/* Decodes samples for segmented streams.
* Chains together sequential vgmstreams, for data divided into separate sections or files
* (like one part for intro and other for loop segments, which may even use different codecs). */
void render_vgmstream_segmented(sample * buffer, int32_t sample_count, VGMSTREAM * vgmstream) {
int samples_written = 0;
segmented_layout_data *data = vgmstream->layout_data;
while (samples_written < sample_count) {
int samples_to_do;
int samples_this_block = data->segments[data->current_segment]->num_samples;
if (vgmstream->loop_flag && vgmstream_do_loop(vgmstream)) {
/* handle looping, finding loop segment */
int loop_segment = 0, samples = 0, loop_samples_skip = 0;
while (samples < vgmstream->num_samples) {
int32_t segment_samples = data->segments[loop_segment]->num_samples;
if (vgmstream->loop_start_sample >= samples && vgmstream->loop_start_sample < samples + segment_samples) {
loop_samples_skip = vgmstream->loop_start_sample - samples;
break; /* loop_start falls within loop_segment's samples */
}
samples += segment_samples;
loop_segment++;
}
if (loop_segment == data->segment_count) {
VGM_LOG("segmented_layout: can't find loop segment\n");
loop_segment = 0;
}
if (loop_samples_skip > 0) {
VGM_LOG("segmented_layout: loop starts after %i samples\n", loop_samples_skip);
//todo skip/fix, but probably won't happen
}
data->current_segment = loop_segment;
reset_vgmstream(data->segments[data->current_segment]);
vgmstream->samples_into_block = 0;
continue;
}
samples_to_do = vgmstream_samples_to_do(samples_this_block, sample_count, vgmstream);
if (samples_to_do > sample_count - samples_written)
samples_to_do = sample_count - samples_written;
/* detect segment change and restart */
if (samples_to_do == 0) {
data->current_segment++;
reset_vgmstream(data->segments[data->current_segment]);
vgmstream->samples_into_block = 0;
continue;
}
render_vgmstream(&buffer[samples_written*data->segments[data->current_segment]->channels],
samples_to_do,data->segments[data->current_segment]);
samples_written += samples_to_do;
vgmstream->current_sample += samples_to_do;
vgmstream->samples_into_block += samples_to_do;
}
}
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;
}
}
}
