1 /*-------------------------------------------------------------------------- 2 Copyright (c) 2013, The Linux Foundation. All rights reserved. 3 4 Redistribution and use in source and binary forms, with or without 5 modification, are permitted provided that the following conditions are met: 6 * Redistributions of source code must retain the above copyright 7 notice, this list of conditions and the following disclaimer. 8 * Redistributions in binary form must reproduce the above copyright 9 notice, this list of conditions and the following disclaimer in the 10 documentation and/or other materials provided with the distribution. 11 * Neither the name of The Linux Foundation nor 12 the names of its contributors may be used to endorse or promote 13 products derived from this software without specific prior written 14 permission. 15 16 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 17 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 19 NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 20 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 21 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 22 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 23 OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 24 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 25 OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 26 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 --------------------------------------------------------------------------*/ 28 29 /*======================================================================== 30 31 O p e n M M 32 V i d e o U t i l i t i e s 33 34 *//** @file VideoUtils.cpp 35 This module contains utilities and helper routines. 36 37 @par EXTERNALIZED FUNCTIONS 38 39 @par INITIALIZATION AND SEQUENCING REQUIREMENTS 40 (none) 41 42 *//*====================================================================== */ 43 44 /* ======================================================================= 45 46 INCLUDE FILES FOR MODULE 47 48 ========================================================================== */ 49 #include "hevc_utils.h" 50 #include <string.h> 51 #include <stdlib.h> 52 #include <limits.h> 53 #include <sys/time.h> 54 #ifdef _ANDROID_ 55 #include <cutils/properties.h> 56 #endif 57 58 #define DEBUG_PRINT_LOW ALOGV 59 #define DEBUG_PRINT_ERROR ALOGE 60 61 62 /* ======================================================================= 63 64 DEFINITIONS AND DECLARATIONS FOR MODULE 65 66 This section contains definitions for constants, macros, types, variables 67 and other items needed by this module. 68 69 ========================================================================== */ 70 71 HEVC_Utils::HEVC_Utils() 72 { 73 initialize_frame_checking_environment(); 74 } 75 76 HEVC_Utils::~HEVC_Utils() 77 { 78 } 79 80 /***********************************************************************/ 81 /* 82 FUNCTION: 83 HEVC_Utils::initialize_frame_checking_environment 84 85 DESCRIPTION: 86 Extract RBSP data from a NAL 87 88 INPUT/OUTPUT PARAMETERS: 89 None 90 91 RETURN VALUE: 92 boolean 93 94 SIDE EFFECTS: 95 None. 96 */ 97 /***********************************************************************/ 98 void HEVC_Utils::initialize_frame_checking_environment() 99 { 100 m_forceToStichNextNAL = false; 101 m_au_data = false; 102 nalu_type = NAL_UNIT_INVALID; 103 } 104 105 /*=========================================================================== 106 FUNCTION: 107 HEVC_Utils::iSNewFrame 108 109 DESCRIPTION: 110 Returns true if NAL parsing successfull otherwise false. 111 112 INPUT/OUTPUT PARAMETERS: 113 <In> 114 buffer : buffer containing start code or nal length + NAL units 115 buffer_length : the length of the NAL buffer 116 start_code : If true, start code is detected, 117 otherwise size nal length is detected 118 size_of_nal_length_field: size of nal length field 119 <out> 120 isNewFrame: true if the NAL belongs to a differenet frame 121 false if the NAL belongs to a current frame 122 123 RETURN VALUE: 124 boolean true, if nal parsing is successful 125 false, if the nal parsing has errors 126 127 SIDE EFFECTS: 128 None. 129 ===========================================================================*/ 130 bool HEVC_Utils::isNewFrame(OMX_BUFFERHEADERTYPE *p_buf_hdr, 131 OMX_IN OMX_U32 size_of_nal_length_field, 132 OMX_OUT OMX_BOOL &isNewFrame) 133 { 134 OMX_IN OMX_U8 *buffer = p_buf_hdr->pBuffer; 135 OMX_IN OMX_U32 buffer_length = p_buf_hdr->nFilledLen; 136 byte bFirstSliceInPic = 0; 137 138 byte coef1=1, coef2=0, coef3=0; 139 uint32 pos = 0; 140 uint32 nal_len = buffer_length; 141 uint32 sizeofNalLengthField = 0; 142 uint32 zero_count; 143 boolean start_code = (size_of_nal_length_field==0)?true:false; 144 145 if (start_code) { 146 // Search start_code_prefix_one_3bytes (0x000001) 147 coef2 = buffer[pos++]; 148 coef3 = buffer[pos++]; 149 150 do { 151 if (pos >= buffer_length) { 152 DEBUG_PRINT_ERROR("ERROR: In %s() - line %d", __func__, __LINE__); 153 return false; 154 } 155 156 coef1 = coef2; 157 coef2 = coef3; 158 coef3 = buffer[pos++]; 159 } while (coef1 || coef2 || coef3 != 1); 160 } else if (size_of_nal_length_field) { 161 /* This is the case to play multiple NAL units inside each access unit*/ 162 /* Extract the NAL length depending on sizeOfNALength field */ 163 sizeofNalLengthField = size_of_nal_length_field; 164 nal_len = 0; 165 166 while (size_of_nal_length_field--) { 167 nal_len |= buffer[pos++]<<(size_of_nal_length_field<<3); 168 } 169 170 if (nal_len >= buffer_length) { 171 DEBUG_PRINT_ERROR("ERROR: In %s() - line %d", __func__, __LINE__); 172 return false; 173 } 174 } 175 176 if (nal_len > buffer_length) { 177 DEBUG_PRINT_ERROR("ERROR: In %s() - line %d", __func__, __LINE__); 178 return false; 179 } 180 181 if (pos + 2 > (nal_len + sizeofNalLengthField)) { 182 DEBUG_PRINT_ERROR("ERROR: In %s() - line %d", __func__, __LINE__); 183 return false; 184 } 185 186 nalu_type = (buffer[pos] & 0x7E)>>1 ; //=== nal_unit_type 187 188 DEBUG_PRINT_LOW("\n@#@# Pos = %x NalType = %x buflen = %d", pos-1, nalu_type, buffer_length); 189 190 isNewFrame = OMX_FALSE; 191 192 if (nalu_type == NAL_UNIT_VPS || 193 nalu_type == NAL_UNIT_SPS || 194 nalu_type == NAL_UNIT_PPS || 195 nalu_type == NAL_UNIT_SEI) { 196 DEBUG_PRINT_LOW("\n Non-AU boundary with NAL type %d", nalu_type); 197 198 if (m_au_data) { 199 isNewFrame = OMX_TRUE; 200 m_au_data = false; 201 } 202 203 m_forceToStichNextNAL = true; 204 } else if (nalu_type <= NAL_UNIT_RESERVED_23) { 205 DEBUG_PRINT_LOW("\n AU Boundary with NAL type %d ",nal_unit.nalu_type); 206 207 if (!m_forceToStichNextNAL) { 208 bFirstSliceInPic = ((buffer[pos+2] & 0x80)>>7); 209 210 if (bFirstSliceInPic) { //=== first_ctb_in_slice is only 1'b1 coded tree block 211 DEBUG_PRINT_LOW("Found a New Frame due to 1st coded tree block"); 212 isNewFrame = OMX_TRUE; 213 } 214 } 215 216 m_au_data = true; 217 m_forceToStichNextNAL = false; 218 } 219 220 DEBUG_PRINT_LOW("get_HEVC_nal_type - newFrame value %d\n",isNewFrame); 221 return true; 222 } 223 224
