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/*! @file component.h
*
* @brief Declaration of routines for the inverse component transform and permutation.
* A codebooks contains the variable-length codes for coefficient magnitudes, runs
* of zeros, and special codewords that mark entropy codec locations in bitstream.
* The codebook is used to create tables and simplify entropy coding of signed values
* and runs of zeros.
*
* (C) Copyright 2018 GoPro Inc (http://gopro.com/).
*
* Licensed under either:
* - Apache License, Version 2.0, http://www.apache.org/licenses/LICENSE-2.0
* - MIT license, http://opensource.org/licenses/MIT
* at your option.
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef COMPONENT_H
#define COMPONENT_H
/*!
@brief Data structure for the component transform (16 bit precision)
*/
typedef struct _component_transform
{
uint16_t component_count;
uint16_t *transform_matrix;
uint16_t *transform_offset;
uint16_t *transform_scale;
} COMPONENT_TRANSFORM;
/*!
@brief Data structure for the component permutation
*/
typedef struct _component_permutation
{
uint16_t component_count;
uint16_t *permutation_array;
} COMPONENT_PERMUTATION;
#ifdef __cplusplus
extern "C" {
#endif
CODEC_ERROR InitComponentTransform(COMPONENT_TRANSFORM *transform);
CODEC_ERROR InitComponentPermutation(COMPONENT_PERMUTATION *permutation);
CODEC_ERROR AllocateComponentTransform(gpr_allocator *allocator,
COMPONENT_TRANSFORM *transform,
int component_count);
CODEC_ERROR AllocateComponentPermutation(gpr_allocator *allocator,
COMPONENT_PERMUTATION *permutation,
int component_count);
CODEC_ERROR ReleaseComponentTransform(gpr_allocator *allocator,
COMPONENT_TRANSFORM *transform);
CODEC_ERROR ReleaseComponentPermutation(gpr_allocator *allocator,
COMPONENT_PERMUTATION *permutation);
CODEC_ERROR InitComponentTransformIdentity(COMPONENT_TRANSFORM *transform,
int component_count,
gpr_allocator *allocator);
CODEC_ERROR InitComponentPermutationIdentity(COMPONENT_PERMUTATION *permutation,
int component_count,
gpr_allocator *allocator);
CODEC_ERROR InitComponentTransformTesting(COMPONENT_TRANSFORM *transform,
int component_count,
gpr_allocator *allocator);
CODEC_ERROR InitComponentPermutationTesting(COMPONENT_PERMUTATION *permutation,
int component_count,
gpr_allocator *allocator);
bool IsComponentTransformIdentity(COMPONENT_TRANSFORM *transform);
bool IsComponentPermutationIdentity(COMPONENT_PERMUTATION *permutation);
CODEC_ERROR WriteComponentTransform(COMPONENT_TRANSFORM *transform, BITSTREAM *stream);
CODEC_ERROR WriteComponentPermutation(COMPONENT_PERMUTATION *permutation, BITSTREAM *stream);
#ifdef __cplusplus
}
#endif
#endif // COMPONENT_H
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