Cool_Tools/vgmstream
1
0
Fork 0
mirror of https://github.com/vgmstream/vgmstream.git synced 2024-11-23 22:41:05 +01:00
Code Issues Packages Projects Releases Wiki Activity

Redundant stuff between interleave and nolayout moved into vgmstream. Other layouts should also be able to use this for common things.

Browse Source 
git-svn-id: https://vgmstream.svn.sourceforge.net/svnroot/vgmstream@18 51a99a44-fe44-0410-b1ba-c3e57ba2b86b
This commit is contained in:
halleyscometsw 2008-02-05 06:21:57 +00:00
parent d80919154b
commit 00c1a3abdb
4 changed files with 78 additions and 104 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

68
src/layout/interleave.c
View File

@ -16,71 +16,14 @@ void render_vgmstream_interleave(sample * buffer, int32_t sample_count, VGMSTREA
}
while (samples_written<sample_count) {
int samples_to_do;
int chan;
int samples_left_this_block;
/*samples_this_block -= vgmstream->samples_into_block;*/
samples_left_this_block = samples_this_block - vgmstream->samples_into_block;
samples_to_do = samples_left_this_block;
/* fun loopy crap */
/* Why did I think this would be any simpler? */
if (vgmstream->loop_flag) {
/* is this the loop end? */
if (vgmstream->current_sample==vgmstream->loop_end_sample) {
/* depending on the codec we may not want to copy all of the state */
/*
switch (vgmstream->coding_type) {
case coding_CRI_ADX:
case coding_NGC_DSP:
{
int i;
for (i=0;i<vgmstream->channels;i++) {
vgmstream->loop_ch[i].adpcm_history1_32 = vgmstream->ch[i].adpcm_history1_32;
vgmstream->loop_ch[i].adpcm_history2_32 = vgmstream->ch[i].adpcm_history2_32;
}
}
break;
default:
break;
}
*/
/* restore! */
memcpy(vgmstream->ch,vgmstream->loop_ch,sizeof(VGMSTREAMCHANNEL)*vgmstream->channels);
vgmstream->current_sample=vgmstream->loop_sample;
vgmstream->samples_into_block=vgmstream->loop_samples_into_block;
samples_this_block = vgmstream->interleave_block_size / frame_size * samples_per_frame;
continue; /* recalculate stuff */
}
/* is this the loop start? */
if (!vgmstream->hit_loop && vgmstream->current_sample==vgmstream->loop_start_sample) {
/* save! */
memcpy(vgmstream->loop_ch,vgmstream->ch,sizeof(VGMSTREAMCHANNEL)*vgmstream->channels);
vgmstream->loop_sample=vgmstream->current_sample;
vgmstream->loop_samples_into_block=vgmstream->samples_into_block;
vgmstream->hit_loop=1;
}
/* are we going to hit the loop end during this block? */
if (vgmstream->current_sample+samples_left_this_block > vgmstream->loop_end_sample) {
/* only do to just before it */
samples_to_do = vgmstream->loop_end_sample-vgmstream->current_sample;
}
/* are we going to hit the loop start during this block? */
if (!vgmstream->hit_loop && vgmstream->current_sample+samples_left_this_block > vgmstream->loop_start_sample) {
/* only do to just before it */
samples_to_do = vgmstream->loop_start_sample-vgmstream->current_sample;
}
int samples_to_do;
if (vgmstream->loop_flag && vgmstream_do_loop(vgmstream)) {
samples_this_block = vgmstream->interleave_block_size / frame_size * samples_per_frame;
continue;
}
if (samples_per_frame>1 && (vgmstream->samples_into_block%samples_per_frame)+samples_to_do>samples_per_frame) samples_to_do=samples_per_frame-(vgmstream->samples_into_block%samples_per_frame);
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;
@ -92,6 +35,7 @@ void render_vgmstream_interleave(sample * buffer, int32_t sample_count, VGMSTREA
vgmstream->samples_into_block+=samples_to_do;
if (vgmstream->samples_into_block==samples_this_block) {
int chan;
if (vgmstream->layout_type == layout_interleave_shortblock &&
vgmstream->current_sample + samples_this_block > vgmstream->num_samples) {

45
src/layout/nolayout.c
View File

@ -9,51 +9,12 @@ void render_vgmstream_nolayout(sample * buffer, int32_t sample_count, VGMSTREAM
while (samples_written<sample_count) {
int samples_to_do;
int chan;
int samples_left_this_block;
samples_left_this_block = samples_this_block - vgmstream->samples_into_block;
samples_to_do = samples_left_this_block;
/* fun loopy crap */
/* Why did I think this would be any simpler? */
if (vgmstream->loop_flag) {
/* is this the loop end? */
if (vgmstream->current_sample==vgmstream->loop_end_sample) {
/* restore! */
memcpy(vgmstream->ch,vgmstream->loop_ch,sizeof(VGMSTREAMCHANNEL)*vgmstream->channels);
vgmstream->current_sample=vgmstream->loop_sample;
vgmstream->samples_into_block=vgmstream->loop_samples_into_block;
continue; /* recalculate stuff */
}
/* is this the loop start? */
if (!vgmstream->hit_loop && vgmstream->current_sample==vgmstream->loop_start_sample) {
/* save! */
memcpy(vgmstream->loop_ch,vgmstream->ch,sizeof(VGMSTREAMCHANNEL)*vgmstream->channels);
vgmstream->loop_sample=vgmstream->current_sample;
vgmstream->loop_samples_into_block=vgmstream->samples_into_block;
vgmstream->hit_loop=1;
}
/* are we going to hit the loop end during this block? */
if (vgmstream->current_sample+samples_left_this_block > vgmstream->loop_end_sample) {
/* only do to just before it */
samples_to_do = vgmstream->loop_end_sample-vgmstream->current_sample;
}
/* are we going to hit the loop start during this block? */
if (!vgmstream->hit_loop && vgmstream->current_sample+samples_left_this_block > vgmstream->loop_start_sample) {
/* only do to just before it */
samples_to_do = vgmstream->loop_start_sample-vgmstream->current_sample;
}
if (vgmstream->loop_flag && vgmstream_do_loop(vgmstream)) {
continue;
}
if (samples_per_frame > 1 && (vgmstream->samples_into_block%samples_per_frame)+samples_to_do>samples_per_frame) samples_to_do=samples_per_frame-(vgmstream->samples_into_block%samples_per_frame);
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;

57
src/vgmstream.c
View File

@ -188,3 +188,60 @@ void decode_vgmstream(VGMSTREAM * vgmstream, int samples_written, int samples_to
break;
}
}
int vgmstream_samples_to_do(int samples_this_block, int samples_per_frame, VGMSTREAM * vgmstream) {
int samples_to_do;
int samples_left_this_block;
samples_left_this_block = samples_this_block - vgmstream->samples_into_block;
samples_to_do = samples_left_this_block;
/* fun loopy crap */
/* Why did I think this would be any simpler? */
if (vgmstream->loop_flag) {
/* are we going to hit the loop end during this block? */
if (vgmstream->current_sample+samples_left_this_block > vgmstream->loop_end_sample) {
/* only do to just before it */
samples_to_do = vgmstream->loop_end_sample-vgmstream->current_sample;
}
/* are we going to hit the loop start during this block? */
if (!vgmstream->hit_loop && vgmstream->current_sample+samples_left_this_block > vgmstream->loop_start_sample) {
/* only do to just before it */
samples_to_do = vgmstream->loop_start_sample-vgmstream->current_sample;
}
}
/* if it's a framed encoding don't do more than one frame */
if (samples_per_frame>1 && (vgmstream->samples_into_block%samples_per_frame)+samples_to_do>samples_per_frame) samples_to_do=samples_per_frame-(vgmstream->samples_into_block%samples_per_frame);
return samples_to_do;
}
/* return 1 if we just looped */
int vgmstream_do_loop(VGMSTREAM * vgmstream) {
/* if (vgmstream->loop_flag) {*/
/* is this the loop end? */
if (vgmstream->current_sample==vgmstream->loop_end_sample) {
/* restore! */
memcpy(vgmstream->ch,vgmstream->loop_ch,sizeof(VGMSTREAMCHANNEL)*vgmstream->channels);
vgmstream->current_sample=vgmstream->loop_sample;
vgmstream->samples_into_block=vgmstream->loop_samples_into_block;
return 1;
}
/* is this the loop start? */
if (!vgmstream->hit_loop && vgmstream->current_sample==vgmstream->loop_start_sample) {
/* save! */
memcpy(vgmstream->loop_ch,vgmstream->ch,sizeof(VGMSTREAMCHANNEL)*vgmstream->channels);
vgmstream->loop_sample=vgmstream->current_sample;
vgmstream->loop_samples_into_block=vgmstream->samples_into_block;
vgmstream->hit_loop=1;
}
/*}*/
return 0;
}

12
src/vgmstream.h
View File

@ -139,14 +139,26 @@ VGMSTREAM * allocate_vgmstream(int channel_count, int looped);
/* deallocate, close, etc. */
void close_vgmstream(VGMSTREAM * vgmstream);
/* calculate the number of samples to be played based on looping parameters */
int32_t get_vgmstream_play_samples(double looptimes, double fadetime, VGMSTREAM * vgmstream);
/* render! */
void render_vgmstream(sample * buffer, int32_t sample_count, VGMSTREAM * vgmstream);
/* smallest self-contained group of samples is a frame */
int get_vgmstream_samples_per_frame(VGMSTREAM * vgmstream);
/* number of bytes per frame */
int get_vgmstream_frame_size(VGMSTREAM * vgmstream);
/* Assume that we have written samples_written into the buffer already, and we have samples_to_do consecutive
* samples ahead of us. Decode those samples into the buffer. */
void decode_vgmstream(VGMSTREAM * vgmstream, int samples_written, int samples_to_do, sample * buffer);
/* calculate number of consecutive samples to do (taking into account stopping for loop start and end) */
int vgmstream_samples_to_do(int samples_this_block, int samples_per_frame, VGMSTREAM * vgmstream);
/* Detect start and save values, also detect end and restore values. Only works on exact sample values.
* Returns 1 if loop was done. */
int vgmstream_do_loop(VGMSTREAM * vgmstream);
#endif