af_hdcd: Add analyze mode

Multimedia / FFmpeg - Burt P [gmail.com] - 8 August 2016 10:49 UTC

A new mode, selected by filter option, to aid in analysis of HDCD encoded audio. In this mode the audio is replaced by a solid tone and the amplitude is adjusted to signal some specified aspect of the process. The output file can be loaded in an audio editor alongside the original, where the user can see where different features or states are present.

b2b659b af_hdcd: Add analyze mode
doc/filters.texi | 32 ++++++++++
libavfilter/af_hdcd.c | 163 ++++++++++++++++++++++++++++++++++++++++++++++---
2 files changed, 187 insertions(+), 8 deletions(-)

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