H264 Stream

Data Structures
struct	H264DecodedVuiParameters
struct	H264DecodeResult
struct	H264DecodeOutput

Typedefs
typedef struct H264DecodedVuiParameters	H264DecodedVuiParameters
typedef struct H264DecodeResult	H264DecodeResult
typedef struct H264DecodeOutput	H264DecodeOutput
typedef void(*	H264DECFptrOutputFn) (H264DecodeOutput *output)
typedef enum H264Error	H264Error
	h264 library errors. More...

Enumerations
enum	H264Error {   H264_ERROR_OK = 0 ,   H264_ERROR_INVALID_PPS = 24 ,   H264_ERROR_INVALID_SPS = 26 ,   H264_ERROR_INVALID_SLICEHEADER = 61 ,   H264_ERROR_GENERIC = 0x1000000 ,   H264_ERROR_INVALID_PARAMETER = 0x1010000 ,   H264_ERROR_OUT_OF_MEMORY = 0x1020000 ,   H264_ERROR_INVALID_PROFILE = 0x1080000 }
	h264 library errors. More...

Functions
H264Error	H264DECCheckDecunitLength (void *memory, const uint8_t *buffer, int32_t bufferLength, int32_t offset, int32_t *outLength)
	Check that the stream contains sufficient data to decode an entire frame. More...
H264Error	H264DECCheckSkipableFrame (const uint8_t *buffer, int32_t bufferLength, BOOL *outSkippable)
	Check if the next NALU can be skipped without breaking decoding. More...
H264Error	H264DECFindDecstartpoint (const uint8_t *buffer, int32_t bufferLength, int32_t *outOffset)
	Find the first SPS in the stream. More...
int32_t	H264DECFindIdrpoint (const uint8_t *buffer, int32_t bufferLength, int32_t *outOffset)
	Find the first "IDR point" in the stream. More...
H264Error	H264DECGetImageSize (const uint8_t *buffer, int32_t bufferLength, int32_t offset, int32_t *outWidth, int32_t *outHeight)
	Parse the H264 stream and read the width & height from the first found SPS. More...

Detailed Description

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Data Structure Documentation

H264DecodedVuiParameters

struct H264DecodedVuiParameters

Definition at line 49 of file stream.h.

Data Fields
uint8_t	aspect_ratio_info_present_flag
uint8_t	aspect_ratio_idc
int16_t	sar_width
int16_t	sar_height
uint8_t	overscan_info_present_flag
uint8_t	overscan_appropriate_flag
uint8_t	video_signal_type_present_flag
uint8_t	video_format
uint8_t	video_full_range_flag
uint8_t	colour_description_present_flag
uint8_t	colour_primaries
uint8_t	transfer_characteristics
uint8_t	matrix_coefficients
uint8_t	chroma_loc_info_present_flag
uint8_t	chroma_sample_loc_type_top_field
uint8_t	chroma_sample_loc_type_bottom_field
uint8_t	timing_info_present_flag
uint32_t	num_units_in_tick
uint32_t	time_scale
uint8_t	fixed_frame_rate_flag
uint8_t	nal_hrd_parameters_present_flag
uint8_t	vcl_hrd_parameters_present_flag
uint8_t	low_delay_hrd_flag
uint8_t	pic_struct_present_flag
uint8_t	bitstream_restriction_flag
uint8_t	motion_vectors_over_pic_boundaries_flag
int16_t	max_bytes_per_pic_denom
int16_t	max_bits_per_mb_denom
int16_t	log2_max_mv_length_horizontal
int16_t	log2_max_mv_length_vertical
int16_t	num_reorder_frames
int16_t	max_dec_frame_buffering

H264DecodeResult

struct H264DecodeResult

Definition at line 120 of file stream.h.

Data Fields
int32_t	status
double	timestamp
int32_t	width
int32_t	height
int32_t	nextLine
uint8_t	cropEnableFlag
int32_t	cropTop
int32_t	cropBottom
int32_t	cropLeft
int32_t	cropRight
uint8_t	panScanEnableFlag
int32_t	panScanTop
int32_t	panScanBottom
int32_t	panScanLeft
int32_t	panScanRight
void *	framebuffer
uint8_t	vui_parameters_present_flag
H264DecodedVuiParameters *	vui_parameters

H264DecodeOutput

struct H264DecodeOutput

Definition at line 166 of file stream.h.

Data Fields
int32_t	frameCount	Number of frames output.
H264DecodeResult **	decodeResults	Frames.
void *	userMemory	User memory pointer passed into SetParam.

Typedef Documentation

H264DecodedVuiParameters

typedef struct H264DecodedVuiParameters H264DecodedVuiParameters

Definition at line 1 of file stream.h.

H264DecodeResult

typedef struct H264DecodeResult H264DecodeResult

Definition at line 1 of file stream.h.

H264DecodeOutput

typedef struct H264DecodeOutput H264DecodeOutput

Definition at line 1 of file stream.h.

H264DECFptrOutputFn

typedef void(* H264DECFptrOutputFn) (H264DecodeOutput *output)

Definition at line 17 of file stream.h.

H264Error

typedef enum H264Error H264Error

h264 library errors.

Enumeration Type Documentation

H264Error

enum H264Error

h264 library errors.

Enumerator
H264_ERROR_OK	No errors.
H264_ERROR_INVALID_PPS	Invalid picture parameter set.
H264_ERROR_INVALID_SPS	Invalid sequence parameter set.
H264_ERROR_INVALID_SLICEHEADER	Invalid slice header.
H264_ERROR_GENERIC	Generic h264 error.
H264_ERROR_INVALID_PARAMETER	Invalid parameters passed.
H264_ERROR_OUT_OF_MEMORY	The amount of memory provided to the h264 library is insufficient.
H264_ERROR_INVALID_PROFILE	Invalid h264 stream profile. Only the baseline (66), main (77) and high (100) profiles are allowed.

Definition at line 20 of file stream.h.

Function Documentation

H264DECCheckDecunitLength()

H264Error H264DECCheckDecunitLength	(	void *	memory,
		const uint8_t *	buffer,
		int32_t	bufferLength,
		int32_t	offset,
		int32_t *	outLength
	)

Check that the stream contains sufficient data to decode an entire frame.

H264DECCheckSkipableFrame()

H264Error H264DECCheckSkipableFrame	(	const uint8_t *	buffer,
		int32_t	bufferLength,
		BOOL *	outSkippable
	)

Check if the next NALU can be skipped without breaking decoding.

H264DECFindDecstartpoint()

H264Error H264DECFindDecstartpoint	(	const uint8_t *	buffer,
		int32_t	bufferLength,
		int32_t *	outOffset
	)

Find the first SPS in the stream.

H264DECFindIdrpoint()

int32_t H264DECFindIdrpoint	(	const uint8_t *	buffer,
		int32_t	bufferLength,
		int32_t *	outOffset
	)

Find the first "IDR point" in the stream.

An IDR point is either:

• If an SPS or PPS header is found before the IDR and there are no non-IDR inbetween the SPS/PPS and IDR then return the first of the SPS/PPS.
• The first found IDR.

H264DECGetImageSize()

H264Error H264DECGetImageSize	(	const uint8_t *	buffer,
		int32_t	bufferLength,
		int32_t	offset,
		int32_t *	outWidth,
		int32_t *	outHeight
	)

Parse the H264 stream and read the width & height from the first found SPS.