-
-
Notifications
You must be signed in to change notification settings - Fork 169
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
Showing
14 changed files
with
151 additions
and
27 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,118 @@ | ||
| /************************************************************************************ | ||
| * | ||
| * D++, A Lightweight C++ library for Discord | ||
| * | ||
| * Copyright 2021 Craig Edwards and D++ contributors | ||
| * (https://github.com/brainboxdotcc/DPP/graphs/contributors) | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * 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. | ||
| * | ||
| ************************************************************************************/ | ||
| #pragma once | ||
|
|
||
| #if defined _MSC_VER || defined __GNUC__ || defined __clang__ | ||
|
|
||
| #include <arm_neon.h> | ||
| #include <numeric> | ||
|
|
||
| namespace dpp { | ||
|
|
||
| using neon_float = float32x4_t; | ||
|
|
||
| /** | ||
| * @brief A class for audio mixing operations using ARM NEON instructions. | ||
| */ | ||
| class audio_mixer { | ||
| public: | ||
|
|
||
| /** | ||
| * @brief The number of 32-bit values per CPU register. | ||
| */ | ||
| inline static constexpr int32_t byte_blocks_per_register{ 4 }; | ||
|
|
||
| /** | ||
| * @brief Collect a single register worth of data from data_in, apply gain and increment, and store the result in data_out. | ||
| * This version uses ARM NEON instructions. | ||
| * | ||
| * @param data_in Pointer to the input array of int32_t values. | ||
| * @param data_out Pointer to the output array of int16_t values. | ||
| * @param current_gain The gain to be applied to the elements. | ||
| * @param increment The increment value to be added to each element. | ||
| */ | ||
| inline void collect_single_register(int32_t* data_in, int16_t* data_out, float current_gain, float increment) { | ||
| neon_float gathered_values = gather_values(data_in); | ||
| neon_float gain_vector = vdupq_n_f32(current_gain); | ||
| static constexpr float data[4] = { 0.0f, 1.0f, 2.0f, 3.0f }; | ||
| neon_float floats = vld1q_f32(data); | ||
| neon_float increment_vector = vmulq_f32(vdupq_n_f32(increment), floats)); | ||
| neon_float current_samples_new = vmulq_f32(gathered_values, vaddq_f32(gain_vector, increment_vector)); | ||
|
|
||
| // Clamping the values between int16_t min and max | ||
| neon_float min_val = vdupq_n_f32(static_cast<float>(std::numeric_limits<int16_t>::min())); | ||
| neon_float max_val = vdupq_n_f32(static_cast<float>(std::numeric_limits<int16_t>::max())); | ||
|
|
||
| current_samples_new = vmaxq_f32(current_samples_new, min_val); | ||
| current_samples_new = vminq_f32(current_samples_new, max_val); | ||
|
|
||
| store_values(current_samples_new, data_out); | ||
| } | ||
|
|
||
| /** | ||
| * @brief Combine a register worth of elements from decoded_data and store the result in up_sampled_vector. | ||
| * This version uses ARM NEON instructions. | ||
| * | ||
| * @param up_sampled_vector Pointer to the array of int32_t values. | ||
| * @param decoded_data Pointer to the array of int16_t values. | ||
| */ | ||
| inline void combine_samples(int32_t* up_sampled_vector, const int16_t* decoded_data) { | ||
| neon_float up_sampled = gather_values(up_sampled_vector); | ||
| neon_float decoded = gather_values(decoded_data); | ||
| neon_float newValues = vaddq_f32(up_sampled, decoded); | ||
| store_values(newValues, up_sampled_vector); | ||
| } | ||
|
|
||
| protected: | ||
| /** | ||
| * @brief Array for storing the values to be loaded/stored. | ||
| */ | ||
| alignas(16) float values[byte_blocks_per_register]{}; | ||
|
|
||
| /** | ||
| * @brief Stores values from a 128-bit NEON vector to a storage location. | ||
| * @tparam value_type The target value type for storage. | ||
| * @param values_to_store The 128-bit NEON vector containing values to store. | ||
| * @param storage_location Pointer to the storage location. | ||
| */ | ||
| template<typename value_type> inline void store_values(const neon_float& values_to_store, value_type* storage_location) { | ||
| vst1q_f32(values, values_to_store); | ||
| for (int64_t x = 0; x < byte_blocks_per_register; ++x) { | ||
| storage_location[x] = static_cast<value_type>(values[x]); | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * @brief Specialization for gathering non-float values into a NEON register. | ||
| * @tparam value_type The type of values being gathered. | ||
| * @return A NEON register containing gathered values. | ||
| */ | ||
| template<typename value_type> inline neon_float gather_values(value_type* values_new) { | ||
| for (uint64_t x = 0; x < byte_blocks_per_register; ++x) { | ||
| values[x] = static_cast<float>(values_new[x]); | ||
| } | ||
| return vld1q_f32(values); | ||
| } | ||
| }; | ||
|
|
||
| } // namespace dpp | ||
|
|
||
| #endif |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
|
|
@@ -91,3 +91,4 @@ bool voicestate::is_suppressed() const { | |
| } | ||
|
|
||
| } // namespace dpp | ||
|
|
||