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msdkh264enc: Implement frame-packing SEI insertion for side-by-side and top-bottom

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Ideally this would be supported directly in the Intel MediaSDK but
that's not the case nowadays.

https://bugzilla.gnome.org/show_bug.cgi?id=774920
This commit is contained in:
Sebastian Dröge 2017-10-31 10:09:44 +02:00
parent 3c611da315
commit 538aae2404
3 changed files with 157 additions and 1 deletions
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2
sys/msdk/Makefile.am
View file

@ -33,6 +33,7 @@ noinst_HEADERS = \
libgstmsdk_la_CFLAGS = \
$(GST_CFLAGS) \
$(GST_BASE_CFLAGS) \
$(GST_PBUTILS_CFLAGS) \
$(GST_VIDEO_CFLAGS) \
$(MSDK_CFLAGS) \
@ -40,6 +41,7 @@ libgstmsdk_la_CFLAGS = \
libgstmsdk_la_LIBADD = \
$(GST_LIBS) \
$(GST_BASE_LIBS) \
$(GST_PBUTILS_LIBS) \
$(GST_VIDEO_LIBS) \
$(MSDK_LIBS) \

155
sys/msdk/gstmsdkh264enc.c
View file

@ -35,6 +35,7 @@
#include "gstmsdkh264enc.h"
#include <gst/base/base.h>
#include <gst/pbutils/pbutils.h>
GST_DEBUG_CATEGORY_EXTERN (gst_msdkh264enc_debug);
@ -44,11 +45,14 @@ enum
{
PROP_0,
PROP_CABAC,
PROP_LOW_POWER
PROP_LOW_POWER,
PROP_FRAME_PACKING,
};
#define PROP_CABAC_DEFAULT TRUE
#define PROP_LOWPOWER_DEFAULT FALSE
#define PROP_FRAME_PACKING_DEFAULT -1
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
@ -60,9 +64,141 @@ static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
"profile = (string) { high, main, baseline, constrained-baseline }")
);
static GType
gst_msdkh264enc_frame_packing_get_type (void)
{
static GType format_type = 0;
static const GEnumValue format_types[] = {
{GST_VIDEO_MULTIVIEW_FRAME_PACKING_NONE, "None (default)", "none"},
{GST_VIDEO_MULTIVIEW_FRAME_PACKING_SIDE_BY_SIDE, "Side by Side",
"side-by-side"},
{GST_VIDEO_MULTIVIEW_FRAME_PACKING_TOP_BOTTOM, "Top Bottom", "top-bottom"},
{0, NULL, NULL}
};
if (!format_type) {
format_type =
g_enum_register_static ("GstMsdkH264EncFramePacking", format_types);
}
return format_type;
}
#define gst_msdkh264enc_parent_class parent_class
G_DEFINE_TYPE (GstMsdkH264Enc, gst_msdkh264enc, GST_TYPE_MSDKENC);
static void
insert_frame_packing_sei (GstMsdkH264Enc * thiz, GstVideoCodecFrame * frame,
GstVideoMultiviewMode mode)
{
GstMapInfo map;
GstByteReader reader;
guint offset;
if (mode != GST_VIDEO_MULTIVIEW_MODE_SIDE_BY_SIDE
&& mode != GST_VIDEO_MULTIVIEW_MODE_TOP_BOTTOM) {
GST_ERROR_OBJECT (thiz, "Unsupported multiview mode %d", mode);
return;
}
GST_DEBUG ("Inserting SEI Frame Packing for multiview mode %d", mode);
gst_buffer_map (frame->output_buffer, &map, GST_MAP_READ);
gst_byte_reader_init (&reader, map.data, map.size);
while ((offset =
gst_byte_reader_masked_scan_uint32 (&reader, 0xffffff00, 0x00000100,
0, gst_byte_reader_get_remaining (&reader))) != -1) {
guint8 type;
guint offset2;
gst_byte_reader_skip_unchecked (&reader, offset + 3);
if (!gst_byte_reader_get_uint8 (&reader, &type))
goto done;
type = type & 0x1f;
offset2 =
gst_byte_reader_masked_scan_uint32 (&reader, 0xffffff00, 0x00000100, 0,
gst_byte_reader_get_remaining (&reader));
if (offset2 == -1)
offset2 = gst_byte_reader_get_remaining (&reader);
/* Slice, should really be an IDR slice (5) */
if (type >= 1 && type <= 5) {
GstBuffer *new_buffer;
GstMemory *mem;
static const guint8 sei_top_bottom[] =
{ 0x00, 0x00, 0x01, 0x06, 0x2d, 0x07, 0x82, 0x01,
0x00, 0x00, 0x03, 0x00, 0x01, 0x20, 0x80
};
static const guint8 sei_side_by_side[] =
{ 0x00, 0x00, 0x01, 0x06, 0x2d, 0x07, 0x81, 0x81,
0x00, 0x00, 0x03, 0x00, 0x01, 0x20, 0x80
};
const guint8 *sei;
guint sei_size;
if (mode == GST_VIDEO_MULTIVIEW_MODE_SIDE_BY_SIDE) {
sei = sei_side_by_side;
sei_size = sizeof (sei_side_by_side);
} else {
sei = sei_top_bottom;
sei_size = sizeof (sei_top_bottom);
}
/* Create frame packing SEI
* FIXME: This assumes it does not exist in the stream, which is not
* going to be true anymore once this is fixed:
* https://github.com/Intel-Media-SDK/MediaSDK/issues/13
*/
new_buffer = gst_buffer_new ();
/* Copy all metadata */
gst_buffer_copy_into (new_buffer, frame->output_buffer,
GST_BUFFER_COPY_METADATA, 0, -1);
/* Copy previous NALs */
gst_buffer_copy_into (new_buffer, frame->output_buffer,
GST_BUFFER_COPY_MEMORY, 0, gst_byte_reader_get_pos (&reader) - 4);
mem =
gst_memory_new_wrapped (0, g_memdup (sei, sei_size), sei_size, 0,
sei_size, NULL, g_free);
gst_buffer_append_memory (new_buffer, mem);
gst_buffer_copy_into (new_buffer, frame->output_buffer,
GST_BUFFER_COPY_MEMORY, gst_byte_reader_get_pos (&reader) - 4, -1);
gst_buffer_unmap (frame->output_buffer, &map);
gst_buffer_unref (frame->output_buffer);
frame->output_buffer = new_buffer;
return;
}
}
done:
gst_buffer_unmap (frame->output_buffer, &map);
}
static GstFlowReturn
gst_msdkh264enc_pre_push (GstVideoEncoder * encoder, GstVideoCodecFrame * frame)
{
GstMsdkH264Enc *thiz = GST_MSDKH264ENC (encoder);
if (GST_VIDEO_CODEC_FRAME_IS_SYNC_POINT (frame) &&
(thiz->frame_packing != GST_VIDEO_MULTIVIEW_MODE_NONE ||
((GST_VIDEO_INFO_MULTIVIEW_MODE (&thiz->base.input_state->info) !=
GST_VIDEO_MULTIVIEW_MODE_NONE)
&& GST_VIDEO_INFO_MULTIVIEW_MODE (&thiz->base.
input_state->info) != GST_VIDEO_MULTIVIEW_MODE_MONO))) {
insert_frame_packing_sei (thiz, frame,
thiz->frame_packing !=
GST_VIDEO_MULTIVIEW_MODE_NONE ? thiz->frame_packing :
GST_VIDEO_INFO_MULTIVIEW_MODE (&thiz->base.input_state->info));
}
return GST_FLOW_OK;
}
static gboolean
gst_msdkh264enc_set_format (GstMsdkEnc * encoder)
{
@ -262,6 +398,9 @@ gst_msdkh264enc_set_property (GObject * object, guint prop_id,
case PROP_LOW_POWER:
thiz->lowpower = g_value_get_boolean (value);
break;
case PROP_FRAME_PACKING:
thiz->frame_packing = g_value_get_enum (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -291,6 +430,9 @@ gst_msdkh264enc_get_property (GObject * object, guint prop_id, GValue * value,
case PROP_LOW_POWER:
g_value_set_boolean (value, thiz->lowpower);
break;
case PROP_FRAME_PACKING:
g_value_set_enum (value, thiz->frame_packing);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -303,15 +445,19 @@ gst_msdkh264enc_class_init (GstMsdkH264EncClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *element_class;
GstVideoEncoderClass *videoencoder_class;
GstMsdkEncClass *encoder_class;
gobject_class = G_OBJECT_CLASS (klass);
element_class = GST_ELEMENT_CLASS (klass);
videoencoder_class = GST_VIDEO_ENCODER_CLASS (klass);
encoder_class = GST_MSDKENC_CLASS (klass);
gobject_class->set_property = gst_msdkh264enc_set_property;
gobject_class->get_property = gst_msdkh264enc_get_property;
videoencoder_class->pre_push = gst_msdkh264enc_pre_push;
encoder_class->set_format = gst_msdkh264enc_set_format;
encoder_class->configure = gst_msdkh264enc_configure;
encoder_class->set_src_caps = gst_msdkh264enc_set_src_caps;
@ -324,6 +470,12 @@ gst_msdkh264enc_class_init (GstMsdkH264EncClass * klass)
g_param_spec_boolean ("low-power", "Low power", "Enable low power mode",
PROP_LOWPOWER_DEFAULT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_FRAME_PACKING,
g_param_spec_enum ("frame-packing", "Frame Packing",
"Set frame packing mode for Stereoscopic content",
gst_msdkh264enc_frame_packing_get_type (), PROP_FRAME_PACKING_DEFAULT,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_element_class_set_static_metadata (element_class,
"Intel MSDK H264 encoder",
"Codec/Encoder/Video",
@ -338,4 +490,5 @@ gst_msdkh264enc_init (GstMsdkH264Enc * thiz)
{
thiz->cabac = PROP_CABAC_DEFAULT;
thiz->lowpower = PROP_LOWPOWER_DEFAULT;
thiz->frame_packing = PROP_FRAME_PACKING_DEFAULT;
}

1
sys/msdk/gstmsdkh264enc.h
View file

@ -61,6 +61,7 @@ struct _GstMsdkH264Enc
gboolean cabac;
gboolean lowpower;
gint frame_packing;
};
struct _GstMsdkH264EncClass