lavc: Move timecode_frame_start to codec private options

This option is only used by mpeg2.
It is a very codec-specific option, so deprecate the global variant.
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

libavcodec/avcodec.h

@@ -2398,12 +2398,11 @@ typedef struct AVCodecContext {
      */
     int max_prediction_order;
 
-    /**
-     * GOP timecode frame start number, in non drop frame format
-     * - encoding: Set by user.
-     * - decoding: unused
-     */
+#if FF_API_PRIVATE_OPT
+    /** @deprecated use encoder private options instead */
+    attribute_deprecated
     int64_t timecode_frame_start;
+#endif
 
 #if FF_API_RTP_CALLBACK
     /**

libavcodec/mpeg12enc.c

@@ -182,6 +182,13 @@ static av_cold int encode_init(AVCodecContext *avctx)
         return -1;
     }
 
+#if FF_API_PRIVATE_OPT
+FF_DISABLE_DEPRECATION_WARNINGS
+    if (avctx->timecode_frame_start)
+        s->timecode_frame_start = avctx->timecode_frame_start;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+
     return 0;
 }
 
@@ -307,7 +314,7 @@ static void mpeg1_encode_sequence_header(MpegEncContext *s)
          * fake MPEG frame rate in case of low frame rate */
         fps       = (framerate.num + framerate.den / 2) / framerate.den;
         time_code = s->current_picture_ptr->f->coded_picture_number +
-                    s->avctx->timecode_frame_start;
+                    s->timecode_frame_start;
 
         s->gop_picture_number = s->current_picture_ptr->f->coded_picture_number;
         if (s->drop_frame_timecode) {
@@ -1050,7 +1057,9 @@ av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
     { "drop_frame_timecode", "Timecode is in drop frame format.",             \
       OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
     { "scan_offset",         "Reserve space for SVCD scan offset user data.", \
-      OFFSET(scan_offset),         AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
+      OFFSET(scan_offset),         AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
+    { "timecode_frame_start", "GOP timecode frame start number, in non-drop-frame format", \
+      OFFSET(timecode_frame_start), AV_OPT_TYPE_INT64, {.i64 = 0 }, 0, INT64_MAX, VE}, \
 
 static const AVOption mpeg1_options[] = {
     COMMON_OPTS

libavcodec/mpegvideo.h

@@ -439,6 +439,7 @@ typedef struct MpegEncContext {
     // picture structure defines are loaded from mpegutils.h
     int picture_structure;
 
+    int64_t timecode_frame_start; ///< GOP timecode frame start number, in non drop frame format
     int intra_dc_precision;
     int frame_pred_frame_dct;
     int top_field_first;

libavcodec/options_table.h

@@ -412,7 +412,9 @@ static const AVOption avcodec_options[] = {
 {"compression_level", NULL, OFFSET(compression_level), AV_OPT_TYPE_INT, {.i64 = FF_COMPRESSION_DEFAULT }, INT_MIN, INT_MAX, V|A|E},
 {"min_prediction_order", NULL, OFFSET(min_prediction_order), AV_OPT_TYPE_INT, {.i64 = -1 }, INT_MIN, INT_MAX, A|E},
 {"max_prediction_order", NULL, OFFSET(max_prediction_order), AV_OPT_TYPE_INT, {.i64 = -1 }, INT_MIN, INT_MAX, A|E},
+#if FF_API_PRIVATE_OPT
 {"timecode_frame_start", "GOP timecode frame start number, in non-drop-frame format", OFFSET(timecode_frame_start), AV_OPT_TYPE_INT64, {.i64 = 0 }, 0, INT64_MAX, V|E},
+#endif
 {"bits_per_raw_sample", NULL, OFFSET(bits_per_raw_sample), AV_OPT_TYPE_INT, {.i64 = DEFAULT }, INT_MIN, INT_MAX},
 {"channel_layout", NULL, OFFSET(channel_layout), AV_OPT_TYPE_INT64, {.i64 = DEFAULT }, 0, INT64_MAX, A|E|D, "channel_layout"},
 {"request_channel_layout", NULL, OFFSET(request_channel_layout), AV_OPT_TYPE_INT64, {.i64 = DEFAULT }, 0, INT64_MAX, A|D, "request_channel_layout"},