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Subject: cec-compliance: system audio control Author: Jiunn Chang <c0d1n61...@gmail.com> Date: Wed Sep 11 08:00:20 2019 -0500 Add comment block documenting tests not included from section 13.15 of the CEC 1.4b specification. This section outlines the System Audio Control feature. Signed-off-by: Jiunn Chang <c0d1n61...@gmail.com> Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl> utils/cec-compliance/cec-test-audio.cpp | 38 +++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) --- http://git.linuxtv.org/cgit.cgi/v4l-utils.git/commit/?id=204c2bfd30f788b7d038047ef9e007f3d8fbfd14 diff --git a/utils/cec-compliance/cec-test-audio.cpp b/utils/cec-compliance/cec-test-audio.cpp index 2bc24daf1ac3..55315439627a 100644 --- a/utils/cec-compliance/cec-test-audio.cpp +++ b/utils/cec-compliance/cec-test-audio.cpp @@ -309,6 +309,44 @@ const unsigned arc_subtests_size = ARRAY_SIZE(arc_subtests); /* System Audio Control */ +/* + * The following scenarios are defined in section 13.15 of the CEC 1.4 + * specification. + * + * These are not tested as they need three CEC devices. An amplifier + * provides the audio for a source that is being displayed on a TV. + * + * 1. Amplifier initiated <System Audio Mode Request> and active source + * discovery with a <Request Active Source> broadcast plus the + * <Active Source> response. + * 2. Post discovery, subsequent amplifier <Set System Audio Mode> [On] + * and System Audio Control feature confirmation with TV. + * 3. Amplifier broadcasts <Set System Audio Mode> [On] to mute the TV and + * unmute amplifier. + * 4. Amplifier broadcasts <Set System Audio Mode> [Off] to unmute the TV + * and mute the amplifier. + * 5. When System Audio Mode is On, muting and unmuting an amplifier sends + * a <Report Audio Status> message to the TV. + * 6. When System Audio Mode is On, the amplifier sends a <Set System Audio + * Mode> [Off] to unmute the TV before going into standby. + * 7. When System Audio Mode is On, only the amplifier can control system + * volume. + * + * These are not tested as they are hard-to-test corner cases. + * + * 1. Optional features in subsection 13.15.4 of version 1.4. + * + * These are not tested as they deal with 1.3a or older versions and is not + * worth spending time on. + * + * 1. <Request Audio Descriptor> message is from version 1.4 so older versions + * report <Feature Abort>. + * 2. <Report Audio Descriptor> message is from version 1.4 so older versions + * report <Feature Abort>. + * 3. System Audio Control is from version 1.3a so older versions report + * <Feature Abort>. + */ + static int sac_request_sad_probe(struct node *node, unsigned me, unsigned la, bool interactive) { struct cec_msg msg = {}; _______________________________________________ linuxtv-commits mailing list linuxtv-commits@linuxtv.org https://www.linuxtv.org/cgi-bin/mailman/listinfo/linuxtv-commits
