From: Michael Niedermayer <michael@niedermayer.cc> To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org> Subject: [FFmpeg-devel] [PATCH 16/18] avradio/sdr: rename fft_p2 Date: Sat, 8 Jul 2023 23:25:28 +0200 Message-ID: <20230708212530.109692-16-michael@niedermayer.cc> (raw) In-Reply-To: <20230708212530.109692-1-michael@niedermayer.cc> The FFT really is from the point of view of the stream Phase 1 not Phase 2 of the demodulation. Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> --- libavradio/sdr.h | 4 ++-- libavradio/sdrdemux.c | 8 ++++---- 2 files changed, 6 insertions(+), 6 deletions(-) diff --git a/libavradio/sdr.h b/libavradio/sdr.h index 8a2ab1c78a..1582f70d86 100644 --- a/libavradio/sdr.h +++ b/libavradio/sdr.h @@ -95,10 +95,10 @@ typedef struct FIFOElement { typedef struct SDRStream { AVTXContext *ifft_ctx; - AVTXContext *fft_p2_ctx; + AVTXContext *fft_ctx; AVTXContext *ifft_p2_ctx; av_tx_fn ifft; - av_tx_fn fft_p2; + av_tx_fn fft; av_tx_fn ifft_p2; int block_size; int block_size_p2; diff --git a/libavradio/sdrdemux.c b/libavradio/sdrdemux.c index b51fa4296a..1ded01e957 100644 --- a/libavradio/sdrdemux.c +++ b/libavradio/sdrdemux.c @@ -979,7 +979,7 @@ static int demodulate_fm(SDRContext *sdr, int stream_index, AVPacket *pkt) //FIXME this only needs to be a RDFT //CONSIDER, this and in fact alot can be done with bandpass and lowpass filters instead of FFTs, find out which is better //CONSIDER synthesizing the carrier instead of IFFT, we have all parameters for that - sst->fft_p2(sst->fft_p2_ctx, sst->block, sst->iblock, sizeof(AVComplexFloat)); + sst->fft(sst->fft_ctx, sst->block, sst->iblock, sizeof(AVComplexFloat)); // Only the low N/2+1 are used the upper is just a reflection carrier19_i_exact = find_am_carrier(sdr, sst->block, 2*sst->block_size, (void*)(sst->block + 1 + sst->block_size), carrier19_i, 10, 10); @@ -1078,10 +1078,10 @@ static void free_stream(SDRContext *sdr, int stream_index) SDRStream *sst = st->priv_data; av_tx_uninit(&sst->ifft_ctx); - av_tx_uninit(&sst->fft_p2_ctx); + av_tx_uninit(&sst->fft_ctx); av_tx_uninit(&sst->ifft_p2_ctx); sst->ifft = NULL; - sst->fft_p2 = NULL; + sst->fft = NULL; sst->ifft_p2 = NULL; sst->block_size = 0; @@ -1127,7 +1127,7 @@ static int setup_stream(SDRContext *sdr, int stream_index, Station *station) if (sst->station->bandwidth_p2) { //Allocate 2nd stage demodulation fields if needed - ret = av_tx_init(&sst-> fft_p2_ctx, &sst-> fft_p2, AV_TX_FLOAT_FFT, 0, 2*sst->block_size , NULL, 0); + ret = av_tx_init(&sst-> fft_ctx, &sst-> fft, AV_TX_FLOAT_FFT, 0, 2*sst->block_size , NULL, 0); if (ret < 0) return ret; -- 2.31.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".
next prev parent reply other threads:[~2023-07-08 21:27 UTC|newest] Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-07-08 21:25 [FFmpeg-devel] [PATCH 01/18] avradio/sdrdemux: Fix uninitialized access Michael Niedermayer 2023-07-08 21:25 ` [FFmpeg-devel] [PATCH 02/18] avradio/sdrdemux: factor frequency tolerance constants out Michael Niedermayer 2023-07-08 21:25 ` [FFmpeg-devel] [PATCH 03/18] avradio/sdr: Add fm multiple parameter Michael Niedermayer 2023-07-08 21:25 ` [FFmpeg-devel] [PATCH 04/18] avradio/sdrinradio: Dont automatically select 2.56Mhz on the rtlsdr Michael Niedermayer 2023-07-08 21:25 ` [FFmpeg-devel] [PATCH 05/18] avradio/sdrdemux: Do not timeout negative stations Michael Niedermayer 2023-07-08 21:25 ` [FFmpeg-devel] [PATCH 06/18] avradio/sdrinradio: Factor print_and_free_list() out Michael Niedermayer 2023-07-08 21:25 ` [FFmpeg-devel] [PATCH 07/18] avradio/sdrinradio: Print list of Time Sources Michael Niedermayer 2023-07-08 21:25 ` [FFmpeg-devel] [PATCH 08/18] avradio: split out vissualization code Michael Niedermayer 2023-07-08 21:25 ` [FFmpeg-devel] [PATCH 09/18] avradio/sdrdemux: The RTLSDR DC artifact is not consistent Michael Niedermayer 2023-07-08 21:25 ` [FFmpeg-devel] [PATCH 10/18] avradio/sdr: eliminate avpriv_* Michael Niedermayer 2023-07-08 21:25 ` [FFmpeg-devel] [PATCH 11/18] avradio/vissualize: rotate waterfall Michael Niedermayer 2023-07-08 21:25 ` [FFmpeg-devel] [PATCH 12/18] avradio/sdrdemux: Set AVFMTCTX_NOHEADER Michael Niedermayer 2023-07-08 21:25 ` [FFmpeg-devel] [PATCH 13/18] avradio/sdrdemux: fix bug adding candidate stations and then crashing Michael Niedermayer 2023-07-08 21:25 ` [FFmpeg-devel] [PATCH 14/18] avradio/sdrdemux: fm_probe: dont allow bandwidh=sample rate Michael Niedermayer 2023-07-08 21:25 ` [FFmpeg-devel] [PATCH 15/18] doc: add sdr examples Michael Niedermayer 2023-07-08 21:25 ` Michael Niedermayer [this message] 2023-07-08 21:25 ` [FFmpeg-devel] [PATCH 17/18] avradio/sdrdemux: more correct phase 2 bandwidth of FM demodulation Michael Niedermayer 2023-07-08 21:25 ` [FFmpeg-devel] [PATCH 18/18] avradio/sdrdemux: Fix DC offset issue in AM demodulation Michael Niedermayer 2023-07-09 23:43 ` [FFmpeg-devel] [PATCH 01/18] avradio/sdrdemux: Fix uninitialized access Michael Niedermayer
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