Merge commit 'origin/bug_449_fix_wlan_usbstick_recognition'

[enigma2.git] / lib / dvb / tstools.cpp

diff --git a/lib/dvb/tstools.cpp b/lib/dvb/tstools.cpp
index 00a1da72a8e8e3fb328e21aaf2e3c28bfdb3b5a0..d5ad24940714a3d4c048f48622d7c36ea1bc3272 100644 (file)
--- a/lib/dvb/tstools.cpp
+++ b/lib/dvb/tstools.cpp
@@ -7,6 +7,7 @@
 #include <stdio.h>
 
 eDVBTSTools::eDVBTSTools()
+       :m_file_lock(true)
 {
        m_pid = -1;
        m_maxrange = 256*1024;
@@ -47,6 +48,7 @@ int eDVBTSTools::openFile(const char *filename, int nostreaminfo)
        
        m_samples_taken = 0;
 
+       eSingleLocker l(m_file_lock);
        if (m_file.open(filename, 1) < 0)
                return -1;
        return 0;
@@ -54,6 +56,7 @@ int eDVBTSTools::openFile(const char *filename, int nostreaminfo)
 
 void eDVBTSTools::closeFile()
 {
+       eSingleLocker l(m_file_lock);
        m_file.close();
 }
 
@@ -78,7 +81,8 @@ int eDVBTSTools::getPTS(off_t &offset, pts_t &pts, int fixed)
                return -1;
 
        offset -= offset % 188;
-       
+
+       eSingleLocker l(m_file_lock);
        if (m_file.lseek(offset, SEEK_SET) < 0)
        {
                eDebug("lseek failed");
@@ -144,24 +148,83 @@ int eDVBTSTools::getPTS(off_t &offset, pts_t &pts, int fixed)
                } 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;
@@ -358,7 +421,8 @@ void eDVBTSTools::calcEnd()
 {
        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)
@@ -515,6 +579,7 @@ 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");
@@ -663,18 +728,23 @@ int eDVBTSTools::findFrame(off_t &_offset, size_t &len, int &direction, int fram
 
 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;
@@ -688,12 +758,18 @@ int eDVBTSTools::findNextPicture(off_t &offset, size_t &len, int &distance, int
                
 //             eDebug("we moved %d, %d to go frames (now at %llx)", dir, distance, new_offset);
 
-               if (distance >= 0 || first)
+               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
                }
        }