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oggstream: Fix default granuleshift usage

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For stream mappers that don't set a specific granuleshift, it will
have the default value of -1.

Protect the code for that and return the granule value as-is
This commit is contained in:
Edward Hervey 2017-11-04 11:29:52 +01:00 committed by Edward Hervey
parent 1172e5efc7
commit 2cf5d596ee
1 changed files with 2 additions and 2 deletions
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4
ext/ogg/gstoggstream.c
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@ -311,7 +311,7 @@ granulepos_to_granule_default (GstOggStream * pad, gint64 granulepos)
{ {
gint64 keyindex, keyoffset; gint64 keyindex, keyoffset;
if (pad->granuleshift != 0) { if (pad->granuleshift != 0 && pad->granuleshift != -1) {
keyindex = granulepos >> pad->granuleshift; keyindex = granulepos >> pad->granuleshift;
keyoffset = granulepos - (keyindex << pad->granuleshift); keyoffset = granulepos - (keyindex << pad->granuleshift);
return keyindex + keyoffset; return keyindex + keyoffset;
@ -327,7 +327,7 @@ granule_to_granulepos_default (GstOggStream * pad, gint64 granule,
{ {
gint64 keyoffset; gint64 keyoffset;
if (pad->granuleshift != 0) { if (pad->granuleshift != 0 && pad->granuleshift != -1) {
/* If we don't know where the previous keyframe is yet, assume it is /* If we don't know where the previous keyframe is yet, assume it is
at 0 or 1, depending on bitstream version. If nothing else, this at 0 or 1, depending on bitstream version. If nothing else, this
avoids getting negative granpos back. */ avoids getting negative granpos back. */