added IT support
This commit is contained in:
Mathias Panzenböck
parent
1ea433512e
commit
d426b678d2
8
Makefile
8
Makefile
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@ -8,7 +8,8 @@ OBJ=\
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$(BUILDDIR)/id3.o \
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$(BUILDDIR)/midi.o \
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$(BUILDDIR)/mod.o \
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$(BUILDDIR)/s3m.o
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$(BUILDDIR)/s3m.o \
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$(BUILDDIR)/it.o
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CC=gcc
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CFLAGS=-Wall -std=gnu99 -O2 -fmessage-length=0 -g
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BIN=$(BUILDDIR)/audioextract
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@ -20,7 +21,7 @@ all: $(BIN)
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$(BIN): $(OBJ)
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$(CC) $(CFLAGS) $(OBJ) -o $@
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$(BUILDDIR)/audioextract.o: audioextract.c audioextract.h ogg.h wave.h mpeg.h id3.h midi.h mod.h s3m.h
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$(BUILDDIR)/audioextract.o: audioextract.c audioextract.h ogg.h wave.h mpeg.h id3.h midi.h mod.h s3m.h it.h
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$(CC) $(CFLAGS) $< -o $@ -c
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$(BUILDDIR)/wave.o: wave.c audioextract.h wave.h
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@ -44,6 +45,9 @@ $(BUILDDIR)/mod.o: mod.c audioextract.h mod.h
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$(BUILDDIR)/s3m.o: s3m.c audioextract.h s3m.h
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$(CC) $(CFLAGS) $< -o $@ -c
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$(BUILDDIR)/it.o: it.c audioextract.h it.h
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$(CC) $(CFLAGS) $< -o $@ -c
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install: all
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install -s -D $(BIN) "$(PREFIX)/bin/audioextract"
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@ -38,11 +38,14 @@ using the `--min-size` one can hopefully extract only real MPEG files.
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default the default set of formats (AIFF, ID3v2, Ogg, RIFF, MIDI, MOD)
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aiff big-endian (Apple) wave files
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id3v2 MPEG files with ID3v2 tags at the start
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it ImpulseTracker files
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midi MIDI files
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mod MOD files
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mod FastTracker files
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mpeg any MPEG files (e.g. MP3)
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ogg Ogg files (Vorbis, FLAC, Opus, Theora, etc.)
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riff little-endian (Windows) wave files
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s3m ScreamTracker files
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tracker all tracker files (MOD, S3M, IT)
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wave both RIFF and AIFF wave files
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WARNING: Because MPEG files do not have a nice file magic, using
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@ -57,7 +60,7 @@ using the `--min-size` one can hopefully extract only real MPEG files.
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removed from the set of formats to extract. E.g. extract
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everything except wave files:
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./build/audioextract --formats=all,-wave data.bin
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audioextract --formats=all,-wave data.bin
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-o, --output=DIR Directory where extracted files should be written. (default: ".")
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-m, --min-size=SIZE Minumum size of extracted files (skip smaller). (default: 0)
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@ -19,6 +19,7 @@
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#include "midi.h"
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#include "mod.h"
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#include "s3m.h"
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#include "it.h"
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enum fileformat {
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NONE = 0,
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@ -30,13 +31,14 @@ enum fileformat {
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MIDI = 32,
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MOD = 64,
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S3M = 128,
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IT = 256,
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// TODO:
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// IT = 256,
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// XM = 512,
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};
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#define ALL_FORMATS (OGG | RIFF | AIFF | MPEG | ID3v2 | MIDI | MOD | S3M)
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#define DEFAULT_FORMATS (OGG | RIFF | AIFF | ID3v2 | MIDI | MOD | S3M)
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#define ALL_FORMATS (OGG | RIFF | AIFF | MPEG | ID3v2 | MIDI | MOD | S3M | IT)
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#define DEFAULT_FORMATS (OGG | RIFF | AIFF | ID3v2 | MIDI | MOD | S3M | IT)
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#define TRACKER_FORMATS (MOD | S3M | IT)
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int usage(int argc, char **argv)
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{
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@ -56,11 +58,14 @@ int usage(int argc, char **argv)
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" default the default set of formats (AIFF, ID3v2, Ogg, RIFF, MIDI, MOD)\n"
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" aiff big-endian (Apple) wave files\n"
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" id3v2 MPEG files with ID3v2 tags at the start\n"
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" it ImpulseTracker files\n"
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" midi MIDI files\n"
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" mod MOD files\n"
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" mod FastTracker files\n"
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" mpeg any MPEG files (e.g. MP3)\n"
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" ogg Ogg files (Vorbis, FLAC, Opus, Theora, etc.)\n"
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" riff little-endian (Windows) wave files\n"
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" s3m ScreamTracker files\n"
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" tracker all tracker files (MOD, S3M, IT)\n"
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" wave both RIFF and AIFF wave files\n"
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"\n"
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" WARNING: Because MPEG files do not have a nice file magic, using\n"
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@ -128,6 +133,11 @@ const unsigned char *findmagic(const unsigned char *start, const unsigned char *
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*format = ID3v2;
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return start;
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}
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else if (formats & IT && magic == IT_MAGIC)
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{
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*format = IT;
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return start;
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}
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else if (formats & MPEG && IS_MPEG_MAGIC(start))
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{
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*format = MPEG;
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@ -388,6 +398,15 @@ int extract(const char *filepath, const char *outdir, size_t minsize, size_t max
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else ++ ptr;
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break;
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case IT:
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if (it_isfile(ptr, end, &length))
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{
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WRITE_FILE(ptr, length, "it");
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ptr += length;
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}
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else ++ ptr;
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break;
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case NONE:
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++ ptr;
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break;
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@ -472,6 +491,14 @@ int parse_formats(const char *formats)
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{
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mask = S3M;
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}
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else if (strncasecmp("it", start, len) == 0)
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{
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mask = IT;
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}
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else if (strncasecmp("tracker", start, len) == 0)
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{
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mask = TRACKER_FORMATS;
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}
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else if (strncasecmp("all", start, len) == 0)
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{
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mask = ALL_FORMATS;
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@ -0,0 +1,90 @@
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#include "it.h"
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int it_isfile(const unsigned char *start, const unsigned char *end, size_t *lengthptr)
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{
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size_t input_len = (size_t)(end - start);
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if (input_len < IT_HEADER_SIZE)
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return 0;
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if (MAGIC(start) != IT_MAGIC)
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return 0;
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uint16_t orders = le16toh(*(uint16_t *)(start + 0x20));
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uint16_t instruments = le16toh(*(uint16_t *)(start + 0x22));
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uint16_t samples = le16toh(*(uint16_t *)(start + 0x24));
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uint16_t patterns = le16toh(*(uint16_t *)(start + 0x26));
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size_t length = IT_HEADER_SIZE + orders + instruments * 4 + samples * 4 + patterns * 4;
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if (input_len < length)
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return 0;
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#define UPDATE_LENGTH(len) \
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{ \
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size_t _len = (len); \
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if (_len > length) \
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{ \
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length = _len; \
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if (input_len < length) \
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return 0; \
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} \
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}
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/* scan instruments */
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for (const uint32_t *para = (const uint32_t *)(start + IT_HEADER_SIZE + orders),
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*para_end = para + instruments;
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para < para_end; ++ para)
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{
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size_t off = (size_t)le32toh(*para);
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UPDATE_LENGTH(off + IT_INSTRUMENT_SIZE);
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}
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/* scan samples */
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for (const uint32_t *para = (const uint32_t *)(start + IT_HEADER_SIZE + orders + instruments * 4),
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*para_end = para + samples;
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para < para_end; ++ para)
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{
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size_t off = (size_t)le32toh(*para);
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const unsigned char *ptr = start + off;
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UPDATE_LENGTH(off + IT_SAMPLE_HEADER_SIZE);
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if (MAGIC(ptr) != IT_SAMPLE_MAGIC)
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continue;
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uint32_t sample_length = le32toh(*(uint32_t *)(ptr + 0x30));
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uint32_t sample_pointer = le32toh(*(uint32_t *)(ptr + 0x48));
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if (sample_length && sample_pointer)
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{
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size_t sample_end = sample_pointer + sample_length;
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// there are some IT files out there with truncated samples:
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if (sample_end > input_len) sample_end = input_len;
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if (sample_end > length) length = sample_end;
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}
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}
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/* scan patterns */
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for (const uint32_t *para = (const uint32_t *)(start + IT_HEADER_SIZE + orders + instruments * 4 + samples * 4),
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*para_end = para + patterns;
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para < para_end; ++ para)
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{
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size_t off = (size_t)le32toh(*para);
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const unsigned char *ptr = start + off;
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UPDATE_LENGTH(off + IT_PATTERN_HEADER_SIZE);
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uint16_t pattern_length = le32toh(*(uint16_t *)ptr);
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size_t pattern_end = off + IT_PATTERN_HEADER_SIZE + pattern_length;
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// there are some IT files out there with truncated patterns:
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if (pattern_end > input_len) pattern_end = input_len;
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if (pattern_end > length) length = pattern_end;
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}
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if (lengthptr) *lengthptr = length;
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return 1;
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}
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@ -0,0 +1,16 @@
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#ifndef AUDIOEXTRACT_IT_H__
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#define AUDIOEXTRACT_IT_H__
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#include "audioextract.h"
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#define IT_MAGIC MAGIC("IMPM")
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#define IT_INSTRUMENT_MAGIC MAGIC("IMPI")
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#define IT_SAMPLE_MAGIC MAGIC("IMPS")
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#define IT_HEADER_SIZE 192
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#define IT_INSTRUMENT_SIZE 554
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#define IT_SAMPLE_HEADER_SIZE 80
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#define IT_PATTERN_HEADER_SIZE 4
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int it_isfile(const unsigned char *start, const unsigned char *end, size_t *lengthptr);
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#endif /* AUDIOEXTRACT_IT_H__ */
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