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Diffstat (limited to 'src/opusfile-0.2/src/info.c')
-rw-r--r--src/opusfile-0.2/src/info.c286
1 files changed, 0 insertions, 286 deletions
diff --git a/src/opusfile-0.2/src/info.c b/src/opusfile-0.2/src/info.c
deleted file mode 100644
index 62edecdb..00000000
--- a/src/opusfile-0.2/src/info.c
+++ /dev/null
@@ -1,286 +0,0 @@
-/********************************************************************
- * *
- * THIS FILE IS PART OF THE libopusfile SOFTWARE CODEC SOURCE CODE. *
- * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
- * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
- * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
- * *
- * THE libopusfile SOURCE CODE IS (C) COPYRIGHT 2012 *
- * by the Xiph.Org Foundation and contributors http://www.xiph.org/ *
- * *
- ********************************************************************/
-#include "internal.h"
-#include <limits.h>
-#include <string.h>
-
-static unsigned op_parse_uint16le(const unsigned char *_data){
- return _data[0]|_data[1]<<8;
-}
-
-static int op_parse_int16le(const unsigned char *_data){
- int ret;
- ret=_data[0]|_data[1]<<8;
- return (ret^0x8000)-0x8000;
-}
-
-static opus_uint32 op_parse_uint32le(const unsigned char *_data){
- return _data[0]|_data[1]<<8|_data[2]<<16|_data[3]<<24;
-}
-
-int opus_head_parse(OpusHead *_head,const unsigned char *_data,size_t _len){
- OpusHead head;
- if(_len<8)return OP_ENOTFORMAT;
- if(memcmp(_data,"OpusHead",8)!=0)return OP_ENOTFORMAT;
- if(_len<9)return OP_EBADHEADER;
- head.version=_data[8];
- if(head.version>15)return OP_EVERSION;
- if(_len<19)return OP_EBADHEADER;
- head.channel_count=_data[9];
- head.pre_skip=op_parse_uint16le(_data+10);
- head.input_sample_rate=op_parse_uint32le(_data+12);
- head.output_gain=op_parse_int16le(_data+16);
- head.mapping_family=_data[18];
- if(head.mapping_family==0){
- if(head.channel_count<1||head.channel_count>2)return OP_EBADHEADER;
- if(head.version<=1&&_len>19)return OP_EBADHEADER;
- head.stream_count=1;
- head.coupled_count=head.channel_count-1;
- if(_head!=NULL){
- _head->mapping[0]=0;
- _head->mapping[1]=1;
- }
- }
- else if(head.mapping_family==1){
- size_t size;
- int ci;
- if(head.channel_count<1||head.channel_count>8)return OP_EBADHEADER;
- size=21+head.channel_count;
- if(_len<size||head.version<=1&&_len>size)return OP_EBADHEADER;
- head.stream_count=_data[19];
- if(head.stream_count<1)return OP_EBADHEADER;
- head.coupled_count=_data[20];
- if(head.coupled_count>head.stream_count)return OP_EBADHEADER;
- for(ci=0;ci<head.channel_count;ci++){
- if(_data[21+ci]>=head.stream_count+head.coupled_count
- &&_data[21+ci]!=255){
- return OP_EBADHEADER;
- }
- }
- if(_head!=NULL)memcpy(_head->mapping,_data+21,head.channel_count);
- }
- /*General purpose players should not attempt to play back content with
- channel mapping family 255.*/
- else if(head.mapping_family==255)return OP_EIMPL;
- /*No other channel mapping families are currently defined.*/
- else return OP_EBADHEADER;
- if(_head!=NULL)memcpy(_head,&head,head.mapping-(unsigned char *)&head);
- return 0;
-}
-
-void opus_tags_init(OpusTags *_tags){
- memset(_tags,0,sizeof(*_tags));
-}
-
-void opus_tags_clear(OpusTags *_tags){
- int i;
- for(i=_tags->comments;i-->0;)_ogg_free(_tags->user_comments[i]);
- _ogg_free(_tags->user_comments);
- _ogg_free(_tags->comment_lengths);
- _ogg_free(_tags->vendor);
-}
-
-/*The actual implementation of opus_tags_parse().
- Unlike the public API, this function requires _tags to already be
- initialized, modifies its contents before success is guaranteed, and assumes
- the caller will clear it on error.*/
-int opus_tags_parse_impl(OpusTags *_tags,
- const unsigned char *_data,size_t _len){
- opus_uint32 count;
- size_t size;
- size_t len;
- int ncomments;
- int i;
- len=_len;
- if(len<8)return OP_ENOTFORMAT;
- if(memcmp(_data,"OpusTags",8)!=0)return OP_ENOTFORMAT;
- if(len<16)return OP_EBADHEADER;
- _data+=8;
- len-=8;
- count=op_parse_uint32le(_data);
- _data+=4;
- len-=4;
- if(count>len)return OP_EBADHEADER;
- if(_tags!=NULL){
- char *vendor;
- size=count+1;
- if(size<count)return OP_EFAULT;
- vendor=(char *)_ogg_malloc(size);
- if(vendor==NULL)return OP_EFAULT;
- memcpy(vendor,_data,count);
- vendor[count]='\0';
- _tags->vendor=vendor;
- }
- _data+=count;
- len-=count;
- if(len<4)return OP_EBADHEADER;
- count=op_parse_uint32le(_data);
- _data+=4;
- len-=4;
- /*Check to make sure there's minimally sufficient data left in the packet.*/
- if(count>len>>2)return OP_EBADHEADER;
- /*Check for overflow (the API limits this to an int).*/
- if(count>(opus_uint32)INT_MAX-1)return OP_EFAULT;
- if(_tags!=NULL){
- size=sizeof(*_tags->comment_lengths)*(count+1);
- if(size/sizeof(*_tags->comment_lengths)!=count+1)return OP_EFAULT;
- _tags->comment_lengths=(int *)_ogg_malloc(size);
- size=sizeof(*_tags->user_comments)*(count+1);
- if(size/sizeof(*_tags->user_comments)!=count+1)return OP_EFAULT;
- _tags->user_comments=(char **)_ogg_malloc(size);
- if(_tags->comment_lengths==NULL||_tags->user_comments==NULL){
- return OP_EFAULT;
- }
- }
- ncomments=(int)count;
- for(i=0;i<ncomments;i++){
- /*Check to make sure there's minimally sufficient data left in the packet.*/
- if((size_t)(ncomments-i)>len>>2)return OP_EBADHEADER;
- count=op_parse_uint32le(_data);
- _data+=4;
- len-=4;
- if(count>len)return OP_EBADHEADER;
- /*Check for overflow (the API limits this to an int).*/
- if(count>(opus_uint32)INT_MAX)return OP_EFAULT;
- if(_tags!=NULL){
- _tags->comment_lengths[i]=(int)count;
- size=count+1;
- if(size<count)return OP_EFAULT;
- _tags->user_comments[i]=(char *)_ogg_malloc(size);
- if(_tags->user_comments[i]==NULL)return OP_EFAULT;
- _tags->comments=i+1;
- memcpy(_tags->user_comments[i],_data,count);
- _tags->user_comments[i][count]='\0';
- }
- _data+=count;
- len-=count;
- }
- if(_tags!=NULL){
- _tags->user_comments[ncomments]=NULL;
- _tags->comment_lengths[ncomments]=0;
- }
- return 0;
-}
-
-int opus_tags_parse(OpusTags *_tags,const unsigned char *_data,size_t _len){
- if(_tags!=NULL){
- OpusTags tags;
- int ret;
- opus_tags_init(&tags);
- ret=opus_tags_parse_impl(&tags,_data,_len);
- if(ret<0)opus_tags_clear(&tags);
- else *_tags=*&tags;
- return ret;
- }
- else return opus_tags_parse_impl(NULL,_data,_len);
-}
-
-/*Add room for a new comment.*/
-static int op_tags_add_prepare(OpusTags *_tags){
- char **user_comments;
- int *comment_lengths;
- int ncomments;
- ncomments=_tags->comments;
- user_comments=_ogg_realloc(_tags->user_comments,
- sizeof(*_tags->user_comments)*(ncomments+2));
- if(OP_UNLIKELY(user_comments==NULL))return OP_EFAULT;
- _tags->user_comments=user_comments;
- comment_lengths=_ogg_realloc(_tags->comment_lengths,
- sizeof(*_tags->comment_lengths)*(ncomments+2));
- if(OP_UNLIKELY(comment_lengths==NULL))return OP_EFAULT;
- _tags->comment_lengths=comment_lengths;
- comment_lengths[ncomments]=comment_lengths[ncomments+1]=0;
- /*Our caller will always set user_comments[ncomments].*/
- user_comments[ncomments+1]=NULL;
- return 0;
-}
-
-int opus_tags_add(OpusTags *_tags,const char *_tag,const char *_value){
- char *comment;
- int tag_len;
- int value_len;
- int ncomments;
- int ret;
- ret=op_tags_add_prepare(_tags);
- if(OP_UNLIKELY(ret<0))return ret;
- tag_len=strlen(_tag);
- value_len=strlen(_value);
- ncomments=_tags->comments;
- /*+2 for '=' and '\0'.*/
- _tags->user_comments[ncomments]=comment=
- (char *)_ogg_malloc(sizeof(*comment)*(tag_len+value_len+2));
- if(OP_UNLIKELY(comment==NULL))return OP_EFAULT;
- _tags->comment_lengths[ncomments]=tag_len+value_len+1;
- memcpy(comment,_tag,sizeof(*comment)*tag_len);
- comment[tag_len]='=';
- memcpy(comment+tag_len+1,_value,sizeof(*comment)*(value_len+1));
- return 0;
-}
-
-int opus_tags_add_comment(OpusTags *_tags,const char *_comment){
- char *comment;
- int ncomments;
- int comment_len;
- int ret;
- ret=op_tags_add_prepare(_tags);
- if(OP_UNLIKELY(ret<0))return ret;
- comment_len=strlen(_comment);
- ncomments=_tags->comments;
- _tags->user_comments[ncomments]=comment=(char *)
- _ogg_malloc(sizeof(*_tags->user_comments[ncomments])*(comment_len+1));
- if(OP_UNLIKELY(comment==NULL))return OP_EFAULT;
- _tags->comment_lengths[ncomments]=comment_len;
- memcpy(comment,_comment,sizeof(*comment)*(comment_len+1));
- return 0;
-}
-
-/*Is _a a "tag=value" comment whose tag matches _b?
- 0 if it is, a non-zero value otherwise.*/
-static int op_tagcompare(const char *_a,const char *_b,int _n){
- return op_strncasecmp(_a,_b,_n)||_a[_n]!='=';
-}
-
-const char *opus_tags_query(const OpusTags *_tags,const char *_tag,int _count){
- char **user_comments;
- int tag_len;
- int found;
- int ncomments;
- int ci;
- tag_len=strlen(_tag);
- ncomments=_tags->comments;
- user_comments=_tags->user_comments;
- found=0;
- for(ci=0;ci<ncomments;ci++){
- if(!op_tagcompare(user_comments[ci],_tag,tag_len)){
- /*We return a pointer to the data, not a copy.*/
- if(_count==found++)return user_comments[ci]+tag_len+1;
- }
- }
- /*Didn't find anything.*/
- return NULL;
-}
-
-int opus_tags_query_count(const OpusTags *_tags,const char *_tag){
- char **user_comments;
- int tag_len;
- int found;
- int ncomments;
- int ci;
- tag_len=strlen(_tag);
- ncomments=_tags->comments;
- user_comments=_tags->user_comments;
- found=0;
- for(ci=0;ci<ncomments;ci++){
- if(!op_tagcompare(user_comments[ci],_tag,tag_len))found++;
- }
- return found;
-}
generated by cgit (git 2.34.1) at 2025-04-10 16:58:55 +0000