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vtenc: Fix checking for certain CPU variants when running in VMs

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These checks were introduced to prevent exposing ARGB64/RGBA64 in the caps
when running on M1 Pro/Max with macOS <13 because of a bug in VideoToolbox.
Unfortunately, the initial buffer size of 15 is too short when running
in a VM - the CPU brand string there looks like "Apple M1 Pro (Virtual)",
which due to its length causes sysctlbyname to return -1, resulting in
broken formats still showing up in the caps.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4082>
This commit is contained in:
Piotr Brzeziński 2023-02-28 15:26:45 +01:00 committed by Tim-Philipp Müller
parent f1bc3e6d88
commit 9a2462391b
1 changed files with 7 additions and 3 deletions
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10
subprojects/gst-plugins-bad/sys/applemedia/vtenc.c
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@ -234,8 +234,8 @@ gst_vtenc_base_init (GstVTEncClass * klass)
#ifndef HAVE_IOS
gboolean enable_argb = TRUE;
int retval;
char cpu_name[15];
size_t cpu_len = 15;
char cpu_name[30];
size_t cpu_len = 30;
if (__builtin_available (macOS 13.0, *)) {
/* Can't negate a __builtin_available check */
@ -247,9 +247,13 @@ gst_vtenc_base_init (GstVTEncClass * klass)
if (retval == 0 &&
(strstr (cpu_name, "M1 Pro") != NULL ||
strstr (cpu_name, "M1 Max") != NULL))
strstr (cpu_name, "M1 Max") != NULL)) {
GST_WARNING
("Disabling ARGB64/RGBA64 caps due to a bug in VideoToolbox "
"on M1 Pro/Max running macOS < 13.0.");
enable_argb = FALSE;
}
}
if (enable_argb) {
caps = gst_vtutil_caps_append_video_format (caps, "ARGB64_BE");