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path: root/drivers/media/dvb/ngene/ngene-dvb.c
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Diffstat (limited to 'drivers/media/dvb/ngene/ngene-dvb.c')
-rw-r--r--drivers/media/dvb/ngene/ngene-dvb.c46
1 files changed, 38 insertions, 8 deletions
diff --git a/drivers/media/dvb/ngene/ngene-dvb.c b/drivers/media/dvb/ngene/ngene-dvb.c
index 0b494323316..fcb16a615aa 100644
--- a/drivers/media/dvb/ngene/ngene-dvb.c
+++ b/drivers/media/dvb/ngene/ngene-dvb.c
@@ -118,6 +118,16 @@ static void swap_buffer(u32 *p, u32 len)
}
}
+/* start of filler packet */
+static u8 fill_ts[] = { 0x47, 0x1f, 0xff, 0x10, TS_FILLER };
+
+/* #define DEBUG_CI_XFER */
+#ifdef DEBUG_CI_XFER
+static u32 ok;
+static u32 overflow;
+static u32 stripped;
+#endif
+
void *tsin_exchange(void *priv, void *buf, u32 len, u32 clock, u32 flags)
{
struct ngene_channel *chan = priv;
@@ -126,21 +136,41 @@ void *tsin_exchange(void *priv, void *buf, u32 len, u32 clock, u32 flags)
if (flags & DF_SWAP32)
swap_buffer(buf, len);
+
if (dev->ci.en && chan->number == 2) {
- if (dvb_ringbuffer_free(&dev->tsin_rbuf) > len) {
- dvb_ringbuffer_write(&dev->tsin_rbuf, buf, len);
- wake_up_interruptible(&dev->tsin_rbuf.queue);
+ while (len >= 188) {
+ if (memcmp(buf, fill_ts, sizeof fill_ts) != 0) {
+ if (dvb_ringbuffer_free(&dev->tsin_rbuf) >= 188) {
+ dvb_ringbuffer_write(&dev->tsin_rbuf, buf, 188);
+ wake_up(&dev->tsin_rbuf.queue);
+#ifdef DEBUG_CI_XFER
+ ok++;
+#endif
+ }
+#ifdef DEBUG_CI_XFER
+ else
+ overflow++;
+#endif
+ }
+#ifdef DEBUG_CI_XFER
+ else
+ stripped++;
+
+ if (ok % 100 == 0 && overflow)
+ printk(KERN_WARNING "%s: ok %u overflow %u dropped %u\n", __func__, ok, overflow, stripped);
+#endif
+ buf += 188;
+ len -= 188;
}
- return 0;
+ return NULL;
}
- if (chan->users > 0) {
+
+ if (chan->users > 0)
dvb_dmx_swfilter(&chan->demux, buf, len);
- }
+
return NULL;
}
-u8 fill_ts[188] = { 0x47, 0x1f, 0xff, 0x10 };
-
void *tsout_exchange(void *priv, void *buf, u32 len, u32 clock, u32 flags)
{
struct ngene_channel *chan = priv;