From e2de64d6f1beb9e492daf5b886e19933c1fa41dd Mon Sep 17 00:00:00 2001 From: toma Date: Wed, 25 Nov 2009 17:56:58 +0000 Subject: Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features. BUG:215923 git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdemultimedia@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da --- mpeglib/lib/mpegplay/mpegVideoHeader.cpp | 293 +++++++++++++++++++++++++++++++ 1 file changed, 293 insertions(+) create mode 100644 mpeglib/lib/mpegplay/mpegVideoHeader.cpp (limited to 'mpeglib/lib/mpegplay/mpegVideoHeader.cpp') diff --git a/mpeglib/lib/mpegplay/mpegVideoHeader.cpp b/mpeglib/lib/mpegplay/mpegVideoHeader.cpp new file mode 100644 index 00000000..e91401a8 --- /dev/null +++ b/mpeglib/lib/mpegplay/mpegVideoHeader.cpp @@ -0,0 +1,293 @@ +/* + stores sequence header info, for reinit of stream + Copyright (C) 2000 Martin Vogt + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU Library General Public License as published by + the Free Software Foundation. + + For more information look at the file COPYRIGHT in this package + + */ + + +#include "mpegVideoHeader.h" + +#include "mpegExtension.h" +#include "mpegVideoStream.h" + +#include + +using namespace std; + +/* Video rates table */ +/* Cheat on Vid rates, round to 30, and use 30 if illegal value + Except for 9, where Xing means 15, and given their popularity, we'll + be nice and do it */ + +static double VidRateNum[16]={29.97, 24, 24, 25, 29.97, 29.97, 50, 59.94, + 59.94, 14.985, 29.97, 29.97, 29.97, 29.97, + 29.97, 29.97}; + + + +static const unsigned char default_intra_matrix[64] = { + 8, 16, 19, 22, 26, 27, 29, 34, + 16, 16, 22, 24, 27, 29, 34, 37, + 19, 22, 26, 27, 29, 34, 34, 38, + 22, 22, 26, 27, 29, 34, 37, 40, + 22, 26, 27, 29, 32, 35, 40, 48, + 26, 27, 29, 32, 35, 40, 48, 58, + 26, 27, 29, 34, 38, 46, 56, 69, + 27, 29, 35, 38, 46, 56, 69, 83}; + + + +/* Set up array for fast conversion from zig zag order to row/column + coordinates. +*/ + +const int zigzag[64][2] = { + {0,0},{1,0},{0,1},{0,2},{1,1},{2,0},{3,0},{2,1},{1,2},{0,3},{0,4},{1,3}, + {2,2},{3,1},{4,0},{5,0},{4,1},{3,2},{2,3},{1,4},{0,5},{0,6},{1,5},{2,4}, + {3,3},{4,2},{5,1},{6,0},{7,0},{6,1},{5,2},{4,3},{3,4},{2,5},{1,6},{0,7}, + {1,7},{2,6},{3,5},{4,4},{5,3},{6,2},{7,1},{7,2},{6,3},{5,4},{4,5},{3,6}, + {2,7},{3,7},{4,6},{5,5},{6,4},{7,3},{7,4},{6,5},{5,6},{4,7},{5,7},{6,6}, + {7,5},{7,6},{6,7},{7,7} }; + + + + + +MpegVideoHeader::MpegVideoHeader() { + init(); + +} + + +void MpegVideoHeader::init() { + + h_size=0; + v_size=0; + mb_height=0; + mb_width=0; + mb_size=0; + aspect_ratio=0; + bit_rate=0; + vbv_buffer_size=0; + const_param_flag=0; + picture_rate=0.0; + extension=new MpegExtension(); + init_quanttables(); + +} + +void MpegVideoHeader::init_quanttables() { + int i; + int j; + + /* Copy default intra matrix. */ + + for (i = 0; i < 8; i++) { + for (j = 0; j < 8; j++) { + intra_quant_matrix[i][j]=default_intra_matrix[i*8+j]; + } + } + + /* Initialize non intra quantization matrix. */ + + for (i = 0; i < 8; i++) { + for (j = 0; j < 8; j++) { + non_intra_quant_matrix[i][j] = 16; + } + } +} + + +MpegVideoHeader::~MpegVideoHeader() { + + delete extension; + +} + + + +/* + *-------------------------------------------------------------- + * + * ParseSeqHead -- + * + * Assumes bit stream is at the END of the sequence + * header start code. Parses off the sequence header. + * + * Results: + * Fills the vid_stream structure with values derived and + * decoded from the sequence header. Allocates the pict image + * structures based on the dimensions of the image space + * found in the sequence header. + * + * Side effects: + * Bit stream irreversibly parsed off. + * + *-------------------------------------------------------------- + */ +int MpegVideoHeader::parseSeq(MpegVideoStream* mpegVideoStream) { + unsigned int data; + int i ; + + // seq_start_code already flushed!!! + + /* Get horizontal size of image space. */ + + h_size=mpegVideoStream->getBits(12); + + /* Get vertical size of image space. */ + + v_size=mpegVideoStream->getBits(12); + + + /* Calculate macroblock width and height of image space. */ + + mb_width = (h_size + 15) / 16; + mb_height = (v_size + 15) / 16; + mb_size=mb_height * mb_width-1; + + + + /* Parse of aspect ratio code. */ + + data=mpegVideoStream->getBits(4); + + aspect_ratio = (unsigned char) data; + + /* Parse off picture rate code. */ + + data=mpegVideoStream->getBits(4); + picture_rate=VidRateNum[data]; + + /* Parse off bit rate. */ + + data=mpegVideoStream->getBits(18); + bit_rate = data; + + /* Flush marker bit. */ + + mpegVideoStream->flushBits(1); + + /* Parse off vbv buffer size. */ + + data=mpegVideoStream->getBits(10); + vbv_buffer_size = data; + + /* Parse off contrained parameter flag. */ + + data=mpegVideoStream->getBits(1); + if (data) { + const_param_flag = true; + } else + const_param_flag = false; + + /* + * If intra_quant_matrix_flag set, parse off intra quant matrix values. + */ + data=mpegVideoStream->getBits(1); + if (data) { + for (i = 0; i < 64; i++) { + data=mpegVideoStream->getBits(8); + intra_quant_matrix[zigzag[i][1]][zigzag[i][0]]=(unsigned char)data; + } + } + /* + * If non intra quant matrix flag set, parse off non intra quant matrix + * values. + */ + + data=mpegVideoStream->getBits(1); + if (data) { + for (i = 0; i < 64; i++) { + data=mpegVideoStream->getBits(8); + + non_intra_quant_matrix[zigzag[i&0x3f][1]][zigzag[i&0x3f][0]]= + (unsigned char) data; + } + } + /* + * If next start code is extension/user start code, + * parse off extension data. + */ + extension->processExtensionData(mpegVideoStream); + + return true; + +} + + + + +void MpegVideoHeader::copyTo(MpegVideoHeader* dest) { + + + dest->h_size=h_size; + dest->v_size=v_size; + dest->mb_height=mb_height; + dest->mb_width=mb_width; + dest->mb_size=mb_size; + dest->aspect_ratio=aspect_ratio; + dest->bit_rate=bit_rate; + dest->vbv_buffer_size=vbv_buffer_size; + dest->const_param_flag=const_param_flag; + dest->picture_rate=picture_rate; + + int i; + int j; + + + /* Copy default intra matrix. */ + + for (i = 0; i < 8; i++) { + for (j = 0; j < 8; j++) { + dest->intra_quant_matrix[i][j]=intra_quant_matrix[i][j]; + + } + } + + /* Initialize non intra quantization matrix. */ + + for (i = 0; i < 8; i++) { + for (j = 0; j < 8; j++) { + dest->non_intra_quant_matrix[i][j] =non_intra_quant_matrix[i][j] ; + } + } + +} + + + + +double MpegVideoHeader::getPictureTime() { + if (picture_rate > 0) { + return 1.0/picture_rate; + } + return 0.0; +} + + + + + + + +void MpegVideoHeader::print(char* description) { + cout << "MpegVideoHeader [START]:"<