forked from marfrit/libva-v4l2-request-fourier
test0r
565f5c0de4
Commit 3 of the upstreamable plan (upstreamable_design.md §1, §5).
Replaces the prior per-surface OUTPUT-buffer ownership model with a
small driver-wide pool sized by codec pipeline depth (4 H.264 frames
in flight), allocated unconditionally regardless of caller's
num_render_targets.
Prior art (kernel UAPI dev-stateless-decoder.rst, ffmpeg
v4l2_request.c, Chromium V4L2StatelessVideoDecoder, GStreamer
v4l2slh264dec) all decouple OUTPUT and CAPTURE pool sizing. fourier's
"output_count == surfaces_count" model was a category error: OUTPUT
buffers are request-time bitstream slots, CAPTURE buffers are
picture-time DPB slots; their lifecycles and sizing are independent.
Changes:
* NEW src/request_pool.{c,h} (~200 LoC):
- request_pool_init(): CREATE_BUFS + per-slot QUERYBUF + mmap.
- request_pool_destroy(): munmap all, idempotent.
- request_pool_acquire(): round-robin claim; returns V4L2 buffer
index of an unused slot or -1.
- request_pool_release(): mark slot free for reuse.
- request_pool_slot(): accessor for ptr/size given a buffer index.
* src/request.h: add struct request_pool output_pool to request_data.
* src/context.c::RequestCreateContext: replace the per-surface
OUTPUT loop with a single request_pool_init() call (count=4,
independent of surfaces_count). Drop the now-unused locals
(length, offset, source_data, output_buffers_count, index,
index_base, i, surface_object). DELETES patch 0002's
"output_buffers_count = ... ? ... : 4" hack inline — the pool's
own count parameter supersedes it.
* src/picture.c::RequestBeginPicture: borrow a pool slot at frame
start, write its mmap pointer/size/index into the surface's
transient source_* fields. The fields stay (still useful as
a borrow handle that the existing codec_store_buffer memcpys
target), but no longer represent surface-permanent ownership.
Reset slices_size/slices_count here too (was implicit on first
Render).
* src/surface.c::RequestSyncSurface: after VIDIOC_DQBUF returns
the OUTPUT buffer, release the pool slot and clear the surface's
borrow handle. Fixes the segv on second-frame submission.
* src/surface.c::RequestDestroySurfaces: remove the munmap of
source_data — pool owns the mmap.
* src/request.c::RequestTerminate: call request_pool_destroy()
before close(video_fd) so munmaps still target a valid fd.
* src/meson.build: add request_pool.c and request_pool.h to the
sources/headers lists.
This commit removes 0002's OUTPUT-pool hack inline (the
"floor to 4" line is gone). The DECODE_MODE/START_CODE block in 0002
remains until commit 4 lands.
Build-verified clean on aarch64.
Signed-off-by: Markus Fritsche <fritsche.markus@gmail.com>
72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
/*
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* Copyright (C) 2007 Intel Corporation
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* Copyright (C) 2016 Florent Revest <florent.revest@free-electrons.com>
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* Copyright (C) 2018 Paul Kocialkowski <paul.kocialkowski@bootlin.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef _V4L2_REQUEST_H_
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#define _V4L2_REQUEST_H_
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#include <stdbool.h>
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#include "context.h"
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#include "object_heap.h"
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#include "request_pool.h"
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#include "video.h"
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#include <va/va.h>
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#include <linux/videodev2.h>
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#define V4L2_REQUEST_STR_VENDOR "v4l2-request"
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#define V4L2_REQUEST_MAX_PROFILES 11
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#define V4L2_REQUEST_MAX_ENTRYPOINTS 5
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#define V4L2_REQUEST_MAX_CONFIG_ATTRIBUTES 10
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#define V4L2_REQUEST_MAX_IMAGE_FORMATS 10
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#define V4L2_REQUEST_MAX_SUBPIC_FORMATS 4
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#define V4L2_REQUEST_MAX_DISPLAY_ATTRIBUTES 4
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struct request_data {
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struct object_heap config_heap;
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struct object_heap context_heap;
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struct object_heap surface_heap;
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struct object_heap buffer_heap;
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struct object_heap image_heap;
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int video_fd;
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int media_fd;
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struct video_format *video_format;
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/*
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* OUTPUT (bitstream-input) buffer pool, decoupled from VA
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* surfaces. Sized by codec pipeline depth, populated on first
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* RequestCreateContext, torn down at driver Terminate.
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*/
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struct request_pool output_pool;
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};
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VAStatus VA_DRIVER_INIT_FUNC(VADriverContextP context);
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VAStatus RequestTerminate(VADriverContextP context);
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#endif
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