X-Git-Url: https://git.cweiske.de/enigma2.git/blobdiff_plain/544e1af49c6c1c25a3ef97b27ac3e6764a008824..d176ba17e809d7c8d917ba98efc79a12c604965e:/lib/dvb/tstools.cpp

diff --git a/lib/dvb/tstools.cpp b/lib/dvb/tstools.cpp
index bd7ebce2..06e8ba0f 100644
--- a/lib/dvb/tstools.cpp
+++ b/lib/dvb/tstools.cpp
@@ -32,7 +32,10 @@ int eDVBTSTools::openFile(const char *filename, int nostreaminfo)
 	closeFile();
 	
 	if (!nostreaminfo)
-		m_streaminfo.load((std::string(filename) + ".ap").c_str());
+	{
+		eDebug("loading streaminfo for %s", filename);
+		m_streaminfo.load(filename);
+	}
 	
 	if (!m_streaminfo.empty())
 		m_use_streaminfo = 1;
@@ -68,7 +71,8 @@ void eDVBTSTools::setSearchRange(int maxrange)
 int eDVBTSTools::getPTS(off_t &offset, pts_t &pts, int fixed)
 {
 	if (m_use_streaminfo)
-		return m_streaminfo.getPTS(offset, pts);
+		if (!m_streaminfo.getPTS(offset, pts))
+			return 0;
 	
 	if (!m_file.valid())
 		return -1;
@@ -141,9 +145,9 @@ int eDVBTSTools::getPTS(off_t &offset, pts_t &pts, int fixed)
 			payload = packet + 4;
 
 		
-		if (m_pid >= 0)
+/*		if (m_pid >= 0)
 			if (pid != m_pid)
-				continue;
+				continue; */
 		if (!pusi)
 			continue;
 		
@@ -183,7 +187,8 @@ int eDVBTSTools::fixupPTS(const off_t &offset, pts_t &now)
 {
 	if (m_use_streaminfo)
 	{
-		return m_streaminfo.fixupPTS(offset, now);
+		if (!m_streaminfo.fixupPTS(offset, now))
+			return 0;
 	} else
 	{
 			/* for the simple case, we assume one epoch, with up to one wrap around in the middle. */
@@ -562,3 +567,125 @@ int eDVBTSTools::findPMT(int &pmt_pid, int &service_id)
 	
 	return -1;
 }
+
+int eDVBTSTools::findFrame(off_t &_offset, size_t &len, int &direction, int frame_types)
+{
+	off_t offset = _offset;
+	int nr_frames = 0;
+//	eDebug("trying to find iFrame at %llx", offset);
+
+	if (!m_use_streaminfo)
+	{
+//		eDebug("can't get next iframe without streaminfo");
+		return -1;
+	}
+
+				/* let's find the iframe before the given offset */
+	unsigned long long data;
+	
+	if (direction < 0)
+		offset--;
+
+	while (1)
+	{
+		if (m_streaminfo.getStructureEntry(offset, data, (direction == 0) ? 1 : 0))
+		{
+			eDebug("getting structure info for origin offset failed.");
+			return -1;
+		}
+		if (offset == 0x7fffffffffffffffLL) /* eof */
+		{
+			eDebug("reached eof");
+			return -1;
+		}
+			/* data is usually the start code in the lower 8 bit, and the next byte <<8. we extract the picture type from there */
+			/* we know that we aren't recording startcode 0x09 for mpeg2, so this is safe */
+			/* TODO: check frame_types */
+		int is_start = (data & 0xE0FF) == 0x0009; /* H.264 NAL unit access delimiter with I-frame*/
+		is_start |= (data & 0x3800FF) == 0x080000; /* MPEG2 picture start code with I-frame */
+		
+		int is_frame = ((data & 0xFF) == 0x0009) || ((data & 0xFF) == 0x00); /* H.264 UAD or MPEG2 start code */
+		
+		if (is_frame)
+		{
+			if (direction < 0)
+				--nr_frames;
+			else
+				++nr_frames;
+		}
+//		eDebug("%08llx@%llx -> %d, %d", data, offset, is_start, nr_frames);
+		if (is_start)
+			break;
+
+		if (direction == -1)
+			--offset; /* move to previous entry */
+		else if (direction == +1)
+			direction = 0;
+	}
+			/* let's find the next frame after the given offset */
+	off_t start = offset;
+
+	do {
+		if (m_streaminfo.getStructureEntry(offset, data, 1))
+		{
+			eDebug("get next failed");
+			return -1;
+		}
+		if (offset == 0x7fffffffffffffffLL) /* eof */
+		{
+			eDebug("reached eof (while looking for end of iframe)");
+			return -1;
+		}
+//		eDebug("%08llx@%llx (next)", data, offset);
+	} while (((data & 0xFF) != 9) && ((data & 0xFF) != 0x00)); /* next frame */
+
+			/* align to TS pkt start */
+//	start = start - (start % 188);
+//	offset = offset - (offset % 188);
+
+	len = offset - start;
+	_offset = start;
+	direction = nr_frames;
+//	eDebug("result: offset=%llx, len: %ld", offset, (int)len);
+	return 0;
+}
+
+int eDVBTSTools::findNextPicture(off_t &offset, size_t &len, int &distance, int frame_types)
+{
+	int nr_frames = 0;
+//	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;
+	
+	while (distance > 0)
+	{
+		int dir = direction;
+		if (findFrame(new_offset, new_len, dir, frame_types))
+		{
+//			eDebug("findFrame failed!\n");
+			return -1;
+		}
+		
+		distance -= abs(dir);
+		
+//		eDebug("we moved %d, %d to go frames (now at %llx)", dir, distance, new_offset);
+
+		if (distance >= 0)
+		{
+			offset = new_offset;
+			len = new_len;
+			nr_frames += abs(dir);
+		}
+	}
+
+	distance = (direction < 0) ? -nr_frames : nr_frames;
+//	eDebug("in total, we moved %d frames", nr_frames);
+
+	return 0;
+}