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Fix some .agsc [Metroid Prime (GC)]
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bnnm
parent
9631e02689
commit
f6b2c6fab3
195
src/meta/agsc.c
195
src/meta/agsc.c
@ -1,74 +1,145 @@
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#include "meta.h"
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#include "../util.h"
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#include "../coding/coding.h"
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#include "../util/reader_text.h"
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#include "../util/meta_utils.h"
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/* .agsc - from Metroid Prime 2 */
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static bool parse_agsc(meta_header_t* hdr, STREAMFILE* sf, int version);
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VGMSTREAM * init_vgmstream_agsc(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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char filename[PATH_LIMIT];
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off_t header_offset;
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off_t start_offset;
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int channel_count;
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int i;
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/* .agsc - from Retro Studios games [Metroid Prime (GC), Metroid Prime 2 (GC)] */
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VGMSTREAM* init_vgmstream_agsc(STREAMFILE* sf) {
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/* check extension, case insensitive */
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streamFile->get_name(streamFile,filename,sizeof(filename));
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if (strcasecmp("agsc",filename_extension(filename))) goto fail;
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/* checks */
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int version;
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if (is_id32be(0x00, sf, "Audi"))
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version = 1;
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else if (read_u32be(0x00, sf) == 0x00000001)
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version = 2;
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else
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return NULL;
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/* check header */
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if ((uint32_t)read_32bitBE(0,streamFile)!=0x00000001)
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goto fail;
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/* .agsc: 'class' type in .pak */
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if (!check_extensions(sf, "agsc"))
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return NULL;
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/* count length of name, including terminating 0 */
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for (header_offset=4;header_offset < get_streamfile_size(streamFile) && read_8bit(header_offset,streamFile)!='\0';header_offset++);
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header_offset ++;
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meta_header_t hdr = {0};
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if (!parse_agsc(&hdr, sf, version))
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return NULL;
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channel_count = 1;
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hdr.meta = meta_AGSC;
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hdr.coding = coding_NGC_DSP;
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hdr.layout = layout_none;
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hdr.big_endian = true;
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hdr.allow_dual_stereo = true;
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/* build the VGMSTREAM */
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hdr.sf = sf;
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hdr.open_stream = true;
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vgmstream = allocate_vgmstream(1,1);
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if (!vgmstream) goto fail;
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/* fill in the vital statistics */
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vgmstream->num_samples = read_32bitBE(header_offset+0xda,streamFile);
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vgmstream->sample_rate = (uint16_t)read_16bitBE(header_offset+0xd8,streamFile);
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vgmstream->loop_start_sample = read_32bitBE(header_offset+0xde,streamFile);
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/* this is cute, we actually have a "loop length" */
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vgmstream->loop_end_sample = (vgmstream->loop_start_sample + read_32bitBE(header_offset+0xe2,streamFile))-1;
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vgmstream->coding_type = coding_NGC_DSP;
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vgmstream->layout_type = layout_none;
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vgmstream->meta_type = meta_AGSC;
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vgmstream->allow_dual_stereo = 1;
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for (i=0;i<16;i++) {
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vgmstream->ch[0].adpcm_coef[i]=read_16bitBE(header_offset+0xf6+i*2,streamFile);
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}
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start_offset = header_offset+0x116;
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/* open the file for reading by each channel */
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{
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int i;
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for (i=0;i<channel_count;i++) {
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vgmstream->ch[i].streamfile = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
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if (!vgmstream->ch[i].streamfile) goto fail;
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vgmstream->ch[i].channel_start_offset=
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vgmstream->ch[i].offset=
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start_offset;
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}
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}
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return vgmstream;
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/* clean up anything we may have opened */
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fail:
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if (vgmstream) close_vgmstream(vgmstream);
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return NULL;
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return alloc_metastream(&hdr);
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}
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static bool parse_agsc(meta_header_t* hdr, STREAMFILE* sf, int version) {
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uint32_t offset;
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int name_size;
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switch(version) {
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case 1:
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// usually "Audio/" but rarely "Audio//"
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name_size = read_string(NULL, 0x20, 0x00, sf);
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if (name_size == 0) // not a string
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return false;
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offset = name_size + 1;
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break;
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case 2:
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/* after fixed ID */
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offset = 0x04;
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break;
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default:
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return false;
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}
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/* after id starts with name + null */
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hdr->name_offset = offset;
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name_size = read_string(NULL, 0x20, offset, sf);
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if (name_size == 0) // not a string
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return false;
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offset += name_size + 1;
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uint32_t head_offset, data_offset;
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uint32_t unk1_size, unk2_size, head_size, data_size;
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switch(version) {
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case 1:
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/* per chunk: chunk size + chunk data */
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unk1_size = read_u32be(offset, sf);
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offset += 0x04 + unk1_size;
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unk2_size = read_u32be(offset, sf);
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offset += 0x04 + unk2_size;
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data_offset = offset + 0x04; // data chunk goes before headers...
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data_size = read_u32be(offset, sf);
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offset += 0x04 + data_size;
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head_offset = offset + 0x04;
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head_size = read_u32be(offset, sf);
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offset += 0x04 + head_size;
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break;
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case 2:
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/* chunk sizes per chunk + chunk data per chunk */
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offset += 0x02; // song id?
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unk1_size = read_u32be(offset + 0x00, sf);
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unk2_size = read_u32be(offset + 0x04, sf);
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head_size = read_u32be(offset + 0x08, sf);
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data_size = read_u32be(offset + 0x0c, sf);
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head_offset = offset + 0x10 + unk1_size + unk2_size;
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data_offset = head_offset + head_size;
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break;
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default:
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return false;
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}
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// offsets/values/data aren't 32b aligned but file is (0xFF padding)
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// possible in some test banks
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if (data_size == 0 || head_size < 0x20 + 0x28) {
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vgm_logi("AGSC: bank has no subsongs (ignore)\n");
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return false;
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}
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/* header chunk has 0x20 headers per subsong + 0xFFFFFFFF (end marker) + 0x28 coefs per subsongs,
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* no apparent count even in other chunks */
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hdr->total_subsongs = (head_size - 0x04) / (0x20 + 0x28);
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hdr->target_subsong = sf->stream_index;
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if (!check_subsongs(&hdr->target_subsong, hdr->total_subsongs))
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return false;
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uint32_t entry_offset = head_offset + 0x20 * (hdr->target_subsong - 1);
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// 00: id?
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hdr->stream_offset = read_u32be(entry_offset + 0x04,sf) + data_offset;
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// 08: null?
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// 0c: always 0x3c00?
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hdr->sample_rate = read_u16be(entry_offset + 0x0e,sf);
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hdr->num_samples = read_s32be(entry_offset + 0x10,sf);
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hdr->loop_start = read_s32be(entry_offset + 0x14,sf);
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hdr->loop_end = read_s32be(entry_offset + 0x18,sf); // loop length
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hdr->coefs_offset = read_s32be(entry_offset + 0x1c,sf);
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if (hdr->loop_end)
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hdr->loop_end = hdr->loop_end + hdr->loop_start - 1;
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hdr->loop_flag = hdr->loop_end != 0;
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hdr->coefs_offset += head_offset + 0x08; // skip unknown hist/loop ps-like values
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hdr->channels = 1; // MP2 uses dual stereo for title track
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hdr->stream_size = hdr->num_samples / 14 * 8 * hdr->channels; // meh
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return true;
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}
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@ -1,5 +1,6 @@
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#include "../vgmstream.h"
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#include "meta_utils.h"
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#include "reader_text.h"
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/* Allocate memory and setup a VGMSTREAM */
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@ -10,7 +11,7 @@ VGMSTREAM* alloc_metastream(meta_header_t* h) {
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return NULL;
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}
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if (h->num_samples <= 0 || h->num_samples > VGMSTREAM_MAX_NUM_SAMPLES) {
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VGM_LOG("meta: wrong samples %i\n", h->sample_rate);
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VGM_LOG("meta: wrong samples %i\n", h->num_samples);
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return NULL;
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}
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@ -30,7 +31,10 @@ VGMSTREAM* alloc_metastream(meta_header_t* h) {
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vgmstream->num_streams = h->total_subsongs;
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vgmstream->stream_size = h->stream_size;
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vgmstream->interleave_block_size = h->interleave;
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vgmstream->allow_dual_stereo = h->allow_dual_stereo;
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if (h->name_offset)
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read_string(vgmstream->stream_name, sizeof(vgmstream->stream_name), h->name_offset, h->sf ? h->sf : h->sf_head);
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if (h->coding == coding_NGC_DSP && (h->sf || h->sf_head)) {
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if (h->coefs_offset || h->coefs_spacing)
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@ -39,7 +39,9 @@ typedef struct {
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uint32_t hists_offset;
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uint32_t hists_spacing;
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/* optional but can be used for some actions */
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uint32_t name_offset;
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/* optional but can be used for some actions (such as DSP coefs) */
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bool big_endian;
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coding_t coding;
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layout_t layout;
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@ -51,6 +53,8 @@ typedef struct {
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STREAMFILE* sf_body;
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bool open_stream;
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bool allow_dual_stereo;
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} meta_header_t;
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VGMSTREAM* alloc_metastream(meta_header_t* h);
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