mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-13 23:31:05 +01:00
295 lines
11 KiB
C
295 lines
11 KiB
C
#include "meta.h"
|
|
#include "../layout/layout.h"
|
|
|
|
|
|
/* for reading integers inexplicably packed into 80-bit ('double extended') floats */
|
|
static uint32_t read80bitSANE(off_t offset, STREAMFILE *streamFile) {
|
|
uint8_t buf[10];
|
|
int32_t exponent;
|
|
int32_t mantissa;
|
|
int i;
|
|
|
|
if (read_streamfile(buf,offset,10,streamFile) != 10) return 0;
|
|
|
|
exponent = ((buf[0]<<8)|(buf[1]))&0x7fff;
|
|
exponent -= 16383;
|
|
|
|
mantissa = 0;
|
|
for (i=0;i<8;i++) {
|
|
int32_t shift = exponent-7-i*8;
|
|
if (shift >= 0)
|
|
mantissa |= buf[i+2] << shift;
|
|
else if (shift > -8)
|
|
mantissa |= buf[i+2] >> -shift;
|
|
}
|
|
|
|
return mantissa*((buf[0]&0x80)?-1:1);
|
|
}
|
|
|
|
static uint32_t find_marker(STREAMFILE *streamFile, off_t MarkerChunkOffset, int marker_id) {
|
|
uint16_t marker_count;
|
|
int i;
|
|
off_t marker_offset;
|
|
|
|
marker_count = read_16bitBE(MarkerChunkOffset+8,streamFile);
|
|
marker_offset = MarkerChunkOffset+10;
|
|
for (i=0;i<marker_count;i++) {
|
|
int name_length;
|
|
|
|
if (read_16bitBE(marker_offset,streamFile) == marker_id)
|
|
return read_32bitBE(marker_offset+2,streamFile);
|
|
|
|
name_length = (uint8_t)read_8bit(marker_offset+6,streamFile) + 1;
|
|
if (name_length % 2) name_length++;
|
|
marker_offset += 6 + name_length;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
|
|
/* Audio Interchange File Format AIFF/AIFF-C - from Mac/3DO games */
|
|
VGMSTREAM * init_vgmstream_aifc(STREAMFILE *streamFile) {
|
|
VGMSTREAM * vgmstream = NULL;
|
|
off_t start_offset = 0;
|
|
size_t file_size;
|
|
coding_t coding_type = 0;
|
|
int channel_count = 0, sample_count = 0, sample_size = 0, sample_rate = 0;
|
|
int interleave = 0;
|
|
|
|
int loop_flag = 0;
|
|
int32_t loop_start = 0, loop_end = 0;
|
|
|
|
int is_aiff_ext = 0, is_aifc_ext = 0, is_aiff = 0, is_aifc = 0;
|
|
int FormatVersionChunkFound = 0, CommonChunkFound = 0, SoundDataChunkFound = 0, MarkerChunkFound = 0, InstrumentChunkFound = 0;
|
|
off_t MarkerChunkOffset = -1, InstrumentChunkOffset = -1;
|
|
|
|
|
|
/* checks */
|
|
/* .aif: common (AIFF or AIFC), .aiff: common AIFF, .aifc: common AIFC
|
|
* .cbd2: M2 games
|
|
* .bgm: Super Street Fighter II Turbo (3DO)
|
|
* .acm: Crusader - No Remorse (SAT)
|
|
* .adp: Sonic Jam (SAT)
|
|
* .ai: Dragon Force (SAT)
|
|
* .aifcl/aiffl: for plugins? */
|
|
if (check_extensions(streamFile, "aif")) {
|
|
is_aifc_ext = 1;
|
|
is_aiff_ext = 1;
|
|
}
|
|
else if (check_extensions(streamFile, "aifc,aifcl,afc,cbd2,bgm")) {
|
|
is_aifc_ext = 1;
|
|
}
|
|
else if (check_extensions(streamFile, "aiff,acm,adp,ai,aiffl")) {
|
|
is_aiff_ext = 1;
|
|
}
|
|
else {
|
|
goto fail;
|
|
}
|
|
|
|
file_size = get_streamfile_size(streamFile);
|
|
if ((uint32_t)read_32bitBE(0x00,streamFile) != 0x464F524D && /* "FORM" */
|
|
(uint32_t)read_32bitBE(0x04,streamFile)+0x08 != file_size)
|
|
goto fail;
|
|
|
|
if ((uint32_t)read_32bitBE(0x08,streamFile) == 0x41494643) { /* "AIFC" */
|
|
if (!is_aifc_ext) goto fail;
|
|
is_aifc = 1;
|
|
}
|
|
else if ((uint32_t)read_32bitBE(0x08,streamFile) == 0x41494646) { /* "AIFF" */
|
|
if (!is_aiff_ext) goto fail;
|
|
is_aiff = 1;
|
|
}
|
|
else {
|
|
goto fail;
|
|
}
|
|
|
|
|
|
/* read through chunks to verify format and find metadata */
|
|
{
|
|
off_t current_chunk = 0x0c; /* start with first chunk within FORM */
|
|
|
|
while (current_chunk < file_size) {
|
|
uint32_t chunk_type = read_32bitBE(current_chunk,streamFile);
|
|
off_t chunk_size = read_32bitBE(current_chunk+0x04,streamFile);
|
|
|
|
/* chunks must be padded to an even number of bytes but chunk
|
|
* size does not include that padding */
|
|
if (chunk_size % 2) chunk_size++;
|
|
|
|
if (current_chunk+8+chunk_size > file_size) goto fail;
|
|
|
|
switch(chunk_type) {
|
|
case 0x46564552: /* "FVER" (version info) */
|
|
if (FormatVersionChunkFound) goto fail;
|
|
if (is_aiff) goto fail; /* plain AIFF shouldn't have */
|
|
FormatVersionChunkFound = 1;
|
|
|
|
/* specific size */
|
|
if (chunk_size != 4) goto fail;
|
|
|
|
/* Version 1 of AIFF-C spec timestamp */
|
|
if ((uint32_t)read_32bitBE(current_chunk+0x08,streamFile) != 0xA2805140) goto fail;
|
|
break;
|
|
|
|
case 0x434F4D4D: /* "COMM" (main header) */
|
|
if (CommonChunkFound) goto fail;
|
|
CommonChunkFound = 1;
|
|
|
|
channel_count = read_16bitBE(current_chunk+8,streamFile);
|
|
if (channel_count <= 0) goto fail;
|
|
|
|
sample_count = (uint32_t)read_32bitBE(current_chunk+0x0a,streamFile); /* sometimes number of blocks */
|
|
sample_size = read_16bitBE(current_chunk+0x0e,streamFile);
|
|
sample_rate = read80bitSANE(current_chunk+0x10,streamFile);
|
|
|
|
if (is_aifc) {
|
|
switch (read_32bitBE(current_chunk+0x1a,streamFile)) {
|
|
case 0x53445832: /* "SDX2" [3DO games: Super Street Fighter II Turbo (3DO), etc] */
|
|
coding_type = coding_SDX2;
|
|
interleave = 0x01;
|
|
break;
|
|
case 0x43424432: /* "CBD2" [M2 (arcade 3DO) games: IMSA Racing (M2), etc] */
|
|
coding_type = coding_CBD2;
|
|
interleave = 0x01;
|
|
break;
|
|
case 0x41445034: /* "ADP4" */
|
|
coding_type = coding_DVI_IMA_int;
|
|
if (channel_count != 1) break; /* don't know how stereo DVI is laid out */
|
|
break;
|
|
case 0x696D6134: /* "ima4" [Alida (PC), Lunar SSS (iOS)] */
|
|
coding_type = coding_APPLE_IMA4;
|
|
interleave = 0x22;
|
|
sample_count = sample_count * ((interleave-0x2)*2);
|
|
break;
|
|
default:
|
|
VGM_LOG("AIFC: unknown codec\n");
|
|
goto fail;
|
|
}
|
|
/* string size and human-readable AIFF-C codec follows */
|
|
}
|
|
else if (is_aiff) {
|
|
switch (sample_size) {
|
|
case 8:
|
|
coding_type = coding_PCM8;
|
|
interleave = 1;
|
|
break;
|
|
case 16:
|
|
coding_type = coding_PCM16BE;
|
|
interleave = 2;
|
|
break;
|
|
case 4: /* Crusader: No Remorse (SAT), Road Rash (3DO) */
|
|
coding_type = coding_XA;
|
|
break;
|
|
default:
|
|
VGM_LOG("AIFF: unknown codec\n");
|
|
goto fail;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 0x53534E44: /* "SSND" (main data) */
|
|
case 0x4150434D: /* "APCM" (main data for XA) */
|
|
if (SoundDataChunkFound) goto fail;
|
|
SoundDataChunkFound = 1;
|
|
|
|
start_offset = current_chunk + 0x10 + read_32bitBE(current_chunk+0x08,streamFile);
|
|
/* when "APCM" XA frame size is at 0x0c, fixed to 0x914 */
|
|
break;
|
|
|
|
case 0x4D41524B: /* "MARK" (loops) */
|
|
if (MarkerChunkFound) goto fail;
|
|
MarkerChunkFound = 1;
|
|
|
|
MarkerChunkOffset = current_chunk;
|
|
break;
|
|
|
|
case 0x494E5354: /* "INST" (loops) */
|
|
if (InstrumentChunkFound) goto fail;
|
|
InstrumentChunkFound = 1;
|
|
|
|
InstrumentChunkOffset = current_chunk;
|
|
break;
|
|
|
|
default:
|
|
/* spec says we can skip unrecognized chunks */
|
|
break;
|
|
}
|
|
|
|
current_chunk += 0x08+chunk_size;
|
|
}
|
|
}
|
|
|
|
if (is_aifc) {
|
|
if (!FormatVersionChunkFound || !CommonChunkFound || !SoundDataChunkFound)
|
|
goto fail;
|
|
} else if (is_aiff) {
|
|
if (!CommonChunkFound || !SoundDataChunkFound)
|
|
goto fail;
|
|
}
|
|
|
|
|
|
/* read loop points */
|
|
if (InstrumentChunkFound && MarkerChunkFound) {
|
|
int start_marker;
|
|
int end_marker;
|
|
/* use the sustain loop */
|
|
/* if playMode=ForwardLooping */
|
|
if (read_16bitBE(InstrumentChunkOffset+16,streamFile) == 1) {
|
|
start_marker = read_16bitBE(InstrumentChunkOffset+18,streamFile);
|
|
end_marker = read_16bitBE(InstrumentChunkOffset+20,streamFile);
|
|
/* check for sustain markers != 0 (invalid marker no) */
|
|
if (start_marker && end_marker) {
|
|
/* find start marker */
|
|
loop_start = find_marker(streamFile,MarkerChunkOffset,start_marker);
|
|
loop_end = find_marker(streamFile,MarkerChunkOffset,end_marker);
|
|
|
|
/* find_marker is type uint32_t as the spec says that's the type
|
|
* of the position value, but it returns a -1 on error, and the
|
|
* loop_start and loop_end variables are int32_t, so the error
|
|
* will become apparent.
|
|
* We shouldn't have a loop point that overflows an int32_t
|
|
* anyway. */
|
|
loop_flag = 1;
|
|
if (loop_start==loop_end)
|
|
loop_flag = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* build the VGMSTREAM */
|
|
vgmstream = allocate_vgmstream(channel_count,loop_flag);
|
|
if (!vgmstream) goto fail;
|
|
|
|
vgmstream->sample_rate = sample_rate;
|
|
vgmstream->num_samples = sample_count;
|
|
vgmstream->loop_start_sample = loop_start;
|
|
vgmstream->loop_end_sample = loop_end;
|
|
|
|
vgmstream->coding_type = coding_type;
|
|
if (coding_type == coding_XA) {
|
|
vgmstream->layout_type = layout_blocked_xa_aiff;
|
|
/* AIFF XA can use sample rates other than 37800/18900 */
|
|
/* some Crusader: No Remorse tracks have XA headers with incorrect 0xFF, rip bug/encoder feature? */
|
|
}
|
|
else {
|
|
vgmstream->layout_type = (channel_count > 1) ? layout_interleave : layout_none;
|
|
vgmstream->interleave_block_size = interleave;
|
|
}
|
|
|
|
if (is_aifc)
|
|
vgmstream->meta_type = meta_AIFC;
|
|
else if (is_aiff)
|
|
vgmstream->meta_type = meta_AIFF;
|
|
|
|
|
|
if (!vgmstream_open_stream(vgmstream,streamFile,start_offset))
|
|
goto fail;
|
|
return vgmstream;
|
|
|
|
fail:
|
|
close_vgmstream(vgmstream);
|
|
return NULL;
|
|
}
|