This patch complements wave_save_parts and the alaw support.

It allows one to save raw data in alaw format using the same interface

than the one provided in wave_save_parts.

This patch depends on wave_save_parts.diff and the alaw patches to 

provide asterisk support.

No copyright subsists in this patch as it is too trivial.

Author: Sergio Oller <sergioller@gmail.com>

--- a/speech_class/EST_WaveFile.cc

+++ b/speech_class/EST_WaveFile.cc

@@ -477,6 +477,24 @@ EST_read_status EST_WaveFile::load_alaw(

     offset, length);

 }

+EST_write_status EST_WaveFile::save_alaw_header(FILE *fp,

+					 const EST_Wave &wv,

+					 EST_sample_type_t stype, int bo)

+{

+    EST_Wave localwv = wv;

+    localwv.resample(8000);

+    return save_header_using(save_wave_alaw_header, fp, localwv, stype, bo);

+}

+

+EST_write_status EST_WaveFile::save_alaw_data(FILE *fp,

+					 const EST_Wave &wv,

+					 EST_sample_type_t stype, int bo)

+{

+    EST_Wave localwv = wv;

+    localwv.resample(8000);

+    return save_using(save_wave_alaw_data, fp, localwv, stype, bo);

+}

+

 EST_write_status EST_WaveFile::save_alaw(FILE *fp,

  const EST_Wave &wv,

  EST_sample_type_t stype, int bo)

--- a/speech_class/EST_WaveFile.h

+++ b/speech_class/EST_WaveFile.h

@@ -147,6 +147,8 @@ public:

   static EST_read_status load_ulaw(LoadWave_TokenStreamArgs);

   static EST_write_status save_alaw(SaveWave_TokenStreamArgs);

+  static EST_write_status save_alaw_header(SaveWave_TokenStreamArgs);

+  static EST_write_status save_alaw_data(SaveWave_TokenStreamArgs);

   static EST_read_status load_alaw(LoadWave_TokenStreamArgs);

   static EST_TNamedEnumI<EST_WaveFileType, Info> map;

--- a/speech_class/EST_wave_io.cc

+++ b/speech_class/EST_wave_io.cc

@@ -1071,17 +1071,44 @@ enum EST_read_status load_wave_alaw(EST_

     return format_ok;

 }

-enum EST_write_status save_wave_alaw(FILE *fp, const short *data, int offset,

+enum EST_write_status save_wave_alaw_header(FILE *fp,

+				     int num_samples, int num_channels,

+				     int sample_rate,

+				     enum EST_sample_type_t sample_type, int bo)

+{

+    (void) sample_rate;

+    (void) sample_type;

+    (void) fp;

+    (void) num_samples;

+    (void) num_channels;

+    (void) bo;

+    return write_ok;

+}

+

+enum EST_write_status save_wave_alaw_data(FILE *fp, const short *data, int offset,

 				     int num_samples, int num_channels,

 				     int sample_rate,

 				     enum EST_sample_type_t sample_type, int bo)

 {

     (void)sample_rate;

     (void)sample_type;

+    if (data == NULL)

+       return write_ok;

     return save_wave_raw(fp,data,offset,num_samples,num_channels,

 			 8000,st_alaw,bo);

+}

+enum EST_write_status save_wave_alaw(FILE *fp, const short *data, int offset,

+				     int num_samples, int num_channels,

+				     int sample_rate,

+				     enum EST_sample_type_t sample_type, int bo)

+{

+    save_wave_alaw_header(fp, num_samples, num_channels,

+                          sample_rate, sample_type, bo);

+    return save_wave_alaw_data(fp, data, offset,

+				     num_samples, num_channels,

+				     sample_rate, sample_type, bo);

 }

--- a/speech_class/waveP.h

+++ b/speech_class/waveP.h

@@ -91,6 +91,16 @@ enum EST_write_status save_wave_alaw(FIL

 				int sample_rate,

 				enum EST_sample_type_t, int bo);

+enum EST_write_status save_wave_alaw_header(FILE *fp,

+				int num_samples, int num_channels,

+				int sample_rate,

+				enum EST_sample_type_t sample_type, int bo);

+

+enum EST_write_status save_wave_alaw_data(FILE *fp, const short *data, int offset,

+				int num_samples, int num_channels,

+				int sample_rate,

+				enum EST_sample_type_t sample_type, int bo);

+

 enum EST_read_status load_wave_nist(EST_TokenStream &ts, short **data, int

 	 *num_samples, int *num_channels, int *word_size, int

 	 *sample_rate,  enum EST_sample_type_t *sample_type, int *bo, int