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/***
This file is part of snapcast
Copyright (C) 2014-2025 Johannes Pohl
Copyright (C) 2025 aanno <aannoaanno@gmail.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
***/
#pragma once
// local headers
#include "pcm_stream.hpp"
// 3rd party headers
#include <boost/asio/io_context.hpp>
#include <pipewire/pipewire.h>
#include <spa/param/audio/format-utils.h>
#include <spa/param/audio/raw.h>
// standard headers
#include <mutex>
#include <thread>
#include <vector>
namespace streamreader
{
/// Reads and decodes PCM data from a PipeWire audio stream
/**
* Reads PCM from a PipeWire audio stream and passes the data to an encoder.
* Implements EncoderListener to get the encoded data.
* Data is passed to the PcmStream::Listener
*/
class PipeWireStream : public PcmStream
{
public:
/// ctor. Encoded PCM data is passed to the PipeListener
PipeWireStream(PcmStream::Listener* pcmListener, boost::asio::io_context& ioc, const ServerSettings& server_settings, const StreamUri& uri,
PcmStream::Source source);
~PipeWireStream() override;
void start() override;
void stop() override;
protected:
/// non-virtual version of stop(), for destructor
void cleanup();
private:
// PipeWire callbacks
static void on_process(void* userdata);
static void on_state_changed(void* userdata, enum pw_stream_state old, enum pw_stream_state state, const char* error);
static void on_param_changed(void* userdata, uint32_t id, const struct spa_pod* param);
static void on_core_info(void* userdata, const struct pw_core_info* info);
static void on_core_error(void* userdata, uint32_t id, int seq, int res, const char* message);
void initPipeWire();
void uninitPipeWire();
void processAudio();
// PipeWire structures
struct pw_main_loop* pw_main_loop_;
struct pw_context* pw_context_;
struct pw_core* pw_core_;
struct pw_stream* pw_stream_;
// PipeWire event handlers
struct pw_core_events core_events_;
struct spa_hook core_listener_;
struct pw_stream_events stream_events_;
struct spa_hook stream_listener_;
// Stream properties
std::string target_device_;
std::string stream_name_;
bool capture_sink_;
// Audio buffer management
std::mutex buffer_mutex_;
std::vector<uint8_t> temp_buffer_;
// Timing and state
bool first_;
std::chrono::microseconds silence_;
// Configuration
bool send_silence_;
std::chrono::milliseconds idle_threshold_;
// Stream state
enum pw_stream_state stream_state_;
bool running_;
// PipeWire thread
std::thread pw_thread_;
};
} // namespace streamreader
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