结构体 AVCodecParserContext 

#[repr(C)]
pub struct AVCodecParserContext {

    pub priv_data: *mut c_void,
    pub parser: *const AVCodecParser,
    pub frame_offset: i64,
    pub cur_offset: i64,
    pub next_frame_offset: i64,
    pub pict_type: c_int,
    pub repeat_pict: c_int,
    pub pts: i64,
    pub dts: i64,
    pub last_pts: i64,
    pub last_dts: i64,
    pub fetch_timestamp: c_int,
    pub cur_frame_start_index: c_int,
    pub cur_frame_offset: [i64; 4],
    pub cur_frame_pts: [i64; 4],
    pub cur_frame_dts: [i64; 4],
    pub flags: c_int,
    pub offset: i64,
    pub cur_frame_end: [i64; 4],
    pub key_frame: c_int,
    pub dts_sync_point: c_int,
    pub dts_ref_dts_delta: c_int,
    pub pts_dts_delta: c_int,
    pub cur_frame_pos: [i64; 4],
    pub pos: i64,
    pub last_pos: i64,
    pub duration: c_int,
    pub field_order: AVFieldOrder,
    pub picture_structure: AVPictureStructure,
    pub output_picture_number: c_int,
    pub width: c_int,
    pub height: c_int,
    pub coded_width: c_int,
    pub coded_height: c_int,
    pub format: c_int,
}

Fields

priv_data: *mut c_void

parser: *const AVCodecParser

frame_offset: i64

cur_offset: i64

next_frame_offset: i64

pict_type: c_int

repeat_pict: c_int

This field is used for proper frame duration computation in lavf. It signals, how much longer the frame duration of the current frame is compared to normal frame duration.

frame_duration = (1 + repeat_pict) * time_base

It is used by codecs like H.264 to display telecined material.

pts: i64

dts: i64

last_pts: i64

last_dts: i64

fetch_timestamp: c_int

cur_frame_start_index: c_int

cur_frame_offset: [i64; 4]

cur_frame_pts: [i64; 4]

cur_frame_dts: [i64; 4]

flags: c_int

offset: i64

< byte offset from starting packet start

cur_frame_end: [i64; 4]

key_frame: c_int

Set by parser to 1 for key frames and 0 for non-key frames. It is initialized to -1, so if the parser doesn’t set this flag, old-style fallback using AV_PICTURE_TYPE_I picture type as key frames will be used.

dts_sync_point: c_int

Synchronization point for start of timestamp generation.

Set to >0 for sync point, 0 for no sync point and <0 for undefined (default).

For example, this corresponds to presence of H.264 buffering period SEI message.

dts_ref_dts_delta: c_int

Offset of the current timestamp against last timestamp sync point in units of AVCodecContext.time_base.

Set to INT_MIN when dts_sync_point unused. Otherwise, it must contain a valid timestamp offset.

Note that the timestamp of sync point has usually a nonzero dts_ref_dts_delta, which refers to the previous sync point. Offset of the next frame after timestamp sync point will be usually 1.

For example, this corresponds to H.264 cpb_removal_delay.

pts_dts_delta: c_int

Presentation delay of current frame in units of AVCodecContext.time_base.

Set to INT_MIN when dts_sync_point unused. Otherwise, it must contain valid non-negative timestamp delta (presentation time of a frame must not lie in the past).

This delay represents the difference between decoding and presentation time of the frame.

For example, this corresponds to H.264 dpb_output_delay.

cur_frame_pos: [i64; 4]

Position of the packet in file.

Analogous to cur_frame_pts/dts

pos: i64

Byte position of currently parsed frame in stream.

last_pos: i64

Previous frame byte position.

duration: c_int

Duration of the current frame. For audio, this is in units of 1 / AVCodecContext.sample_rate. For all other types, this is in units of AVCodecContext.time_base.

field_order: AVFieldOrder

picture_structure: AVPictureStructure

Indicate whether a picture is coded as a frame, top field or bottom field.

For example, H.264 field_pic_flag equal to 0 corresponds to AV_PICTURE_STRUCTURE_FRAME. An H.264 picture with field_pic_flag equal to 1 and bottom_field_flag equal to 0 corresponds to AV_PICTURE_STRUCTURE_TOP_FIELD.

output_picture_number: c_int

Picture number incremented in presentation or output order. This field may be reinitialized at the first picture of a new sequence.

For example, this corresponds to H.264 PicOrderCnt.

width: c_int

Dimensions of the decoded video intended for presentation.

height: c_int

coded_width: c_int

Dimensions of the coded video.

coded_height: c_int

format: c_int

The format of the coded data, corresponds to enum AVPixelFormat for video and for enum AVSampleFormat for audio.

Note that a decoder can have considerable freedom in how exactly it decodes the data, so the format reported here might be different from the one returned by a decoder.

trait 实现

impl Clone for AVCodecParserContext

fn clone(&self) -> AVCodecParserContext

Returns a duplicate of the value. 阅读更多

fn clone_from(&mut self, source: &Self)

从 source 执行拷贝赋值。 阅读更多

impl Debug for AVCodecParserContext

fn fmt(&self, f: &mut Formatter<'_>) -> Result

使用给定的格式化器格式化该值。 阅读更多

impl PartialEq for AVCodecParserContext

fn eq(&self, other: &AVCodecParserContext) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

测试 !=。默认实现几乎总是足够的，没有充分理由不应被重写。

impl Copy for AVCodecParserContext

impl Eq for AVCodecParserContext

impl StructuralPartialEq for AVCodecParserContext