gstdecode: handle fourcc mismatch between gst vlc

Add raw video fourcc conversion support to convert
from gstreamer representation (for strings that are
not equal to length 4) to vlc representation.

Signed-off-by: Thomas Guillem <thomas@gllm.fr>
(cherry picked from commit a6c52d8943)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/codec/Makefile.am

@@ -633,7 +633,8 @@ libgstdecode_plugin_la_SOURCES = codec/gstreamer/gstdecode.c \
 								 codec/gstreamer/gstvlcvideopool.c \
 								 codec/gstreamer/gstvlcvideopool.h \
 								 codec/gstreamer/gstvlcvideosink.c \
-								 codec/gstreamer/gstvlcvideosink.h
+								 codec/gstreamer/gstvlcvideosink.h \
+								 codec/gstreamer/fourcc.c
 libgstdecode_plugin_la_CFLAGS = $(AM_CFLAGS) $(GST_VIDEO_CFLAGS) $(GST_APP_CFLAGS)
 libgstdecode_plugin_la_LIBADD = $(GST_VIDEO_LIBS) $(GST_APP_LIBS)
 if HAVE_GST_DECODE

modules/codec/gstreamer/fourcc.c

@@ -0,0 +1,94 @@
+
+/*****************************************************************************
+ * fourcc.c: convert between gst <->  vlc formats
+ *****************************************************************************
+ * Copyright (C) 2020 VLC authors and VideoLAN
+ *
+ * Author: Vikram Fugro <vikram.fugro@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 2.1 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
+ * Lesser 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 Street, Fifth Floor, Boston, MA  02110-1301 USA
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <vlc_common.h>
+#include <vlc_codec.h>
+
+vlc_fourcc_t GetGstVLCFourcc( const char* gst );
+
+typedef struct
+{
+    char gst [10];
+    vlc_fourcc_t i_fourcc;
+} gst_vlc_rawvideo_fourcc;
+
+/*
+ * Raw Video Formats
+ */
+static const gst_vlc_rawvideo_fourcc raw_video_fmts[] =
+{
+    // NOTE: These should be sorted entries, keyed by `gst` field
+    // cat entries | tr -dc "[:alnum:][:space:]_" | sort -n -k1 | xargs printf "{ \"%s\", %s },\n"
+    { "I420_10BE", VLC_CODEC_I420_10B },
+    { "I420_10LE", VLC_CODEC_I420_10L },
+    { "I420_12BE", VLC_CODEC_I420_12B },
+    { "I420_12LE", VLC_CODEC_I420_12L },
+    { "I420_16BE", VLC_CODEC_I420_16B },
+    { "I420_16LE", VLC_CODEC_I420_16L },
+    { "I420_9BE", VLC_CODEC_I420_9B },
+    { "I420_9LE", VLC_CODEC_I420_9L },
+    { "I422_10BE", VLC_CODEC_I422_10B },
+    { "I422_10LE", VLC_CODEC_I422_10L },
+    { "I422_12BE", VLC_CODEC_I422_12B },
+    { "I422_12LE", VLC_CODEC_I422_12L },
+//    { "I422_16BE", VLC_CODEC_I422_16B },
+//    { "I422_16LE", VLC_CODEC_I422_16L },
+    { "I422_9BE", VLC_CODEC_I422_9B },
+    { "I422_9LE", VLC_CODEC_I422_9L },
+    { "I444_10BE", VLC_CODEC_I444_10B },
+    { "I444_10LE", VLC_CODEC_I444_10L },
+    { "I444_12BE", VLC_CODEC_I444_12B },
+    { "I444_12LE", VLC_CODEC_I444_12L },
+    { "I444_16BE", VLC_CODEC_I444_16B },
+    { "I444_16LE", VLC_CODEC_I444_16L },
+    { "I444_9BE", VLC_CODEC_I444_9B },
+    { "I444_9LE", VLC_CODEC_I444_9L },
+};
+
+static int compare_func( const void* key, const void* ent )
+{
+    return strcmp( (char*)key, ((gst_vlc_rawvideo_fourcc*)ent)->gst );
+}
+
+vlc_fourcc_t GetGstVLCFourcc( const char* gst )
+{
+    gst_vlc_rawvideo_fourcc* found = NULL;
+
+    if( !gst )
+    {
+        return VLC_CODEC_UNKNOWN;
+    }
+
+    found = bsearch( gst, raw_video_fmts,
+                ARRAY_SIZE(raw_video_fmts), sizeof(gst_vlc_rawvideo_fourcc),
+                compare_func );
+
+    if( !found )
+        return VLC_CODEC_UNKNOWN;
+    else
+        return found->i_fourcc;
+}

modules/codec/gstreamer/gstvlcpictureplaneallocator.c

@@ -30,6 +30,9 @@
 
 #include <vlc_common.h>
 
+/* from gstreamer/fourcc.c */
+vlc_fourcc_t GetGstVLCFourcc( const char* );
+
 #define gst_vlc_picture_plane_allocator_parent_class parent_class
 G_DEFINE_TYPE (GstVlcPicturePlaneAllocator, gst_vlc_picture_plane_allocator, \
         GST_TYPE_ALLOCATOR);
@@ -132,6 +135,22 @@ static GstMemory* gst_vlc_picture_plane_copy(
     return NULL;
 }
 
+static vlc_fourcc_t gst_vlc_to_map_format( const char* psz_fourcc )
+{
+    if( !psz_fourcc )
+        return VLC_CODEC_UNKNOWN;
+
+    if( strlen( psz_fourcc ) != 4 )
+    {
+        return GetGstVLCFourcc( psz_fourcc );
+    }
+    else
+    {
+        return vlc_fourcc_GetCodecFromString(
+                VIDEO_ES, psz_fourcc );
+    }
+}
+
 void gst_vlc_picture_plane_allocator_release(
     GstVlcPicturePlaneAllocator *p_allocator, GstBuffer *p_buffer )
 {
@@ -223,10 +242,10 @@ bool gst_vlc_set_vout_fmt( GstVideoInfo *p_info, GstVideoAlignment *p_align,
     vlc_fourcc_t i_chroma;
     int i_padded_width, i_padded_height;
 
-    i_chroma = p_outfmt->i_codec = vlc_fourcc_GetCodecFromString(
-            VIDEO_ES,
-            gst_structure_get_string( p_str, "format" ) );
-    if( !i_chroma )
+    const char* psz_fourcc = gst_structure_get_string( p_str, "format" );
+
+    i_chroma = p_outfmt->i_codec = gst_vlc_to_map_format( psz_fourcc );
+    if( !i_chroma || i_chroma == VLC_CODEC_UNKNOWN )
     {
         msg_Err( p_dec, "video chroma type not supported" );
         return false;