cosmetics: spelling/grammar in README and lib headers

Change-Id: Ib8648adf652d29dd38887e5e07b09b4aa3965c6e

README

@@ -32,9 +32,9 @@ By running:
 
   nmake /f Makefile.vc CFG=release-static RTLIBCFG=static OBJDIR=output
 
-the directory output\release-static\x86\bin will contain the tools
-cweb.exe and dweb.exe. The directory output\release-static\x86\lib will
-contains the libwebp static library.
+the directory output\release-static\(x64|x86)\bin will contain the tools
+cwebp.exe and dwebp.exe. The directory output\release-static\(x64|x86)\lib will
+contain the libwebp static library.
 
 Unix build using makefile.unix:
 -------------------------------
@@ -170,7 +170,7 @@ visual quality are:
  -m
 
 Namely:
-  * 'preset' will set up a default encoding configuration targetting a
+  * 'preset' will set up a default encoding configuration targeting a
      particular type of input. It should appear first in the list of options,
      so that subsequent options can take effect on top of this preset.
      Default value is 'default'.
@@ -262,7 +262,7 @@ The encoding flow looks like:
   // ... additional tuning
   config.sns_strength = 90;
   config.filter_sharpness = 6;
-  config_error = WebPValidateConfig(&config);  // not mandartory, but useful
+  config_error = WebPValidateConfig(&config);  // not mandatory, but useful
 
   // Setup the input data
   WebPPicture pic;
@@ -290,7 +290,7 @@ The encoding flow looks like:
   // initialize 'wrt' here...
 
   // Compress!
-  int ok = WebPEncode(&config, &pic);   // ok = 0 => error occured!
+  int ok = WebPEncode(&config, &pic);   // ok = 0 => error occurred!
   WebPPictureFree(&pic);  // must be called independently of the 'ok' result.
 
   // output data should have been handled by the writer at that point.
@@ -308,9 +308,9 @@ uint8_t* WebPDecodeRGB(const uint8_t* data, uint32_t data_size,
                        int *width, int *height);
 
 Please have a look at the file src/webp/decode.h for the details.
-There are variants for decoding in BGR/RGBA/BGRA order, along with decoding to
-raw Y'CbCr samples. One can also decode the image directly into a pre-allocated
-buffer.
+There are variants for decoding in BGR/RGBA/ARGB/BGRA order, along with
+decoding to raw Y'CbCr samples. One can also decode the image directly into a
+pre-allocated buffer.
 
 To detect a WebP file and gather picture's dimensions, the function:
   int WebPGetInfo(const uint8_t* data, uint32_t data_size,
@@ -343,7 +343,7 @@ or by just mentioning the new size of the transmitted data:
   WebPIUpdate(idec, buffer, size_of_transmitted_buffer);
 
 Note that 'buffer' can be modified between each calls to WebPIUpdate, in
-particular when the buffer is resized to accomodate larger data.
+particular when the buffer is resized to accommodate larger data.
 
 These functions will return the decoding status: either VP8_STATUS_SUSPENDED if
 decoding is not finished yet, or VP8_STATUS_OK when decoding is done.
@@ -374,3 +374,4 @@ Discuss:
 ========
 
 Email: webp-discuss@webmproject.org
+Web: http://groups.google.com/a/webmproject.org/group/webp-discuss

src/webp/decode.h

@@ -234,7 +234,7 @@ WEBP_EXTERN(WebPIDecoder*) WebPINewYUV(
     uint8_t* u, int u_size, int u_stride,
     uint8_t* v, int v_size, int v_stride);
 
-// Deletes the WebpBuffer object and associated memory. Must always be called
+// Deletes the WebPIDecoder object and associated memory. Must always be called
 // if WebPINew, WebPINewRGB or WebPINewYUV succeeded.
 WEBP_EXTERN(void) WebPIDelete(WebPIDecoder* const idec);
 
@@ -329,7 +329,7 @@ WEBP_EXTERN(VP8StatusCode) WebPGetFeaturesInternal(
     const uint8_t*, uint32_t, WebPBitstreamFeatures* const, int);
 
 // Retrieve features from the bitstream. The *features structure is filled
-// with informations gathered from the bitstream.
+// with information gathered from the bitstream.
 // Returns false in case of error or version mismatch.
 // In case of error, features->bitstream_status will reflect the error code.
 static inline

src/webp/decode_vp8.h

@@ -21,7 +21,7 @@ extern "C" {
 //-----------------------------------------------------------------------------
 // Lower-level API
 //
-// Thes functions provide fine-grained control of the decoding process.
+// These functions provide fine-grained control of the decoding process.
 // The call flow should resemble:
 //
 //   VP8Io io;
@@ -105,7 +105,7 @@ WEBP_EXTERN(int) VP8InitIoInternal(VP8Io* const, int);
 
 // Set the custom IO function pointers and user-data. The setter for IO hooks
 // should be called before initiating incremental decoding. Returns true if
-// WebPIdecoder object is successfully modified, false otherwise.
+// WebPIDecoder object is successfully modified, false otherwise.
 WEBP_EXTERN(int) WebPISetIOHooks(WebPIDecoder* const idec,
                                  VP8IoPutHook put,
                                  VP8IoSetupHook setup,

src/webp/encode.h

@@ -113,14 +113,14 @@ WEBP_EXTERN(int) WebPValidateConfig(const WebPConfig* const config);
 
 typedef struct WebPPicture WebPPicture;   // main structure for I/O
 
-// non-essential structure for storing auxilliary statistics
+// non-essential structure for storing auxiliary statistics
 typedef struct {
   float PSNR[4];          // peak-signal-to-noise ratio for Y/U/V/All
   int coded_size;         // final size
   int block_count[3];     // number of intra4/intra16/skipped macroblocks
-  int header_bytes[2];    // approximative number of bytes spent for header
+  int header_bytes[2];    // approximate number of bytes spent for header
                           // and mode-partition #0
-  int residual_bytes[3][4];  // approximative number of bytes spent for
+  int residual_bytes[3][4];  // approximate number of bytes spent for
                              // DC/AC/uv coefficients for each (0..3) segments.
   int segment_size[4];    // number of macroblocks in each segments
   int segment_quant[4];   // quantizer values for each segments
@@ -256,7 +256,7 @@ WEBP_EXTERN(int) WebPPictureImportBGRA(
 //-----------------------------------------------------------------------------
 // Main call
 
-// Main encoding call, after config and picture have been initialiazed.
+// Main encoding call, after config and picture have been initialized.
 // 'picture' must be less than 16384x16384 in dimension, and the 'config' object
 // must be a valid one.
 // Returns false in case of error, true otherwise.