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discoverer: Extract video information from caps manually without GstVideoInfo

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The caps might not be fixated (which is required by GstVideoInfo) and we
would assert otherwise. However the caps often contain useful
information in the already-fixed parts that we can use here.
This commit is contained in:
Sebastian Dröge 2016-11-28 10:12:49 +02:00
parent bd74b102fa
commit 4efc15dffb
1 changed files with 43 additions and 16 deletions
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59
gst-libs/gst/pbutils/gstdiscoverer.c
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@ -47,6 +47,8 @@
#include <gst/video/video.h>
#include <gst/audio/audio.h>
#include <string.h>
#include "pbutils.h"
#include "pbutils-private.h"
@ -806,7 +808,7 @@ collect_information (GstDiscoverer * dc, const GstStructure * st,
GstStructure *caps_st;
GstTagList *tags_st;
const gchar *name;
int tmp;
gint tmp, tmp2;
guint utmp;
if (!st || !gst_structure_id_has_field (st, _CAPS_QUARK)) {
@ -840,7 +842,8 @@ collect_information (GstDiscoverer * dc, const GstStructure * st,
format = gst_audio_format_from_string (format_str);
finfo = gst_audio_format_get_info (format);
info->depth = GST_AUDIO_FORMAT_INFO_DEPTH (finfo);
if (finfo)
info->depth = GST_AUDIO_FORMAT_INFO_DEPTH (finfo);
}
if (gst_structure_id_has_field (st, _TAGS_QUARK)) {
@ -872,27 +875,51 @@ collect_information (GstDiscoverer * dc, const GstStructure * st,
} else if (g_str_has_prefix (name, "video/") ||
g_str_has_prefix (name, "image/")) {
GstDiscovererVideoInfo *info;
GstVideoInfo vinfo;
const gchar *caps_str;
info = (GstDiscovererVideoInfo *) make_info (parent,
GST_TYPE_DISCOVERER_VIDEO_INFO, caps);
if (gst_video_info_from_caps (&vinfo, caps)) {
info->width = (guint) vinfo.width;
info->height = (guint) vinfo.height;
if (gst_structure_get_int (caps_st, "width", &tmp))
info->width = (guint) tmp;
if (gst_structure_get_int (caps_st, "height", &tmp))
info->height = (guint) tmp;
info->depth = vinfo.finfo->bits * vinfo.finfo->n_components;
info->par_num = vinfo.par_n;
info->par_denom = vinfo.par_d;
info->framerate_num = vinfo.fps_n;
info->framerate_denom = vinfo.fps_d;
info->interlaced =
vinfo.interlace_mode != GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
if (gst_structure_get_fraction (caps_st, "framerate", &tmp, &tmp2)) {
info->framerate_num = (guint) tmp;
info->framerate_denom = (guint) tmp2;
} else {
info->framerate_num = 0;
info->framerate_denom = 1;
}
if (gst_structure_get_fraction (caps_st, "pixel-aspect-ratio", &tmp, &tmp2)) {
info->par_num = (guint) tmp;
info->par_denom = (guint) tmp2;
} else {
info->par_num = 1;
info->par_denom = 1;
}
/* FIXME: we only want to extract depth if raw video is what's in the
* container (i.e. not if there is a decoder involved) */
caps_str = gst_structure_get_string (caps_st, "format");
if (caps_str != NULL) {
const GstVideoFormatInfo *finfo;
GstVideoFormat format;
format = gst_video_format_from_string (caps_str);
finfo = gst_video_format_get_info (format);
if (finfo)
info->depth = finfo->bits * finfo->n_components;
}
caps_str = gst_structure_get_string (caps_st, "interlace-mode");
if (!caps_str || strcmp (caps_str, "progressive") == 0)
info->interlaced = FALSE;
else
info->interlaced = TRUE;
if (gst_structure_id_has_field (st, _TAGS_QUARK)) {
gst_structure_id_get (st, _TAGS_QUARK, GST_TYPE_TAG_LIST, &tags_st, NULL);
if (gst_tag_list_get_uint (tags_st, GST_TAG_BITRATE, &utmp) ||