mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-21 10:55:53 +01:00
435 lines
16 KiB
C
435 lines
16 KiB
C
#include "meta.h"
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#include "../layout/layout.h"
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#include "../coding/coding.h"
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/* for reading integers inexplicably packed into 80-bit ('double extended') floats, AKA:
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* "80 bit IEEE Standard 754 floating point number (Standard AppleNumeric Environment [SANE] data type Extended)" */
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static uint32_t read_f80be(off_t offset, STREAMFILE* sf) {
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uint8_t buf[0x0a];
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int32_t exponent;
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int32_t mantissa;
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int i;
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if (read_streamfile(buf, offset, sizeof(buf), sf) != sizeof(buf))
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return 0;
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exponent = ((buf[0]<<8) | (buf[1])) & 0x7fff;
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exponent -= 16383;
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mantissa = 0;
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for (i = 0; i < 8; i++) {
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int32_t shift = exponent-7-i*8;
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if (shift >= 0)
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mantissa |= buf[i+2] << shift;
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else if (shift > -8)
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mantissa |= buf[i+2] >> -shift;
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}
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return mantissa * ((buf[0]&0x80) ? -1 : 1);
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}
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static uint32_t find_marker(STREAMFILE* sf, off_t mark_offset, int marker_id) {
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uint16_t marker_count;
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off_t marker_offset;
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int i;
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marker_count = read_u16be(mark_offset + 0x00,sf);
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marker_offset = mark_offset + 0x02;
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for (i = 0; i < marker_count; i++) {
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int name_length;
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if (read_u16be(marker_offset + 0x00, sf) == marker_id)
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return read_u32be(marker_offset + 0x02,sf);
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name_length = read_u8(marker_offset + 0x06,sf) + 1;
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if (name_length % 2) name_length++;
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marker_offset += 0x06 + name_length;
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}
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return -1;
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}
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static int is_str(const char* str, int len, off_t offset, STREAMFILE* sf) {
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uint8_t buf[0x100];
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if (len == 0)
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len = strlen(str);
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if (len > sizeof(buf))
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return 0;
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if (read_streamfile(buf, offset, len, sf) != len)
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return 0;
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return memcmp(buf, str, len) == 0; /* memcmp to allow "AB\0\0" */
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}
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/* AIFF/AIFF-C (Audio Interchange File Format - Compressed) - Apple format, from Mac/3DO/other games */
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VGMSTREAM* init_vgmstream_aifc(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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off_t start_offset = 0, coef_offset = 0;
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uint32_t aifx_size, file_size;
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coding_t coding_type = 0;
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int channels = 0, sample_count = 0, sample_size = 0, sample_rate = 0;
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int interleave = 0;
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int loop_flag = 0;
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int32_t loop_start = 0, loop_end = 0;
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int is_aiff_ext = 0, is_aifc_ext = 0, is_aiff = 0, is_aifc = 0;
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int fver_found = 0, comm_found = 0, data_found = 0;
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off_t mark_offset = 0, inst_offset = 0;
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/* checks */
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if (!is_id32be(0x00,sf, "FORM"))
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goto fail;
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/* .aif: common (AIFF or AIFC), .aiff: common AIFF, .aifc: common AIFC
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* .laif/laiff/laifc: for plugins
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* .cbd2: M2 games
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* .bgm: Super Street Fighter II Turbo (3DO)
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* .acm: Crusader - No Remorse (SAT)
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* .adp: Sonic Jam (SAT)
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* .ai: Dragon Force (SAT)
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* (extensionless: Doom (3DO)
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* .fda: Homeworld 2 (PC)
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* .n64: Turok (N64) src
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* .pcm: Road Rash (SAT)
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* .wav: SimCity 3000 (Mac)
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* .lwav: for media players that may confuse this format with the usual RIFF WAVE file.
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* .xa: SimCity 3000 (Mac)
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*/
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if (check_extensions(sf, "aif,laif,")) {
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is_aifc_ext = 1;
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is_aiff_ext = 1;
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}
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else if (check_extensions(sf, "aifc,laifc,afc,cbd2,bgm,fda,n64,wav,lwav,xa")) {
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is_aifc_ext = 1;
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}
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else if (check_extensions(sf, "aiff,laiff,acm,adp,ai,pcm,wav")) {
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is_aiff_ext = 1;
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}
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else {
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goto fail;
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}
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file_size = get_streamfile_size(sf);
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aifx_size = read_u32be(0x04,sf);
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/* AIFF originally allowed only PCM (non-compressed) audio, so newer AIFC was added,
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* though some AIFF with other codecs exist */
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if (is_id32be(0x08,sf, "AIFC")) {
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if (!is_aifc_ext) goto fail;
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is_aifc = 1;
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}
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else if (is_id32be(0x08,sf, "AIFF")) {
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if (!is_aiff_ext) goto fail;
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is_aiff = 1;
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}
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else {
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goto fail;
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}
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/* some games have wonky sizes, selectively fix to catch bad rips and new mutations */
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if (file_size != aifx_size + 0x08) {
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if (is_aiff && file_size == aifx_size + 0x08 + 0x08)
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aifx_size += 0x08; /* [Psychic Force Puzzle Taisen CD2 (PS1)] */
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}
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if (aifx_size + 0x08 != file_size)
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goto fail;
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/* read through chunks to verify format and find metadata */
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{
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off_t offset = 0x0c; /* start with first chunk within FORM */
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while (offset < file_size) {
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uint32_t chunk_type = read_u32be(offset + 0x00,sf);
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uint32_t chunk_size = read_u32be(offset + 0x04,sf);
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/* chunks must be padded to an even number of bytes but chunk
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* size does not include that padding */
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if (chunk_size % 2)
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chunk_size++;
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offset += 0x08;
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if (offset + chunk_size > file_size)
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goto fail;
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switch(chunk_type) {
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case 0x46564552: /* "FVER" (version info, required) */
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if (fver_found) goto fail;
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if (is_aiff) goto fail; /* plain AIFF shouldn't have */
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fver_found = 1;
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if (chunk_size != 4)
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goto fail;
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/* Version 1 of AIFF-C spec timestamp */
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if (read_u32be(offset + 0x00,sf) != 0xA2805140)
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goto fail;
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break;
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case 0x434F4D4D: /* "COMM" (main header) */
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if (comm_found) goto fail;
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comm_found = 1;
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channels = read_u16be(offset + 0x00,sf);
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sample_count = read_u32be(offset + 0x02,sf); /* sample_frames in theory, depends on codec */
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sample_size = read_u16be(offset + 0x06,sf);
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sample_rate = read_f80be(offset + 0x08,sf);
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if (is_aifc) {
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uint32_t codec = read_u32be(offset + 0x12,sf);
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/* followed by "pascal string": name size + human-readable name (full count padded to even size) */
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switch (codec) {
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case 0x53445832: /* "SDX2" [3DO games: Super Street Fighter II Turbo (3DO), etc] */
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/* "2:1 Squareroot-Delta-Exact compression" */
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coding_type = coding_SDX2;
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interleave = 0x01;
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break;
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case 0x43424432: /* "CBD2" [M2 (arcade 3DO) games: IMSA Racing (M2), etc] */
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/* "2:1 Cuberoot-Delta-Exact compression" */
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coding_type = coding_CBD2;
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interleave = 0x01;
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break;
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case 0x41445034: /* "ADP4" */
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coding_type = coding_DVI_IMA_int;
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if (channels != 1) break; /* don't know how stereo DVI is laid out */
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break;
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case 0x696D6134: /* "ima4" [Alida (PC), Lunar SSS (iOS)] */
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/* "IMA 4:1FLLR" */
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coding_type = coding_APPLE_IMA4;
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interleave = 0x22;
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sample_count = sample_count * ((interleave-0x2)*2);
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break;
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case 0x434F4D50: { /* "COMP" (generic compression) */
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uint8_t name_size = read_u8(offset + 0x16, sf);
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if (is_str("Relic Codec v1.6", name_size, offset + 0x17, sf)) {
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coding_type = coding_RELIC;
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sample_count = sample_count * 512;
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}
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else {
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goto fail;
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}
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break;
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}
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case 0x56415043: { /* "VAPC" [N64 (SDK mainly but apparently may exist in ROMs)] */
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/* "VADPCM ~4-1" */
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coding_type = coding_VADPCM;
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/* N64 tools don't create FVER, but it's required by the spec (could skip the check though) */
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fver_found = 1;
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break;
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}
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default:
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VGM_LOG("AIFC: unknown codec\n");
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goto fail;
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}
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}
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else if (is_aiff) {
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switch (sample_size) {
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case 8:
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coding_type = coding_PCM8;
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interleave = 1;
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break;
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case 16:
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coding_type = coding_PCM16BE;
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interleave = 2;
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break;
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case 4: /* Crusader: No Remorse (SAT), Road Rash (3DO/SAT) */
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coding_type = coding_XA;
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break;
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default:
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VGM_LOG("AIFF: unknown codec\n");
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goto fail;
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}
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}
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break;
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case 0x53534E44: /* "SSND" (main data) */
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case 0x4150434D: /* "APCM" (main data for XA) */
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if (data_found) goto fail;
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data_found = 1;
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/* 00: offset (for aligment, usually 0)
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* 04: block size (ex. XA: 0x914) */
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start_offset = offset + 0x08 + read_u32be(offset + 0x00,sf);
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break;
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case 0x4D41524B: /* "MARK" (loops) */
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mark_offset = offset;
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break;
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case 0x494E5354: /* "INST" (loops) */
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inst_offset = offset;
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break;
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case 0x4150504C: /* "APPL" (application specific) */
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if (is_str("stoc", 0, offset + 0x00, sf)) {
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uint8_t name_size = read_u8(offset + 0x4, sf);
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off_t next_offset = offset + 0x04 + align_size_to_block(0x1 + name_size, 0x02);
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/* chunks appears multiple times per substring */
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if (is_str("VADPCMCODES", name_size, offset + 0x05, sf)) {
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coef_offset = next_offset;
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}
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else if (is_str("VADPCMLOOPS", name_size, offset + 0x05, sf)) {
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/* goes with inst (spec says app chunks have less priority than inst+mark loops) */
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int version = read_u16be(next_offset + 0x00, sf);
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int loops = read_u16be(next_offset + 0x02, sf);
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if (version != 1 || loops != 1) goto fail;
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loop_start = read_u32be(next_offset + 0x04, sf);
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loop_end = read_u32be(next_offset + 0x08, sf);
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loop_flag = read_s32be(next_offset + 0x08, sf) != 0; /*-1 = infinite */
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/* 0x10: ADPCM state[16] (hists?) */
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}
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else {
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VGM_LOG("AIFC: unknown APPL chunk\n");
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goto fail;
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}
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}
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break;
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default:
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break;
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}
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offset += chunk_size;
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}
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}
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if (is_aifc) {
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if (!fver_found || !comm_found || !data_found)
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goto fail;
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} else if (is_aiff) {
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if (!comm_found || !data_found)
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goto fail;
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}
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/* read loop points */
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if (inst_offset && mark_offset) {
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int start_marker;
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int end_marker;
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/* use the 'sustain loop', if playMode=ForwardLooping */
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if (read_u16be(inst_offset + 0x08,sf) == 1) {
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start_marker = read_u16be(inst_offset + 0x0a,sf);
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end_marker = read_u16be(inst_offset + 0x0c,sf);
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/* check for sustain markers != 0 (invalid marker no) */
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if (start_marker && end_marker) {
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/* find start marker */
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loop_start = find_marker(sf, mark_offset, start_marker);
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loop_end = find_marker(sf, mark_offset, end_marker);
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/* find_marker is type uint32_t as the spec says that's the type
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* of the position value, but it returns a -1 on error, and the
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* loop_start and loop_end variables are int32_t, so the error
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* will become apparent.
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* We shouldn't have a loop point that overflows an int32_t anyway. */
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loop_flag = 1;
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if (loop_start == loop_end)
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loop_flag = 0;
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}
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}
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}
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if (!loop_flag && mark_offset) {
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int mark_count = read_u16be(mark_offset + 0x00,sf);
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/* use "beg/end" loop comments [Battle Tryst (Arcade)]
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* Relic codec has 3 "beg loop" "end loop" "start offset" comments, but always begin = 0 and end = -1 */
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if (mark_count == 2) {
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/* per mark:
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* 00(2): id
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* 02(4): sample point
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* 06(1): string size
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* --(-): string (non-null terminated)
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* --(1): null terminator */
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/* simplified... */
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if (read_u32be(mark_offset + 0x09,sf) == 0x62656720 && /* "beg " */
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read_u32be(mark_offset + 0x19,sf) == 0x656E6420) { /* "end " */
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loop_start = read_s32be(mark_offset + 0x04, sf);
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loop_end = read_s32be(mark_offset + 0x14, sf);
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loop_flag = 1;
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}
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}
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}
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/* build the VGMSTREAM */
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vgmstream = allocate_vgmstream(channels, loop_flag);
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if (!vgmstream) goto fail;
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vgmstream->sample_rate = sample_rate;
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vgmstream->num_samples = sample_count;
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vgmstream->loop_start_sample = loop_start;
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vgmstream->loop_end_sample = loop_end;
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vgmstream->coding_type = coding_type;
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switch(coding_type) {
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case coding_XA:
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vgmstream->layout_type = layout_blocked_xa_aiff;
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/* AIFF XA can use sample rates other than 37800/18900 */
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/* some Crusader: No Remorse tracks have XA headers with incorrect 0xFF, rip bug/encoder feature? */
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break;
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case coding_RELIC: {
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int bitrate = read_u16be(start_offset, sf);
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start_offset += 0x02;
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vgmstream->codec_data = init_relic(channels, bitrate, sample_rate);
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if (!vgmstream->codec_data) goto fail;
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vgmstream->layout_type = layout_none;
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vgmstream->sample_rate = 44100; /* fixed output */
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break;
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}
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case coding_VADPCM:
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if (channels > 1) goto fail; /* unknown layout */
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if (coef_offset == 0) goto fail;
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vgmstream->layout_type = layout_none;
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{
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int version = read_u16be(coef_offset + 0x00, sf);
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int order = read_u16be(coef_offset + 0x02, sf);
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int entries = read_u16be(coef_offset + 0x04, sf);
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if (version != 1) goto fail;
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vadpcm_read_coefs_be(vgmstream, sf, coef_offset + 0x06, order, entries, 0);
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}
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//vgmstream->num_samples = vadpcm_bytes_to_samples(data_size, channels); /* unneeded */
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break;
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default:
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vgmstream->layout_type = (channels > 1) ? layout_interleave : layout_none;
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vgmstream->interleave_block_size = interleave;
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break;
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}
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if (is_aifc)
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vgmstream->meta_type = meta_AIFC;
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else if (is_aiff)
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vgmstream->meta_type = meta_AIFF;
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if (!vgmstream_open_stream(vgmstream, sf, start_offset))
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goto fail;
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return vgmstream;
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fail:
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close_vgmstream(vgmstream);
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return NULL;
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}
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