Jackal wrote:
Why is it counting 150 sectors as part of write offset? Is it a bug?
As it is written in the comment of http://redump.org/disc/77974/ , these discs start AMSF 00:00:00, not 00:02:00. Due to this problem, there is not the sync in the last 150 data sectors. EccEdc judges it as error.
Jackal wrote:
Here is my proposed method for automatic offset detection for Audio CD's:
I translate the src I already coded to English. Thanks to Intothisworld, perhaps it's almost coded except -10.000 to +10.000 samples you say.
I hope to test the latest version of the https://github.com/saramibreak/DiscImag … /issues/95 to more people.
1. Check the non-zero byte position from last - 75 to last + 75.
2. Check the non-zero byte position from LBA 0 - 75 to LBA 0 + 75.
3-1. If the difference of the last non-zero byte position and 1st non-zero byte position are bigger than 0 sample and smaller than 588 samples...
3-1-1. If the last non-zero byte position is equal to the 1st non-zero byte position, Set the custom offset.
3-1-2. If the last non-zero byte position is bigger than the 1st non-zero byte position, It can't set the custom offset.
3-1-3. If the last non-zero byte position is smaller than the 1st non-zero byte position.
3-1-3-1. If the 1st non-zero byte position is smaller than the combined offset, Set the custom offset.
3-1-3-2. If not 3-1-3-1, it's no need to fix the combined offset.
3-2. If the difference of the last non-zero byte position and 1st non-zero byte position are bigger than 588 samples... (last < 1st)
3-2-1. If the last non-zero byte exists in the last sector or lead-out and the 1st non-zero byte exists in the LBA 0 or backward.
3-2-1-1. If the last non-zero byte position exists in the last sector and its position is smaller than the combined offset, it's no need to fix the combined offset.
3-2-1-2. If not 3-2-1-1, set the custom offset.
3-2-2. If the last non-zero byte exists in the forward than the last sector and the 1st non-zero byte exists in the LBA 0 or backward.
3-2-2-1. If the 1st non-zero byte exists in the LBA 0 and the 1st non-zero byte position is smaller than the combined offset, Set the custom offset.
3-2-2-2. If not 3-2-2-1, it's no need to fix the combined offset.
3-2-3. If the last non-zero byte exists in the forward than the last sector and the 1st non-zero byte exists in the pregap sector, Set the custom offset.
3-3. If the difference of the last non-zero byte position and 1st non-zero byte position are bigger than 588 samples... (1st < last)
3-3-1. If the 1st non-zero byte exists in the LBA 0 or backward and the last non-zero byte exists in the last sector or lead-out, it can't set the custom offset.
3-3-2. If the 1st non-zero byte exists in the pregap and the last non-zero byte exists in the last sector or lead-out, it can't set the custom offset.
3-3-3. If the last non-zero byte exists in the last sector and the last non-zero byte position is smaller than the combined offset, it's no need to fix the combined offset.
3-3-4. if not 3-3-3, set the custom offset.
3-3-5. If the 1st non-zero byte exists in the pregap and the last non-zero byte exists in the forward than the last sector, it can't set the custom offset.
3-3-6. If not 3-3-5, it's no need to fix the combined offset.