psi: ReadPMT skips over packets without a program map table #85
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Following up on #75
Some streams (ironically those I see coming from my comcast cable feed) can contain multiple tables on the PMT pid. These include cable-specific SCTE tables (0xc0), in addition to the usual PMT table (0x2).
Normally both tables are combined into one TS packet, but sometimes a single TS packet only contains the SCTE table. Then the following TS packet contains the PMT table.
This patch fixes
ReadPMTto ignore packets that do not contain the PMT table, and to reset its state and keep reading until it actually finds a real PMT.