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video: rework part 2

Browse source 
Update docs.
Add method to get number of components.
Implement method to calculate defaults from format and dimensions.
Improve caps parsing.
Implement GstVideoInfo to caps conversion.
This commit is contained in:
Wim Taymans 2011-06-16 19:35:27 +02:00
parent a7ae8d41aa
commit 1aa7ad7dae
2 changed files with 321 additions and 474 deletions
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775
gst-libs/gst/video/video.c
View file

@ -27,6 +27,10 @@
#include "video.h" #include "video.h"
static int get_size (GstVideoFormat format, int width, int height);
static int get_stride (GstVideoFormat format, int plane, int width);
static int fill_planes (GstVideoInfo * info);
typedef enum typedef enum
{ {
VIDEO_FLAG_YUV = (1 << 0), VIDEO_FLAG_YUV = (1 << 0),
@ -41,19 +45,21 @@ typedef struct
GstVideoFormat format; GstVideoFormat format;
guint32 fourcc; guint32 fourcc;
VideoFlags flags; VideoFlags flags;
guint n_comp;
guint depth[GST_VIDEO_MAX_PLANES]; guint depth[GST_VIDEO_MAX_PLANES];
guint n_planes;
} VideoFormat; } VideoFormat;
#define COMP0 { 0, 0, 0, 0 } #define COMP0 0, { 0, 0, 0, 0 }
#define COMP8 { 8, 0, 0, 0 } #define COMP8 1, { 8, 0, 0, 0 }
#define COMP888 { 8, 8, 8, 0 } #define COMP888 3, { 8, 8, 8, 0 }
#define COMP8888 { 8, 8, 8, 8 } #define COMP8888 4, { 8, 8, 8, 8 }
#define COMP10_10_10 { 10, 10, 10, 0 } #define COMP10_10_10 3, { 10, 10, 10, 0 }
#define COMP16 { 16, 0, 0, 0 } #define COMP16 1, { 16, 0, 0, 0 }
#define COMP16_16_16 { 16, 0, 0, 0 } #define COMP16_16_16 3, { 16, 16, 16, 0 }
#define COMP16_16_16_16 { 16, 0, 0, 0 } #define COMP16_16_16_16 4, { 16, 16, 16, 16 }
#define COMP555 { 5, 5, 5, 0 } #define COMP555 3, { 5, 5, 5, 0 }
#define COMP565 { 5, 6, 5, 0 } #define COMP565 3, { 5, 6, 5, 0 }
#define MAKE_YUV_FORMAT(name, fourcc, comp) \ #define MAKE_YUV_FORMAT(name, fourcc, comp) \
{ G_STRINGIFY(name), GST_VIDEO_FORMAT_ ##name, fourcc, VIDEO_FLAG_YUV, comp } { G_STRINGIFY(name), GST_VIDEO_FORMAT_ ##name, fourcc, VIDEO_FLAG_YUV, comp }
@ -132,72 +138,6 @@ static VideoFormat formats[] = {
* </refsect2> * </refsect2>
*/ */
/**
* gst_video_frame_rate:
* @pad: pointer to a #GstPad
*
* A convenience function to retrieve a GValue holding the framerate
* from the caps on a pad.
*
* The pad needs to have negotiated caps containing a framerate property.
*
* Returns: NULL if the pad has no configured caps or the configured caps
* do not contain a framerate.
*
*/
const GValue *
gst_video_frame_rate (GstPad * pad)
{
const GValue *fps;
gchar *fps_string;
GstCaps *caps = NULL;
GstStructure *structure;
/* get pad caps */
caps = gst_pad_get_current_caps (pad);
if (caps == NULL)
goto no_caps;
structure = gst_caps_get_structure (caps, 0);
if ((fps = gst_structure_get_value (structure, "framerate")) == NULL)
goto no_framerate;
if (!GST_VALUE_HOLDS_FRACTION (fps))
goto no_fraction;
fps_string = gst_value_serialize (fps);
GST_DEBUG ("Framerate request on pad %s:%s: %s",
GST_DEBUG_PAD_NAME (pad), fps_string);
g_free (fps_string);
gst_caps_unref (caps);
return fps;
/* ERRORS */
no_caps:
{
g_warning ("gstvideo: failed to get caps of pad %s:%s",
GST_DEBUG_PAD_NAME (pad));
return NULL;
}
no_framerate:
{
g_warning ("gstvideo: failed to get framerate property of pad %s:%s",
GST_DEBUG_PAD_NAME (pad));
gst_caps_unref (caps);
return NULL;
}
no_fraction:
{
g_warning
("gstvideo: framerate property of pad %s:%s is not of type Fraction",
GST_DEBUG_PAD_NAME (pad));
gst_caps_unref (caps);
return NULL;
}
}
/** /**
* gst_video_calculate_display_ratio: * gst_video_calculate_display_ratio:
* @dar_n: Numerator of the calculated display_ratio * @dar_n: Numerator of the calculated display_ratio
@ -257,309 +197,6 @@ error_overflow:
} }
} }
/**
* gst_video_format_parse_caps_interlaced:
* @caps: the fixed #GstCaps to parse
* @interlaced: whether @caps represents interlaced video or not, may be NULL (output)
*
* Extracts whether the caps represents interlaced content or not and places it
* in @interlaced.
*
* Since: 0.10.23
*
* Returns: TRUE if @caps was parsed correctly.
*/
gboolean
gst_video_format_parse_caps_interlaced (GstCaps * caps, gboolean * interlaced)
{
GstStructure *structure;
if (!gst_caps_is_fixed (caps))
return FALSE;
structure = gst_caps_get_structure (caps, 0);
if (interlaced) {
if (!gst_structure_get_boolean (structure, "interlaced", interlaced))
*interlaced = FALSE;
}
return TRUE;
}
/**
* gst_video_parse_caps_color_matrix:
* @caps: the fixed #GstCaps to parse
*
* Extracts the color matrix used by the caps. 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)
*
* Since: 0.10.29
*
* Returns: a color matrix string, or NULL if no color matrix could be
* determined.
*/
const char *
gst_video_parse_caps_color_matrix (GstCaps * caps)
{
GstStructure *structure;
const char *s;
if (!gst_caps_is_fixed (caps))
return NULL;
structure = gst_caps_get_structure (caps, 0);
s = gst_structure_get_string (structure, "color-matrix");
if (s)
return s;
if (gst_structure_has_name (structure, "video/x-raw-yuv")) {
return "sdtv";
}
return NULL;
}
/**
* gst_video_parse_caps_chroma_site:
* @caps: the fixed #GstCaps to parse
*
* Extracts the chroma site used by the caps. 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.
*
* When no chroma site is specified in the caps, it should be assumed
* to be "mpeg2".
*
* Since: 0.10.29
*
* Returns: a chroma site string, or NULL if no chroma site could be
* determined.
*/
const char *
gst_video_parse_caps_chroma_site (GstCaps * caps)
{
GstStructure *structure;
const char *s;
if (!gst_caps_is_fixed (caps))
return NULL;
structure = gst_caps_get_structure (caps, 0);
s = gst_structure_get_string (structure, "chroma-site");
if (s)
return s;
if (gst_structure_has_name (structure, "video/x-raw-yuv")) {
return "mpeg2";
}
return NULL;
}
/**
* gst_video_parse_caps_framerate:
* @caps: pointer to a #GstCaps instance
* @fps_n: pointer to integer to hold numerator of frame rate (output)
* @fps_d: pointer to integer to hold denominator of frame rate (output)
*
* Extracts the frame rate from @caps and places the values in the locations
* pointed to by @fps_n and @fps_d. Returns TRUE if the values could be
* parsed correctly, FALSE if not.
*
* This function can be used with #GstCaps that have any media type; it
* is not limited to formats handled by #GstVideoFormat.
*
* Since: 0.10.16
*
* Returns: TRUE if @caps was parsed correctly.
*/
gboolean
gst_video_parse_caps_framerate (GstCaps * caps, int *fps_n, int *fps_d)
{
GstStructure *structure;
if (!gst_caps_is_fixed (caps))
return FALSE;
structure = gst_caps_get_structure (caps, 0);
return gst_structure_get_fraction (structure, "framerate", fps_n, fps_d);
}
/**
* gst_video_parse_caps_pixel_aspect_ratio:
* @caps: pointer to a #GstCaps instance
* @par_n: pointer to numerator of pixel aspect ratio (output)
* @par_d: pointer to denominator of pixel aspect ratio (output)
*
* Extracts the pixel aspect ratio from @caps and places the values in
* the locations pointed to by @par_n and @par_d. Returns TRUE if the
* values could be parsed correctly, FALSE if not.
*
* This function can be used with #GstCaps that have any media type; it
* is not limited to formats handled by #GstVideoFormat.
*
* Since: 0.10.16
*
* Returns: TRUE if @caps was parsed correctly.
*/
gboolean
gst_video_parse_caps_pixel_aspect_ratio (GstCaps * caps, int *par_n, int *par_d)
{
GstStructure *structure;
if (!gst_caps_is_fixed (caps))
return FALSE;
structure = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_fraction (structure, "pixel-aspect-ratio",
par_n, par_d)) {
*par_n = 1;
*par_d = 1;
}
return TRUE;
}
/**
* gst_video_format_new_caps_interlaced:
* @format: the #GstVideoFormat describing the raw video format
* @width: width of video
* @height: height of video
* @framerate_n: numerator of frame rate
* @framerate_d: denominator of frame rate
* @par_n: numerator of pixel aspect ratio
* @par_d: denominator of pixel aspect ratio
* @interlaced: #TRUE if the format is interlaced
*
* Creates a new #GstCaps object based on the parameters provided.
*
* Since: 0.10.23
*
* Returns: a new #GstCaps object, or NULL if there was an error
*/
GstCaps *
gst_video_format_new_caps_interlaced (GstVideoFormat format,
int width, int height, int framerate_n, int framerate_d, int par_n,
int par_d, gboolean interlaced)
{
GstCaps *res;
res =
gst_video_format_new_caps (format, width, height, framerate_n,
framerate_d, par_n, par_d);
if (interlaced && (res != NULL))
gst_caps_set_simple (res, "interlaced", G_TYPE_BOOLEAN, TRUE, NULL);
return res;
}
static GstCaps *
gst_video_format_new_caps_raw (GstVideoFormat format)
{
g_return_val_if_fail (format != GST_VIDEO_FORMAT_UNKNOWN, NULL);
return gst_caps_new_simple ("video/x-raw",
"format", G_TYPE_STRING, gst_video_format_to_string (format), NULL);
}
/**
* gst_video_format_new_template_caps:
* @format: the #GstVideoFormat describing the raw video format
*
* Creates a new #GstCaps object based on the parameters provided.
* Size, frame rate, and pixel aspect ratio are set to the full
* range.
*
* Since: 0.10.33
*
* Returns: a new #GstCaps object, or NULL if there was an error
*/
GstCaps *
gst_video_format_new_template_caps (GstVideoFormat format)
{
GstCaps *caps;
GstStructure *structure;
g_return_val_if_fail (format != GST_VIDEO_FORMAT_UNKNOWN, NULL);
caps = gst_video_format_new_caps_raw (format);
if (caps) {
GValue value = { 0 };
GValue v = { 0 };
structure = gst_caps_get_structure (caps, 0);
gst_structure_set (structure,
"width", GST_TYPE_INT_RANGE, 1, G_MAXINT,
"height", GST_TYPE_INT_RANGE, 1, G_MAXINT,
"framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1,
"pixel-aspect-ratio", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
g_value_init (&value, GST_TYPE_LIST);
g_value_init (&v, G_TYPE_BOOLEAN);
g_value_set_boolean (&v, TRUE);
gst_value_list_append_value (&value, &v);
g_value_set_boolean (&v, FALSE);
gst_value_list_append_value (&value, &v);
gst_structure_set_value (structure, "interlaced", &value);
g_value_reset (&value);
g_value_reset (&v);
}
return caps;
}
/**
* gst_video_format_new_caps:
* @format: the #GstVideoFormat describing the raw video format
* @width: width of video
* @height: height of video
* @framerate_n: numerator of frame rate
* @framerate_d: denominator of frame rate
* @par_n: numerator of pixel aspect ratio
* @par_d: denominator of pixel aspect ratio
*
* Creates a new #GstCaps object based on the parameters provided.
*
* Since: 0.10.16
*
* Returns: a new #GstCaps object, or NULL if there was an error
*/
GstCaps *
gst_video_format_new_caps (GstVideoFormat format, int width,
int height, int framerate_n, int framerate_d, int par_n, int par_d)
{
GstCaps *caps;
GstStructure *structure;
g_return_val_if_fail (format != GST_VIDEO_FORMAT_UNKNOWN, NULL);
g_return_val_if_fail (width > 0 && height > 0, NULL);
caps = gst_video_format_new_caps_raw (format);
if (caps) {
structure = gst_caps_get_structure (caps, 0);
gst_structure_set (structure,
"width", G_TYPE_INT, width,
"height", G_TYPE_INT, height,
"framerate", GST_TYPE_FRACTION, framerate_n, framerate_d,
"pixel-aspect-ratio", GST_TYPE_FRACTION, par_n, par_d, NULL);
}
return caps;
}
static GstVideoFormat static GstVideoFormat
gst_video_format_from_rgb32_masks (int red_mask, int green_mask, int blue_mask) gst_video_format_from_rgb32_masks (int red_mask, int green_mask, int blue_mask)
{ {
@ -902,6 +539,25 @@ gst_video_format_has_alpha (GstVideoFormat format)
return (formats[format].flags & VIDEO_FLAG_ALPHA) != 0; return (formats[format].flags & VIDEO_FLAG_ALPHA) != 0;
} }
/**
* gst_video_format_get_n_components:
* @format: a #GstVideoFormat
*
* Get the number of components for @format.
*
* Returns: the number of components for @format.
*/
int
gst_video_format_get_n_components (GstVideoFormat format)
{
g_return_val_if_fail (format != GST_VIDEO_FORMAT_UNKNOWN, 0);
if (format >= G_N_ELEMENTS (formats))
return 0;
return formats[format].n_comp;
}
/** /**
* gst_video_format_get_component_depth: * gst_video_format_get_component_depth:
* @format: a #GstVideoFormat * @format: a #GstVideoFormat
@ -1052,12 +708,22 @@ void
gst_video_info_set_format (GstVideoInfo * info, GstVideoFormat format, gst_video_info_set_format (GstVideoInfo * info, GstVideoFormat format,
guint width, guint height) guint width, guint height)
{ {
gint i;
g_return_if_fail (info != NULL); g_return_if_fail (info != NULL);
g_return_if_fail (format != GST_VIDEO_FORMAT_UNKNOWN); g_return_if_fail (format != GST_VIDEO_FORMAT_UNKNOWN);
info->format = format; info->format = format;
info->width = width; info->width = width;
info->heigth = height; info->height = height;
info->n_planes = formats[format].n_planes;
info->size = get_size (format, info->width, info->height);
fill_planes (info);
for (i = 0; i < info->n_planes; i++) {
info->plane[i].stride = get_stride (format, i, info->width);
}
} }
/** /**
@ -1073,34 +739,71 @@ gboolean
gst_video_info_from_caps (GstVideoInfo * info, const GstCaps * caps) gst_video_info_from_caps (GstVideoInfo * info, const GstCaps * caps)
{ {
GstStructure *structure; GstStructure *structure;
const gchar *fmt; const gchar *s;
gboolean ok = TRUE;
GstVideoFormat format; GstVideoFormat format;
gint width, height g_return_val_if_fail (info != NULL, FALSE); gint width, height;
g_return_val_if_fail (caps != NULL, FALSE); gint fps_n, fps_d;
gboolean interlaced;
gint par_n, par_d;
if (!gst_caps_is_fixed (caps)) g_return_val_if_fail (info != NULL, FALSE);
return FALSE; g_return_val_if_fail (caps != NULL, FALSE);
g_return_val_if_fail (gst_caps_is_fixed (caps), FALSE);
structure = gst_caps_get_structure (caps, 0); structure = gst_caps_get_structure (caps, 0);
if (!gst_structure_has_name (structure, "video/x-raw")) if (!gst_structure_has_name (structure, "video/x-raw"))
goto wrong_name; goto wrong_name;
if (!(fmt = gst_structure_get_string (structure, "format"))) if (!(s = gst_structure_get_string (structure, "format")))
goto no_format; goto no_format;
format = gst_video_format_from_string (fmt); format = gst_video_format_from_string (s);
if (format == GST_VIDEO_FORMAT_UNKNOWN) if (format == GST_VIDEO_FORMAT_UNKNOWN)
goto unknown_format; goto unknown_format;
info->format = format; if (!gst_structure_get_int (structure, "width", &width))
goto no_width;
if (!gst_structure_get_int (structure, "height", &height))
goto no_height;
if (gst_structure_get_int (structure, "width", &width)) gst_video_info_set_format (info, format, width, height);
info->width = width;
if (gst_structure_get_int (structure, "height", &height))
info->height = height;
if (gst_structure_get_fraction (structure, "framerate", &fps_n, &fps_d)) {
info->fps_n = fps_n;
info->fps_d = fps_d;
} else {
info->fps_n = 0;
info->fps_d = 1;
}
if (!gst_structure_get_boolean (structure, "interlaced", &interlaced))
interlaced = FALSE;
if (interlaced)
info->flags |= GST_VIDEO_FLAG_INTERLACED;
else
info->flags &= ~GST_VIDEO_FLAG_INTERLACED;
s = gst_structure_get_string (structure, "color-matrix");
if (s)
info->color_matrix = s;
else
info->color_matrix = "sdtv";
s = gst_structure_get_string (structure, "chroma-site");
if (s)
info->chroma_site = s;
else
info->chroma_site = "mpeg2";
if (gst_structure_get_fraction (structure, "pixel-aspect-ratio",
&par_n, &par_d)) {
info->par_n = par_n;
info->par_d = par_d;
} else {
info->par_n = 1;
info->par_d = 1;
}
return TRUE; return TRUE;
/* ERROR */ /* ERROR */
@ -1116,24 +819,56 @@ unknown_format:
{ {
return FALSE; return FALSE;
} }
} no_width:
GstCaps *
gst_video_info_to_caps (GstVideoInfo * info)
{ {
return NULL; return FALSE;
} }
no_height:
gboolean
gst_video_info_convert (GstVideoInfo * info,
GstFormat src_format, gint64 src_value, GstFormat dest_format,
gint64 * dest_value)
{ {
return TRUE; return FALSE;
}
} }
/** /**
* gst_video_format_get_row_stride: * gst_video_info_to_caps:
* @info: a #GstVideoInfo
*
* Convert the values of @info into a #GstCaps.
*
* Returns: a new #GstCaps containing the info of @info.
*/
GstCaps *
gst_video_info_to_caps (GstVideoInfo * info)
{
GstCaps *caps;
const gchar *format;
g_return_val_if_fail (info != NULL, NULL);
g_return_val_if_fail (info->format != GST_VIDEO_FORMAT_UNKNOWN, NULL);
format = gst_video_format_to_string (info->format);
g_return_val_if_fail (format != NULL, NULL);
caps = gst_caps_new_simple ("video/x-raw",
"format", G_TYPE_STRING, format,
"width", G_TYPE_INT, info->width,
"height", G_TYPE_INT, info->height,
"framerate", GST_TYPE_FRACTION, info->fps_n, info->fps_d,
"pixel-aspect-ratio", GST_TYPE_FRACTION, info->par_n, info->par_d, NULL);
if (info->flags & GST_VIDEO_FLAG_INTERLACED)
gst_caps_set_simple (caps, "interlaced", G_TYPE_BOOLEAN, TRUE, NULL);
if (info->color_matrix)
gst_caps_set_simple (caps, "color-matrix", G_TYPE_STRING,
info->color_matrix, NULL);
if (info->chroma_site)
gst_caps_set_simple (caps, "chromar-site", G_TYPE_STRING, info->chroma_site,
NULL);
return caps;
}
/**
* get_stride:
* @format: a #GstVideoFormat * @format: a #GstVideoFormat
* @component: the component index * @component: the component index
* @width: the width of video * @width: the width of video
@ -1150,18 +885,13 @@ gst_video_info_convert (GstVideoInfo * info,
* *
* Returns: row stride of component @component * Returns: row stride of component @component
*/ */
int static int
gst_video_format_get_row_stride (GstVideoFormat format, int component, get_stride (GstVideoFormat format, int plane, int width)
int width)
{ {
g_return_val_if_fail (format != GST_VIDEO_FORMAT_UNKNOWN, 0);
g_return_val_if_fail (component >= 0 && component <= 3, 0);
g_return_val_if_fail (width > 0, 0);
switch (format) { switch (format) {
case GST_VIDEO_FORMAT_I420: case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_YV12: case GST_VIDEO_FORMAT_YV12:
if (component == 0) { if (plane == 0) {
return GST_ROUND_UP_4 (width); return GST_ROUND_UP_4 (width);
} else { } else {
return GST_ROUND_UP_4 (GST_ROUND_UP_2 (width) / 2); return GST_ROUND_UP_4 (GST_ROUND_UP_2 (width) / 2);
@ -1191,13 +921,13 @@ gst_video_format_get_row_stride (GstVideoFormat format, int component,
case GST_VIDEO_FORMAT_v308: case GST_VIDEO_FORMAT_v308:
return GST_ROUND_UP_4 (width * 3); return GST_ROUND_UP_4 (width * 3);
case GST_VIDEO_FORMAT_Y41B: case GST_VIDEO_FORMAT_Y41B:
if (component == 0) { if (plane == 0) {
return GST_ROUND_UP_4 (width); return GST_ROUND_UP_4 (width);
} else { } else {
return GST_ROUND_UP_16 (width) / 4; return GST_ROUND_UP_16 (width) / 4;
} }
case GST_VIDEO_FORMAT_Y42B: case GST_VIDEO_FORMAT_Y42B:
if (component == 0) { if (plane == 0) {
return GST_ROUND_UP_4 (width); return GST_ROUND_UP_4 (width);
} else { } else {
return GST_ROUND_UP_8 (width) / 2; return GST_ROUND_UP_8 (width) / 2;
@ -1221,7 +951,7 @@ gst_video_format_get_row_stride (GstVideoFormat format, int component,
case GST_VIDEO_FORMAT_UYVP: case GST_VIDEO_FORMAT_UYVP:
return GST_ROUND_UP_4 ((width * 2 * 5 + 3) / 4); return GST_ROUND_UP_4 ((width * 2 * 5 + 3) / 4);
case GST_VIDEO_FORMAT_A420: case GST_VIDEO_FORMAT_A420:
if (component == 0 || component == 3) { if (plane == 0 || plane == 3) {
return GST_ROUND_UP_4 (width); return GST_ROUND_UP_4 (width);
} else { } else {
return GST_ROUND_UP_4 (GST_ROUND_UP_2 (width) / 2); return GST_ROUND_UP_4 (GST_ROUND_UP_2 (width) / 2);
@ -1230,7 +960,7 @@ gst_video_format_get_row_stride (GstVideoFormat format, int component,
return GST_ROUND_UP_4 (width); return GST_ROUND_UP_4 (width);
case GST_VIDEO_FORMAT_YUV9: case GST_VIDEO_FORMAT_YUV9:
case GST_VIDEO_FORMAT_YVU9: case GST_VIDEO_FORMAT_YVU9:
if (component == 0) { if (plane == 0) {
return GST_ROUND_UP_4 (width); return GST_ROUND_UP_4 (width);
} else { } else {
return GST_ROUND_UP_4 (GST_ROUND_UP_4 (width) / 4); return GST_ROUND_UP_4 (GST_ROUND_UP_4 (width) / 4);
@ -1246,6 +976,7 @@ gst_video_format_get_row_stride (GstVideoFormat format, int component,
} }
} }
#if 0
/** /**
* gst_video_format_get_component_width: * gst_video_format_get_component_width:
* @format: a #GstVideoFormat * @format: a #GstVideoFormat
@ -1260,7 +991,7 @@ gst_video_format_get_row_stride (GstVideoFormat format, int component,
* *
* Returns: width of component @component * Returns: width of component @component
*/ */
int static int
gst_video_format_get_component_width (GstVideoFormat format, gst_video_format_get_component_width (GstVideoFormat format,
int component, int width) int component, int width)
{ {
@ -1331,7 +1062,9 @@ gst_video_format_get_component_width (GstVideoFormat format,
return 0; return 0;
} }
} }
#endif
#if 0
/** /**
* gst_video_format_get_component_height: * gst_video_format_get_component_height:
* @format: a #GstVideoFormat * @format: a #GstVideoFormat
@ -1417,9 +1150,11 @@ gst_video_format_get_component_height (GstVideoFormat format,
return 0; return 0;
} }
} }
#endif
#if 0
/** /**
* gst_video_format_get_component_offset: * get_component_offset:
* @format: a #GstVideoFormat * @format: a #GstVideoFormat
* @component: the component index * @component: the component index
* @width: the width of video * @width: the width of video
@ -1436,8 +1171,8 @@ gst_video_format_get_component_height (GstVideoFormat format,
* *
* Returns: offset of component @component * Returns: offset of component @component
*/ */
int static int
gst_video_format_get_component_offset (GstVideoFormat format, get_component_offset (GstVideoFormat format,
int component, int width, int height) int component, int width, int height)
{ {
g_return_val_if_fail (format != GST_VIDEO_FORMAT_UNKNOWN, 0); g_return_val_if_fail (format != GST_VIDEO_FORMAT_UNKNOWN, 0);
@ -1684,9 +1419,145 @@ gst_video_format_get_component_offset (GstVideoFormat format,
GST_WARNING ("unhandled format %d or component %d", format, component); GST_WARNING ("unhandled format %d or component %d", format, component);
return 0; return 0;
} }
#endif
/** /**
* gst_video_format_get_size: * get_plane_offset:
* @format: a #GstVideoFormat
* @plane: the plane index
* @width: the width of video
* @height: the height of video
*
* Calculates the offset (in bytes) of the first pixel of the plane
* with index @plane. For packed formats, this will typically be 0.
* For planar formats, this will be a (relatively) large offset to the
* beginning of the second or third plane planes.
* See @gst_video_format_get_row_stride for a description
* of the plane index.
*
* Since: 0.10.16
*
* Returns: offset of plane @plane
*/
static int
fill_planes (GstVideoInfo * info)
{
int width;
int height;
width = info->width;
height = info->height;
switch (info->format) {
case GST_VIDEO_FORMAT_YUY2:
case GST_VIDEO_FORMAT_YVYU:
case GST_VIDEO_FORMAT_UYVY:
case GST_VIDEO_FORMAT_AYUV:
case GST_VIDEO_FORMAT_RGBx:
case GST_VIDEO_FORMAT_RGBA:
case GST_VIDEO_FORMAT_BGRx:
case GST_VIDEO_FORMAT_BGRA:
case GST_VIDEO_FORMAT_xRGB:
case GST_VIDEO_FORMAT_ARGB:
case GST_VIDEO_FORMAT_xBGR:
case GST_VIDEO_FORMAT_ABGR:
case GST_VIDEO_FORMAT_RGB:
case GST_VIDEO_FORMAT_v308:
case GST_VIDEO_FORMAT_BGR:
case GST_VIDEO_FORMAT_v210:
case GST_VIDEO_FORMAT_r210:
case GST_VIDEO_FORMAT_v216:
case GST_VIDEO_FORMAT_GRAY8:
case GST_VIDEO_FORMAT_GRAY16_BE:
case GST_VIDEO_FORMAT_GRAY16_LE:
case GST_VIDEO_FORMAT_Y800:
case GST_VIDEO_FORMAT_Y16:
case GST_VIDEO_FORMAT_UYVP:
case GST_VIDEO_FORMAT_RGB8_PALETTED:
case GST_VIDEO_FORMAT_IYU1:
case GST_VIDEO_FORMAT_ARGB64:
case GST_VIDEO_FORMAT_AYUV64:
info->n_planes = 1;
info->plane[0].offset = 0;
break;
case GST_VIDEO_FORMAT_I420:
info->n_planes = 3;
info->plane[0].offset = 0;
info->plane[1].offset = GST_ROUND_UP_4 (width) * GST_ROUND_UP_2 (height);
info->plane[2].offset = info->plane[1].offset +
GST_ROUND_UP_4 (GST_ROUND_UP_2 (width) / 2) *
(GST_ROUND_UP_2 (height) / 2);
break;
case GST_VIDEO_FORMAT_YV12: /* same as I420, but plane 1+2 swapped */
info->n_planes = 3;
info->plane[0].offset = 0;
info->plane[2].offset = GST_ROUND_UP_4 (width) * GST_ROUND_UP_2 (height);
info->plane[1].offset = info->plane[2].offset +
GST_ROUND_UP_4 (GST_ROUND_UP_2 (width) / 2) *
(GST_ROUND_UP_2 (height) / 2);
break;
case GST_VIDEO_FORMAT_Y41B:
info->n_planes = 3;
info->plane[0].offset = 0;
info->plane[1].offset = GST_ROUND_UP_4 (width) * height;
info->plane[2].offset = (GST_ROUND_UP_4 (width) +
(GST_ROUND_UP_16 (width) / 4)) * height;
break;
case GST_VIDEO_FORMAT_Y42B:
info->n_planes = 3;
info->plane[0].offset = 0;
info->plane[1].offset = GST_ROUND_UP_4 (width) * height;
info->plane[2].offset =
(GST_ROUND_UP_4 (width) + (GST_ROUND_UP_8 (width) / 2)) * height;
break;
case GST_VIDEO_FORMAT_Y444:
info->n_planes = 3;
info->plane[0].offset = 0;
info->plane[1].offset = GST_ROUND_UP_4 (width) * height;
info->plane[2].offset = GST_ROUND_UP_4 (width) * height * 2;
break;
case GST_VIDEO_FORMAT_NV12:
case GST_VIDEO_FORMAT_NV21:
info->n_planes = 2;
info->plane[0].offset = 0;
info->plane[1].offset = GST_ROUND_UP_4 (width) * GST_ROUND_UP_2 (height);
break;
case GST_VIDEO_FORMAT_A420:
info->n_planes = 4;
info->plane[0].offset = 0;
info->plane[1].offset = GST_ROUND_UP_4 (width) * GST_ROUND_UP_2 (height);
info->plane[2].offset = info->plane[1].offset +
GST_ROUND_UP_4 (GST_ROUND_UP_2 (width) / 2) *
(GST_ROUND_UP_2 (height) / 2);
info->plane[3].offset = info->plane[2].offset +
GST_ROUND_UP_4 (GST_ROUND_UP_2 (width) / 2) *
(GST_ROUND_UP_2 (height) / 2);
break;
case GST_VIDEO_FORMAT_YUV9:
info->n_planes = 3;
info->plane[0].offset = 0;
info->plane[1].offset = GST_ROUND_UP_4 (width) * height;
info->plane[2].offset = info->plane[1].offset +
GST_ROUND_UP_4 (GST_ROUND_UP_4 (width) / 4) *
(GST_ROUND_UP_4 (height) / 4);
break;
case GST_VIDEO_FORMAT_YVU9:
info->n_planes = 3;
info->plane[0].offset = 0;
info->plane[2].offset = GST_ROUND_UP_4 (width) * height;
info->plane[1].offset = info->plane[2].offset +
GST_ROUND_UP_4 (GST_ROUND_UP_4 (width) / 4) *
(GST_ROUND_UP_4 (height) / 4);
break;
default:
break;
}
GST_WARNING ("unhandled format %d", info->format);
return 0;
}
/**
* get_size:
* @format: a #GstVideoFormat * @format: a #GstVideoFormat
* @width: the width of video * @width: the width of video
* @height: the height of video * @height: the height of video
@ -1694,12 +1565,10 @@ gst_video_format_get_component_offset (GstVideoFormat format,
* Calculates the total number of bytes in the raw video format. This * Calculates the total number of bytes in the raw video format. This
* number should be used when allocating a buffer for raw video. * number should be used when allocating a buffer for raw video.
* *
* Since: 0.10.16
*
* Returns: size (in bytes) of raw video format * Returns: size (in bytes) of raw video format
*/ */
int static int
gst_video_format_get_size (GstVideoFormat format, int width, int height) get_size (GstVideoFormat format, int width, int height)
{ {
int size; int size;
@ -1784,43 +1653,9 @@ gst_video_format_get_size (GstVideoFormat format, int width, int height)
} }
} }
/**
* gst_video_get_size_from_caps:
* @caps: a pointer to #GstCaps
* @size: a pointer to a gint that will be assigned the size (in bytes) of a video frame with the given caps
*
* Calculates the total number of bytes in the raw video format for the given
* caps. This number should be used when allocating a buffer for raw video.
*
* Since: 0.10.34
*
* Returns: %TRUE if the size could be calculated from the caps
*/
gboolean
gst_video_get_size_from_caps (const GstCaps * caps, gint * size)
{
GstVideoFormat format = 0;
gint width = 0, height = 0;
g_return_val_if_fail (gst_caps_is_fixed (caps), FALSE);
g_return_val_if_fail (size != NULL, FALSE);
if (gst_video_format_parse_caps (caps, &format, &width, &height) == FALSE) {
GST_WARNING ("Could not parse caps: %" GST_PTR_FORMAT, caps);
return FALSE;
}
*size = gst_video_format_get_size (format, width, height);
return TRUE;
}
/** /**
* gst_video_format_convert: * gst_video_format_convert:
* @format: a #GstVideoFormat * @info: a #GstVideoInfo
* @width: the width of video
* @height: the height of video
* @fps_n: frame rate numerator
* @fps_d: frame rate denominator
* @src_format: #GstFormat of the @src_value * @src_format: #GstFormat of the @src_value
* @src_value: value to convert * @src_value: value to convert
* @dest_format: #GstFormat of the @dest_value * @dest_format: #GstFormat of the @dest_value
@ -1829,25 +1664,27 @@ gst_video_get_size_from_caps (const GstCaps * caps, gint * size)
* Converts among various #GstFormat types. This function handles * Converts among various #GstFormat types. This function handles
* GST_FORMAT_BYTES, GST_FORMAT_TIME, and GST_FORMAT_DEFAULT. For * GST_FORMAT_BYTES, GST_FORMAT_TIME, and GST_FORMAT_DEFAULT. For
* raw video, GST_FORMAT_DEFAULT corresponds to video frames. This * raw video, GST_FORMAT_DEFAULT corresponds to video frames. This
* function can be to handle pad queries of the type GST_QUERY_CONVERT. * function can be used to handle pad queries of the type GST_QUERY_CONVERT.
* *
* Since: 0.10.16 * Since: 0.10.16
* *
* Returns: TRUE if the conversion was successful. * Returns: TRUE if the conversion was successful.
*/ */
gboolean gboolean
gst_video_format_convert (GstVideoFormat format, int width, int height, gst_video_info_convert (GstVideoInfo * info,
int fps_n, int fps_d,
GstFormat src_format, gint64 src_value, GstFormat src_format, gint64 src_value,
GstFormat dest_format, gint64 * dest_value) GstFormat dest_format, gint64 * dest_value)
{ {
gboolean ret = FALSE; gboolean ret = FALSE;
int size; int size, fps_n, fps_d;
g_return_val_if_fail (format != GST_VIDEO_FORMAT_UNKNOWN, 0); g_return_val_if_fail (info != NULL, 0);
g_return_val_if_fail (width > 0 && height > 0, 0); g_return_val_if_fail (info->format != GST_VIDEO_FORMAT_UNKNOWN, 0);
g_return_val_if_fail (info->size > 0, 0);
size = gst_video_format_get_size (format, width, height); size = info->size;
fps_n = info->fps_n;
fps_d = info->fps_d;
GST_DEBUG ("converting value %" G_GINT64_FORMAT " from %s to %s", GST_DEBUG ("converting value %" G_GINT64_FORMAT " from %s to %s",
src_value, gst_format_get_name (src_format), src_value, gst_format_get_name (src_format),
@ -2010,6 +1847,7 @@ gst_video_event_parse_still_frame (GstEvent * event, gboolean * in_still)
return TRUE; return TRUE;
} }
#if 0
/** /**
* gst_video_parse_caps_palette: * gst_video_parse_caps_palette:
* @caps: #GstCaps to parse * @caps: #GstCaps to parse
@ -2041,3 +1879,4 @@ gst_video_parse_caps_palette (GstCaps * caps)
return p; return p;
} }
#endif

14
gst-libs/gst/video/video.h
View file

@ -137,12 +137,12 @@ gboolean gst_video_format_is_yuv (GstVideoFormat format) G_G
gboolean gst_video_format_is_gray (GstVideoFormat format) G_GNUC_CONST; gboolean gst_video_format_is_gray (GstVideoFormat format) G_GNUC_CONST;
gboolean gst_video_format_has_alpha (GstVideoFormat format) G_GNUC_CONST; gboolean gst_video_format_has_alpha (GstVideoFormat format) G_GNUC_CONST;
int gst_video_format_get_n_components (GstVideoFormat format) G_GNUC_CONST;
int gst_video_format_get_component_depth (GstVideoFormat format, int gst_video_format_get_component_depth (GstVideoFormat format,
int component) G_GNUC_CONST; int component) G_GNUC_CONST;
int gst_video_format_get_pixel_stride (GstVideoFormat format, int gst_video_format_get_pixel_stride (GstVideoFormat format,
int component) G_GNUC_CONST; int component) G_GNUC_CONST;
typedef struct _GstVideoPlane GstVideoPlane; typedef struct _GstVideoPlane GstVideoPlane;
typedef struct _GstVideoInfo GstVideoInfo; typedef struct _GstVideoInfo GstVideoInfo;
@ -189,6 +189,16 @@ struct _GstVideoPlane {
* @format: the format of the video * @format: the format of the video
* @width: the width of the video * @width: the width of the video
* @height: the height of the video * @height: the height of the video
* @size: the 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.
* @par_n: the pixel-aspect-ratio numerator * @par_n: the pixel-aspect-ratio numerator
* @par_d: the pixel-aspect-ratio demnominator * @par_d: the pixel-aspect-ratio demnominator
* @fps_n: the framerate numerator * @fps_n: the framerate numerator
@ -300,8 +310,6 @@ gboolean gst_video_info_convert (GstVideoInfo *info,
#define GST_VIDEO_BUFFER_PROGRESSIVE GST_BUFFER_FLAG_MEDIA4 #define GST_VIDEO_BUFFER_PROGRESSIVE GST_BUFFER_FLAG_MEDIA4
/* functions */ /* functions */
const GValue * gst_video_frame_rate (GstPad * pad);
gboolean gst_video_calculate_display_ratio (guint * dar_n, gboolean gst_video_calculate_display_ratio (guint * dar_n,
guint * dar_d, guint * dar_d,
guint video_width, guint video_width,