v4l2: Add MPEG-2 profile and level support

Add support for V4L2 MPEG-2 decoders reporting supported profiles and
levels.

diff --git a/sys/v4l2/Makefile.am b/sys/v4l2/Makefile.am
index 1c311018b87ec735cc4c999dc8bc4ad76a9439ad..cd478481eded40c3c19a2d793a2e32530a6edcee 100644 (file)
--- a/sys/v4l2/Makefile.am
+++ b/sys/v4l2/Makefile.am
@@ -23,6 +23,7 @@ libgstvideo4linux2_la_SOURCES = gstv4l2.c \
                                gstv4l2h265codec.c \
                                gstv4l2h265enc.c \
                                gstv4l2jpegenc.c \
+                               gstv4l2mpeg2codec.c \
                                gstv4l2mpeg4enc.c \
                                gstv4l2mpeg4codec.c \
                                gstv4l2vidorient.c \

diff --git a/sys/v4l2/gstv4l2mpeg2codec.c b/sys/v4l2/gstv4l2mpeg2codec.c
new file mode 100644 (file)
index 0000000..2106acf
--- /dev/null
+++ b/sys/v4l2/gstv4l2mpeg2codec.c
@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2019 Philipp Zabel <philipp.zabel@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "gstv4l2mpeg2codec.h"
+
+#include <gst/gst.h>
+#include "ext/v4l2-controls.h"
+
+static gint
+v4l2_profile_from_string (const gchar * profile)
+{
+  gint v4l2_profile = -1;
+
+  if (g_str_equal (profile, "simple"))
+    v4l2_profile = V4L2_MPEG_VIDEO_MPEG2_PROFILE_SIMPLE;
+  else if (g_str_equal (profile, "main"))
+    v4l2_profile = V4L2_MPEG_VIDEO_MPEG2_PROFILE_MAIN;
+  else if (g_str_equal (profile, "snr"))
+    v4l2_profile = V4L2_MPEG_VIDEO_MPEG2_PROFILE_SNR_SCALABLE;
+  else if (g_str_equal (profile, "spatial"))
+    v4l2_profile = V4L2_MPEG_VIDEO_MPEG2_PROFILE_SPATIALLY_SCALABLE;
+  else if (g_str_equal (profile, "high"))
+    v4l2_profile = V4L2_MPEG_VIDEO_MPEG2_PROFILE_HIGH;
+  else if (g_str_equal (profile, "multiview"))
+    v4l2_profile = V4L2_MPEG_VIDEO_MPEG2_PROFILE_MULTIVIEW;
+  else
+    GST_WARNING ("Unsupported profile string '%s'", profile);
+
+  return v4l2_profile;
+}
+
+static const gchar *
+v4l2_profile_to_string (gint v4l2_profile)
+{
+  switch (v4l2_profile) {
+    case V4L2_MPEG_VIDEO_MPEG2_PROFILE_SIMPLE:
+      return "simple";
+    case V4L2_MPEG_VIDEO_MPEG2_PROFILE_MAIN:
+      return "main";
+    case V4L2_MPEG_VIDEO_MPEG2_PROFILE_SNR_SCALABLE:
+      return "snr";
+    case V4L2_MPEG_VIDEO_MPEG2_PROFILE_SPATIALLY_SCALABLE:
+      return "spatial";
+    case V4L2_MPEG_VIDEO_MPEG2_PROFILE_HIGH:
+      return "high";
+    case V4L2_MPEG_VIDEO_MPEG2_PROFILE_MULTIVIEW:
+      return "multiview";
+    default:
+      GST_WARNING ("Unsupported V4L2 profile %i", v4l2_profile);
+      break;
+  }
+
+  return NULL;
+}
+
+static gint
+v4l2_level_from_string (const gchar * level)
+{
+  gint v4l2_level = -1;
+
+  if (g_str_equal (level, "low"))
+    v4l2_level = V4L2_MPEG_VIDEO_MPEG2_LEVEL_LOW;
+  else if (g_str_equal (level, "main"))
+    v4l2_level = V4L2_MPEG_VIDEO_MPEG2_LEVEL_MAIN;
+  else if (g_str_equal (level, "high-1440"))
+    v4l2_level = V4L2_MPEG_VIDEO_MPEG2_LEVEL_HIGH_1440;
+  else if (g_str_equal (level, "high"))
+    v4l2_level = V4L2_MPEG_VIDEO_MPEG2_LEVEL_HIGH;
+  else
+    GST_WARNING ("Unsupported level '%s'", level);
+
+  return v4l2_level;
+}
+
+static const gchar *
+v4l2_level_to_string (gint v4l2_level)
+{
+  switch (v4l2_level) {
+    case V4L2_MPEG_VIDEO_MPEG2_LEVEL_LOW:
+      return "low";
+    case V4L2_MPEG_VIDEO_MPEG2_LEVEL_MAIN:
+      return "main";
+    case V4L2_MPEG_VIDEO_MPEG2_LEVEL_HIGH_1440:
+      return "high-1440";
+    case V4L2_MPEG_VIDEO_MPEG2_LEVEL_HIGH:
+      return "high";
+    default:
+      GST_WARNING ("Unsupported V4L2 level %i", v4l2_level);
+      break;
+  }
+
+  return NULL;
+}
+
+const GstV4l2Codec *
+gst_v4l2_mpeg2_get_codec (void)
+{
+  static GstV4l2Codec *codec = NULL;
+  if (g_once_init_enter (&codec)) {
+    static GstV4l2Codec c;
+    c.profile_cid = V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE;
+    c.profile_to_string = v4l2_profile_to_string;
+    c.profile_from_string = v4l2_profile_from_string;
+    c.level_cid = V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL;
+    c.level_to_string = v4l2_level_to_string;
+    c.level_from_string = v4l2_level_from_string;
+    g_once_init_leave (&codec, &c);
+  }
+  return codec;
+}

diff --git a/sys/v4l2/gstv4l2mpeg2codec.h b/sys/v4l2/gstv4l2mpeg2codec.h
new file mode 100644 (file)
index 0000000..9adfd40
--- /dev/null
+++ b/sys/v4l2/gstv4l2mpeg2codec.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2019 Philipp Zabel <philipp.zabel@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef __GST_V4L2_MPEG2_CODEC_H__
+#define __GST_V4L2_MPEG2_CODEC_H__
+
+#include "gstv4l2codec.h"
+
+G_BEGIN_DECLS
+
+const GstV4l2Codec * gst_v4l2_mpeg2_get_codec (void);
+
+G_END_DECLS
+
+#endif

diff --git a/sys/v4l2/gstv4l2videodec.c b/sys/v4l2/gstv4l2videodec.c
index 85f3ee6674465ceb33c95ccee453759201303df6..4e50c841c93b9b440a0e881d94d7764d2b80f266 100644 (file)
--- a/sys/v4l2/gstv4l2videodec.c
+++ b/sys/v4l2/gstv4l2videodec.c
@@ -34,6 +34,7 @@
 
 #include "gstv4l2h264codec.h"
 #include "gstv4l2h265codec.h"
+#include "gstv4l2mpeg2codec.h"
 #include "gstv4l2mpeg4codec.h"
 #include "gstv4l2vp8codec.h"
 #include "gstv4l2vp9codec.h"
@@ -1085,6 +1086,7 @@ G_STMT_START { \
 
     if (mpegversion == 2) {
       SET_META ("MPEG2");
+      cdata->codec = gst_v4l2_mpeg2_get_codec ();
     } else {
       SET_META ("MPEG4");
       cdata->codec = gst_v4l2_mpeg4_get_codec ();

diff --git a/sys/v4l2/meson.build b/sys/v4l2/meson.build
index bae955a3d6fde56427a46f6f2ae3d36939d14248..a1222f0d949c9b1192eb7b715c41faaf5d55dcc4 100644 (file)
--- a/sys/v4l2/meson.build
+++ b/sys/v4l2/meson.build
@@ -20,6 +20,7 @@ v4l2_sources = [
   'gstv4l2h265codec.c',
   'gstv4l2h265enc.c',
   'gstv4l2jpegenc.c',
+  'gstv4l2mpeg2codec.c',
   'gstv4l2mpeg4codec.c',
   'gstv4l2mpeg4enc.c',
   'gstv4l2vidorient.c',