自学教程：C++ GST_VIDEO_CAPS_MAKE函数代码示例

GstCaps *gst_gl_mixer_update_caps (GstGLMixer * mix, GstCaps * caps){    GstCaps *result = NULL;    GstCaps *glcaps = gst_gl_mixer_set_caps_features (caps,                      GST_CAPS_FEATURE_MEMORY_GL_MEMORY);#if GST_GL_HAVE_PLATFORM_EGL    GstCaps *eglcaps = gst_gl_mixer_set_caps_features (caps,                       GST_CAPS_FEATURE_MEMORY_EGL_IMAGE);#endif    GstCaps *uploadcaps = gst_gl_mixer_set_caps_features (caps,                          GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META);    GstCaps *raw_caps =        gst_caps_from_string (GST_VIDEO_CAPS_MAKE (GST_GL_COLOR_CONVERT_FORMATS));    result = gst_caps_new_empty ();    result = gst_caps_merge (result, glcaps);#if GST_GL_HAVE_PLATFORM_EGL    result = gst_caps_merge (result, eglcaps);#endif    result = gst_caps_merge (result, uploadcaps);    result = gst_caps_merge (result, raw_caps);    result = gst_caps_merge (result, gst_gl_mixer_caps_remove_format_info (caps));    GST_DEBUG_OBJECT (mix, "returning %" GST_PTR_FORMAT, result);    return result;}

#define orc_memset memset#else#include <orc/orcfunctions.h>#endifGST_DEBUG_CATEGORY_STATIC (gst_compositor_debug);#define GST_CAT_DEFAULT gst_compositor_debug#define FORMATS " { AYUV, BGRA, ARGB, RGBA, ABGR, Y444, Y42B, YUY2, UYVY, "/                "   YVYU, I420, YV12, NV12, NV21, Y41B, RGB, BGR, xRGB, xBGR, "/                "   RGBx, BGRx } "static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",        GST_PAD_SRC,        GST_PAD_ALWAYS,        GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (FORMATS))                                                                  );static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%u",        GST_PAD_SINK,        GST_PAD_REQUEST,        GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (FORMATS))                                                                   );#define DEFAULT_PAD_XPOS   0#define DEFAULT_PAD_YPOS   0#define DEFAULT_PAD_WIDTH  0#define DEFAULT_PAD_HEIGHT 0#define DEFAULT_PAD_ALPHA  1.0enum{

#include "gstmsdksystemmemory.h"#include "gstmsdkcontextutil.h"#include "gstmsdkvpputil.h"#ifndef _WIN32#include "gstmsdkallocator_libva.h"#endifGST_DEBUG_CATEGORY_EXTERN (gst_msdkvpp_debug);#define GST_CAT_DEFAULT gst_msdkvpp_debugstatic GstStaticPadTemplate gst_msdkvpp_sink_factory =    GST_STATIC_PAD_TEMPLATE ("sink",    GST_PAD_SINK,    GST_PAD_ALWAYS,    GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE        ("{ NV12, YV12, I420, YUY2, UYVY, BGRA, BGRx }")        ", " "interlace-mode = (string){ progressive, interleaved, mixed }" ";"        GST_VIDEO_CAPS_MAKE_WITH_FEATURES (GST_CAPS_FEATURE_MEMORY_DMABUF,            "{ NV12, BGRA, YUY2}")));static GstStaticPadTemplate gst_msdkvpp_src_factory =    GST_STATIC_PAD_TEMPLATE ("src",    GST_PAD_SRC,    GST_PAD_ALWAYS,    GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES        (GST_CAPS_FEATURE_MEMORY_DMABUF,            "{ BGRA, YUY2, NV12}") ";"        GST_VIDEO_CAPS_MAKE ("{ NV12, YUY2, BGRA, BGRx }") ", "        "interlace-mode = (string){ progressive, interleaved, mixed }" ";"));enum

#define GST_PLUGIN_NAME "vaapiencode_mpeg2"#define GST_PLUGIN_DESC "A VA-API based MPEG-2 video encoder"GST_DEBUG_CATEGORY_STATIC (gst_vaapi_mpeg2_encode_debug);#define GST_CAT_DEFAULT gst_vaapi_mpeg2_encode_debug#define GST_CODEC_CAPS                          /  "video/mpeg, mpegversion = (int) 2, "         /  "systemstream = (boolean) false"/* *INDENT-OFF* */static const char gst_vaapiencode_mpeg2_sink_caps_str[] =  GST_VAAPI_MAKE_ENC_SURFACE_CAPS ", "  GST_CAPS_INTERLACED_FALSE "; "  GST_VIDEO_CAPS_MAKE (GST_VIDEO_FORMATS_ALL) ", "  GST_CAPS_INTERLACED_FALSE;/* *INDENT-ON* *//* *INDENT-OFF* */static const char gst_vaapiencode_mpeg2_src_caps_str[] =  GST_CODEC_CAPS;/* *INDENT-ON* *//* *INDENT-OFF* */static GstStaticPadTemplate gst_vaapiencode_mpeg2_sink_factory =  GST_STATIC_PAD_TEMPLATE ("sink",      GST_PAD_SINK,      GST_PAD_ALWAYS,      GST_STATIC_CAPS (gst_vaapiencode_mpeg2_sink_caps_str));/* *INDENT-ON* */

    GstVideoCodecState * state);static GstFlowReturn gst_pngdec_parse (GstVideoDecoder * decoder,    GstVideoCodecFrame * frame, GstAdapter * adapter, gboolean at_eos);static GstFlowReturn gst_pngdec_handle_frame (GstVideoDecoder * decoder,    GstVideoCodecFrame * frame);static gboolean gst_pngdec_decide_allocation (GstVideoDecoder * decoder,    GstQuery * query);#define parent_class gst_pngdec_parent_classG_DEFINE_TYPE (GstPngDec, gst_pngdec, GST_TYPE_VIDEO_DECODER);static GstStaticPadTemplate gst_pngdec_src_pad_template =GST_STATIC_PAD_TEMPLATE ("src",    GST_PAD_SRC,    GST_PAD_ALWAYS,    GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE        ("{ RGBA, RGB, ARGB64, GRAY8, GRAY16_BE }"))    );static GstStaticPadTemplate gst_pngdec_sink_pad_template =GST_STATIC_PAD_TEMPLATE ("sink",    GST_PAD_SINK,    GST_PAD_ALWAYS,    GST_STATIC_CAPS ("image/png")    );static voidgst_pngdec_class_init (GstPngDecClass * klass){  GstElementClass *element_class = (GstElementClass *) klass;  GstVideoDecoderClass *vdec_class = (GstVideoDecoderClass *) klass;

enum{  PROP_0,  PROP_POSITION,  PROP_BORDER};#define DEFAULT_POSITION 0.0#define DEFAULT_BORDER 0.0static GstStaticPadTemplate video_sink_pad_template =GST_STATIC_PAD_TEMPLATE ("video_sink",    GST_PAD_SINK,    GST_PAD_ALWAYS,    GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ AYUV, ARGB, BGRA, ABGR, RGBA }")));static GstStaticPadTemplate mask_sink_pad_template =    GST_STATIC_PAD_TEMPLATE ("mask_sink",    GST_PAD_SINK,    GST_PAD_ALWAYS,    GST_STATIC_CAPS ("video/x-raw, "        "format = (string) GRAY8, "        "width = " GST_VIDEO_SIZE_RANGE ", "        "height = " GST_VIDEO_SIZE_RANGE ", " "framerate = 0/1 ; "        "video/x-raw, " "format = (string) " GST_VIDEO_NE (GRAY16) ", "        "width = " GST_VIDEO_SIZE_RANGE ", "        "height = " GST_VIDEO_SIZE_RANGE ", " "framerate = 0/1"));static GstStaticPadTemplate src_pad_template =GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS,

    GstBuffer ** buf);static GstCaps *gst_inter_video_src_fixate (GstBaseSrc * src, GstCaps * caps);enum{  PROP_0,  PROP_CHANNEL};/* pad templates */static GstStaticPadTemplate gst_inter_video_src_src_template =GST_STATIC_PAD_TEMPLATE ("src",    GST_PAD_SRC,    GST_PAD_ALWAYS,    GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("I420"))    );/* class initialization */G_DEFINE_TYPE (GstInterVideoSrc, gst_inter_video_src, GST_TYPE_BASE_SRC);static voidgst_inter_video_src_class_init (GstInterVideoSrcClass * klass){  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);  GstBaseSrcClass *base_src_class = GST_BASE_SRC_CLASS (klass);  GST_DEBUG_CATEGORY_INIT (gst_inter_video_src_debug_category, "intervideosrc",

static const gchar *redisplay_fragment_shader_str_gles2 =      "precision mediump float;                            /n"      "varying vec2 v_texCoord;                            /n"      "uniform sampler2D s_texture;                        /n"      "void main()                                         /n"      "{                                                   /n"      "  gl_FragColor = texture2D( s_texture, v_texCoord );/n"      "}                                                   /n";/* *INDENT-ON* */#endifstatic GstStaticPadTemplate gst_glimage_sink_template =    GST_STATIC_PAD_TEMPLATE ("sink",    GST_PAD_SINK,    GST_PAD_ALWAYS,    GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (GST_GL_UPLOAD_FORMATS) "; "        GST_VIDEO_CAPS_MAKE_WITH_FEATURES        (GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META,            GST_GL_UPLOAD_FORMATS))    );enum{  ARG_0,  ARG_DISPLAY,  PROP_CLIENT_RESHAPE_CALLBACK,  PROP_CLIENT_DRAW_CALLBACK,  PROP_CLIENT_DATA,  PROP_FORCE_ASPECT_RATIO,  PROP_PIXEL_ASPECT_RATIO,  PROP_OTHER_CONTEXT

#include <string.h>#include "gstvp8utils.h"#include "gstvp9enc.h"GST_DEBUG_CATEGORY_STATIC (gst_vp9enc_debug);#define GST_CAT_DEFAULT gst_vp9enc_debug/* FIXME: Y42B and Y444 do not work yet it seems */static GstStaticPadTemplate gst_vp9_enc_sink_template =GST_STATIC_PAD_TEMPLATE ("sink",    GST_PAD_SINK,    GST_PAD_ALWAYS,    /*GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ I420, YV12, Y42B, Y444 }")) */    GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ I420, YV12 }"))    );static GstStaticPadTemplate gst_vp9_enc_src_template =GST_STATIC_PAD_TEMPLATE ("src",    GST_PAD_SRC,    GST_PAD_ALWAYS,    GST_STATIC_CAPS ("video/x-vp9, " "profile = (string) {0, 1, 2, 3}")    );#define parent_class gst_vp9_enc_parent_classG_DEFINE_TYPE (GstVP9Enc, gst_vp9_enc, GST_TYPE_VPX_ENC);static vpx_codec_iface_t *gst_vp9_enc_get_algo (GstVPXEnc * enc);static gboolean gst_vp9_enc_enable_scaling (GstVPXEnc * enc);static void gst_vp9_enc_set_image_format (GstVPXEnc * enc, vpx_image_t * image);

#endif#include <stdlib.h>#include "gstspacescope.h"#if G_BYTE_ORDER == G_BIG_ENDIAN#define RGB_ORDER "xRGB"#else#define RGB_ORDER "BGRx"#endifstatic GstStaticPadTemplate gst_space_scope_src_template =GST_STATIC_PAD_TEMPLATE ("src",    GST_PAD_SRC,    GST_PAD_ALWAYS,    GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (RGB_ORDER))    );static GstStaticPadTemplate gst_space_scope_sink_template =GST_STATIC_PAD_TEMPLATE ("sink",    GST_PAD_SINK,    GST_PAD_ALWAYS,    GST_STATIC_CAPS ("audio/x-raw, "        "format = (string) " GST_AUDIO_NE (S16) ", "        "layout = (string) interleaved, "        "rate = (int) [ 8000, 96000 ], "        "channels = (int) 2, " "channel-mask = (bitmask) 0x3")    );GST_DEBUG_CATEGORY_STATIC (space_scope_debug);

static gboolean gst_fbdevsink_setcaps (GstBaseSink * bsink, GstCaps * caps);static void gst_fbdevsink_finalize (GObject * object);static void gst_fbdevsink_set_property (GObject * object,    guint prop_id, const GValue * value, GParamSpec * pspec);static void gst_fbdevsink_get_property (GObject * object,    guint prop_id, GValue * value, GParamSpec * pspec);static GstStateChangeReturn gst_fbdevsink_change_state (GstElement * element,    GstStateChange transition);#define VIDEO_CAPS "{ RGB, BGR, BGRx, xBGR, RGB, RGBx, xRGB, RGB15, RGB16 }"static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",    GST_PAD_SINK,    GST_PAD_ALWAYS,    GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (VIDEO_CAPS))    );#define parent_class gst_fbdevsink_parent_classG_DEFINE_TYPE (GstFBDEVSink, gst_fbdevsink, GST_TYPE_VIDEO_SINK);static voidgst_fbdevsink_init (GstFBDEVSink * fbdevsink){  /* nothing to do here yet */}#if 0static voidgst_fbdevsink_get_times (GstBaseSink * basesink, GstBuffer * buffer,    GstClockTime * start, GstClockTime * end)

    GST_CAPS_CODEC("video/x-wmv")#if USE_VP8_DECODER    GST_CAPS_CODEC("video/x-vp8")#endif#if USE_JPEG_DECODER    GST_CAPS_CODEC("image/jpeg")#endif#if USE_VP9_DECODER    GST_CAPS_CODEC("video/x-vp9")#endif    ;static const char gst_vaapidecode_src_caps_str[] =    GST_VAAPI_MAKE_SURFACE_CAPS ";"    GST_VAAPI_MAKE_GLTEXUPLOAD_CAPS ";"    GST_VIDEO_CAPS_MAKE("{ I420, YV12, NV12 }");static GstStaticPadTemplate gst_vaapidecode_sink_factory =    GST_STATIC_PAD_TEMPLATE(        "sink",        GST_PAD_SINK,        GST_PAD_ALWAYS,        GST_STATIC_CAPS(gst_vaapidecode_sink_caps_str));static GstStaticPadTemplate gst_vaapidecode_src_factory =    GST_STATIC_PAD_TEMPLATE(        "src",        GST_PAD_SRC,        GST_PAD_ALWAYS,        GST_STATIC_CAPS(gst_vaapidecode_src_caps_str));

//.........这里部分代码省略.........    qtquick2_class->update_node = gst_qt_quick2_video_sink_update_node;    /**     * GstQtQuick2VideoSink::pixel-aspect-ratio     *     * The pixel aspect ratio of the display device.     **/    g_object_class_install_property(gobject_class, PROP_PIXEL_ASPECT_RATIO,        g_param_spec_string("pixel-aspect-ratio", "Pixel aspect ratio",                            "The pixel aspect ratio of the display device",                            "1/1", static_cast<GParamFlags>(G_PARAM_READWRITE)));    /**     * GstQtQuick2VideoSink::force-aspect-ratio     *     * If set to TRUE, the sink will scale the video respecting its original aspect ratio     * and any remaining space will be filled with black.     * If set to FALSE, the sink will scale the video to fit the whole drawing area.     **/    g_object_class_install_property(gobject_class, PROP_FORCE_ASPECT_RATIO,        g_param_spec_boolean("force-aspect-ratio", "Force aspect ratio",                             "When enabled, scaling will respect original aspect ratio",                             FALSE, static_cast<GParamFlags>(G_PARAM_READWRITE)));    g_object_class_install_property(gobject_class, PROP_CONTRAST,        g_param_spec_int("contrast", "Contrast", "The contrast of the video",                         -100, 100, 0, static_cast<GParamFlags>(G_PARAM_READWRITE)));    g_object_class_install_property(gobject_class, PROP_BRIGHTNESS,        g_param_spec_int("brightness", "Brightness", "The brightness of the video",                         -100, 100, 0, static_cast<GParamFlags>(G_PARAM_READWRITE)));    g_object_class_install_property(gobject_class, PROP_HUE,        g_param_spec_int("hue", "Hue", "The hue of the video",                         -100, 100, 0, static_cast<GParamFlags>(G_PARAM_READWRITE)));    g_object_class_install_property(gobject_class, PROP_SATURATION,        g_param_spec_int("saturation", "Saturation", "The saturation of the video",                         -100, 100, 0, static_cast<GParamFlags>(G_PARAM_READWRITE)));    /**     * GstQtQuick2VideoSink::update-node     * @node: The QSGNode to update     * @x: The x coordinate of the target area rectangle     * @y: The y coordinate of the target area rectangle     * @width: The width of the target area rectangle     * @height: The height of the target area rectangle     * @returns: The updated QGSNode     *     * This is an action signal that you can call from your QQuickItem subclass     * inside its updateNode function to render the video. It takes a QSGNode*     * and the item's area rectangle as arguments. You should schedule to call     * this function to repaint the surface whenever the ::update signal is     * emited.     *     * Note that the x,y,width and height arguments are actually qreal.     * This means that on architectures like arm they will be float instead     * of double. You should cast the arguments to qreal if they are not     * already when emitting this signal.     */    s_signals[ACTION_UPDATE_NODE] =        g_signal_new("update-node", G_TYPE_FROM_CLASS(klass),            static_cast<GSignalFlags>(G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION),            G_STRUCT_OFFSET(GstQtQuick2VideoSinkClass, update_node),            NULL, NULL,            qRealIsDouble() ?              g_cclosure_user_marshal_POINTER__POINTER_DOUBLE_DOUBLE_DOUBLE_DOUBLE :              g_cclosure_user_marshal_POINTER__POINTER_FLOAT_FLOAT_FLOAT_FLOAT,            G_TYPE_POINTER, 5,            G_TYPE_POINTER, G_TYPE_QREAL, G_TYPE_QREAL, G_TYPE_QREAL, G_TYPE_QREAL);    /**     * GstQtQuick2VideoSink::update     *     * This signal is emited when the surface should be repainted. It should     * be connected to QQuickItem::update().     */    s_signals[SIGNAL_UPDATE] =        g_signal_new("update", G_TYPE_FROM_CLASS(klass),            G_SIGNAL_RUN_LAST,            0, NULL, NULL,            g_cclosure_marshal_VOID__VOID,            G_TYPE_NONE, 0);    g_type_class_add_private (klass, sizeof (GstQtQuick2VideoSinkPrivate));    static GstStaticPadTemplate sink_pad_template =        GST_STATIC_PAD_TEMPLATE("sink", GST_PAD_SINK, GST_PAD_ALWAYS,            GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (CAPS_FORMATS))        );    gst_element_class_add_pad_template(            element_class, gst_static_pad_template_get(&sink_pad_template));    gst_element_class_set_details_simple(element_class,        "QtQuick2 video sink", "Sink/Video",        "A video sink that can draw on a QQuickItem",        "George Kiagiadakis <[email
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