/*
- * Copyright (C) 2005-2007 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2012 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 recv.h receiver-related structures and exported symbols of recv_common.c */
+/** \file recv.h Receiver-related structures and exported symbols of recv_common.c. */
/**
- * describes one instance of a receiver
+ * Describes one instance of a receiver.
*/
struct receiver_node {
- /** points to the corresponding receiver */
+ /** Points to the corresponding receiver. */
struct receiver *receiver;
- /** the output buffer */
- char *buf;
- /** the amount of bytes in \a buf */
- size_t loaded;
- /** receiver-specific data */
+ /** Receiver-specific data. */
void *private_data;
- /** set to 1 if end of file is reached */
- int eof;
- /** pointer to the eof member of the consumer */
- int *output_eof;
- /** pointer to the configuration data for this instance */
+ /** Pointer to the configuration data for this instance. */
void *conf;
- /** the task associated with this instance */
+ /** The task associated with this instance. */
struct task task;
+ /** The receiver node is always the root of the buffer tree. */
+ struct btr_node *btrn;
+ /** Each receiver node maintains a buffer pool for the received data. */
+ struct btr_pool *btrp;
+ /**
+ * The file descriptor to receive the stream.
+ *
+ * The pre_select function of the receiver adds this file descriptor to
+ * the set of file descriptors which are watched for readability or
+ * writability, depending on the state of the connection (if any).
+ *
+ * If \a fd is readable, the post_select function of the receiver reads
+ * data from this fd into the buffer pool area of \a btrp.
+ *
+ * \sa \ref receiver.
+ */
+ int fd;
};
/**
- * describes one supported paraslash receiver
+ * Describes one supported paraslash receiver.
*
- * \sa http_recv.c, ortp_recv.c
+ * \sa http_recv.c, udp_recv.c
*/
struct receiver {
-/**
- * the name of the receiver
- */
+ /**
+ * The name of the receiver.
+ */
const char *name;
-/**
- * the receiver init function
- *
- * It must fill in all other function pointers and is assumed to succeed.
- *
- * \sa http_recv_init ortp_recv_init
- */
+ /**
+ * The receiver init function.
+ *
+ * It must fill in all other function pointers and is assumed to succeed.
+ *
+ * \sa http_recv_init udp_recv_init.
+ */
void (*init)(struct receiver *r);
-/**
- * the command line parser of the receiver
- *
- * It should check whether the command line options given by \a argc and \a
- * argv are valid. On success, it should return a pointer to the
- * receiver-specific configuration data determined by \a argc and \a argv.
- * Note that this might be called more than once with different values of
- * \a argc and \a argv.
- */
- void * (*parse_config)(int argc, char **argv);
-/**
- * open one instance of the receiver
- *
- * This should allocate the output buffer of \a rn. and may also perform any
- * other work necessary for retrieving the stream according to the
- * configuration stored in the \a conf member of \a rn which is guaranteed to
- * point to valid configuration data (as previously obtained from the config
- * parser).
- *
- * \sa receiver_node::conf, receiver_node::buf
- */
+ /**
+ * The command line parser of the receiver.
+ *
+ * It should check whether the command line options given by \a argc and \a
+ * argv are valid. On success, it should return a pointer to the
+ * receiver-specific configuration data determined by \a argc and \a argv.
+ * Note that this might be called more than once with different values of
+ * \a argc and \a argv.
+ */
+ void *(*parse_config)(int argc, char **argv);
+ /**
+ * Deallocate the configuration structure of a receiver node.
+ *
+ * This calls the receiver-specific cleanup function generated by
+ * gengetopt.
+ */
+ void (*free_config)(void *conf);
+ /**
+ * Open one instance of the receiver.
+ *
+ * This should allocate the output buffer of \a rn. and may also
+ * perform any other work necessary for retrieving the stream according
+ * to the configuration stored in the \a conf member of \a rn which is
+ * guaranteed to point to valid configuration data (as previously
+ * obtained from the config parser).
+ *
+ * \sa receiver_node::conf, receiver_node::buf.
+ */
int (*open)(struct receiver_node *rn);
-/**
- * close this instance of the receiver
- *
- * It should free all resources associated with given receiver node that were
- * allocated during the corresponding open call.
- *
- * \sa receiver_node
- */
+ /**
+ * Close this instance of the receiver.
+ *
+ * It should free all resources associated with given receiver node
+ * that were allocated during the corresponding open call.
+ *
+ * \sa receiver_node.
+ */
void (*close)(struct receiver_node *rn);
-/**
- * deactivate the receiver
- *
- * Clean up what init has allocated.
- */
- void (*shutdown)(void);
-/**
- * add file descriptors to fd_sets and compute timeout for select(2)
- *
- * The pre_select function gets called from the driving application before
- * entering its select loop. The receiver may use this hook to add any file
- * descriptors to the sets of file descriptors given by \a s.
- *
- * \sa select(2), time.c struct task, struct sched
- */
+ /**
+ * Add file descriptors to fd_sets and compute timeout for select(2).
+ *
+ * The pre_select function gets called from the driving application
+ * before entering its select loop. The receiver may use this hook to
+ * add any file descriptors to the sets of file descriptors given by \a
+ * s.
+ *
+ * \sa select(2), time.c struct task, struct sched.
+ */
void (*pre_select)(struct sched *s, struct task *t);
-/**
- * evaluate the result from select()
- *
- * This hook gets called after the call to select(). It should check all file
- * descriptors which were added to any of the the fd sets during the previous
- * call to pre_select. According to the result, it may then use any
- * non-blocking I/O to establish a connection or to receive the audio data.
- *
- * \sa select(2), struct receiver
- */
+ /**
+ * Evaluate the result from select().
+ *
+ * This hook gets called after the call to select(). It should check
+ * all file descriptors which were added to any of the fd sets during
+ * the previous call to pre_select. According to the result, it may
+ * then use any non-blocking I/O to establish a connection or to
+ * receive the audio data.
+ *
+ * \sa select(2), struct receiver.
+ */
void (*post_select)(struct sched *s, struct task *t);
+
+ /** The two help texts of this receiver. */
+ struct ggo_help help;
};
+/** Define an array of all available receivers. */
+#define DEFINE_RECEIVER_ARRAY struct receiver receivers[] = { \
+ HTTP_RECEIVER \
+ DCCP_RECEIVER \
+ UDP_RECEIVER \
+ {.name = NULL}};
+
+/** Iterate over all available receivers. */
+#define FOR_EACH_RECEIVER(i) for (i = 0; receivers[i].name; i++)
+
+void recv_init(void);
+void *check_receiver_arg(char *ra, int *receiver_num);
+void print_receiver_helps(int detailed);
+int generic_recv_pre_select(struct sched *s, struct task *t);
-/** \cond */
+/** \cond receiver */
extern void http_recv_init(struct receiver *r);
#define HTTP_RECEIVER {.name = "http", .init = http_recv_init},
extern void dccp_recv_init(struct receiver *r);
#define DCCP_RECEIVER {.name = "dccp", .init = dccp_recv_init},
-
-#ifdef HAVE_ORTP
-extern void ortp_recv_init(struct receiver *r);
-#define ORTP_RECEIVER {.name = "ortp", .init = ortp_recv_init},
-#else
-#define ORTP_RECEIVER
-#endif
+extern void udp_recv_init(struct receiver *r);
+#define UDP_RECEIVER {.name = "udp", .init = udp_recv_init},
extern struct receiver receivers[];
-/** \endcond */
+/** \endcond receiver */
-/** define an array of all available receivers */
-#define DEFINE_RECEIVER_ARRAY struct receiver receivers[] = { \
- HTTP_RECEIVER \
- DCCP_RECEIVER \
- ORTP_RECEIVER \
- {.name = NULL}};
-
-void *check_receiver_arg(char *ra, int *receiver_num);
projects / paraslash.git / blobdiff