** fbtile cpu based framebuffer tile/detile helpers
Add helper routines which can be used to tile/detile framebuffer
layouts between linear and specified tile layout, using the cpu.
Currently it supports Legacy Intel Tile-X, Legacy Intel Tile-Y and
Newer Intel Tile-Yf tiled layouts.
Currently supported pixel format is 32bit RGB.
It also contains fbtile_generic logic, which can be easily configured
to support different kinds of tiling layouts, at the expense of some
additional processing cycles, compared to developing custom (de)tiling
logic. One requires to provide the tile walking parameters for the
new tile layout to be supported. Once it is done, both tiling and
detiling of the new tile layout can be handled automatically.
This is non-public by default.
** hwcontext_drm detile non linear layout, if possible
If the framebuffer is a tiled layout, use the fbtile helper routines
to try and detile it into linear layout, if supported by fbtile.
It uses the format_modifier associated with the framebuffer to decide
whether to apply detiling or not and inturn which specific detiling
to apply.
If user is using kmsgrab, they will have to use -format_modifer option
of kmsgrab to force a specific detile logic, in case they dont want to
use the original format_modifier related detiling. Or they could even
use -format_modifier 0 to make hwcontext_drm bypass this detiling.
---
Changelog | 2 +
libavutil/Makefile | 2 +
libavutil/fbtile.c | 434 ++++++++++++++++++++++++++++++++++++++
libavutil/fbtile.h | 255 ++++++++++++++++++++++
libavutil/hwcontext_drm.c | 36 +++-
5 files changed, 728 insertions(+), 1 deletion(-)
create mode 100644 libavutil/fbtile.c
create mode 100644 libavutil/fbtile.h
diff --git a/Changelog b/Changelog
index ac3f1cf208..c25a28a428 100644
--- a/Changelog
+++ b/Changelog
@@ -2,6 +2,8 @@ Entries are sorted chronologically from oldest to youngest
within each release,
releases are sorted from youngest to oldest.
version <next>:
+- hwcontext_drm detiles non linear layouts, if possible
+- fbtile cpu based framebuffer tile/detile helpers
- kmsgrab GetFB2 format_modifier, if user doesnt specify
- AudioToolbox output device
- MacCaption demuxer
diff --git a/libavutil/Makefile b/libavutil/Makefile
index 9b08372eb2..9b58ac5980 100644
--- a/libavutil/Makefile
+++ b/libavutil/Makefile
@@ -84,6 +84,7 @@ HEADERS = adler32.h
\
xtea.h \
tea.h \
tx.h \
+ fbtile.h \
HEADERS-$(CONFIG_LZO) += lzo.h
@@ -169,6 +170,7 @@ OBJS = adler32.o
\
tx_float.o \
tx_double.o \
tx_int32.o \
+ fbtile.o \
video_enc_params.o \
diff --git a/libavutil/fbtile.c b/libavutil/fbtile.c
new file mode 100644
index 0000000000..921e5de805
--- /dev/null
+++ b/libavutil/fbtile.c
@@ -0,0 +1,434 @@
+/*
+ * CPU based Framebuffer Generic Tile DeTile logic
+ * Copyright (c) 2020 C Hanish Menon <HanishKVC>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+#include "avutil.h"
+#include "common.h"
+#include "fbtile.h"
+#if CONFIG_LIBDRM
+#include <drm_fourcc.h>
+#endif
+
+
+SCOPEIN enum FBTileLayout fbtilelayoutid_from_drmformatmodifier(uint64_t
formatModifier)
+{
+ enum FBTileLayout layout = FBTILE_UNKNOWN;
+
+#if CONFIG_LIBDRM
+ switch(formatModifier) {
+ case DRM_FORMAT_MOD_LINEAR:
+ layout = FBTILE_NONE;
+ break;
+ case I915_FORMAT_MOD_X_TILED:
+ layout = FBTILE_INTEL_XGEN9;
+ break;
+ case I915_FORMAT_MOD_Y_TILED:
+ layout = FBTILE_INTEL_YGEN9;
+ break;
+ case I915_FORMAT_MOD_Yf_TILED:
+ layout = FBTILE_INTEL_YF;
+ break;
+ default:
+ layout = FBTILE_UNKNOWN;
+ break;
+ }
+#endif
+#ifdef DEBUG_FBTILE_FORMATMODIFIER_MAPPING
+ av_log(NULL, AV_LOG_DEBUG, "fbtile:drmformatmodifier[%lx] mapped to
layout[%d]\n", formatModifier, layout);
+#endif
+ return layout;
+}
+
+
+/**
+ * Supported pixel formats
+ * Currently only RGB based 32bit formats are specified
+ * TODO: Technically the logic is transparent to 16bit RGB formats also to a
great extent
+ */
+SCOPEIN const enum AVPixelFormat fbtilePixFormats[] = {
+ AV_PIX_FMT_RGB0, AV_PIX_FMT_0RGB,
AV_PIX_FMT_BGR0, AV_PIX_FMT_0BGR,
+ AV_PIX_FMT_RGBA, AV_PIX_FMT_ARGB,
AV_PIX_FMT_BGRA, AV_PIX_FMT_ABGR,
+ AV_PIX_FMT_NONE};
+
+SCOPEIN int fbtile_checkpixformats(const enum AVPixelFormat srcPixFormat,
const enum AVPixelFormat dstPixFormat)
+{
+ int errSrc = 1;
+ int errDst = 1;
+ for (int i = 0; fbtilePixFormats[i] != AV_PIX_FMT_NONE; i++) {
+ if (fbtilePixFormats[i] == srcPixFormat)
+ errSrc = 0;
+ if (fbtilePixFormats[i] == dstPixFormat)
+ errDst = 0;
+ }
+ return (errSrc | errDst);
+}
+
+
+/*
+ * Generic tile/detile logic
+ * The tile layout data is assumed to be tightly packed, with no gaps
inbetween.
+ * However the logic does try to accomodate a src/dst linear layout memory,
+ * where there is possibly some additional bytes beyond the width in each line
+ * of pixel data.
+ */
+
+/**
+ * Settings for Intel Tile-Yf framebuffer layout.
+ * May need to swap the 4 pixel wide subtile, have to check doc bit more
+ */
+SCOPEIN struct FBTileWalk tyfTileWalk = {
+ .bytesPerPixel = 4,
+ .subTileWidth = 4, .subTileHeight = 8,
+ .tileWidth = 32, .tileHeight = 32,
+ .numDirChanges = 6,
+ .dirChanges = { {8, 4, 0}, {16, -4, 8}, {32, 4, -8}, {64,
-12, 8}, {128, 4, -24}, {256, 4, -24} }
+ };
+
+/**
+ * Setting for Intel Tile-X framebuffer layout
+ */
+SCOPEIN struct FBTileWalk txTileWalk = {
+ .bytesPerPixel = 4,
+ .subTileWidth = 128, .subTileHeight = 8,
+ .tileWidth = 128, .tileHeight = 8,
+ .numDirChanges = 1,
+ .dirChanges = { {8, 128, 0} }
+ };
+
+/**
+ * Setting for Intel Tile-Y framebuffer layout
+ * Even thou a simple generic detiling logic doesnt require the
+ * dummy 256 posOffset entry. The pseudo parallel detiling based
+ * opti logic requires to know about the Tile boundry.
+ */
+SCOPEIN struct FBTileWalk tyTileWalk = {
+ .bytesPerPixel = 4,
+ .subTileWidth = 4, .subTileHeight = 32,
+ .tileWidth = 32, .tileHeight = 32,
+ .numDirChanges = 2,
+ .dirChanges = { {32, 4, 0}, {256, 4, 0} }
+ };
+
+
+/**
+ * _fbtile_generic_simple tile/detile layout
+ */
+static int _fbtile_generic_simple(enum FBTileOps op,
+ const int w, const int h,
+ uint8_t *dst, const int dstLineSize,
+ uint8_t *src, const int srcLineSize,
+ const int bytesPerPixel,
+ const int subTileWidth, const int
subTileHeight,
+ const int tileWidth, const int tileHeight,
+ const int numDirChanges, const struct
FBTWDirChange *dirChanges)
+{
+ int tO, lO;
+ int lX, lY;
+ int cSTL, nSTLines;
+ uint8_t *tld, *lin;
+ int tldLineSize, linLineSize;
+ const int subTileWidthBytes = subTileWidth*bytesPerPixel;
+
+ if (op == FBTILEOPS_TILE) {
+ lin = src;
+ linLineSize = srcLineSize;
+ tld = dst;
+ tldLineSize = dstLineSize;
+ } else {
+ tld = src;
+ tldLineSize = srcLineSize;
+ lin = dst;
+ linLineSize = dstLineSize;
+ }
+
+ // To keep things sane and simple tile layout is assumed to be tightly
packed,
+ // so below check is a indirect logical assumption, even thou tldLineSize
is not directly mappable at one level
+ if (w*bytesPerPixel != tldLineSize) {
+ av_log(NULL, AV_LOG_ERROR, "fbtile:genericsimp: w%dxh%d, dL%d,
sL%d\n", w, h, tldLineSize, linLineSize);
+ av_log(NULL, AV_LOG_ERROR, "fbtile:genericsimp: dont support
tldLineSize | Pitch going beyond width\n");
+ return FBT_ERR;
+ }
+ tO = 0;
+ lX = 0;
+ lY = 0;
+ nSTLines = (w*h)/subTileWidth; // numSubTileLines
+ cSTL = 0; // curSubTileLine
+ while (cSTL < nSTLines) {
+ lO = lY*linLineSize + lX*bytesPerPixel;
+#ifdef DEBUG_FBTILE
+ av_log(NULL, AV_LOG_DEBUG, "fbtile:genericsimp: lX%d lY%d; lO%d, tO%d;
%d/%d\n", lX, lY, lO, tO, cSTL, nSTLines);
+#endif
+
+ for (int k = 0; k < subTileHeight; k++) {
+ if (op == FBTILEOPS_TILE) {
+ memcpy(tld+tO+k*subTileWidthBytes, lin+lO+k*linLineSize,
subTileWidthBytes);
+ } else {
+ memcpy(lin+lO+k*linLineSize, tld+tO+k*subTileWidthBytes,
subTileWidthBytes);
+ }
+ }
+ tO = tO + subTileHeight*subTileWidthBytes;
+
+ cSTL += subTileHeight;
+ for (int i=numDirChanges-1; i>=0; i--) {
+ if ((cSTL%dirChanges[i].posOffset) == 0) {
+ lX += dirChanges[i].xDelta;
+ lY += dirChanges[i].yDelta;
+ break;
+ }
+ }
+ if (lX >= w) {
+ lX = 0;
+ lY += tileHeight;
+ }
+ }
+ return FBT_OK;
+}
+
+
+SCOPEIN int fbtile_generic_simple(enum FBTileOps op,
+ const int w, const int h,
+ uint8_t *dst, const int dstLineSize,
+ uint8_t *src, const int srcLineSize,
+ const struct FBTileWalk *tw)
+{
+ return _fbtile_generic_simple(op, w, h,
+ dst, dstLineSize, src, srcLineSize,
+ tw->bytesPerPixel,
+ tw->subTileWidth, tw->subTileHeight,
+ tw->tileWidth, tw->tileHeight,
+ tw->numDirChanges, tw->dirChanges);
+}
+
+
+static int _fbtile_generic_opti(enum FBTileOps op,
+ const int w, const int h,
+ uint8_t *dst, const int dstLineSize,
+ uint8_t *src, const int srcLineSize,
+ const int bytesPerPixel,
+ const int subTileWidth, const int
subTileHeight,
+ const int tileWidth, const int tileHeight,
+ const int numDirChanges, const struct
FBTWDirChange *dirChanges)
+{
+ int tO, lO, tOPrev;
+ int lX, lY;
+ int cSTL, nSTLines;
+ int curTileInRow, nTilesInARow;
+ uint8_t *tld, *lin;
+ int tldLineSize, linLineSize;
+ const int subTileWidthBytes = subTileWidth*bytesPerPixel;
+ int parallel = 1;
+
+ if (op == FBTILEOPS_TILE) {
+ lin = src;
+ linLineSize = srcLineSize;
+ tld = dst;
+ tldLineSize = dstLineSize;
+ } else {
+ tld = src;
+ tldLineSize = srcLineSize;
+ lin = dst;
+ linLineSize = dstLineSize;
+ }
+
+ if (w*bytesPerPixel != tldLineSize) {
+ av_log(NULL, AV_LOG_ERROR, "fbtile:genericopti: w%dxh%d, dL%d,
sL%d\n", w, h, linLineSize, tldLineSize);
+ av_log(NULL, AV_LOG_ERROR, "fbtile:genericopti: dont support
tldLineSize | Pitch going beyond width\n");
+ return FBT_ERR;
+ }
+ if (w%tileWidth != 0) {
+ av_log(NULL, AV_LOG_ERROR, "fbtile:genericopti:NotSupported:Width
being non-mult Of TileWidth: width%d, tileWidth%d\n", w, tileWidth);
+ return FBT_ERR;
+ }
+ tO = 0;
+ tOPrev = 0;
+ lX = 0;
+ lY = 0;
+ nTilesInARow = w/tileWidth;
+ for (parallel=8; parallel>0; parallel--) {
+ if (nTilesInARow%parallel == 0)
+ break;
+ }
+ nSTLines = (w*h)/subTileWidth; // numSubTileLines
+ cSTL = 0; // curSubTileLine
+ curTileInRow = 0;
+ while (cSTL < nSTLines) {
+ lO = lY*linLineSize + lX*bytesPerPixel;
+#ifdef DEBUG_FBTILE
+ av_log(NULL, AV_LOG_DEBUG, "fbtile:genericopti: lX%d lY%d; tO%d, lO%d;
%d/%d\n", lX, lY, tO, lO, cSTL, nSTLines);
+#endif
+
+ // As most tiling layouts have a minimum subtile of 4x4, if I remember
correctly,
+ // so this loop can be unrolled to be multiples of 4, and speed up a
bit.
+ // However tiling involving 3x3 or 2x2 wont be handlable. In which one
will have to use
+ // NON UnRolled version or fbtile_generic_simple for such tile layouts.
+ // (De)tile parallely to a limited extent. Gain some speed by allowing
reuse of calcs and parallelism,
+ // but still avoid any cache set-associativity and or limited cache
based thrashing. Keep it spatially
+ // and inturn temporaly small at one level.
+ if (op == FBTILEOPS_DETILE) {
+#ifdef FBTILER_OPTI_UNROLL
+ for (int k = 0; k < subTileHeight; k+=4) {
+#else
+ for (int k = 0; k < subTileHeight; k+=1) {
+#endif
+ for (int p = 0; p < parallel; p++) {
+ int pTldOffset = p*tileWidth*tileHeight*bytesPerPixel;
+ int pLinOffset = p*tileWidth*bytesPerPixel;
+ memcpy(lin+lO+(k+0)*linLineSize+pLinOffset,
tld+tO+(k+0)*subTileWidthBytes+pTldOffset, subTileWidthBytes);
+#ifdef FBTILER_OPTI_UNROLL
+ memcpy(lin+lO+(k+1)*linLineSize+pLinOffset,
tld+tO+(k+1)*subTileWidthBytes+pTldOffset, subTileWidthBytes);
+ memcpy(lin+lO+(k+2)*linLineSize+pLinOffset,
tld+tO+(k+2)*subTileWidthBytes+pTldOffset, subTileWidthBytes);
+ memcpy(lin+lO+(k+3)*linLineSize+pLinOffset,
tld+tO+(k+3)*subTileWidthBytes+pTldOffset, subTileWidthBytes);
+#endif
+ }
+ }
+ } else {
+#ifdef FBTILER_OPTI_UNROLL
+ for (int k = 0; k < subTileHeight; k+=4) {
+#else
+ for (int k = 0; k < subTileHeight; k+=1) {
+#endif
+ for (int p = 0; p < parallel; p++) {
+ int pTldOffset = p*tileWidth*tileHeight*bytesPerPixel;
+ int pLinOffset = p*tileWidth*bytesPerPixel;
+ memcpy(tld+tO+(k+0)*subTileWidthBytes+pTldOffset,
lin+lO+(k+0)*linLineSize+pLinOffset, subTileWidthBytes);
+#ifdef FBTILER_OPTI_UNROLL
+ memcpy(tld+tO+(k+1)*subTileWidthBytes+pTldOffset,
lin+lO+(k+1)*linLineSize+pLinOffset, subTileWidthBytes);
+ memcpy(tld+tO+(k+2)*subTileWidthBytes+pTldOffset,
lin+lO+(k+2)*linLineSize+pLinOffset, subTileWidthBytes);
+ memcpy(tld+tO+(k+3)*subTileWidthBytes+pTldOffset,
lin+lO+(k+3)*linLineSize+pLinOffset, subTileWidthBytes);
+#endif
+ }
+ }
+ }
+
+ tO = tO + subTileHeight*subTileWidthBytes;
+ cSTL += subTileHeight;
+
+ for (int i=numDirChanges-1; i>=0; i--) {
+ if ((cSTL%dirChanges[i].posOffset) == 0) {
+ if (i == numDirChanges-1) {
+ curTileInRow += parallel;
+ lX = curTileInRow*tileWidth;
+ tO = tOPrev +
tileWidth*tileHeight*bytesPerPixel*(parallel);
+ tOPrev = tO;
+ } else {
+ lX += dirChanges[i].xDelta;
+ }
+ lY += dirChanges[i].yDelta;
+ break;
+ }
+ }
+ if (lX >= w) {
+ lX = 0;
+ curTileInRow = 0;
+ lY += tileHeight;
+ if (lY >= h) {
+ break;
+ }
+ }
+ }
+ return FBT_OK;
+}
+
+
+SCOPEIN int fbtile_generic_opti(enum FBTileOps op,
+ const int w, const int h,
+ uint8_t *dst, const int dstLineSize,
+ uint8_t *src, const int srcLineSize,
+ const struct FBTileWalk *tw)
+{
+ return _fbtile_generic_opti(op, w, h,
+ dst, dstLineSize, src, srcLineSize,
+ tw->bytesPerPixel,
+ tw->subTileWidth, tw->subTileHeight,
+ tw->tileWidth, tw->tileHeight,
+ tw->numDirChanges, tw->dirChanges);
+}
+
+
+SCOPEIN int fbtile_conv(enum FBTileOps op, enum FBTileLayout layout,
+ int w, int h,
+ uint8_t *dst, int dstLineSize,
+ uint8_t *src, int srcLineSize,
+ int bytesPerPixel)
+{
+ static int logStateNone = 0;
+ static int logStateUnknown = 0;
+
+ switch(layout) {
+ case FBTILE_NONE:
+ av_log_once(NULL, AV_LOG_WARNING, AV_LOG_VERBOSE, &logStateNone,
"fbtile:conv:FBTILE_NONE: not (de)tiling\n");
+ return FBT_ERR;
+ case FBTILE_INTEL_XGEN9:
+ return fbtile_generic(op, w, h, dst, dstLineSize, src,
srcLineSize, &txTileWalk);
+ case FBTILE_INTEL_YGEN9:
+ return fbtile_generic(op, w, h, dst, dstLineSize, src,
srcLineSize, &tyTileWalk);
+ case FBTILE_INTEL_YF:
+ return fbtile_generic(op, w, h, dst, dstLineSize, src,
srcLineSize, &tyfTileWalk);
+ default:
+ av_log_once(NULL, AV_LOG_WARNING, AV_LOG_VERBOSE,
&logStateUnknown, "fbtile:conv: unknown layout [%d] specified, not
(de)tiling\n", layout);
+ return FBT_ERR;
+ }
+}
+
+
+/*
+ * Copy one AVFrame into the other, tiling or detiling as required, if
possible.
+ * NOTE: Either the Source or the Destination AVFrame (i.e one of them) should
be linear.
+ * NOTE: If the tiling layout is not understood, it will do a simple copy.
+ */
+SCOPEIN int fbtile_frame_copy(AVFrame *dst, enum FBTileLayout dstTileLayout,
AVFrame *src, enum FBTileLayout srcTileLayout,
+ enum FBTileFrameCopyStatus *status)
+{
+ int err;
+
+ if (dstTileLayout == FBTILE_NONE) { // i.e DeTile
+ err = fbtile_checkpixformats(src->format, dst->format);
+ if (!err) {
+ err = fbtile_conv(FBTILEOPS_DETILE, srcTileLayout,
+ dst->width, dst->height,
+ dst->data[0], dst->linesize[0],
+ src->data[0], src->linesize[0], 4);
+ if (!err) {
+ *status = FBTILE_FRAMECOPY_TILECOPY;
+ return FBT_OK;
+ }
+ }
+ } else if (srcTileLayout == FBTILE_NONE) { // i.e Tile
+ err = fbtile_checkpixformats(src->format, dst->format);
+ if (!err) {
+ err = fbtile_conv(FBTILEOPS_TILE, dstTileLayout,
+ src->width, src->height,
+ dst->data[0], dst->linesize[0],
+ src->data[0], src->linesize[0], 4);
+ if (!err) {
+ *status = FBTILE_FRAMECOPY_TILECOPY;
+ return FBT_OK;
+ }
+ }
+ } else {
+ av_log(NULL, AV_LOG_WARNING, "fbtile:framecopy: both src [%d] and dst
[%d] layouts cant be tiled\n", srcTileLayout, dstTileLayout);
+ }
+ *status = FBTILE_FRAMECOPY_COPYONLY;
+ return av_frame_copy(dst, src);
+}
+
+
+// vim: set expandtab sts=4: //
diff --git a/libavutil/fbtile.h b/libavutil/fbtile.h
new file mode 100644
index 0000000000..8ac06b6c05
--- /dev/null
+++ b/libavutil/fbtile.h
@@ -0,0 +1,255 @@
+/*
+ * CPU based Framebuffer Generic Tile DeTile logic
+ * Copyright (c) 2020 C Hanish Menon <HanishKVC>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_FBTILE_H
+#define AVUTIL_FBTILE_H
+
+#include <stdint.h>
+#include "libavutil/pixfmt.h"
+#include "libavutil/frame.h"
+
+/**
+ * @file
+ * @brief CPU based Framebuffer tiler detiler
+ * @author C Hanish Menon <HanishKVC>
+ * @{
+ */
+
+
+/**
+ * Set scope of this api to be either public or internal (non-public)
+ */
+// #define FBTILE_SCOPE_PUBLIC 1
+#ifdef FBTILE_SCOPE_PUBLIC
+#define SCOPEIN
+#else
+#define SCOPEIN static
+#endif
+
+
+/**
+ * Set fbtile_generic to either simple or minimal optimised logic
+ */
+#define FBTILER_GENERIC_OPTI 1
+#ifdef FBTILER_GENERIC_OPTI
+#define fbtile_generic fbtile_generic_opti
+#else
+#define fbtile_generic fbtile_generic_simple
+#endif
+
+
+// Enable printing of the tile walk
+//#define DEBUG_FBTILE 1
+
+
+// Common return values
+#define FBT_OK 0
+#define FBT_ERR 1
+
+/**
+ * The FBTile related operations
+ */
+enum FBTileOps {
+ FBTILEOPS_NONE,
+ FBTILEOPS_TILE,
+ FBTILEOPS_DETILE,
+ FBTILEOPS_UNKNOWN
+};
+
+
+/**
+ * The FBTile related Layouts
+ * This identifies the supported tile layouts
+ */
+enum FBTileLayout {
+ FBTILE_NONE, // This also corresponds to linear layout
+ FBTILE_INTEL_XGEN9,
+ FBTILE_INTEL_YGEN9,
+ FBTILE_INTEL_YF,
+ FBTILE_UNKNOWN,
+};
+
+
+/**
+ * TileWalk Direction Change Entry
+ * Used to specify the tile walking of subtiles within a tile.
+ */
+struct FBTWDirChange {
+ int posOffset;
+ int xDelta;
+ int yDelta;
+};
+
+
+/**
+ * TileWalk, Contains info required for a given tile walking.
+ *
+ * @field bytesPerPixel the bytes per pixel for the image
+ * @field subTileWidth the width of subtile within the tile, in pixels
+ * @field subTileHeight the height of subtile within the tile, in pixels
+ * @field tileWidth the width of the tile, in pixels
+ * @field tileHeight the height of the tile, in pixels
+ * @field numDirChanges the number of dir changes involved in tile walk
+ * @field dirChanges the array of dir changes for the tile walk required
+ */
+struct FBTileWalk {
+ int bytesPerPixel;
+ int subTileWidth, subTileHeight;
+ int tileWidth, tileHeight;
+ int numDirChanges;
+ struct FBTWDirChange dirChanges[];
+};
+
+
+/**
+ * FBTile FrameCopy additional status
+ */
+enum FBTileFrameCopyStatus {
+ FBTILE_FRAMECOPY_TILECOPY,
+ FBTILE_FRAMECOPY_COPYONLY
+};
+
+
+#ifdef FBTILE_SCOPE_PUBLIC
+
+
+/**
+ * Map from formatmodifier to fbtile's internal mode.
+ *
+ * @param formatModifier the format_modifier to map
+ * @return the fbtile's equivalent internal mode
+ */
+#undef DEBUG_FBTILE_FORMATMODIFIER_MAPPING
+enum FBTileLayout fbtilelayoutid_from_drmformatmodifier(uint64_t
formatModifier);
+
+
+/**
+ * Supported pixel formats by the fbtile logics
+ */
+extern const enum AVPixelFormat fbtilePixFormats[];
+/**
+ * Check if the given pixel formats are supported by fbtile logic.
+ *
+ * @param srcPixFormat pixel format of source image
+ * @param dstPixFormat pixel format of destination image
+ *
+ * @return 0 if supported, 1 if not
+ */
+int fbtile_checkpixformats(const enum AVPixelFormat srcPixFormat, const enum
AVPixelFormat dstPixFormat);
+
+
+/**
+ * Generic Logic.
+ */
+
+
+/**
+ * Tile Walk parameters for Tile-X, Tile-Y, Tile-Yf
+ */
+extern struct FBTileWalk tyfTileWalk;
+extern struct FBTileWalk txTileWalk;
+extern struct FBTileWalk tyTileWalk;
+
+
+/**
+ * Generic Logic to Tile/Detile between tiled and linear layout.
+ *
+ * @param op whether to tile or detile
+ * @param w width of the image
+ * @param h height of the image
+ * @param dst the destination image buffer
+ * @param dstLineSize the size of each row in dst image, in bytes
+ * @param src the source image buffer
+ * @param srcLineSize the size of each row in src image, in bytes
+ * @param tw the structure which contains the tile walk parameters
+ *
+ * @return 0 if detiled, 1 if not
+ */
+
+
+/**
+ * Generic tile/detile simple version.
+ */
+int fbtile_generic_simple(enum FBTileOps op,
+ const int w, const int h,
+ uint8_t *dst, const int dstLineSize,
+ uint8_t *src, const int srcLineSize,
+ const struct FBTileWalk *tw);
+
+
+/**
+ * Generic tile/detile minimal optimised version.
+ */
+int fbtile_generic_opti(enum FBTileOps op,
+ const int w, const int h,
+ uint8_t *dst, const int dstLineSize,
+ uint8_t *src, const int srcLineSize,
+ const struct FBTileWalk *tw);
+
+
+/**
+ * tile/detile demuxer.
+ *
+ * @param op todo tiling or todo detiling
+ * @param layout specify the tile layout of dst/src framebuffer involved
+ * @param w width of the image
+ * @param h height of the image
+ * @param dst the destination image buffer
+ * @param dstLineSize the size of each row in dst image, in bytes
+ * @param src the source image buffer
+ * @param srcLineSize the size of each row in src image, in bytes
+ * @param bytesPerPixel the bytes per pixel for the image
+ *
+ * @return 0 if detiled, 1 if not
+ */
+int fbtile_conv(enum FBTileOps op, enum FBTileLayout layout,
+ int w, int h,
+ uint8_t *dst, int dstLineSize,
+ uint8_t *src, int srcLineSize,
+ int bytesPerPixel);
+
+
+/**
+ * Copy one AVFrame into the other, tiling or detiling as required, if
possible.
+ * NOTE: Either the Source or the Destination AVFrame (i.e one of them) should
be linear.
+ * NOTE: If the tiling layout is not understood, it will do a simple copy.
+ *
+ * @param dst the destination avframe
+ * @param dstTileLayout the framebuffer tiling layout expected for the
destination avframe
+ * @param src the source avframe
+ * @param srcTileLayout the framebuffer tiling layout of the source avframe
+ *
+ * @return 0 if copied.
+ */
+int fbtile_frame_copy(AVFrame *dst, enum FBTileLayout dstTileLayout,
+ AVFrame *src, enum FBTileLayout srcTileLayout,
+ enum FBTileFrameCopyStatus *status);
+
+
+#endif // FBTILE_SCOPE_PUBLIC
+
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_FBTILE_H */
+// vim: set expandtab sts=4: //
diff --git a/libavutil/hwcontext_drm.c b/libavutil/hwcontext_drm.c
index 32cbde82eb..60058e0f08 100644
--- a/libavutil/hwcontext_drm.c
+++ b/libavutil/hwcontext_drm.c
@@ -21,6 +21,7 @@
#include <unistd.h>
#include <drm.h>
+#include <drm_fourcc.h>
#include <xf86drm.h>
#include "avassert.h"
@@ -28,6 +29,10 @@
#include "hwcontext_drm.h"
#include "hwcontext_internal.h"
#include "imgutils.h"
+#include "fbtile.h"
+#ifndef FBTILE_SCOPE_PUBLIC
+#include "libavutil/fbtile.c"
+#endif
static void drm_device_free(AVHWDeviceContext *hwdev)
@@ -185,6 +190,35 @@ static int drm_transfer_get_formats(AVHWFramesContext *ctx,
return 0;
}
+// Can be overridden during compiling, if required.
+#ifndef HWCTXDRM_SYNCRELATED_FORMATMODIFIER
+#define HWCTXDRM_SYNCRELATED_FORMATMODIFIER 1
+#endif
+static int drm_transfer_with_detile(const AVFrame *hwAVFrame, AVFrame *dst,
const AVFrame *src)
+{
+ int err;
+ uint64_t formatModifier;
+ enum FBTileLayout srcFBTileLayout, dstFBTileLayout;
+ enum FBTileFrameCopyStatus status;
+ AVDRMFrameDescriptor *drmFrame = NULL;
+
+ srcFBTileLayout = FBTILE_NONE;
+ dstFBTileLayout = FBTILE_NONE;
+ if (hwAVFrame->format == AV_PIX_FMT_DRM_PRIME) {
+ drmFrame = (AVDRMFrameDescriptor*)hwAVFrame->data[0];
+ formatModifier = drmFrame->objects[0].format_modifier;
+ srcFBTileLayout =
fbtilelayoutid_from_drmformatmodifier(formatModifier);
+ }
+ err = fbtile_frame_copy(dst, dstFBTileLayout, src, srcFBTileLayout,
&status);
+#if HWCTXDRM_SYNCRELATED_FORMATMODIFIER
+ if (!err && (status == FBTILE_FRAMECOPY_TILECOPY)) {
+ if (drmFrame != NULL)
+ drmFrame->objects[0].format_modifier = DRM_FORMAT_MOD_LINEAR;
+ }
+#endif
+ return err;
+}
+
static int drm_transfer_data_from(AVHWFramesContext *hwfc,
AVFrame *dst, const AVFrame *src)
{
@@ -206,7 +240,7 @@ static int drm_transfer_data_from(AVHWFramesContext *hwfc,
map->width = dst->width;
map->height = dst->height;
- err = av_frame_copy(dst, map);
+ err = drm_transfer_with_detile(src, dst, map);
if (err)
goto fail;
--
2.25.1
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