From 3849080ed771c0b9849d274775513b7c3fb91f6f Mon Sep 17 00:00:00 2001
From: Nicolas Bacca <arisme@users.sourceforge.net>
Date: Wed, 1 May 2002 22:22:22 +0000
Subject: [PATCH] Pause and start of volume support

svn-id: r4165
---
 sound/mixer.cpp | 14 ++++++++++++--
 sound/mixer.h   |  5 +++++
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/sound/mixer.cpp b/sound/mixer.cpp
index c8502685da0..5b0be93ee46 100644
--- a/sound/mixer.cpp
+++ b/sound/mixer.cpp
@@ -71,6 +71,10 @@ int SoundMixer::play_mp3_cdtrack(PlayingSoundHandle *handle, FILE* file, mad_tim
 #endif
 
 void SoundMixer::mix(int16 *buf, uint len) {
+
+	if (_paused)
+		return;
+
 	if (_premix_proc) {
 		_premix_proc(_premix_param, buf, len);
 	} else {
@@ -117,6 +121,10 @@ void SoundMixer::stop(int index) {
 		_channels[index]->destroy();
 }
 
+void SoundMixer::pause(bool paused) {
+        _paused = paused;
+}
+
 bool SoundMixer::has_active_channel() {
 	for(int i=0; i!=NUM_CHANNELS; i++)
 		if (_channels[i])
@@ -282,6 +290,7 @@ static inline int scale_sample(mad_fixed_t sample)
 
 void SoundMixer::Channel_MP3::mix(int16 *data, uint len) {
 	mad_fixed_t const *ch;
+	const int16 *vol_tab = _mixer->_volume_table;
 
 	if (_to_be_destroyed) {
 		real_destroy();
@@ -294,7 +303,7 @@ void SoundMixer::Channel_MP3::mix(int16 *data, uint len) {
 			if (_silence_cut > 0) {
 				_silence_cut--;
 			} else {
-				*data++ += scale_sample(*ch++);
+				*data++ += (int16)((float)scale_sample(*ch++) * ((float)vol_tab[1] / (float)128));
 				len--;
 			}
 			_pos_in_frame++;
@@ -359,6 +368,7 @@ SoundMixer::Channel_MP3_CDMUSIC::Channel_MP3_CDMUSIC(SoundMixer *mixer, FILE* fi
 void SoundMixer::Channel_MP3_CDMUSIC::mix(int16 *data, uint len) {
 	mad_fixed_t const *ch;
 	mad_timer_t frame_duration;
+	const int16 *vol_tab = _mixer->_volume_table;
 
 	if (_to_be_destroyed) {
 		real_destroy();
@@ -410,7 +420,7 @@ void SoundMixer::Channel_MP3_CDMUSIC::mix(int16 *data, uint len) {
 		// Get samples, play samples ... 
 		ch = _synth.pcm.samples[0] + _pos_in_frame;
 		while ((_pos_in_frame < _synth.pcm.length) && (len > 0)) {
-			*data++ += scale_sample(*ch++);
+			*data++ += (int16)((float)scale_sample(*ch++) * ((float)vol_tab[1] / (float)128));
 			len--;
 			_pos_in_frame++;
 		}
diff --git a/sound/mixer.h b/sound/mixer.h
index 6107d98ece6..319c6e69796 100644
--- a/sound/mixer.h
+++ b/sound/mixer.h
@@ -108,6 +108,8 @@ public:
 
 	int16 *_volume_table;
 
+	bool _paused;
+
 	enum {
 		NUM_CHANNELS = 16,
 	};
@@ -157,6 +159,9 @@ public:
 	/* set the volume, 0-256 */
 	void set_volume(int volume);
 
+	/* pause - unpause */
+	void pause(bool paused);
+
 };