2 * copyright (c) 2010 Sveriges Television AB <info@casparcg.com>
\r
4 * This file is part of CasparCG.
\r
6 * CasparCG is free software: you can redistribute it and/or modify
\r
7 * it under the terms of the GNU General Public License as published by
\r
8 * the Free Software Foundation, either version 3 of the License, or
\r
9 * (at your option) any later version.
\r
11 * CasparCG is distributed in the hope that it will be useful,
\r
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
\r
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
\r
14 * GNU General Public License for more details.
\r
16 * You should have received a copy of the GNU General Public License
\r
17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
\r
20 #include "../../stdafx.h"
\r
22 #include "audio_mixer.h"
\r
24 #include <core/mixer/write_frame.h>
\r
25 #include <core/producer/frame/frame_transform.h>
\r
27 #include <tbb/parallel_for.h>
\r
29 #include <safeint.h>
\r
34 namespace caspar { namespace core {
\r
39 frame_transform transform;
\r
40 audio_buffer audio_data;
\r
43 struct audio_mixer::implementation
\r
45 std::stack<core::frame_transform> transform_stack_;
\r
46 std::map<const void*, core::frame_transform> prev_frame_transforms_;
\r
47 const core::video_format_desc format_desc_;
\r
48 std::vector<audio_item> items;
\r
51 implementation(const core::video_format_desc& format_desc)
\r
52 : format_desc_(format_desc)
\r
54 transform_stack_.push(core::frame_transform());
\r
57 void begin(core::basic_frame& frame)
\r
59 transform_stack_.push(transform_stack_.top()*frame.get_frame_transform());
\r
62 void visit(core::write_frame& frame)
\r
64 // We only care about the last field.
\r
65 if(format_desc_.field_mode == field_mode::upper && transform_stack_.top().field_mode == field_mode::upper)
\r
68 if(format_desc_.field_mode == field_mode::lower && transform_stack_.top().field_mode == field_mode::lower)
\r
71 // Skip empty audio.
\r
72 if(transform_stack_.top().volume < 0.002 || frame.audio_data().empty())
\r
76 item.tag = frame.tag();
\r
77 item.transform = transform_stack_.top();
\r
78 item.audio_data = std::move(frame.audio_data());
\r
80 items.push_back(item);
\r
83 void begin(const core::frame_transform& transform)
\r
85 transform_stack_.push(transform_stack_.top()*transform);
\r
90 transform_stack_.pop();
\r
95 auto intermediate = std::vector<float, tbb::cache_aligned_allocator<float>>(format_desc_.audio_samples_per_frame+128, 0.0f);
\r
97 std::map<const void*, core::frame_transform> next_frame_transforms;
\r
99 BOOST_FOREACH(auto& item, items)
\r
101 const auto next = item.transform;
\r
104 const auto it = prev_frame_transforms_.find(item.tag);
\r
105 if(it != prev_frame_transforms_.end())
\r
108 next_frame_transforms[item.tag] = next; // Store all active tags, inactive tags will be removed at the end.
\r
110 if(next.volume < 0.001 && prev.volume < 0.001)
\r
113 if(static_cast<size_t>(item.audio_data.size()) != format_desc_.audio_samples_per_frame)
\r
116 CASPAR_ASSERT(format_desc_.audio_channels == 2);
\r
117 CASPAR_ASSERT(format_desc_.audio_samples_per_frame % 4 == 0);
\r
119 const float prev_volume = static_cast<float>(prev.volume);
\r
120 const float next_volume = static_cast<float>(next.volume);
\r
121 const float delta = 1.0f/static_cast<float>(format_desc_.audio_samples_per_frame/2);
\r
125 tbb::blocked_range<size_t>(0, format_desc_.audio_samples_per_frame/4),
\r
126 [&](const tbb::blocked_range<size_t>& r)
\r
128 for(size_t n = r.begin(); n < r.end(); ++n)
\r
130 const float alpha0 = (n*2+0) * delta;
\r
131 const float alpha1 = (n*2+1) * delta;
\r
132 const float volume0 = (prev_volume * (1.0f - alpha0)) + (next_volume * alpha0);
\r
133 const float volume1 = (prev_volume * (1.0f - alpha1)) + (next_volume * alpha1);
\r
135 auto sample_ps = _mm_cvtepi32_ps(_mm_load_si128(reinterpret_cast<__m128i*>(&item.audio_data[n*4])));
\r
136 auto res_sample_ps = _mm_load_ps(&intermediate[n*4]);
\r
137 sample_ps = _mm_mul_ps(sample_ps, _mm_setr_ps(volume1, volume1, volume0, volume0));
\r
138 res_sample_ps = _mm_add_ps(sample_ps, res_sample_ps);
\r
140 _mm_store_ps(&intermediate[n*4], res_sample_ps);
\r
146 auto result = audio_buffer(format_desc_.audio_samples_per_frame+128, 0);
\r
148 auto intermediate_128 = reinterpret_cast<__m128i*>(intermediate.data());
\r
149 auto result_128 = reinterpret_cast<__m128i*>(result.data());
\r
150 for(size_t n = 0; n < format_desc_.audio_samples_per_frame/32; ++n)
\r
152 auto xmm0 = _mm_load_ps(reinterpret_cast<float*>(intermediate_128++));
\r
153 auto xmm1 = _mm_load_ps(reinterpret_cast<float*>(intermediate_128++));
\r
154 auto xmm2 = _mm_load_ps(reinterpret_cast<float*>(intermediate_128++));
\r
155 auto xmm3 = _mm_load_ps(reinterpret_cast<float*>(intermediate_128++));
\r
156 auto xmm4 = _mm_load_ps(reinterpret_cast<float*>(intermediate_128++));
\r
157 auto xmm5 = _mm_load_ps(reinterpret_cast<float*>(intermediate_128++));
\r
158 auto xmm6 = _mm_load_ps(reinterpret_cast<float*>(intermediate_128++));
\r
159 auto xmm7 = _mm_load_ps(reinterpret_cast<float*>(intermediate_128++));
\r
161 _mm_stream_si128(result_128++, _mm_cvtps_epi32(xmm0));
\r
162 _mm_stream_si128(result_128++, _mm_cvtps_epi32(xmm1));
\r
163 _mm_stream_si128(result_128++, _mm_cvtps_epi32(xmm2));
\r
164 _mm_stream_si128(result_128++, _mm_cvtps_epi32(xmm3));
\r
165 _mm_stream_si128(result_128++, _mm_cvtps_epi32(xmm4));
\r
166 _mm_stream_si128(result_128++, _mm_cvtps_epi32(xmm5));
\r
167 _mm_stream_si128(result_128++, _mm_cvtps_epi32(xmm6));
\r
168 _mm_stream_si128(result_128++, _mm_cvtps_epi32(xmm7));
\r
172 prev_frame_transforms_ = std::move(next_frame_transforms);
\r
174 result.resize(format_desc_.audio_samples_per_frame);
\r
175 return std::move(result);
\r
179 audio_mixer::audio_mixer(const core::video_format_desc& format_desc) : impl_(new implementation(format_desc)){}
\r
180 void audio_mixer::begin(core::basic_frame& frame){impl_->begin(frame);}
\r
181 void audio_mixer::visit(core::write_frame& frame){impl_->visit(frame);}
\r
182 void audio_mixer::end(){impl_->end();}
\r
183 audio_buffer audio_mixer::mix(){return impl_->mix();}
\r
184 audio_mixer& audio_mixer::operator=(audio_mixer&& other)
\r
186 impl_ = std::move(other.impl_);
\r