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video: parse number of views

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Parse the number of views in multiview video buffers.
This commit is contained in:
Wim Taymans 2011-08-22 15:57:30 +02:00
parent 860782337c
commit 00a30b5cfd
4 changed files with 25 additions and 6 deletions
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14
docs/design/draft-media-types.txt
View file

@ -3,19 +3,23 @@ Media Types
video/x-raw
width, G_TYPE_INT
width, G_TYPE_INT, mandatory
The width of the image in pixels.
height, G_TYPE_INT
height, G_TYPE_INT, mandatory
The height of the image in pixels
framerate, GST_TYPE_FRACTION
framerate, GST_TYPE_FRACTION, default 0/1
The framerate of the video 0/1 for variable framerate
pixel-aspect-ratio, GST_TYPE_FRACTION
pixel-aspect-ratio, GST_TYPE_FRACTION, default 1/1
The pixel aspect ration of the video
format, G_TYPE_STRING
views, G_TYPE_INT, default 1
The number of views for multiview video. Each buffer contains
multiple GstMetaVideo buffers that describe each view.
format, G_TYPE_STRING, mandatory
The format of the video
* "I420" planar 4:2:0 YUV

4
gst-libs/gst/video/gstmetavideo.h
View file

@ -37,7 +37,11 @@ typedef struct _GstMetaVideoCrop GstMetaVideoCrop;
/**
* GstMetaVideo:
* @meta: parent #GstMeta
* @buffer: the buffer this metadata belongs to
* @flags: additional video flags
* @format: the video format
* @width: the video width
* @height: the video height
* @n_planes: the number of planes in the image
* @offset: array of offsets for the planes
* @stride: array of strides for the planes

10
gst-libs/gst/video/video.c
View file

@ -572,6 +572,7 @@ gst_video_info_init (GstVideoInfo * info)
g_return_if_fail (info != NULL);
memset (info, 0, sizeof (GstVideoInfo));
info->views = 1;
/* arrange for sensible defaults, e.g. if turned into caps */
info->fps_n = 0;
info->fps_d = 1;
@ -622,7 +623,7 @@ gst_video_info_from_caps (GstVideoInfo * info, const GstCaps * caps)
GstStructure *structure;
const gchar *s;
GstVideoFormat format;
gint width, height;
gint width, height, views;
gint fps_n, fps_d;
gboolean interlaced;
gint par_n, par_d;
@ -667,6 +668,11 @@ gst_video_info_from_caps (GstVideoInfo * info, const GstCaps * caps)
else
info->flags &= ~GST_VIDEO_FLAG_INTERLACED;
if (gst_structure_get_int (structure, "views", &views))
info->views = views;
else
info->views = 1;
s = gst_structure_get_string (structure, "color-matrix");
if (s)
info->color_matrix = s;
@ -752,6 +758,8 @@ gst_video_info_to_caps (GstVideoInfo * info)
if (info->chroma_site)
gst_caps_set_simple (caps, "chroma-site", G_TYPE_STRING, info->chroma_site,
NULL);
if (info->views > 1)
gst_caps_set_simple (caps, "views", G_TYPE_INT, info->views, NULL);
return caps;
}

3
gst-libs/gst/video/video.h
View file

@ -329,6 +329,7 @@ typedef enum {
* @flags: additional video flags
* @width: the width of the video
* @height: the height of the video
* @views: the number of views for multiview video
* @size: the default size of one frame
* @color_matrix: the color matrix. Possible values are
* "sdtv" for the standard definition color matrix (as specified in
@ -360,6 +361,7 @@ struct _GstVideoInfo {
gint width;
gint height;
gsize size;
gint views;
const gchar *color_matrix;
const gchar *chroma_site;
@ -386,6 +388,7 @@ struct _GstVideoInfo {
#define GST_VIDEO_INFO_WIDTH(i) ((i)->width)
#define GST_VIDEO_INFO_HEIGHT(i) ((i)->height)
#define GST_VIDEO_INFO_SIZE(i) ((i)->size)
#define GST_VIDEO_INFO_VIEWS(i) ((i)->views)
#define GST_VIDEO_INFO_PAR_N(i) ((i)->par_n)
#define GST_VIDEO_INFO_PAR_D(i) ((i)->par_d)
#define GST_VIDEO_INFO_FPS_N(i) ((i)->fps_n)