avformat/mpegts: parse large PMTs with multiple tables
In 9152c1e4, the mpegts parser was taught how to parse PMT sections which contained multiple tables. That commit fixed parsing of PMT packets from some cable providers, which included a special SCTE table (0xc0) before the standard program map table (0x2). Sometimes, however, the combined 0xc0 and 0x2 tables are larger than a single TS packet (188 bytes). The mpegts parser already attempts to parse sections which span multiple packets, but still assumed that the split section only contained one table. This patch fixes parsing of such a sample[1]. Before: Input #0, mpegts, from 'combined-pmt-tids-split.ts': Duration: 00:00:01.26, start: 39188.931756, bitrate: 597 kb/s Program 1 No Program Stream #0:0[0xeff]: Audio: ac3, 48000 Hz, mono, fltp, 64 kb/s Stream #0:1[0xefd]: Audio: mp3, 0 channels, fltp Stream #0:2[0xefe]: Unknown: none After: Input #0, mpegts, from 'combined-pmt-tids-split.ts': Duration: 00:00:01.27, start: 39188.931756, bitrate: 589 kb/s Program 1 Stream #0:0[0xefd]: Video: h264 ([27][0][0][0] / 0x001B), none, 59.94 fps, 59.94 tbr, 90k tbn, 180k tbc Stream #0:1[0xefe](eng): Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, stereo, fltp, 384 kb/s Stream #0:2[0xeff](spa): Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, mono, fltp, 64 kb/s Stream #0:3[0xf00]: Data: scte_35 Stream #0:4[0xf01]: Unknown: none (ETV1 / 0x31565445) Stream #0:5[0xf02]: Unknown: none (ETV1 / 0x31565445) Stream #0:6[0xf03]: Unknown: none ([192][0][0][0] / 0x00C0) With the patch, the PMT is parsed correctly so the streams are created in the correct order, are associated with "Program 1", and their codecs are set correctly. [1] https://s3.amazonaws.com/tmm1/combined-pmt-tids-split.tsSigned-off-by:Aman Gupta <aman@tmm1.net> Signed-off-by:
Michael Niedermayer <michael@niedermayer.cc>
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