/* 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 a generic encoder type that can provide data for a stream * * Copyright (C) 2020 Daniel W. S. Almeida */ #ifndef VIDTV_ENCODER_H #define VIDTV_ENCODER_H #include <linux/types.h> enum vidtv_encoder_id { … }; struct vidtv_access_unit { … }; /* Some musical notes, used by a tone generator. Values are in Hz */ enum musical_notes { … }; /** * struct vidtv_encoder - A generic encoder type. * @id: So we can cast to a concrete implementation when needed. * @name: Usually the same as the stream name. * @encoder_buf: The encoder internal buffer for the access units. * @encoder_buf_sz: The encoder buffer size, in bytes * @encoder_buf_offset: Our byte position in the encoder buffer. * @sample_count: How many samples we have encoded in total. * @access_units: encoder payload units, used for clock references * @src_buf: The source of raw data to be encoded, encoder might set a * default if null. * @src_buf_sz: size of @src_buf. * @src_buf_offset: Our position in the source buffer. * @is_video_encoder: Whether this a video encoder (as opposed to audio) * @ctx: Encoder-specific state. * @stream_id: Examples: Audio streams (0xc0-0xdf), Video streams * (0xe0-0xef). * @es_pid: The TS PID to use for the elementary stream in this encoder. * @encode: Prepare enough AUs for the given amount of time. * @clear: Clear the encoder output. * @sync: Attempt to synchronize with this encoder. * @sampling_rate_hz: The sampling rate (or fps, if video) used. * @last_sample_cb: Called when the encoder runs out of data.This is * so the source can read data in a * piecemeal fashion instead of having to * provide it all at once. * @destroy: Destroy this encoder, freeing allocated resources. * @next: Next in the chain */ struct vidtv_encoder { … }; #endif /* VIDTV_ENCODER_H */
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