JeVois  1.21
JeVois Smart Embedded Machine Vision Toolkit
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GPUtextureDmaBuf.C
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1// ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
2//
3// JeVois Smart Embedded Machine Vision Toolkit - Copyright (C) 2016 by Laurent Itti, the University of Southern
4// California (USC), and iLab at USC. See http://iLab.usc.edu and http://jevois.org for information about this project.
5//
6// This file is part of the JeVois Smart Embedded Machine Vision Toolkit. This program is free software; you can
7// redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software
8// Foundation, version 2. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
9// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
10// License for more details. You should have received a copy of the GNU General Public License along with this program;
11// if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
12//
13// Contact information: Laurent Itti - 3641 Watt Way, HNB-07A - Los Angeles, CA 90089-2520 - USA.
14// Tel: +1 213 740 3527 - itti@pollux.usc.edu - http://iLab.usc.edu - http://jevois.org
15// ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
16/*! \file */
17
18#ifdef JEVOIS_PLATFORM_PRO
19
21#include <jevois/Util/Utils.H>
22
23#include <linux/videodev2.h>
24#include <drm/drm_fourcc.h>
25
26// ####################################################################################################
27jevois::GPUtextureDmaBuf::GPUtextureDmaBuf(EGLDisplay display, GLsizei width, GLsizei height,
28 unsigned int fmt, int dmafd) :
29 Width(width), Height(height), Display(display)
30{
31 GL_CHECK(glGenTextures(1, &Id));
32
33 // Convert V4L2 format to DRM format:
34 EGLint drm_fmt;
35 switch (fmt)
36 {
37 case V4L2_PIX_FMT_YUYV: drm_fmt = DRM_FORMAT_YUYV; break;
38 case V4L2_PIX_FMT_RGB32: drm_fmt = DRM_FORMAT_XBGR8888; break; // FIXME nasty byte swapping?
39 case V4L2_PIX_FMT_RGB565: drm_fmt = DRM_FORMAT_RGB565; break;
40 case V4L2_PIX_FMT_BGR24: drm_fmt = DRM_FORMAT_RGB888; break; // FIXME is ISP sending BGR?
41 case V4L2_PIX_FMT_RGB24: drm_fmt = DRM_FORMAT_BGR888; break; // FIXME is ISP sending BGR?
42 case V4L2_PIX_FMT_UYVY: drm_fmt = DRM_FORMAT_UYVY; break;
43
44 // Darn, greyscale does not seem to be supported by MALI, eglCreateImageKHR() fails
45 //case V4L2_PIX_FMT_GREY: drm_fmt = DRM_FORMAT_R8; break; // FIXME should be Y8
46 //case V4L2_PIX_FMT_GREY: drm_fmt = fourcc_code('G','R','E','Y'); break; // missing from drm_fourcc.h, fails too
47
48 // NV12 and YUV444 could be supported but we need 3 dmafd, 3 textures, etc
49 case V4L2_PIX_FMT_NV12: //drm_fmt = DRM_FORMAT_NV12; break;
50 case V4L2_PIX_FMT_YUV444: //drm_fmt = DRM_FORMAT_YUV444; break;
51
52 // These are not supported: FIXME could add a debayer shader or is one already in MALI?
53 case V4L2_PIX_FMT_SRGGB8:
54 case V4L2_PIX_FMT_SBGGR16:
55 case V4L2_PIX_FMT_SGRBG16:
56 case V4L2_PIX_FMT_MJPEG:
57 case 0:
58 default: LFATAL("Unsupported pixel format " << jevois::fccstr(fmt));
59 }
60
61 // Create an image:
62 EGLint attrib_list[] =
63 {
64 EGL_WIDTH, width,
65 EGL_HEIGHT, height,
66 EGL_LINUX_DRM_FOURCC_EXT, drm_fmt,
67 EGL_DMA_BUF_PLANE0_FD_EXT, dmafd,
68 EGL_DMA_BUF_PLANE0_OFFSET_EXT, 0,
69 EGL_DMA_BUF_PLANE0_PITCH_EXT, EGLint(width * jevois::v4l2BytesPerPix(fmt)),
70 //EGL_YUV_COLOR_SPACE_HINT_EXT, EGL_ITU_REC601_EXT, // EGL_ITU_REC601_EXT, EGL_ITU_REC709_EXT, EGL_ITU_REC2020_EXT
71 //EGL_SAMPLE_RANGE_HINT_EXT, EGL_YUV_FULL_RANGE_EXT, // EGL_YUV_FULL_RANGE_EXT, EGL_YUV_NARROW_RANGE_EXT
72 EGL_NONE,
73 };
74
75 Image = eglCreateImageKHR(display, EGL_NO_CONTEXT, EGL_LINUX_DMA_BUF_EXT, NULL, attrib_list);
76 if (Image == EGL_NO_IMAGE_KHR) LFATAL("eglCreateImageKHR() failed");
77
78 glBindTexture(GL_TEXTURE_EXTERNAL_OES, Id);
79 GL_CHECK(glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MIN_FILTER, GL_NEAREST));
80 GL_CHECK(glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MAG_FILTER, GL_NEAREST));
81 GL_CHECK(glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
82 GL_CHECK(glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
83 glEGLImageTargetTexture2DOES(GL_TEXTURE_EXTERNAL_OES, Image);
84 glBindTexture(GL_TEXTURE_EXTERNAL_OES, 0);
85
86 LDEBUG("Created " << width << 'x' << height << " texture (id=" << Id << ", dmafd=" << dmafd << ')');
87}
88
89// ####################################################################################################
91{
92 glDeleteTextures(1, &Id);
93 eglDestroyImageKHR(Display, Image);
94}
95
96#endif // JEVOIS_PLATFORM_PRO
#define GL_CHECK(stmt)
Simple macro to check for OpenGL errors.
Definition OpenGL.H:77
GPUtextureDmaBuf(EGLDisplay display, GLsizei width, GLsizei height, unsigned int fmt, int dmafd)
Constructor.
~GPUtextureDmaBuf()
Destructor, frees the texture in OpenGL.
#define LFATAL(msg)
Convenience macro for users to print out console or syslog messages, FATAL level.
Definition Log.H:230
#define LDEBUG(msg)
Convenience macro for users to print out console or syslog messages, DEBUG level.
Definition Log.H:173
unsigned int v4l2BytesPerPix(unsigned int fcc)
Return the number of bytes per pixel for a given V4L2_PIX_FMT_...
Definition Utils.C:141
std::string fccstr(unsigned int fcc)
Convert a V4L2 four-cc code (V4L2_PIX_FMT_...) to a 4-char string.
Definition Utils.C:45