Seperate x264rgb encoder and only enable when its actually supported

This avoids enabling and building the x264rgb encoder when its actually not supported and
thus would not work
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

configure

@@ -2768,7 +2768,7 @@ libwebp_encoder_deps="libwebp"
 libwebp_anim_encoder_deps="libwebp"
 libx262_encoder_deps="libx262"
 libx264_encoder_deps="libx264"
-libx264rgb_encoder_deps="libx264"
+libx264rgb_encoder_deps="libx264 x264_csp_bgr"
 libx264rgb_encoder_select="libx264_encoder"
 libx265_encoder_deps="libx265"
 libxavs_encoder_deps="libxavs"
@@ -5393,6 +5393,7 @@ check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwai
 check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
 check_builtin gmtime_r time.h "time_t *time; struct tm *tm; gmtime_r(time, tm)"
 check_builtin localtime_r time.h "time_t *time; struct tm *tm; localtime_r(time, tm)"
+check_builtin x264_csp_bgr "stdint.h x264.h" "X264_CSP_BGR"
 
 case "$custom_allocator" in
     jemalloc)

libavcodec/libx264.c

@@ -442,7 +442,7 @@ static int convert_pix_fmt(enum AVPixelFormat pix_fmt)
     case AV_PIX_FMT_YUVJ444P:
     case AV_PIX_FMT_YUV444P9:
     case AV_PIX_FMT_YUV444P10: return X264_CSP_I444;
-#ifdef X264_CSP_BGR
+#if CONFIG_LIBX264RGB_ENCODER
     case AV_PIX_FMT_BGR0:
         return X264_CSP_BGRA;
     case AV_PIX_FMT_BGR24:
@@ -896,14 +896,14 @@ static const enum AVPixelFormat pix_fmts_10bit[] = {
     AV_PIX_FMT_NV20,
     AV_PIX_FMT_NONE
 };
+#if CONFIG_LIBX264RGB_ENCODER
 static const enum AVPixelFormat pix_fmts_8bit_rgb[] = {
-#ifdef X264_CSP_BGR
     AV_PIX_FMT_BGR0,
     AV_PIX_FMT_BGR24,
     AV_PIX_FMT_RGB24,
-#endif
     AV_PIX_FMT_NONE
 };
+#endif
 
 static av_cold void X264_init_static(AVCodec *codec)
 {
@@ -1047,13 +1047,6 @@ static const AVClass x264_class = {
     .version    = LIBAVUTIL_VERSION_INT,
 };
 
-static const AVClass rgbclass = {
-    .class_name = "libx264rgb",
-    .item_name  = av_default_item_name,
-    .option     = options,
-    .version    = LIBAVUTIL_VERSION_INT,
-};
-
 AVCodec ff_libx264_encoder = {
     .name             = "libx264",
     .long_name        = NULL_IF_CONFIG_SMALL("libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
@@ -1070,6 +1063,15 @@ AVCodec ff_libx264_encoder = {
     .caps_internal    = FF_CODEC_CAP_INIT_THREADSAFE |
                         FF_CODEC_CAP_INIT_CLEANUP,
 };
+#endif
+
+#if CONFIG_LIBX264RGB_ENCODER
+static const AVClass rgbclass = {
+    .class_name = "libx264rgb",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
 
 AVCodec ff_libx264rgb_encoder = {
     .name           = "libx264rgb",

libavcodec/version.h

@@ -29,7 +29,7 @@
 
 #define LIBAVCODEC_VERSION_MAJOR  57
 #define LIBAVCODEC_VERSION_MINOR  44
-#define LIBAVCODEC_VERSION_MICRO 100
+#define LIBAVCODEC_VERSION_MICRO 101
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \