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/* ------------------------------------------------------------------
* Copyright (C) 2019 Matthias P. Braendli
*
* 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.
* -------------------------------------------------------------------
*/
/*! \file GSTInput.h
*
* This input uses GStreamer to get audio data.
*/
#pragma once
#include "config.h"
#if HAVE_GST
#include <string>
#include <vector>
#include <cstddef>
#include <cstdint>
#include <gst/gst.h>
#include "SampleQueue.h"
#include "common.h"
#include "InputInterface.h"
extern "C" {
#include "utils.h"
}
struct GSTData {
GSTData(SampleQueue<uint8_t>& samplequeue);
GstElement *pipeline = nullptr;
GstElement *uridecodebin = nullptr;
GstElement *audio_convert = nullptr;
GstElement *caps_filter = nullptr;
GstElement *app_sink = nullptr;
GstBus *bus = nullptr;
GMainLoop *main_loop = nullptr;
SampleQueue<uint8_t>& samplequeue;
};
class GSTInput : public InputInterface
{
public:
GSTInput(const std::string& uri,
int rate,
unsigned channels,
SampleQueue<uint8_t>& queue);
GSTInput(const GSTInput& other) = delete;
GSTInput& operator=(const GSTInput& other) = delete;
virtual ~GSTInput();
virtual void prepare() override;
virtual bool read_source(size_t num_bytes) override;
int getRate() { return m_rate; }
virtual bool fault_detected(void) const override { return false; };
private:
std::string m_uri;
unsigned m_channels;
int m_rate;
GSTData m_gst_data;
SampleQueue<uint8_t>& m_samplequeue;
};
#endif // HAVE_GST
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