mirror of
https://github.com/vgmstream/vgmstream.git
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cf92497382
git-svn-id: https://vgmstream.svn.sourceforge.net/svnroot/vgmstream@690 51a99a44-fe44-0410-b1ba-c3e57ba2b86b
154 lines
5.3 KiB
C
154 lines
5.3 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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#include "../util.h"
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/* BNS - Wii "Banner Sound" disc jingle */
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VGMSTREAM * init_vgmstream_wii_bns(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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char filename[260];
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off_t BNS_offset;
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uint32_t info_offset=0,data_offset=0;
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uint32_t channel_info_offset_list_offset;
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int channel_count;
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int loop_flag;
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uint16_t sample_rate;
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uint32_t sample_count, loop_start;
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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("bns",filename_extension(filename))) goto fail;
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// check header
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BNS_offset = 0;
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if (read_32bitBE(BNS_offset,streamFile) == 0x494D4435) // IMD5
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{
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// Skip IMD5 header if present
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BNS_offset = 0x20;
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}
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if (read_32bitBE(BNS_offset+0x00,streamFile) != 0x424E5320) goto fail; // "BNS "
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if ((uint32_t)read_32bitBE(BNS_offset+0x04,streamFile) != 0xFEFF0100u) goto fail;
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// find chunks, verify
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{
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// file size as claimed by header
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uint32_t header_file_size = read_32bitBE(BNS_offset+0x08,streamFile);
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uint32_t header_size = read_16bitBE(BNS_offset+0xc,streamFile);
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uint16_t chunk_count = read_16bitBE(BNS_offset+0xe,streamFile);
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int i;
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// assume BNS is the last thing in the file
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if (header_file_size + BNS_offset != get_streamfile_size(streamFile))
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goto fail;
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for (i = 0; i < chunk_count; i++) {
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uint32_t chunk_info_offset = BNS_offset+0x10+i*8;
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uint32_t chunk_offset, chunk_size;
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// ensure chunk info is within header
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if (chunk_info_offset+8 > BNS_offset+header_size) goto fail;
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chunk_offset = BNS_offset + (uint32_t)read_32bitBE(chunk_info_offset,streamFile);
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chunk_size = (uint32_t)read_32bitBE(chunk_info_offset+4,streamFile);
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// ensure chunk is within file
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if (chunk_offset < BNS_offset+header_size ||
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chunk_offset+chunk_size > BNS_offset+header_file_size) goto fail;
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// ensure chunk size in header matches that listed in chunk
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// Note: disabled for now, as the Homebrew Channel BNS has a DATA
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// chunk that doesn't include the header size
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//if ((uint32_t)read_32bitBE(chunk_offset+4,streamFile) != chunk_size) goto fail;
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// handle each chunk type
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switch (read_32bitBE(chunk_offset,streamFile)) {
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case 0x494E464F: // INFO
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info_offset = chunk_offset+8;
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break;
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case 0x44415441: // DATA
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data_offset = chunk_offset+8;
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break;
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default:
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goto fail;
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}
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}
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/* need both INFO and DATA */
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if (!info_offset || !data_offset) goto fail;
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}
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/* parse out basic stuff in INFO */
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{
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/* only seen this zero, specifies DSP format? */
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if (read_8bit(info_offset+0x00,streamFile) != 0) goto fail;
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loop_flag = read_8bit(info_offset+0x01,streamFile);
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channel_count = read_8bit(info_offset+0x02,streamFile);
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/* only seen zero, padding? */
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if (read_8bit(info_offset+0x03,streamFile) != 0) goto fail;
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sample_rate = (uint16_t)read_16bitBE(info_offset+0x04,streamFile);
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/* only seen this zero, padding? */
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if (read_16bitBE(info_offset+0x06,streamFile) != 0) goto fail;
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loop_start = read_32bitBE(info_offset+0x08,streamFile);
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sample_count = read_32bitBE(info_offset+0x0c,streamFile);
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channel_info_offset_list_offset = info_offset + (uint32_t)read_32bitBE(info_offset+0x10,streamFile);
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}
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/* build the VGMSTREAM */
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vgmstream = allocate_vgmstream(channel_count,loop_flag);
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if (!vgmstream) goto fail;
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/* fill in the vital statistics */
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vgmstream->channels = channel_count;
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vgmstream->sample_rate = sample_rate;
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vgmstream->coding_type = coding_NGC_DSP;
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vgmstream->num_samples = sample_count;
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vgmstream->layout_type = layout_none;
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vgmstream->meta_type = meta_WII_BNS;
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if (loop_flag)
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{
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vgmstream->loop_start_sample = loop_start;
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vgmstream->loop_end_sample = sample_count;
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}
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/* open the file for reading */
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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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uint32_t channel_info_offset = info_offset + read_32bitBE(channel_info_offset_list_offset+4*i,streamFile);
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uint32_t channel_data_offset = data_offset + (uint32_t)read_32bitBE(channel_info_offset+0,streamFile);
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uint32_t channel_dsp_offset = info_offset + (uint32_t)read_32bitBE(channel_info_offset+4,streamFile);
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int j;
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/* always been 0... */
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if (read_32bitBE(channel_info_offset+8,streamFile) != 0) goto fail;
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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=channel_data_offset;
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for (j=0;j<16;j++)
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vgmstream->ch[i].adpcm_coef[j] =
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read_16bitBE(channel_dsp_offset+j*2,streamFile);
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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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}
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