/* 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 * Their events will be concatenated to populate the EIT * 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_encoder.h" #include "vidtv_mux.h" #include "vidtv_psi.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 * * @name: name of the channel * @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. * @events: Optional event information. This will feed into the EIT. * @next: Optionally chain this channel. */ struct vidtv_channel { … }; /** * vidtv_channel_si_init - Init the PSI tables from the channels in the mux * @m: The mux containing the channels. */ int 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. */ int 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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