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/*
* Copyright (C) 2005-2020 Team Kodi
* This file is part of Kodi - https://kodi.tv
*
* SPDX-License-Identifier: GPL-2.0-or-later
* See LICENSES/README.md for more information.
*/
#include "DumbBufferObject.h"
#include "ServiceBroker.h"
#include "utils/BufferObjectFactory.h"
#include "utils/log.h"
#include "windowing/gbm/WinSystemGbm.h"
#include "windowing/gbm/WinSystemGbmEGLContext.h"
#include <drm_fourcc.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <unistd.h>
#include "PlatformDefs.h"
using namespace KODI::WINDOWING::GBM;
std::unique_ptr<CBufferObject> CDumbBufferObject::Create()
{
return std::make_unique<CDumbBufferObject>();
}
void CDumbBufferObject::Register()
{
CBufferObjectFactory::RegisterBufferObject(CDumbBufferObject::Create);
}
CDumbBufferObject::CDumbBufferObject()
{
auto winSystem = static_cast<CWinSystemGbmEGLContext*>(CServiceBroker::GetWinSystem());
m_device = winSystem->GetDrm()->GetFileDescriptor();
}
CDumbBufferObject::~CDumbBufferObject()
{
ReleaseMemory();
DestroyBufferObject();
}
bool CDumbBufferObject::CreateBufferObject(uint32_t format, uint32_t width, uint32_t height)
{
if (m_fd >= 0)
return true;
uint32_t bpp;
switch (format)
{
case DRM_FORMAT_ARGB1555:
case DRM_FORMAT_RGB565:
bpp = 16;
break;
case DRM_FORMAT_ARGB8888:
bpp = 32;
break;
default:
throw std::runtime_error("CDumbBufferObject: pixel format not implemented");
}
struct drm_mode_create_dumb create_dumb{};
create_dumb.height = height;
create_dumb.width = width;
create_dumb.bpp = bpp;
int ret = drmIoctl(m_device, DRM_IOCTL_MODE_CREATE_DUMB, &create_dumb);
if (ret < 0)
{
CLog::Log(LOGERROR, "CDumbBufferObject::{} - ioctl DRM_IOCTL_MODE_CREATE_DUMB failed, errno={}",
__FUNCTION__, strerror(errno));
return false;
}
m_size = create_dumb.size;
m_stride = create_dumb.pitch;
ret = drmPrimeHandleToFD(m_device, create_dumb.handle, 0, &m_fd);
if (ret < 0)
{
CLog::Log(LOGERROR, "CDumbBufferObject::{} - failed to get fd from prime handle, errno={}",
__FUNCTION__, strerror(errno));
return false;
}
return true;
}
void CDumbBufferObject::DestroyBufferObject()
{
if (m_fd < 0)
return;
int ret = close(m_fd);
if (ret < 0)
CLog::Log(LOGERROR, "CDumbBufferObject::{} - close failed, errno={}", __FUNCTION__,
strerror(errno));
m_fd = -1;
m_stride = 0;
m_size = 0;
}
uint8_t* CDumbBufferObject::GetMemory()
{
if (m_fd < 0)
return nullptr;
if (m_map)
{
CLog::Log(LOGDEBUG, "CDumbBufferObject::{} - already mapped fd={} map={}", __FUNCTION__, m_fd,
fmt::ptr(m_map));
return m_map;
}
uint32_t handle;
int ret = drmPrimeFDToHandle(m_device, m_fd, &handle);
if (ret < 0)
{
CLog::Log(LOGERROR, "CDumbBufferObject::{} - failed to get handle from prime fd, errno={}",
__FUNCTION__, strerror(errno));
return nullptr;
}
struct drm_mode_map_dumb map_dumb{};
map_dumb.handle = handle;
ret = drmIoctl(m_device, DRM_IOCTL_MODE_MAP_DUMB, &map_dumb);
if (ret < 0)
{
CLog::Log(LOGERROR, "CDumbBufferObject::{} - ioctl DRM_IOCTL_MODE_MAP_DUMB failed, errno={}",
__FUNCTION__, strerror(errno));
return nullptr;
}
m_offset = map_dumb.offset;
m_map = static_cast<uint8_t*>(mmap(nullptr, m_size, PROT_WRITE, MAP_SHARED, m_device, m_offset));
if (m_map == MAP_FAILED)
{
CLog::Log(LOGERROR, "CDumbBufferObject::{} - mmap failed, errno={}", __FUNCTION__,
strerror(errno));
return nullptr;
}
return m_map;
}
void CDumbBufferObject::ReleaseMemory()
{
if (!m_map)
return;
int ret = munmap(m_map, m_size);
if (ret < 0)
CLog::Log(LOGERROR, "CDumbBufferObject::{} - munmap failed, errno={}", __FUNCTION__,
strerror(errno));
m_map = nullptr;
m_offset = 0;
}
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