From 36e3fc8957abffa3218a6e3b61bef335eea80c03 Mon Sep 17 00:00:00 2001 From: Oliver Endriss Date: Sun, 3 Jul 2011 14:04:46 -0300 Subject: [PATCH] [media] ngene: Strip dummy packets inserted by the driver As the CI requires a continuous data stream, the driver inserts dummy packets when necessary. Do not pass these packets to userspace anymore. Signed-off-by: Oliver Endriss Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb/ngene/ngene-core.c | 2 +- drivers/media/dvb/ngene/ngene-dvb.c | 42 ++++++++++++++++++++++++---- drivers/media/dvb/ngene/ngene.h | 2 ++ 3 files changed, 39 insertions(+), 7 deletions(-) diff --git a/drivers/media/dvb/ngene/ngene-core.c b/drivers/media/dvb/ngene/ngene-core.c index df0f0bd00c0..f129a9303f8 100644 --- a/drivers/media/dvb/ngene/ngene-core.c +++ b/drivers/media/dvb/ngene/ngene-core.c @@ -507,7 +507,7 @@ void FillTSBuffer(void *Buffer, int Length, u32 Flags) { u32 *ptr = Buffer; - memset(Buffer, 0xff, Length); + memset(Buffer, TS_FILLER, Length); while (Length > 0) { if (Flags & DF_SWAP32) *ptr = 0x471FFF10; diff --git a/drivers/media/dvb/ngene/ngene-dvb.c b/drivers/media/dvb/ngene/ngene-dvb.c index ba209cb3e0b..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) 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; diff --git a/drivers/media/dvb/ngene/ngene.h b/drivers/media/dvb/ngene/ngene.h index 90fa136850c..5443dc0caea 100644 --- a/drivers/media/dvb/ngene/ngene.h +++ b/drivers/media/dvb/ngene/ngene.h @@ -789,6 +789,8 @@ struct ngene { u8 uart_rbuf[UART_RBUF_LEN]; int uart_rp, uart_wp; +#define TS_FILLER 0x6f + u8 *tsout_buf; #define TSOUT_BUF_SIZE (512*188*8) struct dvb_ringbuffer tsout_rbuf; -- 2.41.0