| /* 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_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. |
| * @events: Optional event information. This will feed into the EIT. |
| * @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_psi_table_eit_event *events; |
| 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 |