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matroska: Export h.264 profile and level in caps
This replicates the code in qtdemux to export the h.264 profile and level in the stream caps. https://bugzilla.gnome.org/show_bug.cgi?id=614651
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2 changed files with 113 additions and 0 deletions
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@ -50,6 +50,7 @@
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#include <math.h>
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#include <string.h>
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#include <glib/gprintf.h>
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/* For AVI compatibility mode
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and for fourcc stuff */
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@ -5803,6 +5804,103 @@ gst_matroska_demux_sink_activate_pull (GstPad * sinkpad, gboolean active)
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return TRUE;
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}
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/*
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* XXX: This code is duplicated in gst/qtdemux/qtdemux.c. Please replicate any
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* changes you make over there as well.
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*/
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static gchar *
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avc_profile_idc_to_string (guint profile_idc, guint constraint_set_flags)
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{
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const gchar *profile = NULL;
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gint csf1, csf3;
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csf1 = (constraint_set_flags & 0x40) >> 6;
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csf3 = (constraint_set_flags & 0x10) >> 4;
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switch (profile_idc) {
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case 66:
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if (csf1)
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profile = "constrained-baseline";
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else
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profile = "baseline";
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break;
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case 77:
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profile = "main";
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break;
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case 88:
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profile = "extended";
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break;
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case 100:
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profile = "high";
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break;
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case 110:
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if (csf3)
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profile = "high-10-intra";
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else
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profile = "high-10";
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break;
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case 122:
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if (csf3)
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profile = "high-4:2:2-intra";
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else
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profile = "high-4:2:2";
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break;
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case 244:
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if (csf3)
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profile = "high-4:4:4-intra";
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else
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profile = "high-4:4:4";
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break;
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case 44:
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profile = "cavlc-4:4:4-intra";
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break;
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default:
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return NULL;
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}
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return g_strdup (profile);
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}
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static gchar *
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avc_level_idc_to_string (guint level_idc, guint constraint_set_flags)
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{
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const gchar *level = NULL;
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gchar buf[4];
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gint csf3;
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csf3 = (constraint_set_flags & 0x10) >> 4;
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if (level_idc == 11 && csf3)
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level = "1b";
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else {
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/* Level is (level_idc / 10) */
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if (level_idc % 10 == 0)
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g_sprintf (buf, "%u", level_idc / 10);
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else
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g_sprintf (buf, "%u.%u", level_idc / 10, level_idc % 10);
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level = buf;
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}
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return g_strdup (level);
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}
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static void
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avc_get_profile_and_level_string (const guint8 * avc_data, gint size,
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gchar ** profile, gchar ** level)
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{
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if (size >= 2)
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/* First byte is the version, second is the profile indication,
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* and third is the 5 contraint_set_flags and 3 reserved bits */
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*profile = avc_profile_idc_to_string (GST_READ_UINT8 (avc_data + 1),
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GST_READ_UINT8 (avc_data + 2));
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if (size >= 4)
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/* Fourth byte is the level indication */
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*level = avc_level_idc_to_string (GST_READ_UINT8 (avc_data + 3),
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GST_READ_UINT8 (avc_data + 2));
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}
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static GstCaps *
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gst_matroska_demux_video_caps (GstMatroskaTrackVideoContext *
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videocontext, const gchar * codec_id, guint8 * data, guint size,
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@ -5967,6 +6065,17 @@ gst_matroska_demux_video_caps (GstMatroskaTrackVideoContext *
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caps = gst_caps_new_simple ("video/x-h264", NULL);
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if (data) {
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GstBuffer *priv = gst_buffer_new_and_alloc (size);
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gchar *profile = NULL, *level = NULL;
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avc_get_profile_and_level_string (data, size, &profile, &level);
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if (profile) {
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gst_caps_set_simple (caps, "profile", G_TYPE_STRING, profile, NULL);
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g_free (profile);
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}
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if (level) {
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gst_caps_set_simple (caps, "level", G_TYPE_STRING, level, NULL);
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g_free (level);
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}
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memcpy (GST_BUFFER_DATA (priv), data, size);
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gst_caps_set_simple (caps, "codec_data", GST_TYPE_BUFFER, priv, NULL);
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@ -5013,6 +5013,10 @@ qtdemux_get_rtsp_uri_from_hndl (GstQTDemux * qtdemux, GNode * minf)
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return uri;
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}
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/*
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* XXX: This code is duplicated in gst/mastroska/matroska-demux.c. Please
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* replicate any changes you make over there as well.
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*/
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static gchar *
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avc_profile_idc_to_string (guint profile_idc, guint constraint_set_flags)
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{
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