mpeg12: add 'scan_offset' private option.

Deprecate CODEC_FLAG_SVCD_SCAN_OFFSET

libavcodec/avcodec.h

@@ -613,7 +613,9 @@ typedef struct RcOverride{
 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
 #endif
 #define CODEC_FLAG_INTERLACED_ME  0x20000000 ///< interlaced motion estimation
+#if FF_API_MPEGVIDEO_GLOBAL_OPTS
 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< Will reserve space for SVCD scan offset user data.
+#endif
 #define CODEC_FLAG_CLOSED_GOP     0x80000000
 #define CODEC_FLAG2_FAST          0x00000001 ///< Allow non spec compliant speedup tricks.
 #define CODEC_FLAG2_STRICT_GOP    0x00000002 ///< Strictly enforce GOP size.

libavcodec/mpeg12enc.c

@@ -145,6 +145,8 @@ static av_cold int encode_init(AVCodecContext *avctx)
 #if FF_API_MPEGVIDEO_GLOBAL_OPTS
     if (avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE)
         s->drop_frame_timecode = 1;
+    if (avctx->flags & CODEC_FLAG_SVCD_SCAN_OFFSET)
+        s->scan_offset = 1;
 #endif
 
     if(find_frame_rate_index(s) < 0){
@@ -420,7 +422,7 @@ void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
         put_bits(&s->pb, 1, s->progressive_frame);
         put_bits(&s->pb, 1, 0); //composite_display_flag
     }
-    if(s->flags & CODEC_FLAG_SVCD_SCAN_OFFSET){
+    if (s->scan_offset) {
         int i;
 
         put_header(s, USER_START_CODE);
@@ -936,7 +938,8 @@ static void mpeg1_encode_block(MpegEncContext *s,
 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
 #define COMMON_OPTS\
     { "intra_vlc",           "Use MPEG-2 intra VLC table.",       OFFSET(intra_vlc_format),    FF_OPT_TYPE_INT, { 0 }, 0, 1, VE },\
-    { "drop_frame_timecode", "Timecode is in drop frame format.", OFFSET(drop_frame_timecode), FF_OPT_TYPE_INT, { 0 }, 0, 1, VE},
+    { "drop_frame_timecode", "Timecode is in drop frame format.", OFFSET(drop_frame_timecode), FF_OPT_TYPE_INT, { 0 }, 0, 1, VE}, \
+    { "scan_offset",         "Reserve space for SVCD scan offset user data.", OFFSET(scan_offset), FF_OPT_TYPE_INT, { 0 }, 0, 1, VE },
 
 static const AVOption mpeg1_options[] = {
     COMMON_OPTS

libavcodec/mpegvideo.h

@@ -645,6 +645,7 @@ typedef struct MpegEncContext {
     int first_slice;
     int first_field;         ///< is 1 for the first field of a field picture 0 otherwise
     int drop_frame_timecode; ///< timecode is in drop frame format.
+    int scan_offset;         ///< reserve space for SVCD scan offset user data.
 
     /* RTP specific */
     int rtp_mode;

libavcodec/options.c

@@ -115,7 +115,9 @@ static const AVOption options[]={
 {"slice", NULL, 0, FF_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_H263P_SLICE_STRUCT }, INT_MIN, INT_MAX, V|E, "flags"},
 #endif
 {"ilme", "interlaced motion estimation", 0, FF_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_INTERLACED_ME }, INT_MIN, INT_MAX, V|E, "flags"},
+#if FF_API_MPEGVIDEO_GLOBAL_OPTS
 {"scan_offset", "will reserve space for svcd scan offset user data", 0, FF_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_SVCD_SCAN_OFFSET }, INT_MIN, INT_MAX, V|E, "flags"},
+#endif
 {"cgop", "closed gop", 0, FF_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_CLOSED_GOP }, INT_MIN, INT_MAX, V|E, "flags"},
 {"fast", "allow non spec compliant speedup tricks", 0, FF_OPT_TYPE_CONST, {.dbl = CODEC_FLAG2_FAST }, INT_MIN, INT_MAX, V|E, "flags2"},
 {"sgop", "strictly enforce gop size", 0, FF_OPT_TYPE_CONST, {.dbl = CODEC_FLAG2_STRICT_GOP }, INT_MIN, INT_MAX, V|E, "flags2"},