Implemented some cdrecord pickiness for .wav extraction

cdrskin/cdrskin.c

@@ -749,8 +749,9 @@ struct CdrfifO {
 /* --------------------------------------------------------------------- */
 
 /** cdrecord pads up to 600 kB in any case. 
-    libburn yields blank result on tracks <~ 600 kB */
+    libburn yields blank result on tracks <~ 600 kB
-static double Cdrtrack_minimum_sizE= 600*1024;
+    cdrecord demands 300 sectors = 705600 bytes for -audio */
+static double Cdrtrack_minimum_sizE= 300;
 
 
 /** This structure represents a track resp. a data source */
@@ -906,12 +907,14 @@ int Cdrtrack_get_fifo(struct CdrtracK *track, struct CdrfifO **fifo, int flag)
 
 /** Try wether automatic audio extraction is appropriate and eventually open
     a file descriptor to the raw data.
-    @return -2 could not open track source, no use in retrying
+    @return -3 identified as .wav but with cdrecord-inappropriate parameters
+            -2 could not open track source, no use in retrying
             -1 severe error
              0 not appropriate to extract, burn plain file content
              1 to be extracted, *fd is a filedescriptor delivering raw data
 */
-int Cdrtrack_extract_audio(struct CdrtracK *track, int *fd, int flag)
+int Cdrtrack_extract_audio(struct CdrtracK *track, int *fd, off_t *xtr_size,
+                           int flag)
 {
  int l,ret;
 #ifdef Cdrskin_libburn_has_audioxtR
@@ -933,7 +936,7 @@ int Cdrtrack_extract_audio(struct CdrtracK *track, int *fd, int flag)
  if(track->track_type_by_default) {
    Cdrtrack_set_track_type(track,BURN_AUDIO,0);
    track->track_type_by_default= 2;
-   fprintf(stderr,"cdrskin: NOTE: Activated -audio for '%s'\n",
+   fprintf(stderr,"cdrskin: NOTE : Activated -audio for '%s'\n",
            track->source_path);
  }
 
@@ -944,14 +947,19 @@ int Cdrtrack_extract_audio(struct CdrtracK *track, int *fd, int flag)
    return(ret);
  libdax_audioxtr_get_id(xtr,&fmt,&fmt_info,
                         &num_channels,&sample_rate,&bits_per_sample,0);
- if((num_channels!=2) || sample_rate!=44100 || bits_per_sample!=16)
+ if(strcmp(fmt,".wav")!=0 || 
-   {ret= 0; goto ex;}
+    num_channels!=2 || sample_rate!=44100 || bits_per_sample!=16) {
+   fprintf(stderr,"cdrskin: ( %s )\n",fmt_info);
+   fprintf(stderr,"cdrskin: FATAL : Inappropriate audio coding in '%s'.\n",
+                  track->source_path);
+   {ret= -3; goto ex;}
+ }
+ libdax_audioxtr_get_size(xtr,xtr_size,0);
  ret= libdax_audioxtr_detach_fd(xtr,fd,0);
  if(ret<=0)
    {ret= -1*!!ret; goto ex;}
-
+ fprintf(stderr,"cdrskin: NOTE : %.f audio bytes in '%s'\n",
- fprintf(stderr,"cdrskin: NOTE: Will extract plain audio from '%s'\n",
+                (double) *xtr_size, track->source_path);
-         track->source_path);
  ret= 1;
 ex:
  libdax_audioxtr_destroy(&xtr,0);
@@ -971,6 +979,7 @@ ex:
 int Cdrtrack_open_source_path(struct CdrtracK *track, int *fd, int flag)
 {
  int is_wav= 0;
+ off_t xtr_size= 0;
 
  if(track->source_path[0]=='-' && track->source_path[1]==0)
    *fd= 0;
@@ -979,49 +988,46 @@ int Cdrtrack_open_source_path(struct CdrtracK *track, int *fd, int flag)
    *fd= atoi(track->source_path+1);
  else {
    *fd= -1;
-
+   is_wav= Cdrtrack_extract_audio(track,fd,&xtr_size,0);
-#define Try_auto_extract 1
+   if(is_wav==-1)
-#ifdef Try_auto_extract
-
-   is_wav= Cdrtrack_extract_audio(track,fd,0);
-   if(is_wav<0 && is_wav!=-2)
      return(-1);
+   if(is_wav==-3)
+     return(0);
    if(is_wav==0)
      *fd= open(track->source_path,O_RDONLY);
-
-#else /* Try_auto_extract */
-
-   if(*fd>=0)
-     close(*fd);
-   *fd= open(track->source_path,O_RDONLY);
-
-   is_wav= 0;
-
-   if(*fd>=0 && is_wav==1) {
-     char wav_head[44];
-     read(*fd, wav_head, 44);
-   }
-
-#endif /* ! Try_auto_extract */
-
    if(*fd==-1) {
      fprintf(stderr,"cdrskin: failed to open source address '%s'\n",
              track->source_path);
      fprintf(stderr,"cdrskin: errno=%d , \"%s\"\n",errno,
                     errno==0?"-no error code available-":strerror(errno));
-   } else {
+     return(0);
-     if(track->fixed_size<=0) { 
+   }
+   if(track->fixed_size<=0) {
+     if(xtr_size>0)
+       track->fixed_size= xtr_size;
+     else {
        struct stat stbuf;
        if(fstat(*fd,&stbuf)!=-1)
-         track->fixed_size= stbuf.st_size-(44*(is_wav==1));
+         track->fixed_size= stbuf.st_size;
      }
    }
  }
- if(track->fixed_size<Cdrtrack_minimum_sizE && *fd>=0) {
+
-   fprintf(stderr,
+ if(track->fixed_size < Cdrtrack_minimum_sizE * track->sector_size) {
-           "cdrskin: NOTE : Enforcing minimum track size of %.f bytes\n",
+   if(track->track_type == BURN_AUDIO) {
-           Cdrtrack_minimum_sizE);
+     /* >>> cdrecord: We differ in automatic padding with audio:
-   track->fixed_size= Cdrtrack_minimum_sizE;
+       Audio tracks must be at least 705600 bytes and a multiple of 2352.
+     */
+     fprintf(stderr,
+             "cdrskin: FATAL : Audio tracks must be at least %.f bytes\n",
+             Cdrtrack_minimum_sizE*track->sector_size);
+     return(0);
+   } else {
+     fprintf(stderr,
+             "cdrskin: NOTE : Enforcing minimum track size of %.f bytes\n",
+             Cdrtrack_minimum_sizE*track->sector_size);
+     track->fixed_size= Cdrtrack_minimum_sizE*track->sector_size;
+  }
  }
  track->source_fd= *fd;
  return(*fd>=0);

cdrskin/cdrskin_timestamp.h

@@ -1 +1 @@
-#define Cdrskin_timestamP "2006.10.17.141053"
+#define Cdrskin_timestamP "2006.10.17.164140"

libburn/libdax_audioxtr.c

@@ -38,10 +38,13 @@ int libdax_audioxtr_new(struct libdax_audioxtr **xtr, char *path, int flag)
  o->fd= -1;
  strcpy(o->fmt,"unidentified");
  o->fmt_info[0]= 0;
+ o->data_size= 0;
+ o->extract_count= 0;
 
  o->wav_num_channels= 0;
  o->wav_sample_rate= 0;
  o->wav_bits_per_sample= 0;
+ o->wav_subchunk2_size= 0;
 
  ret= libdax_audioxtr_open(o,0);
  if(ret<=0)
@@ -136,6 +139,8 @@ static int libdax_audioxtr_identify(struct libdax_audioxtr *o, int flag)
  sprintf(o->fmt_info,
          ".wav , num_channels=%d , sample_rate=%d , bits_per_sample=%d",
          o->wav_num_channels,o->wav_sample_rate,o->wav_bits_per_sample);
+ o->wav_subchunk2_size= libdax_audioxtr_to_int(o,(unsigned char *)buf+40,4,0);
+ o->data_size= o->wav_subchunk2_size;
 
  return(1);
 }
@@ -161,6 +166,7 @@ static int libdax_audioxtr_init_reading(struct libdax_audioxtr *o, int flag)
  if(o->fd==0) /* stdin: hope no read came after libdax_audioxtr_identify() */
    return(1);
 
+ o->extract_count= 0;
  ret= lseek(o->fd,44,SEEK_SET);
  if(ret==-1)
    return(0);
@@ -186,6 +192,17 @@ int libdax_audioxtr_get_id(struct libdax_audioxtr *o,
 }
 
 
+int libdax_audioxtr_get_size(struct libdax_audioxtr *o, off_t *size, int flag)
+{
+ if(strcmp(o->fmt,".wav")==0) {
+   *size= o->wav_subchunk2_size;
+   return(1);
+ }
+ *size= 0;
+ return(0);
+}
+
+
 int libdax_audioxtr_read(struct libdax_audioxtr *o,
                          char buffer[], int buffer_size, int flag)
 {
@@ -193,7 +210,14 @@ int libdax_audioxtr_read(struct libdax_audioxtr *o,
 
  if(buffer_size<=0 || o->fd<0)
    return(-2);
+ if(o->data_size>0 && !(flag&1))
+   if(buffer_size > o->data_size - o->extract_count)
+     buffer_size= o->data_size - o->extract_count;
+ if(buffer_size<=0)
+   return(0);
  ret= read(o->fd,buffer,buffer_size);
+ if(ret>0)
+   o->extract_count+= ret;
  return(ret);
 }
 

libburn/libdax_audioxtr.h

@@ -60,12 +60,23 @@ int libdax_audioxtr_get_id(struct libdax_audioxtr *xtr,
                            int *bits_per_sample, int flag);
 
 
+/** Obtain a prediction about the extracted size based on internal information
+    of the formatted file.
+    @param xtr Opaque handle to extractor
+    @param size Gets filled with the predicted size
+    @param flag Bitfield for control purposes (unused yet, submit 0)
+    @return 1 prediction was possible , 0 no prediction could be made
+*/
+int libdax_audioxtr_get_size(struct libdax_audioxtr *o, off_t *size, int flag);
+
+
 /** Obtain next buffer full of extracted data in desired format (only raw audio
     for now).
     @param xtr Opaque handle to extractor
     @param buffer Gets filled with extracted data
     @param buffer_size Maximum number of bytes to be filled into buffer
-    @param flag Bitfield for control purposes (unused yet, submit 0)
+    @param flag Bitfield for control purposes
+                bit0= do not stop at predicted end of data
     @return >0 number of valid buffer bytes,
              0 End of file
             -1 operating system reports error
@@ -134,6 +145,12 @@ struct libdax_audioxtr {
  /* Format parameter info text */
  char fmt_info[LIBDAX_AUDIOXTR_STRLEN];
 
+ /* Number of bytes to extract (0= unknown/unlimited) */
+ off_t data_size;
+
+ /* Number of extracted data bytes */
+ off_t extract_count;
+
 
  /* Format dependent parameters */
 
@@ -149,6 +166,10 @@ struct libdax_audioxtr {
  /* 8 bits = 8, 16 bits = 16, etc. */
  int wav_bits_per_sample;
 
+ /* == NumSamples * NumChannels * BitsPerSample/8
+    This is the number of bytes in the data. */
+ unsigned wav_subchunk2_size;
+
 };
 
 

test/dewav.c

@@ -54,9 +54,10 @@ int main(int argc, char **argv)
  /* Inquired source parameters */
  char *fmt, *fmt_info;
  int num_channels, sample_rate, bits_per_sample;
+ off_t data_size;
 
  /* Auxiliary variables */
- int ret, i, be_strict= 1, buf_count, detach_fd= 0;
+ int ret, i, be_strict= 1, buf_count, detach_fd= 0, extract_all= 0;
  char buf[2048];
 
  if(argc < 2)
@@ -75,8 +76,11 @@ int main(int argc, char **argv)
    } else if(strcmp(argv[i],"--strict")==0) {
      be_strict= 1;
    } else if(strcmp(argv[i],"--detach_fd")==0) {
-     /* Test the dirty detach method */
+     /* Test the dirty detach method. Always --extract_all  */
      detach_fd= 1;
+   } else if(strcmp(argv[i],"--extract_all")==0) {
+     /* Dirty : read all available bytes regardless of data_size  */
+     extract_all= 1;
    } else if(strcmp(argv[i],"--help")==0) {
 help:;
      fprintf(stderr,
@@ -140,7 +144,10 @@ help:;
  libdax_audioxtr_get_id(xtr, &fmt, &fmt_info,
                         &num_channels, &sample_rate, &bits_per_sample, 0);
  fprintf(stderr, "Detected format: %s\n", fmt_info);
- if(num_channels!=2 || sample_rate!=44100 || bits_per_sample!=16) {
+ libdax_audioxtr_get_size(xtr, &data_size, 0);
+ fprintf(stderr, "Data size      : %.f bytes\n", (double) data_size);
+ if(strcmp(fmt,".wav")!=0 ||
+    num_channels!=2 || sample_rate!=44100 || bits_per_sample!=16) {
    fprintf(stderr,
          "%sAudio source parameters do not comply to cdrskin/README specs\n",
          (be_strict ? "" : "WARNING: "));
@@ -162,14 +169,13 @@ help:;
 
  /* Extract and put out raw audio data */;
  while(1) {
-
    if(detach_fd) {
      buf_count= read(xtr_fd, buf, sizeof(buf));
      if(buf_count==-1)
        fprintf(stderr,"Error while reading from detached fd\n(%d) '%s'\n",
                       errno, strerror(errno));
    } else {
-     buf_count= libdax_audioxtr_read(xtr, buf, sizeof(buf), 0);
+     buf_count= libdax_audioxtr_read(xtr, buf, sizeof(buf), !!extract_all);
    }
    if(buf_count < 0)
      exit(7);