/*
* This file is part of DisOrder
- * Copyright (C) 2005, 2006, 2007 Richard Kettlewell
+ * Copyright (C) 2005-2008 Richard Kettlewell
*
* 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
#define FRAMES 4096
/** @brief Bytes to send per network packet
+ *
+ * This is the maximum number of bytes we pass to write(2); to determine actual
+ * packet sizes, add a UDP header and an IP header (and a link layer header if
+ * it's the link layer size you care about).
*
* Don't make this too big or arithmetic will start to overflow.
*/
-#define NETWORK_BYTES (1024+sizeof(struct rtp_header))
-
-/** @brief Maximum RTP playahead (ms) */
-#define RTP_AHEAD_MS 1000
+#define NETWORK_BYTES (1500-8/*UDP*/-40/*IP*/-8/*conservatism*/)
/** @brief Maximum number of FDs to poll for */
#define NFDS 256
/** @brief Slot in @ref fds */
int slot;
+ /** @brief Set when playable
+ *
+ * A track becomes playable whenever it fills its buffer or reaches EOF; it
+ * stops being playable when it entirely empties its buffer. Tracks start
+ * out life not playable.
+ */
+ int playable;
+
/** @brief Input buffer
*
* 1Mbyte is enough for nearly 6s of 44100Hz 16-bit stereo
void (*deactivate)(void);
/** @brief Called before poll()
+ * @param timeoutp Pointer to timeout
+ *
+ * Called before the call to poll().
+ *
+ * If desirable, should call addfd() to update the FD array and stash the
+ * slot number somewhere safe. This will only be called if @ref device_state
+ * is @ref device_open.
+ *
+ * @p timeoutp points to the poll timeout value in milliseconds. It may be
+ * reduced, but never increased.
*
- * Called before the call to poll(). Should call addfd() to update
- * the FD array and stash the slot number somewhere safe. This will
- * only be called if @ref device_state = @ref device_open.
+ * NB you can NOT assume that @c beforepoll is always called before @c play.
*/
- void (*beforepoll)(void);
+ void (*beforepoll)(int *timeoutp);
/** @brief Called after poll()
* @return 1 if output device ready for play, 0 otherwise
extern const struct speaker_backend alsa_backend;
extern const struct speaker_backend command_backend;
extern const struct speaker_backend coreaudio_backend;
+extern const struct speaker_backend oss_backend;
extern struct pollfd fds[NFDS];
extern int fdno;