static GstCaps *
gst_video_test_src_src_fixate (GstBaseSrc * bsrc, GstCaps * caps)
{
GstStructure *structure;
caps = gst_caps_make_writable (caps);
structure = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_nearest_int (structure, "width", 320);
gst_structure_fixate_field_nearest_int (structure, "height", 240);
gst_structure_fixate_field_nearest_fraction (structure, "framerate", 30, 1);
if (gst_structure_has_field (structure, "pixel-aspect-ratio"))
gst_structure_fixate_field_nearest_fraction (structure,
"pixel-aspect-ratio", 1, 1);
if (gst_structure_has_field (structure, "colorimetry"))
gst_structure_fixate_field_string (structure, "colorimetry", "bt601");
if (gst_structure_has_field (structure, "chroma-site"))
gst_structure_fixate_field_string (structure, "chroma-site", "mpeg2");
if (gst_structure_has_field (structure, "interlace-mode"))
gst_structure_fixate_field_string (structure, "interlace-mode",
"progressive");
caps = GST_BASE_SRC_CLASS (parent_class)->fixate (bsrc, caps);
return caps;
}
static GstCaps *
gst_inter_video_src_fixate (GstBaseSrc * src, GstCaps * caps)
{
GstInterVideoSrc *intervideosrc = GST_INTER_VIDEO_SRC (src);
GstStructure *structure;
GST_DEBUG_OBJECT (intervideosrc, "fixate");
caps = gst_caps_make_writable (caps);
structure = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_nearest_int (structure, "width", 320);
gst_structure_fixate_field_nearest_int (structure, "height", 240);
gst_structure_fixate_field_nearest_fraction (structure, "framerate", 30, 1);
if (gst_structure_has_field (structure, "pixel-aspect-ratio"))
gst_structure_fixate_field_nearest_fraction (structure,
"pixel-aspect-ratio", 1, 1);
if (gst_structure_has_field (structure, "color-matrix"))
gst_structure_fixate_field_string (structure, "color-matrix", "sdtv");
if (gst_structure_has_field (structure, "chroma-site"))
gst_structure_fixate_field_string (structure, "chroma-site", "mpeg2");
if (gst_structure_has_field (structure, "interlaced"))
gst_structure_fixate_field_boolean (structure, "interlaced", FALSE);
return caps;
}
/* this function is a bit of a last resort */
static GstCaps *
gst_v4l2src_fixate (GstBaseSrc * basesrc, GstCaps * caps)
{
GstStructure *structure;
gint i;
GST_DEBUG_OBJECT (basesrc, "fixating caps %" GST_PTR_FORMAT, caps);
caps = gst_caps_make_writable (caps);
for (i = 0; i < gst_caps_get_size (caps); ++i) {
structure = gst_caps_get_structure (caps, i);
/* We are fixating to a reasonable 320x200 resolution
and the maximum framerate resolution for that size */
if (gst_structure_has_field (structure, "width"))
gst_structure_fixate_field_nearest_int (structure, "width", 320);
if (gst_structure_has_field (structure, "height"))
gst_structure_fixate_field_nearest_int (structure, "height", 200);
if (gst_structure_has_field (structure, "framerate"))
gst_structure_fixate_field_nearest_fraction (structure, "framerate",
G_MAXINT, 1);
if (gst_structure_has_field (structure, "format"))
gst_structure_fixate_field (structure, "format");
}
GST_DEBUG_OBJECT (basesrc, "fixated caps %" GST_PTR_FORMAT, caps);
caps = GST_BASE_SRC_CLASS (parent_class)->fixate (basesrc, caps);
return caps;
}
bool tcam_gst_fixate_caps (GstCaps* caps)
{
if (caps == nullptr
|| gst_caps_is_empty(caps)
|| gst_caps_is_any(caps))
{
return FALSE;
}
GstStructure* structure = gst_caps_get_structure(caps, 0);
if (gst_structure_has_field(structure, "width"))
{
gst_structure_fixate_field_nearest_int(structure, "width", G_MAXINT);
}
if (gst_structure_has_field(structure, "height"))
{
gst_structure_fixate_field_nearest_int(structure, "height", G_MAXINT);
}
if (gst_structure_has_field(structure, "framerate"))
{
gst_structure_fixate_field_nearest_fraction(structure, "framerate", G_MAXINT, 1);
}
return TRUE;
}
static GstCaps *
gst_dshowvideosrc_src_fixate (GstBaseSrc * bsrc, GstCaps * caps)
{
/* If there is no desired video size, set default video size to device preffered video size */
GstDshowVideoSrc *src = GST_DSHOWVIDEOSRC (bsrc);
GstStructure *structure = gst_caps_get_structure (caps, 0);
guint i = 0;
gint res = -1;
for (; i < gst_caps_get_size (src->caps) && res == -1; i++) {
GstCaps *capstmp = gst_caps_copy_nth (src->caps, i);
if (gst_caps_is_subset (caps, capstmp)) {
res = i;
}
gst_caps_unref (capstmp);
}
if (res != -1) {
GList *type_pin_mediatype = g_list_nth (src->pins_mediatypes, res);
if (type_pin_mediatype) {
GstCapturePinMediaType *pin_mediatype =
(GstCapturePinMediaType *) type_pin_mediatype->data;
gst_structure_fixate_field_nearest_int (structure, "width",
pin_mediatype->defaultWidth);
gst_structure_fixate_field_nearest_int (structure, "height",
pin_mediatype->defaultHeight);
gst_structure_fixate_field_nearest_fraction (structure, "framerate",
pin_mediatype->defaultFPS, 1);
}
}
return GST_BASE_SRC_CLASS (gst_dshowvideosrc_parent_class)->fixate (bsrc, caps);
}
static void
gst_ks_video_src_fixate (GstBaseSrc * basesrc, GstCaps * caps)
{
GstStructure *structure = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_nearest_int (structure, "width", G_MAXINT);
gst_structure_fixate_field_nearest_int (structure, "height", G_MAXINT);
gst_structure_fixate_field_nearest_fraction (structure, "framerate",
G_MAXINT, 1);
}
static void
gst_video_test_src_src_fixate (GstPad * pad, GstCaps * caps)
{
GstStructure *structure;
structure = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_nearest_int (structure, "width", 320);
gst_structure_fixate_field_nearest_int (structure, "height", 240);
gst_structure_fixate_field_nearest_fraction (structure, "framerate", 30, 1);
}
static GstCaps *
gst_video_rate_fixate_caps (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps, GstCaps * othercaps)
{
GstStructure *s;
gint num, denom;
const GValue *par;
s = gst_caps_get_structure (caps, 0);
if (G_UNLIKELY (!gst_structure_get_fraction (s, "framerate", &num, &denom)))
return othercaps;
othercaps = gst_caps_truncate (othercaps);
othercaps = gst_caps_make_writable (othercaps);
s = gst_caps_get_structure (othercaps, 0);
gst_structure_fixate_field_nearest_fraction (s, "framerate", num, denom);
if ((par = gst_structure_get_value (s, "pixel-aspect-ratio")))
gst_structure_fixate_field_nearest_fraction (s, "pixel-aspect-ratio", 1, 1);
return othercaps;
}
static void
gst_video_rate_fixate_caps (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps, GstCaps * othercaps)
{
GstStructure *s;
gint num, denom;
s = gst_caps_get_structure (caps, 0);
if (G_UNLIKELY (!gst_structure_get_fraction (s, "framerate", &num, &denom)))
return;
s = gst_caps_get_structure (othercaps, 0);
gst_structure_fixate_field_nearest_fraction (s, "framerate", num, denom);
}
static gboolean
gst_vis_src_negotiate (GstVisual * visual)
{
GstCaps *othercaps, *target, *intersect;
GstStructure *structure;
GstCaps *caps;
caps = gst_pad_get_caps (visual->srcpad);
/* see what the peer can do */
othercaps = gst_pad_peer_get_caps (visual->srcpad);
if (othercaps) {
intersect = gst_caps_intersect (othercaps, caps);
gst_caps_unref (othercaps);
gst_caps_unref (caps);
if (gst_caps_is_empty (intersect))
goto no_format;
target = gst_caps_copy_nth (intersect, 0);
gst_caps_unref (intersect);
} else {
/* need a copy, we'll be modifying it when fixating */
target = gst_caps_copy (caps);
gst_caps_unref (caps);
}
/* fixate in case something is not fixed. This does nothing if the value is
* already fixed. For video we always try to fixate to something like
* 320x240x30 by convention. */
structure = gst_caps_get_structure (target, 0);
gst_structure_fixate_field_nearest_int (structure, "width", 320);
gst_structure_fixate_field_nearest_int (structure, "height", 240);
gst_structure_fixate_field_nearest_fraction (structure, "framerate", 30, 1);
gst_pad_set_caps (visual->srcpad, target);
gst_caps_unref (target);
return TRUE;
/* ERRORS */
no_format:
{
GST_ELEMENT_ERROR (visual, STREAM, FORMAT, (NULL),
("could not negotiate output format"));
gst_caps_unref (intersect);
return FALSE;
}
}
/* this function is a bit of a last resort */
static void
gst_v4lsrc_fixate (GstBaseSrc * bsrc, GstCaps * caps)
{
GstStructure *structure;
int i;
int targetwidth, targetheight;
GstV4lSrc *v4lsrc = GST_V4LSRC (bsrc);
struct video_capability *vcap = &GST_V4LELEMENT (v4lsrc)->vcap;
struct video_window *vwin = &GST_V4LELEMENT (v4lsrc)->vwin;
if (GST_V4L_IS_OPEN (GST_V4LELEMENT (v4lsrc))) {
GST_DEBUG_OBJECT (v4lsrc, "device reported w: %d-%d, h: %d-%d",
vcap->minwidth, vcap->maxwidth, vcap->minheight, vcap->maxheight);
targetwidth = vcap->minwidth;
targetheight = vcap->minheight;
/* if we can get the current vwin settings, we use those to fixate */
if (!gst_v4l_get_capabilities (GST_V4LELEMENT (v4lsrc)))
GST_DEBUG_OBJECT (v4lsrc, "failed getting capabilities");
else {
targetwidth = vwin->width;
targetheight = vwin->height;
}
} else {
GST_DEBUG_OBJECT (v4lsrc, "device closed, guessing");
targetwidth = 320;
targetheight = 200;
}
GST_DEBUG_OBJECT (v4lsrc, "targetting %dx%d", targetwidth, targetheight);
for (i = 0; i < gst_caps_get_size (caps); ++i) {
const GValue *v;
structure = gst_caps_get_structure (caps, i);
gst_structure_fixate_field_nearest_int (structure, "width", targetwidth);
gst_structure_fixate_field_nearest_int (structure, "height", targetheight);
gst_structure_fixate_field_nearest_fraction (structure, "framerate", 15, 2);
v = gst_structure_get_value (structure, "format");
if (v && G_VALUE_TYPE (v) != GST_TYPE_FOURCC) {
guint32 fourcc;
g_return_if_fail (G_VALUE_TYPE (v) == GST_TYPE_LIST);
fourcc = gst_value_get_fourcc (gst_value_list_get_value (v, 0));
gst_structure_set (structure, "format", GST_TYPE_FOURCC, fourcc, NULL);
}
}
}
static GstCaps *
gst_aasink_fixate (GstBaseSink * bsink, GstCaps * caps)
{
GstStructure *structure;
caps = gst_caps_make_writable (caps);
structure = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_nearest_int (structure, "width", 320);
gst_structure_fixate_field_nearest_int (structure, "height", 240);
gst_structure_fixate_field_nearest_fraction (structure, "framerate", 30, 1);
caps = GST_BASE_SINK_CLASS (parent_class)->fixate (bsink, caps);
return caps;
}
static void
fixate_vis_caps (RBVisualizerPlugin *plugin)
{
GstPad *pad;
GstCaps *caps = NULL;
const GstCaps *template_caps;
pad = gst_element_get_static_pad (plugin->vis_plugin, "src");
template_caps = gst_pad_get_pad_template_caps (pad);
gst_object_unref (pad);
if (template_caps == NULL) {
rb_debug ("vis element has no template caps?");
return;
}
caps = gst_caps_copy (template_caps);
if (gst_caps_is_fixed (caps) == FALSE) {
guint i;
char *dbg;
const VisualizerQuality *q = &rb_visualizer_quality[g_settings_get_enum (plugin->settings, "quality")];
rb_debug ("fixating caps towards %dx%d, %d/%d", q->width, q->height, q->fps_n, q->fps_d);
caps = gst_caps_make_writable (caps);
for (i = 0; i < gst_caps_get_size (caps); i++) {
GstStructure *s = gst_caps_get_structure (caps, i);
gst_structure_fixate_field_nearest_int (s, "width", q->width);
gst_structure_fixate_field_nearest_int (s, "height", q->height);
gst_structure_fixate_field_nearest_fraction (s, "framerate", q->fps_n, q->fps_d);
}
dbg = gst_caps_to_string (caps);
rb_debug ("setting fixed caps on capsfilter: %s", dbg);
g_free (dbg);
g_object_set (plugin->capsfilter, "caps", caps, NULL);
} else {
char *dbg = gst_caps_to_string (caps);
rb_debug ("vis element caps already fixed: %s", dbg);
g_free (dbg);
}
gst_caps_unref (caps);
}
static GstCaps *
gst_gdiscreencapsrc_fixate (GstBaseSrc * bsrc, GstCaps * caps)
{
GstStructure *structure;
caps = gst_caps_make_writable (caps);
structure = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_nearest_int (structure, "width", 640);
gst_structure_fixate_field_nearest_int (structure, "height", 480);
gst_structure_fixate_field_nearest_fraction (structure, "framerate", 30, 1);
caps = GST_BASE_SRC_CLASS (parent_class)->fixate (bsrc, caps);
return caps;
}
static void
gst_droid_cam_src_vfsrc_fixatecaps (GstPad * pad, GstCaps * caps)
{
GstDroidCamSrc *src = GST_DROID_CAM_SRC (GST_OBJECT_PARENT (pad));
GstStructure *s;
GST_LOG_OBJECT (src, "fixatecaps %" GST_PTR_FORMAT, caps);
gst_caps_truncate (caps);
s = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_nearest_int (s, "width", DEFAULT_VF_WIDTH);
gst_structure_fixate_field_nearest_int (s, "height", DEFAULT_VF_HEIGHT);
gst_structure_fixate_field_nearest_fraction (s, "framerate", DEFAULT_FPS, 1);
GST_DEBUG_OBJECT (src, "caps now is %" GST_PTR_FORMAT, caps);
}
static GstCaps *
gst_ks_video_src_fixate (GstBaseSrc * basesrc, GstCaps * caps)
{
GstStructure *structure;
GstCaps *fixated_caps;
gint i;
fixated_caps = gst_caps_make_writable (caps);
for (i = 0; i < gst_caps_get_size (fixated_caps); ++i) {
structure = gst_caps_get_structure (fixated_caps, i);
gst_structure_fixate_field_nearest_int (structure, "width", G_MAXINT);
gst_structure_fixate_field_nearest_int (structure, "height", G_MAXINT);
gst_structure_fixate_field_nearest_fraction (structure, "framerate",
G_MAXINT, 1);
}
return gst_caps_fixate (fixated_caps);
}
static void
gst_dc1394_src_fixate (GstPad * pad, GstCaps * caps)
{
GstDc1394 *src = GST_DC1394 (gst_pad_get_parent (pad));
GstStructure *structure;
int i;
GST_LOG_OBJECT (src, " fixating caps to closest to 320x240 , 30 fps");
for (i = 0; i < gst_caps_get_size (caps); ++i) {
structure = gst_caps_get_structure (caps, i);
gst_structure_fixate_field_nearest_int (structure, "width", 320);
gst_structure_fixate_field_nearest_int (structure, "height", 240);
gst_structure_fixate_field_nearest_fraction (structure, "framerate", 30, 1);
}
gst_object_unref (GST_OBJECT (src));
}
static gboolean
gst_goom_src_negotiate (GstGoom * goom)
{
GstCaps *othercaps, *target;
GstStructure *structure;
const GstCaps *templ;
templ = gst_pad_get_pad_template_caps (goom->srcpad);
GST_DEBUG_OBJECT (goom, "performing negotiation");
/* see what the peer can do */
othercaps = gst_pad_peer_get_caps (goom->srcpad);
if (othercaps) {
target = gst_caps_intersect (othercaps, templ);
gst_caps_unref (othercaps);
if (gst_caps_is_empty (target))
goto no_format;
gst_caps_truncate (target);
} else {
target = gst_caps_ref ((GstCaps *) templ);
}
structure = gst_caps_get_structure (target, 0);
gst_structure_fixate_field_nearest_int (structure, "width", DEFAULT_WIDTH);
gst_structure_fixate_field_nearest_int (structure, "height", DEFAULT_HEIGHT);
gst_structure_fixate_field_nearest_fraction (structure, "framerate",
DEFAULT_FPS_N, DEFAULT_FPS_D);
gst_pad_set_caps (goom->srcpad, target);
gst_caps_unref (target);
return TRUE;
no_format:
{
gst_caps_unref (target);
return FALSE;
}
}
static gboolean
gst_monoscope_src_negotiate (GstMonoscope * monoscope)
{
GstCaps *othercaps, *target, *intersect;
GstStructure *structure;
const GstCaps *templ;
templ = gst_pad_get_pad_template_caps (monoscope->srcpad);
GST_DEBUG_OBJECT (monoscope, "performing negotiation");
/* see what the peer can do */
othercaps = gst_pad_peer_get_caps (monoscope->srcpad);
if (othercaps) {
intersect = gst_caps_intersect (othercaps, templ);
gst_caps_unref (othercaps);
if (gst_caps_is_empty (intersect))
goto no_format;
target = gst_caps_copy_nth (intersect, 0);
gst_caps_unref (intersect);
} else {
target = gst_caps_ref ((GstCaps *) templ);
}
structure = gst_caps_get_structure (target, 0);
gst_structure_fixate_field_nearest_int (structure, "width", 320);
gst_structure_fixate_field_nearest_int (structure, "height", 240);
gst_structure_fixate_field_nearest_fraction (structure, "framerate", 25, 1);
gst_pad_set_caps (monoscope->srcpad, target);
gst_caps_unref (target);
return TRUE;
no_format:
{
gst_caps_unref (intersect);
return FALSE;
}
}
static GstCaps *
gst_rpi_cam_src_fixate (GstBaseSrc * basesrc, GstCaps * caps)
{
GstStructure *structure;
gint i;
GST_DEBUG_OBJECT (basesrc, "fixating caps %" GST_PTR_FORMAT, caps);
caps = gst_caps_make_writable (caps);
for (i = 0; i < gst_caps_get_size (caps); ++i) {
structure = gst_caps_get_structure (caps, i);
/* Fixate to 1920x1080 resolution if possible */
gst_structure_fixate_field_nearest_int (structure, "width", 1920);
gst_structure_fixate_field_nearest_int (structure, "height", 1080);
gst_structure_fixate_field_nearest_fraction (structure, "framerate", 30, 1);
gst_structure_fixate_field (structure, "format");
}
GST_DEBUG_OBJECT (basesrc, "fixated caps %" GST_PTR_FORMAT, caps);
caps = GST_BASE_SRC_CLASS (parent_class)->fixate (basesrc, caps);
return caps;
}
static GstCaps *
fs_videoanyrate_fixate_caps (GstBaseTransform * base,
GstPadDirection direction, GstCaps * caps, GstCaps * othercaps)
{
GstStructure *ins, *outs;
const GValue *from_fr, *to_fr;
g_return_val_if_fail (gst_caps_is_fixed (caps), othercaps);
othercaps = gst_caps_make_writable (othercaps);
GST_DEBUG_OBJECT (base, "trying to fixate othercaps %" GST_PTR_FORMAT
" based on caps %" GST_PTR_FORMAT, othercaps, caps);
ins = gst_caps_get_structure (caps, 0);
outs = gst_caps_get_structure (othercaps, 0);
from_fr = gst_structure_get_value (ins, "framerate");
to_fr = gst_structure_get_value (outs, "framerate");
/* we have both PAR but they might not be fixated */
if (from_fr && to_fr && !gst_value_is_fixed (to_fr)) {
gint from_fr_n, from_fr_d;
/* from_fr should be fixed */
g_return_val_if_fail (gst_value_is_fixed (from_fr), othercaps);
from_fr_n = gst_value_get_fraction_numerator (from_fr);
from_fr_d = gst_value_get_fraction_denominator (from_fr);
GST_DEBUG_OBJECT (base, "fixating to_fr nearest to %d/%d",
from_fr_n, from_fr_d);
gst_structure_fixate_field_nearest_fraction (outs, "framerate",
from_fr_n, from_fr_d);
}
return gst_caps_fixate (othercaps);
}
static GstCaps *
gst_aravis_fixate_caps (GstBaseSrc * bsrc, GstCaps * caps)
{
GstAravis *gst_aravis = GST_ARAVIS (bsrc);
GstStructure *structure;
gint width;
gint height;
double frame_rate;
arv_camera_get_region (gst_aravis->camera, NULL, NULL, &width, &height);
frame_rate = arv_camera_get_frame_rate (gst_aravis->camera);
structure = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_nearest_int (structure, "width", width);
gst_structure_fixate_field_nearest_int (structure, "height", height);
gst_structure_fixate_field_nearest_fraction (structure, "framerate", (double) (0.5 + frame_rate), 1);
GST_LOG_OBJECT (gst_aravis, "Fixate caps");
return GST_BASE_SRC_CLASS(gst_aravis_parent_class)->fixate(bsrc, caps);
}
static void
gst_aravis_fixate_caps (GstPad * pad, GstCaps * caps)
{
GstAravis *gst_aravis = GST_ARAVIS (gst_pad_get_parent_element (pad));
GstStructure *structure;
gint width;
gint height;
double frame_rate;
arv_camera_get_region (gst_aravis->camera, NULL, NULL, &width, &height);
frame_rate = arv_camera_get_frame_rate (gst_aravis->camera);
structure = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_nearest_int (structure, "width", width);
gst_structure_fixate_field_nearest_int (structure, "height", height);
gst_structure_fixate_field_nearest_fraction (structure, "framerate", (double) (0.5 + frame_rate), 1);
GST_LOG_OBJECT (gst_aravis, "Fixate caps");
g_object_unref (gst_aravis);
}
/* this function is a bit of a last resort */
static void
gst_v4l2src_fixate (GstBaseSrc * basesrc, GstCaps * caps)
{
GstStructure *structure;
gint i;
GST_DEBUG_OBJECT (basesrc, "fixating caps %" GST_PTR_FORMAT, caps);
for (i = 0; i < gst_caps_get_size (caps); ++i) {
const GValue *v;
structure = gst_caps_get_structure (caps, i);
/* FIXME such sizes? we usually fixate to something in the 320x200
* range... */
/* We are fixating to greater possble size (limited to GST_V4L2_MAX_SIZE)
and the maximum framerate resolution for that size */
gst_structure_fixate_field_nearest_int (structure, "width",
GST_V4L2_MAX_SIZE);
gst_structure_fixate_field_nearest_int (structure, "height",
GST_V4L2_MAX_SIZE);
gst_structure_fixate_field_nearest_fraction (structure, "framerate",
G_MAXINT, 1);
v = gst_structure_get_value (structure, "format");
if (v && G_VALUE_TYPE (v) != GST_TYPE_FOURCC) {
guint32 fourcc;
g_return_if_fail (G_VALUE_TYPE (v) == GST_TYPE_LIST);
fourcc = gst_value_get_fourcc (gst_value_list_get_value (v, 0));
gst_structure_set (structure, "format", GST_TYPE_FOURCC, fourcc, NULL);
}
}
GST_DEBUG_OBJECT (basesrc, "fixated caps %" GST_PTR_FORMAT, caps);
}
static gboolean
gst_video_rate_setcaps (GstPad * pad, GstCaps * caps)
{
GstVideoRate *videorate;
GstStructure *structure;
gboolean ret = TRUE;
GstPad *otherpad, *opeer;
gint rate_numerator, rate_denominator;
videorate = GST_VIDEO_RATE (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (pad, "setcaps called %" GST_PTR_FORMAT, caps);
structure = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_fraction (structure, "framerate",
&rate_numerator, &rate_denominator))
goto no_framerate;
if (pad == videorate->srcpad) {
/* out_frame_count is scaled by the frame rate caps when calculating next_ts.
* when the frame rate caps change, we must update base_ts and reset
* out_frame_count */
if (videorate->to_rate_numerator) {
videorate->base_ts +=
gst_util_uint64_scale (videorate->out_frame_count,
videorate->to_rate_denominator * GST_SECOND,
videorate->to_rate_numerator);
}
videorate->out_frame_count = 0;
videorate->to_rate_numerator = rate_numerator;
videorate->to_rate_denominator = rate_denominator;
otherpad = videorate->sinkpad;
} else {
videorate->from_rate_numerator = rate_numerator;
videorate->from_rate_denominator = rate_denominator;
otherpad = videorate->srcpad;
}
/* now try to find something for the peer */
opeer = gst_pad_get_peer (otherpad);
if (opeer) {
if (gst_pad_accept_caps (opeer, caps)) {
/* the peer accepts the caps as they are */
gst_pad_set_caps (otherpad, caps);
ret = TRUE;
} else {
GstCaps *peercaps;
GstCaps *transform = NULL;
ret = FALSE;
/* see how we can transform the input caps */
if (!gst_video_rate_transformcaps (pad, caps, otherpad, &transform))
goto no_transform;
/* see what the peer can do */
peercaps = gst_pad_get_caps (opeer);
GST_DEBUG_OBJECT (opeer, "icaps %" GST_PTR_FORMAT, peercaps);
GST_DEBUG_OBJECT (videorate, "transform %" GST_PTR_FORMAT, transform);
/* filter against our possibilities */
caps = gst_caps_intersect (peercaps, transform);
gst_caps_unref (peercaps);
gst_caps_unref (transform);
GST_DEBUG_OBJECT (videorate, "intersect %" GST_PTR_FORMAT, caps);
/* could turn up empty, due to e.g. colorspace etc */
if (gst_caps_get_size (caps) == 0) {
gst_caps_unref (caps);
goto no_transform;
}
/* take first possibility */
gst_caps_truncate (caps);
structure = gst_caps_get_structure (caps, 0);
/* and fixate */
gst_structure_fixate_field_nearest_fraction (structure, "framerate",
rate_numerator, rate_denominator);
gst_structure_get_fraction (structure, "framerate",
&rate_numerator, &rate_denominator);
if (otherpad == videorate->srcpad) {
videorate->to_rate_numerator = rate_numerator;
videorate->to_rate_denominator = rate_denominator;
} else {
videorate->from_rate_numerator = rate_numerator;
videorate->from_rate_denominator = rate_denominator;
}
if (gst_structure_has_field (structure, "interlaced"))
gst_structure_fixate_field_boolean (structure, "interlaced", FALSE);
if (gst_structure_has_field (structure, "color-matrix"))
gst_structure_fixate_field_string (structure, "color-matrix", "sdtv");
if (gst_structure_has_field (structure, "chroma-site"))
gst_structure_fixate_field_string (structure, "chroma-site", "mpeg2");
if (gst_structure_has_field (structure, "pixel-aspect-ratio"))
gst_structure_fixate_field_nearest_fraction (structure,
"pixel-aspect-ratio", 1, 1);
gst_pad_set_caps (otherpad, caps);
gst_caps_unref (caps);
ret = TRUE;
}
gst_object_unref (opeer);
}
done:
/* After a setcaps, our caps may have changed. In that case, we can't use
* the old buffer, if there was one (it might have different dimensions) */
GST_DEBUG_OBJECT (videorate, "swapping old buffers");
gst_video_rate_swap_prev (videorate, NULL, GST_CLOCK_TIME_NONE);
gst_object_unref (videorate);
return ret;
no_framerate:
{
GST_DEBUG_OBJECT (videorate, "no framerate specified");
goto done;
}
no_transform:
{
GST_DEBUG_OBJECT (videorate, "no framerate transform possible");
ret = FALSE;
goto done;
}
}
static GstCaps *
gst_video_scale_fixate_caps (GstBaseTransform * base, GstPadDirection direction,
GstCaps * caps, GstCaps * othercaps)
{
GstStructure *ins, *outs;
const GValue *from_par, *to_par;
GValue fpar = { 0, }, tpar = {
0,
};
othercaps = gst_caps_truncate (othercaps);
othercaps = gst_caps_make_writable (othercaps);
GST_DEBUG_OBJECT (base, "trying to fixate othercaps %" GST_PTR_FORMAT
" based on caps %" GST_PTR_FORMAT, othercaps, caps);
ins = gst_caps_get_structure (caps, 0);
outs = gst_caps_get_structure (othercaps, 0);
from_par = gst_structure_get_value (ins, "pixel-aspect-ratio");
to_par = gst_structure_get_value (outs, "pixel-aspect-ratio");
/* If we're fixating from the sinkpad we always set the PAR and
* assume that missing PAR on the sinkpad means 1/1 and
* missing PAR on the srcpad means undefined
*/
if (direction == GST_PAD_SINK) {
if (!from_par) {
g_value_init (&fpar, GST_TYPE_FRACTION);
gst_value_set_fraction (&fpar, 1, 1);
from_par = &fpar;
}
if (!to_par) {
g_value_init (&tpar, GST_TYPE_FRACTION_RANGE);
gst_value_set_fraction_range_full (&tpar, 1, G_MAXINT, G_MAXINT, 1);
to_par = &tpar;
}
} else {
if (!to_par) {
g_value_init (&tpar, GST_TYPE_FRACTION);
gst_value_set_fraction (&tpar, 1, 1);
to_par = &tpar;
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION, 1, 1,
NULL);
}
if (!from_par) {
g_value_init (&fpar, GST_TYPE_FRACTION);
gst_value_set_fraction (&fpar, 1, 1);
from_par = &fpar;
}
}
/* we have both PAR but they might not be fixated */
{
gint from_w, from_h, from_par_n, from_par_d, to_par_n, to_par_d;
gint w = 0, h = 0;
gint from_dar_n, from_dar_d;
gint num, den;
/* from_par should be fixed */
g_return_val_if_fail (gst_value_is_fixed (from_par), othercaps);
from_par_n = gst_value_get_fraction_numerator (from_par);
from_par_d = gst_value_get_fraction_denominator (from_par);
gst_structure_get_int (ins, "width", &from_w);
gst_structure_get_int (ins, "height", &from_h);
gst_structure_get_int (outs, "width", &w);
gst_structure_get_int (outs, "height", &h);
/* if both width and height are already fixed, we can't do anything
* about it anymore */
if (w && h) {
guint n, d;
GST_DEBUG_OBJECT (base, "dimensions already set to %dx%d, not fixating",
w, h);
if (!gst_value_is_fixed (to_par)) {
if (gst_video_calculate_display_ratio (&n, &d, from_w, from_h,
from_par_n, from_par_d, w, h)) {
GST_DEBUG_OBJECT (base, "fixating to_par to %dx%d", n, d);
if (gst_structure_has_field (outs, "pixel-aspect-ratio"))
gst_structure_fixate_field_nearest_fraction (outs,
"pixel-aspect-ratio", n, d);
else if (n != d)
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION,
n, d, NULL);
}
}
goto done;
}
/* Calculate input DAR */
if (!gst_util_fraction_multiply (from_w, from_h, from_par_n, from_par_d,
&from_dar_n, &from_dar_d)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
goto done;
}
GST_DEBUG_OBJECT (base, "Input DAR is %d/%d", from_dar_n, from_dar_d);
/* If either width or height are fixed there's not much we
* can do either except choosing a height or width and PAR
* that matches the DAR as good as possible
*/
if (h) {
GstStructure *tmp;
gint set_w, set_par_n, set_par_d;
GST_DEBUG_OBJECT (base, "height is fixed (%d)", h);
/* If the PAR is fixed too, there's not much to do
* except choosing the width that is nearest to the
* width with the same DAR */
if (gst_value_is_fixed (to_par)) {
to_par_n = gst_value_get_fraction_numerator (to_par);
to_par_d = gst_value_get_fraction_denominator (to_par);
GST_DEBUG_OBJECT (base, "PAR is fixed %d/%d", to_par_n, to_par_d);
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, to_par_d,
to_par_n, &num, &den)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
goto done;
}
w = (guint) gst_util_uint64_scale_int (h, num, den);
gst_structure_fixate_field_nearest_int (outs, "width", w);
goto done;
}
/* The PAR is not fixed and it's quite likely that we can set
* an arbitrary PAR. */
/* Check if we can keep the input width */
tmp = gst_structure_copy (outs);
gst_structure_fixate_field_nearest_int (tmp, "width", from_w);
gst_structure_get_int (tmp, "width", &set_w);
/* Might have failed but try to keep the DAR nonetheless by
* adjusting the PAR */
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, h, set_w,
&to_par_n, &to_par_d)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
gst_structure_free (tmp);
goto done;
}
if (!gst_structure_has_field (tmp, "pixel-aspect-ratio"))
gst_structure_set_value (tmp, "pixel-aspect-ratio", to_par);
gst_structure_fixate_field_nearest_fraction (tmp, "pixel-aspect-ratio",
to_par_n, to_par_d);
gst_structure_get_fraction (tmp, "pixel-aspect-ratio", &set_par_n,
&set_par_d);
gst_structure_free (tmp);
/* Check if the adjusted PAR is accepted */
if (set_par_n == to_par_n && set_par_d == to_par_d) {
if (gst_structure_has_field (outs, "pixel-aspect-ratio") ||
set_par_n != set_par_d)
gst_structure_set (outs, "width", G_TYPE_INT, set_w,
"pixel-aspect-ratio", GST_TYPE_FRACTION, set_par_n, set_par_d,
NULL);
goto done;
}
/* Otherwise scale the width to the new PAR and check if the
* adjusted with is accepted. If all that fails we can't keep
* the DAR */
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_par_d,
set_par_n, &num, &den)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
goto done;
}
w = (guint) gst_util_uint64_scale_int (h, num, den);
gst_structure_fixate_field_nearest_int (outs, "width", w);
if (gst_structure_has_field (outs, "pixel-aspect-ratio") ||
set_par_n != set_par_d)
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION,
set_par_n, set_par_d, NULL);
goto done;
} else if (w) {
GstStructure *tmp;
gint set_h, set_par_n, set_par_d;
GST_DEBUG_OBJECT (base, "width is fixed (%d)", w);
/* If the PAR is fixed too, there's not much to do
* except choosing the height that is nearest to the
* height with the same DAR */
if (gst_value_is_fixed (to_par)) {
to_par_n = gst_value_get_fraction_numerator (to_par);
to_par_d = gst_value_get_fraction_denominator (to_par);
GST_DEBUG_OBJECT (base, "PAR is fixed %d/%d", to_par_n, to_par_d);
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, to_par_d,
to_par_n, &num, &den)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
goto done;
}
h = (guint) gst_util_uint64_scale_int (w, den, num);
gst_structure_fixate_field_nearest_int (outs, "height", h);
goto done;
}
/* The PAR is not fixed and it's quite likely that we can set
* an arbitrary PAR. */
/* Check if we can keep the input height */
tmp = gst_structure_copy (outs);
gst_structure_fixate_field_nearest_int (tmp, "height", from_h);
gst_structure_get_int (tmp, "height", &set_h);
/* Might have failed but try to keep the DAR nonetheless by
* adjusting the PAR */
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_h, w,
&to_par_n, &to_par_d)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
gst_structure_free (tmp);
goto done;
}
if (!gst_structure_has_field (tmp, "pixel-aspect-ratio"))
gst_structure_set_value (tmp, "pixel-aspect-ratio", to_par);
gst_structure_fixate_field_nearest_fraction (tmp, "pixel-aspect-ratio",
to_par_n, to_par_d);
gst_structure_get_fraction (tmp, "pixel-aspect-ratio", &set_par_n,
&set_par_d);
gst_structure_free (tmp);
/* Check if the adjusted PAR is accepted */
if (set_par_n == to_par_n && set_par_d == to_par_d) {
if (gst_structure_has_field (outs, "pixel-aspect-ratio") ||
set_par_n != set_par_d)
gst_structure_set (outs, "height", G_TYPE_INT, set_h,
"pixel-aspect-ratio", GST_TYPE_FRACTION, set_par_n, set_par_d,
NULL);
goto done;
}
/* Otherwise scale the height to the new PAR and check if the
* adjusted with is accepted. If all that fails we can't keep
* the DAR */
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_par_d,
set_par_n, &num, &den)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
goto done;
}
h = (guint) gst_util_uint64_scale_int (w, den, num);
gst_structure_fixate_field_nearest_int (outs, "height", h);
if (gst_structure_has_field (outs, "pixel-aspect-ratio") ||
set_par_n != set_par_d)
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION,
set_par_n, set_par_d, NULL);
goto done;
} else if (gst_value_is_fixed (to_par)) {
GstStructure *tmp;
gint set_h, set_w, f_h, f_w;
to_par_n = gst_value_get_fraction_numerator (to_par);
to_par_d = gst_value_get_fraction_denominator (to_par);
/* Calculate scale factor for the PAR change */
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, to_par_n,
to_par_d, &num, &den)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
goto done;
}
/* Try to keep the input height (because of interlacing) */
tmp = gst_structure_copy (outs);
gst_structure_fixate_field_nearest_int (tmp, "height", from_h);
gst_structure_get_int (tmp, "height", &set_h);
/* This might have failed but try to scale the width
* to keep the DAR nonetheless */
w = (guint) gst_util_uint64_scale_int (set_h, num, den);
gst_structure_fixate_field_nearest_int (tmp, "width", w);
gst_structure_get_int (tmp, "width", &set_w);
gst_structure_free (tmp);
/* We kept the DAR and the height is nearest to the original height */
if (set_w == w) {
gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height",
G_TYPE_INT, set_h, NULL);
goto done;
}
f_h = set_h;
f_w = set_w;
/* If the former failed, try to keep the input width at least */
tmp = gst_structure_copy (outs);
gst_structure_fixate_field_nearest_int (tmp, "width", from_w);
gst_structure_get_int (tmp, "width", &set_w);
/* This might have failed but try to scale the width
* to keep the DAR nonetheless */
h = (guint) gst_util_uint64_scale_int (set_w, den, num);
gst_structure_fixate_field_nearest_int (tmp, "height", h);
gst_structure_get_int (tmp, "height", &set_h);
gst_structure_free (tmp);
/* We kept the DAR and the width is nearest to the original width */
if (set_h == h) {
gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height",
G_TYPE_INT, set_h, NULL);
goto done;
}
/* If all this failed, keep the height that was nearest to the orignal
* height and the nearest possible width. This changes the DAR but
* there's not much else to do here.
*/
gst_structure_set (outs, "width", G_TYPE_INT, f_w, "height", G_TYPE_INT,
f_h, NULL);
goto done;
} else {
GstStructure *tmp;
gint set_h, set_w, set_par_n, set_par_d, tmp2;
/* width, height and PAR are not fixed but passthrough is not possible */
/* First try to keep the height and width as good as possible
* and scale PAR */
tmp = gst_structure_copy (outs);
gst_structure_fixate_field_nearest_int (tmp, "height", from_h);
gst_structure_get_int (tmp, "height", &set_h);
gst_structure_fixate_field_nearest_int (tmp, "width", from_w);
gst_structure_get_int (tmp, "width", &set_w);
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_h, set_w,
&to_par_n, &to_par_d)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
gst_structure_free (tmp);
goto done;
}
if (!gst_structure_has_field (tmp, "pixel-aspect-ratio"))
gst_structure_set_value (tmp, "pixel-aspect-ratio", to_par);
gst_structure_fixate_field_nearest_fraction (tmp, "pixel-aspect-ratio",
to_par_n, to_par_d);
gst_structure_get_fraction (tmp, "pixel-aspect-ratio", &set_par_n,
&set_par_d);
gst_structure_free (tmp);
if (set_par_n == to_par_n && set_par_d == to_par_d) {
gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height",
G_TYPE_INT, set_h, NULL);
if (gst_structure_has_field (outs, "pixel-aspect-ratio") ||
set_par_n != set_par_d)
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION,
set_par_n, set_par_d, NULL);
goto done;
}
/* Otherwise try to scale width to keep the DAR with the set
* PAR and height */
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_par_d,
set_par_n, &num, &den)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
goto done;
}
w = (guint) gst_util_uint64_scale_int (set_h, num, den);
tmp = gst_structure_copy (outs);
gst_structure_fixate_field_nearest_int (tmp, "width", w);
gst_structure_get_int (tmp, "width", &tmp2);
gst_structure_free (tmp);
if (tmp2 == w) {
gst_structure_set (outs, "width", G_TYPE_INT, tmp2, "height",
G_TYPE_INT, set_h, NULL);
if (gst_structure_has_field (outs, "pixel-aspect-ratio") ||
set_par_n != set_par_d)
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION,
set_par_n, set_par_d, NULL);
goto done;
}
/* ... or try the same with the height */
h = (guint) gst_util_uint64_scale_int (set_w, den, num);
tmp = gst_structure_copy (outs);
gst_structure_fixate_field_nearest_int (tmp, "height", h);
gst_structure_get_int (tmp, "height", &tmp2);
gst_structure_free (tmp);
if (tmp2 == h) {
gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height",
G_TYPE_INT, tmp2, NULL);
if (gst_structure_has_field (outs, "pixel-aspect-ratio") ||
set_par_n != set_par_d)
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION,
set_par_n, set_par_d, NULL);
goto done;
}
/* If all fails we can't keep the DAR and take the nearest values
* for everything from the first try */
gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height",
G_TYPE_INT, set_h, NULL);
if (gst_structure_has_field (outs, "pixel-aspect-ratio") ||
set_par_n != set_par_d)
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION,
set_par_n, set_par_d, NULL);
}
}
done:
GST_DEBUG_OBJECT (base, "fixated othercaps to %" GST_PTR_FORMAT, othercaps);
if (from_par == &fpar)
g_value_unset (&fpar);
if (to_par == &tpar)
g_value_unset (&tpar);
return othercaps;
}
static gboolean
gst_image_freeze_sink_setcaps (GstImageFreeze * self, GstCaps * caps)
{
gboolean ret = FALSE;
GstStructure *s;
gint fps_n, fps_d;
GstCaps *othercaps, *intersection;
guint i, n;
GstPad *pad;
pad = self->sinkpad;
caps = gst_caps_make_writable (gst_caps_ref (caps));
GST_DEBUG_OBJECT (pad, "Setting caps: %" GST_PTR_FORMAT, caps);
s = gst_caps_get_structure (caps, 0);
/* 1. Remove framerate */
gst_structure_remove_field (s, "framerate");
gst_structure_set (s, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1,
NULL);
/* 2. Intersect with template caps */
othercaps = (GstCaps *) gst_pad_get_pad_template_caps (pad);
intersection = gst_caps_intersect (caps, othercaps);
GST_DEBUG_OBJECT (pad, "Intersecting: %" GST_PTR_FORMAT, caps);
GST_DEBUG_OBJECT (pad, "with: %" GST_PTR_FORMAT, othercaps);
GST_DEBUG_OBJECT (pad, "gave: %" GST_PTR_FORMAT, intersection);
gst_caps_unref (caps);
gst_caps_unref (othercaps);
caps = intersection;
intersection = othercaps = NULL;
/* 3. Intersect with downstream peer caps */
othercaps = gst_pad_peer_query_caps (self->srcpad, caps);
GST_DEBUG_OBJECT (pad, "Peer query resulted: %" GST_PTR_FORMAT, othercaps);
gst_caps_unref (caps);
caps = othercaps;
othercaps = NULL;
/* 4. For every candidate check if it's accepted downstream
* and fixate framerate to nearest 25/1 */
n = gst_caps_get_size (caps);
for (i = 0; i < n; i++) {
GstCaps *candidate = gst_caps_new_empty ();
GstStructure *s = gst_structure_copy (gst_caps_get_structure (caps, i));
gst_caps_append_structure (candidate, s);
if (gst_structure_has_field_typed (s, "framerate", GST_TYPE_FRACTION) ||
gst_structure_fixate_field_nearest_fraction (s, "framerate", 25, 1)) {
if (gst_pad_peer_query_accept_caps (self->srcpad, candidate)) {
gst_structure_get_fraction (s, "framerate", &fps_n, &fps_d);
if (fps_d != 0) {
g_mutex_lock (&self->lock);
self->fps_n = fps_n;
self->fps_d = fps_d;
g_mutex_unlock (&self->lock);
GST_DEBUG_OBJECT (pad, "Setting caps %" GST_PTR_FORMAT, candidate);
gst_pad_set_caps (self->srcpad, candidate);
gst_caps_unref (candidate);
ret = TRUE;
goto done;
} else {
GST_WARNING_OBJECT (pad, "Invalid caps with framerate %d/%d", fps_n,
fps_d);
}
}
}
gst_caps_unref (candidate);
}
done:
if (!ret)
GST_ERROR_OBJECT (pad, "No usable caps found");
gst_caps_unref (caps);
return ret;
}
static gboolean
gst_goom_src_negotiate (GstGoom * goom)
{
GstCaps *othercaps, *target;
GstStructure *structure;
GstCaps *templ;
GstQuery *query;
GstBufferPool *pool;
GstStructure *config;
guint size, min, max;
templ = gst_pad_get_pad_template_caps (goom->srcpad);
GST_DEBUG_OBJECT (goom, "performing negotiation");
/* see what the peer can do */
othercaps = gst_pad_peer_query_caps (goom->srcpad, NULL);
if (othercaps) {
target = gst_caps_intersect (othercaps, templ);
gst_caps_unref (othercaps);
gst_caps_unref (templ);
if (gst_caps_is_empty (target))
goto no_format;
target = gst_caps_truncate (target);
} else {
target = templ;
}
structure = gst_caps_get_structure (target, 0);
gst_structure_fixate_field_nearest_int (structure, "width", DEFAULT_WIDTH);
gst_structure_fixate_field_nearest_int (structure, "height", DEFAULT_HEIGHT);
gst_structure_fixate_field_nearest_fraction (structure, "framerate",
DEFAULT_FPS_N, DEFAULT_FPS_D);
gst_goom_src_setcaps (goom, target);
/* try to get a bufferpool now */
/* find a pool for the negotiated caps now */
query = gst_query_new_allocation (target, TRUE);
if (!gst_pad_peer_query (goom->srcpad, query)) {
/* no problem, we use the query defaults */
GST_DEBUG_OBJECT (goom, "ALLOCATION query failed");
}
if (gst_query_get_n_allocation_pools (query) > 0) {
/* we got configuration from our peer, parse them */
gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
} else {
pool = NULL;
size = goom->outsize;
min = max = 0;
}
if (pool == NULL) {
/* we did not get a pool, make one ourselves then */
pool = gst_buffer_pool_new ();
}
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (config, target, size, min, max);
gst_buffer_pool_set_config (pool, config);
if (goom->pool) {
gst_buffer_pool_set_active (goom->pool, FALSE);
gst_object_unref (goom->pool);
}
goom->pool = pool;
/* and activate */
gst_buffer_pool_set_active (pool, TRUE);
gst_caps_unref (target);
return TRUE;
no_format:
{
gst_caps_unref (target);
return FALSE;
}
}
static void
gst_ffmpegscale_fixate_caps(GstBaseTransform* trans,
GstPadDirection direction, GstCaps* caps, GstCaps* othercaps) {
GstStructure* ins, *outs;
const GValue* from_par, *to_par;
g_return_if_fail(gst_caps_is_fixed(caps));
GST_DEBUG_OBJECT(trans, "trying to fixate othercaps %" GST_PTR_FORMAT
" based on caps %" GST_PTR_FORMAT, othercaps, caps);
ins = gst_caps_get_structure(caps, 0);
outs = gst_caps_get_structure(othercaps, 0);
from_par = gst_structure_get_value(ins, "pixel-aspect-ratio");
to_par = gst_structure_get_value(outs, "pixel-aspect-ratio");
/* we have both PAR but they might not be fixated */
if (from_par && to_par) {
gint from_w, from_h, from_par_n, from_par_d, to_par_n, to_par_d;
gint count = 0, w = 0, h = 0;
guint num, den;
/* from_par should be fixed */
g_return_if_fail(gst_value_is_fixed(from_par));
from_par_n = gst_value_get_fraction_numerator(from_par);
from_par_d = gst_value_get_fraction_denominator(from_par);
/* fixate the out PAR */
if (!gst_value_is_fixed(to_par)) {
GST_DEBUG_OBJECT(trans, "fixating to_par to %dx%d", from_par_n,
from_par_d);
gst_structure_fixate_field_nearest_fraction(outs, "pixel-aspect-ratio",
from_par_n, from_par_d);
}
to_par_n = gst_value_get_fraction_numerator(to_par);
to_par_d = gst_value_get_fraction_denominator(to_par);
/* if both width and height are already fixed, we can't do anything
* about it anymore */
if (gst_structure_get_int(outs, "width", &w)) {
++count;
}
if (gst_structure_get_int(outs, "height", &h)) {
++count;
}
if (count == 2) {
GST_DEBUG_OBJECT(trans, "dimensions already set to %dx%d, not fixating",
w, h);
return;
}
gst_structure_get_int(ins, "width", &from_w);
gst_structure_get_int(ins, "height", &from_h);
if (!gst_video_calculate_display_ratio(&num, &den, from_w, from_h,
from_par_n, from_par_d, to_par_n, to_par_d)) {
GST_ELEMENT_ERROR(trans, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
return;
}
GST_DEBUG_OBJECT(trans,
"scaling input with %dx%d and PAR %d/%d to output PAR %d/%d",
from_w, from_h, from_par_n, from_par_d, to_par_n, to_par_d);
GST_DEBUG_OBJECT(trans, "resulting output should respect ratio of %d/%d",
num, den);
/* now find a width x height that respects this display ratio.
* prefer those that have one of w/h the same as the incoming video
* using wd / hd = num / den */
/* if one of the output width or height is fixed, we work from there */
if (h) {
GST_DEBUG_OBJECT(trans, "height is fixed,scaling width");
w = (guint) gst_util_uint64_scale_int(h, num, den);
} else if (w) {
GST_DEBUG_OBJECT(trans, "width is fixed, scaling height");
h = (guint) gst_util_uint64_scale_int(w, den, num);
} else {
/* none of width or height is fixed, figure out both of them based only on
* the input width and height */
/* check hd / den is an integer scale factor, and scale wd with the PAR */
if (from_h % den == 0) {
GST_DEBUG_OBJECT(trans, "keeping video height");
h = from_h;
w = (guint) gst_util_uint64_scale_int(h, num, den);
} else if (from_w % num == 0) {
GST_DEBUG_OBJECT(trans, "keeping video width");
w = from_w;
h = (guint) gst_util_uint64_scale_int(w, den, num);
} else {
GST_DEBUG_OBJECT(trans, "approximating but keeping video height");
h = from_h;
w = (guint) gst_util_uint64_scale_int(h, num, den);
}
}
GST_DEBUG_OBJECT(trans, "scaling to %dx%d", w, h);
/* now fixate */
gst_structure_fixate_field_nearest_int(outs, "width", w);
gst_structure_fixate_field_nearest_int(outs, "height", h);
} else {
gint width, height;
if (gst_structure_get_int(ins, "width", &width)) {
if (gst_structure_has_field(outs, "width")) {
gst_structure_fixate_field_nearest_int(outs, "width", width);
}
}
if (gst_structure_get_int(ins, "height", &height)) {
if (gst_structure_has_field(outs, "height")) {
gst_structure_fixate_field_nearest_int(outs, "height", height);
}
}
}
GST_DEBUG_OBJECT(trans, "fixated othercaps to %" GST_PTR_FORMAT, othercaps);
}
static gboolean
gst_monoscope_src_negotiate (GstMonoscope * monoscope)
{
GstCaps *othercaps, *target;
GstStructure *structure;
GstCaps *templ;
GstQuery *query;
GstBufferPool *pool;
GstStructure *config;
guint size, min, max;
templ = gst_pad_get_pad_template_caps (monoscope->srcpad);
GST_DEBUG_OBJECT (monoscope, "performing negotiation");
/* see what the peer can do */
othercaps = gst_pad_peer_query_caps (monoscope->srcpad, NULL);
if (othercaps) {
target = gst_caps_intersect (othercaps, templ);
gst_caps_unref (othercaps);
gst_caps_unref (templ);
if (gst_caps_is_empty (target))
goto no_format;
target = gst_caps_truncate (target);
} else {
target = templ;
}
target = gst_caps_make_writable (target);
structure = gst_caps_get_structure (target, 0);
gst_structure_fixate_field_nearest_int (structure, "width", 320);
gst_structure_fixate_field_nearest_int (structure, "height", 240);
gst_structure_fixate_field_nearest_fraction (structure, "framerate", 25, 1);
gst_monoscope_src_setcaps (monoscope, target);
/* try to get a bufferpool now */
/* find a pool for the negotiated caps now */
query = gst_query_new_allocation (target, TRUE);
if (!gst_pad_peer_query (monoscope->srcpad, query)) {
}
if (gst_query_get_n_allocation_pools (query) > 0) {
/* we got configuration from our peer, parse them */
gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
} else {
pool = NULL;
size = monoscope->outsize;
min = max = 0;
}
if (pool == NULL) {
/* we did not get a pool, make one ourselves then */
pool = gst_buffer_pool_new ();
}
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (config, target, size, min, max);
gst_buffer_pool_set_config (pool, config);
if (monoscope->pool) {
gst_buffer_pool_set_active (monoscope->pool, TRUE);
gst_object_unref (monoscope->pool);
}
monoscope->pool = pool;
/* and activate */
gst_buffer_pool_set_active (pool, TRUE);
gst_caps_unref (target);
return TRUE;
no_format:
{
gst_caps_unref (target);
return FALSE;
}
}
