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y4menc: Add interlaced support

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Fixes #591713

Signed-off-by: David Schleef <ds@schleef.org>
This commit is contained in:
Zaheer Merali 2009-09-05 20:51:14 -07:00 committed by David Schleef
parent 55d2754098
commit c6b2dff77e
2 changed files with 29 additions and 5 deletions
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31
gst/y4m/gsty4mencode.c
View file

@ -159,7 +159,7 @@ gst_y4m_encode_setcaps (GstPad * pad, GstCaps * vscaps)
GstStructure *structure;
gboolean res;
gint w, h;
const GValue *fps, *par;
const GValue *fps, *par, *interlaced;
filter = GST_Y4M_ENCODE (GST_PAD_PARENT (pad));
@ -172,6 +172,9 @@ gst_y4m_encode_setcaps (GstPad * pad, GstCaps * vscaps)
if (!res || w <= 0 || h <= 0 || !GST_VALUE_HOLDS_FRACTION (fps))
return FALSE;
/* optional interlaced info */
interlaced = gst_structure_get_value (structure, "interlaced");
/* optional par info */
par = gst_structure_get_value (structure, "pixel-aspect-ratio");
@ -186,7 +189,12 @@ gst_y4m_encode_setcaps (GstPad * pad, GstCaps * vscaps)
filter->par_num = 0;
filter->par_den = 0;
}
if ((interlaced != NULL) && G_VALUE_HOLDS (interlaced, G_TYPE_BOOLEAN)) {
filter->interlaced = g_value_get_boolean (interlaced);
} else {
/* assume progressive if no interlaced property in caps */
filter->interlaced = FALSE;
}
/* the template caps will do for the src pad, should always accept */
return gst_pad_set_caps (filter->srcpad,
gst_static_pad_template_get_caps (&y4mencode_src_factory));
@ -197,9 +205,17 @@ gst_y4m_encode_get_stream_header (GstY4mEncode * filter)
{
gpointer header;
GstBuffer *buf;
gchar interlaced;
header = g_strdup_printf ("YUV4MPEG2 W%d H%d I? F%d:%d A%d:%d\n",
filter->width, filter->height,
interlaced = 'p';
if (filter->interlaced && filter->top_field_first)
interlaced = 't';
else if (filter->interlaced)
interlaced = 'b';
header = g_strdup_printf ("YUV4MPEG2 W%d H%d I%c F%d:%d A%d:%d\n",
filter->width, filter->height, interlaced,
filter->fps_num, filter->fps_den, filter->par_num, filter->par_den);
buf = gst_buffer_new ();
@ -244,6 +260,13 @@ gst_y4m_encode_chain (GstPad * pad, GstBuffer * buf)
timestamp = GST_BUFFER_TIMESTAMP (buf);
if (G_UNLIKELY (!filter->header)) {
if (filter->interlaced == TRUE) {
if (GST_BUFFER_FLAG_IS_SET (buf, GST_VIDEO_BUFFER_TFF)) {
filter->top_field_first = TRUE;
} else {
filter->top_field_first = FALSE;
}
}
outbuf = gst_y4m_encode_get_stream_header (filter);
filter->header = TRUE;
outbuf = gst_buffer_join (outbuf, gst_y4m_encode_get_frame_header (filter));

3
gst/y4m/gsty4mencode.h
View file

@ -51,7 +51,8 @@ struct _GstY4mEncode {
gint width, height;
gint fps_num, fps_den;
gint par_num, par_den;
gboolean interlaced;
gboolean top_field_first;
/* state information */
gboolean header;
};