/*
* This file is part of DisOrder
- * Copyright (C) 2005, 2007 Richard Kettlewell
+ * Copyright (C) 2005, 2007, 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
/** @brief Message type
*
* Messges from the main server:
- * - @ref SM_PREPARE
* - @ref SM_PLAY
* - @ref SM_PAUSE
* - @ref SM_RESUME
* - @ref SM_PAUSED
* - @ref SM_FINISHED
* - @ref SM_PLAYING
+ * - @ref SM_UNKNOWN
*/
int type;
};
/* messages from the main DisOrder server */
-/** @brief Prepare track @c id
- *
- * This message will include a file descriptor. The speaker starts buffering
- * audio data read from this file against the time that it must be played.
- */
-#define SM_PREPARE 0
/** @brief Play track @c id
*
/** @brief Finished playing track @c id */
#define SM_FINISHED 129
+/** @brief Never heard of track @c id */
+#define SM_UNKNOWN 130
+
/** @brief Currently track @c id, @c data seconds in
*
* This is sent from time to time while a track is playing.
*/
#define SM_PLAYING 131
-void speaker_send(int fd, const struct speaker_message *sm, int datafd);
-/* Send a message. DATAFD is passed too if not -1. Does not close DATAFD. */
-
-int speaker_recv(int fd, struct speaker_message *sm, int *datafd);
-/* Receive a message. If DATAFD is not null then can receive an FD. Return 0
- * on EOF, +ve if a message is read, -1 on EAGAIN, terminates on any other
- * error. */
+/** @brief Speaker process is ready
+ *
+ * This is sent once at startup when the speaker has finished its
+ * initialization. */
+#define SM_READY 132
+
+/** @brief Cancelled track @c id which wasn't playing */
+#define SM_STILLBORN 133
+
+void speaker_send(int fd, const struct speaker_message *sm);
+/* Send a message. */
+
+int speaker_recv(int fd, struct speaker_message *sm);
+/* Receive a message. Return 0 on EOF, +ve if a message is read, -1 on EAGAIN,
+ * terminates on any other error. */
+
+/** @brief One chunk in a stream */
+struct stream_header {
+ /** @brief Number of bytes */
+ uint32_t nbytes;
+
+ /** @brief Frames per second */
+ uint32_t rate;
+
+ /** @brief Samples per frames */
+ uint8_t channels;
+
+ /** @brief Bits per sample */
+ uint8_t bits;
+
+ /** @brief Endianness */
+ uint8_t endian;
+#define ENDIAN_BIG 1
+#define ENDIAN_LITTLE 2
+#ifdef WORDS_BIGENDIAN
+# define ENDIAN_NATIVE ENDIAN_BIG
+#else
+# define ENDIAN_NATIVE ENDIAN_LITTLE
+#endif
+} attribute((packed));
+
+static inline int formats_equal(const struct stream_header *a,
+ const struct stream_header *b) {
+ return (a->rate == b->rate
+ && a->channels == b->channels
+ && a->bits == b->bits
+ && a->endian == b->endian);
+}
#endif /* SPEAKER_PROTOCOL_H */