diff options
| -rw-r--r-- | drivers/media/test-drivers/vidtv/vidtv_mux.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/drivers/media/test-drivers/vidtv/vidtv_mux.c b/drivers/media/test-drivers/vidtv/vidtv_mux.c index 5d1a275d504b..26a742c95c76 100644 --- a/drivers/media/test-drivers/vidtv/vidtv_mux.c +++ b/drivers/media/test-drivers/vidtv/vidtv_mux.c @@ -21,6 +21,7 @@ #include <linux/delay.h> #include <linux/vmalloc.h> #include <linux/math64.h> + #include "vidtv_mux.h" #include "vidtv_ts.h" #include "vidtv_pes.h" @@ -376,6 +377,7 @@ static void vidtv_mux_clear(struct vidtv_mux *m) m->mux_buf_offset = 0; } +#define ERR_RATE 10000000 static void vidtv_mux_tick(struct work_struct *work) { struct vidtv_mux *m = container_of(work, @@ -384,6 +386,7 @@ static void vidtv_mux_tick(struct work_struct *work) struct dtv_frontend_properties *c = &m->fe->dtv_property_cache; u32 nbytes; u32 npkts; + u32 tot_bits = 0; while (m->streaming) { nbytes = 0; @@ -419,10 +422,26 @@ static void vidtv_mux_tick(struct work_struct *work) * but post BER count can be lower than pre BER, if the error * correction logic discards packages. */ - c->pre_bit_count.stat[0].uvalue = nbytes; - c->post_bit_count.stat[0].uvalue = nbytes; + c->pre_bit_count.stat[0].uvalue = nbytes * 8; + c->post_bit_count.stat[0].uvalue = nbytes * 8; c->block_count.stat[0].uvalue += npkts; + /* + * Even without any visible errors for the user, the pre-BER + * stats usually have an error range up to 1E-6. So, + * add some random error increment count to it. + * + * Please notice that this is a poor guy's implementation, + * as it will produce one corrected bit error every time + * ceil(total bytes / ERR_RATE) is incremented, without + * any sort of (pseudo-)randomness. + */ + tot_bits += nbytes * 8; + if (tot_bits > ERR_RATE) { + c->pre_bit_error.stat[0].uvalue++; + tot_bits -= ERR_RATE; + } + usleep_range(VIDTV_SLEEP_USECS, VIDTV_MAX_SLEEP_USECS); } } |