avcodec/snowenc: add FF_MPV_COMMON_OPTS

This fixes the ratecontrol code with snow
adding FF_MPV_COMMON_OPTS is needed as the generic rate control options
are currently in the (unrelated) MpegEncContext
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/mpegvideo.h

@@ -694,7 +694,9 @@ typedef struct MpegEncContext {
 #define FF_MPV_FLAG_NAQ          0x0010
 #define FF_MPV_FLAG_MV0          0x0020
 
+#ifndef FF_MPV_OFFSET
 #define FF_MPV_OFFSET(x) offsetof(MpegEncContext, x)
+#endif
 #define FF_MPV_OPT_FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
 #define FF_MPV_COMMON_OPTS \
 { "mpv_flags",      "Flags common for all mpegvideo-based encoders.", FF_MPV_OFFSET(mpv_flags), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "mpv_flags" },\

libavcodec/snow.h

@@ -29,6 +29,8 @@
 
 #include "rangecoder.h"
 #include "mathops.h"
+
+#define FF_MPV_OFFSET(x) (offsetof(MpegEncContext, x) + offsetof(SnowContext, m))
 #include "mpegvideo.h"
 #include "h264qpel.h"
 

libavcodec/snowenc.c

@@ -29,6 +29,7 @@
 #include "rangecoder.h"
 #include "mathops.h"
 
+#define FF_MPV_OFFSET(x) (offsetof(MpegEncContext, x) + offsetof(SnowContext, m))
 #include "mpegvideo.h"
 #include "h263.h"
 
@@ -1870,6 +1871,7 @@ static av_cold int encode_end(AVCodecContext *avctx)
 #define OFFSET(x) offsetof(SnowContext, x)
 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
 static const AVOption options[] = {
+    FF_MPV_COMMON_OPTS
     { "memc_only",      "Only do ME/MC (I frames -> ref, P frame -> ME+MC).",   OFFSET(memc_only), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
     { "no_bitstream",   "Skip final bitstream writeout.",                    OFFSET(no_bitstream), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
     { NULL },