(disabled) timebase change mode for better trickmode timing

diff --git a/lib/dvb/dvb.cpp b/lib/dvb/dvb.cpp
index 0eb614db0626d34aa9181f1a0d626e16e8b9f339..6f72cb1703b1dce919a26cd559384b158c43d212 100644 (file)
--- a/lib/dvb/dvb.cpp
+++ b/lib/dvb/dvb.cpp
@@ -751,21 +751,107 @@ error:
 class eDVBChannelFilePush: public eFilePushThread
 {
 public:
+       eDVBChannelFilePush() { setIFrameSearch(0); setTimebaseChange(0); }
        void setIFrameSearch(int enabled) { m_iframe_search = enabled; m_iframe_state = 0; }
+
+                       /* "timebase change" is for doing trickmode playback at an exact speed, even when pictures are skipped. */
+                       /* you need to set it to 1/16 if you want 16x playback, for example. you need video master sync. */
+       void setTimebaseChange(int ratio) { m_timebase_change = ratio; } /* 16bit fixpoint, 0 for disable */
 protected:
        int m_iframe_search, m_iframe_state, m_pid;
+       int m_timebase_change;
        int filterRecordData(const unsigned char *data, int len, size_t &current_span_remaining);
 };
 
 int eDVBChannelFilePush::filterRecordData(const unsigned char *_data, int len, size_t &current_span_remaining)
 {
-#if 0 /* not yet */
+#if 0
+       if (m_timebase_change)
+       {
+               eDebug("timebase change: %d", m_timebase_change);
+               int offset;
+               for (offset = 0; offset < len; offset += 188)
+               {
+                       unsigned char *pkt = (unsigned char*)_data + offset;
+                       if (pkt[1] & 0x40) /* pusi */
+                       {
+                               if (pkt[3] & 0x20) // adaption field present?
+                                       pkt += pkt[4] + 4 + 1;  /* skip adaption field and header */
+                               else
+                                       pkt += 4; /* skip header */
+                               if (pkt[0] || pkt[1] || (pkt[2] != 1))
+                               {
+                                       eWarning("broken startcode");
+                                       continue;
+                               }
+
+                               pts_t pts = 0;
+
+                               if (pkt[7] & 0x80) // PTS present?
+                               {
+                                       pts  = ((unsigned long long)(pkt[ 9]&0xE))  << 29;
+                                       pts |= ((unsigned long long)(pkt[10]&0xFF)) << 22;
+                                       pts |= ((unsigned long long)(pkt[11]&0xFE)) << 14;
+                                       pts |= ((unsigned long long)(pkt[12]&0xFF)) << 7;
+                                       pts |= ((unsigned long long)(pkt[13]&0xFE)) >> 1;
+
+#if 0
+                                       off_t off = 0;
+                                       RESULT r = m_tstools.fixupPTS(off, pts);
+                                       if (r)
+                                               eWarning("fixup PTS while trickmode playback failed.\n");
+#endif
+
+                                       int sec = pts / 90000;
+                                       int frm = pts % 90000;
+                                       int min = sec / 60;
+                                       sec %= 60;
+                                       int hr = min / 60;
+                                       min %= 60;
+                                       int d = hr / 24;
+                                       hr %= 24;
+
+//                                     eDebug("original, fixed pts: %016llx %d:%02d:%02d:%02d:%05d", pts, d, hr, min, sec, frm);
+
+                                       pts += 0x80000000LL;
+                                       pts *= m_timebase_change;
+                                       pts >>= 16;
+
+                                       sec = pts / 90000;
+                                       frm = pts % 90000;
+                                       min = sec / 60;
+                                       sec %= 60;
+                                       hr = min / 60;
+                                       min %= 60;
+                                       d = hr / 24;
+                                       hr %= 24;
+
+//                                     eDebug("new pts (after timebase change): %016llx %d:%02d:%02d:%02d:%05d", pts, d, hr, min, sec, frm);
+
+                                       pkt[9] &= ~0xE;
+                                       pkt[10] = 0;
+                                       pkt[11] &= ~1;
+                                       pkt[12] = 0;
+                                       pkt[13] &= ~1;
+
+                                       pkt[9]  |= (pts >> 29) & 0xE;
+                                       pkt[10] |= (pts >> 22) & 0xFF;
+                                       pkt[11] |= (pts >> 14) & 0xFE;
+                                       pkt[12] |= (pts >> 7) & 0xFF;
+                                       pkt[13] |= (pts << 1) & 0xFE;
+                               }
+                       }
+               }
+       }
+#endif
+
+#if 1 /* not yet */
        if (!m_iframe_search)
                return len;
 
        unsigned char *data = (unsigned char*)_data; /* remove that const. we know what we are doing. */
 
-       eDebug("filterRecordData, size=%d (mod 188=%d), first byte is %02x", len, len %188, data[0]);
+//     eDebug("filterRecordData, size=%d (mod 188=%d), first byte is %02x", len, len %188, data[0]);
 
        unsigned char *d = data;
        while ((d = (unsigned char*)memmem(d, data + len - d, "\x00\x00\x01", 3)))
@@ -779,8 +865,8 @@ int eDVBChannelFilePush::filterRecordData(const unsigned char *_data, int len, s
                {
                        int picture_type = (d[5] >> 3) & 7;
                        d += 4;
-                       
-                       eDebug("%d-frame at %d, offset in TS packet: %d, pid=%04x", picture_type, offset, offset % 188, pid);
+
+//                     eDebug("%d-frame at %d, offset in TS packet: %d, pid=%04x", picture_type, offset, offset % 188, pid);
 
                        if (m_iframe_state == 1)
                        {
@@ -802,19 +888,19 @@ int eDVBChannelFilePush::filterRecordData(const unsigned char *_data, int len, s
                        {
                                if (picture_type != 1) /* we are only interested in I frames */
                                        continue;
-                       
+
                                unsigned char *fts = data;
                                while (fts < ts)
                                {
                                        fts[1] |= 0x1f;
                                        fts[2] |= 0xff; /* drop packet */
-                               
+
                                        fts += 188;
                                }
                                                /* force payload only */
                                ts[3] &= ~0x30;
                                ts[3] |=  0x10;
-                               
+
 //                             memset(ts + 4, 0xFF, (offset % 188) - 4);
 
                                m_iframe_state = 1;
@@ -948,18 +1034,17 @@ void eDVBChannel::cueSheetEvent(int event)
                                                /* i agree that this might look a bit like black magic. */
                                m_skipmode_n = 512*1024; /* must be 1 iframe at least. */
                                m_skipmode_m = bitrate / 8 / 90000 * m_cue->m_skipmode_ratio / 8;
-                               
+
                                if (m_cue->m_skipmode_ratio < 0)
                                        m_skipmode_m -= m_skipmode_n;
-       
+
                                eDebug("resolved to: %d %d", m_skipmode_m, m_skipmode_n);
-                               
+
                                if (abs(m_skipmode_m) < abs(m_skipmode_n))
                                {
                                        eWarning("something is wrong with this calculation");
                                        m_skipmode_n = m_skipmode_m = 0;
                                }
-                               
                        } else
                        {
                                eDebug("skipmode ratio is 0, normal play");
@@ -968,6 +1053,10 @@ void eDVBChannel::cueSheetEvent(int event)
                }
                ASSERT(m_pvr_thread);
                m_pvr_thread->setIFrameSearch(m_skipmode_n != 0);
+               if (m_cue->m_skipmode_ratio != 0)
+                       m_pvr_thread->setTimebaseChange(0x10000 * 9000 / (m_cue->m_skipmode_ratio / 10)); /* negative values are also ok */
+               else
+                       m_pvr_thread->setTimebaseChange(0); /* normal playback */
                eDebug("flush pvr");
                flushPVR(m_cue->m_decoding_demux);
                eDebug("done");
@@ -1477,6 +1566,7 @@ void eCueSheet::clear()
 
 void eCueSheet::addSourceSpan(const pts_t &begin, const pts_t &end)
 {
+       assert(begin < end);
        m_lock.WrLock();
        m_spans.push_back(std::pair<pts_t, pts_t>(begin, end));
        m_lock.Unlock();