Introduced extraction of .au (but not its usage within cdrskin)
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e44b5c0465
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d2d1883356
@ -926,7 +926,7 @@ int Cdrtrack_extract_audio(struct CdrtracK *track, int *fd, off_t *xtr_size,
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#ifdef Cdrskin_libburn_has_audioxtR
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struct libdax_audioxtr *xtr= NULL;
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char *fmt,*fmt_info;
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int num_channels,sample_rate,bits_per_sample,ret;
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int num_channels,sample_rate,bits_per_sample,msb_first,ret;
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#endif
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*fd= -1;
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@ -952,7 +952,7 @@ int Cdrtrack_extract_audio(struct CdrtracK *track, int *fd, off_t *xtr_size,
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if(ret<=0)
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return(ret);
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libdax_audioxtr_get_id(xtr,&fmt,&fmt_info,
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&num_channels,&sample_rate,&bits_per_sample,0);
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&num_channels,&sample_rate,&bits_per_sample,&msb_first,0);
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if(strcmp(fmt,".wav")!=0 ||
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num_channels!=2 || sample_rate!=44100 || bits_per_sample!=16) {
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fprintf(stderr,"cdrskin: ( %s )\n",fmt_info);
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@ -1 +1 @@
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#define Cdrskin_timestamP "2006.10.23.134719"
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#define Cdrskin_timestamP "2006.10.24.075039"
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@ -41,11 +41,16 @@ int libdax_audioxtr_new(struct libdax_audioxtr **xtr, char *path, int flag)
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o->data_size= 0;
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o->extract_count= 0;
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o->wav_num_channels= 0;
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o->wav_sample_rate= 0;
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o->wav_bits_per_sample= 0;
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o->num_channels= 0;
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o->sample_rate= 0;
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o->bits_per_sample= 0;
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o->msb_first= 0;
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o->wav_subchunk2_size= 0;
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o->au_data_location= 0;
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o->au_data_size= 0xffffffff;
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ret= libdax_audioxtr_open(o,0);
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if(ret<=0)
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{ret= -2*(ret<0); goto failure;}
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@ -108,14 +113,19 @@ static int libdax_audioxtr_open(struct libdax_audioxtr *o, int flag)
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}
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static int libdax_audioxtr_identify(struct libdax_audioxtr *o, int flag)
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static int libdax_audioxtr_identify_wav(struct libdax_audioxtr *o, int flag)
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{
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int ret;
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char buf[45];
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/* currently this only works for MS WAVE files .wav */
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/* check wether this is a MS WAVE file .wav */
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/* info used: http://ccrma.stanford.edu/courses/422/projects/WaveFormat/ */
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if(o->fd!=0) {
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ret= lseek(o->fd,0,SEEK_SET);
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if(ret==-1)
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return(0);
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}
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ret= read(o->fd, buf, 44);
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if(ret<44)
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return(0);
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@ -133,27 +143,99 @@ static int libdax_audioxtr_identify(struct libdax_audioxtr *o, int flag)
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return(0);
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strcpy(o->fmt,".wav");
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o->wav_num_channels= libdax_audioxtr_to_int(o,(unsigned char *) buf+22,2,0);
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o->wav_sample_rate= libdax_audioxtr_to_int(o,(unsigned char *) buf+24,4,0);
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o->wav_bits_per_sample= libdax_audioxtr_to_int(o,(unsigned char *)buf+34,2,0);
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o->msb_first= 0;
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o->num_channels= libdax_audioxtr_to_int(o,(unsigned char *) buf+22,2,0);
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o->sample_rate= libdax_audioxtr_to_int(o,(unsigned char *) buf+24,4,0);
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o->bits_per_sample= libdax_audioxtr_to_int(o,(unsigned char *)buf+34,2,0);
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sprintf(o->fmt_info,
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".wav , num_channels=%d , sample_rate=%d , bits_per_sample=%d",
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o->wav_num_channels,o->wav_sample_rate,o->wav_bits_per_sample);
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o->num_channels,o->sample_rate,o->bits_per_sample);
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o->wav_subchunk2_size= libdax_audioxtr_to_int(o,(unsigned char *)buf+40,4,0);
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o->data_size= o->wav_subchunk2_size;
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return(1);
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}
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static int libdax_audioxtr_identify_au(struct libdax_audioxtr *o, int flag)
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{
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int ret,encoding;
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char buf[24];
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/* Check wether this is a Sun Audio, .au file */
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/* info used: http://ccrma.stanford.edu/courses/422/projects/WaveFormat/ */
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if(o->fd!=0) {
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ret= lseek(o->fd,0,SEEK_SET);
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if(ret==-1)
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return(0);
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}
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ret= read(o->fd, buf, 24);
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if(ret<24)
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return(0);
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if(strncmp(buf,".snd",4)!=0)
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return(0);
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strcpy(o->fmt,".au");
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o->msb_first= 1;
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o->au_data_location= libdax_audioxtr_to_int(o,(unsigned char *)buf+4,4,1);
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o->au_data_size= libdax_audioxtr_to_int(o,(unsigned char *)buf+8,4,1);
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encoding= libdax_audioxtr_to_int(o,(unsigned char *)buf+12,4,1);
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if(encoding==2)
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o->bits_per_sample= 8;
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else if(encoding==3)
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o->bits_per_sample= 16;
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else if(encoding==4)
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o->bits_per_sample= 24;
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else if(encoding==5)
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o->bits_per_sample= 32;
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else
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o->bits_per_sample= -encoding;
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o->sample_rate= libdax_audioxtr_to_int(o,(unsigned char *)buf+16,4,1);
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o->num_channels= libdax_audioxtr_to_int(o,(unsigned char *)buf+20,4,1);
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if(o->au_data_size!=0xffffffff)
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o->data_size= o->au_data_size;
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else
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o->data_size= 0;
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sprintf(o->fmt_info,
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".au , num_channels=%d , sample_rate=%d , bits_per_sample=%d",
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o->num_channels,o->sample_rate,o->bits_per_sample);
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/* <<< for testing only */;
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return(1);
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return(o->bits_per_sample>0); /* Audio format must be linear PCM */
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}
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static int libdax_audioxtr_identify(struct libdax_audioxtr *o, int flag)
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{
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int ret;
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ret= libdax_audioxtr_identify_wav(o, 0);
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if(ret!=0)
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return(ret);
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if(o->fd==0) /* cannot rewind stdin */
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return(0);
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ret= libdax_audioxtr_identify_au(o, 0);
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if(ret!=0)
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return(ret);
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return(0);
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}
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/* @param flag bit0=msb_first */
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static unsigned libdax_audioxtr_to_int(struct libdax_audioxtr *o,
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unsigned char *bytes, int len, int flag)
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{
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unsigned int ret= 0;
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int i;
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for(i= len-1; i>=0; i--)
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ret= ret*256+bytes[i];
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if(flag&1)
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for(i= 0; i<len; i++)
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ret= ret*256+bytes[i];
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else
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for(i= len-1; i>=0; i--)
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ret= ret*256+bytes[i];
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return(ret);
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}
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@ -162,12 +244,18 @@ static int libdax_audioxtr_init_reading(struct libdax_audioxtr *o, int flag)
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{
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int ret;
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/* currently this only works for MS WAVE files .wav */;
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/* currently this only works for MS WAVE files .wav and Sun .au*/;
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if(o->fd==0) /* stdin: hope no read came after libdax_audioxtr_identify() */
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return(1);
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o->extract_count= 0;
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ret= lseek(o->fd,44,SEEK_SET);
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if(strcmp(o->fmt,".wav")==0)
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ret= lseek(o->fd,44,SEEK_SET);
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else if(strcmp(o->fmt,".au")==0)
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ret= lseek(o->fd,o->au_data_location,SEEK_SET);
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else
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ret= -1;
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if(ret==-1)
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return(0);
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@ -178,28 +266,22 @@ static int libdax_audioxtr_init_reading(struct libdax_audioxtr *o, int flag)
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int libdax_audioxtr_get_id(struct libdax_audioxtr *o,
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char **fmt, char **fmt_info,
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int *num_channels, int *sample_rate, int *bits_per_sample,
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int flag)
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int *msb_first, int flag)
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{
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*fmt= o->fmt;
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*fmt_info= o->fmt_info;
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if(strcmp(o->fmt,".wav")==0) {
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*num_channels= o->wav_num_channels;
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*sample_rate= o->wav_sample_rate;
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*bits_per_sample= o->wav_bits_per_sample;
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} else
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*num_channels= *sample_rate= *bits_per_sample= 0;
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*num_channels= o->num_channels;
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*sample_rate= o->sample_rate;
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*bits_per_sample= o->bits_per_sample;
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*msb_first= o->msb_first;
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return(1);
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}
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int libdax_audioxtr_get_size(struct libdax_audioxtr *o, off_t *size, int flag)
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{
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if(strcmp(o->fmt,".wav")==0) {
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*size= o->wav_subchunk2_size;
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return(1);
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}
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*size= 0;
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return(0);
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*size= o->data_size;
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return(1);
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}
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@ -226,7 +308,7 @@ int libdax_audioxtr_detach_fd(struct libdax_audioxtr *o, int *fd, int flag)
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{
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if(o->fd<0)
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return(-1);
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if(strcmp(o->fmt,".wav")!=0)
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if(strcmp(o->fmt,".wav")!=0 && strcmp(o->fmt,".au")!=0)
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return(0);
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if(flag&1) {
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*fd= o->fd;
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@ -46,18 +46,19 @@ int libdax_audioxtr_new(struct libdax_audioxtr **xtr, char *path, int flag);
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/** Obtain identification parameters of opened audio source.
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@param xtr Opaque handle to extractor
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@param fmt Gets pointed to the audio file format id text: ".wav"
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@param fmt Gets pointed to the audio file format id text: ".wav" , ".au"
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@param fmt_info Gets pointed to a format info text telling parameters
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@param num_channels e.g. 1=mono, 2=stereo, etc
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@param sample_rate e.g. 11025, 44100
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@param bits_per_sample e.g. 8= 8 bits per sample, 16= 16 bits ...
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@param msb_first Byte order of samples: 0=Intel 1=Motorola
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@param flag Bitfield for control purposes (unused yet, submit 0)
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@return >0 success, <=0 failure
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*/
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int libdax_audioxtr_get_id(struct libdax_audioxtr *xtr,
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char **fmt, char **fmt_info,
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int *num_channels, int *sample_rate,
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int *bits_per_sample, int flag);
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int *bits_per_sample, int *msb_first, int flag);
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/** Obtain a prediction about the extracted size based on internal information
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@ -136,7 +137,7 @@ struct libdax_audioxtr {
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/* Source of the encoded audio data */
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char path[LIBDAX_AUDIOXTR_STRLEN];
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/* File descriptor to path */
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/* File descriptor to path. Anything else than 0 must be lseek-able */
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int fd;
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/* Format identifier. E.g. ".wav" */
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@ -145,6 +146,18 @@ struct libdax_audioxtr {
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/* Format parameter info text */
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char fmt_info[LIBDAX_AUDIOXTR_STRLEN];
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/* 1= mono, 2= stereo, etc. */
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int num_channels;
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/* 8000, 44100, etc. */
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int sample_rate;
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/* 8 bits = 8, 16 bits = 16, etc. */
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int bits_per_sample;
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/* Byte order of samples: 0=Intel 1=Motorola */
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int msb_first;
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/* Number of bytes to extract (0= unknown/unlimited) */
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off_t data_size;
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@ -157,19 +170,20 @@ struct libdax_audioxtr {
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/* MS WAVE Format */
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/* info used: http://ccrma.stanford.edu/courses/422/projects/WaveFormat/ */
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/* 1= mono, 2= stereo, etc. */
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int wav_num_channels;
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/* 8000, 44100, etc. */
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int wav_sample_rate;
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/* 8 bits = 8, 16 bits = 16, etc. */
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int wav_bits_per_sample;
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/* == NumSamples * NumChannels * BitsPerSample/8
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This is the number of bytes in the data. */
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unsigned wav_subchunk2_size;
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/* Sun Audio, .au */
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/* info used: http://www.opengroup.org/public/pubs/external/auformat.html */
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/* Number of bytes in non-payload header part */
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unsigned au_data_location;
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/* Number of payload bytes or 0xffffffff */
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unsigned au_data_size;
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};
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@ -186,8 +200,15 @@ static int libdax_audioxtr_open(struct libdax_audioxtr *o, int flag);
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*/
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static int libdax_audioxtr_identify(struct libdax_audioxtr *o, int flag);
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/** Specialized identifier for .wav */
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static int libdax_audioxtr_identify_wav(struct libdax_audioxtr *o, int flag);
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/** Specialized identifier for .au */
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static int libdax_audioxtr_identify_au(struct libdax_audioxtr *o, int flag);
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/** Convert a byte string into a number (currently only little endian)
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@param flag Bitfield for control purposes
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bit0=msb_first
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@return The resulting number
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*/
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static unsigned libdax_audioxtr_to_int(struct libdax_audioxtr *o,
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@ -53,7 +53,7 @@ int main(int argc, char **argv)
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/* Inquired source parameters */
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char *fmt, *fmt_info;
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int num_channels, sample_rate, bits_per_sample;
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int num_channels, sample_rate, bits_per_sample, msb_first;
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off_t data_size;
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/* Auxiliary variables */
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@ -142,7 +142,7 @@ help:;
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}
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/* Obtain and print parameters of audio source */
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libdax_audioxtr_get_id(xtr, &fmt, &fmt_info,
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&num_channels, &sample_rate, &bits_per_sample, 0);
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&num_channels, &sample_rate, &bits_per_sample, &msb_first, 0);
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fprintf(stderr, "Detected format: %s\n", fmt_info);
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libdax_audioxtr_get_size(xtr, &data_size, 0);
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fprintf(stderr, "Data size : %.f bytes\n", (double) data_size);
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