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gstreamer/gst-libs/gst/video/video.h
Wim Taymans 6b8617271c video: ensure sign in scale function
2011-08-01 16:50:28 +02:00

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Library <2002> Ronald Bultje <rbultje@ronald.bitfreak.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_VIDEO_H__
#define __GST_VIDEO_H__
#include <gst/gst.h>
G_BEGIN_DECLS
#include <gst/video/video-enumtypes.h>
/**
* GstVideoFormat:
* @GST_VIDEO_FORMAT_UNKNOWN: Unknown or unset video format id
* @GST_VIDEO_FORMAT_I420: planar 4:2:0 YUV
* @GST_VIDEO_FORMAT_YV12: planar 4:2:0 YVU (like I420 but UV planes swapped)
* @GST_VIDEO_FORMAT_YUY2: packed 4:2:2 YUV (Y0-U0-Y1-V0 Y2-U2-Y3-V2 Y4 ...)
* @GST_VIDEO_FORMAT_UYVY: packed 4:2:2 YUV (U0-Y0-V0-Y1 U2-Y2-V2-Y3 U4 ...)
* @GST_VIDEO_FORMAT_AYUV: packed 4:4:4 YUV with alpha channel (A0-Y0-U0-V0 ...)
* @GST_VIDEO_FORMAT_RGBx: sparse rgb packed into 32 bit, space last
* @GST_VIDEO_FORMAT_BGRx: sparse reverse rgb packed into 32 bit, space last
* @GST_VIDEO_FORMAT_xRGB: sparse rgb packed into 32 bit, space first
* @GST_VIDEO_FORMAT_xBGR: sparse reverse rgb packed into 32 bit, space first
* @GST_VIDEO_FORMAT_RGBA: rgb with alpha channel last
* @GST_VIDEO_FORMAT_BGRA: reverse rgb with alpha channel last
* @GST_VIDEO_FORMAT_ARGB: rgb with alpha channel first
* @GST_VIDEO_FORMAT_ABGR: reverse rgb with alpha channel first
* @GST_VIDEO_FORMAT_RGB: rgb
* @GST_VIDEO_FORMAT_BGR: reverse rgb
* @GST_VIDEO_FORMAT_Y41B: planar 4:1:1 YUV (Since: 0.10.18)
* @GST_VIDEO_FORMAT_Y42B: planar 4:2:2 YUV (Since: 0.10.18)
* @GST_VIDEO_FORMAT_YVYU: packed 4:2:2 YUV (Y0-V0-Y1-U0 Y2-V2-Y3-U2 Y4 ...) (Since: 0.10.23)
* @GST_VIDEO_FORMAT_Y444: planar 4:4:4 YUV (Since: 0.10.24)
* @GST_VIDEO_FORMAT_v210: packed 4:2:2 10-bit YUV, complex format (Since: 0.10.24)
* @GST_VIDEO_FORMAT_v216: packed 4:2:2 16-bit YUV, Y0-U0-Y1-V1 order (Since: 0.10.24)
* @GST_VIDEO_FORMAT_NV12: planar 4:2:0 YUV with interleaved UV plane (Since: 0.10.26)
* @GST_VIDEO_FORMAT_NV21: planar 4:2:0 YUV with interleaved VU plane (Since: 0.10.26)
* @GST_VIDEO_FORMAT_GRAY8: 8-bit grayscale (Since: 0.10.29)
* @GST_VIDEO_FORMAT_GRAY16_BE: 16-bit grayscale, most significant byte first (Since: 0.10.29)
* @GST_VIDEO_FORMAT_GRAY16_LE: 16-bit grayscale, least significant byte first (Since: 0.10.29)
* @GST_VIDEO_FORMAT_v308: packed 4:4:4 YUV (Since: 0.10.29)
* @GST_VIDEO_FORMAT_Y800: same as GST_VIDEO_FORMAT_GRAY8 (Since: 0.10.30)
* @GST_VIDEO_FORMAT_Y16: same as GST_VIDEO_FORMAT_GRAY16_LE (Since: 0.10.30)
* @GST_VIDEO_FORMAT_RGB16: rgb 5-6-5 bits per component (Since: 0.10.30)
* @GST_VIDEO_FORMAT_BGR16: reverse rgb 5-6-5 bits per component (Since: 0.10.30)
* @GST_VIDEO_FORMAT_RGB15: rgb 5-5-5 bits per component (Since: 0.10.30)
* @GST_VIDEO_FORMAT_BGR15: reverse rgb 5-5-5 bits per component (Since: 0.10.30)
* @GST_VIDEO_FORMAT_UYVP: packed 10-bit 4:2:2 YUV (U0-Y0-V0-Y1 U2-Y2-V2-Y3 U4 ...) (Since: 0.10.31)
* @GST_VIDEO_FORMAT_A420: planar 4:4:2:0 AYUV (Since: 0.10.31)
* @GST_VIDEO_FORMAT_RGB8_PALETTED: 8-bit paletted RGB (Since: 0.10.32)
* @GST_VIDEO_FORMAT_YUV9: planar 4:1:0 YUV (Since: 0.10.32)
* @GST_VIDEO_FORMAT_YVU9: planar 4:1:0 YUV (like YUV9 but UV planes swapped) (Since: 0.10.32)
* @GST_VIDEO_FORMAT_IYU1: packed 4:1:1 YUV (Cb-Y0-Y1-Cr-Y2-Y3 ...) (Since: 0.10.32)
* @GST_VIDEO_FORMAT_ARGB64: rgb with alpha channel first, 16 bits per channel (Since: 0.10.33)
* @GST_VIDEO_FORMAT_AYUV64: packed 4:4:4 YUV with alpha channel, 16 bits per channel (A0-Y0-U0-V0 ...) (Since: 0.10.33)
* @GST_VIDEO_FORMAT_r210: packed 4:4:4 RGB, 10 bits per channel (Since: 0.10.33)
*
* Enum value describing the most common video formats.
*/
typedef enum {
GST_VIDEO_FORMAT_UNKNOWN,
GST_VIDEO_FORMAT_I420,
GST_VIDEO_FORMAT_YV12,
GST_VIDEO_FORMAT_YUY2,
GST_VIDEO_FORMAT_UYVY,
GST_VIDEO_FORMAT_AYUV,
GST_VIDEO_FORMAT_RGBx,
GST_VIDEO_FORMAT_BGRx,
GST_VIDEO_FORMAT_xRGB,
GST_VIDEO_FORMAT_xBGR,
GST_VIDEO_FORMAT_RGBA,
GST_VIDEO_FORMAT_BGRA,
GST_VIDEO_FORMAT_ARGB,
GST_VIDEO_FORMAT_ABGR,
GST_VIDEO_FORMAT_RGB,
GST_VIDEO_FORMAT_BGR,
GST_VIDEO_FORMAT_Y41B,
GST_VIDEO_FORMAT_Y42B,
GST_VIDEO_FORMAT_YVYU,
GST_VIDEO_FORMAT_Y444,
GST_VIDEO_FORMAT_v210,
GST_VIDEO_FORMAT_v216,
GST_VIDEO_FORMAT_NV12,
GST_VIDEO_FORMAT_NV21,
GST_VIDEO_FORMAT_GRAY8,
GST_VIDEO_FORMAT_GRAY16_BE,
GST_VIDEO_FORMAT_GRAY16_LE,
GST_VIDEO_FORMAT_v308,
GST_VIDEO_FORMAT_Y800,
GST_VIDEO_FORMAT_Y16,
GST_VIDEO_FORMAT_RGB16,
GST_VIDEO_FORMAT_BGR16,
GST_VIDEO_FORMAT_RGB15,
GST_VIDEO_FORMAT_BGR15,
GST_VIDEO_FORMAT_UYVP,
GST_VIDEO_FORMAT_A420,
GST_VIDEO_FORMAT_RGB8_PALETTED,
GST_VIDEO_FORMAT_YUV9,
GST_VIDEO_FORMAT_YVU9,
GST_VIDEO_FORMAT_IYU1,
GST_VIDEO_FORMAT_ARGB64,
GST_VIDEO_FORMAT_AYUV64,
GST_VIDEO_FORMAT_r210
} GstVideoFormat;
#define GST_VIDEO_MAX_PLANES 4
#define GST_VIDEO_MAX_COMPONENTS 4
typedef struct _GstVideoFormatInfo GstVideoFormatInfo;
/**
* GstVideoFormatFlags:
* @GST_VIDEO_FORMAT_FLAG_YUV: The video format is YUV, components are numbered
* 0=Y, 1=U, 2=V.
* @GST_VIDEO_FORMAT_FLAG_RGB: The video format is RGB, components are numbered
* 0=R, 1=G, 2=B.
* @GST_VIDEO_FORMAT_FLAG_GRAY: The video is gray, there is one gray component
* with index 0.
* @GST_VIDEO_FORMAT_FLAG_ALPHA: The video format has an alpha components with
* the number 3.
* @GST_VIDEO_FORMAT_FLAG_LE: The video format has data stored in little
* endianness.
* @GST_VIDEO_FORMAT_FLAG_PALETTE: The video format has a palette.
* @GST_VIDEO_FORMAT_FLAG_COMPLEX: The video format has a complex layout that
* can't be described with the usual information in the #GstVideoFormatInfo.
*
* The different video flags that a format info can have.
*/
typedef enum
{
GST_VIDEO_FORMAT_FLAG_YUV = (1 << 0),
GST_VIDEO_FORMAT_FLAG_RGB = (1 << 1),
GST_VIDEO_FORMAT_FLAG_GRAY = (1 << 2),
GST_VIDEO_FORMAT_FLAG_ALPHA = (1 << 3),
GST_VIDEO_FORMAT_FLAG_LE = (1 << 4),
GST_VIDEO_FORMAT_FLAG_PALETTE = (1 << 5),
GST_VIDEO_FORMAT_FLAG_COMPLEX = (1 << 6)
} GstVideoFormatFlags;
#define GST_VIDEO_COMP_Y 0
#define GST_VIDEO_COMP_U 1
#define GST_VIDEO_COMP_V 2
#define GST_VIDEO_COMP_R 0
#define GST_VIDEO_COMP_G 1
#define GST_VIDEO_COMP_B 2
#define GST_VIDEO_COMP_A 3
/**
* GstVideoFormatUnpack:
* @info: a #GstVideoFormatInfo
* @dest: a destination array
* @data: pointers to the data planes
* @stride: strides of the planes
* @x: the x position in the image to start from
* @y: the y position in the image to start from
* @width: the amount of pixels to unpack.
*
* Unpacks @width pixels from the given planes and strides containing data of
* format @info. The pixels will be unpacked into @dest which each component
* interleaved. @dest should at least be big enough to hold @width *
* n_components * unpack_size bytes.
*/
typedef void (*GstVideoFormatUnpack) (GstVideoFormatInfo *info, gpointer dest,
const gpointer data[GST_VIDEO_MAX_PLANES],
const gint stride[GST_VIDEO_MAX_PLANES],
gint x, gint y, gint width);
/**
* GstVideoFormatPack:
* @info: a #GstVideoFormatInfo
* @src: a source array
* @data: pointers to the destination data planes
* @stride: strides of the destination planes
* @x: the x position in the image to pack to
* @y: the y position in the image to pack to
* @width: the amount of pixels to pack.
*
* Packs @width pixels from @src to the given planes and strides in the
* format @info. The pixels from source have each component interleaved
* and will be packed into @src.
*/
typedef void (*GstVideoFormatPack) (GstVideoFormatInfo *info, const gpointer src,
gpointer data[GST_VIDEO_MAX_PLANES],
const gint stride[GST_VIDEO_MAX_PLANES],
gint x, gint y, gint width);
/**
* GstVideoFormatInfo:
* @format: #GstVideoFormat
* @name: string representation of the format
* @flags: #GstVideoFormatFlags
* @bits: The number of bits used to pack data items. This can be 8 when the
* pixels are stored in bytes. for values > 8 multiple bytes should be read
* according to the endianness flag before applying the shift and mask.
* @n_components: the number of components in the video format.
* @shift: the number of bits to shift away to get the component data
* @depth: the depth in bits for each component
* @pixel_stride: the pixel stride of each component. This is the amount of
* bytes to the pixel immediately to the right. When bits < 8, the stride is
* expressed in bits.
* @n_planes: the number of planes for this format. The number of planes can be
* less than the amount of components when multiple components are packed into
* one plane.
* @plane: the plane number where a component can be found
* @offset: the offset in the plane where the first pixel of the components
* can be found. If bits < 8 the amount is specified in bits.
* @w_sub: subsampling factor of the width for the component. Use
* GST_VIDEO_SUB_SCALE to scale a width.
* @h_sub: subsampling factor of the height for the component. Use
* GST_VIDEO_SUB_SCALE to scale a height.
* @unpack_size: the size in bytes of each component item in the unpacked
* format.
* @unpack_func: an unpack function for this format
* @pack_func: an pack function for this format
*
* Information for a video format.
*/
struct _GstVideoFormatInfo {
GstVideoFormat format;
const gchar *name;
GstVideoFormatFlags flags;
guint bits;
guint n_components;
guint shift[GST_VIDEO_MAX_COMPONENTS];
guint depth[GST_VIDEO_MAX_COMPONENTS];
gint pixel_stride[GST_VIDEO_MAX_COMPONENTS];
guint n_planes;
guint plane[GST_VIDEO_MAX_COMPONENTS];
guint offset[GST_VIDEO_MAX_COMPONENTS];
guint w_sub[GST_VIDEO_MAX_COMPONENTS];
guint h_sub[GST_VIDEO_MAX_COMPONENTS];
guint unpack_size;
GstVideoFormatUnpack unpack_func;
GstVideoFormatPack pack_func;
};
#define GST_VIDEO_FORMAT_INFO_FORMAT(info) ((info)->format)
#define GST_VIDEO_FORMAT_INFO_NAME(info) ((info)->name)
#define GST_VIDEO_FORMAT_INFO_FLAGS(info) ((info)->flags)
#define GST_VIDEO_FORMAT_INFO_IS_YUV(info) ((info)->flags & GST_VIDEO_FORMAT_FLAG_YUV)
#define GST_VIDEO_FORMAT_INFO_IS_RGB(info) ((info)->flags & GST_VIDEO_FORMAT_FLAG_RGB)
#define GST_VIDEO_FORMAT_INFO_IS_GRAY(info) ((info)->flags & GST_VIDEO_FORMAT_FLAG_GRAY)
#define GST_VIDEO_FORMAT_INFO_HAS_ALPHA(info) ((info)->flags & GST_VIDEO_FORMAT_FLAG_ALPHA)
#define GST_VIDEO_FORMAT_INFO_N_COMPONENTS(info) ((info)->n_components)
#define GST_VIDEO_FORMAT_INFO_DEPTH(info,c) ((info)->depth[c])
#define GST_VIDEO_FORMAT_INFO_PSTRIDE(info,c) ((info)->pixel_stride[c])
#define GST_VIDEO_FORMAT_INFO_N_PLANES(info) ((info)->n_planes)
#define GST_VIDEO_FORMAT_INFO_PLANE(info,c) ((info)->plane[c])
#define GST_VIDEO_FORMAT_INFO_OFFSET(info,c) ((info)->offset[c])
#define GST_VIDEO_FORMAT_INFO_W_SUB(info,c) ((info)->w_sub[c])
#define GST_VIDEO_FORMAT_INFO_H_SUB(info,c) ((info)->h_sub[c])
#define GST_VIDEO_SUB_SCALE(scale,val) (-((-((gint)val))>>(scale)))
#define GST_VIDEO_FORMAT_INFO_SCALE_WIDTH(info,c,w) GST_VIDEO_SUB_SCALE ((info)->w_sub[(c)],(w))
#define GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT(info,c,h) GST_VIDEO_SUB_SCALE ((info)->h_sub[(c)],(h))
#define GST_VIDEO_FORMAT_INFO_DATA(info,planes,comp) \
(((guint8*)(planes)[info->plane[comp]]) + info->offset[comp])
#define GST_VIDEO_FORMAT_INFO_STRIDE(info,strides,comp) ((strides)[info->plane[comp]])
/* format properties */
GstVideoFormat gst_video_format_from_masks (gint depth, gint bpp, gint endianness,
gint red_mask, gint green_mask,
gint blue_mask, gint alpha_mask) G_GNUC_CONST;
GstVideoFormat gst_video_format_from_fourcc (guint32 fourcc) G_GNUC_CONST;
GstVideoFormat gst_video_format_from_string (const gchar *format) G_GNUC_CONST;
guint32 gst_video_format_to_fourcc (GstVideoFormat format) G_GNUC_CONST;
const gchar * gst_video_format_to_string (GstVideoFormat format) G_GNUC_CONST;
const GstVideoFormatInfo *
gst_video_format_get_info (GstVideoFormat format) G_GNUC_CONST;
typedef struct _GstVideoInfo GstVideoInfo;
typedef struct _GstVideoFrame GstVideoFrame;
/**
* GstVideoFlags:
* @GST_META_VIDEO_FLAG_NONE: no flags
* @GST_META_VIDEO_FLAG_INTERLACED:
* @GST_META_VIDEO_FLAG_TTF:
* @GST_META_VIDEO_FLAG_RFF:
* @GST_META_VIDEO_FLAG_ONEFIELD:
* @GST_META_VIDEO_FLAG_TELECINE:
* @GST_META_VIDEO_FLAG_PROGRESSIVE:
*
* Extra video flags
*/
typedef enum {
GST_VIDEO_FLAG_NONE = 0,
GST_VIDEO_FLAG_INTERLACED = (1 << 0),
GST_VIDEO_FLAG_TTF = (1 << 1),
GST_VIDEO_FLAG_RFF = (1 << 2),
GST_VIDEO_FLAG_ONEFIELD = (1 << 3),
GST_VIDEO_FLAG_TELECINE = (1 << 4),
GST_VIDEO_FLAG_PROGRESSIVE = (1 << 5)
} GstVideoFlags;
/**
* GstVideoInfo:
* @finfo: the format info of the video
* @flags: additional video flags
* @width: the width of the video
* @height: the height of the 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
* Rec. ITU-R BT.470-6) or "hdtv" for the high definition color
* matrix (as specified in Rec. ITU-R BT.709)
* @chroma_site: the chroma siting. Possible values are
* "mpeg2" for MPEG-2 style chroma siting (co-sited horizontally,
* halfway-sited vertically), "jpeg" for JPEG and Theora style
* chroma siting (halfway-sited both horizontally and vertically).
* Other chroma site values are possible, but uncommon.
* @palette: a buffer with palette data
* @par_n: the pixel-aspect-ratio numerator
* @par_d: the pixel-aspect-ratio demnominator
* @fps_n: the framerate numerator
* @fps_d: the framerate demnominator
* @offset: offsets of the planes
* @stride: strides of the planes
*
* Information describing image properties. This information can be filled
* in from GstCaps with gst_video_info_from_caps(). The information is also used
* to store the specific video info when mapping a video frame with
* gst_video_frame_map().
*
* Use the provided macros to access the info in this structure.
*/
struct _GstVideoInfo {
const GstVideoFormatInfo *finfo;
GstVideoFlags flags;
gint width;
gint height;
guint size;
const gchar *color_matrix;
const gchar *chroma_site;
GstBuffer *palette;
gint par_n;
gint par_d;
gint fps_n;
gint fps_d;
gsize offset[GST_VIDEO_MAX_PLANES];
gint stride[GST_VIDEO_MAX_PLANES];
};
/* general info */
#define GST_VIDEO_INFO_FORMAT(i) (GST_VIDEO_FORMAT_INFO_FORMAT((i)->finfo))
#define GST_VIDEO_INFO_NAME(i) (GST_VIDEO_FORMAT_INFO_NAME((i)->finfo))
#define GST_VIDEO_INFO_FLAGS(i) ((i)->flags)
#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_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)
#define GST_VIDEO_INFO_FPS_D(i) ((i)->fps_d)
/* dealing with planes */
#define GST_VIDEO_INFO_N_PLANES(i) (GST_VIDEO_FORMAT_INFO_N_PLANES((i)->finfo))
#define GST_VIDEO_INFO_PLANE_OFFSET(i,p) ((i)->offset[p])
#define GST_VIDEO_INFO_PLANE_STRIDE(i,p) ((i)->stride[p])
/* dealing with components */
#define GST_VIDEO_INFO_N_COMPONENTS(i) GST_VIDEO_FORMAT_INFO_N_COMPONENTS((i)->finfo)
#define GST_VIDEO_INFO_COMP_DATA(i,d,c) GST_VIDEO_FORMAT_INFO_DATA((i)->finfo,d,c)
#define GST_VIDEO_INFO_COMP_STRIDE(i,c) GST_VIDEO_FORMAT_INFO_STRIDE((i)->finfo,(i)->stride,c)
#define GST_VIDEO_INFO_COMP_WIDTH(i,c) GST_VIDEO_FORMAT_INFO_SCALE_WIDTH((i)->finfo,c,(i)->width)
#define GST_VIDEO_INFO_COMP_HEIGHT(i,c) GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT((i)->finfo,c,(i)->height)
#define GST_VIDEO_INFO_COMP_PLANE(i,c) GST_VIDEO_FORMAT_INFO_PLANE((i)->finfo,c)
#define GST_VIDEO_INFO_COMP_OFFSET(i,c) GST_VIDEO_FORMAT_INFO_OFFSET((i)->finfo,c)
#define GST_VIDEO_INFO_COMP_PSTRIDE(i,c) GST_VIDEO_FORMAT_INFO_PSTRIDE((i)->finfo,c)
void gst_video_info_init (GstVideoInfo *info);
void gst_video_info_set_format (GstVideoInfo *info, GstVideoFormat format,
guint width, guint height);
gboolean gst_video_info_from_caps (GstVideoInfo *info, const GstCaps * caps);
GstCaps * gst_video_info_to_caps (GstVideoInfo *info);
gboolean gst_video_info_convert (GstVideoInfo *info,
GstFormat src_format,
gint64 src_value,
GstFormat dest_format,
gint64 *dest_value);
/**
* GstVideoFrame:
* @info: the #GstVideoInfo
* @buffer: the mapped buffer
* @meta: pointer to metadata if any
* @data: pointers to the plane data
*
* A video frame obtained from gst_video_frame_map()
*/
struct _GstVideoFrame {
GstVideoInfo info;
GstBuffer *buffer;
gpointer meta;
gpointer data[GST_VIDEO_MAX_PLANES];
};
gboolean gst_video_frame_map (GstVideoFrame *frame, GstVideoInfo *info,
GstBuffer *buffer, GstMapFlags flags);
void gst_video_frame_unmap (GstVideoFrame *frame);
gboolean gst_video_frame_copy (GstVideoFrame *dest, const GstVideoFrame *src);
/* general info */
#define GST_VIDEO_FRAME_FORMAT(f) (GST_VIDEO_INFO_FORMAT(&(f)->info))
#define GST_VIDEO_FRAME_WIDTH(f) (GST_VIDEO_INFO_WIDTH(&(f)->info))
#define GST_VIDEO_FRAME_HEIGHT(f) (GST_VIDEO_INFO_HEIGHT(&(f)->info))
#define GST_VIDEO_FRAME_SIZE(f) (GST_VIDEO_INFO_SIZE(&(f)->info))
/* dealing with planes */
#define GST_VIDEO_FRAME_N_PLANES(f) (GST_VIDEO_INFO_N_PLANES(&(f)->info))
#define GST_VIDEO_FRAME_PLANE_DATA(f,p) ((f)->data[p])
#define GST_VIDEO_FRAME_PLANE_OFFSET(f,p) (GST_VIDEO_INFO_PLANE_OFFSET(&(f)->info,p))
#define GST_VIDEO_FRAME_PLANE_STRIDE(f,p) (GST_VIDEO_INFO_PLANE_STRIDE(&(f)->info,p))
/* dealing with components */
#define GST_VIDEO_FRAME_N_COMPONENTS(f) GST_VIDEO_INFO_N_COMPONENTS(&(f)->info)
#define GST_VIDEO_FRAME_COMP_DATA(f,c) GST_VIDEO_INFO_COMP_DATA(&(f)->info,(f)->data,c)
#define GST_VIDEO_FRAME_COMP_STRIDE(f,c) GST_VIDEO_INFO_COMP_STRIDE(&(f)->info,c)
#define GST_VIDEO_FRAME_COMP_WIDTH(f,c) GST_VIDEO_INFO_COMP_WIDTH(&(f)->info,c)
#define GST_VIDEO_FRAME_COMP_HEIGHT(f,c) GST_VIDEO_INFO_COMP_HEIGHT(&(f)->info,c)
#define GST_VIDEO_FRAME_COMP_PLANE(f,c) GST_VIDEO_INFO_COMP_PLANE(&(f)->info,c)
#define GST_VIDEO_FRAME_COMP_OFFSET(f,c) GST_VIDEO_INFO_COMP_OFFSET(&(f)->info,c)
#define GST_VIDEO_FRAME_COMP_PSTRIDE(f,c) GST_VIDEO_INFO_COMP_PSTRIDE(&(f)->info,c)
#define GST_VIDEO_SIZE_RANGE "(int) [ 1, max ]"
#define GST_VIDEO_FPS_RANGE "(fraction) [ 0, max ]"
#define GST_VIDEO_FORMATS_ALL "{ I420, YV12, YUY2, UYVY, AYUV, RGBx, " \
"BGRx, xRGB, xBGR, RGBA, BGRA, ARGB, ABGR, RGB, BGR, Y41B, Y42B, " \
"YVYU, Y444, v210, v216, NV12, NV21, GRAY8, GRAY16_BE, GRAY16_LE, " \
"v308, Y800, Y16, RGB16, BGR16, RGB15, BGR15, UYVP, A420, " \
"RGB8_PALETTED, YUV9, YVU9, IYU1, ARGB64, AYUV64, r210 }"
/**
* GST_VIDEO_CAPS_MAKE:
* @format: string format that describes the pixel layout, as string
* (e.g. "I420", "RGB", "YV12", "YUY2", "AYUV", etc.)
*
* Generic caps string for video, for use in pad templates.
*/
#define GST_VIDEO_CAPS_MAKE(format) \
"video/x-raw, " \
"format = (string) " format ", " \
"width = " GST_VIDEO_SIZE_RANGE ", " \
"height = " GST_VIDEO_SIZE_RANGE ", " \
"framerate = " GST_VIDEO_FPS_RANGE
/* buffer flags */
/**
* GST_VIDEO_BUFFER_TFF:
*
* If the #GstBuffer is interlaced, then the first field in the video frame is
* the top field. If unset, the bottom field is first.
*
* Since: 0.10.23
*/
#define GST_VIDEO_BUFFER_TFF GST_BUFFER_FLAG_MEDIA1
/**
* GST_VIDEO_BUFFER_RFF:
*
* If the #GstBuffer is interlaced, then the first field (as defined by the
* %GST_VIDEO_BUFFER_TFF flag setting) is repeated.
*
* Since: 0.10.23
*/
#define GST_VIDEO_BUFFER_RFF GST_BUFFER_FLAG_MEDIA2
/**
* GST_VIDEO_BUFFER_ONEFIELD:
*
* If the #GstBuffer is interlaced, then only the first field (as defined by the
* %GST_VIDEO_BUFFER_TFF flag setting) is to be displayed.
*
* Since: 0.10.23
*/
#define GST_VIDEO_BUFFER_ONEFIELD GST_BUFFER_FLAG_MEDIA3
/**
* GST_VIDEO_BUFFER_PROGRESSIVE:
*
* If the #GstBuffer is telecined, then the buffer is progressive if the
* %GST_VIDEO_BUFFER_PROGRESSIVE flag is set, else it is telecine mixed.
*
* Since: 0.10.33
*/
#define GST_VIDEO_BUFFER_PROGRESSIVE GST_BUFFER_FLAG_MEDIA4
/* functions */
gboolean gst_video_calculate_display_ratio (guint * dar_n,
guint * dar_d,
guint video_width,
guint video_height,
guint video_par_n,
guint video_par_d,
guint display_par_n,
guint display_par_d);
gboolean gst_video_parse_caps_framerate (GstCaps * caps, int *fps_n, int *fps_d);
GstBuffer * gst_video_parse_caps_palette (GstCaps * caps);
/* video still frame event creation and parsing */
GstEvent * gst_video_event_new_still_frame (gboolean in_still);
gboolean gst_video_event_parse_still_frame (GstEvent * event, gboolean * in_still);
/* convert/encode video frame from one format to another */
typedef void (*GstVideoConvertFrameCallback) (GstBuffer * buf, GError *error, gpointer user_data);
void gst_video_convert_frame_async (GstBuffer * buf,
GstCaps * from_caps,
const GstCaps * to_caps,
GstClockTime timeout,
GstVideoConvertFrameCallback callback,
gpointer user_data,
GDestroyNotify destroy_notify);
GstBuffer * gst_video_convert_frame (GstBuffer * buf,
GstCaps * from_caps,
const GstCaps * to_caps,
GstClockTime timeout,
GError ** error);
G_END_DECLS
#endif /* __GST_VIDEO_H__ */
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