1 files changed, 91 insertions, 0 deletions
diff --git a/mpeglib/lib/tplay/wav.cpp b/mpeglib/lib/tplay/wav.cpp
new file mode 100644
index 00000000..ca284c37
--- /dev/null
+++ b/mpeglib/lib/tplay/wav.cpp
@@ -0,0 +1,91 @@
+/* 
+ * tplay - buffered audio player
+ *
+ * (c) 1997 ilkka karvinen <ik@iki.fi>
+ *
+ * Copyright under the GNU GENERAL PUBLIC LICENSE
+ *   (see the file COPYING in this directory)
+ *
+ * 
+ *   RIFF/WAVE file header checking.
+ *   check_wav returns zero if RIFF/WAVE file format is found.
+ *   Reference: http://www.wotsit.demon.co.uk/formats/wav/wav.txt
+ */
+
+#include "tplayfunctions.h"
+
+#include <iostream>
+
+using namespace std;
+
+int read_wav(struct info_struct* info, char * buffer) {
+   WORD format, channels, bits;
+   DWORD magic, samples_per_second, length, data_length;
+
+   magic = read_little_endian_long(buffer);
+   if (magic != RIFF_MAGIC)	/* RIFF file? */
+      return (1);
+   magic = read_little_endian_long(buffer + 0x08);
+   if (magic != WAVE_MAGIC)	/* WAVE file? */
+      return (1);
+   magic = read_little_endian_long(buffer + 0x24);
+   if ((magic != DATA_MAGIC) && (magic != INFO_MAGIC)) {	/* data-portion there? */
+     cout << "Unknown WAV-header magic. Continuing anyway."<<endl;
+   }
+
+   length = read_little_endian_long(buffer + 0x10);
+
+   /* Subchunk length should be 16 here */
+   if (length != 16)
+      errdie("Unknown RIFF/WAVE header");
+
+   format = read_little_endian_word(buffer + 0x14);
+
+   switch (format) {
+   case 0x0001:		/* PCM format */
+      break;
+   case 0x0101:		/* mu-law */
+      die("Mu-law RIFF/WAVE audio file not supported");
+      break;
+   case 0x0102:		/* a-law */
+      die("A-law RIFF/WAVE audio file not supported");
+      break;
+   case 0x0103:		/* ADPCM */
+      die("ADPCM RIFF/WAVE audio file not supported");
+      break;
+   default:
+      errdie("Unknown RIFF/WAVE audio file format");
+      break;
+   }
+
+   info->filetype = RIFF_FILE;
+
+   channels = read_little_endian_word(buffer + 0x16);
+   samples_per_second = read_little_endian_long(buffer + 0x18);
+   cout << "samples_per_second:"<<samples_per_second<<endl;
+   bits = read_little_endian_word(buffer + 0x22);
+
+   if (bits == 12)
+      die("12 bits per sample not supported");
+
+   data_length = read_little_endian_long(buffer + 0x28);
+
+   /* Set audio parameters */
+   info->speed = (int) samples_per_second;
+   info->bits = (int) bits;
+   info->channels = (int) channels;
+   
+   if (info->verbose)
+      printf("RIFF/WAVE audio file: %ld samples/s, %d bits, %d channel(s).\n",
+	     info->speed, info->bits, info->channels);
+
+   /* Move data to start from the beginning of the buffer.            */
+   /* This is to ensure the correct behaviour of rounding when 16bits */
+   /* and/or stereo sample is to be played.                           */
+   memmove(buffer, buffer + 0x2c, info->blocksize - 0x2c);
+
+   /* Save audio sample starting point */
+   info->headerskip = 0x2c;
+
+   return (0);
+}