qcom: vidc: default decoder output to linear NV12 - #600
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The Qualcomm GStreamer stack cannot convert the UBWC "NV12_Q08C" decoder output, so Videos shows a blue/green screen. The DPB (decoded picture buffer) size is derived from the PIX_FMTS capability value; keeping it UBWC while forcing the output linear left the DPB at zero and stalled the decoder. Default the decoder output to linear NV12 and split the PIX_FMTS capability into separate ENC/DEC entries so the decoder defaults to linear NV12 while the encoder keeps UBWC for camera input.
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The Qualcomm GStreamer stack cannot convert the UBWC "NV12_Q08C" decoder output, so Videos shows a blue/green screen. The DPB (decoded picture buffer) size is derived from the PIX_FMTS capability value; keeping it UBWC while forcing the output linear left the DPB at zero and stalled the decoder.
Default the decoder output to linear NV12 and split the PIX_FMTS capability into separate ENC/DEC entries so the decoder defaults to linear NV12 while the encoder keeps UBWC for camera input.