1 #include <lib/dvb/tstools.h>
2 #include <lib/base/eerror.h>
8 eDVBTSTools::eDVBTSTools()
12 m_maxrange = 256*1024;
18 eDVBTSTools::~eDVBTSTools()
23 int eDVBTSTools::openFile(const char *filename)
26 m_fd = ::open(filename, O_RDONLY);
32 void eDVBTSTools::closeFile()
38 void eDVBTSTools::setSyncPID(int pid)
43 void eDVBTSTools::setSearchRange(int maxrange)
45 m_maxrange = maxrange;
48 int eDVBTSTools::getPTS(off_t &offset, pts_t &pts)
53 offset -= offset % 188;
55 // TODO: multiple files!
56 if (lseek(m_fd, offset, SEEK_SET) < 0)
59 int left = m_maxrange;
63 unsigned char block[188];
64 if (read(m_fd, block, 188) != 188)
78 offset = lseek(m_fd, i - 188, SEEK_CUR);
82 int pid = ((block[1] << 8) | block[2]) & 0x1FFF;
83 int pusi = !!(block[1] & 0x40);
85 // printf("PID %04x, PUSI %d\n", pid, pusi);
93 /* ok, now we have a PES header */
96 /* check for adaption field */
98 pes = block + block[4] + 4 + 1;
102 /* somehow not a startcode. (this is invalid, since pusi was set.) ignore it. */
103 if (pes[0] || pes[1] || (pes[2] != 1))
106 if (pes[7] & 0x80) /* PTS */
108 pts = ((unsigned long long)(pes[ 9]&0xE)) << 29;
109 pts |= ((unsigned long long)(pes[10]&0xFF)) << 22;
110 pts |= ((unsigned long long)(pes[11]&0xFE)) << 14;
111 pts |= ((unsigned long long)(pes[12]&0xFF)) << 7;
112 pts |= ((unsigned long long)(pes[13]&0xFE)) >> 1;
121 void eDVBTSTools::calcBegin()
129 if (!getPTS(m_offset_begin, m_pts_begin))
134 void eDVBTSTools::calcEnd()
139 m_offset_end = lseek(m_fd, 0, SEEK_END);
148 m_offset_end -= m_maxrange;
149 if (m_offset_end < 0)
151 if (!getPTS(m_offset_end, m_pts_end))
158 int eDVBTSTools::calcLen(pts_t &len)
160 calcBegin(); calcEnd();
161 if (!(m_begin_valid && m_end_valid))
163 len = m_pts_end - m_pts_begin;
167 int eDVBTSTools::calcBitrate()
169 calcBegin(); calcEnd();
170 if (!(m_begin_valid && m_end_valid))
173 pts_t len_in_pts = m_pts_end - m_pts_begin;
174 off_t len_in_bytes = m_offset_end - m_offset_begin;
179 unsigned long long bitrate = len_in_bytes * 90000 * 8 / len_in_pts;
180 if ((bitrate < 10000) || (bitrate > 100000000))