2 #include <lib/dvb/tstools.h>
3 #include <lib/base/eerror.h>
9 eDVBTSTools::eDVBTSTools()
13 m_maxrange = 256*1024;
19 eDVBTSTools::~eDVBTSTools()
24 int eDVBTSTools::openFile(const char *filename)
27 m_fd = ::open(filename, O_RDONLY);
33 void eDVBTSTools::closeFile()
39 void eDVBTSTools::setSyncPID(int pid)
44 void eDVBTSTools::setSearchRange(int maxrange)
46 m_maxrange = maxrange;
49 int eDVBTSTools::getPTS(off_t &offset, pts_t &pts)
54 offset -= offset % 188;
56 // TODO: multiple files!
57 if (lseek(m_fd, offset, SEEK_SET) < 0)
60 int left = m_maxrange;
64 unsigned char block[188];
65 if (read(m_fd, block, 188) != 188)
76 offset = lseek(m_fd, i - 188, SEEK_CUR);
80 int pid = ((block[1] << 8) | block[2]) & 0x1FFF;
81 int pusi = !!(block[1] & 0x40);
83 // printf("PID %04x, PUSI %d\n", pid, pusi);
91 /* ok, now we have a PES header */
94 /* check for adaption field */
96 pes = block + block[4] + 4 + 1;
100 /* somehow not a startcode. (this is invalid, since pusi was set.) ignore it. */
101 if (pes[0] || pes[1] || (pes[2] != 1))
104 if (pes[7] & 0x80) /* PTS */
106 pts = ((unsigned long long)(pes[ 9]&0xE)) << 29;
107 pts |= ((unsigned long long)(pes[10]&0xFF)) << 22;
108 pts |= ((unsigned long long)(pes[11]&0xFE)) << 14;
109 pts |= ((unsigned long long)(pes[12]&0xFF)) << 7;
110 pts |= ((unsigned long long)(pes[13]&0xFE)) >> 1;
119 void eDVBTSTools::calcBegin()
126 if (!getPTS(m_offset_begin, m_pts_begin))
131 void eDVBTSTools::calcEnd()
136 m_offset_end = lseek(m_fd, 0, SEEK_END);
145 m_offset_end -= m_maxrange;
146 if (m_offset_end < 0)
148 if (!getPTS(m_offset_end, m_pts_end))
155 int eDVBTSTools::calcLen(pts_t &len)
157 calcBegin(); calcEnd();
158 if (!(m_begin_valid && m_end_valid))
160 len = m_pts_end - m_pts_begin;
164 int eDVBTSTools::calcBitrate()
166 calcBegin(); calcEnd();
167 if (!(m_begin_valid && m_end_valid))
170 pts_t len_in_pts = m_pts_end - m_pts_begin;
171 off_t len_in_bytes = m_offset_end - m_offset_begin;
176 unsigned long long bitrate = len_in_bytes * 90000 * 8 / len_in_pts;
177 if ((bitrate < 10000) || (bitrate > 100000000))