#include "meta.h" #include "../layout/layout.h" #include "../util.h" /* Sony PSX CD-XA */ /* No looped file ! */ off_t init_xa_channel(int *channel,STREAMFILE *streamFile); uint8_t AUDIO_CODING_GET_STEREO(uint8_t value) { return (uint8_t)(value & 3); } uint8_t AUDIO_CODING_GET_FREQ(uint8_t value) { return (uint8_t)((value >> 2) & 3); } VGMSTREAM * init_vgmstream_cdxa(STREAMFILE *streamFile) { VGMSTREAM * vgmstream = NULL; char filename[PATH_LIMIT]; int channel_count; int headerless=0; int xa_channel=0; uint8_t bCoding; off_t start_offset; int i; /* check extension, case insensitive */ streamFile->get_name(streamFile,filename,sizeof(filename)); if (strcasecmp("xa",filename_extension(filename))) goto fail; /* check RIFF Header */ if (!((read_32bitBE(0x00,streamFile) == 0x52494646) && (read_32bitBE(0x08,streamFile) == 0x43445841) && (read_32bitBE(0x0C,streamFile) == 0x666D7420))) headerless=1; /* First init to have the correct info of the channel */ if (!headerless) { start_offset=init_xa_channel(&xa_channel,streamFile); /* No sound ? */ if(start_offset==0) goto fail; bCoding = read_8bit(start_offset-5,streamFile); switch (AUDIO_CODING_GET_STEREO(bCoding)) { case 0: channel_count = 1; break; case 1: channel_count = 2; break; default: channel_count = 0; break; } /* build the VGMSTREAM */ vgmstream = allocate_vgmstream(channel_count,0); if (!vgmstream) goto fail; /* fill in the vital statistics */ vgmstream->channels = channel_count; vgmstream->xa_channel = xa_channel; switch (AUDIO_CODING_GET_FREQ(bCoding)) { case 0: vgmstream->sample_rate = 37800; break; case 1: vgmstream->sample_rate = 18900; break; default: vgmstream->sample_rate = 0; break; } /* Check for Compression Scheme */ vgmstream->num_samples = (int32_t)((((get_streamfile_size(streamFile) - 0x3C)/2352)*0x1F80)/(2*channel_count)); } else { channel_count=2; vgmstream = allocate_vgmstream(2,0); if (!vgmstream) goto fail; vgmstream->xa_headerless=1; vgmstream->sample_rate=44100; vgmstream->channels=2; vgmstream->num_samples = (int32_t)(((get_streamfile_size(streamFile)/ 0x80)*0xE0)/2); start_offset=0; } vgmstream->coding_type = coding_XA; vgmstream->layout_type = layout_xa_blocked; vgmstream->meta_type = meta_PSX_XA; /* open the file for reading by each channel */ { STREAMFILE *chstreamfile; chstreamfile = streamFile->open(streamFile,filename,2352); if (!chstreamfile) goto fail; for (i=0;ich[i].streamfile = chstreamfile; } } xa_block_update(start_offset,vgmstream); return vgmstream; /* clean up anything we may have opened */ fail: if (vgmstream) close_vgmstream(vgmstream); return NULL; } off_t init_xa_channel(int* channel,STREAMFILE* streamFile) { off_t block_offset=0x44; size_t filelength=get_streamfile_size(streamFile); int8_t currentChannel; // 0 can't be a correct value if(block_offset>=(off_t)filelength) return 0; currentChannel=read_8bit(block_offset-7,streamFile); //subAudio=read_8bit(block_offset-6,streamFile); *channel=currentChannel; //if (!((currentChannel==channel) && (subAudio==0x64))) { // block_offset+=2352; // goto begin; //} return block_offset; }