VGMSTREAM * init_vgmstream_eacs(STREAMFILE *streamFile) {
VGMSTREAM * vgmstream = NULL;
char filename[260];
int channel_count;
int loop_flag=0;
char little_endian=0;
off_t start_offset;
EACSHeader *ea_header = NULL;
int32_t samples_count=0;
int i;
/* check extension, case insensitive */
streamFile->get_name(streamFile,filename,sizeof(filename));
if (strcasecmp("cnk",filename_extension(filename)) &&
strcasecmp("as4",filename_extension(filename)) &&
strcasecmp("asf",filename_extension(filename))) goto fail;
ea_header=(EACSHeader *)malloc(sizeof(EACSHeader));
/* check header */
if ((uint32_t)read_32bitBE(0,streamFile)!=0x31534E68) /* "1SNh" */
goto fail;
/* check if we are little or big endian */
if ((uint32_t)read_32bitBE(4,streamFile)<0x40)
little_endian=1;
/* check type details */
start_offset = read_32bitLE(0x04,streamFile);
if((uint32_t)read_32bitBE(0x08,streamFile)==0x45414353) { /* EACS */
read_streamfile((uint8_t*)ea_header,0x08,sizeof(EACSHeader),streamFile);
loop_flag = 0; //(ea_header->dwLoopStart!=0);
channel_count = (ea_header->bChannels);
/* build the VGMSTREAM */
vgmstream = allocate_vgmstream(channel_count,0);
if (!vgmstream) goto fail;
/* fill in the vital statistics */
init_get_high_nibble(vgmstream);
vgmstream->sample_rate = ea_header->dwSampleRate;
if(ea_header->bCompression==0) {
vgmstream->coding_type = coding_PCM16LE_int;
if(ea_header->bBits==1)
vgmstream->coding_type = coding_PCM8_int;
}
else
vgmstream->coding_type = coding_EACS_IMA;
vgmstream->layout_type = layout_eacs_blocked;
vgmstream->meta_type = meta_EACS_PC;
if(little_endian)
vgmstream->meta_type = meta_EACS_SAT;
} else {
channel_count=read_32bitLE(0x20,streamFile);
vgmstream = allocate_vgmstream(channel_count,0);
if (!vgmstream) goto fail;
vgmstream->sample_rate = read_32bitLE(0x08,streamFile);
vgmstream->coding_type = coding_PSX;
vgmstream->layout_type=layout_eacs_blocked;
vgmstream->meta_type=meta_EACS_PSX;
}
vgmstream->ea_platform=little_endian;
/* open the file for reading by each channel */
{
for (i=0;i<channel_count;i++) {
vgmstream->ch[i].streamfile = streamFile->open(streamFile,filename,0x8000);
if (!vgmstream->ch[i].streamfile) goto fail;
}
}
// calc the samples length ...
if(little_endian)
vgmstream->next_block_offset=read_32bitBE(0x04,streamFile);
else
vgmstream->next_block_offset=read_32bitLE(0x04,streamFile);
if(vgmstream->next_block_offset>0x30) {
vgmstream->current_block_size=vgmstream->next_block_offset-sizeof(EACSHeader);
samples_count=(int32_t)vgmstream->current_block_size/get_vgmstream_frame_size(vgmstream)*get_vgmstream_samples_per_frame(vgmstream);
samples_count/=vgmstream->channels;
}
do {
if(read_32bitBE(vgmstream->next_block_offset,vgmstream->ch[0].streamfile)==0x31534E6C) {
ea_header->dwLoopStart=read_32bitLE(vgmstream->next_block_offset+0x08,vgmstream->ch[0].streamfile);
vgmstream->next_block_offset+=0x0C;
}
if(read_32bitBE(vgmstream->next_block_offset,vgmstream->ch[0].streamfile)==0x31534E65)
break;
eacs_block_update(vgmstream->next_block_offset,vgmstream);
samples_count+=vgmstream->current_block_size/get_vgmstream_frame_size(vgmstream)*get_vgmstream_samples_per_frame(vgmstream);
} while(vgmstream->next_block_offset<get_streamfile_size(streamFile)-8);
// Reset values ...
// setting up the first header by calling the eacs_block_update sub
if(little_endian)
vgmstream->next_block_offset=read_32bitBE(0x04,streamFile);
else
vgmstream->next_block_offset=read_32bitLE(0x04,streamFile);
vgmstream->current_block_size=vgmstream->next_block_offset-sizeof(EACSHeader);
if(vgmstream->coding_type!=coding_PSX)
vgmstream->current_block_size-=8;
if(vgmstream->coding_type==coding_PSX)
eacs_block_update(0x2C,vgmstream);
else
eacs_block_update(0x28,vgmstream);
// re-allocate the sample count
vgmstream->num_samples=samples_count;
if(loop_flag) {
vgmstream->loop_start_sample = ea_header->dwLoopStart;
vgmstream->loop_end_sample = vgmstream->num_samples;
}
if(ea_header)
free(ea_header);
return vgmstream;
/* clean up anything we may have opened */
fail:
if(ea_header)
free(ea_header);
if (vgmstream) close_vgmstream(vgmstream);
return NULL;
}
void render_vgmstream_blocked(sample * buffer, int32_t sample_count, VGMSTREAM * vgmstream) {
int samples_written=0;
int frame_size = get_vgmstream_frame_size(vgmstream);
int samples_per_frame = get_vgmstream_samples_per_frame(vgmstream);
int samples_this_block;
if (frame_size == 0) {
/* assume 4 bit */
/* TODO: get_vgmstream_frame_size() really should return bits... */
samples_this_block = vgmstream->current_block_size * 2 * samples_per_frame;
} else {
samples_this_block = vgmstream->current_block_size / frame_size * samples_per_frame;
}
while (samples_written<sample_count) {
int samples_to_do;
if (vgmstream->loop_flag && vgmstream_do_loop(vgmstream)) {
if (frame_size == 0) {
samples_this_block = vgmstream->current_block_size * 2 * samples_per_frame;
} else {
samples_this_block = vgmstream->current_block_size / frame_size * samples_per_frame;
}
continue;
}
samples_to_do = vgmstream_samples_to_do(samples_this_block, samples_per_frame, vgmstream);
if (samples_written+samples_to_do > sample_count)
samples_to_do=sample_count-samples_written;
if (vgmstream->current_block_offset>=0)
decode_vgmstream(vgmstream, samples_written, samples_to_do, buffer);
else {
int i;
/* we've run off the end! */
for (i=samples_written*vgmstream->channels;
i<(samples_written+samples_to_do)*vgmstream->channels; i++)
buffer[i]=0;
}
samples_written += samples_to_do;
vgmstream->current_sample += samples_to_do;
vgmstream->samples_into_block+=samples_to_do;
if (vgmstream->samples_into_block==samples_this_block) {
switch (vgmstream->layout_type) {
case layout_ast_blocked:
ast_block_update(vgmstream->next_block_offset,vgmstream);
break;
case layout_halpst_blocked:
if (vgmstream->next_block_offset>=0)
halpst_block_update(vgmstream->next_block_offset,vgmstream);
else
vgmstream->current_block_offset=-1;
break;
case layout_xa_blocked:
xa_block_update(vgmstream->next_block_offset,vgmstream);
break;
case layout_ea_blocked:
ea_block_update(vgmstream->next_block_offset,vgmstream);
break;
case layout_eacs_blocked:
eacs_block_update(vgmstream->next_block_offset,vgmstream);
break;
case layout_caf_blocked:
caf_block_update(vgmstream->next_block_offset,vgmstream);
break;
case layout_wsi_blocked:
wsi_block_update(vgmstream->next_block_offset,vgmstream);
break;
case layout_str_snds_blocked:
str_snds_block_update(vgmstream->next_block_offset,vgmstream);
break;
case layout_ws_aud_blocked:
ws_aud_block_update(vgmstream->next_block_offset,vgmstream);
break;
case layout_matx_blocked:
matx_block_update(vgmstream->next_block_offset,vgmstream);
break;
case layout_de2_blocked:
de2_block_update(vgmstream->next_block_offset,vgmstream);
break;
case layout_emff_ps2_blocked:
emff_ps2_block_update(vgmstream->next_block_offset,vgmstream);
break;
case layout_emff_ngc_blocked:
emff_ngc_block_update(vgmstream->next_block_offset,vgmstream);
break;
case layout_gsb_blocked:
gsb_block_update(vgmstream->next_block_offset,vgmstream);
break;
case layout_vs_blocked:
vs_block_update(vgmstream->next_block_offset,vgmstream);
break;
case layout_xvas_blocked:
xvas_block_update(vgmstream->next_block_offset,vgmstream);
break;
case layout_thp_blocked:
thp_block_update(vgmstream->next_block_offset,vgmstream);
break;
case layout_filp_blocked:
filp_block_update(vgmstream->next_block_offset,vgmstream);
break;
default:
break;
}
/* for VBR these may change */
frame_size = get_vgmstream_frame_size(vgmstream);
samples_per_frame = get_vgmstream_samples_per_frame(vgmstream);
if (frame_size == 0) {
samples_this_block = vgmstream->current_block_size * 2 * samples_per_frame;
} else {
samples_this_block = vgmstream->current_block_size / frame_size * samples_per_frame;
}
vgmstream->samples_into_block=0;
}
}
}
