ref: b932593c9e68337bfcbd43f8b69f5a4cc8d04ff8
parent: 08925d637e30eb12889129c19f53dddef9be6e2e
author: Simon Howard <fraggle@gmail.com>
date: Mon Sep 5 17:03:43 EDT 2005
16-bit sound Subversion-branch: /trunk/chocolate-doom Subversion-revision: 74
--- a/src/i_sound.c
+++ b/src/i_sound.c
@@ -1,7 +1,7 @@
// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
-// $Id: i_sound.c 73 2005-09-05 20:32:18Z fraggle $
+// $Id: i_sound.c 74 2005-09-05 21:03:43Z fraggle $
//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 2005 Simon Howard
@@ -22,6 +22,9 @@
// 02111-1307, USA.
//
// $Log$
+// Revision 1.12 2005/09/05 21:03:43 fraggle
+// 16-bit sound
+//
// Revision 1.11 2005/09/05 20:32:18 fraggle
// Use the system-nonspecific sound code to assign the channel number used
// by SDL. Remove handle tagging stuff.
@@ -67,7 +70,7 @@
//-----------------------------------------------------------------------------
static const char
-rcsid[] = "$Id: i_sound.c 73 2005-09-05 20:32:18Z fraggle $";
+rcsid[] = "$Id: i_sound.c 74 2005-09-05 21:03:43Z fraggle $";
#include <stdio.h>
#include <stdlib.h>
@@ -97,14 +100,21 @@
if (samplerate == 11025)
{- // need to expand to 2 channels, and expand 11025->22050
+ // need to expand to 2 channels, 11025->22050 and 8->16 bit
- result = Z_Malloc(length * 4, PU_STATIC, NULL);
+ result = Z_Malloc(length * 8, PU_STATIC, NULL);
for (i=0; i<length; ++i)
{- result[i * 4] = result[i * 4 + 1]
- = result[i * 4 + 2] = result[i * 4 + 3] = data[i];
+ Uint16 sample;
+
+ sample = data[i] | (data[i] << 8);
+ sample -= 32768;
+
+ result[i * 8] = result[i * 8 + 2]
+ = result[i * 8 + 4] = result[i * 8 + 6] = sample & 0xff;
+ result[i * 8 + 1] = result[i * 8 + 3]
+ = result[i * 8 + 5] = result[i * 8 + 7] = (sample >> 8) & 0xff;
}
}
else if (samplerate == 22050)
@@ -111,11 +121,17 @@
{// need to expand to 2 channels (sample rate is already correct)
- result = Z_Malloc(length * 2, PU_STATIC, NULL);
+ result = Z_Malloc(length * 4, PU_STATIC, NULL);
for (i=0; i<length; ++i)
{- result[i * 2] = result[i * 2 + 1] = data[i];
+ Uint16 sample;
+
+ sample = data[i] | (data[i] << 8);
+ sample -= 32768;
+
+ result[i * 4] = result[i * 4 + 2] = sample & 0xff;
+ result[i * 4 + 1] = result[i * 4 + 3] = (sample >> 8) & 0xff;
}
}
else
@@ -145,7 +161,7 @@
sound_chunks[sound].allocated = 1;
sound_chunks[sound].abuf = expand_sound_data(data + 8, samplerate, length);
- sound_chunks[sound].alen = (length * 2) * (22050 / samplerate);
+ sound_chunks[sound].alen = (length * 4) * (22050 / samplerate);
sound_chunks[sound].volume = 64;
}
@@ -321,7 +337,7 @@
return;
}
- if (Mix_OpenAudio(22050, AUDIO_U8, 2, 1024) < 0)
+ if (Mix_OpenAudio(22050, AUDIO_S16LSB, 2, 1024) < 0)
{fprintf(stderr, "Error initialising SDL_mixer: %s\n", SDL_GetError());
}