
-                               break;
+               fn = fc->filter_nodes + gc->filter_num;
+               activate_grab_client(gc, fn);
+       }
+}
+
+static int check_gc_args(int argc, char **argv, struct grab_client *gc)
+{
+       int i, ret;
+
+       gc->audio_format_num = -1; /* default: grab any audio format */
+       for (i = 1; i < argc; i++) {
+               const char *arg = argv[i];
+               if (arg[0] != '-')
+                       break;
+               if (!strcmp(arg, "--")) {
                        i++;
+                       break;
                }
-               activate_grab_client(gc, fn);
+               if (!strncmp(arg, "-n=", 3)) {
+                       ret = para_atoi32(arg + 3, &gc->filter_num);
+                       if (ret < 0)
+                               return ret;
+                       if (gc->filter_num < 0)
+                               return -E_BAD_GC_FILTER_NUM;
+                       if (gc->filter_num >= max_num_filters())
+                               return -E_BAD_GC_FILTER_NUM;
+                       continue;
+               }
+               if (!strncmp(arg, "-m", 2)) {
+                       if (*(arg + 3))
+                               return -E_GC_SYNTAX;
+                       switch(*(arg + 2)) {
+                       case 's':
+                               gc->mode = GM_SLOPPY;
+                               continue;
+                       case 'a':
+                               gc->mode = GM_AGGRESSIVE;
+                               continue;
+                       case 'p':
+                               gc->mode = GM_PEDANTIC;
+                               continue;
+                       default:
+                               return -E_GC_SYNTAX;
+                       }
+               }
+               if (!strcmp(arg, "-i")) {
+                       gc->flags |= GF_INPUT_GRAB;
+                       continue;
+               }
+               if (!strcmp(arg, "-o")) {
+                       gc->flags |= GF_ONE_SHOT;
+                       continue;
+               }
+               if (!strncmp(arg, "-f=", 3)) {
+                       ret = get_audio_format_num(arg + 3);
+                       if (ret < 0)
+                               return ret;
+                       gc->audio_format_num = ret;
+                       continue;
+               }
+               return -E_GC_SYNTAX;
        }
+       if (i != argc)
+               return -E_GC_SYNTAX;
+       return 1;
 }
 
 /**
- * check the command line options and allocate a grab_client structure
+ * Check the command line options and allocate a grab_client structure.
  *
- * \param fd the file descriptor of the client
- * \param line the command line
- * \param err non-zero if an error occured
+ * \param fd The file descriptor of the client.
+ * \param argc Argument count.
+ * \param argv Argument vector.
  *
  * If the command line options given by \a argc and \a argv are valid.
  * allocate a struct grab_client and initialize it with this valid
  * configuration. Moreover, add the new grab client to the inactive list.
  *
- * \return On success, this function returns a pointer to the newly created
- * struct. On errors, it returns NULL and sets \a err appropriately.
+ * \return Standard.
  *
  * \sa grab_client, inactive_grab_client_list, activate_grab_client,
- * filter_node::callbacks
- */
-/*
- * argc, argv get freed when com_grab() returns, so we have to make a
- * copy.
+ * filter_node::callbacks.
  */
-struct grab_client *grab_client_new(int fd, char *line, int *err)
+int grab_client_new(int fd, int argc, char **argv)
 {
        int ret;
        struct grab_client *gc = para_calloc(sizeof(struct grab_client));
+       struct filter_node *fn;
 
-       gc->conf = para_calloc(sizeof(struct grab_client_args_info));
-
-       ret = grab_client_cmdline_parser_string(line, gc->conf, "grab");
-       *err = -E_GC_SYNTAX;
-       if (ret)
-               goto err_out;
-       *err = -E_GC_HELP_GIVEN;
-       if (gc->conf->help_given)
-               goto err_out;
-       *err = -E_GC_VERSION_GIVEN;
-       if (gc->conf->version_given)
+       ret = check_gc_args(argc, argv, gc);
+       if (ret < 0)
                goto err_out;
-       *err = check_gc_args(gc);
-       if (*err < 0)
-               goto err_out;
-       if (gc->conf->input_grab_given) {
+       if (gc->flags & GF_INPUT_GRAB)
                gc->fcb.input_cb = gc_write;
-               gc->fcb.output_cb = NULL;
-       } else {
+       else
                gc->fcb.output_cb = gc_write;
-               gc->fcb.input_cb = NULL;
-       }
        gc->fd = fd;
        gc->fcb.close = gc_close;
-       gc->fcb.data = gc;
-       add_inactive_gc(gc);
-       return gc;
+       fn = find_filter_node(gc->audio_format_num, gc->filter_num);
+       if (fn)
+               para_list_add(&gc->fcb.node, &fn->callbacks);
+       else
+               add_inactive_gc(gc);
+       return 1;
 err_out:
-       free(gc->conf);
        free(gc);
-       return NULL;
+       return ret;
 }
 
-/** initialize the grabbing subsystem.
+/**
+ * Initialize the grabbing subsystem.
  *
  * This has to be called once during startup before any other function from
  * grab_client.c may be used. It initializes \a inactive_grab_client_list.
  */
-void init_grabbing()
+void init_grabbing(void)
 {
-       PARA_INFO_LOG("%s", "grab init\n");
+       PARA_INFO_LOG("grab init\n");
        INIT_LIST_HEAD(&inactive_grab_client_list);
 }
-