---
libavcodec/mpegvideo.c | 24 ++++++++++++++++++++++++
libavcodec/mpegvideo.h | 1 +
2 files changed, 25 insertions(+), 0 deletions(-)
diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index 9280ab8..9e68022 100644
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@@ -398,6 +398,30 @@ void MPV_update_picture_pointers(MpegEncContext *dst, MpegEncContext *src){
}
}
+int ff_mpeg_update_context(AVCodecContext *dst, AVCodecContext *src)
+{
+ MpegEncContext *s = dst->priv_data, *s1 = src->priv_data;
+
+ if (!s1->context_initialized) return 0;
+
+ //FIXME can parameters change on I-frames? in that case dst may need a reinit
+ if (!s->context_initialized) {
+ memcpy(s, s1, sizeof(MpegEncContext));
+
+ s->avctx = dst;
+ s->picture_range_start += MAX_PICTURE_COUNT;
+ s->picture_range_end += MAX_PICTURE_COUNT;
+ s->bitstream_buffer = NULL;
+ s->bitstream_buffer_size = s->allocated_bitstream_buffer_size = 0;
+
+ MPV_common_init(s);
+ }
+
+ MPV_update_picture_pointers(s, s1);
+
+ return 0;
+}
+
/**
* sets the given MpegEncContext to common defaults (same for encoding and decoding).
* the changed fields will not depend upon the prior state of the MpegEncContext.
diff --git a/libavcodec/mpegvideo.h b/libavcodec/mpegvideo.h
index b9b258d..497a6fa 100644
--- a/libavcodec/mpegvideo.h
+++ b/libavcodec/mpegvideo.h
@@ -695,6 +695,7 @@ void ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
void MPV_update_picture_pointers(MpegEncContext *dst, MpegEncContext *src);
int MPV_lowest_referenced_row(MpegEncContext *s, int dir);
void MPV_report_decode_progress(MpegEncContext *s);
+int ff_mpeg_update_context(AVCodecContext *dst, AVCodecContext *src);
const uint8_t *ff_find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state);
void ff_er_frame_start(MpegEncContext *s);
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