cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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vidtv_channel.h (3010B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * Vidtv serves as a reference DVB driver and helps validate the existing APIs
      4 * in the media subsystem. It can also aid developers working on userspace
      5 * applications.
      6 *
      7 * This file contains the code for a 'channel' abstraction.
      8 *
      9 * When vidtv boots, it will create some hardcoded channels.
     10 * Their services will be concatenated to populate the SDT.
     11 * Their programs will be concatenated to populate the PAT
     12 * Their events will be concatenated to populate the EIT
     13 * For each program in the PAT, a PMT section will be created
     14 * The PMT section for a channel will be assigned its streams.
     15 * Every stream will have its corresponding encoder polled to produce TS packets
     16 * These packets may be interleaved by the mux and then delivered to the bridge
     17 *
     18 *
     19 * Copyright (C) 2020 Daniel W. S. Almeida
     20 */
     21
     22#ifndef VIDTV_CHANNEL_H
     23#define VIDTV_CHANNEL_H
     24
     25#include <linux/types.h>
     26
     27#include "vidtv_encoder.h"
     28#include "vidtv_mux.h"
     29#include "vidtv_psi.h"
     30
     31/**
     32 * struct vidtv_channel - A 'channel' abstraction
     33 *
     34 * When vidtv boots, it will create some hardcoded channels.
     35 * Their services will be concatenated to populate the SDT.
     36 * Their programs will be concatenated to populate the PAT
     37 * For each program in the PAT, a PMT section will be created
     38 * The PMT section for a channel will be assigned its streams.
     39 * Every stream will have its corresponding encoder polled to produce TS packets
     40 * These packets may be interleaved by the mux and then delivered to the bridge
     41 *
     42 * @name: name of the channel
     43 * @transport_stream_id: a number to identify the TS, chosen at will.
     44 * @service: A _single_ service. Will be concatenated into the SDT.
     45 * @program_num: The link between PAT, PMT and SDT.
     46 * @program: A _single_ program with one or more streams associated with it.
     47 * Will be concatenated into the PAT.
     48 * @streams: A stream loop used to populate the PMT section for 'program'
     49 * @encoders: A encoder loop. There must be one encoder for each stream.
     50 * @events: Optional event information. This will feed into the EIT.
     51 * @next: Optionally chain this channel.
     52 */
     53struct vidtv_channel {
     54	char *name;
     55	u16 transport_stream_id;
     56	struct vidtv_psi_table_sdt_service *service;
     57	u16 program_num;
     58	struct vidtv_psi_table_pat_program *program;
     59	struct vidtv_psi_table_pmt_stream *streams;
     60	struct vidtv_encoder *encoders;
     61	struct vidtv_psi_table_eit_event *events;
     62	struct vidtv_channel *next;
     63};
     64
     65/**
     66 * vidtv_channel_si_init - Init the PSI tables from the channels in the mux
     67 * @m: The mux containing the channels.
     68 */
     69int vidtv_channel_si_init(struct vidtv_mux *m);
     70void vidtv_channel_si_destroy(struct vidtv_mux *m);
     71
     72/**
     73 * vidtv_channels_init - Init hardcoded, fake 'channels'.
     74 * @m: The mux to store the channels into.
     75 */
     76int vidtv_channels_init(struct vidtv_mux *m);
     77struct vidtv_channel
     78*vidtv_channel_s302m_init(struct vidtv_channel *head, u16 transport_stream_id);
     79void vidtv_channels_destroy(struct vidtv_mux *m);
     80
     81#endif //VIDTV_CHANNEL_H