#include <stdio.h>
eDVBTSTools::eDVBTSTools()
+ :m_file_lock(true)
{
m_pid = -1;
m_maxrange = 256*1024;
m_samples_taken = 0;
+ eSingleLocker l(m_file_lock);
if (m_file.open(filename, 1) < 0)
return -1;
return 0;
void eDVBTSTools::closeFile()
{
+ eSingleLocker l(m_file_lock);
m_file.close();
}
return -1;
offset -= offset % 188;
-
+
+ eSingleLocker l(m_file_lock);
if (m_file.lseek(offset, SEEK_SET) < 0)
{
eDebug("lseek failed");
pts |= ((unsigned long long)(packet[ 9]&0xFF)) << 1;
pts |= ((unsigned long long)(packet[10]&0x80)) >> 7;
offset -= 188;
- eDebug("PCR found at %llx: %16llx", offset, pts);
+ eDebug("PCR %16llx found at %lld pid %02x (%02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x)", pts, offset, pid, packet[0], packet[1], packet[2], packet[3], packet[4], packet[5], packet[6], packet[7], packet[8], packet[9], packet[10]);
if (fixed && fixupPTS(offset, pts))
return -1;
return 0;
} else
payload = packet + 4;
-
/* if (m_pid >= 0)
if (pid != m_pid)
continue; */
if (!pusi)
continue;
-
-
+
/* somehow not a startcode. (this is invalid, since pusi was set.) ignore it. */
if (payload[0] || payload[1] || (payload[2] != 1))
continue;
-
+
+ if (payload[3] == 0xFD)
+ { // stream use extension mechanism defined in ISO 13818-1 Amendment 2
+ if (payload[7] & 1) // PES extension flag
+ {
+ int offs = 0;
+ if (payload[7] & 0x80) // pts avail
+ offs += 5;
+ if (payload[7] & 0x40) // dts avail
+ offs += 5;
+ if (payload[7] & 0x20) // escr avail
+ offs += 6;
+ if (payload[7] & 0x10) // es rate
+ offs += 3;
+ if (payload[7] & 0x8) // dsm trickmode
+ offs += 1;
+ if (payload[7] & 0x4) // additional copy info
+ offs += 1;
+ if (payload[7] & 0x2) // crc
+ offs += 2;
+ if (payload[8] < offs)
+ continue;
+ uint8_t pef = payload[9+offs++]; // pes extension field
+ if (pef & 1) // pes extension flag 2
+ {
+ if (pef & 0x80) // private data flag
+ offs += 16;
+ if (pef & 0x40) // pack header field flag
+ offs += 1;
+ if (pef & 0x20) // program packet sequence counter flag
+ offs += 2;
+ if (pef & 0x10) // P-STD buffer flag
+ offs += 2;
+ if (payload[8] < offs)
+ continue;
+ uint8_t stream_id_extension_len = payload[9+offs++] & 0x7F;
+ if (stream_id_extension_len >= 1)
+ {
+ if (payload[8] < (offs + stream_id_extension_len) )
+ continue;
+ if (payload[9+offs] & 0x80) // stream_id_extension_bit (should not set)
+ continue;
+ switch (payload[9+offs])
+ {
+ case 0x55 ... 0x5f: // VC-1
+ break;
+ case 0x71: // AC3 / DTS
+ break;
+ default:
+ eDebug("skip unknwn stream_id_extension %02x\n", payload[9+offs]);
+ continue;
+ }
+ }
+ else
+ continue;
+ }
+ else
+ continue;
+ }
+ else
+ continue;
+ }
/* drop non-audio, non-video packets because other streams
can be non-compliant.*/
- if (((payload[3] & 0xE0) != 0xC0) && // audio
- ((payload[3] & 0xF0) != 0xE0)) // video
+ else if (((payload[3] & 0xE0) != 0xC0) && // audio
+ ((payload[3] & 0xF0) != 0xE0)) // video
continue;
-
+
if (payload[7] & 0x80) /* PTS */
{
pts = ((unsigned long long)(payload[ 9]&0xE)) << 29;
pts |= ((unsigned long long)(payload[13]&0xFE)) >> 1;
offset -= 188;
-// eDebug("found pts %08llx at %08llx pid %02x stream: %02x", pts, offset, pid, payload[3]);
-
+ eDebug("PTS %16llx found at %lld pid %02x stream: %02x", pts, offset, pid, payload[3]);
+
/* convert to zero-based */
if (fixed && fixupPTS(offset, pts))
- return -1;
+ return -1;
return 0;
}
}
now -= pos;
return 0;
}
+ eDebug("eDVBTSTools::fixupPTS failed!");
+ return -1;
}
int eDVBTSTools::getOffset(off_t &offset, pts_t &pts, int marg)
{
+ eDebug("getOffset for pts 0x%llx", pts);
if (m_use_streaminfo)
{
if (pts >= m_pts_end && marg > 0 && m_end_valid)
{
if (!m_file.valid())
return;
-
+
+ eSingleLocker l(m_file_lock);
off_t end = m_file.lseek(0, SEEK_END);
if (llabs(end - m_last_filelength) > 1*1024*1024)
m_samples_taken = 1;
m_samples.clear();
pts_t dummy;
+ int retries=2;
+
if (calcLen(dummy) == -1)
return;
bytes_per_sample = 40*1024*1024;
bytes_per_sample -= bytes_per_sample % 188;
-
- for (off_t offset = m_offset_begin; offset < m_offset_end; offset += bytes_per_sample)
+
+ eDebug("samples step %lld, pts begin %llx, pts end %llx, offs begin %lld, offs end %lld:",
+ bytes_per_sample, m_pts_begin, m_pts_end, m_offset_begin, m_offset_end);
+
+ for (off_t offset = m_offset_begin; offset < m_offset_end;)
{
pts_t p;
- takeSample(offset, p);
+ if (takeSample(offset, p) && retries--)
+ continue;
+ retries = 2;
+ offset += bytes_per_sample;
}
m_samples[0] = m_offset_begin;
m_samples[m_pts_end - m_pts_begin] = m_offset_end;
-
-// eDebug("begin, end: %llx %llx", m_offset_begin, m_offset_end);
}
/* returns 0 when a sample was taken. */
int eDVBTSTools::takeSample(off_t off, pts_t &p)
{
+ off_t offset_org = off;
+
if (!eDVBTSTools::getPTS(off, p, 1))
{
/* as we are happily mixing PTS and PCR values (no comment, please), we might
{
if ((l->second > off) || (u->second < off))
{
- eDebug("ignoring sample %llx %llx %llx (%lld %lld %lld)",
+ eDebug("ignoring sample %lld %lld %lld (%llx %llx %llx)",
l->second, off, u->second, l->first, p, u->first);
return 1;
}
}
}
-
+ eDebug("adding sample %lld: pts 0x%llx -> pos %lld (diff %lld bytes)", offset_org, p, off, off-offset_org);
m_samples[p] = off;
return 0;
}
- return 1;
+ return -1;
}
int eDVBTSTools::findPMT(int &pmt_pid, int &service_id)
return -1;
}
+ eSingleLocker l(m_file_lock);
if (m_file.lseek(0, SEEK_SET) < 0)
{
eDebug("seek failed");
else if (direction == +1)
direction = 0;
}
- /* let's find the next frame after the given offset */
off_t start = offset;
+#if 0
+ /* backtrack to find the previous sequence start, in case of MPEG2 */
+ if ((data & 0xFF) == 0x00) {
+ do {
+ --start;
+ if (m_streaminfo.getStructureEntry(start, data, 0))
+ {
+ eDebug("get previous failed");
+ return -1;
+ }
+ } while (((data & 0xFF) != 9) && ((data & 0xFF) != 0x00) && ((data & 0xFF) != 0xB3)); /* sequence start or previous frame */
+ if ((data & 0xFF) != 0xB3)
+ start = offset; /* Failed to find corresponding sequence start, so never mind */
+ }
+
+#endif
+
+ /* let's find the next frame after the given offset */
do {
if (m_streaminfo.getStructureEntry(offset, data, 1))
{
// eDebug("%08llx@%llx (next)", data, offset);
} while (((data & 0xFF) != 9) && ((data & 0xFF) != 0x00)); /* next frame */
+#if 0
/* align to TS pkt start */
-// start = start - (start % 188);
-// offset = offset - (offset % 188);
+ start = start - (start % 188);
+ offset = offset - (offset % 188);
+#endif
len = offset - start;
_offset = start;
int eDVBTSTools::findNextPicture(off_t &offset, size_t &len, int &distance, int frame_types)
{
- int nr_frames = 0;
+ int nr_frames, direction;
// eDebug("trying to move %d frames at %llx", distance, offset);
frame_types = frametypeI; /* TODO: intelligent "allow IP frames when not crossing an I-Frame */
- int direction = distance > 0 ? 0 : -1;
- distance = abs(distance);
-
off_t new_offset = offset;
size_t new_len = len;
-
+ int first = 1;
+
+ if (distance > 0) {
+ direction = 0;
+ nr_frames = 0;
+ } else {
+ direction = -1;
+ nr_frames = -1;
+ distance = -distance+1;
+ }
while (distance > 0)
{
int dir = direction;
// eDebug("we moved %d, %d to go frames (now at %llx)", dir, distance, new_offset);
- if (distance >= 0)
+ if (distance >= 0 || direction == 0)
{
+ first = 0;
offset = new_offset;
len = new_len;
nr_frames += abs(dir);
+ }
+ else if (first) {
+ first = 0;
+ offset = new_offset;
+ len = new_len;
+ nr_frames += abs(dir) + distance; // never jump forward during rewind
}
}
projects / vuplus_dvbapp / blobdiff