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Fixed detecting frames on channels that broadcast with separate "fields" instead of complete frames

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This commit is contained in:
Klaus Schmidinger 2011-03-20 10:22:22 +01:00
parent 22f70b02e2
commit d1dd7df17a
3 changed files with 42 additions and 9 deletions
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4
HISTORY
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@ -6557,8 +6557,10 @@ Video Disk Recorder Revision History
- The original display size of subtitles is now used to scale them properly when
displaying them on an HD OSD.
2011-03-13: Version 1.7.18
2011-03-20: Version 1.7.18
- Changed -O2 to -O3 in Make.config.template (reported by Matti Lehtimäki).
- Added a missing 'default' case in cPixmapMemory::DrawEllipse().
- Fixed some direct comparisons of double values.
- Fixed detecting frames on channels that broadcast with separate "fields" instead
of complete frames.

40
remux.c
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@ -4,7 +4,7 @@
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: remux.c 2.52 2011/03/13 13:57:09 kls Exp $
* $Id: remux.c 2.53 2011/03/20 10:21:14 kls Exp $
*/
#include "remux.h"
@ -783,9 +783,11 @@ cFrameDetector::cFrameDetector(int Pid, int Type)
synced = false;
newFrame = independentFrame = false;
numPtsValues = 0;
numFrames = 0;
numIFrames = 0;
framesPerSecond = 0;
framesInPayloadUnit = framesPerPayloadUnit = 0;
payloadUnitOfFrame = 0;
scanning = false;
scanner = EMPTY_SCANNER;
}
@ -807,6 +809,7 @@ void cFrameDetector::SetPid(int Pid, int Type)
void cFrameDetector::Reset(void)
{
newFrame = independentFrame = false;
payloadUnitOfFrame = 0;
scanning = false;
scanner = EMPTY_SCANNER;
}
@ -844,6 +847,7 @@ int cFrameDetector::Analyze(const uchar *Data, int Length)
dbgframes("#");
numPtsValues = 0;
numIFrames = 0;
numFrames = 0;
}
else
numPtsValues++;
@ -863,10 +867,23 @@ int cFrameDetector::Analyze(const uchar *Data, int Length)
framesPerSecond = 25.0;
else if (Delta % 3003 == 0)
framesPerSecond = 30.0 / 1.001;
else if (abs(Delta - 1800) <= 1)
framesPerSecond = 50.0;
else if (abs(Delta - 1800) <= 1) {
if (numFrames > 50) {
// this is a "best guess": if there are more than 50 frames between two I-frames, we assume each "frame" actually contains a "field", so two "fields" make one "frame"
framesPerSecond = 25.0;
framesPerPayloadUnit = -2;
}
else
framesPerSecond = 50.0;
}
else if (Delta == 1501)
framesPerSecond = 60.0 / 1.001;
if (numFrames > 50) {
// this is a "best guess": if there are more than 50 frames between two I-frames, we assume each "frame" actually contains a "field", so two "fields" make one "frame"
framesPerSecond = 30.0 / 1.001;
framesPerPayloadUnit = -2;
}
else
framesPerSecond = 60.0 / 1.001;
else {
framesPerSecond = 25.0;
dsyslog("unknown frame delta (%d), assuming 25 fps", Delta);
@ -874,7 +891,7 @@ int cFrameDetector::Analyze(const uchar *Data, int Length)
}
else // audio
framesPerSecond = 90000.0 / Delta; // PTS of audio frames is always increasing
dbgframes("\nDelta = %d FPS = %5.2f FPPU = %d\n", Delta, framesPerSecond, framesPerPayloadUnit);
dbgframes("\nDelta = %d FPS = %5.2f FPPU = %d NF = %d\n", Delta, framesPerSecond, framesPerPayloadUnit, numFrames);
}
}
scanner = EMPTY_SCANNER;
@ -909,6 +926,8 @@ int cFrameDetector::Analyze(const uchar *Data, int Length)
framesInPayloadUnit++;
if (independentFrame)
numIFrames++;
if (numIFrames == 1)
numFrames++;
dbgframes("%d ", (Data[i + 2] >> 3) & 0x07);
}
if (synced)
@ -923,6 +942,13 @@ int cFrameDetector::Analyze(const uchar *Data, int Length)
newFrame = true;
independentFrame = Data[i + 1] == 0x10;
if (synced) {
if (framesPerPayloadUnit < 0) {
payloadUnitOfFrame = (payloadUnitOfFrame + 1) % -framesPerPayloadUnit;
if (payloadUnitOfFrame != 0 && independentFrame)
payloadUnitOfFrame = 0;
if (payloadUnitOfFrame)
newFrame = false;
}
if (framesPerPayloadUnit <= 1)
scanning = false;
}
@ -930,6 +956,8 @@ int cFrameDetector::Analyze(const uchar *Data, int Length)
framesInPayloadUnit++;
if (independentFrame)
numIFrames++;
if (numIFrames == 1)
numFrames++;
dbgframes("%02X ", Data[i + 1]);
}
if (synced)
@ -955,7 +983,7 @@ int cFrameDetector::Analyze(const uchar *Data, int Length)
}
if (!synced && framesPerSecond > 0.0 && independentFrame) {
synced = true;
dbgframes("*");
dbgframes("*\n");
Reset();
return Processed + TS_SIZE;
}

7
remux.h
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@ -4,7 +4,7 @@
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: remux.h 2.27 2010/11/01 11:24:20 kls Exp $
* $Id: remux.h 2.28 2011/03/19 16:52:46 kls Exp $
*/
#ifndef __REMUX_H
@ -345,12 +345,15 @@ private:
bool independentFrame;
uint32_t ptsValues[MaxPtsValues]; // 32 bit is enough - we only need the delta
int numPtsValues;
int numFrames;
int numIFrames;
bool isVideo;
double framesPerSecond;
int framesInPayloadUnit;
int framesPerPayloadUnit; // Some broadcasters send one frame per payload unit (== 1),
// while others put an entire GOP into one payload unit (> 1).
// some put an entire GOP into one payload unit (> 1), and
// some spread a single frame over several payload units (< 0).
int payloadUnitOfFrame;
bool scanning;
uint32_t scanner;
public: