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codec/h264/h264dec: simplified logic where there are things applicable to non-IDRs, which we don't handle yet.

This commit is contained in:
Saxon 2019-09-16 22:07:57 +09:30
parent 5939db6f1b
commit 117a75ae55
1 changed files with 7 additions and 12 deletions
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19
codec/h264/h264dec/decode.go
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@ -122,12 +122,12 @@ func decodePicOrderCntType1(vid *VideoStream, ctx *SliceContext) (topFieldOrderC
// TODO: this will be prevFrameNum when we do frames other than IDR.
_ = vid.priorPic.FrameNum
if vid.idrPicFlag {
vid.frameNumOffset = 0
} else {
if !vid.idrPicFlag {
panic("not implemented")
}
vid.frameNumOffset = 0
absFrameNum := 0
if ctx.NumRefFramesInPicOrderCntCycle != 0 {
absFrameNum = vid.frameNumOffset + ctx.FrameNum
@ -172,18 +172,13 @@ func decodePicOrderCntType2(vid *VideoStream, ctx *SliceContext) (topFieldOrderC
// TODO: this will be prevFrameNum when we do frames other than IDR.
_ = vid.priorPic.FrameNum
if vid.idrPicFlag {
vid.frameNumOffset = 0
} else {
if !vid.idrPicFlag {
panic("not implemented")
}
vid.frameNumOffset = 0
tempPicOrderCnt := 2 * (vid.frameNumOffset + ctx.FrameNum)
if vid.idrPicFlag {
tempPicOrderCnt = 0
} else if ctx.RefIdc == 0 {
tempPicOrderCnt = 2*(vid.frameNumOffset+ctx.FrameNum) - 1
}
// TODO: handle tempPicOrderCnt calculation for when not IDR.
var tempPicOrderCnt int
if !ctx.FieldPic {
topFieldOrderCnt = tempPicOrderCnt