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pw-cat: read midi file from memory

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mmap the midi file and read from memory. Simplifies some things and
allows us to potentially parse from the RT thread later.
This commit is contained in:
Wim Taymans 2020-02-19 09:58:47 +01:00
parent 632c8440f8
commit ddcb08a98a
3 changed files with 101 additions and 129 deletions
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29
src/tools/midifile.h
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@ -35,17 +35,18 @@ struct midi_event {
double sec;
uint8_t status;
uint8_t meta;
uint32_t offset;
size_t size;
uint8_t *data;
uint32_t size;
};
struct midi_track {
struct spa_list link;
uint32_t start;
uint8_t *data;
uint32_t size;
uint32_t offset;
uint8_t *p;
int64_t tick;
uint8_t running_status;
unsigned int eof:1;
@ -53,13 +54,11 @@ struct midi_track {
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;
uint8_t *data;
size_t size;
uint32_t length;
uint16_t format;
uint16_t ntracks;
uint16_t division;
@ -67,18 +66,14 @@ struct midi_file {
struct spa_list tracks;
uint32_t offset;
uint8_t *p;
int64_t tick;
double tick_sec;
double tick_start;
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_init(struct midi_file *mf, const char *mode,
void *data, size_t size);
int midi_file_add_track(struct midi_file *mf, struct midi_track *track);