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From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 2/6] avradio: Fill in missing bandwidth values at 80% of frequency
Date: Wed,  5 Jul 2023 00:22:58 +0200
Message-ID: <20230704222302.1129450-2-michael@niedermayer.cc> (raw)
In-Reply-To: <20230704222302.1129450-1-michael@niedermayer.cc>

The previous of 100% was a unrealistic default

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavradio/sdrdemux.c   | 2 ++
 libavradio/sdrinradio.c | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/libavradio/sdrdemux.c b/libavradio/sdrdemux.c
index cb5e7afb2f..39e2e54ee7 100644
--- a/libavradio/sdrdemux.c
+++ b/libavradio/sdrdemux.c
@@ -1401,6 +1401,8 @@ static int sdrfile_initial_setup(AVFormatContext *s)
         sdr->bandwidth       = sdr->sdr_sample_rate;
         sdr->fileheader_size = 40;
     }
+    if (sdr->bandwidth >= sdr->sdr_sample_rate)
+        sdr->bandwidth = sdr->sdr_sample_rate * 4 / 5;
 
     //After reading the first packet header we return to the begin so the packet can be read whole
     avio_seek(s->pb, 0, SEEK_SET);
diff --git a/libavradio/sdrinradio.c b/libavradio/sdrinradio.c
index 3a0b7f8ab4..c6f5742436 100644
--- a/libavradio/sdrinradio.c
+++ b/libavradio/sdrinradio.c
@@ -320,7 +320,7 @@ static int sdrindev_initial_hw_setup(AVFormatContext *s)
 
     // rtlsdr doesnt return a valid value
     if (!sdr->bandwidth)
-        sdr->bandwidth = sdr->sdr_sample_rate;
+        sdr->bandwidth = sdr->sdr_sample_rate * 4 / 5;
     av_log(s, AV_LOG_INFO, "bandwidth %"PRId64"\n", sdr->bandwidth);
 
     SoapySDRDevice_activateStream(soapy, soapyRxStream, 0, 0, 0);
-- 
2.31.1

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  reply	other threads:[~2023-07-04 22:23 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-07-04 22:22 [FFmpeg-devel] [PATCH 1/6] avradio/sdrdemux: end on EOF dont wraparound Michael Niedermayer
2023-07-04 22:22 ` Michael Niedermayer [this message]
2023-07-04 22:22 ` [FFmpeg-devel] [PATCH 3/6] avradio/sdrdemux: Skip probing in the area outside the bandwidth Michael Niedermayer
2023-07-04 22:23 ` [FFmpeg-devel] [PATCH 4/6] avradio/sdrdemux: adjust frequency precission in probing depending on modulation Michael Niedermayer
2023-07-04 22:23 ` [FFmpeg-devel] [PATCH 5/6] avradio/sdrdemux: When searching for stations move in smaller steps Michael Niedermayer
2023-07-04 22:23 ` [FFmpeg-devel] [PATCH 6/6] avradio/sdrdemux: slightly different normalization of FM scores Michael Niedermayer
2023-07-05 23:16 ` [FFmpeg-devel] [PATCH 1/6] avradio/sdrdemux: end on EOF dont wraparound Michael Niedermayer

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