From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 5/7] avradio/sdrdemux: adjust bandwidth to 200khz for FM probing
Date: Mon, 17 Jul 2023 02:27:02 +0200
Message-ID: <20230717002704.3092192-5-michael@niedermayer.cc> (raw)
In-Reply-To: <20230717002704.3092192-1-michael@niedermayer.cc>
This improves the local noise floor value
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavradio/sdrdemux.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavradio/sdrdemux.c b/libavradio/sdrdemux.c
index a4c590acf2..a0b80785ef 100644
--- a/libavradio/sdrdemux.c
+++ b/libavradio/sdrdemux.c
@@ -860,7 +860,7 @@ static int probe_fm(SDRContext *sdr)
{
int i;
int bandwidth_f = sdr->fm_bandwidth;
- int half_bw_i = bandwidth_f * (int64_t)sdr->block_size / sdr->sdr_sample_rate;
+ int half_bw_i = 200*1000 * (int64_t)sdr->block_size / sdr->sdr_sample_rate;
int floor_bw_i = 10*1000 * (int64_t)sdr->block_size / sdr->sdr_sample_rate;
float last_score[3] = {FLT_MAX, FLT_MAX, FLT_MAX};
int border_i = (sdr->sdr_sample_rate - FFMIN(sdr->bandwidth, sdr->sdr_sample_rate*7/8)) * sdr->block_size / sdr->sdr_sample_rate;
--
2.31.1
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next prev parent reply other threads:[~2023-07-17 0:27 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-17 0:26 [FFmpeg-devel] [PATCH 1/7] avradio/sdrdemux: icarrier just needs phase 2 block size Michael Niedermayer
2023-07-17 0:26 ` [FFmpeg-devel] [PATCH 2/7] avradio/sdr: compensate for RTLSDR frequency limitations Michael Niedermayer
2023-07-17 0:27 ` [FFmpeg-devel] [PATCH 3/7] avradio/sdrinradio: Print all tunable elements Michael Niedermayer
2023-07-17 0:27 ` [FFmpeg-devel] [PATCH 4/7] avradio/sdrdemux: Use a local noise floor in FM Probing Michael Niedermayer
2023-07-17 0:27 ` Michael Niedermayer [this message]
2023-07-17 0:27 ` [FFmpeg-devel] [PATCH 6/7] avradio/sdr: Support setting gain value manually and automatic Michael Niedermayer
2023-07-17 0:27 ` [FFmpeg-devel] [PATCH 7/7] avradio/sdr: workaround inverted gain parameter on sdrplay Michael Niedermayer
2023-07-18 21:26 ` [FFmpeg-devel] [PATCH 1/7] avradio/sdrdemux: icarrier just needs phase 2 block size Michael Niedermayer
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