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/*========================================================================
O p e n M M
V i d e o U t i l i t i e s
*//** @file VideoUtils.cpp
This module contains utilities and helper routines.
@par EXTERNALIZED FUNCTIONS
@par INITIALIZATION AND SEQUENCING REQUIREMENTS
(none)
*//*====================================================================== */
/* =======================================================================
INCLUDE FILES FOR MODULE
========================================================================== */
#include "hevc_utils.h"
#include "vidc_debug.h"
#include <string.h>
#include <stdlib.h>
#include <limits.h>
#include <sys/time.h>
#ifdef _ANDROID_
#include <cutils/properties.h>
#endif
/* =======================================================================
DEFINITIONS AND DECLARATIONS FOR MODULE
This section contains definitions for constants, macros, types, variables
and other items needed by this module.
========================================================================== */
HEVC_Utils::HEVC_Utils()
{
initialize_frame_checking_environment();
}
HEVC_Utils::~HEVC_Utils()
{
}
/***********************************************************************/
/*
FUNCTION:
HEVC_Utils::initialize_frame_checking_environment
DESCRIPTION:
Extract RBSP data from a NAL
INPUT/OUTPUT PARAMETERS:
None
RETURN VALUE:
boolean
SIDE EFFECTS:
None.
*/
/***********************************************************************/
void HEVC_Utils::initialize_frame_checking_environment()
{
m_forceToStichNextNAL = false;
m_au_data = false;
nalu_type = NAL_UNIT_INVALID;
}
/*===========================================================================
FUNCTION:
HEVC_Utils::iSNewFrame
DESCRIPTION:
Returns true if NAL parsing successfull otherwise false.
INPUT/OUTPUT PARAMETERS:
<In>
buffer : buffer containing start code or nal length + NAL units
buffer_length : the length of the NAL buffer
start_code : If true, start code is detected,
otherwise size nal length is detected
size_of_nal_length_field: size of nal length field
<out>
isNewFrame: true if the NAL belongs to a differenet frame
false if the NAL belongs to a current frame
RETURN VALUE:
boolean true, if nal parsing is successful
false, if the nal parsing has errors
SIDE EFFECTS:
None.
===========================================================================*/
bool HEVC_Utils::isNewFrame(OMX_BUFFERHEADERTYPE *p_buf_hdr,
OMX_IN OMX_U32 size_of_nal_length_field,
OMX_OUT OMX_BOOL &isNewFrame)
{
OMX_IN OMX_U8 *buffer = p_buf_hdr->pBuffer;
OMX_IN OMX_U32 buffer_length = p_buf_hdr->nFilledLen;
byte bFirstSliceInPic = 0;
byte coef1=1, coef2=0, coef3=0;
uint32 pos = 0;
uint32 nal_len = buffer_length;
uint32 sizeofNalLengthField = 0;
uint32 zero_count;
boolean start_code = (size_of_nal_length_field==0)?true:false;
if (start_code) {
// Search start_code_prefix_one_3bytes (0x000001)
coef2 = buffer[pos++];
coef3 = buffer[pos++];
do {
if (pos >= buffer_length) {
DEBUG_PRINT_ERROR("ERROR: In %s() - line %d", __func__, __LINE__);
return false;
}
coef1 = coef2;
coef2 = coef3;
coef3 = buffer[pos++];
} while (coef1 || coef2 || coef3 != 1);
} else if (size_of_nal_length_field) {
/* This is the case to play multiple NAL units inside each access unit*/
/* Extract the NAL length depending on sizeOfNALength field */
sizeofNalLengthField = size_of_nal_length_field;
nal_len = 0;
while (size_of_nal_length_field--) {
nal_len |= buffer[pos++]<<(size_of_nal_length_field<<3);
}
if (nal_len >= buffer_length) {
DEBUG_PRINT_ERROR("ERROR: In %s() - line %d", __func__, __LINE__);
return false;
}
}
if (nal_len > buffer_length) {
DEBUG_PRINT_ERROR("ERROR: In %s() - line %d", __func__, __LINE__);
return false;
}
if (pos + 2 > (nal_len + sizeofNalLengthField)) {
DEBUG_PRINT_ERROR("ERROR: In %s() - line %d", __func__, __LINE__);
return false;
}
nalu_type = (buffer[pos] & 0x7E)>>1 ; //=== nal_unit_type
DEBUG_PRINT_LOW("@#@# Pos = %x NalType = %x buflen = %u", pos-1, nalu_type, (unsigned int) buffer_length);
isNewFrame = OMX_FALSE;
if (nalu_type == NAL_UNIT_VPS ||
nalu_type == NAL_UNIT_SPS ||
nalu_type == NAL_UNIT_PPS ||
nalu_type == NAL_UNIT_SEI) {
DEBUG_PRINT_LOW("Non-AU boundary with NAL type %d", nalu_type);
if (m_au_data) {
isNewFrame = OMX_TRUE;
m_au_data = false;
}
m_forceToStichNextNAL = true;
} else if (nalu_type <= NAL_UNIT_RESERVED_23) {
DEBUG_PRINT_LOW("AU Boundary with NAL type %d ", nalu_type);
if (!m_forceToStichNextNAL) {
bFirstSliceInPic = ((buffer[pos+2] & 0x80)>>7);
if (bFirstSliceInPic) { //=== first_ctb_in_slice is only 1'b1 coded tree block
DEBUG_PRINT_LOW("Found a New Frame due to 1st coded tree block");
isNewFrame = OMX_TRUE;
}
}
m_au_data = true;
m_forceToStichNextNAL = false;
}
DEBUG_PRINT_LOW("get_HEVC_nal_type - newFrame value %d",isNewFrame);
return true;
}