Fix typos in source code comments (#101)

Author: rex4539

doc/dist10-text/common.txt

@@ -54,7 +54,7 @@
  * 7/27/92 Mike Li               (re-)Port to MS-DOS                  *
  * 8/19/92 Soren H. Nielsen     Fixed bug in I_CRC_calc and in        *
  *                              II_CRC_calc.  Added function: new_ext *
- *                              for better MS-DOS compatability       *
+ *                              for better MS-DOS compatibility       *
  * 3/10/93 Kevin Peterson       changed aiff_read_headers to handle   *
  *                              chunks in any order.  now returns     *
  *                              position of sound data in file.       *

doc/vbr.txt

@@ -213,7 +213,7 @@ How CBR works
       subband
  - Keep increasing the bits to whichever subband currently has the min MNR
       value until we have no bits left.
- - This mode does not guarentee that all the subbands are without noise
+ - This mode does not guarantee that all the subbands are without noise
       ie there may still be subbands with MNR less than  0.0  (noisy!)
 
 How VBR works

libtwolame/ath.c

@@ -38,12 +38,12 @@ FLOAT twolame_ath_db(FLOAT f, FLOAT value)
 
 
        In the past LAME was using the Painter &Spanias formula. But we had some recurrent problems
-       with HF content. We measured real ATH values, and found the older formula to be inacurate in
+       with HF content. We measured real ATH values, and found the older formula to be inaccurate in
        the higher part. So we made this new formula and this solved most of HF problematic
        testcases. The tradeoff is that in VBR mode it increases a lot the bitrate. */
 
 
-    /* this curve can be udjusted according to the VBR scale: it adjusts from something close to
+    /* this curve can be adjusted according to the VBR scale: it adjusts from something close to
        Painter & Spanias on V9 up to Bouvigne's formula for V0. This way the VBR bitrate is more
        balanced according to the -V value. */
 
@@ -76,7 +76,7 @@ FLOAT twolame_ath_energy(FLOAT freq, FLOAT value)
     /* The values in the standard, and from the ATH formula are in dB. In the psycho model we are
        working in the energy domain. Hence the values that are in the absthr_X tables are not in
        dB. This function converts from dB into the energy domain. As noted on the LAME mailing list
-       from years ago (MFC FIX find the reference), the absolute threhsold of hearing values in the
+       from years ago (MFC FIX find the reference), the absolute threshold of hearing values in the
        tables in the standard are dodgy - the ATH in the tables do not correspond to any previously
        known values of the ATH. From ISO 11172 Tables D.4.x "A value of 0dB represents a level in
        the absolute threshold calculation of 96dB below the energy of a sine wave of amplitude

libtwolame/encode.c

@@ -809,7 +809,7 @@ int twolame_init_bit_allocation(twolame_options * glopts)
        outside these ranges, otherwise a new alloc table would have to be loaded in the middle of
        encoding. This VBR hack is dodgy - the standard says that LayerII decoders don't have to
        support a variable bitrate, but Layer3 decoders must do so. Hence, it is unlikely that a
-       compliant layer2 decoder would be written to dynmically change allocation tables. *BUT* a
+       compliant layer2 decoder would be written to dynamically change allocation tables. *BUT* a
        layer3 encoder might handle it by default, meaning we could switch tables mid-encode and
        enjoy a wider range of bitrates for the VBR encoding. None of this needs to be done for LSF,
        since there is only *one* possible alloc table in LSF MFC Feb 2003 */
@@ -1027,7 +1027,7 @@ static void vbr_maxmnr(FLOAT mnr[2][SBLIMIT], char used[2][SBLIMIT], int sblimit
 MFC Feb 2003
 vbr_bit_allocation is different to the normal a_bit_allocation in that
 it is known beforehand that there are definitely enough bits to do what we
-have to - i.e. a bitrate was specificially chosen in main_bit_allocation so
+have to - i.e. a bitrate was specifically chosen in main_bit_allocation so
 that we have enough bits to encode what we have to.
 This function should take that into account and just greedily assign
 the bits, rather than fussing over the minimum MNR subband - we know

libtwolame/psycho_1.c

@@ -130,7 +130,7 @@ static inline FLOAT add_db(psycho_1_mem * mem, FLOAT a, FLOAT b)
 {
     /* MFC - if the difference between a and b is large (>99), then just return the largest one.
        (about 10% of the time) - For differences between 0 and 99, return the largest value, but
-       add in a pre-calculated difference value. - the value 99 was chosen arbitarily. - maximum
+       add in a pre-calculated difference value. - the value 99 was chosen arbitrarily. - maximum
        (a-b) i've seen is 572 */
     FLOAT fdiff;
     int idiff;
@@ -171,7 +171,7 @@ static void psycho_1_hann_fft_pickmax(FLOAT sample[FFT_SIZE], mask power[HAN_SIZ
 
     if (!init) {
         /* calculate window function for the Fourier transform */
-        /* These values need only be initiliased once, regardless of the caller */
+        /* These values need only be initialised once, regardless of the caller */
         sqrt_8_over_3 = pow(8.0 / 3.0, 0.5);
         for (i = 0; i < FFT_SIZE; i++) {
             /* Hann window formula */

libtwolame/psycho_3.c

@@ -44,7 +44,7 @@ static inline FLOAT psycho_3_add_db(psycho_3_mem * mem, FLOAT a, FLOAT b)
 {
     /* MFC - if the difference between a and b is large (>99), then just return the largest one.
        (about 10% of the time) - For differences between 0 and 99, return the largest value, but
-       add in a pre-calculated difference value. - the value 99 was chosen arbitarily. - maximum
+       add in a pre-calculated difference value. - the value 99 was chosen arbitrarily. - maximum
        (a-b) i've seen is 572 */
     FLOAT fdiff;
     int idiff;
@@ -358,7 +358,7 @@ static void psycho_3_threshold(psycho_3_mem * mem, FLOAT * LTg, int *tonelabel,
         }
     }
 
-    /* ISO11172 D.1 Step 7 Calculate the global masking threhold */
+    /* ISO11172 D.1 Step 7 Calculate the global masking threshold */
     for (i = 0; i < SUBSIZE; i++) {
         LTg[i] = psycho_3_add_db(mem, LTnm[i], LTtm[i]);
         if (bit_rate < 96)
@@ -456,7 +456,7 @@ static psycho_3_mem *twolame_psycho_3_init(twolame_options * glopts)
         cbandindex[cbands] = 513;   /* Set the top of the last critical band */
         mem->cbands = cbands;   // make a not of the number of cbands
 
-        /* For each crtical band calculate the average bark value cbval [central bark value] */
+        /* For each critical band calculate the average bark value cbval [central bark value] */
         for (i = 1; i < HBLKSIZE; i++)
             cbval[partition[i]] += bark[i]; /* sum up all the bark values */
         for (i = 1; i < CBANDS; i++) {

libtwolame/psycho_n1.c

@@ -32,7 +32,7 @@
 
 /* a bunch of SNR values I sort of made up    MFC 1 oct 99
    Found by averaging the SNR values over a sound file
-   FIXME: Do a more rigourous investigation MFC Feb 2003 */
+   FIXME: Do a more rigorous investigation MFC Feb 2003 */
 
 // From Castanets.wav
 static const FLOAT snrdef[32] = {

libtwolame/twolame.c

@@ -164,7 +164,7 @@ static int init_header_info(twolame_options * glopts)
             return -1;
         }
     }
-    // Copy accross the other settings
+    // Copy across the other settings
     header->padding = 0; /* when requested, padding will be evaluated later for this frame */
     header->private_extension = glopts->private_extension;
     header->mode = glopts->mode;
@@ -389,7 +389,7 @@ int twolame_init_params(twolame_options * glopts)
         return -1;
     }
 
-    // Initialise interal variables
+    // Initialise internal variables
     glopts->samples_in_buffer = 0;
     glopts->psycount = 0;
 
@@ -424,7 +424,7 @@ int twolame_init_params(twolame_options * glopts)
     if (twolame_init_subband(&glopts->smem) < 0) {
         return -1;
     }
-    // All initalised now :)
+    // All initialised now :)
     glopts->twolame_init++;
 
     return (0);
@@ -638,7 +638,7 @@ static int encode_frame(twolame_options * glopts, bit_stream * bs)
         buffer_put1bit(bs, 0);
 
 
-    // Calulate the number of bits in this frame
+    // Calculate the number of bits in this frame
     frameBits = twolame_buffer_sstell(bs) - initial_bits;
     if (frameBits % 8) {        /* a program failure */
         fprintf(stderr, "Sent %ld bits = %ld slots plus %ld\n", frameBits, frameBits / 8,

libtwolame/twolame.h

@@ -150,7 +150,7 @@ TL_API const char *get_twolame_url(void);
 /** Print the library version and
  *  encoder parameter settings to STDERR.
  *
- *  Will display differnent ammounts of information
+ *  Will display different amounts of information
  *  depending on the verbosity setting.
  *  If verbosity is set to 0 then no message will be displayed.
  *
@@ -188,7 +188,7 @@ TL_API int twolame_init_params(twolame_options * glopts);
 
 /** Encode some 16-bit PCM audio to MP2.
  *
- *  Takes 16-bit PCM audio samples from seperate left and right
+ *  Takes 16-bit PCM audio samples from separate left and right
  *  buffers and places encoded audio into mp2buffer.
  *
  *  \param glopts          twolame options pointer
@@ -228,7 +228,7 @@ TL_API int twolame_encode_buffer_interleaved(twolame_options * glopts,
 
 /** Encode some 32-bit PCM audio to MP2.
  *
- *  Takes 32-bit floating point PCM audio samples from seperate
+ *  Takes 32-bit floating point PCM audio samples from separate
  *  left and right buffers and places encoded audio into mp2buffer.
  *
  *  Note: the 32-bit samples are currently scaled down to
@@ -378,7 +378,7 @@ TL_API TWOLAME_MPEG_version twolame_get_version(twolame_options * glopts);
 TL_API const char *twolame_get_version_name(twolame_options * glopts);
 
 
-/** Set the freeformat strem mode.
+/** Set the freeformat stream mode.
  *
  *  \param glopts          pointer to twolame options pointer
  *  \param freef           freeformat mode ( TRUE / FALSE )
@@ -689,7 +689,7 @@ TL_API int twolame_get_error_protection(twolame_options * glopts);
 TL_API int twolame_set_copyright(twolame_options * glopts, int copyright);
 
 
-/** Get the copright flag state
+/** Get the copyright flag state
  *
  *  \param glopts          pointer to twolame options pointer
  *  \return                state of the copyright flag (TRUE/FALSE)

libtwolame/util.c

@@ -31,7 +31,7 @@
 #include "util.h"
 
 
-// Return string containg version number
+// Return string containing version number
 // of this library
 const char *get_twolame_version(void)
 {
@@ -40,7 +40,7 @@ const char *get_twolame_version(void)
     return str;
 }
 
-// Return string containg version number
+// Return string containing version number
 // of this library
 const char *get_twolame_url(void)
 {
@@ -157,7 +157,7 @@ int twolame_get_framelength(twolame_options * glopts)
 }
 
 
-// Get the bitrate corrensponding to a given index
+// Get the bitrate corresponding to a given index
 int twolame_index_bitrate(int mpeg_ver, int index)
 {
     if (index>0 && index<15) {