On Tue, Dec 6, 2022 at 12:02 AM Timo Rothenpieler <t...@rothenpieler.org>
wrote:
> On 05.12.2022 15:15, Andreas Rheinhardt wrote:
> > Timo Rothenpieler:
> >> In my tests, this lead to a notable speed increase with the amount
> >> of threads used. Decoding a 720p sample gave the following results:
> >>
> >> 1 Thread: 1428 FPS
> >> 2 Threads: 2501 FPS
> >> 8 Threads: 7575 FPS
> >> Automatic: 11326 FPS (On a 16 Core/32 Threads system)
> >> ---
> >> libavcodec/jpeglsdec.c | 2 +-
> >> libavcodec/mjpegdec.c | 13 +++++++------
> >> libavcodec/sp5xdec.c | 4 ++--
> >> 3 files changed, 10 insertions(+), 9 deletions(-)
> >>
>
I made almost same patch, can you apply this one?
Thanks.
> >> diff --git a/libavcodec/jpeglsdec.c b/libavcodec/jpeglsdec.c
> >> index 2e6d018ea6..c0642e8e30 100644
> >> --- a/libavcodec/jpeglsdec.c
> >> +++ b/libavcodec/jpeglsdec.c
> >> @@ -559,7 +559,7 @@ const FFCodec ff_jpegls_decoder = {
> >> .init = ff_mjpeg_decode_init,
> >> .close = ff_mjpeg_decode_end,
> >> FF_CODEC_RECEIVE_FRAME_CB(ff_mjpeg_receive_frame),
> >> - .p.capabilities = AV_CODEC_CAP_DR1,
> >> + .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
> >> .caps_internal = FF_CODEC_CAP_INIT_CLEANUP |
> >> FF_CODEC_CAP_SETS_PKT_DTS,
> >> };
> >> diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c
> >> index 9b7465abe7..d30d722398 100644
> >> --- a/libavcodec/mjpegdec.c
> >> +++ b/libavcodec/mjpegdec.c
> >> @@ -54,6 +54,7 @@
> >> #include "exif.h"
> >> #include "bytestream.h"
> >> #include "tiff_common.h"
> >> +#include "thread.h"
> >>
> >>
> >> static int init_default_huffman_tables(MJpegDecodeContext *s)
> >> @@ -713,7 +714,7 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
> >> s->avctx->pix_fmt,
> >> AV_PIX_FMT_NONE,
> >> };
> >> - s->hwaccel_pix_fmt = ff_get_format(s->avctx, pix_fmts);
> >> + s->hwaccel_pix_fmt = ff_thread_get_format(s->avctx,
> pix_fmts);
> >> if (s->hwaccel_pix_fmt < 0)
> >> return AVERROR(EINVAL);
> >>
> >> @@ -729,7 +730,7 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
> >> }
> >>
> >> av_frame_unref(s->picture_ptr);
> >> - if (ff_get_buffer(s->avctx, s->picture_ptr,
> AV_GET_BUFFER_FLAG_REF) < 0)
> >> + if (ff_thread_get_buffer(s->avctx, s->picture_ptr,
> AV_GET_BUFFER_FLAG_REF) < 0)
> >> return -1;
> >> s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
> >> s->picture_ptr->key_frame = 1;
> >> @@ -2388,7 +2389,7 @@ static int mjpeg_get_packet(AVCodecContext *avctx)
> >> int ret;
> >>
> >> av_packet_unref(s->pkt);
> >> - ret = ff_decode_get_packet(avctx, s->pkt);
> >> + ret = ff_thread_decode_get_packet(avctx, s->pkt);
> >> if (ret < 0)
> >> return ret;
> >>
> >> @@ -3020,7 +3021,7 @@ const FFCodec ff_mjpeg_decoder = {
> >> .close = ff_mjpeg_decode_end,
> >> FF_CODEC_RECEIVE_FRAME_CB(ff_mjpeg_receive_frame),
> >> .flush = decode_flush,
> >> - .p.capabilities = AV_CODEC_CAP_DR1,
> >> + .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
> >> .p.max_lowres = 3,
> >> .p.priv_class = &mjpegdec_class,
> >> .p.profiles = NULL_IF_CONFIG_SMALL(ff_mjpeg_profiles),
> >> @@ -3050,7 +3051,7 @@ const FFCodec ff_thp_decoder = {
> >> .close = ff_mjpeg_decode_end,
> >> FF_CODEC_RECEIVE_FRAME_CB(ff_mjpeg_receive_frame),
> >> .flush = decode_flush,
> >> - .p.capabilities = AV_CODEC_CAP_DR1,
> >> + .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
> >> .p.max_lowres = 3,
> >> .caps_internal = FF_CODEC_CAP_INIT_CLEANUP |
> >> FF_CODEC_CAP_SETS_PKT_DTS,
> >> @@ -3068,7 +3069,7 @@ const FFCodec ff_smvjpeg_decoder = {
> >> .close = ff_mjpeg_decode_end,
> >> FF_CODEC_RECEIVE_FRAME_CB(ff_mjpeg_receive_frame),
> >> .flush = decode_flush,
> >> - .p.capabilities = AV_CODEC_CAP_DR1,
> >> + .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
> >> .caps_internal = FF_CODEC_CAP_EXPORTS_CROPPING |
> >> FF_CODEC_CAP_SETS_PKT_DTS |
> FF_CODEC_CAP_INIT_CLEANUP,
> >> };
> >> diff --git a/libavcodec/sp5xdec.c b/libavcodec/sp5xdec.c
> >> index 394448c5a9..8b08dc672a 100644
> >> --- a/libavcodec/sp5xdec.c
> >> +++ b/libavcodec/sp5xdec.c
> >> @@ -101,7 +101,7 @@ const FFCodec ff_sp5x_decoder = {
> >> .init = ff_mjpeg_decode_init,
> >> .close = ff_mjpeg_decode_end,
> >> FF_CODEC_RECEIVE_FRAME_CB(ff_mjpeg_receive_frame),
> >> - .p.capabilities = AV_CODEC_CAP_DR1,
> >> + .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
> >> .p.max_lowres = 3,
> >> .caps_internal = FF_CODEC_CAP_INIT_CLEANUP |
> >> FF_CODEC_CAP_SETS_PKT_DTS,
> >> @@ -118,7 +118,7 @@ const FFCodec ff_amv_decoder = {
> >> .close = ff_mjpeg_decode_end,
> >> FF_CODEC_RECEIVE_FRAME_CB(ff_mjpeg_receive_frame),
> >> .p.max_lowres = 3,
> >> - .p.capabilities = AV_CODEC_CAP_DR1,
> >> + .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
> >> .caps_internal = FF_CODEC_CAP_INIT_CLEANUP |
> >> FF_CODEC_CAP_SETS_PKT_DTS,
> >> };
> >
> > Can you test the sample that Michael mentioned here:
> >
> https://patchwork.ffmpeg.org/project/ffmpeg/patch/as8pr01mb7944e105be990a5d01ef89208f...@as8pr01mb7944.eurprd01.prod.exchangelabs.com/
> ?
> > (I never got around to analyzing this, but if I am not mistaken, it
> > shows that this decoder is not a simple one-in, one-out decoder, so that
> > making it multithreaded will be more complicated than just adding the
> > flag and using ff_thread_get_buffer/format.)
>
> Assuming this is the right file:
> https://trac.ffmpeg.org/attachment/ticket/1915/not_interleaved.avi
>
> It does not decode for me at all, with or without this patch applied:
>
> > [mjpeg @ 0x562e81877c80] No JPEG data found in image
> > Error while decoding stream #0:0: Invalid data found when processing
> input
>
>
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