466f6b4fc4
The HTTP Streamer can be enabled via the _streamer_enabled_ daemon parameter. When the Streamer is active the daemon starts capturing the configured _Sinks_ up to the maximum number of channels configured by the _streamer_channels_ parameters. The captured PCM samples are split into _streamer_files_num_ files of _streamer_file_duration_ duration (in seconds) for each sink, compressed using AAC LC codec and served via HTTP. The HTTP streamer requires the libfaac-dev package to compile. Please note that since the HTTP Streamer uses the RAVENNA ALSA device for capturing it's not possible to use such device for other audio captures.
116 lines
3.8 KiB
C++
116 lines
3.8 KiB
C++
// streamer.hpp
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//
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// Copyright (c) 2019 2024 Andrea Bondavalli. All rights reserved.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#ifndef _STREAMER_HPP_
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#define _STREAMER_HPP_
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#include <cstdlib>
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#include <iostream>
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#include <memory>
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#include <vector>
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#include <alsa/asoundlib.h>
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#include <faac.h>
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#include "session_manager.hpp"
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struct StreamerInfo {
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uint8_t status;
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uint16_t file_duration{0};
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uint8_t files_num{0};
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uint8_t player_buffer_files_num{0};
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uint8_t channels{0};
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uint8_t start_file_id{0};
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uint8_t current_file_id{0};
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uint32_t rate{0};
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std::string format;
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};
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class Streamer {
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public:
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static std::shared_ptr<Streamer> create(
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std::shared_ptr<SessionManager> session_manager,
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std::shared_ptr<Config> config);
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Streamer() = delete;
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Streamer(const Browser&) = delete;
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Streamer& operator=(const Browser&) = delete;
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bool init();
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bool terminate();
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std::error_code get_info(const StreamSink& sink, StreamerInfo& info);
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std::error_code get_stream(const StreamSink& sink,
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uint8_t file_id,
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uint8_t& current_file_id,
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uint8_t& start_file_id,
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uint32_t& file_count,
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std::string& out);
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protected:
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explicit Streamer(std::shared_ptr<SessionManager> session_manager,
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std::shared_ptr<Config> config)
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: session_manager_(session_manager), config_(config){};
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private:
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constexpr static const char device_name[] = "plughw:RAVENNA";
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constexpr static snd_pcm_format_t format = SND_PCM_FORMAT_S16_LE;
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bool pcm_xrun();
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bool pcm_suspend();
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ssize_t pcm_read(uint8_t* data, size_t rcount);
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bool on_ptp_status_change(const std::string& status);
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bool on_sink_add(uint8_t id);
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bool on_sink_remove(uint8_t id);
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bool start_capture();
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bool stop_capture();
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bool setup_codec(const StreamSink& sink);
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void open_files(uint8_t files_id);
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void close_files(uint8_t files_id);
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void save_files(uint8_t files_id);
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std::shared_ptr<SessionManager> session_manager_;
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std::shared_ptr<Config> config_;
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snd_pcm_uframes_t chunk_samples_{0};
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size_t bytes_per_frame_{0};
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uint16_t file_duration_{1};
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uint8_t files_num_{8};
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uint8_t player_buffer_files_num_{1};
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size_t buffer_samples_{0};
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std::unordered_map<uint8_t, size_t> total_sink_samples_;
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uint32_t buffer_offset_{0};
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std::unordered_map<uint8_t, std::shared_mutex> streams_mutex_;
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std::unordered_map<uint8_t, std::stringstream> tmp_streams_;
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std::map<std::pair<uint8_t, uint8_t>, std::stringstream> output_streams_;
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std::unordered_map<uint8_t, uint32_t> output_ids_;
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uint32_t file_counter_{0};
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std::atomic<uint8_t> file_id_{0};
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std::unique_ptr<uint8_t[]> buffer_;
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std::unordered_map<uint8_t, std::unique_ptr<uint8_t[]> > out_buffer_;
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std::unordered_map<uint8_t, uint32_t> out_buffer_size_{0};
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uint8_t channels_{8};
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uint32_t rate_{0};
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std::future<bool> res_;
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snd_pcm_t* capture_handle_;
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std::atomic_bool running_{false};
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std::unordered_map<uint8_t, faacEncHandle> faac_;
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std::unordered_map<uint8_t, std::mutex> faac_mutex_;
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std::unordered_map<uint8_t, unsigned long> codec_in_samples_;
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std::unordered_map<uint8_t, unsigned long> codec_out_buffer_size_;
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};
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#endif
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