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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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video-anc: add AFD/Bar support
This commit is contained in:
Aaron Boxer
Sebastian Dröge
parent
6a78d20272
commit
f6fa444f04
2 changed files with 407 additions and 0 deletions
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@ -1129,3 +1129,175 @@ gst_video_caption_type_to_caps (GstVideoCaptionType type)
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return caption_caps;
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}
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/* Active Format Description (AFD) Meta implementation */
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GType
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gst_video_afd_meta_api_get_type (void)
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{
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static volatile GType type;
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if (g_once_init_enter (&type)) {
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static const gchar *tags[] = {
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GST_META_TAG_VIDEO_SIZE_STR,
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GST_META_TAG_VIDEO_ORIENTATION_STR,
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GST_META_TAG_VIDEO_STR
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};
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GType _type = gst_meta_api_type_register ("GstVideoAFDMetaAPI", tags);
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g_once_init_leave (&type, _type);
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}
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return type;
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}
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static gboolean
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gst_video_afd_meta_init (GstMeta * meta, gpointer params, GstBuffer * buffer)
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{
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GstVideoAFDMeta *emeta = (GstVideoAFDMeta *) meta;
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emeta->field = 0;
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emeta->spec = GST_VIDEO_AFD_SPEC_ATSC_A53;
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emeta->afd = GST_VIDEO_AFD_UNAVAILABLE;
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return TRUE;
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}
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const GstMetaInfo *
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gst_video_afd_meta_get_info (void)
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{
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static const GstMetaInfo *meta_info = NULL;
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if (g_once_init_enter ((GstMetaInfo **) & meta_info)) {
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const GstMetaInfo *mi = gst_meta_register (GST_VIDEO_AFD_META_API_TYPE,
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"GstVideoAFDMeta",
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sizeof (GstVideoAFDMeta),
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gst_video_afd_meta_init,
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NULL,
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NULL);
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g_once_init_leave ((GstMetaInfo **) & meta_info, (GstMetaInfo *) mi);
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}
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return meta_info;
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}
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/**
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* gst_buffer_add_video_afd_meta:
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* @buffer: a #GstBuffer
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* @field: 0 for progressive or field 1 and 1 for field 2
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* @spec: #GstVideoAFDSpec that applies to AFD value
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* @afd: #GstVideoAFDValue AFD enumeration
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*
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* Attaches #GstVideoAFDMeta metadata to @buffer with the given
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* parameters.
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*
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* Returns: (transfer none): the #GstVideoAFDMeta on @buffer.
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*
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* Since: 1.18
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*/
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GstVideoAFDMeta *
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gst_buffer_add_video_afd_meta (GstBuffer * buffer, guint8 field,
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GstVideoAFDSpec spec, GstVideoAFDValue afd)
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{
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GstVideoAFDMeta *meta;
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gint8 afd_data = (gint8) afd;
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g_return_val_if_fail (GST_IS_BUFFER (buffer), NULL);
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g_return_val_if_fail (field <= 1, NULL);
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g_return_val_if_fail ((guint8) spec <= 2, NULL);
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/* AFD is stored in a nybble */
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g_return_val_if_fail (afd_data <= 0xF, NULL);
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/* reserved values for all specifications */
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g_return_val_if_fail (afd_data != 1 && (afd_data < 5 || afd_data > 7)
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&& afd_data != 12, NULL);
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/* reserved for DVB/ETSI */
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g_return_val_if_fail ((spec != GST_VIDEO_AFD_SPEC_DVB_ETSI)
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|| (afd_data != 0), NULL);
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meta = (GstVideoAFDMeta *) gst_buffer_add_meta (buffer,
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GST_VIDEO_AFD_META_INFO, NULL);
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g_assert (meta != NULL);
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meta->field = field;
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meta->spec = spec;
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meta->afd = afd;
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return meta;
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}
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/* Bar Meta implementation */
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GType
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gst_video_bar_meta_api_get_type (void)
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{
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static volatile GType type;
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if (g_once_init_enter (&type)) {
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static const gchar *tags[] = {
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GST_META_TAG_VIDEO_SIZE_STR,
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GST_META_TAG_VIDEO_ORIENTATION_STR,
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GST_META_TAG_VIDEO_STR
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};
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GType _type = gst_meta_api_type_register ("GstVideoBarMetaAPI", tags);
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g_once_init_leave (&type, _type);
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}
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return type;
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}
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const GstMetaInfo *
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gst_video_bar_meta_get_info (void)
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{
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static const GstMetaInfo *meta_info = NULL;
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if (g_once_init_enter ((GstMetaInfo **) & meta_info)) {
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const GstMetaInfo *mi = gst_meta_register (GST_VIDEO_BAR_META_API_TYPE,
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"GstVideoBarMeta",
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sizeof (GstVideoBarMeta),
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NULL,
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NULL,
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NULL);
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g_once_init_leave ((GstMetaInfo **) & meta_info, (GstMetaInfo *) mi);
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}
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return meta_info;
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}
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/**
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* gst_buffer_add_video_bar_meta:
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* @buffer: a #GstBuffer
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* @field: 0 for progressive or field 1 and 1 for field 2
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* @is_letterbox: if true then bar data specifies letterbox, otherwise pillarbox
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* @bar_data1: If @is_letterbox is true, then the value specifies the
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* last line of a horizontal letterbox bar area at top of reconstructed frame.
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* Otherwise, it specifies the last horizontal luminance sample of a vertical pillarbox
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* bar area at the left side of the reconstructed frame
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* @bar_data2: If @is_letterbox is true, then the value specifies the
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* first line of a horizontal letterbox bar area at bottom of reconstructed frame.
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* Otherwise, it specifies the first horizontal
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* luminance sample of a vertical pillarbox bar area at the right side of the reconstructed frame.
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*
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* Attaches #GstVideoBarMeta metadata to @buffer with the given
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* parameters.
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*
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* Returns: (transfer none): the #GstVideoBarMeta on @buffer.
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*
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* See Table 6.11 Bar Data Syntax
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*
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* https://www.atsc.org/wp-content/uploads/2015/03/a_53-Part-4-2009.pdf
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*
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* Since: 1.18
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*/
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GstVideoBarMeta *
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gst_buffer_add_video_bar_meta (GstBuffer * buffer, guint8 field,
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gboolean is_letterbox, guint bar_data1, guint bar_data2)
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{
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GstVideoBarMeta *meta;
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g_return_val_if_fail (GST_IS_BUFFER (buffer), NULL);
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g_return_val_if_fail (field <= 1, NULL);
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meta = (GstVideoBarMeta *) gst_buffer_add_meta (buffer,
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GST_VIDEO_BAR_META_INFO, NULL);
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g_assert (meta != NULL);
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meta->field = field;
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meta->is_letterbox = is_letterbox;
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meta->bar_data1 = bar_data1;
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meta->bar_data2 = bar_data2;
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return meta;
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}
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@ -103,6 +103,241 @@ typedef enum {
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GST_VIDEO_ANCILLARY_DID16_S2016_3_AFD_BAR = 0x4105,
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} GstVideoAncillaryDID16;
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/**
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* GstVideoAFDValue:
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* @GST_VIDEO_AFD_UNAVAILABLE: Unavailable (see note 0 below).
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* @GST_VIDEO_AFD_16_9_TOP_ALIGNED: For 4:3 coded frame, letterbox 16:9 image,
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* at top of the coded frame. For 16:9 coded frame, full frame 16:9 image,
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* the same as the coded frame.
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* @GST_VIDEO_AFD_14_9_TOP_ALIGNED: For 4:3 coded frame, letterbox 14:9 image,
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* at top of the coded frame. For 16:9 coded frame, pillarbox 14:9 image,
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* horizontally centered in the coded frame.
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* @GST_VIDEO_AFD_GREATER_THAN_16_9: For 4:3 coded frame, letterbox image with an aspect ratio
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* greater than 16:9, vertically centered in the coded frame. For 16:9 coded frame,
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* letterbox image with an aspect ratio greater than 16:9.
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* @GST_VIDEO_AFD_4_3_FULL_16_9_FULL: For 4:3 coded frame, full frame 4:3 image,
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* the same as the coded frame. For 16:9 coded frame, full frame 16:9 image, the same as
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* the coded frame.
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* @GST_VIDEO_AFD_4_3_FULL_4_3_PILLAR: For 4:3 coded frame, full frame 4:3 image, the same as
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* the coded frame. For 16:9 coded frame, pillarbox 4:3 image, horizontally centered in the
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* coded frame.
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* @GST_VIDEO_AFD_16_9_LETTER_16_9_FULL: For 4:3 coded frame, letterbox 16:9 image, vertically centered in
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* the coded frame with all image areas protected. For 16:9 coded frame, full frame 16:9 image,
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* with all image areas protected.
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* @GST_VIDEO_AFD_14_9_LETTER_14_9_PILLAR: For 4:3 coded frame, letterbox 14:9 image, vertically centered in
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* the coded frame. For 16:9 coded frame, pillarbox 14:9 image, horizontally centered in the
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* coded frame.
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* @GST_VIDEO_AFD_4_3_FULL_14_9_CENTER: For 4:3 coded frame, full frame 4:3 image, with alternative 14:9
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* center. For 16:9 coded frame, pillarbox 4:3 image, with alternative 14:9 center.
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* @GST_VIDEO_AFD_16_9_LETTER_14_9_CENTER: For 4:3 coded frame, letterbox 16:9 image, with alternative 14:9
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* center. For 16:9 coded frame, full frame 16:9 image, with alternative 14:9 center.
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* @GST_VIDEO_AFD_16_9_LETTER_4_3_CENTER: For 4:3 coded frame, letterbox 16:9 image, with alternative 4:3
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* center. For 16:9 coded frame, full frame 16:9 image, with alternative 4:3 center.
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*
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* Enumeration of the various values for Active Format Description (AFD)
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*
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* AFD should be included in video user data whenever the rectangular
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* picture area containing useful information does not extend to the full height or width of the coded
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* frame. AFD data may also be included in user data when the rectangular picture area containing
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* useful information extends to the full height and width of the coded frame.
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*
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* For details, see Table 6.14 Active Format in:
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*
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* ATSC Digital Television Standard:
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* Part 4 – MPEG-2 Video System Characteristics
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*
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* https://www.atsc.org/wp-content/uploads/2015/03/a_53-Part-4-2009.pdf
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*
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* and Active Format Description in Complete list of AFD codes
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*
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* https://en.wikipedia.org/wiki/Active_Format_Description#Complete_list_of_AFD_codes
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*
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* and SMPTE ST2016-1
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*
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* Notes:
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*
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* 1) AFD 0 is undefined for ATSC and SMPTE ST2016-1, indicating that AFD data is not available:
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* If Bar Data is not present, AFD '0000' indicates that exact information
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* is not available and the active image should be assumed to be the same as the coded frame. AFD '0000'.
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* AFD '0000' accompanied by Bar Data signals that the active image’s aspect ratio is narrower than 16:9,
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* but is not 4:3 or 14:9. As the exact aspect ratio cannot be conveyed by AFD alone, wherever possible,
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* AFD ‘0000’ should be accompanied by Bar Data to define the exact vertical or horizontal extent
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* of the active image.
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* 2) AFD 0 is reserved for DVB/ETSI
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* 3) values 1, 5, 6, 7, and 12 are reserved for both ATSC and DVB/ETSI
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* 4) values 2 and 3 are not recommended for ATSC, but are valid for DVB/ETSI
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*
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* Since: 1.18
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*/
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typedef enum {
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GST_VIDEO_AFD_UNAVAILABLE = 0,
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GST_VIDEO_AFD_16_9_TOP_ALIGNED = 2,
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GST_VIDEO_AFD_14_9_TOP_ALIGNED = 3,
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GST_VIDEO_AFD_GREATER_THAN_16_9 = 4,
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GST_VIDEO_AFD_4_3_FULL_16_9_FULL = 8,
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GST_VIDEO_AFD_4_3_FULL_4_3_PILLAR = 9,
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GST_VIDEO_AFD_16_9_LETTER_16_9_FULL = 10,
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GST_VIDEO_AFD_14_9_LETTER_14_9_PILLAR = 11,
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GST_VIDEO_AFD_4_3_FULL_14_9_CENTER = 13,
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GST_VIDEO_AFD_16_9_LETTER_14_9_CENTER = 14,
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GST_VIDEO_AFD_16_9_LETTER_4_3_CENTER = 15
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} GstVideoAFDValue;
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/**
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* GstVideoAFDSpec:
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* @GST_VIDEO_AFD_SPEC_DVB_ETSI: AFD value is from DVB/ETSI standard
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* @GST_VIDEO_AFD_SPEC_ATSC_A53: AFD value is from ATSC A/53 standard
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* @GST_VIDEO_AFD_SPEC_SMPT_ST2016_1 : AFD value is from SMPTE ST2016-1 standard
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*
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* Enumeration of the different standards that may apply to AFD data:
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*
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* 0) ETSI/DVB:
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* https://www.etsi.org/deliver/etsi_ts/101100_101199/101154/02.01.01_60/ts_101154v020101p.pdf
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*
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* 1) ATSC A/53:
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* https://www.atsc.org/wp-content/uploads/2015/03/a_53-Part-4-2009.pdf
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*
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* 2) SMPTE ST2016-1:
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*
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* Since 1.18
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*/
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typedef enum {
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GST_VIDEO_AFD_SPEC_DVB_ETSI,
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GST_VIDEO_AFD_SPEC_ATSC_A53,
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GST_VIDEO_AFD_SPEC_SMPTE_ST2016_1
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} GstVideoAFDSpec;
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/**
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* GstVideoAFDMeta:
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* @meta: parent #GstMeta
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* @field: 0 for progressive or field 1 and 1 for field 2
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* @spec: #GstVideoAFDSpec that applies to @afd
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* @afd: #GstVideoAFDValue AFD value
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*
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* Active Format Description (AFD)
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*
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* For details, see Table 6.14 Active Format in:
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*
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* ATSC Digital Television Standard:
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* Part 4 – MPEG-2 Video System Characteristics
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*
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* https://www.atsc.org/wp-content/uploads/2015/03/a_53-Part-4-2009.pdf
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*
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* and Active Format Description in Complete list of AFD codes
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*
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* https://en.wikipedia.org/wiki/Active_Format_Description#Complete_list_of_AFD_codes
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*
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* and SMPTE ST2016-1
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*
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* Since: 1.18
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*/
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typedef struct {
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GstMeta meta;
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guint8 field;
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GstVideoAFDSpec spec;
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GstVideoAFDValue afd;
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} GstVideoAFDMeta;
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GST_VIDEO_API GType gst_video_afd_meta_api_get_type (void);
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#define GST_VIDEO_AFD_META_API_TYPE (gst_video_afd_meta_api_get_type())
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GST_VIDEO_API const GstMetaInfo *gst_video_afd_meta_get_info (void);
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#define GST_VIDEO_AFD_META_INFO (gst_video_afd_meta_get_info())
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/**
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* gst_buffer_get_video_afd_meta:
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* @b: A #GstBuffer
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* @field: 0 for progressive or field 1 and 1 for field 2
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* @spec: #GstVideoAFDSpec that applies to @afd
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* @afd: #GstVideoAFDValue AFD value
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*
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* Gets the #GstVideoAFDMeta that might be present on @b.
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* Note: there may be two #GstVideoAFDMeta structs for interlaced video.
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*
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* Since: 1.18
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*
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* Returns: The first #GstVideoAFDMeta present on @b, or %NULL if
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* no #GstVideoAFDMeta are present
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*/
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#define gst_buffer_get_video_afd_meta(b) \
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((GstVideoAFDMeta*)gst_buffer_get_meta((b)))
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GST_VIDEO_API
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GstVideoAFDMeta *gst_buffer_add_video_afd_meta (GstBuffer * buffer, guint8 field,
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GstVideoAFDSpec spec,
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GstVideoAFDValue afd);
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/**
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* GstVideoBarMeta:
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* @meta: parent #GstMeta
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* @field: 0 for progressive or field 1 and 1 for field 2
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* @is_letterbox: if true then bar data specifies letterbox, otherwise pillarbox
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* @bar_data1: If @is_letterbox is true, then the value specifies the
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* last line of a horizontal letterbox bar area at top of reconstructed frame.
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* Otherwise, it specifies the last horizontal luminance sample of a vertical pillarbox
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* bar area at the left side of the reconstructed frame
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* @bar_data2: If @is_letterbox is true, then the value specifies the
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* first line of a horizontal letterbox bar area at bottom of reconstructed frame.
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* Otherwise, it specifies the first horizontal
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* luminance sample of a vertical pillarbox bar area at the right side of the reconstructed frame.
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*
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* Bar data should be included in video user data
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* whenever the rectangular picture area containing useful information
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* does not extend to the full height or width of the coded frame
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* and AFD alone is insufficient to describe the extent of the image.
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*
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* Note: either vertical or horizontal bars are specified, but not both.
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*
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* For more details, see:
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*
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* https://www.atsc.org/wp-content/uploads/2015/03/a_53-Part-4-2009.pdf
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*
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* and SMPTE ST2016-1
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*
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* Since: 1.18
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*/
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typedef struct {
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GstMeta meta;
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guint8 field;
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gboolean is_letterbox;
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guint bar_data1;
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guint bar_data2;
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} GstVideoBarMeta;
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GST_VIDEO_API GType gst_video_bar_meta_api_get_type (void);
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#define GST_VIDEO_BAR_META_API_TYPE (gst_video_bar_meta_api_get_type())
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GST_VIDEO_API const GstMetaInfo *gst_video_bar_meta_get_info (void);
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#define GST_VIDEO_BAR_META_INFO (gst_video_bar_meta_get_info())
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#define gst_buffer_get_video_bar_meta(b) \
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((GstVideoBarMeta*)gst_buffer_get_meta((b)))
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/**
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* gst_buffer_get_video_bar_meta:
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* @b: A #GstBuffer
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* @field: 0 for progressive or field 1 and 1 for field 2
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* @is_letterbox: if true then bar data specifies letterbox, otherwise pillarbox
|
||||
* @bar_data1: If @is_letterbox is true, then the value specifies the
|
||||
* last line of a horizontal letterbox bar area at top of reconstructed frame.
|
||||
* Otherwise, it specifies the last horizontal luminance sample of a vertical pillarbox
|
||||
* bar area at the left side of the reconstructed frame
|
||||
* @bar_data2: If @is_letterbox is true, then the value specifies the
|
||||
* first line of a horizontal letterbox bar area at bottom of reconstructed frame.
|
||||
* Otherwise, it specifies the first horizontal
|
||||
* luminance sample of a vertical pillarbox bar area at the right side of the reconstructed frame.
|
||||
* Gets the #GstVideoBarMeta that might be present on @b.
|
||||
*
|
||||
* Since: 1.18
|
||||
*
|
||||
* Returns: The first #GstVideoBarMeta present on @b, or %NULL if
|
||||
* no #GstVideoBarMeta are present
|
||||
*/
|
||||
GST_VIDEO_API
|
||||
GstVideoBarMeta *gst_buffer_add_video_bar_meta (GstBuffer * buffer, guint8 field,
|
||||
gboolean is_letterbox, guint bar_data1, guint bar_data2);
|
||||
|
||||
/* Closed Caption support */
|
||||
/**
|
||||
* GstVideoCaptionType:
|
||||
|
|
|
|||
Loading…
Reference in a new issue