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msdkdec: Enable SFC scaling for AVC and HEVC

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Decoder SFC only supports down-scaling at most to 1/8.
For example, given a 4K bistream, SFC can scale it to 1080p via:
"msdkh265dec ! video/x-raw,width=1920,height=1080 ! glimagesink"

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1444>
This commit is contained in:
Mengkejiergeli Ba 2022-01-21 15:32:09 +08:00 committed by GStreamer Marge Bot
parent c5f0e075e2
commit 586dfab9bd
2 changed files with 65 additions and 7 deletions
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69
subprojects/gst-plugins-bad/sys/msdk/gstmsdkdec.c
View file

@ -484,6 +484,13 @@ gst_msdkdec_init_decoder (GstMsdkDec * thiz)
request.Type |= MFX_MEMTYPE_VIDEO_MEMORY_DECODER_TARGET;
if (thiz->use_dmabuf)
request.Type |= MFX_MEMTYPE_EXPORT_FRAME;
#if (MFX_VERSION >= 1022)
if (thiz->sfc) {
request.Info.Width = ext_dec_video_proc.Out.Width;
request.Info.Height = ext_dec_video_proc.Out.Height;
}
#endif
gst_msdk_frame_alloc (thiz->context, &request, &thiz->alloc_resp);
}
@ -574,6 +581,25 @@ done:
return ret;
}
static GstCaps *
gst_msdkdec_getcaps (GstVideoDecoder * decoder, GstCaps * filter)
{
GstCaps *caps, *tmp = NULL;
caps = gst_pad_get_pad_template_caps (decoder->sinkpad);
if (caps) {
if (filter) {
tmp = gst_caps_intersect_full (filter, caps, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (caps);
caps = tmp;
}
} else {
caps = gst_video_decoder_proxy_getcaps (decoder, NULL, filter);
}
return caps;
}
static gboolean
gst_msdkdec_set_src_caps (GstMsdkDec * thiz, gboolean need_allocation)
{
@ -581,16 +607,16 @@ gst_msdkdec_set_src_caps (GstMsdkDec * thiz, gboolean need_allocation)
GstVideoInfo *vinfo;
GstVideoAlignment align;
GstCaps *allocation_caps = NULL;
GstCaps *allowed_caps, *temp_caps;
GstCaps *allowed_caps = NULL, *temp_caps;
GstVideoFormat format;
guint width, height;
guint alloc_w, alloc_h;
int out_width, out_height;
const gchar *format_str;
GstStructure *outs;
GstStructure *outs = NULL;
const gchar *out_format;
GValue v_format = G_VALUE_INIT;
/* use display width and display height in output state, which
* will be used for caps negotiation */
width =
@ -610,7 +636,8 @@ gst_msdkdec_set_src_caps (GstMsdkDec * thiz, gboolean need_allocation)
}
#if (MFX_VERSION >= 1022)
/* SFC is triggered (for AVC and HEVC) when default output format is not
* accepted by downstream.
* accepted by downstream or when downstream requests for a smaller
* resolution (i.e. SFC supports down-scaling)
* For SFC csc, need to do the query twice: the first time uses default
* color format to query peer pad, empty caps means default format is
* not accepted by downstream; then we need the second query to decide
@ -634,9 +661,30 @@ gst_msdkdec_set_src_caps (GstMsdkDec * thiz, gboolean need_allocation)
format = gst_video_format_from_string (out_format);
thiz->sfc = TRUE;
}
gst_caps_unref (allowed_caps);
}
gst_caps_unref (temp_caps);
/* SFC scaling, need to check if downstream asking for a different resolution */
if (!allowed_caps) {
allowed_caps =
gst_pad_get_allowed_caps (GST_VIDEO_DECODER (thiz)->srcpad);
outs = gst_caps_get_structure (allowed_caps, 0);
}
gst_structure_get_int (outs, "width", &out_width);
gst_structure_get_int (outs, "height", &out_height);
gst_caps_unref (allowed_caps);
if (out_width && out_height && (out_width != width || out_height != height)) {
if (out_width > width || out_height > height)
GST_WARNING_OBJECT (thiz, "Decoder SFC cannot do up-scaling");
else {
GST_LOG_OBJECT (thiz, "Decoder SFC is doing down-scaling");
thiz->sfc = TRUE;
width = out_width;
height = out_height;
}
}
}
#endif
@ -657,9 +705,13 @@ gst_msdkdec_set_src_caps (GstMsdkDec * thiz, gboolean need_allocation)
/* Ensure output_state->caps and info have same width and height
* Also, mandate 32 bit alignment */
vinfo = &output_state->info;
gst_msdk_set_video_alignment (vinfo, alloc_w, alloc_h, &align);
if (width == out_width || height == out_height)
gst_msdk_set_video_alignment (vinfo, 0, 0, &align);
else
gst_msdk_set_video_alignment (vinfo, alloc_w, alloc_h, &align);
gst_video_info_align (vinfo, &align);
output_state->caps = gst_video_info_to_caps (vinfo);
if (srcpad_can_dmabuf (thiz))
gst_caps_set_features (output_state->caps, 0,
gst_caps_features_new (GST_CAPS_FEATURE_MEMORY_DMABUF, NULL));
@ -1092,6 +1144,7 @@ find_msdk_surface (GstMsdkDec * thiz, MsdkDecTask * task,
{
GList *l;
task->surface = NULL;
if (!out_surface)
return TRUE;
l = g_list_find_custom (thiz->locked_msdk_surfaces, out_surface,
@ -1610,7 +1663,8 @@ gst_msdkdec_decide_allocation (GstVideoDecoder * decoder, GstQuery * query)
if (_gst_caps_has_feature (pool_caps, GST_CAPS_FEATURE_MEMORY_DMABUF)) {
GST_INFO_OBJECT (decoder, "This MSDK decoder uses DMABuf memory");
thiz->use_video_memory = thiz->use_dmabuf = TRUE;
}
} else if (thiz->sfc)
thiz->use_video_memory = TRUE;
/* Initialize MSDK decoder before new bufferpool tries to alloc each buffer,
* which requires information about frame allocation.
@ -2003,6 +2057,7 @@ gst_msdkdec_class_init (GstMsdkDecClass * klass)
decoder_class->parse = GST_DEBUG_FUNCPTR (gst_msdkdec_parse);
decoder_class->decide_allocation =
GST_DEBUG_FUNCPTR (gst_msdkdec_decide_allocation);
decoder_class->getcaps = GST_DEBUG_FUNCPTR (gst_msdkdec_getcaps);
decoder_class->flush = GST_DEBUG_FUNCPTR (gst_msdkdec_flush);
decoder_class->drain = GST_DEBUG_FUNCPTR (gst_msdkdec_drain);
decoder_class->transform_meta =

3
subprojects/gst-plugins-bad/sys/msdk/gstmsdkdec.h
View file

@ -135,6 +135,9 @@ GType gst_msdkdec_get_type (void);
void
gst_msdkdec_add_bs_extra_param (GstMsdkDec * thiz, mfxExtBuffer * param);
void
gst_msdkdec_add_video_extra_param (GstMsdkDec * thiz, mfxExtBuffer * param);
G_END_DECLS
#endif /* __GST_MSDKDEC_H__ */