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changeset 523:450c7745379a

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Merge
author Michael Pavone <pavone@retrodev.com>
date Tue, 11 Feb 2014 21:52:15 -0800
parents 6a14c5a95648 (diff) 0b21a1a73fb7 (current diff)
children fb39534b6604
files
diffstat 3 files changed, 19 insertions(+), 11 deletions(-) [+]
line wrap: on
line diff
--- a/psg.c	Sun Feb 09 17:16:55 2014 -0800
+++ b/psg.c	Tue Feb 11 21:52:15 2014 -0800
@@ -74,7 +74,7 @@
 	}
 }
 
-#define PSG_VOL_DIV 6
+#define PSG_VOL_DIV 14
 
 //table shamelessly swiped from PSG doc from smspower.org
 int16_t volume_table[16] = {
--- a/wave.c	Sun Feb 09 17:16:55 2014 -0800
+++ b/wave.c	Tue Feb 11 21:52:15 2014 -0800
@@ -1,6 +1,6 @@
 /*
  Copyright 2013 Michael Pavone
- This file is part of BlastEm. 
+ This file is part of BlastEm.
  BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text.
 */
 #include "wave.h"
@@ -31,13 +31,13 @@
 	uint32_t size = ftell(f);
 	fseek(f, offsetof(wave_header, chunk.size), SEEK_SET);
 	size -= 8;
-	if (fwrite(&size, sizeof(size), 1, f) != sizeof(size)) {
+	if (fwrite(&size, sizeof(size), 1, f) != 1) {
 		fclose(f);
 		return 0;
 	}
 	fseek(f, offsetof(wave_header, data_header.size), SEEK_SET);
 	size -= 36;
-	if (fwrite(&size, sizeof(size), 1, f)) {
+	if (fwrite(&size, sizeof(size), 1, f) != 1) {
 		fclose(f);
 		return 0;
 	}
--- a/ym2612.c	Sun Feb 09 17:16:55 2014 -0800
+++ b/ym2612.c	Tue Feb 11 21:52:15 2014 -0800
@@ -232,7 +232,8 @@
 	}
 }
 
-#define YM_VOLUME_DIVIDER 2
+#define YM_VOLUME_MULTIPLIER 2
+#define YM_VOLUME_DIVIDER 3
 #define YM_MOD_SHIFT 1
 
 #define TIMER_A_MAX 1023
@@ -455,7 +456,7 @@
 					if (value & 0x2000) {
 						value |= 0xC000;
 					}
-					dfprintf(debug_file, "channel %d output: %d\n", channel, value / YM_VOLUME_DIVIDER);
+					dfprintf(debug_file, "channel %d output: %d\n", channel, (value * YM_VOLUME_MULTIPLIER) / YM_VOLUME_DIVIDER);
 				}
 			}
 			//puts("operator update done");
@@ -470,18 +471,25 @@
 			context->audio_buffer[context->buffer_pos] = 0;
 			context->audio_buffer[context->buffer_pos + 1] = 0;
 			for (int i = 0; i < NUM_CHANNELS; i++) {
-				int16_t value = context->channels[i].output & 0x3FE0;
-				if (value & 0x2000) {
-					value |= 0xC000;
+				int16_t value = context->channels[i].output;
+				if (value > 0x1FE0) {
+					value = 0x1FE0;
+				} else if (value < -0x1FF0) {
+					value = -0x1FF0;
+				} else {
+					value &= 0x3FE0;
+					if (value & 0x2000) {
+						value |= 0xC000;
+					}
 				}
 				if (context->channels[i].logfile) {
 					fwrite(&value, sizeof(value), 1, context->channels[i].logfile);
 				}
 				if (context->channels[i].lr & 0x80) {
-					context->audio_buffer[context->buffer_pos] += value / YM_VOLUME_DIVIDER;
+					context->audio_buffer[context->buffer_pos] += (value * YM_VOLUME_MULTIPLIER) / YM_VOLUME_DIVIDER;
 				}
 				if (context->channels[i].lr & 0x40) {
-					context->audio_buffer[context->buffer_pos+1] += value / YM_VOLUME_DIVIDER;
+					context->audio_buffer[context->buffer_pos+1] += (value * YM_VOLUME_MULTIPLIER) / YM_VOLUME_DIVIDER;
 				}
 			}
 			context->buffer_pos += 2;