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 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_ladspa_source_type_fixate (GstBaseSrc * base, GstCaps * caps)
{
GstLADSPASource *ladspa = GST_LADSPA_SOURCE (base);
GstStructure *structure;
caps = gst_caps_make_writable (caps);
structure = gst_caps_get_structure (caps, 0);
GST_DEBUG_OBJECT (ladspa, "fixating samplerate to %d", GST_AUDIO_DEF_RATE);
gst_structure_fixate_field_nearest_int (structure, "rate",
GST_AUDIO_DEF_RATE);
gst_structure_fixate_field_string (structure, "format", GST_AUDIO_NE (F32));
gst_structure_fixate_field_nearest_int (structure, "channels",
ladspa->ladspa.klass->count.audio.out);
caps =
GST_BASE_SRC_CLASS (gst_ladspa_source_type_parent_class)->fixate
(base, caps);
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;
}
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;
}
static void
gst_base_audio_src_fixate (GstBaseSrc * bsrc, GstCaps * caps)
{
GstStructure *s;
gint width, depth;
s = gst_caps_get_structure (caps, 0);
/* fields for all formats */
gst_structure_fixate_field_nearest_int (s, "rate", 44100);
gst_structure_fixate_field_nearest_int (s, "channels", 2);
gst_structure_fixate_field_nearest_int (s, "width", 16);
/* fields for int */
if (gst_structure_has_field (s, "depth")) {
gst_structure_get_int (s, "width", &width);
/* round width to nearest multiple of 8 for the depth */
depth = GST_ROUND_UP_8 (width);
gst_structure_fixate_field_nearest_int (s, "depth", depth);
}
if (gst_structure_has_field (s, "signed"))
gst_structure_fixate_field_boolean (s, "signed", TRUE);
if (gst_structure_has_field (s, "endianness"))
gst_structure_fixate_field_nearest_int (s, "endianness", G_BYTE_ORDER);
}
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_speex_enc_sink_getcaps (GstPad * pad)
{
GstCaps *caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
GstCaps *peercaps = NULL;
GstSpeexEnc *enc = GST_SPEEX_ENC (gst_pad_get_parent_element (pad));
peercaps = gst_pad_peer_get_caps (enc->srcpad);
if (peercaps) {
if (!gst_caps_is_empty (peercaps) && !gst_caps_is_any (peercaps)) {
GstStructure *ps = gst_caps_get_structure (peercaps, 0);
GstStructure *s = gst_caps_get_structure (caps, 0);
gint rate, channels;
if (gst_structure_get_int (ps, "rate", &rate)) {
gst_structure_fixate_field_nearest_int (s, "rate", rate);
}
if (gst_structure_get_int (ps, "channels", &channels)) {
gst_structure_fixate_field_nearest_int (s, "channels", channels);
}
}
gst_caps_unref (peercaps);
}
gst_object_unref (enc);
return 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 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 void
gst_osx_video_src_fixate (GstBaseSrc * bsrc, GstCaps * caps)
{
GstStructure *structure;
int i;
/* this function is for choosing defaults as a last resort */
for (i = 0; i < (int) gst_caps_get_size (caps); ++i) {
structure = gst_caps_get_structure (caps, i);
gst_structure_fixate_field_nearest_int (structure, "width", 640);
gst_structure_fixate_field_nearest_int (structure, "height", 480);
// ###: if we ever support choosing framerates, do something with this
//gst_structure_fixate_field_nearest_fraction (structure, "framerate", 15, 2);
}
}
static gboolean
gst_dtmf_src_negotiate (GstBaseSrc * basesrc)
{
GstDTMFSrc *dtmfsrc = GST_DTMF_SRC (basesrc);
GstCaps *caps;
GstStructure *s;
gboolean ret;
caps = gst_pad_get_allowed_caps (GST_BASE_SRC_PAD (basesrc));
if (!caps)
caps =
gst_caps_copy (gst_pad_get_pad_template_caps (GST_BASE_SRC_PAD
(basesrc)));
if (gst_caps_is_empty (caps))
return FALSE;
gst_caps_truncate (caps);
s = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_nearest_int (s, "rate", DEFAULT_SAMPLE_RATE);
if (!gst_structure_get_int (s, "rate", &dtmfsrc->sample_rate)) {
GST_ERROR_OBJECT (dtmfsrc, "Could not get rate");
gst_caps_unref (caps);
return FALSE;
}
ret = gst_pad_set_caps (GST_BASE_SRC_PAD (basesrc), caps);
gst_caps_unref (caps);
return ret;
}
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 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
gst_opus_dec_negotiate (GstOpusDec * dec, const GstAudioChannelPosition * pos)
{
GstCaps *caps = gst_pad_get_allowed_caps (GST_AUDIO_DECODER_SRC_PAD (dec));
GstStructure *s;
GstAudioInfo info;
if (caps) {
caps = gst_caps_truncate (caps);
caps = gst_caps_make_writable (caps);
s = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_nearest_int (s, "rate", 48000);
gst_structure_get_int (s, "rate", &dec->sample_rate);
gst_structure_fixate_field_nearest_int (s, "channels", dec->n_channels);
gst_structure_get_int (s, "channels", &dec->n_channels);
gst_caps_unref (caps);
} else {
dec->sample_rate = 48000;
}
GST_INFO_OBJECT (dec, "Negotiated %d channels, %d Hz", dec->n_channels,
dec->sample_rate);
/* pass valid order to audio info */
if (pos) {
memcpy (dec->opus_pos, pos, sizeof (pos[0]) * dec->n_channels);
gst_audio_channel_positions_to_valid_order (dec->opus_pos, dec->n_channels);
}
/* set up source format */
gst_audio_info_init (&info);
gst_audio_info_set_format (&info, GST_AUDIO_FORMAT_S16,
dec->sample_rate, dec->n_channels, pos ? dec->opus_pos : NULL);
gst_audio_decoder_set_output_format (GST_AUDIO_DECODER (dec), &info);
/* but we still need the opus order for later reordering */
if (pos) {
memcpy (dec->opus_pos, pos, sizeof (pos[0]) * dec->n_channels);
gst_audio_channel_positions_to_valid_order (dec->opus_pos, dec->n_channels);
} else {
dec->opus_pos[0] = GST_AUDIO_CHANNEL_POSITION_INVALID;
}
dec->info = info;
}
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_rtp_celt_pay_getcaps (GstRTPBasePayload * payload, GstPad * pad,
GstCaps * filter)
{
GstCaps *otherpadcaps;
GstCaps *caps;
const gchar *params;
caps = gst_pad_get_pad_template_caps (pad);
otherpadcaps = gst_pad_get_allowed_caps (payload->srcpad);
if (otherpadcaps) {
if (!gst_caps_is_empty (otherpadcaps)) {
GstStructure *ps;
GstStructure *s;
gint clock_rate = 0, frame_size = 0, channels = 1;
caps = gst_caps_make_writable (caps);
ps = gst_caps_get_structure (otherpadcaps, 0);
s = gst_caps_get_structure (caps, 0);
if (gst_structure_get_int (ps, "clock-rate", &clock_rate)) {
gst_structure_fixate_field_nearest_int (s, "rate", clock_rate);
}
if ((params = gst_structure_get_string (ps, "frame-size")))
frame_size = atoi (params);
if (frame_size)
gst_structure_set (s, "frame-size", G_TYPE_INT, frame_size, NULL);
if ((params = gst_structure_get_string (ps, "encoding-params"))) {
channels = atoi (params);
gst_structure_fixate_field_nearest_int (s, "channels", channels);
}
GST_DEBUG_OBJECT (payload, "clock-rate=%d frame-size=%d channels=%d",
clock_rate, frame_size, channels);
}
gst_caps_unref (otherpadcaps);
}
return 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 GstCaps *
gst_inter_audio_src_fixate (GstBaseSrc * src, GstCaps * caps)
{
GstStructure *structure;
GST_DEBUG_OBJECT (src, "fixate");
caps = gst_caps_make_writable (caps);
caps = gst_caps_truncate (caps);
structure = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_string (structure, "format", GST_AUDIO_NE (S16));
gst_structure_fixate_field_nearest_int (structure, "channels", 2);
gst_structure_fixate_field_nearest_int (structure, "rate", 48000);
gst_structure_fixate_field_string (structure, "layout", "interleaved");
return caps;
}
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 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 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 *
gst_opus_dec_negotiate (GstOpusDec * dec)
{
GstCaps *caps = gst_pad_get_allowed_caps (GST_AUDIO_DECODER_SRC_PAD (dec));
GstStructure *s;
caps = gst_caps_make_writable (caps);
gst_caps_truncate (caps);
s = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_nearest_int (s, "rate", 48000);
gst_structure_get_int (s, "rate", &dec->sample_rate);
gst_structure_fixate_field_nearest_int (s, "channels", dec->n_channels);
gst_structure_get_int (s, "channels", &dec->n_channels);
GST_INFO_OBJECT (dec, "Negotiated %d channels, %d Hz", dec->n_channels,
dec->sample_rate);
return caps;
}
static GstCaps *
gst_mikmod_srcfixate (GstPad * pad, const GstCaps * caps)
{
GstCaps *ret;
GstStructure *structure;
/* FIXME: select est caps here */
if (gst_caps_get_size (caps) > 1)
return NULL;
ret = gst_caps_copy (caps);
structure = gst_caps_get_structure (ret, 0);
if (gst_structure_fixate_field_nearest_int (structure, "channels", 2))
return ret;
if (gst_structure_fixate_field_nearest_int (structure, "rate", 44100))
return ret;
gst_caps_free (ret);
return NULL;
}
static gboolean
gstbt_sim_syn_setup (GstBtAudioSynth * base, GstPad * pad, GstCaps * caps)
{
GstStructure *structure;
gint i, n = gst_caps_get_size (caps);
for (i = 0; i < n; i++) {
structure = gst_caps_get_structure (caps, i);
gst_structure_fixate_field_nearest_int (structure, "channels", 1);
}
return TRUE;
}
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);
}
