Unify kernel buffer size to 4 kB and introduce patch for cx88-based DVB cards.

git-svn-id: svn://svn.videolan.org/dvblast/trunk@149 55d3f8b6-4a41-4d2d-a900-313d1436a5b8

extra/kernel-patches/01-cx23885.patch

@@ -5,7 +5,7 @@
  
  	port->ts_packet_size  = 188 * 4;
 -	port->ts_packet_count = 32;
-+	port->ts_packet_count = 4;
++	port->ts_packet_count = 5;
  
  	*size  = port->ts_packet_size * port->ts_packet_count;
  	*count = 32;

extra/kernel-patches/02-saa7146.patch

@@ -5,7 +5,7 @@
  	}
  	saa7146_write(dev, PROT_ADDR3, budget->buffer_size);
 -	saa7146_write(dev, BASE_PAGE3, budget->pt.dma | ME1 | 0x90);
-+	saa7146_write(dev, BASE_PAGE3, budget->pt.dma | ME1 | 0x60);
++	saa7146_write(dev, BASE_PAGE3, budget->pt.dma | ME1 | 0x50);
  
  	saa7146_write(dev, PITCH3, budget->buffer_width);
  	saa7146_write(dev, NUM_LINE_BYTE3,

extra/kernel-patches/03-cx88.patch

+--- linux/drivers/media/video/cx88/cx88-dvb.c.orig	2010-02-22 14:58:43.000000000 +0100
++++ linux/drivers/media/video/cx88/cx88-dvb.c	2010-07-09 11:15:12.000000000 +0200
+@@ -80,7 +80,7 @@
+ 	struct cx8802_dev *dev = q->priv_data;
+ 
+ 	dev->ts_packet_size  = 188 * 4;
+-	dev->ts_packet_count = 32;
++	dev->ts_packet_count = 5;
+ 
+ 	*size  = dev->ts_packet_size * dev->ts_packet_count;
+ 	*count = 32;

extra/kernel-patches/README

@@ -5,5 +5,5 @@ These kernel patches are designed to dramatically improve the latency
 between the DVB card and DVBlast's output, especially on low symbol rate
 transponders, at the expense of a slightly higher CPU consumption.
 
-Basically they decrease the size of the transmission buffers from the card,
-so that TS packets are handled more frequently.
+Basically they decrease the size of the transmission buffers from the card
+to 4 kB, so that TS packets are handled more frequently.