#include "meta.h" #include "../util.h" VGMSTREAM * init_vgmstream_brstm(STREAMFILE *streamFile) { VGMSTREAM * vgmstream = NULL; char filename[260]; coding_t coding_type; off_t head_offset; size_t head_length; int codec_number; int channel_count; int loop_flag; /* Certain Super Paper Mario tracks have a 44.1KHz sample rate in the * header, but they should be played at 22.05KHz. We will make this * correction if we see a file with a .brstmspm extension. */ int spm_flag = 0; off_t start_offset; /* check extension, case insensitive */ streamFile->get_name(streamFile,filename,sizeof(filename)); if (strcasecmp("brstm",filename_extension(filename))) { if (strcasecmp("brstmspm",filename_extension(filename))) goto fail; else spm_flag = 1; } /* check header */ if ((uint32_t)read_32bitBE(0,streamFile)!=0x5253544D || /* "RSTM" */ (uint32_t)read_32bitBE(4,streamFile)!=0xFEFF0100) goto fail; /* get head offset, check */ head_offset = read_32bitBE(0x10,streamFile); if ((uint32_t)read_32bitBE(head_offset,streamFile)!=0x48454144) /* "HEAD" */ goto fail; head_length = read_32bitBE(0x14,streamFile); /* check type details */ codec_number = read_8bit(head_offset+0x20,streamFile); loop_flag = read_8bit(head_offset+0x21,streamFile); channel_count = read_8bit(head_offset+0x22,streamFile); switch (codec_number) { case 0: coding_type = coding_PCM8; break; case 1: coding_type = coding_PCM16BE; break; case 2: coding_type = coding_NGC_DSP; break; default: goto fail; } if (channel_count < 1) goto fail; /* build the VGMSTREAM */ vgmstream = allocate_vgmstream(channel_count,loop_flag); if (!vgmstream) goto fail; /* fill in the vital statistics */ vgmstream->num_samples = read_32bitBE(head_offset+0x2c,streamFile); vgmstream->sample_rate = (uint16_t)read_16bitBE(head_offset+0x24,streamFile); /* channels and loop flag are set by allocate_vgmstream */ vgmstream->loop_start_sample = read_32bitBE(head_offset+0x28,streamFile); vgmstream->loop_end_sample = vgmstream->num_samples; vgmstream->coding_type = coding_type; if (channel_count==1) vgmstream->layout_type = layout_none; else vgmstream->layout_type = layout_interleave_shortblock; vgmstream->meta_type = meta_RSTM; if (spm_flag&& vgmstream->sample_rate == 44100) { vgmstream->meta_type = meta_RSTM_SPM; vgmstream->sample_rate = 22050; } vgmstream->interleave_block_size = read_32bitBE(head_offset+0x38,streamFile); vgmstream->interleave_smallblock_size = read_32bitBE(head_offset+0x48,streamFile); if (vgmstream->coding_type == coding_NGC_DSP) { off_t coef_offset; off_t coef_offset1; off_t coef_offset2; int i,j; coef_offset1=read_32bitBE(head_offset+0x1c,streamFile); coef_offset2=read_32bitBE(head_offset+0x10+coef_offset1,streamFile); coef_offset=coef_offset2+0x10; for (j=0;jchannels;j++) { for (i=0;i<16;i++) { vgmstream->ch[j].adpcm_coef[i]=read_16bitBE(head_offset+coef_offset+j*0x38+i*2,streamFile); } } } start_offset = read_32bitBE(head_offset+0x30,streamFile); /* open the file for reading by each channel */ { int i; for (i=0;ilayout_type==layout_interleave_shortblock) vgmstream->ch[i].streamfile = streamFile->open(streamFile,filename, vgmstream->interleave_block_size); else vgmstream->ch[i].streamfile = streamFile->open(streamFile,filename, 0x1000); if (!vgmstream->ch[i].streamfile) goto fail; vgmstream->ch[i].channel_start_offset= vgmstream->ch[i].offset= start_offset + i*vgmstream->interleave_block_size; } } return vgmstream; /* clean up anything we may have opened */ fail: if (vgmstream) close_vgmstream(vgmstream); return NULL; }