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Update extras.

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This commit is contained in:
David Reid
2020-04-10 16:31:14 +10:00
parent 63c5cf851e
commit 376732929c
2 changed files with 34 additions and 12 deletions
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extras/dr_flac.h
+28 -3
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@@ -1,6 +1,6 @@
/*
FLAC audio decoder. Choice of public domain or MIT-0. See license statements at the end of this file.
dr_flac - v0.12.9 - 2020-04-05
dr_flac - v0.12.10 - 2020-04-10
David Reid - mackron@gmail.com
@@ -5879,6 +5879,14 @@ static drflac_bool32 drflac__seek_to_pcm_frame__seek_table(drflac* pFlac, drflac
iClosestSeekpoint = iSeekpoint;
}
/* There's been cases where the seek table contains only zeros. We need to do some basic validation on the closest seekpoint. */
if (pFlac->pSeekpoints[iClosestSeekpoint].pcmFrameCount == 0 || pFlac->pSeekpoints[iClosestSeekpoint].pcmFrameCount > pFlac->maxBlockSizeInPCMFrames) {
return DRFLAC_FALSE;
}
if (pFlac->pSeekpoints[iClosestSeekpoint].firstPCMFrame > pFlac->totalPCMFrameCount && pFlac->totalPCMFrameCount > 0) {
return DRFLAC_FALSE;
}
#if !defined(DR_FLAC_NO_CRC)
/* At this point we should know the closest seek point. We can use a binary search for this. We need to know the total sample count for this. */
if (pFlac->totalPCMFrameCount > 0) {
@@ -5888,9 +5896,23 @@ static drflac_bool32 drflac__seek_to_pcm_frame__seek_table(drflac* pFlac, drflac
byteRangeHi = pFlac->firstFLACFramePosInBytes + (drflac_uint64)((drflac_int64)(pFlac->totalPCMFrameCount * pFlac->channels * pFlac->bitsPerSample)/8.0f);
byteRangeLo = pFlac->firstFLACFramePosInBytes + pFlac->pSeekpoints[iClosestSeekpoint].flacFrameOffset;
/*
If our closest seek point is not the last one, we only need to search between it and the next one. The section below calculates an appropriate starting
value for byteRangeHi which will clamp it appropriately.
Note that the next seekpoint must have an offset greater than the closest seekpoint because otherwise our binary search algorithm will break down. There
have been cases where a seektable consists of seek points where every byte offset is set to 0 which causes problems. If this happens we need to abort.
*/
if (iClosestSeekpoint < pFlac->seekpointCount-1) {
if (pFlac->pSeekpoints[iClosestSeekpoint+1].firstPCMFrame != (((drflac_uint64)0xFFFFFFFF << 32) | 0xFFFFFFFF)) { /* Is it a placeholder seekpoint. */
byteRangeHi = pFlac->firstFLACFramePosInBytes + pFlac->pSeekpoints[iClosestSeekpoint+1].flacFrameOffset-1; /* Must be zero based. */
drflac_uint32 iNextSeekpoint = iClosestSeekpoint + 1;
/* Basic validation on the seekpoints to ensure they're usable. */
if (pFlac->pSeekpoints[iClosestSeekpoint].flacFrameOffset >= pFlac->pSeekpoints[iNextSeekpoint].flacFrameOffset || pFlac->pSeekpoints[iNextSeekpoint].pcmFrameCount == 0) {
return DRFLAC_FALSE; /* The next seekpoint doesn't look right. The seek table cannot be trusted from here. Abort. */
}
if (pFlac->pSeekpoints[iNextSeekpoint].firstPCMFrame != (((drflac_uint64)0xFFFFFFFF << 32) | 0xFFFFFFFF)) { /* Make sure it's not a placeholder seekpoint. */
byteRangeHi = pFlac->firstFLACFramePosInBytes + pFlac->pSeekpoints[iNextSeekpoint].flacFrameOffset - 1; /* byteRangeHi must be zero based. */
}
}
@@ -11692,6 +11714,9 @@ DRFLAC_API drflac_bool32 drflac_next_cuesheet_track(drflac_cuesheet_track_iterat
/*
REVISION HISTORY
================
v0.12.10 - 2020-04-10
- Fix some bugs when trying to seek with an invalid seek table.
v0.12.9 - 2020-04-05
- Fix warnings.