frodovdr/vdr
1
0
Fork 0
mirror of https://github.com/VDR4Arch/vdr.git synced 2023-10-10 13:36:52 +02:00
Code Issues Releases Wiki Activity

Fixed PES recording

Browse Source
This commit is contained in:
Klaus Schmidinger 2000-12-10 11:00:00 +01:00
parent 4cd7c32425
commit be137ee37f
1 changed files with 41 additions and 52 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

93
dvbapi.c
View File

@ -4,7 +4,7 @@
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: dvbapi.c 1.42 2000/12/09 11:04:07 kls Exp $
* $Id: dvbapi.c 1.43 2000/12/10 11:00:00 kls Exp $
*/
#include "dvbapi.h"
@ -47,6 +47,7 @@ extern "C" {
#define SC_PICTURE 0x00
#define SC_BLOCK 0xBA
#define SC_AUDIO 0xC0
#define SC_VIDEO 0xE0
#define FRAMESPERSEC 25
@ -568,7 +569,7 @@ protected:
int GetStartCode(int Offset) { return (Byte(Offset) == 0x00 && Byte(Offset + 1) == 0x00 && Byte(Offset + 2) == 0x01) ? Byte(Offset + 3) : -1; }
int GetPictureType(int Offset) { return (Byte(Offset + 5) >> 3) & 0x07; }
int FindStartCode(uchar Code, int Offset = 0);
int FindPacketLength(int Offset = 0);
int GetAudioPacketLength(int Offset = 0);
public:
cFileBuffer(int *InFile, int *OutFile, const char *FileName, bool Recording, int Size, int FreeLimit = 0, int AvailLimit = 0);
virtual ~cFileBuffer();
@ -617,18 +618,10 @@ int cFileBuffer::FindStartCode(uchar Code, int Offset)
return -1;
}
int cFileBuffer::FindPacketLength(int Offset)
int cFileBuffer::GetAudioPacketLength(int Offset)
{
// Determines the length of the packet starting at offset.
int n = Available() - Offset;
for (int i = 1; i < n; i++) { // starts at 1 to exclude the current packet start code!
int c = GetStartCode(Offset + i);
if (c >= 0)
return i;
}
return n;
// Returns the entire length of the audio packet starting at offset.
return (Byte(Offset + 4) << 8) + Byte(Offset + 5) + 6;
}
// --- cRecordBuffer ---------------------------------------------------------
@ -729,42 +722,40 @@ int cRecordBuffer::Synchronize(void)
// Positions to the start of a data block (skipping everything up to
// an I-frame if not synced) and returns the block length.
int Length = 0;
int Skipped = 0;
int s;
while (Available() > MINVIDEODATA && (s = FindStartCode(SC_BLOCK)) >= 0) {
pictureType = NO_PICTURE;
Skipped += s;
Skip(s);
int PictureOffset = FindStartCode(SC_PICTURE);
if (PictureOffset >= 0) {
pictureType = GetPictureType(PictureOffset);
if (I_FRAME <= pictureType && pictureType <= B_FRAME) {
if (!synced && pictureType == I_FRAME) {
synced = true;
Skipped = 0;
}
if (synced && (Length = FindStartCode(SC_BLOCK, PictureOffset)) > 0) {
Length += PictureOffset;
break;
}
Length = 0;
}
else
esyslog(LOG_ERR, "ERROR: unknown picture type '%d'", pictureType);
pictureType = NO_PICTURE;
bool Block = false;
for (int i = 0; Available() > MINVIDEODATA && i < MINVIDEODATA; i++) {
if (Byte(i) == 0 && Byte(i + 1) == 0 && Byte(i + 2) == 1) {
switch (Byte(i + 3)) {
case SC_BLOCK: if (Block && synced)
return i; // found a block, so return its length
if (i) {
Skip(i);
if (synced)
esyslog(LOG_ERR, "ERROR: skipped %d bytes", i);
i = 0;
}
Block = true;
break;
case SC_PICTURE: if (Block) {
pictureType = GetPictureType(i);
switch (pictureType) {
case I_FRAME: synced = true;
case P_FRAME:
case B_FRAME: break;
default: esyslog(LOG_ERR, "ERROR: unknown picture type '%d'", pictureType);
pictureType = NO_PICTURE;
}
}
else
esyslog(LOG_ERR, "ERROR: picture header outside of block");
break;
case SC_AUDIO: i += GetAudioPacketLength(i) - 1; // -1 to compensate for i++ in the loop!
break;
}
else {
if (synced && (Length = FindStartCode(SC_BLOCK, 1)) > 0) {
Length++;
break;
}
}
Skip(1);
}
if (synced && Skipped)
esyslog(LOG_ERR, "ERROR: skipped %d bytes", Skipped);
return Length;
}
}
return 0; // no useful data found, wait for more
}
bool cRecordBuffer::NextFile(void)
@ -1157,10 +1148,8 @@ int cReplayBuffer::Read(int Max = -1)
if (mode != rmPlay) {
// delete the audio data in modes other than rmPlay:
int AudioOffset = FindStartCode(SC_AUDIO);
if (AudioOffset >= 0) {
int AudioLength = FindPacketLength(AudioOffset);
Set(AudioOffset, AudioLength, 0);
}
if (AudioOffset >= 0)
Set(AudioOffset, GetAudioPacketLength(AudioOffset), 0);
}
return readin;
}