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When building for 4A, switch to new gstreamer-based ALSA output for
the RTL-SDR backend, and the Kingfisher backend now uses a gstreamer
pipeline for its loopback to either an ALSA or Pulse sink depending
on 4A or not. Using gstreamer instead of direct ALSA output has the
benefit of transparently handling resampling to the M3ULCB hardware's
required 48 KHz sample rate for the RTL-SDR backend.
Change-Id: I2bfbf924927bb461cce88b04aba0e626f8d71215
Signed-off-by: Scott Murray <scott.murray@konsulko.com>
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To avoid the GPL licensed code in rtl_fm.c making all of the binding
GPL, rework things to wrap it with a simple standalone helper
executable that is driven via stdin/stdout. While this could
potentially be done by running the original unmodified rtl_fm utility
itself, it would be impossible to implement scanning with that
approach without some compromising of playback latency and quality.
The current helper implementation is simple enough that replacing it
with an alternate one should be relatively straightforward if that is
desired.
Change-Id: If83b834da3999f5807d1453524ae72b1c3559c90
Signed-off-by: Scott Murray <scott.murray@konsulko.com>
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Switch from qmake build system to cmake avoiding the unneeded
dependency of qt
Bug-AGL: SPEC-834
Change-Id: Ifcf43b8ebadf723ec0131beda7d96f705083a1c2
Signed-off-by: Matt Ranostay <matt.ranostay@konsulko.com>
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Scott Murray
Matt Ranostay