ref: d87be719523969fdab7b27ce506e4c783da5d21b
dir: /opusfile/
--- /dev/null Wed Jan 8 06:24:14 2020
+++ mkfile Sat Feb 1 20:41:39 2020
@@ -0,0 +1,34 @@
+APE=/sys/src/ape
+<$APE/config
+
+LIB=/$objtype/lib/ape/libopusfile.a
+
+OFILES=\
+ info.$O \
+ internal.$O \
+ opusfile.$O \
+ stream.$O \
+
+HFILES=\
+ /sys/include/ape/opus/opusfile.h \
+
+UPDATE=\
+ mkfile\
+ $HFILES\
+ ${OFILES:%.$O=%.c}\
+
+</sys/src/cmd/mksyslib
+
+CFLAGS=$CFLAGS -c\
+ -Iinclude \
+ -I/sys/src/cmd/audio/libogg \
+ -I/sys/include/ape/opus \
+ -DPACKAGE_VERSION="fuckoff" \
+ -D_POSIX_SOURCE
+
+%.$O: src/%.c
+ $CC $CFLAGS src/$stem.c
+
+$HFILES:
+ mkdir -p /sys/include/ape/opus
+ dircp include /sys/include/ape/opus
--- /mnt/git/branch/heads/master/tree/src/opusfile.c Wed Oct 3 05:33:45 2018
+++ src/opusfile.c Sat Feb 1 20:59:18 2020
@@ -327,7 +327,9 @@ static int op_get_prev_page_serial(OggOp
opus_int64 original_end;
opus_int32 chunk_size;
int preferred_found;
- original_end=end=begin=_offset;
+ original_end=_offset;
+ end=_offset;
+ begin=_offset;
preferred_found=0;
_offset=-1;
chunk_size=OP_CHUNK_SIZE;
@@ -350,7 +352,8 @@ static int op_get_prev_page_serial(OggOp
We're not interested in the page itself... just the serial number, byte
offset, page size, and granule position.*/
_sr->search_start=search_start;
- _sr->offset=_offset=llret;
+ _sr->offset=llret;
+ _offset=llret;
_sr->serialno=serialno;
OP_ASSERT(_of->offset-_offset>=0);
OP_ASSERT(_of->offset-_offset<=OP_PAGE_SIZE_MAX);
@@ -416,7 +419,9 @@ static opus_int64 op_get_last_page(OggOp
opus_int32 chunk_size;
/*The target serial number must belong to the current link.*/
OP_ASSERT(op_lookup_serialno(_serialno,_serialnos,_nserialnos));
- original_end=end=begin=_offset;
+ begin=_offset;
+ end=_offset;
+ original_end=_offset;
_offset=-1;
/*We shouldn't have to initialize gp, but gcc is too dumb to figure out that
ret>=0 implies we entered the if(page_gp!=-1) block at least once.*/
@@ -859,7 +864,8 @@ static int op_find_initial_pcm_offset(Og
_link->pcm_file_offset=0;
/*Set pcm_end and end_offset so we can skip the call to
op_find_final_pcm_offset().*/
- _link->pcm_start=_link->pcm_end=0;
+ _link->pcm_start=0;
+ _link->pcm_end=0;
_link->end_offset=_link->data_offset;
return 0;
}
@@ -869,7 +875,8 @@ static int op_find_initial_pcm_offset(Og
/*Set pcm_end and end_offset so we can skip the call to
op_find_final_pcm_offset().*/
_link->pcm_file_offset=0;
- _link->pcm_start=_link->pcm_end=0;
+ _link->pcm_start=0;
+ _link->pcm_end=0;
_link->end_offset=_link->data_offset;
/*Tell the caller we've got a buffered page for them.*/
return 1;
@@ -939,7 +946,8 @@ static int op_find_initial_pcm_offset(Og
/*If we trimmed the entire packet, stop (the spec says encoders
shouldn't do this, but we support it anyway).*/
if(OP_UNLIKELY(diff>durations[pi]))break;
- _of->op[pi].granulepos=prev_packet_gp=cur_page_gp;
+ _of->op[pi].granulepos=cur_page_gp;
+ prev_packet_gp=cur_page_gp;
/*Move the EOS flag to this packet, if necessary, so we'll trim the
samples.*/
_of->op[pi].e_o_s=1;
@@ -955,7 +963,8 @@ static int op_find_initial_pcm_offset(Og
_of->op_count=pi;
_of->cur_discard_count=_link->head.pre_skip;
_link->pcm_file_offset=0;
- _of->prev_packet_gp=_link->pcm_start=pcm_start;
+ _of->prev_packet_gp=pcm_start;
+ _link->pcm_start=pcm_start;
_of->prev_page_offset=page_offset;
return 0;
}
@@ -1396,7 +1405,8 @@ static int op_open_seekable2_impl(OggOpu
int ret;
/*We can seek, so set out learning all about this file.*/
(*_of->callbacks.seek)(_of->stream,0,SEEK_END);
- _of->offset=_of->end=(*_of->callbacks.tell)(_of->stream);
+ _of->offset=(*_of->callbacks.tell)(_of->stream);
+ _of->end=(*_of->callbacks.tell)(_of->stream);
if(OP_UNLIKELY(_of->end<0))return OP_EREAD;
data_offset=_of->links[0].data_offset;
if(OP_UNLIKELY(_of->end<data_offset))return OP_EBADLINK;
@@ -2280,10 +2290,13 @@ static int op_pcm_seek_page(OggOpusFile
_of->bytes_tracked=0;
_of->samples_tracked=0;
link=_of->links+_li;
- best_gp=pcm_start=link->pcm_start;
+ best_gp=link->pcm_start;
+ pcm_start=link->pcm_start;
pcm_end=link->pcm_end;
serialno=link->serialno;
- best=best_start=begin=link->data_offset;
+ best=link->data_offset;
+ best_start=link->data_offset;
+ begin=link->data_offset;
page_offset=-1;
buffering=0;
/*We discard the first 80 ms of data after a seek, so seek back that much
@@ -2296,9 +2309,12 @@ static int op_pcm_seek_page(OggOpusFile
/*Special case seeking to the start of the link.*/
pre_skip=link->head.pre_skip;
OP_ALWAYS_TRUE(!op_granpos_add(&pcm_pre_skip,pcm_start,pre_skip));
- if(op_granpos_cmp(_target_gp,pcm_pre_skip)<0)end=boundary=begin;
- else{
- end=boundary=link->end_offset;
+ if(op_granpos_cmp(_target_gp,pcm_pre_skip)<0){
+ end=begin;
+ boundary=begin;
+ }else{
+ end=link->end_offset;
+ boundary=link->end_offset;
#if !defined(OP_SMALL_FOOTPRINT)
/*If we were decoding from this link, we can narrow the range a bit.*/
if(_li==_of->cur_link&&_of->ready_state>=OP_INITSET){
@@ -2329,8 +2345,10 @@ static int op_pcm_seek_page(OggOpusFile
if(diff<0){
OP_ASSERT(offset>=begin);
if(offset-begin>=end-begin>>1||diff>-OP_CUR_TIME_THRESH){
- best=begin=offset;
- best_gp=pcm_start=gp;
+ best=offset;
+ begin=offset;
+ best_gp=gp;
+ pcm_start=gp;
/*If we have buffered data from a continued packet, remember the
offset of the previous page's start, so that if we do wind up
having to seek back here later, we can prime the stream with
@@ -2369,7 +2387,8 @@ static int op_pcm_seek_page(OggOpusFile
Check if we can cut off at least half the range, though.*/
if(offset-begin<=end-begin>>1||diff<OP_CUR_TIME_THRESH){
/*We really want the page start here, but this will do.*/
- end=boundary=offset;
+ end=offset;
+ boundary=offset;
pcm_end=gp;
}
}
@@ -2386,7 +2405,9 @@ static int op_pcm_seek_page(OggOpusFile
_of->cur_link=_li;
_of->ready_state=OP_STREAMSET;
/*Initialize the interval size history.*/
- d2=d1=d0=end-begin;
+ d0=end-begin;
+ d1=d0;
+ d2=d0;
force_bisect=0;
while(begin<end){
opus_int64 bisect;
@@ -2490,7 +2511,8 @@ static int op_pcm_seek_page(OggOpusFile
}
/*Save the byte offset of the end of the page with this granule
position.*/
- best=best_start=begin;
+ best=begin;
+ best_start=begin;
/*Buffer any data from a continued packet, if necessary.
This avoids the need to seek back here if the next timestamp we
encounter while scanning forward lies after our target.*/
@@ -2506,7 +2528,8 @@ static int op_pcm_seek_page(OggOpusFile
/*Then force buffering on, so that if a packet starts (but does not
end) on the next page, we still avoid the extra seek back.*/
buffering=1;
- best_gp=pcm_start=gp;
+ best_gp=gp;
+ pcm_start=gp;
OP_ALWAYS_TRUE(!op_granpos_diff(&diff,_target_gp,pcm_start));
/*If we're more than a second away from our target, break out and
do another bisection.*/