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vtenc: Set colorimetry information

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It looks like VideoToolbox doesn't support all our colorimetries.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1214>
This commit is contained in:
Nirbheek Chauhan 2021-10-19 23:53:39 +05:30 committed by GStreamer Marge Bot
parent 0f0e68080c
commit 4e37f99975
1 changed files with 111 additions and 0 deletions
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111
subprojects/gst-plugins-bad/sys/applemedia/vtenc.c
View file

@ -904,6 +904,115 @@ gst_vtenc_flush (GstVideoEncoder * enc)
return (ret == GST_FLOW_OK);
}
static void
gst_vtenc_set_colorimetry (GstVTEnc * self, VTCompressionSessionRef session)
{
OSStatus status;
CFStringRef primaries = NULL, transfer = NULL, matrix = NULL;
GstVideoColorimetry cm = GST_VIDEO_INFO_COLORIMETRY (&self->video_info);
/*
* https://developer.apple.com/documentation/corevideo/cvimagebuffer/image_buffer_ycbcr_matrix_constants
*/
switch (cm.matrix) {
case GST_VIDEO_COLOR_MATRIX_BT709:
matrix = kCVImageBufferYCbCrMatrix_ITU_R_709_2;
break;
case GST_VIDEO_COLOR_MATRIX_BT601:
matrix = kCVImageBufferYCbCrMatrix_ITU_R_601_4;
break;
case GST_VIDEO_COLOR_MATRIX_SMPTE240M:
matrix = kCVImageBufferYCbCrMatrix_SMPTE_240M_1995;
break;
case GST_VIDEO_COLOR_MATRIX_BT2020:
matrix = kCVImageBufferYCbCrMatrix_ITU_R_2020;
break;
default:
GST_WARNING_OBJECT (self, "Unsupported color matrix %u", cm.matrix);
}
/*
* https://developer.apple.com/documentation/corevideo/cvimagebuffer/image_buffer_transfer_function_constants
*/
switch (cm.transfer) {
case GST_VIDEO_TRANSFER_BT709:
case GST_VIDEO_TRANSFER_BT601:
case GST_VIDEO_TRANSFER_UNKNOWN:
transfer = kCVImageBufferTransferFunction_ITU_R_709_2;
break;
case GST_VIDEO_TRANSFER_SMPTE240M:
transfer = kCVImageBufferTransferFunction_SMPTE_240M_1995;
break;
case GST_VIDEO_TRANSFER_BT2020_12:
transfer = kCVImageBufferTransferFunction_ITU_R_2020;
break;
case GST_VIDEO_TRANSFER_SRGB:
if (__builtin_available (macOS 10.13, *))
transfer = kCVImageBufferTransferFunction_sRGB;
else
GST_WARNING_OBJECT (self, "macOS version is too old, the sRGB transfer "
"function is not available");
break;
case GST_VIDEO_TRANSFER_SMPTE2084:
if (__builtin_available (macOS 10.13, *))
transfer = kCVImageBufferTransferFunction_SMPTE_ST_2084_PQ;
else
GST_WARNING_OBJECT (self, "macOS version is too old, the SMPTE2084 "
"transfer function is not available");
break;
default:
GST_WARNING_OBJECT (self, "Unsupported color transfer %u", cm.transfer);
}
/*
* https://developer.apple.com/documentation/corevideo/cvimagebuffer/image_buffer_color_primaries_constants
*/
switch (cm.primaries) {
case GST_VIDEO_COLOR_PRIMARIES_BT709:
primaries = kCVImageBufferColorPrimaries_ITU_R_709_2;
break;
case GST_VIDEO_COLOR_PRIMARIES_SMPTE170M:
case GST_VIDEO_COLOR_PRIMARIES_SMPTE240M:
primaries = kCVImageBufferColorPrimaries_SMPTE_C;
break;
case GST_VIDEO_COLOR_PRIMARIES_BT2020:
primaries = kCVImageBufferColorPrimaries_ITU_R_2020;
break;
case GST_VIDEO_COLOR_PRIMARIES_SMPTERP431:
primaries = kCVImageBufferColorPrimaries_DCI_P3;
break;
case GST_VIDEO_COLOR_PRIMARIES_SMPTEEG432:
primaries = kCVImageBufferColorPrimaries_P3_D65;
break;
case GST_VIDEO_COLOR_PRIMARIES_EBU3213:
primaries = kCVImageBufferColorPrimaries_EBU_3213;
break;
default:
GST_WARNING_OBJECT (self, "Unsupported color primaries %u", cm.primaries);
}
if (primaries) {
status = VTSessionSetProperty (session,
kVTCompressionPropertyKey_ColorPrimaries, primaries);
GST_DEBUG_OBJECT (self, "kVTCompressionPropertyKey_ColorPrimaries =>"
"%d", status);
}
if (transfer) {
status = VTSessionSetProperty (session,
kVTCompressionPropertyKey_TransferFunction, transfer);
GST_DEBUG_OBJECT (self, "kVTCompressionPropertyKey_TransferFunction =>"
"%d", status);
}
if (matrix) {
status = VTSessionSetProperty (session,
kVTCompressionPropertyKey_YCbCrMatrix, matrix);
GST_DEBUG_OBJECT (self, "kVTCompressionPropertyKey_YCbCrMatrix => %d",
status);
}
}
static VTCompressionSessionRef
gst_vtenc_create_session (GstVTEnc * self)
{
@ -977,6 +1086,8 @@ gst_vtenc_create_session (GstVTEnc * self)
gst_vtenc_get_bitrate (self));
}
gst_vtenc_set_colorimetry (self, session);
gst_vtenc_session_configure_realtime (self, session,
gst_vtenc_get_realtime (self));
gst_vtenc_session_configure_allow_frame_reordering (self, session,