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pw-cat: add midi support

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This commit is contained in:
Wim Taymans 2020-02-18 10:55:05 +01:00
parent 427a6316d3
commit fe616e38d8
4 changed files with 497 additions and 10 deletions
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88
src/tools/midifile.h Normal file
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/* 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);