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Commit e6e2b83b authored by Timothy B. Terriberry's avatar Timothy B. Terriberry
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Mark more internal pointers const. 

Don't know if this actually leads to any better code generation,
 but it may make the code a little clearer.
parent 23c8a83d
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src/opusfile.c
View file @ e6e2b83b
......@@ -167,7 +167,7 @@ static int op_seek_helper(OggOpusFile *_of,opus_int64 _offset){
/*Get the current position indicator of the underlying source.
This should be the same as the value reported by tell().*/
static opus_int64 op_position(OggOpusFile *_of){
static opus_int64 op_position(const OggOpusFile *_of){
/*The current position indicator is _not_ simply offset.
We may also have unprocessed, buffered data in the sync state.*/
return _of->offset+_of->oy.fill-_of->oy.returned;
......@@ -226,7 +226,7 @@ static opus_int64 op_get_next_page(OggOpusFile *_of,ogg_page *_og,
return OP_FALSE;
}
static int op_add_serialno(ogg_page *_og,
static int op_add_serialno(const ogg_page *_og,
ogg_uint32_t **_serialnos,int *_nserialnos,int *_cserialnos){
ogg_uint32_t *serialnos;
int nserialnos;
......@@ -259,7 +259,7 @@ static int op_lookup_serialno(ogg_uint32_t _s,
return i<_nserialnos;
}
static int op_lookup_page_serialno(ogg_page *_og,
static int op_lookup_page_serialno(const ogg_page *_og,
const ogg_uint32_t *_serialnos,int _nserialnos){
return op_lookup_serialno(ogg_page_serialno(_og),_serialnos,_nserialnos);
}
......@@ -1147,7 +1147,7 @@ static int op_bisect_forward_serialno(OggOpusFile *_of,
(potentially not a page we care about).*/
/*Scan the seek records we already have to save us some bisection.*/
for(sri=0;sri<nsr;sri++){
if(op_lookup_serialno(_sr[sri].serialno,*_serialnos,*_nserialnos))break;
if(op_lookup_serialno(_sr[sri].serialno,serialnos,nserialnos))break;
}
/*Is the last page in our current list of serial numbers?*/
if(sri<=0)break;
......@@ -1333,11 +1333,11 @@ static void op_update_gain(OggOpusFile *_of){
}
static int op_make_decode_ready(OggOpusFile *_of){
OpusHead *head;
int li;
int stream_count;
int coupled_count;
int channel_count;
const OpusHead *head;
int li;
int stream_count;
int coupled_count;
int channel_count;
if(_of->ready_state>OP_STREAMSET)return 0;
if(OP_UNLIKELY(_of->ready_state<OP_STREAMSET))return OP_EFAULT;
li=_of->seekable?_of->cur_link:0;
......@@ -1519,14 +1519,12 @@ static int op_open1(OggOpusFile *_of,
seekable=_cb->seek!=NULL&&(*_cb->seek)(_source,0,SEEK_CUR)!=-1;
/*If seek is implemented, tell must also be implemented.*/
if(seekable){
opus_int64 pos;
if(OP_UNLIKELY(_of->callbacks.tell==NULL))return OP_EINVAL;
else{
opus_int64 pos;
pos=(*_of->callbacks.tell)(_of->source);
/*If the current position is not equal to the initial bytes consumed,
absolute seeking will not work.*/
if(OP_UNLIKELY(pos!=(opus_int64)_initial_bytes))return OP_EINVAL;
}
pos=(*_of->callbacks.tell)(_of->source);
/*If the current position is not equal to the initial bytes consumed,
absolute seeking will not work.*/
if(OP_UNLIKELY(pos!=(opus_int64)_initial_bytes))return OP_EINVAL;
}
_of->seekable=seekable;
/*Don't seek yet.
......@@ -2084,7 +2082,7 @@ static int op_fetch_and_process_page(OggOpusFile *_of,
}
int op_raw_seek(OggOpusFile *_of,opus_int64 _pos){
int ret;
int ret;
if(OP_UNLIKELY(_of->ready_state<OP_OPENED))return OP_EINVAL;
/*Don't dump the decoder state if we can't seek.*/
if(OP_UNLIKELY(!_of->seekable))return OP_ENOSEEK;
......@@ -2115,10 +2113,10 @@ int op_raw_seek(OggOpusFile *_of,opus_int64 _pos){
position in an individual link.*/
static ogg_int64_t op_get_granulepos(const OggOpusFile *_of,
ogg_int64_t _pcm_offset,int *_li){
OggOpusLink *links;
ogg_int64_t duration;
int nlinks;
int li;
const OggOpusLink *links;
ogg_int64_t duration;
int nlinks;
int li;
OP_ASSERT(_pcm_offset>=0);
nlinks=_of->nlinks;
links=_of->links;
......@@ -2166,25 +2164,25 @@ static ogg_int64_t op_get_granulepos(const OggOpusFile *_of,
Account for that (and report it as an error condition).*/
static int op_pcm_seek_page(OggOpusFile *_of,
ogg_int64_t _target_gp,int _li){
OggOpusLink *link;
ogg_page og;
ogg_int64_t pcm_pre_skip;
ogg_int64_t pcm_start;
ogg_int64_t pcm_end;
ogg_int64_t best_gp;
ogg_int64_t diff;
ogg_uint32_t serialno;
opus_int32 pre_skip;
opus_int64 begin;
opus_int64 end;
opus_int64 boundary;
opus_int64 best;
opus_int64 page_offset;
opus_int64 d0;
opus_int64 d1;
opus_int64 d2;
int force_bisect;
int ret;
const OggOpusLink *link;
ogg_page og;
ogg_int64_t pcm_pre_skip;
ogg_int64_t pcm_start;
ogg_int64_t pcm_end;
ogg_int64_t best_gp;
ogg_int64_t diff;
ogg_uint32_t serialno;
opus_int32 pre_skip;
opus_int64 begin;
opus_int64 end;
opus_int64 boundary;
opus_int64 best;
opus_int64 page_offset;
opus_int64 d0;
opus_int64 d1;
opus_int64 d2;
int force_bisect;
int ret;
_of->bytes_tracked=0;
_of->samples_tracked=0;
link=_of->links+_li;
......@@ -2405,16 +2403,16 @@ static int op_pcm_seek_page(OggOpusFile *_of,
}
int op_pcm_seek(OggOpusFile *_of,ogg_int64_t _pcm_offset){
OggOpusLink *link;
ogg_int64_t pcm_start;
ogg_int64_t target_gp;
ogg_int64_t prev_packet_gp;
ogg_int64_t skip;
ogg_int64_t diff;
int op_count;
int op_pos;
int ret;
int li;
const OggOpusLink *link;
ogg_int64_t pcm_start;
ogg_int64_t target_gp;
ogg_int64_t prev_packet_gp;
ogg_int64_t skip;
ogg_int64_t diff;
int op_count;
int op_pos;
int ret;
int li;
if(OP_UNLIKELY(_of->ready_state<OP_OPENED))return OP_EINVAL;
if(OP_UNLIKELY(!_of->seekable))return OP_ENOSEEK;
if(OP_UNLIKELY(_pcm_offset<0))return OP_EINVAL;
......@@ -2503,10 +2501,10 @@ opus_int64 op_raw_tell(const OggOpusFile *_of){
For unseekable sources, this gets reset to 0 at the beginning of each link.*/
static ogg_int64_t op_get_pcm_offset(const OggOpusFile *_of,
ogg_int64_t _gp,int _li){
OggOpusLink *links;
ogg_int64_t pcm_offset;
ogg_int64_t delta;
int li;
const OggOpusLink *links;
ogg_int64_t pcm_offset;
ogg_int64_t delta;
int li;
links=_of->links;
pcm_offset=0;
OP_ASSERT(_li<_of->nlinks);
......@@ -2579,9 +2577,9 @@ void op_set_dither_enabled(OggOpusFile *_of,int _enabled){
static int op_init_buffer(OggOpusFile *_of){
int nchannels_max;
if(_of->seekable){
OggOpusLink *links;
int nlinks;
int li;
const OggOpusLink *links;
int nlinks;
int li;
links=_of->links;
nlinks=_of->nlinks;
nchannels_max=1;
......@@ -2657,11 +2655,11 @@ static int op_read_native(OggOpusFile *_of,
/*If we have buffered packets, decode one.*/
op_pos=_of->op_pos;
if(OP_LIKELY(op_pos<_of->op_count)){
ogg_packet *pop;
ogg_int64_t diff;
opus_int32 cur_discard_count;
int duration;
int trimmed_duration;
const ogg_packet *pop;
ogg_int64_t diff;
opus_int32 cur_discard_count;
int duration;
int trimmed_duration;
pop=_of->op+op_pos++;
_of->op_pos=op_pos;
cur_discard_count=_of->cur_discard_count;
......@@ -2743,6 +2741,9 @@ static int op_read_native(OggOpusFile *_of,
}
}
/*A generic filter to apply to the decoded audio data.
_src is non-const because we will destructively modify the contents of the
source buffer that we consume in some cases.*/
typedef int (*op_read_filter_func)(OggOpusFile *_of,void *_dst,int _dst_sz,
op_sample *_src,int _nsamples,int _nchannels);
......
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