diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/Makefile.am | 3 | ||||
| -rw-r--r-- | src/midifile.c | 104 | ||||
| -rw-r--r-- | src/midifile.h | 15 |
3 files changed, 98 insertions, 24 deletions
diff --git a/src/Makefile.am b/src/Makefile.am index 92095b5c..3874c35f 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -195,3 +195,6 @@ icon.c : ../data/doom.ico endif +midiread : midifile.c + $(CC) -DTEST $(CFLAGS) @LDFLAGS@ $^ -o $@ + diff --git a/src/midifile.c b/src/midifile.c index ed60958d..e4273c12 100644 --- a/src/midifile.c +++ b/src/midifile.c @@ -27,6 +27,7 @@ #include <stdlib.h> #include <string.h> +#include "doomdef.h" #include "doomtype.h" #include "i_swap.h" #include "midifile.h" @@ -39,15 +40,15 @@ typedef struct { byte chunk_id[4]; unsigned int chunk_size; -} chunk_header_t; +} PACKEDATTR chunk_header_t; typedef struct { chunk_header_t chunk_header; unsigned short format_type; unsigned short num_tracks; - unsigned int time_division; -} midi_header_t; + unsigned short time_division; +} PACKEDATTR midi_header_t; struct midi_file_s { @@ -65,12 +66,15 @@ static boolean CheckChunkHeader(chunk_header_t *chunk, { boolean result; - result = (strcmp((char *) chunk->chunk_id, expected_id) == 0); + result = (memcmp((char *) chunk->chunk_id, expected_id, 4) == 0); if (!result) { - fprintf(stderr, "CheckChunkHeader: Expected '%s' chunk header\n", - expected_id); + fprintf(stderr, "CheckChunkHeader: Expected '%s' chunk header, " + "got '%c%c%c%c'\n", + expected_id, + chunk->chunk_id[0], chunk->chunk_id[1], + chunk->chunk_id[2], chunk->chunk_id[3]); } return result; @@ -80,24 +84,26 @@ static boolean CheckChunkHeader(chunk_header_t *chunk, static boolean ReadHeaderChunk(midi_file_t *file) { - size_t bytes_read; + size_t records_read; - bytes_read = fread(&file->header, sizeof(midi_header_t), 1, file->stream); + records_read = fread(&file->header, sizeof(midi_header_t), 1, file->stream); - if (bytes_read < sizeof(midi_header_t)) + if (records_read < 1) { return false; } if (!CheckChunkHeader(&file->header.chunk_header, HEADER_CHUNK_ID) - || LONG(file->header.chunk_header.chunk_size) != 6) + || SDL_SwapBE32(file->header.chunk_header.chunk_size) != 6) { - fprintf(stderr, "ReadHeaderChunk: Invalid MIDI chunk header!\n"); + fprintf(stderr, "ReadHeaderChunk: Invalid MIDI chunk header! " + "chunk_size=%i\n", + SDL_SwapBE32(file->header.chunk_header.chunk_size)); return false; } - if (SHORT(file->header.format_type) != 0 - || SHORT(file->header.num_tracks) != 1) + if (SDL_SwapBE16(file->header.format_type) != 0 + || SDL_SwapBE16(file->header.num_tracks) != 1) { fprintf(stderr, "ReadHeaderChunk: Only single track, " "type 0 MIDI files supported!\n"); @@ -111,12 +117,12 @@ static boolean ReadHeaderChunk(midi_file_t *file) static boolean ReadTrackChunk(midi_file_t *file) { - size_t bytes_read; + size_t records_read; chunk_header_t chunk_header; - bytes_read = fread(&chunk_header, sizeof(chunk_header_t), 1, file->stream); + records_read = fread(&chunk_header, sizeof(chunk_header_t), 1, file->stream); - if (bytes_read < sizeof(chunk_header)) + if (records_read < 1) { return false; } @@ -126,7 +132,7 @@ static boolean ReadTrackChunk(midi_file_t *file) return false; } - file->data_len = LONG(chunk_header.chunk_size); + file->data_len = SDL_SwapBE32(chunk_header.chunk_size); return true; } @@ -375,6 +381,8 @@ static boolean ReadMetaEvent(midi_file_t *file, midi_event_t *event) { byte b; + event->event_type = MIDI_EVENT_META; + // Read meta event type: if (!ReadByte(file, &b)) @@ -464,3 +472,65 @@ boolean MIDI_ReadEvent(midi_file_t *file, midi_event_t *event) } } +#ifdef TEST + +int main(int argc, char *argv[]) +{ + midi_file_t *file; + midi_event_t event; + + if (argc < 2) + { + printf("Usage: %s <filename>\n", argv[0]); + exit(1); + } + + file = MIDI_OpenFile(argv[1]); + + if (file == NULL) + { + fprintf(stderr, "Failed to open %s\n", argv[1]); + exit(1); + } + + while (MIDI_ReadEvent(file, &event)) + { + printf("Event type: %i\n", event.event_type); + + switch(event.event_type) + { + case MIDI_EVENT_NOTE_OFF: + case MIDI_EVENT_NOTE_ON: + case MIDI_EVENT_AFTERTOUCH: + case MIDI_EVENT_CONTROLLER: + case MIDI_EVENT_PROGRAM_CHANGE: + case MIDI_EVENT_CHAN_AFTERTOUCH: + case MIDI_EVENT_PITCH_BEND: + printf("\tChannel: %i\n", event.data.channel.channel); + printf("\tParameter 1: %i\n", event.data.channel.param1); + printf("\tParameter 2: %i\n", event.data.channel.param2); + break; + + case MIDI_EVENT_SYSEX: + case MIDI_EVENT_SYSEX_SPLIT: + printf("\tLength: %i\n", event.data.sysex.length); + break; + + case MIDI_EVENT_META: + printf("\tMeta type: %i\n", event.data.meta.type); + printf("\tLength: %i\n", event.data.meta.length); + break; + } + + if (event.event_type == MIDI_EVENT_META + && event.data.meta.type == MIDI_META_END_OF_TRACK) + { + break; + } + } + + return 0; +} + +#endif + diff --git a/src/midifile.h b/src/midifile.h index d7df8b86..7928fdda 100644 --- a/src/midifile.h +++ b/src/midifile.h @@ -65,13 +65,14 @@ typedef enum MIDI_META_MARKER = 0x6, MIDI_META_CUE_POINT = 0x7, - MIDI_META_CHANNEL_PREFIX = 0x8, - MIDI_META_END_OF_TRACK = 0x9, - MIDI_META_SET_TEMPO = 0xa, - MIDI_META_SMPTE_OFFSET = 0xb, - MIDI_META_TIME_SIGNATURE = 0xc, - MIDI_META_KEY_SIGNATURE = 0xd, - MIDI_META_SEQUENCER_SPECIFIC = 0xe, + MIDI_META_CHANNEL_PREFIX = 0x20, + MIDI_META_END_OF_TRACK = 0x2f, + + MIDI_META_SET_TEMPO = 0x51, + MIDI_META_SMPTE_OFFSET = 0x54, + MIDI_META_TIME_SIGNATURE = 0x58, + MIDI_META_KEY_SIGNATURE = 0x59, + MIDI_META_SEQUENCER_SPECIFIC = 0x7f, } midi_meta_event_type_t; typedef struct |