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/*
* Copyright (c) 2016-2023 Arm Limited.
*
* SPDX-License-Identifier: MIT
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef ARM_COMPUTE_CORE_UTILS_FORMATUTILS_H
#define ARM_COMPUTE_CORE_UTILS_FORMATUTILS_H
#include "arm_compute/core/CoreTypes.h"
#include "arm_compute/core/Error.h"
namespace arm_compute
{
/** The size in bytes of the pixel format
*
* @param[in] format Input format
*
* @return The size in bytes of the pixel format
*/
inline size_t pixel_size_from_format(Format format)
{
switch (format)
{
case Format::U8:
return 1;
case Format::U16:
case Format::S16:
case Format::BFLOAT16:
case Format::F16:
case Format::UV88:
case Format::YUYV422:
case Format::UYVY422:
return 2;
case Format::RGB888:
return 3;
case Format::RGBA8888:
return 4;
case Format::U32:
case Format::S32:
case Format::F32:
return 4;
//Doesn't make sense for planar formats:
case Format::NV12:
case Format::NV21:
case Format::IYUV:
case Format::YUV444:
default:
ARM_COMPUTE_ERROR("Undefined pixel size for given format");
return 0;
}
}
/** Return the plane index of a given channel given an input format.
*
* @param[in] format Input format
* @param[in] channel Input channel
*
* @return The plane index of the specific channel of the specific format
*/
inline int plane_idx_from_channel(Format format, Channel channel)
{
switch (format)
{
// Single planar formats have a single plane
case Format::U8:
case Format::U16:
case Format::S16:
case Format::U32:
case Format::S32:
case Format::BFLOAT16:
case Format::F16:
case Format::F32:
case Format::UV88:
case Format::RGB888:
case Format::RGBA8888:
case Format::YUYV422:
case Format::UYVY422:
return 0;
// Multi planar formats
case Format::NV12:
case Format::NV21:
{
// Channel U and V share the same plane of format UV88
switch (channel)
{
case Channel::Y:
return 0;
case Channel::U:
case Channel::V:
return 1;
default:
ARM_COMPUTE_ERROR("Not supported channel");
return 0;
}
}
case Format::IYUV:
case Format::YUV444:
{
switch (channel)
{
case Channel::Y:
return 0;
case Channel::U:
return 1;
case Channel::V:
return 2;
default:
ARM_COMPUTE_ERROR("Not supported channel");
return 0;
}
}
default:
ARM_COMPUTE_ERROR("Not supported format");
return 0;
}
}
/** Return the channel index of a given channel given an input format.
*
* @param[in] format Input format
* @param[in] channel Input channel
*
* @return The channel index of the specific channel of the specific format
*/
inline int channel_idx_from_format(Format format, Channel channel)
{
switch (format)
{
case Format::RGB888:
{
switch (channel)
{
case Channel::R:
return 0;
case Channel::G:
return 1;
case Channel::B:
return 2;
default:
ARM_COMPUTE_ERROR("Not supported channel");
return 0;
}
}
case Format::RGBA8888:
{
switch (channel)
{
case Channel::R:
return 0;
case Channel::G:
return 1;
case Channel::B:
return 2;
case Channel::A:
return 3;
default:
ARM_COMPUTE_ERROR("Not supported channel");
return 0;
}
}
case Format::YUYV422:
{
switch (channel)
{
case Channel::Y:
return 0;
case Channel::U:
return 1;
case Channel::V:
return 3;
default:
ARM_COMPUTE_ERROR("Not supported channel");
return 0;
}
}
case Format::UYVY422:
{
switch (channel)
{
case Channel::Y:
return 1;
case Channel::U:
return 0;
case Channel::V:
return 2;
default:
ARM_COMPUTE_ERROR("Not supported channel");
return 0;
}
}
case Format::NV12:
{
switch (channel)
{
case Channel::Y:
return 0;
case Channel::U:
return 0;
case Channel::V:
return 1;
default:
ARM_COMPUTE_ERROR("Not supported channel");
return 0;
}
}
case Format::NV21:
{
switch (channel)
{
case Channel::Y:
return 0;
case Channel::U:
return 1;
case Channel::V:
return 0;
default:
ARM_COMPUTE_ERROR("Not supported channel");
return 0;
}
}
case Format::YUV444:
case Format::IYUV:
{
switch (channel)
{
case Channel::Y:
return 0;
case Channel::U:
return 0;
case Channel::V:
return 0;
default:
ARM_COMPUTE_ERROR("Not supported channel");
return 0;
}
}
default:
ARM_COMPUTE_ERROR("Not supported format");
return 0;
}
}
/** Return the number of planes for a given format
*
* @param[in] format Input format
*
* @return The number of planes for a given image format.
*/
inline size_t num_planes_from_format(Format format)
{
switch (format)
{
case Format::U8:
case Format::S16:
case Format::U16:
case Format::S32:
case Format::U32:
case Format::BFLOAT16:
case Format::F16:
case Format::F32:
case Format::RGB888:
case Format::RGBA8888:
case Format::YUYV422:
case Format::UYVY422:
return 1;
case Format::NV12:
case Format::NV21:
return 2;
case Format::IYUV:
case Format::YUV444:
return 3;
default:
ARM_COMPUTE_ERROR("Not supported format");
return 0;
}
}
/** Return the number of channels for a given single-planar pixel format
*
* @param[in] format Input format
*
* @return The number of channels for a given image format.
*/
inline size_t num_channels_from_format(Format format)
{
switch (format)
{
case Format::U8:
case Format::U16:
case Format::S16:
case Format::U32:
case Format::S32:
case Format::BFLOAT16:
case Format::F16:
case Format::F32:
return 1;
// Because the U and V channels are subsampled
// these formats appear like having only 2 channels:
case Format::YUYV422:
case Format::UYVY422:
return 2;
case Format::UV88:
return 2;
case Format::RGB888:
return 3;
case Format::RGBA8888:
return 4;
//Doesn't make sense for planar formats:
case Format::NV12:
case Format::NV21:
case Format::IYUV:
case Format::YUV444:
default:
return 0;
}
}
/** Convert a tensor format into a string.
*
* @param[in] format @ref Format to be translated to string.
*
* @return The string describing the format.
*/
const std::string &string_from_format(Format format);
} // namespace arm_compute
#endif /*ARM_COMPUTE_CORE_UTILS_FORMATUTILS_H */
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