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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Vidtv serves as a reference DVB driver and helps validate the existing APIs
* in the media subsystem. It can also aid developers working on userspace
* applications.
*
* This file contains the code for a 'channel' abstraction.
*
* When vidtv boots, it will create some hardcoded channels.
* Their services will be concatenated to populate the SDT.
* Their programs will be concatenated to populate the PAT
* For each program in the PAT, a PMT section will be created
* The PMT section for a channel will be assigned its streams.
* Every stream will have its corresponding encoder polled to produce TS packets
* These packets may be interleaved by the mux and then delivered to the bridge
*
*
* Copyright (C) 2020 Daniel W. S. Almeida
*/
#ifndef VIDTV_CHANNEL_H
#define VIDTV_CHANNEL_H
#include <linux/types.h>
#include "vidtv_psi.h"
#include "vidtv_encoder.h"
#include "vidtv_mux.h"
/**
* struct vidtv_channel - A 'channel' abstraction
*
* When vidtv boots, it will create some hardcoded channels.
* Their services will be concatenated to populate the SDT.
* Their programs will be concatenated to populate the PAT
* For each program in the PAT, a PMT section will be created
* The PMT section for a channel will be assigned its streams.
* Every stream will have its corresponding encoder polled to produce TS packets
* These packets may be interleaved by the mux and then delivered to the bridge
*
* @transport_stream_id: a number to identify the TS, chosen at will.
* @service: A _single_ service. Will be concatenated into the SDT.
* @program_num: The link between PAT, PMT and SDT.
* @program: A _single_ program with one or more streams associated with it.
* Will be concatenated into the PAT.
* @streams: A stream loop used to populate the PMT section for 'program'
* @encoders: A encoder loop. There must be one encoder for each stream.
* @next: Optionally chain this channel.
*/
struct vidtv_channel {
char *name;
u16 transport_stream_id;
struct vidtv_psi_table_sdt_service *service;
u16 program_num;
struct vidtv_psi_table_pat_program *program;
struct vidtv_psi_table_pmt_stream *streams;
struct vidtv_encoder *encoders;
struct vidtv_channel *next;
};
/**
* vidtv_channel_si_init - Init the PSI tables from the channels in the mux
* @m: The mux containing the channels.
*/
void vidtv_channel_si_init(struct vidtv_mux *m);
void vidtv_channel_si_destroy(struct vidtv_mux *m);
/**
* vidtv_channels_init - Init hardcoded, fake 'channels'.
* @m: The mux to store the channels into.
*/
void vidtv_channels_init(struct vidtv_mux *m);
struct vidtv_channel
*vidtv_channel_s302m_init(struct vidtv_channel *head, u16 transport_stream_id);
void vidtv_channels_destroy(struct vidtv_mux *m);
#endif //VIDTV_CHANNEL_H
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