459 lines
13 KiB
C++
459 lines
13 KiB
C++
/* akvirtualcamera, virtual camera for Mac and Windows.
|
|
* Copyright (C) 2020 Gonzalo Exequiel Pedone
|
|
*
|
|
* akvirtualcamera is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* akvirtualcamera 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with akvirtualcamera. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
* Web-Site: http://webcamoid.github.io/
|
|
*/
|
|
|
|
#include <algorithm>
|
|
#include <map>
|
|
#include <ostream>
|
|
|
|
#include "videoformat.h"
|
|
#include "utils.h"
|
|
|
|
namespace AkVCam
|
|
{
|
|
class VideoFormatPrivate
|
|
{
|
|
public:
|
|
FourCC m_fourcc {0};
|
|
int m_width {0};
|
|
int m_height {0};
|
|
std::vector<Fraction> m_frameRates;
|
|
|
|
VideoFormatPrivate() = default;
|
|
VideoFormatPrivate(FourCC fourcc,
|
|
int width,
|
|
int height,
|
|
const std::vector<Fraction> &frameRates);
|
|
};
|
|
|
|
using PlaneOffsetFunc = size_t (*)(size_t plane, size_t width, size_t height);
|
|
using ByplFunc = size_t (*)(size_t plane, size_t width);
|
|
|
|
class VideoFormatGlobals
|
|
{
|
|
public:
|
|
PixelFormat format;
|
|
size_t bpp;
|
|
size_t planes;
|
|
PlaneOffsetFunc planeOffset;
|
|
ByplFunc bypl;
|
|
std::string str;
|
|
|
|
inline static const std::vector<VideoFormatGlobals> &formats();
|
|
static inline const VideoFormatGlobals *byPixelFormat(PixelFormat pixelFormat);
|
|
static inline const VideoFormatGlobals *byStr(const std::string &str);
|
|
static size_t offsetNV(size_t plane, size_t width, size_t height);
|
|
static size_t byplNV(size_t plane, size_t width);
|
|
|
|
template<typename T>
|
|
static inline T alignUp(const T &value, const T &align)
|
|
{
|
|
return (value + align - 1) & ~(align - 1);
|
|
}
|
|
|
|
template<typename T>
|
|
static inline T align32(const T &value)
|
|
{
|
|
return alignUp<T>(value, 32);
|
|
}
|
|
};
|
|
}
|
|
|
|
AkVCam::VideoFormat::VideoFormat()
|
|
{
|
|
this->d = new VideoFormatPrivate;
|
|
}
|
|
|
|
AkVCam::VideoFormat::VideoFormat(FourCC fourcc,
|
|
int width,
|
|
int height,
|
|
const std::vector<Fraction> &frameRates)
|
|
{
|
|
this->d = new VideoFormatPrivate(fourcc, width, height, frameRates);
|
|
}
|
|
|
|
AkVCam::VideoFormat::VideoFormat(const VideoFormat &other)
|
|
{
|
|
this->d = new VideoFormatPrivate(other.d->m_fourcc,
|
|
other.d->m_width,
|
|
other.d->m_height,
|
|
other.d->m_frameRates);
|
|
}
|
|
|
|
AkVCam::VideoFormat::~VideoFormat()
|
|
{
|
|
delete this->d;
|
|
}
|
|
|
|
AkVCam::VideoFormat &AkVCam::VideoFormat::operator =(const VideoFormat &other)
|
|
{
|
|
if (this != &other) {
|
|
this->d->m_fourcc = other.d->m_fourcc;
|
|
this->d->m_width = other.d->m_width;
|
|
this->d->m_height = other.d->m_height;
|
|
this->d->m_frameRates = other.d->m_frameRates;
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
bool AkVCam::VideoFormat::operator ==(const AkVCam::VideoFormat &other) const
|
|
{
|
|
return this->d->m_fourcc == other.d->m_fourcc
|
|
&& this->d->m_width == other.d->m_width
|
|
&& this->d->m_height == other.d->m_height
|
|
&& this->d->m_frameRates == other.d->m_frameRates;
|
|
}
|
|
|
|
bool AkVCam::VideoFormat::operator !=(const AkVCam::VideoFormat &other) const
|
|
{
|
|
return this->d->m_fourcc != other.d->m_fourcc
|
|
|| this->d->m_width != other.d->m_width
|
|
|| this->d->m_height != other.d->m_height
|
|
|| this->d->m_frameRates != other.d->m_frameRates;
|
|
}
|
|
|
|
AkVCam::VideoFormat::operator bool() const
|
|
{
|
|
return this->isValid();
|
|
}
|
|
|
|
AkVCam::FourCC AkVCam::VideoFormat::fourcc() const
|
|
{
|
|
return this->d->m_fourcc;
|
|
}
|
|
|
|
AkVCam::FourCC &AkVCam::VideoFormat::fourcc()
|
|
{
|
|
return this->d->m_fourcc;
|
|
}
|
|
|
|
int AkVCam::VideoFormat::width() const
|
|
{
|
|
return this->d->m_width;
|
|
}
|
|
|
|
int &AkVCam::VideoFormat::width()
|
|
{
|
|
return this->d->m_width;
|
|
}
|
|
|
|
int AkVCam::VideoFormat::height() const
|
|
{
|
|
return this->d->m_height;
|
|
}
|
|
|
|
int &AkVCam::VideoFormat::height()
|
|
{
|
|
return this->d->m_height;
|
|
}
|
|
|
|
std::vector<AkVCam::Fraction> AkVCam::VideoFormat::frameRates() const
|
|
{
|
|
return this->d->m_frameRates;
|
|
}
|
|
|
|
std::vector<AkVCam::Fraction> &AkVCam::VideoFormat::frameRates()
|
|
{
|
|
return this->d->m_frameRates;
|
|
}
|
|
|
|
std::vector<AkVCam::FractionRange> AkVCam::VideoFormat::frameRateRanges() const
|
|
{
|
|
std::vector<FractionRange> ranges;
|
|
|
|
if (!this->d->m_frameRates.empty()) {
|
|
auto min = *std::min_element(this->d->m_frameRates.begin(),
|
|
this->d->m_frameRates.end());
|
|
auto max = *std::max_element(this->d->m_frameRates.begin(),
|
|
this->d->m_frameRates.end());
|
|
ranges.emplace_back(FractionRange {min, max});
|
|
}
|
|
|
|
return ranges;
|
|
}
|
|
|
|
AkVCam::Fraction AkVCam::VideoFormat::minimumFrameRate() const
|
|
{
|
|
if (this->d->m_frameRates.empty())
|
|
return {0, 0};
|
|
|
|
return *std::min_element(this->d->m_frameRates.begin(),
|
|
this->d->m_frameRates.end());
|
|
}
|
|
|
|
size_t AkVCam::VideoFormat::bpp() const
|
|
{
|
|
auto vf = VideoFormatGlobals::byPixelFormat(PixelFormat(this->d->m_fourcc));
|
|
|
|
return vf? vf->bpp: 0;
|
|
}
|
|
|
|
size_t AkVCam::VideoFormat::bypl(size_t plane) const
|
|
{
|
|
auto vf = VideoFormatGlobals::byPixelFormat(PixelFormat(this->d->m_fourcc));
|
|
|
|
if (!vf)
|
|
return 0;
|
|
|
|
if (vf->bypl)
|
|
return vf->bypl(plane, size_t(this->d->m_width));
|
|
|
|
return VideoFormatGlobals::align32(size_t(this->d->m_width) * vf->bpp) / 8;
|
|
}
|
|
|
|
size_t AkVCam::VideoFormat::size() const
|
|
{
|
|
auto vf = VideoFormatGlobals::byPixelFormat(PixelFormat(this->d->m_fourcc));
|
|
|
|
if (!vf)
|
|
return 0;
|
|
|
|
if (vf->planeOffset)
|
|
return vf->planeOffset(vf->planes,
|
|
size_t(this->d->m_width),
|
|
size_t(this->d->m_height));
|
|
|
|
return size_t(this->d->m_height)
|
|
* VideoFormatGlobals::align32(size_t(this->d->m_width)
|
|
* vf->bpp) / 8;
|
|
}
|
|
|
|
size_t AkVCam::VideoFormat::planes() const
|
|
{
|
|
auto vf = VideoFormatGlobals::byPixelFormat(PixelFormat(this->d->m_fourcc));
|
|
|
|
return vf? vf->planes: 0;
|
|
}
|
|
|
|
size_t AkVCam::VideoFormat::offset(size_t plane) const
|
|
{
|
|
auto vf = VideoFormatGlobals::byPixelFormat(PixelFormat(this->d->m_fourcc));
|
|
|
|
if (!vf)
|
|
return 0;
|
|
|
|
if (vf->planeOffset)
|
|
return vf->planeOffset(plane,
|
|
size_t(this->d->m_width),
|
|
size_t(this->d->m_height));
|
|
|
|
return 0;
|
|
}
|
|
|
|
size_t AkVCam::VideoFormat::planeSize(size_t plane) const
|
|
{
|
|
return size_t(this->d->m_height) * this->bypl(plane);
|
|
}
|
|
|
|
bool AkVCam::VideoFormat::isValid() const
|
|
{
|
|
if (this->size() <= 0)
|
|
return false;
|
|
|
|
if (this->d->m_frameRates.empty())
|
|
return false;
|
|
|
|
for (auto &fps: this->d->m_frameRates)
|
|
if (fps.num() < 1 || fps.den() < 1)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
void AkVCam::VideoFormat::clear()
|
|
{
|
|
this->d->m_fourcc = 0;
|
|
this->d->m_width = 0;
|
|
this->d->m_height = 0;
|
|
this->d->m_frameRates.clear();
|
|
}
|
|
|
|
AkVCam::VideoFormat AkVCam::VideoFormat::nearest(const std::vector<VideoFormat> &formats) const
|
|
{
|
|
VideoFormat nearestFormat;
|
|
auto q = std::numeric_limits<uint64_t>::max();
|
|
auto svf = VideoFormatGlobals::byPixelFormat(PixelFormat(this->d->m_fourcc));
|
|
|
|
for (auto &format: formats) {
|
|
auto vf = VideoFormatGlobals::byPixelFormat(PixelFormat(format.d->m_fourcc));
|
|
uint64_t diffFourcc = format.d->m_fourcc == this->d->m_fourcc? 0: 1;
|
|
auto diffWidth = format.d->m_width - this->d->m_width;
|
|
auto diffHeight = format.d->m_height - this->d->m_height;
|
|
auto diffBpp = vf->bpp - svf->bpp;
|
|
auto diffPlanes = vf->planes - svf->planes;
|
|
|
|
uint64_t k = diffFourcc
|
|
+ uint64_t(diffWidth * diffWidth)
|
|
+ uint64_t(diffHeight * diffHeight)
|
|
+ diffBpp * diffBpp
|
|
+ diffPlanes * diffPlanes;
|
|
|
|
if (k < q) {
|
|
nearestFormat = format;
|
|
q = k;
|
|
}
|
|
}
|
|
|
|
return nearestFormat;
|
|
}
|
|
|
|
void AkVCam::VideoFormat::roundNearest(int width, int height,
|
|
int *owidth, int *oheight,
|
|
int align)
|
|
{
|
|
/* Explanation:
|
|
*
|
|
* When 'align' is a power of 2, the left most bit will be 1 (the pivot),
|
|
* while all other bits be 0, if destination width is multiple of 'align'
|
|
* all bits after pivot position will be 0, then we create a mask
|
|
* substracting 1 to the align, so all bits after pivot position in the
|
|
* mask will 1.
|
|
* Then we negate all bits in the mask so all bits from pivot to the left
|
|
* will be 1, and then we use that mask to get a width multiple of align.
|
|
* This give us the lower (floor) width nearest to the original 'width' and
|
|
* multiple of align. To get the rounded nearest value we add align / 2 to
|
|
* 'width'.
|
|
* This is the equivalent of:
|
|
*
|
|
* align * round(width / align)
|
|
*/
|
|
*owidth = (width + (align >> 1)) & ~(align - 1);
|
|
|
|
/* Find the nearest width:
|
|
*
|
|
* round(height * owidth / width)
|
|
*/
|
|
*oheight = (2 * height * *owidth + width) / (2 * width);
|
|
}
|
|
|
|
AkVCam::FourCC AkVCam::VideoFormat::fourccFromString(const std::string &fourccStr)
|
|
{
|
|
auto vf = VideoFormatGlobals::byStr(fourccStr);
|
|
|
|
return vf? vf->format: 0;
|
|
}
|
|
|
|
std::string AkVCam::VideoFormat::stringFromFourcc(AkVCam::FourCC fourcc)
|
|
{
|
|
auto vf = VideoFormatGlobals::byPixelFormat(PixelFormat(fourcc));
|
|
|
|
return vf? vf->str: std::string();
|
|
}
|
|
|
|
AkVCam::VideoFormatPrivate::VideoFormatPrivate(FourCC fourcc,
|
|
int width,
|
|
int height,
|
|
const std::vector<Fraction> &frameRates):
|
|
m_fourcc(fourcc),
|
|
m_width(width),
|
|
m_height(height),
|
|
m_frameRates(frameRates)
|
|
{
|
|
}
|
|
|
|
const std::vector<AkVCam::VideoFormatGlobals> &AkVCam::VideoFormatGlobals::formats()
|
|
{
|
|
static const std::vector<VideoFormatGlobals> formats {
|
|
{PixelFormatRGB32, 32, 1, nullptr, nullptr, "RGB32"},
|
|
{PixelFormatRGB24, 24, 1, nullptr, nullptr, "RGB24"},
|
|
{PixelFormatRGB16, 16, 1, nullptr, nullptr, "RGB16"},
|
|
{PixelFormatRGB15, 16, 1, nullptr, nullptr, "RGB15"},
|
|
{PixelFormatBGR32, 32, 1, nullptr, nullptr, "BGR32"},
|
|
{PixelFormatBGR24, 24, 1, nullptr, nullptr, "BGR24"},
|
|
{PixelFormatBGR16, 16, 1, nullptr, nullptr, "BGR16"},
|
|
{PixelFormatBGR15, 16, 1, nullptr, nullptr, "BGR15"},
|
|
{PixelFormatUYVY , 16, 1, nullptr, nullptr, "UYVY"},
|
|
{PixelFormatYUY2 , 16, 1, nullptr, nullptr, "YUY2"},
|
|
{PixelFormatNV12 , 12, 2, offsetNV, byplNV, "NV12"},
|
|
{PixelFormatNV21 , 12, 2, offsetNV, byplNV, "NV21"}
|
|
};
|
|
|
|
return formats;
|
|
}
|
|
|
|
const AkVCam::VideoFormatGlobals *AkVCam::VideoFormatGlobals::byPixelFormat(PixelFormat pixelFormat)
|
|
{
|
|
for (auto &format: formats())
|
|
if (format.format == pixelFormat)
|
|
return &format;
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
const AkVCam::VideoFormatGlobals *AkVCam::VideoFormatGlobals::byStr(const std::string &str)
|
|
{
|
|
for (auto &format: formats())
|
|
if (format.str == str)
|
|
return &format;
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
size_t AkVCam::VideoFormatGlobals::offsetNV(size_t plane, size_t width, size_t height)
|
|
{
|
|
size_t offset[] = {
|
|
0,
|
|
align32(size_t(width)) * height,
|
|
5 * align32(size_t(width)) * height / 4
|
|
};
|
|
|
|
return offset[plane];
|
|
}
|
|
|
|
size_t AkVCam::VideoFormatGlobals::byplNV(size_t plane, size_t width)
|
|
{
|
|
UNUSED(plane);
|
|
|
|
return align32(size_t(width));
|
|
}
|
|
|
|
std::ostream &operator <<(std::ostream &os, const AkVCam::VideoFormat &format)
|
|
{
|
|
auto formatStr = AkVCam::VideoFormat::stringFromFourcc(format.fourcc());
|
|
|
|
os << "VideoFormat("
|
|
<< formatStr
|
|
<< ' '
|
|
<< format.width()
|
|
<< 'x'
|
|
<< format.height()
|
|
<< ' '
|
|
<< format.minimumFrameRate()
|
|
<< ')';
|
|
|
|
return os;
|
|
}
|
|
|
|
std::ostream &operator <<(std::ostream &os, const AkVCam::VideoFormats &formats)
|
|
{
|
|
bool writeComma = false;
|
|
os << "VideoFormats(";
|
|
|
|
for (auto &format: formats) {
|
|
if (writeComma)
|
|
os << ", ";
|
|
|
|
os << format;
|
|
writeComma = true;
|
|
}
|
|
|
|
os << ')';
|
|
|
|
return os;
|
|
}
|