1 #include <lib/dvb/tstools.h>
2 #include <lib/base/eerror.h>
8 eDVBTSTools::eDVBTSTools()
12 m_maxrange = 256*1024;
20 eDVBTSTools::~eDVBTSTools()
25 int eDVBTSTools::openFile(const char *filename)
29 m_streaminfo.load((std::string(filename) + ".ap").c_str());
31 if (!m_streaminfo.empty())
36 m_fd = ::open(filename, O_RDONLY);
42 void eDVBTSTools::closeFile()
48 void eDVBTSTools::setSyncPID(int pid)
53 void eDVBTSTools::setSearchRange(int maxrange)
55 m_maxrange = maxrange;
58 /* getPTS extracts a pts value from any PID at a given offset. */
59 int eDVBTSTools::getPTS(off_t &offset, pts_t &pts)
65 int r = m_streaminfo.getPTS(off, p);
66 eDebug("streaminfo result: %d, %08llx, %08llx", r, off, p);
72 offset -= offset % 188;
74 // TODO: multiple files!
75 if (lseek(m_fd, offset, SEEK_SET) < 0)
78 int left = m_maxrange;
82 unsigned char block[188];
83 if (read(m_fd, block, 188) != 188)
97 offset = lseek(m_fd, i - 188, SEEK_CUR);
101 int pid = ((block[1] << 8) | block[2]) & 0x1FFF;
102 int pusi = !!(block[1] & 0x40);
104 // printf("PID %04x, PUSI %d\n", pid, pusi);
112 /* ok, now we have a PES header */
115 /* check for adaption field */
117 pes = block + block[4] + 4 + 1;
121 /* somehow not a startcode. (this is invalid, since pusi was set.) ignore it. */
122 if (pes[0] || pes[1] || (pes[2] != 1))
125 if (pes[7] & 0x80) /* PTS */
127 pts = ((unsigned long long)(pes[ 9]&0xE)) << 29;
128 pts |= ((unsigned long long)(pes[10]&0xFF)) << 22;
129 pts |= ((unsigned long long)(pes[11]&0xFE)) << 14;
130 pts |= ((unsigned long long)(pes[12]&0xFF)) << 7;
131 pts |= ((unsigned long long)(pes[13]&0xFE)) >> 1;
134 /* convert to zero-based */
135 fixupPTS(offset, pts);
136 eDebug("tstools result: %08llx, %08llx", offset, pts);
144 int eDVBTSTools::fixupPTS(const off_t &offset, pts_t &now)
146 if (m_use_streaminfo)
148 eDebug("streaminfo fixup, before %08llx", now);
149 int r = m_streaminfo.fixupPTS(offset, now);
150 eDebug("streaminfo fixup, after %08llx", now);
154 /* for the simple case, we assume one epoch, with up to one wrap around in the middle. */
158 if (getPTS(begin, pos))
160 if ((now < pos) && ((pos - now) < 90000 * 10))
165 if (now < pos) /* wrap around */
166 pos = now + 0x200000000LL - pos;
173 void eDVBTSTools::calcBegin()
181 if (!getPTS(m_offset_begin, m_pts_begin))
186 void eDVBTSTools::calcEnd()
191 off_t end = lseek(m_fd, 0, SEEK_END);
193 if (abs(end - m_offset_end) > 1*1024*1024)
197 eDebug("file size changed, recalc length");
207 m_offset_end -= m_maxrange;
208 if (m_offset_end < 0)
210 if (!getPTS(m_offset_end, m_pts_end))
217 int eDVBTSTools::calcLen(pts_t &len)
219 calcBegin(); calcEnd();
220 if (!(m_begin_valid && m_end_valid))
222 len = m_pts_end - m_pts_begin;
225 len += 0x200000000LL;
229 int eDVBTSTools::calcBitrate()
231 calcBegin(); calcEnd();
232 if (!(m_begin_valid && m_end_valid))
235 pts_t len_in_pts = m_pts_end - m_pts_begin;
239 len_in_pts += 0x200000000LL;
240 off_t len_in_bytes = m_offset_end - m_offset_begin;
245 unsigned long long bitrate = len_in_bytes * 90000 * 8 / len_in_pts;
246 if ((bitrate < 10000) || (bitrate > 100000000))