There is some Microsoft documentation that contradicts this code. https://msdn.microsoft.com/en-us/library/windows/desktop/dd316761(v=vs.85).aspx """ Dolby TrueHD (MAT) Dolby TrueHD content is transmitted over IEC 60958 at 176.4 kHz / 8 channels (requiring an IEC 60958 frame rate of 705.6 kHz) for content sample rates of 44.1, 88.2 and 176.4 kHz, and 192 kHz / 8 channels (requiring an IEC 60958 frame rate of 768 kHz) for content sample rates of 48, 96 and 192 kHz. """ 2018-05-22 12:13 GMT+08:00 Arun Raghavan <arun at arunraghavan.net>: > In high bitrate mode, we force 192kHz/8ch as the sample format, which is > the expectation for HBR formats (as that is what allows for the largest > possible packet size). > --- > src/pulsecore/core-format.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/src/pulsecore/core-format.c b/src/pulsecore/core-format.c > index 862a74b5d..096acc3a2 100644 > --- a/src/pulsecore/core-format.c > +++ b/src/pulsecore/core-format.c > @@ -248,6 +248,9 @@ int pa_format_info_to_sample_spec_fake(const pa_format_info *f, pa_sample_spec * > > if (f->encoding == PA_ENCODING_EAC3_IEC61937) > ss->rate *= 4; > + else if ((f->encoding == PA_ENCODING_TRUEHD_IEC61937) || > + (f->encoding == PA_ENCODING_DTSHD_IEC61937)) > + ss->rate = 192000; > > return 0; > } > -- > 2.17.0 > > _______________________________________________ > pulseaudio-discuss mailing list > pulseaudio-discuss at lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss -- Alexander E. Patrakov
