SmolRTSP_JpegPayloadHeader Struct Reference

An RFC 2435 main JPEG header (§3.1). More...

#include <jpeg.h>

Data Fields
uint8_t	type_specific
	Type-specific field (byte 0).
uint32_t	fragment_offset
	Fragment offset within the JPEG frame, in bytes (bytes 1..3, 24-bit big-endian).
uint8_t	type
	RTP/JPEG Type field (byte 4): subsampling + interlace flags.
uint8_t	q
	Quality factor (byte 5).
uint8_t	width_blocks
	Picture width in 8-pixel units (byte 6).
uint8_t	height_blocks
	Picture height in 8-pixel units (byte 7).

Detailed Description

An RFC 2435 main JPEG header (§3.1).

Bit layout, transmitted in network byte order:

 0                   1                   2                   3
 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type-specific |              Fragment Offset                  |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|      Type     |       Q       |     Width     |     Height    |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Field Documentation

fragment_offset

uint32_t SmolRTSP_JpegPayloadHeader::fragment_offset

Fragment offset within the JPEG frame, in bytes (bytes 1..3, 24-bit big-endian).

The transport stamps this per packet; callers populate 0 in a fresh header.

q

uint8_t SmolRTSP_JpegPayloadHeader::q

Quality factor (byte 5).

Values < SMOLRTSP_JPEG_Q_DYNAMIC reference the standard tables; values >= 128 mean a dynamic table is embedded.

type_specific

uint8_t SmolRTSP_JpegPayloadHeader::type_specific

Type-specific field (byte 0).

Set 0 for baseline RFC 2435 use.

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The documentation for this struct was generated from the following file:

• include/smolrtsp/jpeg.h