157 lines
7.5 KiB
C++
157 lines
7.5 KiB
C++
#pragma once
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////////////////////////////////////////////////////////////////////////////////
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// The MIT License (MIT)
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//
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// Copyright (c) 2017 Nicholas Frechette & Animation Compression Library contributors
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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////////////////////////////////////////////////////////////////////////////////
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#include "acl/core/iallocator.h"
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#include "acl/core/track_formats.h"
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#include "acl/core/impl/compiler_utils.h"
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#include "acl/core/error.h"
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#include "acl/compression/impl/clip_context.h"
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#include <rtm/quatf.h>
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#include <rtm/vector4f.h>
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#include <cstdint>
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ACL_IMPL_FILE_PRAGMA_PUSH
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namespace acl
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{
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namespace acl_impl
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{
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inline bool is_rotation_track_constant(const RotationTrackStream& rotations, float threshold_angle)
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{
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// Calculating the average rotation and comparing every rotation in the track to it
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// to determine if we are within the threshold seems overkill. We can't use the min/max for the range
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// either because neither of those represents a valid rotation. Instead we grab
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// the first rotation, and compare everything else to it.
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auto sample_to_quat = [](const RotationTrackStream& track, uint32_t sample_index)
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{
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const rtm::vector4f rotation = track.get_raw_sample<rtm::vector4f>(sample_index);
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switch (track.get_rotation_format())
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{
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case rotation_format8::quatf_full:
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return rtm::vector_to_quat(rotation);
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case rotation_format8::quatf_drop_w_full:
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case rotation_format8::quatf_drop_w_variable:
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return rtm::quat_from_positive_w(rotation);
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default:
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ACL_ASSERT(false, "Invalid or unsupported rotation format: %s", get_rotation_format_name(track.get_rotation_format()));
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return rtm::vector_to_quat(rotation);
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}
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};
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const rtm::quatf ref_rotation = sample_to_quat(rotations, 0);
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const rtm::quatf inv_ref_rotation = rtm::quat_conjugate(ref_rotation);
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const uint32_t num_samples = rotations.get_num_samples();
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for (uint32_t sample_index = 1; sample_index < num_samples; ++sample_index)
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{
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const rtm::quatf rotation = sample_to_quat(rotations, sample_index);
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const rtm::quatf delta = rtm::quat_normalize(rtm::quat_mul(inv_ref_rotation, rotation));
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if (!rtm::quat_near_identity(delta, threshold_angle))
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return false;
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}
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return true;
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}
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inline void compact_constant_streams(iallocator& allocator, clip_context& context, const track_array_qvvf& track_list, const compression_settings& settings)
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{
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ACL_ASSERT(context.num_segments == 1, "context must contain a single segment!");
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SegmentContext& segment = context.segments[0];
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const uint32_t num_bones = context.num_bones;
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const rtm::vector4f default_scale = get_default_scale(context.additive_format);
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uint32_t num_default_bone_scales = 0;
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// When a stream is constant, we only keep the first sample
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for (uint32_t bone_index = 0; bone_index < num_bones; ++bone_index)
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{
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const track_desc_transformf& desc = track_list[bone_index].get_description();
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BoneStreams& bone_stream = segment.bone_streams[bone_index];
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BoneRanges& bone_range = context.ranges[bone_index];
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// We expect all our samples to have the same width of sizeof(rtm::vector4f)
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ACL_ASSERT(bone_stream.rotations.get_sample_size() == sizeof(rtm::vector4f), "Unexpected rotation sample size. %u != %zu", bone_stream.rotations.get_sample_size(), sizeof(rtm::vector4f));
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ACL_ASSERT(bone_stream.translations.get_sample_size() == sizeof(rtm::vector4f), "Unexpected translation sample size. %u != %zu", bone_stream.translations.get_sample_size(), sizeof(rtm::vector4f));
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ACL_ASSERT(bone_stream.scales.get_sample_size() == sizeof(rtm::vector4f), "Unexpected scale sample size. %u != %zu", bone_stream.scales.get_sample_size(), sizeof(rtm::vector4f));
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// If we request raw data, use a 0.0 threshold for safety
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const float constant_rotation_threshold_angle = settings.rotation_format != rotation_format8::quatf_full ? desc.constant_rotation_threshold_angle : 0.0F;
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const float constant_translation_threshold = settings.translation_format != vector_format8::vector3f_full ? desc.constant_translation_threshold : 0.0F;
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const float constant_scale_threshold = settings.scale_format != vector_format8::vector3f_full ? desc.constant_scale_threshold : 0.0F;
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if (is_rotation_track_constant(bone_stream.rotations, constant_rotation_threshold_angle))
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{
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RotationTrackStream constant_stream(allocator, 1, bone_stream.rotations.get_sample_size(), bone_stream.rotations.get_sample_rate(), bone_stream.rotations.get_rotation_format());
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rtm::vector4f rotation = bone_stream.rotations.get_raw_sample<rtm::vector4f>(0);
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constant_stream.set_raw_sample(0, rotation);
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bone_stream.rotations = std::move(constant_stream);
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bone_stream.is_rotation_constant = true;
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bone_stream.is_rotation_default = rtm::quat_near_identity(rtm::vector_to_quat(rotation), constant_rotation_threshold_angle);
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bone_range.rotation = TrackStreamRange::from_min_extent(rotation, rtm::vector_zero());
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}
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if (bone_range.translation.is_constant(constant_translation_threshold))
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{
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TranslationTrackStream constant_stream(allocator, 1, bone_stream.translations.get_sample_size(), bone_stream.translations.get_sample_rate(), bone_stream.translations.get_vector_format());
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rtm::vector4f translation = bone_stream.translations.get_raw_sample<rtm::vector4f>(0);
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constant_stream.set_raw_sample(0, translation);
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bone_stream.translations = std::move(constant_stream);
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bone_stream.is_translation_constant = true;
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bone_stream.is_translation_default = rtm::vector_all_near_equal3(translation, rtm::vector_zero(), constant_translation_threshold);
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bone_range.translation = TrackStreamRange::from_min_extent(translation, rtm::vector_zero());
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}
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if (bone_range.scale.is_constant(constant_scale_threshold))
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{
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ScaleTrackStream constant_stream(allocator, 1, bone_stream.scales.get_sample_size(), bone_stream.scales.get_sample_rate(), bone_stream.scales.get_vector_format());
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rtm::vector4f scale = bone_stream.scales.get_raw_sample<rtm::vector4f>(0);
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constant_stream.set_raw_sample(0, scale);
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bone_stream.scales = std::move(constant_stream);
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bone_stream.is_scale_constant = true;
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bone_stream.is_scale_default = rtm::vector_all_near_equal3(scale, default_scale, constant_scale_threshold);
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bone_range.scale = TrackStreamRange::from_min_extent(scale, rtm::vector_zero());
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num_default_bone_scales += bone_stream.is_scale_default ? 1 : 0;
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}
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}
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context.has_scale = num_default_bone_scales != num_bones;
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}
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}
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}
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ACL_IMPL_FILE_PRAGMA_POP
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