From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: Re: [FFmpeg-devel] [PATCH v2 43/71] avcodec/mpegpicture: Split MPVPicture into WorkPicture and ordinary Pic
Date: Mon, 24 Jun 2024 00:28:28 +0200
Message-ID: <20240623222828.GB4991@pb2> (raw)
In-Reply-To: <GV1P250MB0737DA1DAF804D61B11FE5948FE02@GV1P250MB0737.EURP250.PROD.OUTLOOK.COM>
[-- Attachment #1.1: Type: text/plain, Size: 12086 bytes --]
On Sat, May 11, 2024 at 10:51:07PM +0200, Andreas Rheinhardt wrote:
> There are two types of MPVPictures: Three (cur_pic, last_pic, next_pic)
> that are directly part of MpegEncContext and an array of MPVPictures
> that are separately allocated and are mostly accessed via pointers
> (cur|last|next)_pic_ptr; they are also used to store AVFrames in the
> encoder (necessary due to B-frames). As the name implies, each of the
> former is directly associated with one of the _ptr pointers:
> They actually share the same underlying buffers, but the ones
> that are part of the context can have their data pointers offset
> and their linesize doubled for field pictures.
>
> Up until now, each of these had their own references; in particular,
> there was an underlying av_frame_ref() to sync cur_pic and cur_pic_ptr
> etc. This is wasteful.
>
> This commit changes this relationship: cur_pic, last_pic and next_pic
> now become MPVWorkPictures; this structure does not have an AVFrame
> at all any more, but only the cached values of data and linesize.
> It also contains a pointer to the corresponding MPVPicture, establishing
> a more natural relationsship between the two.
> This already means that creating the context-pictures from the pointers
> can no longer fail.
>
> What has not been changed is the fact that the MPVPicture* pointers
> are not ownership pointers and that the MPVPictures are part of an
> array of MPVPictures that is owned by a single AVCodecContext.
> Doing so will be done in a latter commit.
>
> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
> ---
> libavcodec/d3d12va_mpeg2.c | 10 +-
> libavcodec/d3d12va_vc1.c | 10 +-
> libavcodec/dxva2_mpeg2.c | 16 +--
> libavcodec/dxva2_vc1.c | 20 ++--
> libavcodec/h261dec.c | 7 +-
> libavcodec/h263dec.c | 33 +++---
> libavcodec/ituh263dec.c | 4 +-
> libavcodec/mpeg12dec.c | 56 ++++-----
> libavcodec/mpeg12enc.c | 14 +--
> libavcodec/mpeg4videodec.c | 4 +-
> libavcodec/mpeg4videoenc.c | 4 +-
> libavcodec/mpeg_er.c | 6 +-
> libavcodec/mpegpicture.c | 56 ++++++---
> libavcodec/mpegpicture.h | 30 ++++-
> libavcodec/mpegvideo.c | 11 --
> libavcodec/mpegvideo.h | 9 +-
> libavcodec/mpegvideo_dec.c | 143 +++++++++--------------
> libavcodec/mpegvideo_enc.c | 99 ++++++----------
> libavcodec/mpegvideo_motion.c | 8 +-
> libavcodec/mpv_reconstruct_mb_template.c | 4 +-
> libavcodec/mss2.c | 2 +-
> libavcodec/nvdec_mpeg12.c | 6 +-
> libavcodec/nvdec_mpeg4.c | 6 +-
> libavcodec/nvdec_vc1.c | 6 +-
> libavcodec/ratecontrol.c | 10 +-
> libavcodec/rv10.c | 28 ++---
> libavcodec/rv34.c | 38 +++---
> libavcodec/snowenc.c | 17 +--
> libavcodec/svq1enc.c | 5 +-
> libavcodec/vaapi_mpeg2.c | 12 +-
> libavcodec/vaapi_mpeg4.c | 14 +--
> libavcodec/vaapi_vc1.c | 14 ++-
> libavcodec/vc1.c | 2 +-
> libavcodec/vc1_block.c | 12 +-
> libavcodec/vc1_mc.c | 14 +--
> libavcodec/vc1_pred.c | 2 +-
> libavcodec/vc1dec.c | 40 +++----
> libavcodec/vdpau.c | 2 +-
> libavcodec/vdpau_mpeg12.c | 8 +-
> libavcodec/vdpau_mpeg4.c | 6 +-
> libavcodec/vdpau_vc1.c | 12 +-
> libavcodec/videotoolbox.c | 2 +-
> libavcodec/wmv2dec.c | 2 +-
> 43 files changed, 386 insertions(+), 418 deletions(-)
[...]
after this the linesize for teh last field picture goes exponential
s->last_pic.linesize[i] *= 2;
libavcodec/mpeg12dec.c:1304:41: runtime error: signed integer overflow: 4611686018427387904 * 2 cannot be represented in type 'long'
issue: 69732/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MPEGVIDEO_fuzzer-5123551179374592
something like this:
L0 40 0x62e0001f8400 0x613000000780
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L2 200000000000000 0x62a000204200 0x613000000780
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L0 4000000000000000 0x62e0001f8400 0x613000000780
[...]
--
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
The greatest way to live with honor in this world is to be what we pretend
to be. -- Socrates
[-- Attachment #1.2: signature.asc --]
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next prev parent reply other threads:[~2024-06-23 22:28 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-11 20:23 [FFmpeg-devel] [PATCH v2 01/71] avcodec/ratecontrol: Fix double free on error Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 02/71] avcodec/ratecontrol: Pass RCContext directly in ff_rate_control_uninit() Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 03/71] avcodec/ratecontrol: Don't call ff_rate_control_uninit() ourselves Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 04/71] avcodec/mpegvideo, ratecontrol: Remove write-only skip_count Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 05/71] avcodec/ratecontrol: Avoid padding in RateControlEntry Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 06/71] avcodec/get_buffer: Remove redundant check Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 07/71] avcodec/mpegpicture: Store linesize in ScratchpadContext Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 08/71] avcodec/mpegvideo_dec: Sync linesize and uvlinesize between threads Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 09/71] avcodec/mpegvideo_dec: Factor allocating dummy frames out Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 10/71] avcodec/mpegpicture: Mark dummy frames as such Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 11/71] avcodec/mpeg12dec: Allocate dummy frames for non-I fields Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 12/71] avcodec/mpegvideo_motion: Remove dead checks for existence of reference Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 13/71] avcodec/mpegvideo_motion: Optimize check away Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 14/71] " Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 15/71] avcodec/mpegvideo_motion: Avoid constant function argument Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 16/71] avcodec/msmpeg4enc: Only calculate coded_cbp when used Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 17/71] avcodec/mpegvideo: Only allocate coded_block when needed Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 18/71] avcodec/mpegvideo: Don't reset coded_block unnecessarily Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 19/71] avcodec/mpegvideo: Only allocate cbp_table, pred_dir_table when needed Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 20/71] avcodec/mpegpicture: Always reset motion val buffer Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 21/71] avcodec/mpegpicture: Always reset mbskip_table Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 22/71] avcodec/mpegvideo: Redo aligning mb_height for VC-1 Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 23/71] avcodec/mpegvideo, mpegpicture: Add buffer pool Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 24/71] avcodec/mpegpicture: Reindent after the previous commit Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 25/71] avcodec/mpegpicture: Use RefStruct-pool API Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 26/71] avcodec/h263: Move encoder-only part out of ff_h263_update_motion_val() Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 27/71] avcodec/h263, mpeg(picture|video): Only allocate mbskip_table for MPEG-4 Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 28/71] avcodec/mpegvideo: Reindent after the previous commit Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 29/71] avcodec/h263: Move setting mbskip_table to decoder/encoders Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 30/71] avcodec/mpegvideo: Restrict resetting mbskip_table to MPEG-4 decoder Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 31/71] avcodec/mpegvideo: Shorten variable names Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 32/71] avcodec/mpegpicture: Reduce value of MAX_PLANES define Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 33/71] avcodec/mpegpicture: Cache AVFrame.data and linesize values Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 34/71] avcodec/rv30, rv34, rv40: Avoid indirection Andreas Rheinhardt
2024-05-11 20:50 ` [FFmpeg-devel] [PATCH v2 35/71] avcodec/mpegvideo: Add const where appropriate Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 36/71] avcodec/vc1_pred: Remove unused function parameter Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 37/71] avcodec/mpegpicture: Improve error messages and code Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 38/71] avcodec/mpegpicture: Split ff_alloc_picture() into check and alloc part Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 39/71] avcodec/mpegvideo_enc: Pass AVFrame*, not Picture* to alloc_picture() Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 40/71] avcodec/mpegvideo_enc: Move copying properties " Andreas Rheinhardt
2024-05-12 19:55 ` Michael Niedermayer
2024-06-08 14:03 ` [FFmpeg-devel] [PATCH v3 " Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 41/71] avcodec/mpegpicture: Rename Picture->MPVPicture Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 42/71] avcodec/vc1_mc: Don't check AVFrame INTERLACE flags Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 43/71] avcodec/mpegpicture: Split MPVPicture into WorkPicture and ordinary Pic Andreas Rheinhardt
2024-06-23 22:28 ` Michael Niedermayer [this message]
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 44/71] avcodec/error_resilience: Deduplicate cleanup code Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 45/71] avcodec/mpegvideo_enc: Factor setting length of B frame chain out Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 46/71] avcodec/mpegvideo_enc: Return early when getting length of B frame chain Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 47/71] avcodec/mpegvideo_enc: Reindentation Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 48/71] avcodec/mpeg12dec: Don't initialize inter tables for IPU Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 49/71] avcodec/mpeg12dec: Only initialize IDCT " Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 50/71] avcodec/mpeg12dec: Remove write-only assignment Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 51/71] avcodec/mpeg12dec: Set out_format only once Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 52/71] avformat/riff: Declare VCR2 to be MPEG-2 Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 53/71] avcodec/mpegvideo_dec: Add close function for mpegvideo-decoders Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 54/71] avcodec/mpegpicture: Make MPVPicture refcounted Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 55/71] avcodec/mpeg4videoenc: Avoid branch for writing stuffing Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 56/71] avcodec/mpeg4videoenc: Simplify writing startcodes Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 57/71] avcodec/mpegpicture: Use ThreadProgress instead of ThreadFrame API Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 58/71] avcodec/mpegpicture: Avoid loop and branch when setting motion_val Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 59/71] avcodec/mpegpicture: Use union for b_scratchpad and rd_scratchpad Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 60/71] avcodec/mpegpicture: Avoid MotionEstContext in ff_mpeg_framesize_alloc() Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 61/71] avcodec/mpegvideo_enc: Unify initializing PutBitContexts Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 62/71] avcodec/mpeg12enc: Simplify writing startcodes Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 63/71] avcodec/mpegvideo_dec, rv34: Simplify check for "does pic exist?" Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 64/71] avcodec/mpegvideo_dec: Don't sync encoder-only coded_picture_number Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 65/71] avcodec/mpeg12dec: Pass Mpeg1Context* in mpeg_field_start() Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 66/71] avcodec/mpeg12dec: Don't initialize inter_scantable Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 67/71] avcodec/mpegvideo: Remove pblocks Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 68/71] avcodec/mpegvideo: Use enum for msmpeg4_version Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 69/71] avcodec/ituh263enc: Remove redundant check Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 70/71] avcodec/mpegvideo_enc: Binarize reference Andreas Rheinhardt
2024-05-11 20:51 ` [FFmpeg-devel] [PATCH v2 71/71] avcodec/vc1_pred: Fix indentation Andreas Rheinhardt
2024-06-11 20:59 ` [FFmpeg-devel] [PATCH v2 01/71] avcodec/ratecontrol: Fix double free on error Andreas Rheinhardt
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