core rewrite (decode,player,outputBuffer,playlist)

This is a huge refactoring of the core mpd process.  The
queueing/buffering mechanism is heavily reworked.

The player.c code has been merged into outputBuffer (the actual
ring buffering logic is handled by ringbuf.c); and decode.c
actually handles decoding stuff.

The end result is several hundreds of lines shorter, even though
we still have a lot of DEBUG statements left in there for
tracing and a lot of assertions, too.

1 files changed, 53 insertions, 0 deletions

diff --git a/src/player_error.c b/src/player_error.c
new file mode 100644
index 000000000..4c7f7b9de
--- /dev/null
+++ b/src/player_error.c
@@ -0,0 +1,53 @@
+#include "player_error.h"
+#include "os_compat.h"
+#include "log.h"
+#include "path.h"
+
+enum player_error player_errno;
+Song *player_errsong;
+
+void player_clearerror(void)
+{
+	player_errno = PLAYER_ERROR_NONE;
+	player_errsong = NULL;
+}
+
+void player_seterror(enum player_error err, Song *song)
+{
+	if (player_errno)
+		ERROR("Clobbering existing error: %s\n", player_strerror());
+	player_errno = err;
+	player_errsong = song;
+}
+
+const char *player_strerror(void)
+{
+	/* static OK here, only one user in main task */
+	static char error[MPD_PATH_MAX + 64]; /* still too much */
+	char path_max_tmp[MPD_PATH_MAX];
+	*error = '\0'; /* likely */
+
+	switch (player_errno) {
+	case PLAYER_ERROR_NONE: break;
+	case PLAYER_ERROR_FILE:
+		snprintf(error, sizeof(error), "problems decoding \"%s\"",
+			 get_song_url(path_max_tmp, player_errsong));
+		break;
+	case PLAYER_ERROR_AUDIO:
+		strcpy(error, "problems opening audio device");
+		break;
+	case PLAYER_ERROR_SYSTEM:
+		strcpy(error, "system error occured");
+		break;
+	case PLAYER_ERROR_UNKTYPE:
+		snprintf(error, sizeof(error), "file type of \"%s\" is unknown",
+			 get_song_url(path_max_tmp, player_errsong));
+	case PLAYER_ERROR_FILENOTFOUND:
+		snprintf(error, sizeof(error),
+			 "file \"%s\" does not exist or is inaccessible",
+			 get_song_url(path_max_tmp, player_errsong));
+		break;
+	}
+	return *error ? error : NULL;
+}
+