pw-cat: add midi supportmidi

1 files changed, 88 insertions, 0 deletions

diff --git a/src/tools/midifile.h b/src/tools/midifile.h
new file mode 100644
index 00000000..8c600383
--- /dev/null
+++ b/src/tools/midifile.h
@@ -0,0 +1,88 @@
+/* PipeWire
+ *
+ * Copyright © 2020 Wim Taymans
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdio.h>
+
+#include <spa/utils/defs.h>
+#include <spa/utils/list.h>
+
+struct midi_event {
+	struct spa_list link;
+
+	struct midi_track *track;
+
+	int64_t tick;
+	uint8_t status;
+	uint8_t meta;
+	uint32_t offset;
+	size_t size;
+};
+
+struct midi_track {
+	struct spa_list link;
+
+	uint32_t start;
+	uint32_t size;
+
+	uint32_t offset;
+	int64_t tick;
+	uint8_t running_status;
+	unsigned int eof:1;
+
+	struct spa_list events;
+};
+
+struct midi_events {
+	int (*read) (void *data, size_t offset, void *buf, size_t size);
+	int (*write) (void *data, size_t offset, void *buf, size_t size);
+};
+
+struct midi_file {
+	uint32_t size;
+	uint16_t format;
+	uint16_t ntracks;
+	uint16_t division;
+	uint32_t tempo;
+
+	struct spa_list tracks;
+
+	uint32_t offset;
+	int64_t tick;
+
+	const struct midi_events *events;
+	void *data;
+};
+
+int midi_file_open(struct midi_file *mf, int mode,
+		const struct midi_events *events, void *data);
+int midi_file_close(struct midi_file *mf);
+
+int midi_file_add_track(struct midi_file *mf, struct midi_track *track);
+
+int midi_file_peek_event(struct midi_file *mf, struct midi_event *event);
+int midi_file_consume_event(struct midi_file *mf, struct midi_event *event);
+
+int midi_file_add_event(struct midi_file *mf, struct midi_track *track, struct midi_event *event);
+
+