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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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Add new GstVideFormat enum and write a bunch of helper functions based around it.
Original commit message from CVS: * docs/libs/gst-plugins-base-libs-sections.txt: * gst-libs/gst/video/video.c: * gst-libs/gst/video/video.h: Add new GstVideFormat enum and write a bunch of helper functions based around it.
This commit is contained in:
David Schleef
parent
c050cdc9d6
commit
1c3e012fc3
4 changed files with 889 additions and 0 deletions
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@ -1,3 +1,11 @@
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2007-12-17 David Schleef <ds@schleef.org>
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* docs/libs/gst-plugins-base-libs-sections.txt:
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* gst-libs/gst/video/video.c:
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* gst-libs/gst/video/video.h:
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Add new GstVideFormat enum and write a bunch of helper functions
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based around it.
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2007-12-17 Tim-Philipp Müller <tim at centricular dot net>
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* Makefile.am:
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@ -1461,9 +1461,27 @@ GST_VIDEO_RED_MASK_15_INT
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GST_VIDEO_RED_MASK_16
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GST_VIDEO_RED_MASK_16_INT
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GST_VIDEO_SIZE_RANGE
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GstVideoFormat
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gst_video_calculate_display_ratio
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gst_video_frame_rate
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gst_video_get_size
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gst_video_format_convert
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gst_video_format_new_caps
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gst_video_format_get_component_height
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gst_video_format_get_component_offset
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gst_video_format_get_component_width
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gst_video_format_get_pixel_stride
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gst_video_format_get_row_stride
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gst_video_format_get_size
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gst_video_format_has_alpha
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gst_video_format_is_rgb
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gst_video_format_is_yuv
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gst_video_format_to_fourcc
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gst_video_format_from_fourcc
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gst_video_format_parse_caps
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gst_video_format_from_rgb32_masks
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gst_video_parse_caps_framerate
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gst_video_parse_caps_pixel_aspect_ratio
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</SECTION>
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<SECTION>
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@ -1,6 +1,7 @@
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/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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* Library <2002> Ronald Bultje <rbultje@ronald.bitfreak.net>
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* Copyright (C) 2007 David A. Schleef <ds@schleef.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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@ -183,3 +184,821 @@ error_overflow:
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g_value_unset (&tmp2);
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return FALSE;
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}
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/**
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* gst_video_format_parse_caps:
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* @caps: the #GstCaps to parse
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* @format: the #GstVideoFormat of the video represented by @caps (output)
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* @width: the width of the video represented by @caps (output)
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* @height: the height of the video represented by @caps (output)
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*
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* Determines the #GstVideoFormat of @caps and places it in the location
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* pointed to by @format. Extracts the size of the video and places it
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* in the location pointed to by @width and @height. If @caps does not
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* reprsent one of the raw video formats listed in #GstVideoFormat, the
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* function will fail and return FALSE.
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*
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* Since: 0.10.16
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*
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* Returns: TRUE if @caps was parsed correctly.
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*/
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gboolean
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gst_video_format_parse_caps (GstCaps * caps, GstVideoFormat * format,
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int *width, int *height)
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{
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GstStructure *structure;
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gboolean ok = TRUE;
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if (!gst_caps_is_fixed (caps))
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return FALSE;
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structure = gst_caps_get_structure (caps, 0);
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if (format) {
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if (gst_structure_has_name (structure, "video/x-raw-yuv")) {
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guint32 fourcc;
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ok &= gst_structure_get_fourcc (structure, "format", &fourcc);
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*format = gst_video_format_from_fourcc (fourcc);
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if (*format == GST_VIDEO_FORMAT_UNKNOWN) {
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ok = FALSE;
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}
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} else if (gst_structure_has_name (structure, "video/x-raw-rgb")) {
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int depth;
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int bpp;
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int endianness;
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int red_mask;
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int green_mask;
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int blue_mask;
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ok &= gst_structure_get_int (structure, "depth", &depth);
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ok &= gst_structure_get_int (structure, "bpp", &bpp);
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ok &= gst_structure_get_int (structure, "endianness", &endianness);
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ok &= gst_structure_get_int (structure, "red_mask", &red_mask);
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ok &= gst_structure_get_int (structure, "green_mask", &green_mask);
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ok &= gst_structure_get_int (structure, "blue_mask", &blue_mask);
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if (depth != 24 || bpp != 32 || endianness != G_BIG_ENDIAN) {
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ok = FALSE;
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} else {
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*format = gst_video_format_from_rgb32_masks (red_mask, green_mask,
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blue_mask);
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if (*format == GST_VIDEO_FORMAT_UNKNOWN) {
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ok = FALSE;
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}
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}
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} else {
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ok = FALSE;
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}
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}
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if (width) {
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ok &= gst_structure_get_int (structure, "width", width);
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}
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if (height) {
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ok &= gst_structure_get_int (structure, "height", height);
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}
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return ok;
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}
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/**
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* gst_video_parse_caps_framerate:
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* @caps:
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* @fps_n: pointer to numerator of frame rate (output)
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* @fps_d: pointer to denominator of frame rate (output)
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*
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* Extracts the frame rate from @caps and places the values in the locations
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* pointed to by @fps_n and @fps_d. Returns TRUE if the values could be
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* parsed correctly, FALSE if not.
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*
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* This function can be used with #GstCaps that have any media type; it
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* is not limited to formats handled by #GstVideoFormat.
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*
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* Since: 0.10.16
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*
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* Returns: TRUE if @caps was parsed correctly.
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*/
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gboolean
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gst_video_parse_caps_framerate (GstCaps * caps, int *fps_n, int *fps_d)
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{
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GstStructure *structure;
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if (!gst_caps_is_fixed (caps))
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return FALSE;
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structure = gst_caps_get_structure (caps, 0);
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return gst_structure_get_fraction (structure, "framerate", fps_n, fps_d);
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}
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/**
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* gst_video_parse_caps_pixel_aspect_ratio:
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* @caps:
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* @par_n: pointer to numerator of pixel aspect ratio (output)
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* @par_d: pointer to denominator of pixel aspect ratio (output)
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*
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* Extracts the pixel aspect ratio from @caps and places the values in
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* the locations pointed to by @par_n and @par_d. Returns TRUE if the
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* values could be parsed correctly, FALSE if not.
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*
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* This function can be used with #GstCaps that have any media type; it
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* is not limited to formats handled by #GstVideoFormat.
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*
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* Since: 0.10.16
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*
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* Returns: TRUE if @caps was parsed correctly.
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*/
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gboolean
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gst_video_parse_caps_pixel_aspect_ratio (GstCaps * caps, int *par_n, int *par_d)
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{
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GstStructure *structure;
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if (!gst_caps_is_fixed (caps))
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return FALSE;
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structure = gst_caps_get_structure (caps, 0);
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if (!gst_structure_get_fraction (structure, "pixel-aspect-ratio",
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par_n, par_d)) {
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*par_n = 1;
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*par_d = 1;
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}
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return TRUE;
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}
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/**
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* gst_video_format_new_caps:
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* @format: the #GstVideoFormat describing the raw video format
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* @width: width of video
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* @height: height of video
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* @framerate_n: numerator of frame rate
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* @framerate_d: denominator of frame rate
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* @par_n: numerator of pixel aspect ratio
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* @par_d: denominator of pixel aspect ratio
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*
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* Creates a new #GstCaps object based on the parameters provided.
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*
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* Since: 0.10.16
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*
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* Returns: a new #GstCaps object, or NULL if there was an error
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*/
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GstCaps *
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gst_video_format_new_caps (GstVideoFormat format, int width, int height,
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int framerate_n, int framerate_d, int par_n, int par_d)
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{
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if (gst_video_format_is_yuv (format)) {
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return gst_caps_new_simple ("video/x-raw-yuv",
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"format", GST_TYPE_FOURCC, gst_video_format_to_fourcc (format),
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"width", G_TYPE_INT, width,
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"height", G_TYPE_INT, height,
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"framerate", GST_TYPE_FRACTION, framerate_n, framerate_d,
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"pixel-aspect-ratio", GST_TYPE_FRACTION, par_n, par_d, NULL);
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}
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if (gst_video_format_is_rgb (format)) {
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int red_mask;
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int blue_mask;
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int green_mask;
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red_mask =
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0xff000000U >> gst_video_format_get_component_offset (format, 0, width,
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height);
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green_mask =
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0xff000000U >> gst_video_format_get_component_offset (format, 1, width,
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height);
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blue_mask =
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0xff000000U >> gst_video_format_get_component_offset (format, 2, width,
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height);
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return gst_caps_new_simple ("video/x-raw-rgb",
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"bpp", G_TYPE_INT, 32,
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"depth", G_TYPE_INT, 24,
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"endianness", G_TYPE_INT, G_BIG_ENDIAN,
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"red_mask", G_TYPE_INT, red_mask,
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"green_mask", G_TYPE_INT, green_mask,
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"blue_mask", G_TYPE_INT, blue_mask,
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"width", G_TYPE_INT, width,
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"height", G_TYPE_INT, height,
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"framerate", GST_TYPE_FRACTION, framerate_n, framerate_d,
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"pixel-aspect-ratio", GST_TYPE_FRACTION, par_n, par_d, NULL);
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}
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return NULL;
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}
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/**
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* gst_video_format_from_fourcc:
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* @fourcc: a FOURCC value representing raw YUV video
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*
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* Converts a FOURCC value into the corresponding #GstVideoFormat.
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* If the FOURCC cannot be represented by #GstVideoFormat,
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* #GST_VIDEO_FORMAT_UNKNOWN is returned.
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*
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* Since: 0.10.16
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*
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* Returns: the #GstVideoFormat describing the FOURCC value
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*/
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GstVideoFormat
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gst_video_format_from_fourcc (guint32 fourcc)
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{
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switch (fourcc) {
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case GST_MAKE_FOURCC ('I', '4', '2', '0'):
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return GST_VIDEO_FORMAT_I420;
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case GST_MAKE_FOURCC ('Y', 'V', '1', '2'):
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return GST_VIDEO_FORMAT_YV12;
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case GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'):
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return GST_VIDEO_FORMAT_YUY2;
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case GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y'):
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return GST_VIDEO_FORMAT_UYVY;
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case GST_MAKE_FOURCC ('A', 'Y', 'U', 'V'):
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return GST_VIDEO_FORMAT_AYUV;
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default:
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return GST_VIDEO_FORMAT_UNKNOWN;
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}
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}
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/**
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* gst_video_format_to_fourcc:
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* @format: a #GstVideoFormat video format
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*
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* Converts a #GstVideoFormat value into the corresponding FOURCC. Only
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* a few YUV formats have corresponding FOURCC values. If @format has
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* no corresponding FOURCC value, 0 is returned.
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*
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* Since: 0.10.16
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*
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* Returns: the FOURCC corresponding to @format
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*/
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guint32
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gst_video_format_to_fourcc (GstVideoFormat format)
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{
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switch (format) {
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case GST_VIDEO_FORMAT_I420:
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return GST_MAKE_FOURCC ('I', '4', '2', '0');
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case GST_VIDEO_FORMAT_YV12:
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return GST_MAKE_FOURCC ('Y', 'V', '1', '2');
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case GST_VIDEO_FORMAT_YUY2:
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return GST_MAKE_FOURCC ('Y', 'U', 'Y', '2');
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case GST_VIDEO_FORMAT_UYVY:
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return GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y');
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case GST_VIDEO_FORMAT_AYUV:
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return GST_MAKE_FOURCC ('A', 'Y', 'U', 'V');
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default:
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return 0;
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}
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}
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/**
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* gst_video_format_from_rgb32_masks:
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* @red_mask: red bit mask
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* @green_mask: green bit mask
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* @blue_mask: blue bit mask
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*
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* Converts red, green, blue bit masks into the corresponding
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* #GstVideoFormat.
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*
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* Since: 0.10.16
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*
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* Returns: the #GstVideoFormat corresponding to the bit masks
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*/
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GstVideoFormat
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gst_video_format_from_rgb32_masks (int red_mask, int green_mask, int blue_mask)
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{
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if (red_mask == 0xff000000 && green_mask == 0x00ff0000 &&
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blue_mask == 0x0000ff00) {
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return GST_VIDEO_FORMAT_RGBx;
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}
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if (red_mask == 0x0000ff00 && green_mask == 0x00ff0000 &&
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blue_mask == 0xff000000) {
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return GST_VIDEO_FORMAT_BGRx;
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}
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if (red_mask == 0x00ff0000 && green_mask == 0x0000ff00 &&
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blue_mask == 0x000000ff) {
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return GST_VIDEO_FORMAT_xRGB;
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}
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if (red_mask == 0x000000ff && green_mask == 0x0000ff00 &&
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blue_mask == 0x00ff0000) {
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return GST_VIDEO_FORMAT_xBGR;
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}
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return GST_VIDEO_FORMAT_UNKNOWN;
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}
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/**
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* gst_video_format_is_rgb:
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* @format: a #GstVideoFormat
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*
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* Since: 0.10.16
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*
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* Returns: TRUE if @format represents RGB video
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*/
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gboolean
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gst_video_format_is_rgb (GstVideoFormat format)
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{
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switch (format) {
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case GST_VIDEO_FORMAT_I420:
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case GST_VIDEO_FORMAT_YV12:
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case GST_VIDEO_FORMAT_YUY2:
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case GST_VIDEO_FORMAT_UYVY:
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case GST_VIDEO_FORMAT_AYUV:
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return FALSE;
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case GST_VIDEO_FORMAT_RGBx:
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case GST_VIDEO_FORMAT_BGRx:
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case GST_VIDEO_FORMAT_xRGB:
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case GST_VIDEO_FORMAT_xBGR:
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return TRUE;
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default:
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return FALSE;
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}
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}
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/**
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* gst_video_format_is_yuv:
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* @format: a #GstVideoFormat
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*
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* Since: 0.10.16
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*
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* Returns: TRUE if @format represents YUV video
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*/
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gboolean
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gst_video_format_is_yuv (GstVideoFormat format)
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{
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switch (format) {
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case GST_VIDEO_FORMAT_I420:
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case GST_VIDEO_FORMAT_YV12:
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case GST_VIDEO_FORMAT_YUY2:
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case GST_VIDEO_FORMAT_UYVY:
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case GST_VIDEO_FORMAT_AYUV:
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return TRUE;
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case GST_VIDEO_FORMAT_RGBx:
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case GST_VIDEO_FORMAT_BGRx:
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case GST_VIDEO_FORMAT_xRGB:
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case GST_VIDEO_FORMAT_xBGR:
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return FALSE;
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default:
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return FALSE;
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}
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}
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/**
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* gst_video_format_has_alpha:
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* @format: a #GstVideoFormat
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*
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* Since: 0.10.16
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*
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* Returns: TRUE if @format has an alpha channel
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*/
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gboolean
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gst_video_format_has_alpha (GstVideoFormat format)
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{
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switch (format) {
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case GST_VIDEO_FORMAT_I420:
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case GST_VIDEO_FORMAT_YV12:
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case GST_VIDEO_FORMAT_YUY2:
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case GST_VIDEO_FORMAT_UYVY:
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return FALSE;
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case GST_VIDEO_FORMAT_AYUV:
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return TRUE;
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case GST_VIDEO_FORMAT_RGBx:
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case GST_VIDEO_FORMAT_BGRx:
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case GST_VIDEO_FORMAT_xRGB:
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case GST_VIDEO_FORMAT_xBGR:
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return FALSE;
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default:
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return FALSE;
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}
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}
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/**
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* gst_video_format_get_row_stride:
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* @format: a #GstVideoFormat
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* @component: the component index
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* @width: the width of video
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*
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* Calculates the row stride (number of bytes from one row of pixels to
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* the next) for the video component with an index of @component. For
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* YUV video, Y, U, and V have component indices of 0, 1, and 2,
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* respectively. For RGB video, R, G, and B have component indicies of
|
||||
* 0, 1, and 2, respectively. Alpha channels, if present, have a component
|
||||
* index of 3. The @width parameter always represents the width of the
|
||||
* video, not the component.
|
||||
*
|
||||
* Since: 0.10.16
|
||||
*
|
||||
* Returns: row stride of component @component
|
||||
*/
|
||||
int
|
||||
gst_video_format_get_row_stride (GstVideoFormat format, int component,
|
||||
int width)
|
||||
{
|
||||
switch (format) {
|
||||
case GST_VIDEO_FORMAT_I420:
|
||||
case GST_VIDEO_FORMAT_YV12:
|
||||
if (component == 0) {
|
||||
return GST_ROUND_UP_4 (width);
|
||||
} else {
|
||||
return GST_ROUND_UP_4 (GST_ROUND_UP_2 (width) / 2);
|
||||
}
|
||||
case GST_VIDEO_FORMAT_YUY2:
|
||||
case GST_VIDEO_FORMAT_UYVY:
|
||||
return GST_ROUND_UP_4 (width * 2);
|
||||
case GST_VIDEO_FORMAT_AYUV:
|
||||
case GST_VIDEO_FORMAT_RGBx:
|
||||
case GST_VIDEO_FORMAT_BGRx:
|
||||
case GST_VIDEO_FORMAT_xRGB:
|
||||
case GST_VIDEO_FORMAT_xBGR:
|
||||
return width * 4;
|
||||
default:
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* gst_video_format_get_pixel_stride:
|
||||
* @format: a #GstVideoFormat
|
||||
* @component: the component index
|
||||
*
|
||||
* Calculates the pixel stride (number of bytes from one pixel to the
|
||||
* pixel to its immediate left) for the video component with an index
|
||||
* of @component. See @gst_video_format_get_row_stride for a description
|
||||
* of the component index.
|
||||
*
|
||||
* Since: 0.10.16
|
||||
*
|
||||
* Returns: pixel stride of component @component
|
||||
*/
|
||||
int
|
||||
gst_video_format_get_pixel_stride (GstVideoFormat format, int component)
|
||||
{
|
||||
switch (format) {
|
||||
case GST_VIDEO_FORMAT_I420:
|
||||
case GST_VIDEO_FORMAT_YV12:
|
||||
return 1;
|
||||
case GST_VIDEO_FORMAT_YUY2:
|
||||
case GST_VIDEO_FORMAT_UYVY:
|
||||
if (component == 0) {
|
||||
return 2;
|
||||
} else {
|
||||
return 4;
|
||||
}
|
||||
case GST_VIDEO_FORMAT_AYUV:
|
||||
case GST_VIDEO_FORMAT_RGBx:
|
||||
case GST_VIDEO_FORMAT_BGRx:
|
||||
case GST_VIDEO_FORMAT_xRGB:
|
||||
case GST_VIDEO_FORMAT_xBGR:
|
||||
return 4;
|
||||
default:
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* gst_video_format_get_component_width:
|
||||
* @format: a #GstVideoFormat
|
||||
* @component: the component index
|
||||
* @width: the width of video
|
||||
*
|
||||
* Calculates the width of the component. See
|
||||
* @gst_video_format_get_row_stride for a description
|
||||
* of the component index.
|
||||
*
|
||||
* Since: 0.10.16
|
||||
*
|
||||
* Returns: width of component @component
|
||||
*/
|
||||
int
|
||||
gst_video_format_get_component_width (GstVideoFormat format, int component,
|
||||
int width)
|
||||
{
|
||||
switch (format) {
|
||||
case GST_VIDEO_FORMAT_I420:
|
||||
case GST_VIDEO_FORMAT_YV12:
|
||||
case GST_VIDEO_FORMAT_YUY2:
|
||||
case GST_VIDEO_FORMAT_UYVY:
|
||||
if (component == 0) {
|
||||
return width;
|
||||
} else {
|
||||
return GST_ROUND_UP_2 (width) / 2;
|
||||
}
|
||||
case GST_VIDEO_FORMAT_AYUV:
|
||||
case GST_VIDEO_FORMAT_RGBx:
|
||||
case GST_VIDEO_FORMAT_BGRx:
|
||||
case GST_VIDEO_FORMAT_xRGB:
|
||||
case GST_VIDEO_FORMAT_xBGR:
|
||||
return width;
|
||||
default:
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* gst_video_format_get_component_height:
|
||||
* @format: a #GstVideoFormat
|
||||
* @component: the component index
|
||||
* @height: the height of video
|
||||
*
|
||||
* Calculates the height of the component. See
|
||||
* @gst_video_format_get_row_stride for a description
|
||||
* of the component index.
|
||||
*
|
||||
* Since: 0.10.16
|
||||
*
|
||||
* Returns: height of component @component
|
||||
*/
|
||||
int
|
||||
gst_video_format_get_component_height (GstVideoFormat format, int component,
|
||||
int height)
|
||||
{
|
||||
switch (format) {
|
||||
case GST_VIDEO_FORMAT_I420:
|
||||
case GST_VIDEO_FORMAT_YV12:
|
||||
if (component == 0) {
|
||||
return height;
|
||||
} else {
|
||||
return GST_ROUND_UP_2 (height) / 2;
|
||||
}
|
||||
case GST_VIDEO_FORMAT_YUY2:
|
||||
case GST_VIDEO_FORMAT_UYVY:
|
||||
case GST_VIDEO_FORMAT_AYUV:
|
||||
case GST_VIDEO_FORMAT_RGBx:
|
||||
case GST_VIDEO_FORMAT_BGRx:
|
||||
case GST_VIDEO_FORMAT_xRGB:
|
||||
case GST_VIDEO_FORMAT_xBGR:
|
||||
return height;
|
||||
default:
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* gst_video_format_get_component_offset:
|
||||
* @format: a #GstVideoFormat
|
||||
* @component: the component index
|
||||
* @width: the width of video
|
||||
* @height: the height of video
|
||||
*
|
||||
* Calculates the offset (in bytes) of the first pixel of the component
|
||||
* with index @component. For packed formats, this will typically be a
|
||||
* small integer (0, 1, 2, 3). For planar formats, this will be a
|
||||
* (relatively) large offset to the beginning of the second or third
|
||||
* component planes. See @gst_video_format_get_row_stride for a description
|
||||
* of the component index.
|
||||
*
|
||||
* Since: 0.10.16
|
||||
*
|
||||
* Returns: offset of component @component
|
||||
*/
|
||||
int
|
||||
gst_video_format_get_component_offset (GstVideoFormat format, int component,
|
||||
int width, int height)
|
||||
{
|
||||
switch (format) {
|
||||
case GST_VIDEO_FORMAT_I420:
|
||||
case GST_VIDEO_FORMAT_YV12:
|
||||
if (component == 0) {
|
||||
return 0;
|
||||
} else {
|
||||
int offset;
|
||||
|
||||
offset = GST_ROUND_UP_4 (width) * GST_ROUND_UP_2 (height);
|
||||
if (component == 2) {
|
||||
offset += GST_ROUND_UP_4 (GST_ROUND_UP_2 (width) / 2) *
|
||||
(GST_ROUND_UP_2 (height) / 2);
|
||||
}
|
||||
return offset;
|
||||
}
|
||||
case GST_VIDEO_FORMAT_YUY2:
|
||||
if (component == 0)
|
||||
return 0;
|
||||
if (component == 1)
|
||||
return 1;
|
||||
if (component == 2)
|
||||
return 3;
|
||||
return 0;
|
||||
case GST_VIDEO_FORMAT_UYVY:
|
||||
if (component == 0)
|
||||
return 1;
|
||||
if (component == 1)
|
||||
return 0;
|
||||
if (component == 2)
|
||||
return 2;
|
||||
return 0;
|
||||
case GST_VIDEO_FORMAT_AYUV:
|
||||
if (component == 0)
|
||||
return 1;
|
||||
if (component == 1)
|
||||
return 2;
|
||||
if (component == 2)
|
||||
return 3;
|
||||
if (component == 3)
|
||||
return 0;
|
||||
return 0;
|
||||
case GST_VIDEO_FORMAT_RGBx:
|
||||
if (component == 0)
|
||||
return 0;
|
||||
if (component == 1)
|
||||
return 1;
|
||||
if (component == 2)
|
||||
return 2;
|
||||
if (component == 3)
|
||||
return 3;
|
||||
return 0;
|
||||
case GST_VIDEO_FORMAT_BGRx:
|
||||
if (component == 0)
|
||||
return 2;
|
||||
if (component == 1)
|
||||
return 1;
|
||||
if (component == 2)
|
||||
return 0;
|
||||
if (component == 3)
|
||||
return 3;
|
||||
return 0;
|
||||
case GST_VIDEO_FORMAT_xRGB:
|
||||
if (component == 0)
|
||||
return 1;
|
||||
if (component == 1)
|
||||
return 2;
|
||||
if (component == 2)
|
||||
return 3;
|
||||
if (component == 3)
|
||||
return 0;
|
||||
return 0;
|
||||
case GST_VIDEO_FORMAT_xBGR:
|
||||
if (component == 0)
|
||||
return 3;
|
||||
if (component == 1)
|
||||
return 2;
|
||||
if (component == 2)
|
||||
return 1;
|
||||
if (component == 3)
|
||||
return 0;
|
||||
return 0;
|
||||
default:
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* gst_video_format_get_size:
|
||||
* @format: a #GstVideoFormat
|
||||
* @width: the width of video
|
||||
* @height: the height of video
|
||||
*
|
||||
* Calculates the total number of bytes in the raw video format. This
|
||||
* number should be used when allocating a buffer for raw video.
|
||||
*
|
||||
* Since: 0.10.16
|
||||
*
|
||||
* Returns: size (in bytes) of raw video format
|
||||
*/
|
||||
int
|
||||
gst_video_format_get_size (GstVideoFormat format, int width, int height)
|
||||
{
|
||||
int size;
|
||||
|
||||
switch (format) {
|
||||
case GST_VIDEO_FORMAT_I420:
|
||||
case GST_VIDEO_FORMAT_YV12:
|
||||
size = GST_ROUND_UP_4 (width) * GST_ROUND_UP_2 (height);
|
||||
size += GST_ROUND_UP_4 (GST_ROUND_UP_2 (width) / 2) *
|
||||
(GST_ROUND_UP_2 (height) / 2) * 2;
|
||||
return size;
|
||||
case GST_VIDEO_FORMAT_YUY2:
|
||||
case GST_VIDEO_FORMAT_UYVY:
|
||||
return GST_ROUND_UP_4 (width * 2) * height;
|
||||
case GST_VIDEO_FORMAT_AYUV:
|
||||
case GST_VIDEO_FORMAT_RGBx:
|
||||
case GST_VIDEO_FORMAT_BGRx:
|
||||
case GST_VIDEO_FORMAT_xRGB:
|
||||
case GST_VIDEO_FORMAT_xBGR:
|
||||
return width * 4 * height;
|
||||
default:
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* gst_video_format_convert:
|
||||
* @format: a #GstVideoFormat
|
||||
* @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_value: value to convert
|
||||
* @dest_format: #GstFormat of the @dest_value
|
||||
* @dest_value: pointer to destination value
|
||||
*
|
||||
* Converts among various #GstFormat types. This function handles
|
||||
* GST_FORMAT_BYTES, GST_FORMAT_TIME, and GST_FORMAT_DEFAULT. For
|
||||
* raw video, GST_FORMAT_DEFAULT corresponds to video frames. This
|
||||
* function can be to handle pad queries of the type GST_QUERY_CONVERT.
|
||||
*
|
||||
* Since: 0.10.16
|
||||
*
|
||||
* Returns: TRUE if the conversion was successful.
|
||||
*/
|
||||
gboolean
|
||||
gst_video_format_convert (GstVideoFormat format, int width, int height,
|
||||
int fps_n, int fps_d,
|
||||
GstFormat src_format, gint64 src_value,
|
||||
GstFormat dest_format, gint64 * dest_value)
|
||||
{
|
||||
gboolean ret = FALSE;
|
||||
int size;
|
||||
|
||||
size = gst_video_format_get_size (format, width, height);
|
||||
|
||||
GST_DEBUG ("converting value %" G_GINT64_FORMAT " from %s to %s",
|
||||
src_value, gst_format_get_name (src_format),
|
||||
gst_format_get_name (dest_format));
|
||||
|
||||
if (src_format == dest_format) {
|
||||
*dest_value = src_value;
|
||||
ret = TRUE;
|
||||
goto done;
|
||||
}
|
||||
|
||||
if (src_value == -1) {
|
||||
*dest_value = -1;
|
||||
ret = TRUE;
|
||||
goto done;
|
||||
}
|
||||
|
||||
/* bytes to frames */
|
||||
if (src_format == GST_FORMAT_BYTES && dest_format == GST_FORMAT_DEFAULT) {
|
||||
if (size != 0) {
|
||||
*dest_value = gst_util_uint64_scale_int (src_value, 1, size);
|
||||
} else {
|
||||
GST_ERROR ("blocksize is 0");
|
||||
*dest_value = 0;
|
||||
}
|
||||
ret = TRUE;
|
||||
goto done;
|
||||
}
|
||||
|
||||
/* frames to bytes */
|
||||
if (src_format == GST_FORMAT_DEFAULT && dest_format == GST_FORMAT_BYTES) {
|
||||
*dest_value = gst_util_uint64_scale_int (src_value, size, 1);
|
||||
ret = TRUE;
|
||||
goto done;
|
||||
}
|
||||
|
||||
/* time to frames */
|
||||
if (src_format == GST_FORMAT_TIME && dest_format == GST_FORMAT_DEFAULT) {
|
||||
if (fps_d != 0) {
|
||||
*dest_value = gst_util_uint64_scale (src_value,
|
||||
fps_n, GST_SECOND * fps_d);
|
||||
} else {
|
||||
GST_ERROR ("framerate denominator is 0");
|
||||
*dest_value = 0;
|
||||
}
|
||||
ret = TRUE;
|
||||
goto done;
|
||||
}
|
||||
|
||||
/* frames to time */
|
||||
if (src_format == GST_FORMAT_DEFAULT && dest_format == GST_FORMAT_TIME) {
|
||||
if (fps_n != 0) {
|
||||
*dest_value = gst_util_uint64_scale (src_value,
|
||||
GST_SECOND * fps_d, fps_n);
|
||||
} else {
|
||||
GST_ERROR ("framerate numerator is 0");
|
||||
*dest_value = 0;
|
||||
}
|
||||
ret = TRUE;
|
||||
goto done;
|
||||
}
|
||||
|
||||
/* time to bytes */
|
||||
if (src_format == GST_FORMAT_TIME && dest_format == GST_FORMAT_BYTES) {
|
||||
if (fps_d != 0) {
|
||||
*dest_value = gst_util_uint64_scale (src_value,
|
||||
fps_n * size, GST_SECOND * fps_d);
|
||||
} else {
|
||||
GST_ERROR ("framerate denominator is 0");
|
||||
*dest_value = 0;
|
||||
}
|
||||
ret = TRUE;
|
||||
goto done;
|
||||
}
|
||||
|
||||
/* bytes to time */
|
||||
if (src_format == GST_FORMAT_BYTES && dest_format == GST_FORMAT_TIME) {
|
||||
if (fps_n != 0 && size != 0) {
|
||||
*dest_value = gst_util_uint64_scale (src_value,
|
||||
GST_SECOND * fps_d, fps_n * size);
|
||||
} else {
|
||||
GST_ERROR ("framerate denominator and/or blocksize is 0");
|
||||
*dest_value = 0;
|
||||
}
|
||||
ret = TRUE;
|
||||
}
|
||||
|
||||
done:
|
||||
|
||||
GST_DEBUG ("ret=%d result %" G_GINT64_FORMAT, ret, *dest_value);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -25,6 +25,19 @@
|
|||
|
||||
G_BEGIN_DECLS
|
||||
|
||||
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
|
||||
} GstVideoFormat;
|
||||
|
||||
#define GST_VIDEO_BYTE1_MASK_32 "0xFF000000"
|
||||
#define GST_VIDEO_BYTE2_MASK_32 "0x00FF0000"
|
||||
#define GST_VIDEO_BYTE3_MASK_32 "0x0000FF00"
|
||||
|
|
@ -194,6 +207,37 @@ gboolean gst_video_calculate_display_ratio (guint *dar_n, guint *dar_d,
|
|||
guint video_par_n, guint video_par_d,
|
||||
guint display_par_n, guint display_par_d);
|
||||
|
||||
gboolean gst_video_format_parse_caps (GstCaps *caps, GstVideoFormat *format,
|
||||
int *width, int *height);
|
||||
gboolean gst_video_parse_caps_framerate (GstCaps *caps,
|
||||
int *fps_n, int *fps_d);
|
||||
gboolean gst_video_parse_caps_pixel_aspect_ratio (GstCaps *caps,
|
||||
int *par_n, int *par_d);
|
||||
GstCaps * gst_video_format_new_caps (GstVideoFormat format,
|
||||
int width, int height, int framerate_n, int framerate_d,
|
||||
int par_n, int par_d);
|
||||
GstVideoFormat gst_video_format_from_fourcc (guint32 fourcc);
|
||||
guint32 gst_video_format_to_fourcc (GstVideoFormat format);
|
||||
GstVideoFormat gst_video_format_from_rgb32_masks (int red_mask, int green_mask, int blue_mask);
|
||||
gboolean gst_video_format_is_rgb (GstVideoFormat format);
|
||||
gboolean gst_video_format_is_yuv (GstVideoFormat format);
|
||||
gboolean gst_video_format_has_alpha (GstVideoFormat format);
|
||||
int gst_video_format_get_row_stride (GstVideoFormat format, int component,
|
||||
int width);
|
||||
int gst_video_format_get_pixel_stride (GstVideoFormat format, int component);
|
||||
int gst_video_format_get_component_width (GstVideoFormat format, int component,
|
||||
int width);
|
||||
int gst_video_format_get_component_height (GstVideoFormat format, int component,
|
||||
int height);
|
||||
int gst_video_format_get_component_offset (GstVideoFormat format, int component,
|
||||
int width, int height);
|
||||
int gst_video_format_get_size (GstVideoFormat format, int width, int height);
|
||||
gboolean gst_video_format_convert (GstVideoFormat format, int width, int height,
|
||||
int fps_n, int fps_d,
|
||||
GstFormat src_format, gint64 src_value,
|
||||
GstFormat dest_format, gint64 * dest_value);
|
||||
|
||||
|
||||
G_END_DECLS
|
||||
|
||||
#endif /* __GST_VIDEO_H__ */
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||||
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Reference in a new issue