* [FFmpeg-devel] [PATCH] libswresample/swresample: avoid s16p internal transfer format
@ 2023-09-23 21:02 Michael Niedermayer
2023-09-23 21:32 ` Paul B Mahol
0 siblings, 1 reply; 3+ messages in thread
From: Michael Niedermayer @ 2023-09-23 21:02 UTC (permalink / raw)
To: FFmpeg development discussions and patches; +Cc: Paul B Mahol
From: Paul B Mahol <onemda@gmail.com>
Instead use float one by default for sample rate conversions.
The s16p internal transfer format produces visible and hearable
quantization artifacts.
Signed-off-by: Paul B Mahol <onemda@gmail.com>
for S8 we continue to use S16 as it should have enough precision
Fate is adjusted so bitexactness is maintained between mips/arm/x86
if more tests became bit-inexact on some platform, the same change
can be done to them
The use of higher precision and float intermediates inevitably
leads to more differences between platforms.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libswresample/swresample.c | 8 +++++++-
tests/fate/acodec.mak | 8 ++++----
tests/fate/lavf-container.mak | 16 ++++++++--------
3 files changed, 19 insertions(+), 13 deletions(-)
diff --git a/libswresample/swresample.c b/libswresample/swresample.c
index fb3d7bccbf1..f2a9b404743 100644
--- a/libswresample/swresample.c
+++ b/libswresample/swresample.c
@@ -331,8 +331,14 @@ av_cold int swr_init(struct SwrContext *s){
s->rematrix_custom;
if(s->int_sample_fmt == AV_SAMPLE_FMT_NONE){
+ // 16bit or less to 16bit or less with the same sample rate
if( av_get_bytes_per_sample(s-> in_sample_fmt) <= 2
- && av_get_bytes_per_sample(s->out_sample_fmt) <= 2){
+ && av_get_bytes_per_sample(s->out_sample_fmt) <= 2
+ && s->out_sample_rate==s->in_sample_rate) {
+ s->int_sample_fmt= AV_SAMPLE_FMT_S16P;
+ // 8 -> 8, 16->8, 8->16bit
+ } else if( av_get_bytes_per_sample(s-> in_sample_fmt)
+ +av_get_bytes_per_sample(s->out_sample_fmt) <= 3 ) {
s->int_sample_fmt= AV_SAMPLE_FMT_S16P;
}else if( av_get_bytes_per_sample(s-> in_sample_fmt) <= 2
&& !s->rematrix
diff --git a/tests/fate/acodec.mak b/tests/fate/acodec.mak
index b15b1dcc205..7b09e3bd63d 100644
--- a/tests/fate/acodec.mak
+++ b/tests/fate/acodec.mak
@@ -156,14 +156,14 @@ fate-acodec-ra144: CMP_SHIFT = -320
FATE_ACODEC-$(call ENCDEC, ROQ_DPCM, ROQ, ARESAMPLE_FILTER) += fate-acodec-roqaudio
fate-acodec-roqaudio: FMT = roq
fate-acodec-roqaudio: CODEC = roq_dpcm
-fate-acodec-roqaudio: ENCOPTS = -ar 22050
-fate-acodec-roqaudio: DECOPTS = -ar 44100
+fate-acodec-roqaudio: ENCOPTS = -af aresample=22050:tsf=s16p
+fate-acodec-roqaudio: DECOPTS = -af aresample=44100:tsf=s16p
FATE_ACODEC-$(call ENCDEC, S302M, MPEGTS, ARESAMPLE_FILTER) += fate-acodec-s302m
fate-acodec-s302m: FMT = mpegts
fate-acodec-s302m: CODEC = s302m
-fate-acodec-s302m: ENCOPTS = -ar 48000 -strict -2
-fate-acodec-s302m: DECOPTS = -ar 44100
+fate-acodec-s302m: ENCOPTS = -af aresample=48000:tsf=s16p -strict -2
+fate-acodec-s302m: DECOPTS = -af aresample=44100:tsf=s16p
FATE_ACODEC-$(call ENCDEC, WAVPACK, WV, ARESAMPLE_FILTER) += fate-acodec-wavpack
fate-acodec-wavpack: FMT = wv
diff --git a/tests/fate/lavf-container.mak b/tests/fate/lavf-container.mak
index d4a0ac7510f..69330ae3b6f 100644
--- a/tests/fate/lavf-container.mak
+++ b/tests/fate/lavf-container.mak
@@ -39,13 +39,13 @@ $(FATE_LAVF_CONTAINER): $(AREF) $(VREF)
fate-lavf-asf: CMD = lavf_container "" "-c:a mp2 -ar 44100" "-r 25"
fate-lavf-avi fate-lavf-nut: CMD = lavf_container "" "-c:a mp2 -ar 44100 -threads 1"
fate-lavf-dv: CMD = lavf_container "-ar 48000 -channel_layout stereo" "-r 25 -s pal"
-fate-lavf-dv_pal: CMD = lavf_container_timecode_nodrop "-ar 48000 -r 25 -s pal -ac 2 -f dv"
-fate-lavf-dv_ntsc: CMD = lavf_container_timecode_drop "-ar 48000 -pix_fmt yuv411p -s ntsc -ac 2 -f dv"
+fate-lavf-dv_pal: CMD = lavf_container_timecode_nodrop "-af aresample=48000:tsf=s16p -r 25 -s pal -ac 2 -f dv"
+fate-lavf-dv_ntsc: CMD = lavf_container_timecode_drop "-af aresample=48000:tsf=s16p -pix_fmt yuv411p -s ntsc -ac 2 -f dv"
fate-lavf-flv fate-lavf-swf: CMD = lavf_container "" "-an"
fate-lavf-flm: CMD = lavf_container "" "-pix_fmt rgba"
-fate-lavf-gxf: CMD = lavf_container "-ar 48000" "-r 25 -s pal -ac 1 -threads 1"
-fate-lavf-gxf_pal: CMD = lavf_container_timecode_nodrop "-ar 48000 -r 25 -s pal -ac 1 -threads 1 -f gxf"
-fate-lavf-gxf_ntsc: CMD = lavf_container_timecode_drop "-ar 48000 -s ntsc -ac 1 -threads 1 -f gxf"
+fate-lavf-gxf: CMD = lavf_container "-af aresample=48000:tsf=s16p" "-r 25 -s pal -ac 1 -threads 1"
+fate-lavf-gxf_pal: CMD = lavf_container_timecode_nodrop "-af aresample=48000:tsf=s16p -r 25 -s pal -ac 1 -threads 1 -f gxf"
+fate-lavf-gxf_ntsc: CMD = lavf_container_timecode_drop "-af aresample=48000:tsf=s16p -s ntsc -ac 1 -threads 1 -f gxf"
fate-lavf-ismv: CMD = lavf_container_timecode "-an -write_tmcd 1 -c:v mpeg4 -threads 1"
fate-lavf-mkv: CMD = lavf_container "" "-c:a mp2 -c:v mpeg4 -ar 44100 -threads 1"
fate-lavf-mkv_attachment: CMD = lavf_container_attach "-c:a mp2 -c:v mpeg4 -threads 1 -f matroska"
@@ -53,9 +53,9 @@ fate-lavf-mov: CMD = lavf_container_timecode "-movflags +faststart -c:a pcm_alaw
fate-lavf-mov_rtphint: CMD = lavf_container "" "-movflags +rtphint -c:a pcm_alaw -c:v mpeg4 -threads 1 -f mov"
fate-lavf-mp4: CMD = lavf_container_timecode "-c:v mpeg4 -an -threads 1"
fate-lavf-mpg: CMD = lavf_container_timecode "-ar 44100 -threads 1"
-fate-lavf-mxf: CMD = lavf_container_timecode "-ar 48000 -bf 2 -threads 1"
-fate-lavf-mxf_d10: CMD = lavf_container "-ar 48000 -ac 2" "-r 25 -vf scale=720:576,pad=720:608:0:32,setfield=tff -c:v mpeg2video -g 0 -flags +ildct+low_delay -dc 10 -non_linear_quant 1 -intra_vlc 1 -qscale 1 -ps 1 -qmin 1 -rc_max_vbv_use 1 -rc_min_vbv_use 1 -pix_fmt yuv422p -minrate 30000k -maxrate 30000k -b 30000k -bufsize 1200000 -rc_init_occupancy 1200000 -qmax 12 -f mxf_d10"
-fate-lavf-mxf_dv25: CMD = lavf_container "-ar 48000 -ac 2" "-r 25 -vf scale=720:576,setdar=4/3,setfield=bff -c:v dvvideo -pix_fmt yuv420p -b 25000k -f mxf"
+fate-lavf-mxf: CMD = lavf_container_timecode "-af aresample=48000:tsf=s16p -bf 2 -threads 1"
+fate-lavf-mxf_d10: CMD = lavf_container "-af aresample=48000:tsf=s16p -ac 2" "-r 25 -vf scale=720:576,pad=720:608:0:32,setfield=tff -c:v mpeg2video -g 0 -flags +ildct+low_delay -dc 10 -non_linear_quant 1 -intra_vlc 1 -qscale 1 -ps 1 -qmin 1 -rc_max_vbv_use 1 -rc_min_vbv_use 1 -pix_fmt yuv422p -minrate 30000k -maxrate 30000k -b 30000k -bufsize 1200000 -rc_init_occupancy 1200000 -qmax 12 -f mxf_d10"
+fate-lavf-mxf_dv25: CMD = lavf_container "-af aresample=48000:tsf=s16p -ac 2" "-r 25 -vf scale=720:576,setdar=4/3,setfield=bff -c:v dvvideo -pix_fmt yuv420p -b 25000k -f mxf"
fate-lavf-mxf_dvcpro50: CMD = lavf_container "-ar 48000 -ac 2" "-r 25 -vf scale=720:576,setdar=16/9,setfield=bff -c:v dvvideo -pix_fmt yuv422p -b 50000k -f mxf"
fate-lavf-mxf_dvcpro100: CMD = lavf_container "-ar 48000 -ac 2" "-r 25 -vf scale=1440:1080,setdar=16/9,setfield=bff -c:v dvvideo -pix_fmt yuv422p -b 100000k -f mxf"
fate-lavf-mxf_ffv1: CMD = lavf_container "-an" "-r 25 -vf scale=720:576,setdar=4/3 -c:v ffv1 -level 3 -pix_fmt yuv420p -f mxf"
--
2.17.1
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [FFmpeg-devel] [PATCH] libswresample/swresample: avoid s16p internal transfer format
2023-09-23 21:02 [FFmpeg-devel] [PATCH] libswresample/swresample: avoid s16p internal transfer format Michael Niedermayer
@ 2023-09-23 21:32 ` Paul B Mahol
2023-09-24 18:48 ` Michael Niedermayer
0 siblings, 1 reply; 3+ messages in thread
From: Paul B Mahol @ 2023-09-23 21:32 UTC (permalink / raw)
To: Michael Niedermayer; +Cc: FFmpeg development discussions and patches
On Sat, Sep 23, 2023 at 11:02 PM Michael Niedermayer <michael@niedermayer.cc>
wrote:
> From: Paul B Mahol <onemda@gmail.com>
>
> Instead use float one by default for sample rate conversions.
> The s16p internal transfer format produces visible and hearable
> quantization artifacts.
>
> Signed-off-by: Paul B Mahol <onemda@gmail.com>
>
> for S8 we continue to use S16 as it should have enough precision
> Fate is adjusted so bitexactness is maintained between mips/arm/x86
> if more tests became bit-inexact on some platform, the same change
> can be done to them
>
> The use of higher precision and float intermediates inevitably
> leads to more differences between platforms.
>
Could add S64 precision path, but would be slower than float, probably.
LGTM.
>
> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
> ---
> libswresample/swresample.c | 8 +++++++-
> tests/fate/acodec.mak | 8 ++++----
> tests/fate/lavf-container.mak | 16 ++++++++--------
> 3 files changed, 19 insertions(+), 13 deletions(-)
>
> diff --git a/libswresample/swresample.c b/libswresample/swresample.c
> index fb3d7bccbf1..f2a9b404743 100644
> --- a/libswresample/swresample.c
> +++ b/libswresample/swresample.c
> @@ -331,8 +331,14 @@ av_cold int swr_init(struct SwrContext *s){
> s->rematrix_custom;
>
> if(s->int_sample_fmt == AV_SAMPLE_FMT_NONE){
> + // 16bit or less to 16bit or less with the same sample rate
> if( av_get_bytes_per_sample(s-> in_sample_fmt) <= 2
> - && av_get_bytes_per_sample(s->out_sample_fmt) <= 2){
> + && av_get_bytes_per_sample(s->out_sample_fmt) <= 2
> + && s->out_sample_rate==s->in_sample_rate) {
> + s->int_sample_fmt= AV_SAMPLE_FMT_S16P;
> + // 8 -> 8, 16->8, 8->16bit
> + } else if( av_get_bytes_per_sample(s-> in_sample_fmt)
> + +av_get_bytes_per_sample(s->out_sample_fmt) <= 3 ) {
> s->int_sample_fmt= AV_SAMPLE_FMT_S16P;
> }else if( av_get_bytes_per_sample(s-> in_sample_fmt) <= 2
> && !s->rematrix
> diff --git a/tests/fate/acodec.mak b/tests/fate/acodec.mak
> index b15b1dcc205..7b09e3bd63d 100644
> --- a/tests/fate/acodec.mak
> +++ b/tests/fate/acodec.mak
> @@ -156,14 +156,14 @@ fate-acodec-ra144: CMP_SHIFT = -320
> FATE_ACODEC-$(call ENCDEC, ROQ_DPCM, ROQ, ARESAMPLE_FILTER) +=
> fate-acodec-roqaudio
> fate-acodec-roqaudio: FMT = roq
> fate-acodec-roqaudio: CODEC = roq_dpcm
> -fate-acodec-roqaudio: ENCOPTS = -ar 22050
> -fate-acodec-roqaudio: DECOPTS = -ar 44100
> +fate-acodec-roqaudio: ENCOPTS = -af aresample=22050:tsf=s16p
> +fate-acodec-roqaudio: DECOPTS = -af aresample=44100:tsf=s16p
>
> FATE_ACODEC-$(call ENCDEC, S302M, MPEGTS, ARESAMPLE_FILTER) +=
> fate-acodec-s302m
> fate-acodec-s302m: FMT = mpegts
> fate-acodec-s302m: CODEC = s302m
> -fate-acodec-s302m: ENCOPTS = -ar 48000 -strict -2
> -fate-acodec-s302m: DECOPTS = -ar 44100
> +fate-acodec-s302m: ENCOPTS = -af aresample=48000:tsf=s16p -strict -2
> +fate-acodec-s302m: DECOPTS = -af aresample=44100:tsf=s16p
>
> FATE_ACODEC-$(call ENCDEC, WAVPACK, WV, ARESAMPLE_FILTER) +=
> fate-acodec-wavpack
> fate-acodec-wavpack: FMT = wv
> diff --git a/tests/fate/lavf-container.mak b/tests/fate/lavf-container.mak
> index d4a0ac7510f..69330ae3b6f 100644
> --- a/tests/fate/lavf-container.mak
> +++ b/tests/fate/lavf-container.mak
> @@ -39,13 +39,13 @@ $(FATE_LAVF_CONTAINER): $(AREF) $(VREF)
> fate-lavf-asf: CMD = lavf_container "" "-c:a mp2 -ar 44100" "-r 25"
> fate-lavf-avi fate-lavf-nut: CMD = lavf_container "" "-c:a mp2 -ar 44100
> -threads 1"
> fate-lavf-dv: CMD = lavf_container "-ar 48000 -channel_layout stereo"
> "-r 25 -s pal"
> -fate-lavf-dv_pal: CMD = lavf_container_timecode_nodrop "-ar 48000 -r 25
> -s pal -ac 2 -f dv"
> -fate-lavf-dv_ntsc: CMD = lavf_container_timecode_drop "-ar 48000
> -pix_fmt yuv411p -s ntsc -ac 2 -f dv"
> +fate-lavf-dv_pal: CMD = lavf_container_timecode_nodrop "-af
> aresample=48000:tsf=s16p -r 25 -s pal -ac 2 -f dv"
> +fate-lavf-dv_ntsc: CMD = lavf_container_timecode_drop "-af
> aresample=48000:tsf=s16p -pix_fmt yuv411p -s ntsc -ac 2 -f dv"
> fate-lavf-flv fate-lavf-swf: CMD = lavf_container "" "-an"
> fate-lavf-flm: CMD = lavf_container "" "-pix_fmt rgba"
> -fate-lavf-gxf: CMD = lavf_container "-ar 48000" "-r 25 -s pal -ac 1
> -threads 1"
> -fate-lavf-gxf_pal: CMD = lavf_container_timecode_nodrop "-ar 48000 -r 25
> -s pal -ac 1 -threads 1 -f gxf"
> -fate-lavf-gxf_ntsc: CMD = lavf_container_timecode_drop "-ar 48000 -s ntsc
> -ac 1 -threads 1 -f gxf"
> +fate-lavf-gxf: CMD = lavf_container "-af aresample=48000:tsf=s16p" "-r 25
> -s pal -ac 1 -threads 1"
> +fate-lavf-gxf_pal: CMD = lavf_container_timecode_nodrop "-af
> aresample=48000:tsf=s16p -r 25 -s pal -ac 1 -threads 1 -f gxf"
> +fate-lavf-gxf_ntsc: CMD = lavf_container_timecode_drop "-af
> aresample=48000:tsf=s16p -s ntsc -ac 1 -threads 1 -f gxf"
> fate-lavf-ismv: CMD = lavf_container_timecode "-an -write_tmcd 1 -c:v
> mpeg4 -threads 1"
> fate-lavf-mkv: CMD = lavf_container "" "-c:a mp2 -c:v mpeg4 -ar 44100
> -threads 1"
> fate-lavf-mkv_attachment: CMD = lavf_container_attach "-c:a mp2 -c:v
> mpeg4 -threads 1 -f matroska"
> @@ -53,9 +53,9 @@ fate-lavf-mov: CMD = lavf_container_timecode "-movflags
> +faststart -c:a pcm_alaw
> fate-lavf-mov_rtphint: CMD = lavf_container "" "-movflags +rtphint -c:a
> pcm_alaw -c:v mpeg4 -threads 1 -f mov"
> fate-lavf-mp4: CMD = lavf_container_timecode "-c:v mpeg4 -an -threads 1"
> fate-lavf-mpg: CMD = lavf_container_timecode "-ar 44100 -threads 1"
> -fate-lavf-mxf: CMD = lavf_container_timecode "-ar 48000 -bf 2 -threads 1"
> -fate-lavf-mxf_d10: CMD = lavf_container "-ar 48000 -ac 2" "-r 25 -vf
> scale=720:576,pad=720:608:0:32,setfield=tff -c:v mpeg2video -g 0 -flags
> +ildct+low_delay -dc 10 -non_linear_quant 1 -intra_vlc 1 -qscale 1 -ps 1
> -qmin 1 -rc_max_vbv_use 1 -rc_min_vbv_use 1 -pix_fmt yuv422p -minrate
> 30000k -maxrate 30000k -b 30000k -bufsize 1200000 -rc_init_occupancy
> 1200000 -qmax 12 -f mxf_d10"
> -fate-lavf-mxf_dv25: CMD = lavf_container "-ar 48000 -ac 2" "-r 25 -vf
> scale=720:576,setdar=4/3,setfield=bff -c:v dvvideo -pix_fmt yuv420p -b
> 25000k -f mxf"
> +fate-lavf-mxf: CMD = lavf_container_timecode "-af
> aresample=48000:tsf=s16p -bf 2 -threads 1"
> +fate-lavf-mxf_d10: CMD = lavf_container "-af aresample=48000:tsf=s16p -ac
> 2" "-r 25 -vf scale=720:576,pad=720:608:0:32,setfield=tff -c:v mpeg2video
> -g 0 -flags +ildct+low_delay -dc 10 -non_linear_quant 1 -intra_vlc 1
> -qscale 1 -ps 1 -qmin 1 -rc_max_vbv_use 1 -rc_min_vbv_use 1 -pix_fmt
> yuv422p -minrate 30000k -maxrate 30000k -b 30000k -bufsize 1200000
> -rc_init_occupancy 1200000 -qmax 12 -f mxf_d10"
> +fate-lavf-mxf_dv25: CMD = lavf_container "-af aresample=48000:tsf=s16p
> -ac 2" "-r 25 -vf scale=720:576,setdar=4/3,setfield=bff -c:v dvvideo
> -pix_fmt yuv420p -b 25000k -f mxf"
> fate-lavf-mxf_dvcpro50: CMD = lavf_container "-ar 48000 -ac 2" "-r 25 -vf
> scale=720:576,setdar=16/9,setfield=bff -c:v dvvideo -pix_fmt yuv422p -b
> 50000k -f mxf"
> fate-lavf-mxf_dvcpro100: CMD = lavf_container "-ar 48000 -ac 2" "-r 25
> -vf scale=1440:1080,setdar=16/9,setfield=bff -c:v dvvideo -pix_fmt yuv422p
> -b 100000k -f mxf"
> fate-lavf-mxf_ffv1: CMD = lavf_container "-an" "-r 25 -vf
> scale=720:576,setdar=4/3 -c:v ffv1 -level 3 -pix_fmt yuv420p -f mxf"
> --
> 2.17.1
>
>
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [FFmpeg-devel] [PATCH] libswresample/swresample: avoid s16p internal transfer format
2023-09-23 21:32 ` Paul B Mahol
@ 2023-09-24 18:48 ` Michael Niedermayer
0 siblings, 0 replies; 3+ messages in thread
From: Michael Niedermayer @ 2023-09-24 18:48 UTC (permalink / raw)
To: FFmpeg development discussions and patches
[-- Attachment #1.1: Type: text/plain, Size: 1311 bytes --]
On Sat, Sep 23, 2023 at 11:32:28PM +0200, Paul B Mahol wrote:
> On Sat, Sep 23, 2023 at 11:02 PM Michael Niedermayer <michael@niedermayer.cc>
> wrote:
>
> > From: Paul B Mahol <onemda@gmail.com>
> >
> > Instead use float one by default for sample rate conversions.
> > The s16p internal transfer format produces visible and hearable
> > quantization artifacts.
> >
> > Signed-off-by: Paul B Mahol <onemda@gmail.com>
> >
> > for S8 we continue to use S16 as it should have enough precision
> > Fate is adjusted so bitexactness is maintained between mips/arm/x86
> > if more tests became bit-inexact on some platform, the same change
> > can be done to them
> >
> > The use of higher precision and float intermediates inevitably
> > leads to more differences between platforms.
> >
>
> Could add S64 precision path, but would be slower than float, probably.
> LGTM.
will apply later without 2 lines (bugs noticed on rerunning with distclean)
thx
[...]
--
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
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terrorist. Also, you are 2.5 times more likely to become a president and
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attack." -- Thoughty2
[-- Attachment #1.2: signature.asc --]
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end of thread, other threads:[~2023-09-24 18:48 UTC | newest]
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2023-09-23 21:02 [FFmpeg-devel] [PATCH] libswresample/swresample: avoid s16p internal transfer format Michael Niedermayer
2023-09-23 21:32 ` Paul B Mahol
2023-09-24 18:48 ` Michael Niedermayer
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