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improve h264 decode examples

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This commit is contained in:
aler9
2022-02-01 17:29:45 +01:00
parent 3eda3e45e6
commit db69235e30
4 changed files with 40 additions and 26 deletions
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14
examples/client-read-h264-convert-to-jpeg/h264decoder.go
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@@ -106,12 +106,6 @@ func (d *h264Decoder) decode(nalu []byte) (image.Image, error) {
C.sws_freeContext(d.swsCtx)
}
d.swsCtx = C.sws_getContext(d.srcFrame.width, d.srcFrame.height, C.AV_PIX_FMT_YUV420P, // d.codecCtx.pix_fmt,
d.srcFrame.width, d.srcFrame.height, C.AV_PIX_FMT_RGBA, C.SWS_BILINEAR, nil, nil, nil)
if d.swsCtx == nil {
return nil, fmt.Errorf("sws_getContext() err")
}
d.dstFrame = C.av_frame_alloc()
d.dstFrame.format = C.AV_PIX_FMT_RGBA
d.dstFrame.width = d.srcFrame.width
@@ -122,13 +116,19 @@ func (d *h264Decoder) decode(nalu []byte) (image.Image, error) {
return nil, fmt.Errorf("av_frame_get_buffer() err")
}
d.swsCtx = C.sws_getContext(d.srcFrame.width, d.srcFrame.height, C.AV_PIX_FMT_YUV420P,
d.dstFrame.width, d.dstFrame.height, (int32)(d.dstFrame.format), C.SWS_BILINEAR, nil, nil, nil)
if d.swsCtx == nil {
return nil, fmt.Errorf("sws_getContext() err")
}
dstFrameSize := C.av_image_get_buffer_size((int32)(d.dstFrame.format), d.dstFrame.width, d.dstFrame.height, 1)
d.dstFramePtr = (*[1 << 30]uint8)(unsafe.Pointer(d.dstFrame.data[0]))[:dstFrameSize:dstFrameSize]
}
// convert frame from YUV420 to RGB
res = C.sws_scale(d.swsCtx, frameData(d.srcFrame), frameLineSize(d.srcFrame),
0, d.codecCtx.height, frameData(d.dstFrame), frameLineSize(d.dstFrame))
0, d.srcFrame.height, frameData(d.dstFrame), frameLineSize(d.dstFrame))
if res < 0 {
return nil, fmt.Errorf("sws_scale() err")
}