]> git.sesse.net Git - casparcg/blobdiff - core/mixer/audio/audio_mixer.cpp
[audio_mixer] Removed unused method
[casparcg] / core / mixer / audio / audio_mixer.cpp
index 4636d8466e22531789666638f3589a826a9b2e56..29a89c7609c9283c639737e41c77424fdcddc4a3 100644 (file)
 * Author: Robert Nagy, ronag89@gmail.com
 */
 
-#include "../../stdafx.h"
+#include "../../StdAfx.h"
 
 #include "audio_mixer.h"
 
 #include <core/frame/frame.h>
 #include <core/frame/frame_transform.h>
+#include <core/frame/audio_channel_layout.h>
+#include <core/monitor/monitor.h>
+
 #include <common/diagnostics/graph.h>
 #include <common/linq.h>
 
 #include <boost/range/adaptors.hpp>
 #include <boost/range/distance.hpp>
+#include <boost/lexical_cast.hpp>
 
 #include <map>
 #include <stack>
@@ -39,9 +43,10 @@ namespace caspar { namespace core {
 
 struct audio_item
 {
-       const void*                     tag;
-       audio_transform         transform;
-       audio_buffer            audio_data;
+       const void*                             tag                             = nullptr;
+       audio_transform                 transform;
+       audio_buffer                    audio_data;
+       audio_channel_layout    channel_layout  = audio_channel_layout::invalid();
 
        audio_item()
        {
@@ -51,34 +56,43 @@ struct audio_item
                : tag(std::move(other.tag))
                , transform(std::move(other.transform))
                , audio_data(std::move(other.audio_data))
+               , channel_layout(std::move(other.channel_layout))
        {
        }
 };
 
-typedef cache_aligned_vector<float> audio_buffer_ps;
-       
+typedef cache_aligned_vector<double> audio_buffer_ps;
+
 struct audio_stream
 {
-       audio_transform         prev_transform;
-       audio_buffer_ps         audio_data;
-       bool                            is_still                = false;
+       audio_transform                                                 prev_transform;
+       audio_buffer_ps                                                 audio_data;
+       std::unique_ptr<audio_channel_remapper> channel_remapper;
+       bool                                                                    remapping_failed        = false;
+       bool                                                                    is_still                        = false;
 };
 
 struct audio_mixer::impl : boost::noncopyable
 {
+       monitor::subject                                        monitor_subject_                { "/audio" };
        std::stack<core::audio_transform>       transform_stack_;
        std::map<const void*, audio_stream>     audio_streams_;
        std::vector<audio_item>                         items_;
        std::vector<int>                                        audio_cadence_;
        video_format_desc                                       format_desc_;
+       audio_channel_layout                            channel_layout_                 = audio_channel_layout::invalid();
        float                                                           master_volume_                  = 1.0f;
        float                                                           previous_master_volume_ = master_volume_;
+       spl::shared_ptr<diagnostics::graph>     graph_;
 public:
-       impl()
+       impl(spl::shared_ptr<diagnostics::graph> graph)
+               : graph_(std::move(graph))
        {
+               graph_->set_color("volume", diagnostics::color(1.0f, 0.8f, 0.1f));
+               graph_->set_color("audio-clipping", diagnostics::color(0.3f, 0.6f, 0.3f));
                transform_stack_.push(core::audio_transform());
        }
-       
+
        void push(const frame_transform& transform)
        {
                transform_stack_.push(transform_stack_.top()*transform.audio_transform);
@@ -90,21 +104,17 @@ public:
                        return;
 
                audio_item item;
-               item.tag                = frame.stream_tag();
-               item.transform  = transform_stack_.top();
-               item.audio_data = frame.audio_data();
+               item.tag                        = frame.stream_tag();
+               item.transform          = transform_stack_.top();
+               item.audio_data         = frame.audio_data();
+               item.channel_layout = frame.audio_channel_layout();
 
                if(item.transform.is_still)
                        item.transform.volume = 0.0;
-               
-               items_.push_back(std::move(item));              
-       }
 
-       void begin(const core::audio_transform& transform)
-       {
-               transform_stack_.push(transform_stack_.top()*transform);
+               items_.push_back(std::move(item));
        }
-               
+
        void pop()
        {
                transform_stack_.pop();
@@ -115,109 +125,212 @@ public:
                master_volume_ = volume;
        }
 
-       audio_buffer mix(const video_format_desc& format_desc)
-       {       
-               if(format_desc_ != format_desc)
+       float get_master_volume()
+       {
+               return master_volume_;
+       }
+
+       audio_buffer mix(const video_format_desc& format_desc, const audio_channel_layout& channel_layout)
+       {
+               if(format_desc_ != format_desc || channel_layout_ != channel_layout)
                {
                        audio_streams_.clear();
                        audio_cadence_ = format_desc.audio_cadence;
                        format_desc_ = format_desc;
-               }               
-               
+                       channel_layout_ = channel_layout;
+               }
+
                std::map<const void*, audio_stream>     next_audio_streams;
-               std::vector<const void*> used_tags;
 
                for (auto& item : items_)
-               {                       
+               {
                        audio_buffer_ps next_audio;
+                       std::unique_ptr<audio_channel_remapper> channel_remapper;
+                       bool remapping_failed = false;
 
                        auto next_transform = item.transform;
                        auto prev_transform = next_transform;
 
                        auto tag = item.tag;
 
-                       if(boost::range::find(used_tags, tag) != used_tags.end())
+                       auto it = next_audio_streams.find(tag);
+                       bool found = it != next_audio_streams.end();
+
+                       if (!found)
+                       {
+                               it = audio_streams_.find(tag);
+                               found = it != audio_streams_.end();
+                       }
+
+                       if (found)
+                       {
+                               prev_transform = it->second.prev_transform;
+                               next_audio = std::move(it->second.audio_data);
+                               channel_remapper = std::move(it->second.channel_remapper);
+                               remapping_failed = it->second.remapping_failed;
+                       }
+
+                       if (remapping_failed)
+                       {
+                               CASPAR_LOG(trace) << "[audio_mixer] audio channel remapping already failed for stream.";
+                               next_audio_streams[tag].remapping_failed = true;
                                continue;
-                       
-                       used_tags.push_back(tag);
-
-                       const auto it = audio_streams_.find(tag);
-                       if(it != audio_streams_.end())
-                       {       
-                               prev_transform  = it->second.prev_transform;
-                               next_audio              = std::move(it->second.audio_data);
                        }
-                       
+
                        // Skip it if there is no existing audio stream and item has no audio-data.
-                       if(it == audio_streams_.end() && item.audio_data.empty()) 
+                       if(!found && item.audio_data.empty())
                                continue;
-                                               
-                       const float prev_volume = static_cast<float>(prev_transform.volume) * previous_master_volume_;
-                       const float next_volume = static_cast<float>(next_transform.volume) * master_volume_;
+
+                       if (item.channel_layout == audio_channel_layout::invalid())
+                       {
+                               CASPAR_LOG(warning) << "[audio_mixer] invalid audio channel layout for item";
+                               next_audio_streams[tag].remapping_failed = true;
+                               continue;
+                       }
+
+                       if (!channel_remapper)
+                       {
+                               try
+                               {
+                                       channel_remapper.reset(new audio_channel_remapper(item.channel_layout, channel_layout_));
+                               }
+                               catch (...)
+                               {
+                                       CASPAR_LOG_CURRENT_EXCEPTION();
+                                       CASPAR_LOG(error) << "[audio_mixer] audio channel remapping failed for stream.";
+                                       next_audio_streams[tag].remapping_failed = true;
+                                       continue;
+                               }
+                       }
+
+                       item.audio_data = channel_remapper->mix_and_rearrange(item.audio_data);
+
+                       const double prev_volume = prev_transform.volume * previous_master_volume_;
+                       const double next_volume = next_transform.volume * master_volume_;
 
                        // TODO: Move volume mixing into code below, in order to support audio sample counts not corresponding to frame audio samples.
-                       auto alpha = (next_volume-prev_volume)/static_cast<float>(item.audio_data.size()/format_desc.audio_channels);
-                       
+                       auto alpha = (next_volume-prev_volume)/static_cast<double>(item.audio_data.size()/channel_layout_.num_channels);
+
                        for(size_t n = 0; n < item.audio_data.size(); ++n)
                        {
-                               auto sample_multiplier = (prev_volume + (n/format_desc_.audio_channels) * alpha);
-                               next_audio.push_back(item.audio_data[n] * sample_multiplier);
-                       } 
-                                                                               
-                       next_audio_streams[tag].prev_transform  = std::move(next_transform); // Store all active tags, inactive tags will be removed at the end.
-                       next_audio_streams[tag].audio_data              = std::move(next_audio);        
-                       next_audio_streams[tag].is_still                = item.transform.is_still;
-               }                               
+                               auto sample_multiplier = (prev_volume + (n / channel_layout_.num_channels) * alpha);
+                               next_audio.push_back(item.audio_data.data()[n] * sample_multiplier);
+                       }
+
+                       next_audio_streams[tag].prev_transform          = std::move(next_transform); // Store all active tags, inactive tags will be removed at the end.
+                       next_audio_streams[tag].audio_data                      = std::move(next_audio);
+                       next_audio_streams[tag].channel_remapper        = std::move(channel_remapper);
+                       next_audio_streams[tag].remapping_failed        = remapping_failed;
+                       next_audio_streams[tag].is_still                        = item.transform.is_still;
+               }
 
                previous_master_volume_ = master_volume_;
                items_.clear();
 
                audio_streams_ = std::move(next_audio_streams);
-               
-               if(audio_streams_.empty())              
-                       audio_streams_[nullptr].audio_data = audio_buffer_ps(audio_size(audio_cadence_.front()), 0.0f);
+
+               if(audio_streams_.empty())
+                       audio_streams_[nullptr].audio_data = audio_buffer_ps(audio_size(audio_cadence_.front()), 0.0);
 
                { // sanity check
 
                        auto nb_invalid_streams = cpplinq::from(audio_streams_)
                                .select(values())
-                               .where([&](const audio_stream& x) { return x.audio_data.size() < audio_size(audio_cadence_.front()); })
+                               .where([&](const audio_stream& x)
+                               {
+                                       return !x.remapping_failed && x.audio_data.size() < audio_size(audio_cadence_.front());
+                               })
                                .count();
 
-                       if(nb_invalid_streams > 0)              
-                               CASPAR_LOG(trace) << "[audio_mixer] Incorrect frame audio cadence detected.";                   
+                       if(nb_invalid_streams > 0)
+                               CASPAR_LOG(trace) << "[audio_mixer] Incorrect frame audio cadence detected.";
                }
-                               
-               std::vector<float> result_ps(audio_size(audio_cadence_.front()), 0.0f);
+
+               audio_buffer_ps result_ps(audio_size(audio_cadence_.front()), 0.0);
                for (auto& stream : audio_streams_ | boost::adaptors::map_values)
                {
-                       if(stream.audio_data.size() < result_ps.size())
-                               stream.audio_data.resize(result_ps.size(), 0.0f);
+                       if (stream.audio_data.size() < result_ps.size())
+                       {
+                               auto samples = (result_ps.size() - stream.audio_data.size()) / channel_layout_.num_channels;
+                               CASPAR_LOG(trace) << L"[audio_mixer] Appended " << samples << L" zero samples";
+                               CASPAR_LOG(trace) << L"[audio_mixer] Actual number of samples " << stream.audio_data.size() / channel_layout_.num_channels;
+                               CASPAR_LOG(trace) << L"[audio_mixer] Wanted number of samples " << result_ps.size() / channel_layout_.num_channels;
+                               stream.audio_data.resize(result_ps.size(), 0.0);
+                       }
 
-                       auto out = boost::range::transform(result_ps, stream.audio_data, std::begin(result_ps), std::plus<float>());
+                       auto out = boost::range::transform(result_ps, stream.audio_data, std::begin(result_ps), std::plus<double>());
                        stream.audio_data.erase(std::begin(stream.audio_data), std::begin(stream.audio_data) + std::distance(std::begin(result_ps), out));
-               }               
-               
+               }
+
                boost::range::rotate(audio_cadence_, std::begin(audio_cadence_)+1);
-               
-               audio_buffer result;
+
+               auto result_owner = spl::make_shared<mutable_audio_buffer>();
+               auto& result = *result_owner;
                result.reserve(result_ps.size());
-               boost::range::transform(result_ps, std::back_inserter(result), [](float sample){return static_cast<int32_t>(sample);});         
-               
-               return result;
+               const int32_t min_amplitude = std::numeric_limits<int32_t>::min();
+               const int32_t max_amplitude = std::numeric_limits<int32_t>::max();
+               bool clipping = false;
+               boost::range::transform(result_ps, std::back_inserter(result), [&](double sample)
+               {
+                       if (sample > max_amplitude)
+                       {
+                               clipping = true;
+                               return max_amplitude;
+                       }
+                       else if (sample < min_amplitude)
+                       {
+                               clipping = true;
+                               return min_amplitude;
+                       }
+                       else
+                               return static_cast<int32_t>(sample);
+               });
+
+               if (clipping)
+                       graph_->set_tag(diagnostics::tag_severity::WARNING, "audio-clipping");
+
+               const int num_channels = channel_layout_.num_channels;
+               monitor_subject_ << monitor::message("/nb_channels") % num_channels;
+
+               auto max = std::vector<int32_t>(num_channels, std::numeric_limits<int32_t>::min());
+
+               for (size_t n = 0; n < result.size(); n += num_channels)
+                       for (int ch = 0; ch < num_channels; ++ch)
+                               max[ch] = std::max(max[ch], std::abs(result[n + ch]));
+
+               // Makes the dBFS of silence => -dynamic range of 32bit LPCM => about -192 dBFS
+               // Otherwise it would be -infinity
+               static const auto MIN_PFS = 0.5f / static_cast<float>(std::numeric_limits<int32_t>::max());
+
+               for (int i = 0; i < num_channels; ++i)
+               {
+                       const auto pFS = max[i] / static_cast<float>(std::numeric_limits<int32_t>::max());
+                       const auto dBFS = 20.0f * std::log10(std::max(MIN_PFS, pFS));
+
+                       auto chan_str = boost::lexical_cast<std::string>(i + 1);
+
+                       monitor_subject_ << monitor::message("/" + chan_str + "/pFS") % pFS;
+                       monitor_subject_ << monitor::message("/" + chan_str + "/dBFS") % dBFS;
+               }
+
+               graph_->set_value("volume", static_cast<double>(*boost::max_element(max)) / std::numeric_limits<int32_t>::max());
+
+               return caspar::array<int32_t>(result.data(), result.size(), true, std::move(result_owner));
        }
 
        size_t audio_size(size_t num_samples) const
        {
-               return num_samples * format_desc_.audio_channels;
+               return num_samples * channel_layout_.num_channels;
        }
 };
 
-audio_mixer::audio_mixer() : impl_(new impl()){}
+audio_mixer::audio_mixer(spl::shared_ptr<diagnostics::graph> graph) : impl_(new impl(std::move(graph))){}
 void audio_mixer::push(const frame_transform& transform){impl_->push(transform);}
 void audio_mixer::visit(const const_frame& frame){impl_->visit(frame);}
 void audio_mixer::pop(){impl_->pop();}
 void audio_mixer::set_master_volume(float volume) { impl_->set_master_volume(volume); }
-audio_buffer audio_mixer::operator()(const video_format_desc& format_desc){return impl_->mix(format_desc);}
+float audio_mixer::get_master_volume() { return impl_->get_master_volume(); }
+audio_buffer audio_mixer::operator()(const video_format_desc& format_desc, const audio_channel_layout& channel_layout){ return impl_->mix(format_desc, channel_layout); }
+monitor::subject& audio_mixer::monitor_output(){ return impl_->monitor_subject_; }
 
-}}
\ No newline at end of file
+}}