X-Git-Url: http://de.git.xonotic.org/?p=xonotic%2Fdarkplaces.git;a=blobdiff_plain;f=snd_mix.c;h=10da40047ec05355f7ccf85eff87d7b1a115344f;hp=e976bca79e95289f9a4097616255a743209330b4;hb=786fd991962a03bacba0d8ba8fc3dd7f7dfdc0ef;hpb=d753608b3258d9713df8b2720d808da22b1442aa

diff --git a/snd_mix.c b/snd_mix.c
index e976bca7..10da4004 100644
--- a/snd_mix.c
+++ b/snd_mix.c
@@ -21,13 +21,14 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 #include "quakedef.h"
 #include "snd_main.h"
 
+extern cvar_t snd_softclip;
 
 static portable_sampleframe_t paintbuffer[PAINTBUFFER_SIZE];
 static portable_sampleframe_t paintbuffer_unswapped[PAINTBUFFER_SIZE];
 
 extern speakerlayout_t snd_speakerlayout; // for querying the listeners
 
-extern void SCR_CaptureVideo_SoundFrame(const portable_sampleframe_t *paintbuffer, size_t length);
+#ifdef CONFIG_VIDEO_CAPTURE
 static void S_CaptureAVISound(const portable_sampleframe_t *paintbuffer, size_t length)
 {
 	size_t i;
@@ -46,16 +47,94 @@ static void S_CaptureAVISound(const portable_sampleframe_t *paintbuffer, size_t
 
 	SCR_CaptureVideo_SoundFrame(paintbuffer_unswapped, length);
 }
+#endif
+
+extern cvar_t snd_softclip;
+
+static void S_SoftClipPaintBuffer(portable_sampleframe_t *painted_ptr, int nbframes, int width, int nchannels)
+{
+	int i;
+
+	if((snd_softclip.integer == 1 && width <= 2) || snd_softclip.integer > 1)
+	{
+		portable_sampleframe_t *p = painted_ptr;
+
+#if 0
+/* Soft clipping, the sound of a dream, thanks to Jon Wattes
+   post to Musicdsp.org */
+#define SOFTCLIP(x) (x) = sin(bound(-M_PI/2, (x), M_PI/2)) * 0.25
+#endif
+
+		// let's do a simple limiter instead, seems to sound better
+		static float maxvol = 0;
+		maxvol = max(1.0f, maxvol * (1.0f - nbframes / (0.4f * snd_renderbuffer->format.speed)));
+#define SOFTCLIP(x) if(fabs(x)>maxvol) maxvol=fabs(x); (x) /= maxvol;
+
+		if (nchannels == 8)  // 7.1 surround
+		{
+			for (i = 0;i < nbframes;i++, p++)
+			{
+				SOFTCLIP(p->sample[0]);
+				SOFTCLIP(p->sample[1]);
+				SOFTCLIP(p->sample[2]);
+				SOFTCLIP(p->sample[3]);
+				SOFTCLIP(p->sample[4]);
+				SOFTCLIP(p->sample[5]);
+				SOFTCLIP(p->sample[6]);
+				SOFTCLIP(p->sample[7]);
+			}
+		}
+		else if (nchannels == 6)  // 5.1 surround
+		{
+			for (i = 0; i < nbframes; i++, p++)
+			{
+				SOFTCLIP(p->sample[0]);
+				SOFTCLIP(p->sample[1]);
+				SOFTCLIP(p->sample[2]);
+				SOFTCLIP(p->sample[3]);
+				SOFTCLIP(p->sample[4]);
+				SOFTCLIP(p->sample[5]);
+			}
+		}
+		else if (nchannels == 4)  // 4.0 surround
+		{
+			for (i = 0; i < nbframes; i++, p++)
+			{
+				SOFTCLIP(p->sample[0]);
+				SOFTCLIP(p->sample[1]);
+				SOFTCLIP(p->sample[2]);
+				SOFTCLIP(p->sample[3]);
+			}
+		}
+		else if (nchannels == 2)  // 2.0 stereo
+		{
+			for (i = 0; i < nbframes; i++, p++)
+			{
+				SOFTCLIP(p->sample[0]);
+				SOFTCLIP(p->sample[1]);
+			}
+		}
+		else if (nchannels == 1)  // 1.0 mono
+		{
+			for (i = 0; i < nbframes; i++, p++)
+			{
+				SOFTCLIP(p->sample[0]);
+			}
+		}
+#undef SOFTCLIP
+	}
+}
 
-static void S_ConvertPaintBuffer(const portable_sampleframe_t *painted_ptr, void *rb_ptr, int nbframes, int width, int channels)
+static void S_ConvertPaintBuffer(portable_sampleframe_t *painted_ptr, void *rb_ptr, int nbframes, int width, int nchannels)
 {
 	int i, val;
+
 	// FIXME: add 24bit and 32bit float formats
 	// FIXME: optimize with SSE intrinsics?
 	if (width == 2)  // 16bit
 	{
 		short *snd_out = (short*)rb_ptr;
-		if (channels == 8)  // 7.1 surround
+		if (nchannels == 8)  // 7.1 surround
 		{
 			for (i = 0;i < nbframes;i++, painted_ptr++)
 			{
@@ -69,7 +148,7 @@ static void S_ConvertPaintBuffer(const portable_sampleframe_t *painted_ptr, void
 				val = (int)(painted_ptr->sample[7] * 32768.0f);*snd_out++ = bound(-32768, val, 32767);
 			}
 		}
-		else if (channels == 6)  // 5.1 surround
+		else if (nchannels == 6)  // 5.1 surround
 		{
 			for (i = 0; i < nbframes; i++, painted_ptr++)
 			{
@@ -81,7 +160,7 @@ static void S_ConvertPaintBuffer(const portable_sampleframe_t *painted_ptr, void
 				val = (int)(painted_ptr->sample[5] * 32768.0f);*snd_out++ = bound(-32768, val, 32767);
 			}
 		}
-		else if (channels == 4)  // 4.0 surround
+		else if (nchannels == 4)  // 4.0 surround
 		{
 			for (i = 0; i < nbframes; i++, painted_ptr++)
 			{
@@ -91,7 +170,7 @@ static void S_ConvertPaintBuffer(const portable_sampleframe_t *painted_ptr, void
 				val = (int)(painted_ptr->sample[3] * 32768.0f);*snd_out++ = bound(-32768, val, 32767);
 			}
 		}
-		else if (channels == 2)  // 2.0 stereo
+		else if (nchannels == 2)  // 2.0 stereo
 		{
 			for (i = 0; i < nbframes; i++, painted_ptr++)
 			{
@@ -99,7 +178,7 @@ static void S_ConvertPaintBuffer(const portable_sampleframe_t *painted_ptr, void
 				val = (int)(painted_ptr->sample[1] * 32768.0f);*snd_out++ = bound(-32768, val, 32767);
 			}
 		}
-		else if (channels == 1)  // 1.0 mono
+		else if (nchannels == 1)  // 1.0 mono
 		{
 			for (i = 0; i < nbframes; i++, painted_ptr++)
 			{
@@ -109,12 +188,12 @@ static void S_ConvertPaintBuffer(const portable_sampleframe_t *painted_ptr, void
 
 		// noise is really really annoying
 		if (cls.timedemo)
-			memset(rb_ptr, 0, nbframes * channels * width);
+			memset(rb_ptr, 0, nbframes * nchannels * width);
 	}
 	else  // 8bit
 	{
 		unsigned char *snd_out = (unsigned char*)rb_ptr;
-		if (channels == 8)  // 7.1 surround
+		if (nchannels == 8)  // 7.1 surround
 		{
 			for (i = 0; i < nbframes; i++, painted_ptr++)
 			{
@@ -128,7 +207,7 @@ static void S_ConvertPaintBuffer(const portable_sampleframe_t *painted_ptr, void
 				val = (int)(painted_ptr->sample[7] * 128.0f) + 128; *snd_out++ = bound(0, val, 255);
 			}
 		}
-		else if (channels == 6)  // 5.1 surround
+		else if (nchannels == 6)  // 5.1 surround
 		{
 			for (i = 0; i < nbframes; i++, painted_ptr++)
 			{
@@ -140,7 +219,7 @@ static void S_ConvertPaintBuffer(const portable_sampleframe_t *painted_ptr, void
 				val = (int)(painted_ptr->sample[5] * 128.0f) + 128; *snd_out++ = bound(0, val, 255);
 			}
 		}
-		else if (channels == 4)  // 4.0 surround
+		else if (nchannels == 4)  // 4.0 surround
 		{
 			for (i = 0; i < nbframes; i++, painted_ptr++)
 			{
@@ -150,7 +229,7 @@ static void S_ConvertPaintBuffer(const portable_sampleframe_t *painted_ptr, void
 				val = (int)(painted_ptr->sample[3] * 128.0f) + 128; *snd_out++ = bound(0, val, 255);
 			}
 		}
-		else if (channels == 2)  // 2.0 stereo
+		else if (nchannels == 2)  // 2.0 stereo
 		{
 			for (i = 0; i < nbframes; i++, painted_ptr++)
 			{
@@ -158,7 +237,7 @@ static void S_ConvertPaintBuffer(const portable_sampleframe_t *painted_ptr, void
 				val = (int)(painted_ptr->sample[1] * 128.0f) + 128; *snd_out++ = bound(0, val, 255);
 			}
 		}
-		else if (channels == 1)  // 1.0 mono
+		else if (nchannels == 1)  // 1.0 mono
 		{
 			for (i = 0;i < nbframes;i++, painted_ptr++)
 			{
@@ -168,7 +247,7 @@ static void S_ConvertPaintBuffer(const portable_sampleframe_t *painted_ptr, void
 
 		// noise is really really annoying
 		if (cls.timedemo)
-			memset(rb_ptr, 128, nbframes * channels);
+			memset(rb_ptr, 128, nbframes * nchannels);
 	}
 }
 
@@ -209,7 +288,7 @@ void S_MixToBuffer(void *stream, unsigned int bufferframes)
 	float sample[3];
 	double posd;
 	double speedd;
-	float sum;
+	float maxvol;
 	qboolean looping;
 	qboolean silent;
 
@@ -224,7 +303,7 @@ void S_MixToBuffer(void *stream, unsigned int bufferframes)
 
 		// paint in the channels.
 		// channels with zero volumes still advance in time but don't paint.
-		ch = channels;
+		ch = channels; // cppcheck complains here but it is wrong, channels is a channel_t[MAX_CHANNELS] and not an int
 		for (channelindex = 0;channelindex < (int)total_channels;channelindex++, ch++)
 		{
 			sfx = ch->sfx;
@@ -246,9 +325,31 @@ void S_MixToBuffer(void *stream, unsigned int bufferframes)
 				vol[i] = ch->volume[i];
 
 			// check total volume level, because we can skip some code on silent sounds but other code must still run (position updates mainly)
+			maxvol = 0;
 			for (i = 0;i < SND_LISTENERS;i++)
-				sum += vol[i]*vol[i];
-			silent = sum < 0.001f;
+				if(vol[i] > maxvol)
+					maxvol = vol[i];
+			switch(snd_renderbuffer->format.width)
+			{
+				case 1: // 8bpp
+					silent = maxvol < (1.0f / (256.0f));
+					// so silent it has zero effect
+					break;
+				case 2: // 16bpp
+					silent = maxvol < (1.0f / (65536.0f));
+					// so silent it has zero effect
+					break;
+				default: // floating point
+					silent = maxvol < 1.0e-13f;
+					// 130 dB is difference between hearing
+					// threshold and a jackhammer from
+					// working distance.
+					// therefore, anyone who turns up
+					// volume so much they notice this
+					// cutoff, likely already has their
+					// ear-drums blown out anyway.
+					break;
+			}
 
 			// when doing prologic mixing, some channels invert one side
 			if (ch->prologic_invert == -1)
@@ -261,7 +362,7 @@ void S_MixToBuffer(void *stream, unsigned int bufferframes)
 
 			// do the actual paint now (may skip work if silent)
 			paint = paintbuffer;
-			wantframes = totalmixframes;
+			istartframe = 0;
 			for (wantframes = totalmixframes;wantframes > 0;posd += count * speedd, wantframes -= count)
 			{
 				// check if this is a delayed sound
@@ -419,8 +520,12 @@ void S_MixToBuffer(void *stream, unsigned int bufferframes)
 				S_StopChannel(ch - channels, false, false);
 		}
 
+		S_SoftClipPaintBuffer(paintbuffer, totalmixframes, snd_renderbuffer->format.width, snd_renderbuffer->format.channels);
+
+#ifdef CONFIG_VIDEO_CAPTURE
 		if (!snd_usethreadedmixing)
 			S_CaptureAVISound(paintbuffer, totalmixframes);
+#endif
 
 		S_ConvertPaintBuffer(paintbuffer, outbytes, totalmixframes, snd_renderbuffer->format.width, snd_renderbuffer->format.channels);