diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 4122a9b144..b12638da5e 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -209,10 +209,10 @@ OBJS-$(CONFIG_APNG_DECODER)            += png.o pngdec.o pngdsp.o
 OBJS-$(CONFIG_APNG_ENCODER)            += png.o pngenc.o
 OBJS-$(CONFIG_ARBC_DECODER)            += arbc.o
 OBJS-$(CONFIG_ARGO_DECODER)            += argo.o
-OBJS-$(CONFIG_SSA_DECODER)             += assdec.o ass.o
-OBJS-$(CONFIG_SSA_ENCODER)             += assenc.o ass.o
-OBJS-$(CONFIG_ASS_DECODER)             += assdec.o ass.o
-OBJS-$(CONFIG_ASS_ENCODER)             += assenc.o ass.o
+OBJS-$(CONFIG_SSA_DECODER)             += assdec.o
+OBJS-$(CONFIG_SSA_ENCODER)             += assenc.o
+OBJS-$(CONFIG_ASS_DECODER)             += assdec.o
+OBJS-$(CONFIG_ASS_ENCODER)             += assenc.o
 OBJS-$(CONFIG_ASV1_DECODER)            += asvdec.o asv.o mpeg12data.o
 OBJS-$(CONFIG_ASV1_ENCODER)            += asvenc.o asv.o mpeg12data.o
 OBJS-$(CONFIG_ASV2_DECODER)            += asvdec.o asv.o mpeg12data.o
@@ -253,7 +253,7 @@ OBJS-$(CONFIG_BRENDER_PIX_DECODER)     += brenderpix.o
 OBJS-$(CONFIG_C93_DECODER)             += c93.o
 OBJS-$(CONFIG_CAVS_DECODER)            += cavs.o cavsdec.o cavsdsp.o \
                                           cavsdata.o
-OBJS-$(CONFIG_CCAPTION_DECODER)        += ccaption_dec.o ass.o
+OBJS-$(CONFIG_CCAPTION_DECODER)        += ccaption_dec.o
 OBJS-$(CONFIG_CDGRAPHICS_DECODER)      += cdgraphics.o
 OBJS-$(CONFIG_CDTOONS_DECODER)         += cdtoons.o
 OBJS-$(CONFIG_CDXL_DECODER)            += cdxl.o
@@ -425,7 +425,7 @@ OBJS-$(CONFIG_INTERPLAY_ACM_DECODER)   += interplayacm.o
 OBJS-$(CONFIG_INTERPLAY_DPCM_DECODER)  += dpcm.o
 OBJS-$(CONFIG_INTERPLAY_VIDEO_DECODER) += interplayvideo.o
 OBJS-$(CONFIG_IPU_DECODER)             += mpeg12dec.o mpeg12.o mpeg12data.o
-OBJS-$(CONFIG_JACOSUB_DECODER)         += jacosubdec.o ass.o
+OBJS-$(CONFIG_JACOSUB_DECODER)         += jacosubdec.o
 OBJS-$(CONFIG_JPEG2000_ENCODER)        += j2kenc.o mqcenc.o mqc.o jpeg2000.o \
                                           jpeg2000dwt.o
 OBJS-$(CONFIG_JPEG2000_DECODER)        += jpeg2000dec.o jpeg2000.o jpeg2000dsp.o \
@@ -447,7 +447,7 @@ OBJS-$(CONFIG_MAGICYUV_ENCODER)        += magicyuvenc.o
 OBJS-$(CONFIG_MDEC_DECODER)            += mdec.o mpeg12.o mpeg12data.o
 OBJS-$(CONFIG_METASOUND_DECODER)       += metasound.o metasound_data.o \
                                           twinvq.o
-OBJS-$(CONFIG_MICRODVD_DECODER)        += microdvddec.o ass.o
+OBJS-$(CONFIG_MICRODVD_DECODER)        += microdvddec.o
 OBJS-$(CONFIG_MIMIC_DECODER)           += mimic.o
 OBJS-$(CONFIG_MJPEG_DECODER)           += mjpegdec.o mjpegdec_common.o
 OBJS-$(CONFIG_MJPEG_QSV_DECODER)       += qsvdec.o
@@ -462,8 +462,8 @@ OBJS-$(CONFIG_MLP_ENCODER)             += mlpenc.o mlp.o
 OBJS-$(CONFIG_MMVIDEO_DECODER)         += mmvideo.o
 OBJS-$(CONFIG_MOBICLIP_DECODER)        += mobiclip.o
 OBJS-$(CONFIG_MOTIONPIXELS_DECODER)    += motionpixels.o
-OBJS-$(CONFIG_MOVTEXT_DECODER)         += movtextdec.o ass.o
-OBJS-$(CONFIG_MOVTEXT_ENCODER)         += movtextenc.o ass_split.o
+OBJS-$(CONFIG_MOVTEXT_DECODER)         += movtextdec.o
+OBJS-$(CONFIG_MOVTEXT_ENCODER)         += movtextenc.o
 OBJS-$(CONFIG_MP1_DECODER)             += mpegaudiodec_fixed.o
 OBJS-$(CONFIG_MP1FLOAT_DECODER)        += mpegaudiodec_float.o
 OBJS-$(CONFIG_MP2_DECODER)             += mpegaudiodec_fixed.o
@@ -502,7 +502,7 @@ OBJS-$(CONFIG_MPEG4_MEDIACODEC_DECODER) += mediacodecdec.o
 OBJS-$(CONFIG_MPEG4_OMX_ENCODER)       += omx.o
 OBJS-$(CONFIG_MPEG4_V4L2M2M_DECODER)   += v4l2_m2m_dec.o
 OBJS-$(CONFIG_MPEG4_V4L2M2M_ENCODER)   += v4l2_m2m_enc.o
-OBJS-$(CONFIG_MPL2_DECODER)            += mpl2dec.o ass.o
+OBJS-$(CONFIG_MPL2_DECODER)            += mpl2dec.o
 OBJS-$(CONFIG_MSA1_DECODER)            += mss3.o
 OBJS-$(CONFIG_MSCC_DECODER)            += mscc.o
 OBJS-$(CONFIG_MSMPEG4V1_DECODER)       += msmpeg4dec.o msmpeg4.o msmpeg4data.o
@@ -555,7 +555,7 @@ OBJS-$(CONFIG_PGX_DECODER)             += pgxdec.o
 OBJS-$(CONFIG_PHOTOCD_DECODER)         += photocd.o
 OBJS-$(CONFIG_PICTOR_DECODER)          += pictordec.o cga_data.o
 OBJS-$(CONFIG_PIXLET_DECODER)          += pixlet.o
-OBJS-$(CONFIG_PJS_DECODER)             += textdec.o ass.o
+OBJS-$(CONFIG_PJS_DECODER)             += textdec.o
 OBJS-$(CONFIG_PNG_DECODER)             += png.o pngdec.o pngdsp.o
 OBJS-$(CONFIG_PNG_ENCODER)             += png.o pngenc.o
 OBJS-$(CONFIG_PPM_DECODER)             += pnmdec.o pnm.o
@@ -587,7 +587,7 @@ OBJS-$(CONFIG_RALF_DECODER)            += ralf.o
 OBJS-$(CONFIG_RASC_DECODER)            += rasc.o
 OBJS-$(CONFIG_RAWVIDEO_DECODER)        += rawdec.o
 OBJS-$(CONFIG_RAWVIDEO_ENCODER)        += rawenc.o
-OBJS-$(CONFIG_REALTEXT_DECODER)        += realtextdec.o ass.o
+OBJS-$(CONFIG_REALTEXT_DECODER)        += realtextdec.o
 OBJS-$(CONFIG_RL2_DECODER)             += rl2.o
 OBJS-$(CONFIG_ROQ_DECODER)             += roqvideodec.o roqvideo.o
 OBJS-$(CONFIG_ROQ_ENCODER)             += roqvideoenc.o roqvideo.o elbg.o
@@ -602,7 +602,7 @@ OBJS-$(CONFIG_RV20_DECODER)            += rv10.o
 OBJS-$(CONFIG_RV20_ENCODER)            += rv20enc.o
 OBJS-$(CONFIG_RV30_DECODER)            += rv30.o rv34.o rv30dsp.o
 OBJS-$(CONFIG_RV40_DECODER)            += rv40.o rv34.o rv40dsp.o
-OBJS-$(CONFIG_SAMI_DECODER)            += samidec.o ass.o htmlsubtitles.o
+OBJS-$(CONFIG_SAMI_DECODER)            += samidec.o htmlsubtitles.o
 OBJS-$(CONFIG_S302M_DECODER)           += s302m.o
 OBJS-$(CONFIG_S302M_ENCODER)           += s302menc.o
 OBJS-$(CONFIG_SANM_DECODER)            += sanm.o
@@ -637,13 +637,13 @@ OBJS-$(CONFIG_SPEEDHQ_ENCODER)         += speedhq.o mpeg12data.o mpeg12enc.o spe
 OBJS-$(CONFIG_SPEEX_DECODER)           += speexdec.o
 OBJS-$(CONFIG_SP5X_DECODER)            += sp5xdec.o
 OBJS-$(CONFIG_SRGC_DECODER)            += mscc.o
-OBJS-$(CONFIG_SRT_DECODER)             += srtdec.o ass.o htmlsubtitles.o
-OBJS-$(CONFIG_SRT_ENCODER)             += srtenc.o ass_split.o
-OBJS-$(CONFIG_STL_DECODER)             += textdec.o ass.o
-OBJS-$(CONFIG_SUBRIP_DECODER)          += srtdec.o ass.o htmlsubtitles.o
-OBJS-$(CONFIG_SUBRIP_ENCODER)          += srtenc.o ass_split.o
-OBJS-$(CONFIG_SUBVIEWER1_DECODER)      += textdec.o ass.o
-OBJS-$(CONFIG_SUBVIEWER_DECODER)       += subviewerdec.o ass.o
+OBJS-$(CONFIG_SRT_DECODER)             += srtdec.o htmlsubtitles.o
+OBJS-$(CONFIG_SRT_ENCODER)             += srtenc.o
+OBJS-$(CONFIG_STL_DECODER)             += textdec.o
+OBJS-$(CONFIG_SUBRIP_DECODER)          += srtdec.o htmlsubtitles.o
+OBJS-$(CONFIG_SUBRIP_ENCODER)          += srtenc.o
+OBJS-$(CONFIG_SUBVIEWER1_DECODER)      += textdec.o
+OBJS-$(CONFIG_SUBVIEWER_DECODER)       += subviewerdec.o
 OBJS-$(CONFIG_SUNRAST_DECODER)         += sunrast.o
 OBJS-$(CONFIG_SUNRAST_ENCODER)         += sunrastenc.o
 OBJS-$(CONFIG_LIBRSVG_DECODER)         += librsvgdec.o
@@ -653,8 +653,8 @@ OBJS-$(CONFIG_SVQ1_DECODER)            += svq1dec.o svq1.o h263data.o
 OBJS-$(CONFIG_SVQ1_ENCODER)            += svq1enc.o svq1.o  h263data.o  \
                                           h263.o ituh263enc.o
 OBJS-$(CONFIG_SVQ3_DECODER)            += svq3.o mpegutils.o h264data.o
-OBJS-$(CONFIG_TEXT_DECODER)            += textdec.o ass.o
-OBJS-$(CONFIG_TEXT_ENCODER)            += srtenc.o ass_split.o
+OBJS-$(CONFIG_TEXT_DECODER)            += textdec.o
+OBJS-$(CONFIG_TEXT_ENCODER)            += srtenc.o
 OBJS-$(CONFIG_TAK_DECODER)             += takdec.o tak.o takdsp.o
 OBJS-$(CONFIG_TARGA_DECODER)           += targa.o
 OBJS-$(CONFIG_TARGA_ENCODER)           += targaenc.o rle.o
@@ -674,7 +674,7 @@ OBJS-$(CONFIG_TSCC_DECODER)            += tscc.o msrledec.o
 OBJS-$(CONFIG_TSCC2_DECODER)           += tscc2.o
 OBJS-$(CONFIG_TTA_DECODER)             += tta.o ttadata.o ttadsp.o
 OBJS-$(CONFIG_TTA_ENCODER)             += ttaenc.o ttaencdsp.o ttadata.o
-OBJS-$(CONFIG_TTML_ENCODER)            += ttmlenc.o ass_split.o
+OBJS-$(CONFIG_TTML_ENCODER)            += ttmlenc.o
 OBJS-$(CONFIG_TWINVQ_DECODER)          += twinvqdec.o twinvq.o metasound_data.o
 OBJS-$(CONFIG_TXD_DECODER)             += txd.o
 OBJS-$(CONFIG_ULTI_DECODER)            += ulti.o
@@ -729,15 +729,15 @@ OBJS-$(CONFIG_VP9_MEDIACODEC_DECODER)  += mediacodecdec.o
 OBJS-$(CONFIG_VP9_RKMPP_DECODER)       += rkmppdec.o
 OBJS-$(CONFIG_VP9_VAAPI_ENCODER)       += vaapi_encode_vp9.o
 OBJS-$(CONFIG_VP9_QSV_ENCODER)         += qsvenc_vp9.o
-OBJS-$(CONFIG_VPLAYER_DECODER)         += textdec.o ass.o
+OBJS-$(CONFIG_VPLAYER_DECODER)         += textdec.o
 OBJS-$(CONFIG_VP9_V4L2M2M_DECODER)     += v4l2_m2m_dec.o
 OBJS-$(CONFIG_VQA_DECODER)             += vqavideo.o
 OBJS-$(CONFIG_WAVPACK_DECODER)         += wavpack.o wavpackdata.o dsd.o
 OBJS-$(CONFIG_WAVPACK_ENCODER)         += wavpackdata.o wavpackenc.o
 OBJS-$(CONFIG_WCMV_DECODER)            += wcmv.o
 OBJS-$(CONFIG_WEBP_DECODER)            += webp.o
-OBJS-$(CONFIG_WEBVTT_DECODER)          += webvttdec.o ass.o
-OBJS-$(CONFIG_WEBVTT_ENCODER)          += webvttenc.o ass_split.o
+OBJS-$(CONFIG_WEBVTT_DECODER)          += webvttdec.o
+OBJS-$(CONFIG_WEBVTT_ENCODER)          += webvttenc.o
 OBJS-$(CONFIG_WMALOSSLESS_DECODER)     += wmalosslessdec.o wma_common.o
 OBJS-$(CONFIG_WMAPRO_DECODER)          += wmaprodec.o wma.o wma_common.o
 OBJS-$(CONFIG_WMAV1_DECODER)           += wmadec.o wma.o wma_common.o aactab.o
@@ -1023,7 +1023,7 @@ OBJS-$(CONFIG_PCM_ALAW_AT_ENCODER)        += audiotoolboxenc.o
 OBJS-$(CONFIG_PCM_MULAW_AT_ENCODER)       += audiotoolboxenc.o
 OBJS-$(CONFIG_LIBAOM_AV1_DECODER)         += libaomdec.o
 OBJS-$(CONFIG_LIBAOM_AV1_ENCODER)         += libaomenc.o
-OBJS-$(CONFIG_LIBARIBB24_DECODER)         += libaribb24.o ass.o
+OBJS-$(CONFIG_LIBARIBB24_DECODER)         += libaribb24.o
 OBJS-$(CONFIG_LIBCELT_DECODER)            += libcelt_dec.o
 OBJS-$(CONFIG_LIBCODEC2_DECODER)          += libcodec2.o
 OBJS-$(CONFIG_LIBCODEC2_ENCODER)          += libcodec2.o
@@ -1074,7 +1074,7 @@ OBJS-$(CONFIG_LIBX265_ENCODER)            += libx265.o
 OBJS-$(CONFIG_LIBXAVS_ENCODER)            += libxavs.o
 OBJS-$(CONFIG_LIBXAVS2_ENCODER)           += libxavs2.o
 OBJS-$(CONFIG_LIBXVID_ENCODER)            += libxvid.o
-OBJS-$(CONFIG_LIBZVBI_TELETEXT_DECODER)   += libzvbi-teletextdec.o ass.o
+OBJS-$(CONFIG_LIBZVBI_TELETEXT_DECODER)   += libzvbi-teletextdec.o
 
 # parsers
 OBJS-$(CONFIG_AAC_LATM_PARSER)         += latm_parser.o
diff --git a/libavcodec/ass.h b/libavcodec/ass.h
index 2c260e4e78..9c9cb01c8a 100644
--- a/libavcodec/ass.h
+++ b/libavcodec/ass.h
@@ -1,6 +1,5 @@
 /*
- * SSA/ASS common functions
- * Copyright (c) 2010  Aurelien Jacobs <aurel@gnuage.org>
+ * Copyright (c) 2021 The FFmpeg Project
  *
  * This file is part of FFmpeg.
  *
@@ -23,117 +22,73 @@
 #define AVCODEC_ASS_H
 
 #include "avcodec.h"
-#include "libavutil/bprint.h"
-
-#define ASS_DEFAULT_PLAYRESX 384
-#define ASS_DEFAULT_PLAYRESY 288
-
-/**
- * @name Default values for ASS style
- * @{
- */
-#define ASS_DEFAULT_FONT        "Arial"
-#define ASS_DEFAULT_FONT_SIZE   16
-#define ASS_DEFAULT_COLOR       0xffffff
-#define ASS_DEFAULT_BACK_COLOR  0
-#define ASS_DEFAULT_BOLD        0
-#define ASS_DEFAULT_ITALIC      0
-#define ASS_DEFAULT_UNDERLINE   0
-#define ASS_DEFAULT_ALIGNMENT   2
-#define ASS_DEFAULT_BORDERSTYLE 1
-/** @} */
+#include "libavutil/ass_internal.h"
 
 typedef struct FFASSDecoderContext {
     int readorder;
 } FFASSDecoderContext;
 
-/**
- * Generate a suitable AVCodecContext.subtitle_header for SUBTITLE_ASS.
- * Can specify all fields explicitly
- *
- * @param avctx pointer to the AVCodecContext
- * @param play_res_x subtitle frame width
- * @param play_res_y subtitle frame height
- * @param font name of the default font face to use
- * @param font_size default font size to use
- * @param primary_color default text color to use (ABGR)
- * @param secondary_color default secondary text color to use (ABGR)
- * @param outline_color default outline color to use (ABGR)
- * @param back_color default background color to use (ABGR)
- * @param bold 1 for bold text, 0 for normal text
- * @param italic 1 for italic text, 0 for normal text
- * @param underline 1 for underline text, 0 for normal text
- * @param border_style 1 for outline, 3 for opaque box
- * @param alignment position of the text (left, center, top...), defined after
- *                  the layout of the numpad (1-3 sub, 4-6 mid, 7-9 top)
- * @return >= 0 on success otherwise an error code <0
- */
-int ff_ass_subtitle_header_full(AVCodecContext *avctx,
+static inline int ff_ass_subtitle_header_full(AVCodecContext *avctx,
                                 int play_res_x, int play_res_y,
                                 const char *font, int font_size,
                                 int primary_color, int secondary_color,
                                 int outline_color, int back_color,
                                 int bold, int italic, int underline,
-                                int border_style, int alignment);
-/**
- * Generate a suitable AVCodecContext.subtitle_header for SUBTITLE_ASS.
- *
- * @param avctx pointer to the AVCodecContext
- * @param font name of the default font face to use
- * @param font_size default font size to use
- * @param color default text color to use (ABGR)
- * @param back_color default background color to use (ABGR)
- * @param bold 1 for bold text, 0 for normal text
- * @param italic 1 for italic text, 0 for normal text
- * @param underline 1 for underline text, 0 for normal text
- * @param alignment position of the text (left, center, top...), defined after
- *                  the layout of the numpad (1-3 sub, 4-6 mid, 7-9 top)
- * @return >= 0 on success otherwise an error code <0
- */
-int ff_ass_subtitle_header(AVCodecContext *avctx,
-                           const char *font, int font_size,
-                           int color, int back_color,
-                           int bold, int italic, int underline,
-                           int border_style, int alignment);
+                                int border_style, int alignment)
+{
+    avctx->subtitle_header = (uint8_t *)avpriv_ass_get_subtitle_header_full(
+                                play_res_x, play_res_y, font, font_size,
+                                primary_color, secondary_color, outline_color,
+                                back_color, bold,italic,underline,border_style,alignment,
+                                !(avctx->flags & AV_CODEC_FLAG_BITEXACT));
 
-/**
- * Generate a suitable AVCodecContext.subtitle_header for SUBTITLE_ASS
- * with default style.
- *
- * @param avctx pointer to the AVCodecContext
- * @return >= 0 on success otherwise an error code <0
- */
-int ff_ass_subtitle_header_default(AVCodecContext *avctx);
+    if (!avctx->subtitle_header)
+        return AVERROR(ENOMEM);
+    avctx->subtitle_header_size = strlen((char *)avctx->subtitle_header);
+    return 0;
+}
 
-/**
- * Craft an ASS dialog string.
- */
-char *ff_ass_get_dialog(int readorder, int layer, const char *style,
-                        const char *speaker, const char *text);
+static inline int ff_ass_subtitle_header_default(AVCodecContext *avctx)
+{
+    avctx->subtitle_header = (uint8_t *)avpriv_ass_get_subtitle_header_default(!(avctx->flags & AV_CODEC_FLAG_BITEXACT));
+
+    if (!avctx->subtitle_header)
+        return AVERROR(ENOMEM);
+    avctx->subtitle_header_size = strlen((char *)avctx->subtitle_header);
+    return 0;
+}
+
+static inline void ff_ass_decoder_flush(AVCodecContext *avctx)
+{
+    FFASSDecoderContext *s = avctx->priv_data;
+    if (!(avctx->flags2 & AV_CODEC_FLAG2_RO_FLUSH_NOOP))
+        s->readorder = 0;
+}
 
 /**
  * Add an ASS dialog to a subtitle.
  */
-int ff_ass_add_rect(AVSubtitle *sub, const char *dialog,
+static inline int avpriv_ass_add_rect(AVSubtitle *sub, const char *dialog,
                     int readorder, int layer, const char *style,
-                    const char *speaker);
+                    const char *speaker)
+{
+    char *ass_str;
+    AVSubtitleRect **rects;
 
-/**
- * Helper to flush a text subtitles decoder making use of the
- * FFASSDecoderContext.
- */
-void ff_ass_decoder_flush(AVCodecContext *avctx);
+    rects = av_realloc_array(sub->rects, sub->num_rects+1, sizeof(*sub->rects));
+    if (!rects)
+        return AVERROR(ENOMEM);
+    sub->rects = rects;
+    rects[sub->num_rects]       = av_mallocz(sizeof(*rects[0]));
+    if (!rects[sub->num_rects])
+        return AVERROR(ENOMEM);
+    rects[sub->num_rects]->type = SUBTITLE_ASS;
+    ass_str = avpriv_ass_get_dialog(readorder, layer, style, speaker, dialog);
+    if (!ass_str)
+        return AVERROR(ENOMEM);
+    rects[sub->num_rects]->ass = ass_str;
+    sub->num_rects++;
+    return 0;
+}
 
-/**
- * Escape a text subtitle using ASS syntax into an AVBPrint buffer.
- * Newline characters will be escaped to \N.
- *
- * @param buf pointer to an initialized AVBPrint buffer
- * @param p source text
- * @param size size of the source text
- * @param linebreaks additional newline chars, which will be escaped to \N
- * @param keep_ass_markup braces and backslash will not be escaped if set
- */
-void ff_ass_bprint_text_event(AVBPrint *buf, const char *p, int size,
-                             const char *linebreaks, int keep_ass_markup);
 #endif /* AVCODEC_ASS_H */
diff --git a/libavcodec/assdec.c b/libavcodec/assdec.c
index 319279490c..7802a44e71 100644
--- a/libavcodec/assdec.c
+++ b/libavcodec/assdec.c
@@ -22,7 +22,7 @@
 #include <string.h>
 
 #include "avcodec.h"
-#include "ass.h"
+#include "libavutil/ass_internal.h"
 #include "internal.h"
 #include "libavutil/internal.h"
 #include "libavutil/mem.h"
diff --git a/libavcodec/assenc.c b/libavcodec/assenc.c
index a6d107ded2..b0e475834b 100644
--- a/libavcodec/assenc.c
+++ b/libavcodec/assenc.c
@@ -22,7 +22,7 @@
 #include <string.h>
 
 #include "avcodec.h"
-#include "ass.h"
+#include "libavutil/ass_internal.h"
 #include "internal.h"
 #include "libavutil/avstring.h"
 #include "libavutil/internal.h"
diff --git a/libavcodec/ccaption_dec.c b/libavcodec/ccaption_dec.c
index 27c61527f6..27eef75657 100644
--- a/libavcodec/ccaption_dec.c
+++ b/libavcodec/ccaption_dec.c
@@ -272,15 +272,12 @@ static av_cold int init_decoder(AVCodecContext *avctx)
     ctx->bg_color = CCCOL_BLACK;
     ctx->rollup = 2;
     ctx->cursor_row = 10;
-    ret = ff_ass_subtitle_header(avctx, "Monospace",
+    ret = ff_ass_subtitle_header_full(avctx, ASS_DEFAULT_PLAYRESX, ASS_DEFAULT_PLAYRESY, "Monospace",
                                  ASS_DEFAULT_FONT_SIZE,
-                                 ASS_DEFAULT_COLOR,
-                                 ASS_DEFAULT_BACK_COLOR,
-                                 ASS_DEFAULT_BOLD,
-                                 ASS_DEFAULT_ITALIC,
-                                 ASS_DEFAULT_UNDERLINE,
-                                 3,
-                                 ASS_DEFAULT_ALIGNMENT);
+                                 ASS_DEFAULT_COLOR, ASS_DEFAULT_COLOR,
+                                 ASS_DEFAULT_BACK_COLOR, ASS_DEFAULT_BACK_COLOR,
+                                 ASS_DEFAULT_BOLD, ASS_DEFAULT_ITALIC, ASS_DEFAULT_UNDERLINE,
+                                 3, ASS_DEFAULT_ALIGNMENT);
     if (ret < 0) {
         return ret;
     }
@@ -886,7 +883,7 @@ static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avp
                                                      AV_TIME_BASE_Q, ms_tb);
             else
                 sub->end_display_time = -1;
-            ret = ff_ass_add_rect(sub, ctx->buffer[bidx].str, ctx->readorder++, 0, NULL, NULL);
+            ret = avpriv_ass_add_rect(sub, ctx->buffer[bidx].str, ctx->readorder++, 0, NULL, NULL);
             if (ret < 0)
                 return ret;
             ctx->last_real_time = sub->pts;
@@ -896,7 +893,7 @@ static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avp
 
     if (!bptr && !ctx->real_time && ctx->buffer[!ctx->buffer_index].str[0]) {
         bidx = !ctx->buffer_index;
-        ret = ff_ass_add_rect(sub, ctx->buffer[bidx].str, ctx->readorder++, 0, NULL, NULL);
+        ret = avpriv_ass_add_rect(sub, ctx->buffer[bidx].str, ctx->readorder++, 0, NULL, NULL);
         if (ret < 0)
             return ret;
         sub->pts = ctx->buffer_time[1];
@@ -914,7 +911,7 @@ static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avp
         capture_screen(ctx);
         ctx->buffer_changed = 0;
 
-        ret = ff_ass_add_rect(sub, ctx->buffer[bidx].str, ctx->readorder++, 0, NULL, NULL);
+        ret = avpriv_ass_add_rect(sub, ctx->buffer[bidx].str, ctx->readorder++, 0, NULL, NULL);
         if (ret < 0)
             return ret;
         sub->end_display_time = -1;
diff --git a/libavcodec/jacosubdec.c b/libavcodec/jacosubdec.c
index 698895a86b..6a53ec3e34 100644
--- a/libavcodec/jacosubdec.c
+++ b/libavcodec/jacosubdec.c
@@ -183,7 +183,7 @@ static int jacosub_decode_frame(AVCodecContext *avctx,
 
         av_bprint_init(&buffer, JSS_MAX_LINESIZE, JSS_MAX_LINESIZE);
         jacosub_to_ass(avctx, &buffer, ptr);
-        ret = ff_ass_add_rect(sub, buffer.str, s->readorder++, 0, NULL, NULL);
+        ret = avpriv_ass_add_rect(sub, buffer.str, s->readorder++, 0, NULL, NULL);
         av_bprint_finalize(&buffer, NULL);
         if (ret < 0)
             return ret;
diff --git a/libavcodec/libaribb24.c b/libavcodec/libaribb24.c
index 0766c0079d..3fb7e5f16e 100644
--- a/libavcodec/libaribb24.c
+++ b/libavcodec/libaribb24.c
@@ -273,7 +273,7 @@ next_region:
         av_log(avctx, AV_LOG_DEBUG, "Styled ASS line: %s\n",
                buf.str);
 
-        ret = ff_ass_add_rect(sub, buf.str, b24->read_order++,
+        ret = avpriv_ass_add_rect(sub, buf.str, b24->read_order++,
                               0, NULL, NULL);
     }
 
diff --git a/libavcodec/libzvbi-teletextdec.c b/libavcodec/libzvbi-teletextdec.c
index 1073d6a0bd..bd9edc34d7 100644
--- a/libavcodec/libzvbi-teletextdec.c
+++ b/libavcodec/libzvbi-teletextdec.c
@@ -152,12 +152,12 @@ static char *create_ass_text(TeletextContext *ctx, const char *text)
     AVBPrint buf;
 
     av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
-    ff_ass_bprint_text_event(&buf, text, strlen(text), "", 0);
+    avpriv_ass_bprint_text_event(&buf, text, strlen(text), "", 0);
     if (!av_bprint_is_complete(&buf)) {
         av_bprint_finalize(&buf, NULL);
         return NULL;
     }
-    dialog = ff_ass_get_dialog(ctx->readorder++, 0, NULL, NULL, buf.str);
+    dialog = avpriv_ass_get_dialog(ctx->readorder++, 0, NULL, NULL, buf.str);
     av_bprint_finalize(&buf, NULL);
     return dialog;
 }
@@ -224,7 +224,7 @@ static int gen_sub_text(TeletextContext *ctx, AVSubtitleRect *sub_rect, vbi_page
         }
         av_log(ctx, AV_LOG_DEBUG, "subtext:%s:txetbus\n", sub_rect->ass);
     } else {
-        sub_rect->type = SUBTITLE_NONE;
+        sub_rect->type = AV_SUBTITLE_FMT_NONE;
     }
     av_bprint_finalize(&buf, NULL);
     return 0;
@@ -394,7 +394,7 @@ static int gen_sub_ass(TeletextContext *ctx, AVSubtitleRect *sub_rect, vbi_page
 
     if (buf.len) {
         sub_rect->type = SUBTITLE_ASS;
-        sub_rect->ass = ff_ass_get_dialog(ctx->readorder++, 0, is_subtitle_page ? "Subtitle" : "Teletext", NULL, buf.str);
+        sub_rect->ass = avpriv_ass_get_dialog(ctx->readorder++, 0, is_subtitle_page ? "Subtitle" : "Teletext", NULL, buf.str);
 
         if (!sub_rect->ass) {
             av_bprint_finalize(&buf, NULL);
@@ -402,7 +402,7 @@ static int gen_sub_ass(TeletextContext *ctx, AVSubtitleRect *sub_rect, vbi_page
         }
         av_log(ctx, AV_LOG_DEBUG, "subtext:%s:txetbus\n", sub_rect->ass);
     } else {
-        sub_rect->type = SUBTITLE_NONE;
+        sub_rect->type = AV_SUBTITLE_FMT_NONE;
     }
     av_bprint_finalize(&buf, NULL);
     return 0;
@@ -462,7 +462,7 @@ static int gen_sub_bitmap(TeletextContext *ctx, AVSubtitleRect *sub_rect, vbi_pa
 
     if (vc >= vcend) {
         av_log(ctx, AV_LOG_DEBUG, "dropping empty page %3x\n", page->pgno);
-        sub_rect->type = SUBTITLE_NONE;
+        sub_rect->type = AV_SUBTITLE_FMT_NONE;
         return 0;
     }
 
@@ -695,7 +695,7 @@ static int teletext_decode_frame(AVCodecContext *avctx, void *data, int *got_sub
         sub->num_rects = 0;
         sub->pts = ctx->pages->pts;
 
-        if (ctx->pages->sub_rect->type != SUBTITLE_NONE) {
+        if (ctx->pages->sub_rect->type != AV_SUBTITLE_FMT_NONE) {
             sub->rects = av_malloc(sizeof(*sub->rects));
             if (sub->rects) {
                 sub->num_rects = 1;
diff --git a/libavcodec/microdvddec.c b/libavcodec/microdvddec.c
index c45fe043bf..fc09db8997 100644
--- a/libavcodec/microdvddec.c
+++ b/libavcodec/microdvddec.c
@@ -310,7 +310,7 @@ static int microdvd_decode_frame(AVCodecContext *avctx,
         }
     }
     if (new_line.len) {
-        int ret = ff_ass_add_rect(sub, new_line.str, s->readorder++, 0, NULL, NULL);
+        int ret = avpriv_ass_add_rect(sub, new_line.str, s->readorder++, 0, NULL, NULL);
         av_bprint_finalize(&new_line, NULL);
         if (ret < 0)
             return ret;
@@ -363,8 +363,9 @@ static int microdvd_init(AVCodecContext *avctx)
             }
         }
     }
-    return ff_ass_subtitle_header(avctx, font_buf.str, font_size, color,
-                                  ASS_DEFAULT_BACK_COLOR, bold, italic,
+    return ff_ass_subtitle_header_full(avctx, ASS_DEFAULT_PLAYRESX, ASS_DEFAULT_PLAYRESY,
+                                  font_buf.str, font_size, color, color,
+                                  ASS_DEFAULT_BACK_COLOR, ASS_DEFAULT_BACK_COLOR, bold, italic,
                                   underline, ASS_DEFAULT_BORDERSTYLE,
                                   alignment);
 }
diff --git a/libavcodec/movtextdec.c b/libavcodec/movtextdec.c
index 825632ca9b..9b17bac9ea 100644
--- a/libavcodec/movtextdec.c
+++ b/libavcodec/movtextdec.c
@@ -22,7 +22,6 @@
 #include "avcodec.h"
 #include "ass.h"
 #include "libavutil/opt.h"
-#include "libavutil/avstring.h"
 #include "libavutil/common.h"
 #include "libavutil/bprint.h"
 #include "libavutil/intreadwrite.h"
@@ -554,7 +553,7 @@ static int mov_text_decode_frame(AVCodecContext *avctx,
     } else
         text_to_ass(&buf, ptr, end, avctx);
 
-    ret = ff_ass_add_rect(sub, buf.str, m->readorder++, 0, NULL, NULL);
+    ret = avpriv_ass_add_rect(sub, buf.str, m->readorder++, 0, NULL, NULL);
     av_bprint_finalize(&buf, NULL);
     if (ret < 0)
         return ret;
diff --git a/libavcodec/movtextenc.c b/libavcodec/movtextenc.c
index 221cd76fea..d506ed5c37 100644
--- a/libavcodec/movtextenc.c
+++ b/libavcodec/movtextenc.c
@@ -26,8 +26,8 @@
 #include "libavutil/intreadwrite.h"
 #include "libavutil/mem.h"
 #include "libavutil/common.h"
-#include "ass_split.h"
-#include "ass.h"
+#include "libavutil/ass_split_internal.h"
+#include "libavutil/ass_internal.h"
 #include "bytestream.h"
 #include "internal.h"
 
@@ -167,7 +167,7 @@ static int mov_text_encode_close(AVCodecContext *avctx)
 {
     MovTextContext *s = avctx->priv_data;
 
-    ff_ass_split_free(s->ass_ctx);
+    avpriv_ass_split_free(s->ass_ctx);
     av_freep(&s->style_attributes);
     av_freep(&s->fonts);
     av_bprint_finalize(&s->buffer, NULL);
@@ -222,7 +222,7 @@ static int encode_sample_description(AVCodecContext *avctx)
     else
         s->font_scale_factor = 1;
 
-    style = ff_ass_style_get(s->ass_ctx, "Default");
+    style = avpriv_ass_style_get(s->ass_ctx, "Default");
     if (!style && ass->styles_count) {
         style = &ass->styles[0];
     }
@@ -329,7 +329,7 @@ static av_cold int mov_text_encode_init(AVCodecContext *avctx)
 
     av_bprint_init(&s->buffer, 0, AV_BPRINT_SIZE_UNLIMITED);
 
-    s->ass_ctx = ff_ass_split(avctx->subtitle_header);
+    s->ass_ctx = avpriv_ass_split(avctx->subtitle_header);
     if (!s->ass_ctx)
         return AVERROR_INVALIDDATA;
     ret = encode_sample_description(avctx);
@@ -566,7 +566,7 @@ static void mov_text_ass_style_set(MovTextContext *s, ASSStyle *style)
 
 static void mov_text_dialog(MovTextContext *s, ASSDialog *dialog)
 {
-    ASSStyle *style = ff_ass_style_get(s->ass_ctx, dialog->style);
+    ASSStyle *style = avpriv_ass_style_get(s->ass_ctx, dialog->style);
 
     s->ass_dialog_style = style;
     mov_text_ass_style_set(s, style);
@@ -580,7 +580,7 @@ static void mov_text_cancel_overrides_cb(void *priv, const char *style_name)
     if (!style_name || !*style_name)
         style = s->ass_dialog_style;
     else
-        style= ff_ass_style_get(s->ass_ctx, style_name);
+        style= avpriv_ass_style_get(s->ass_ctx, style_name);
 
     mov_text_ass_style_set(s, style);
 }
@@ -652,12 +652,12 @@ static int mov_text_encode_frame(AVCodecContext *avctx, unsigned char *buf,
             return AVERROR(EINVAL);
         }
 
-        dialog = ff_ass_split_dialog(s->ass_ctx, ass);
+        dialog = avpriv_ass_split_dialog(s->ass_ctx, ass);
         if (!dialog)
             return AVERROR(ENOMEM);
         mov_text_dialog(s, dialog);
-        ff_ass_split_override_codes(&mov_text_callbacks, s, dialog->text);
-        ff_ass_free_dialog(&dialog);
+        avpriv_ass_split_override_codes(&mov_text_callbacks, s, dialog->text);
+        avpriv_ass_free_dialog(&dialog);
     }
 
     if (s->buffer.len > UINT16_MAX)
diff --git a/libavcodec/mpl2dec.c b/libavcodec/mpl2dec.c
index 61e47050ec..fe806b4927 100644
--- a/libavcodec/mpl2dec.c
+++ b/libavcodec/mpl2dec.c
@@ -74,7 +74,7 @@ static int mpl2_decode_frame(AVCodecContext *avctx, void *data,
 
     av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
     if (ptr && avpkt->size > 0 && *ptr && !mpl2_event_to_ass(&buf, ptr))
-        ret = ff_ass_add_rect(sub, buf.str, s->readorder++, 0, NULL, NULL);
+        ret = avpriv_ass_add_rect(sub, buf.str, s->readorder++, 0, NULL, NULL);
     av_bprint_finalize(&buf, NULL);
     if (ret < 0)
         return ret;
diff --git a/libavcodec/realtextdec.c b/libavcodec/realtextdec.c
index 11b586d493..acd548b6b5 100644
--- a/libavcodec/realtextdec.c
+++ b/libavcodec/realtextdec.c
@@ -67,7 +67,7 @@ static int realtext_decode_frame(AVCodecContext *avctx,
 
     av_bprint_init(&buf, 0, 4096);
     if (ptr && avpkt->size > 0 && !rt_event_to_ass(&buf, ptr))
-        ret = ff_ass_add_rect(sub, buf.str, s->readorder++, 0, NULL, NULL);
+        ret = avpriv_ass_add_rect(sub, buf.str, s->readorder++, 0, NULL, NULL);
     av_bprint_finalize(&buf, NULL);
     if (ret < 0)
         return ret;
diff --git a/libavcodec/samidec.c b/libavcodec/samidec.c
index 32d07447b4..1249b629d6 100644
--- a/libavcodec/samidec.c
+++ b/libavcodec/samidec.c
@@ -144,7 +144,7 @@ static int sami_decode_frame(AVCodecContext *avctx,
         if (ret < 0)
             return ret;
         // TODO: pass escaped sami->encoded_source.str as source
-        ret = ff_ass_add_rect(sub, sami->full.str, sami->readorder++, 0, NULL, NULL);
+        ret = avpriv_ass_add_rect(sub, sami->full.str, sami->readorder++, 0, NULL, NULL);
         if (ret < 0)
             return ret;
     }
diff --git a/libavcodec/srtdec.c b/libavcodec/srtdec.c
index 4f16226b83..847352eb37 100644
--- a/libavcodec/srtdec.c
+++ b/libavcodec/srtdec.c
@@ -78,7 +78,7 @@ static int srt_decode_frame(AVCodecContext *avctx,
 
     ret = srt_to_ass(avctx, &buffer, avpkt->data, x1, y1, x2, y2);
     if (ret >= 0)
-        ret = ff_ass_add_rect(sub, buffer.str, s->readorder++, 0, NULL, NULL);
+        ret = avpriv_ass_add_rect(sub, buffer.str, s->readorder++, 0, NULL, NULL);
     av_bprint_finalize(&buffer, NULL);
     if (ret < 0)
         return ret;
diff --git a/libavcodec/srtenc.c b/libavcodec/srtenc.c
index 2e3ac55770..a7c5fccefe 100644
--- a/libavcodec/srtenc.c
+++ b/libavcodec/srtenc.c
@@ -23,8 +23,8 @@
 #include "avcodec.h"
 #include "libavutil/avstring.h"
 #include "libavutil/bprint.h"
-#include "ass_split.h"
-#include "ass.h"
+#include "libavutil/ass_split_internal.h"
+#include "libavutil/ass_internal.h"
 #include "internal.h"
 
 
@@ -94,7 +94,7 @@ static void srt_stack_push_pop(SRTContext *s, const char c, int close)
 
 static void srt_style_apply(SRTContext *s, const char *style)
 {
-    ASSStyle *st = ff_ass_style_get(s->ass_ctx, style);
+    ASSStyle *st = avpriv_ass_style_get(s->ass_ctx, style);
     if (st) {
         int c = st->primary_color & 0xFFFFFF;
         if (st->font_name && strcmp(st->font_name, ASS_DEFAULT_FONT) ||
@@ -135,7 +135,7 @@ static av_cold int srt_encode_init(AVCodecContext *avctx)
 {
     SRTContext *s = avctx->priv_data;
     s->avctx = avctx;
-    s->ass_ctx = ff_ass_split(avctx->subtitle_header);
+    s->ass_ctx = avpriv_ass_split(avctx->subtitle_header);
     av_bprint_init(&s->buffer, 0, AV_BPRINT_SIZE_UNLIMITED);
     return s->ass_ctx ? 0 : AVERROR_INVALIDDATA;
 }
@@ -245,14 +245,14 @@ static int encode_frame(AVCodecContext *avctx,
             return AVERROR(EINVAL);
         }
 
-        dialog = ff_ass_split_dialog(s->ass_ctx, ass);
+        dialog = avpriv_ass_split_dialog(s->ass_ctx, ass);
         if (!dialog)
             return AVERROR(ENOMEM);
         s->alignment_applied = 0;
         if (avctx->codec_id == AV_CODEC_ID_SUBRIP)
             srt_style_apply(s, dialog->style);
-        ff_ass_split_override_codes(cb, s, dialog->text);
-        ff_ass_free_dialog(&dialog);
+        avpriv_ass_split_override_codes(cb, s, dialog->text);
+        avpriv_ass_free_dialog(&dialog);
     }
 
     if (!av_bprint_is_complete(&s->buffer))
@@ -284,7 +284,7 @@ static int text_encode_frame(AVCodecContext *avctx,
 static int srt_encode_close(AVCodecContext *avctx)
 {
     SRTContext *s = avctx->priv_data;
-    ff_ass_split_free(s->ass_ctx);
+    avpriv_ass_split_free(s->ass_ctx);
     av_bprint_finalize(&s->buffer, NULL);
     return 0;
 }
diff --git a/libavcodec/subviewerdec.c b/libavcodec/subviewerdec.c
index 5c650d0cde..04e9ae7c09 100644
--- a/libavcodec/subviewerdec.c
+++ b/libavcodec/subviewerdec.c
@@ -58,7 +58,7 @@ static int subviewer_decode_frame(AVCodecContext *avctx,
 
     av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
     if (ptr && avpkt->size > 0 && !subviewer_event_to_ass(&buf, ptr))
-        ret = ff_ass_add_rect(sub, buf.str, s->readorder++, 0, NULL, NULL);
+        ret = avpriv_ass_add_rect(sub, buf.str, s->readorder++, 0, NULL, NULL);
     av_bprint_finalize(&buf, NULL);
     if (ret < 0)
         return ret;
diff --git a/libavcodec/textdec.c b/libavcodec/textdec.c
index 308553660a..7556deefe8 100644
--- a/libavcodec/textdec.c
+++ b/libavcodec/textdec.c
@@ -54,8 +54,8 @@ static int text_decode_frame(AVCodecContext *avctx, void *data,
 
     av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
     if (ptr && avpkt->size > 0 && *ptr) {
-        ff_ass_bprint_text_event(&buf, ptr, avpkt->size, text->linebreaks, text->keep_ass_markup);
-        ret = ff_ass_add_rect(sub, buf.str, text->readorder++, 0, NULL, NULL);
+        avpriv_ass_bprint_text_event(&buf, ptr, avpkt->size, text->linebreaks, text->keep_ass_markup);
+        ret = avpriv_ass_add_rect(sub, buf.str, text->readorder++, 0, NULL, NULL);
     }
     av_bprint_finalize(&buf, NULL);
     if (ret < 0)
diff --git a/libavcodec/ttmlenc.c b/libavcodec/ttmlenc.c
index ad2eddfdd5..083f2dd67a 100644
--- a/libavcodec/ttmlenc.c
+++ b/libavcodec/ttmlenc.c
@@ -32,8 +32,7 @@
 #include "libavutil/avstring.h"
 #include "libavutil/bprint.h"
 #include "libavutil/internal.h"
-#include "ass_split.h"
-#include "ass.h"
+#include "libavutil/ass_split_internal.h"
 #include "ttmlenc.h"
 
 typedef struct {
@@ -95,7 +94,7 @@ static int ttml_encode_frame(AVCodecContext *avctx, uint8_t *buf,
             return AVERROR(EINVAL);
         }
 
-        dialog = ff_ass_split_dialog(s->ass_ctx, ass);
+        dialog = avpriv_ass_split_dialog(s->ass_ctx, ass);
         if (!dialog)
             return AVERROR(ENOMEM);
 
@@ -107,7 +106,7 @@ static int ttml_encode_frame(AVCodecContext *avctx, uint8_t *buf,
             av_bprintf(&s->buffer, "\">");
         }
 
-        ret = ff_ass_split_override_codes(&ttml_callbacks, s, dialog->text);
+        ret = avpriv_ass_split_override_codes(&ttml_callbacks, s, dialog->text);
         if (ret < 0) {
             int log_level = (ret != AVERROR_INVALIDDATA ||
                              avctx->err_recognition & AV_EF_EXPLODE) ?
@@ -118,7 +117,7 @@ static int ttml_encode_frame(AVCodecContext *avctx, uint8_t *buf,
                    av_err2str(ret));
 
             if (log_level == AV_LOG_ERROR) {
-                ff_ass_free_dialog(&dialog);
+                avpriv_ass_free_dialog(&dialog);
                 return ret;
             }
         }
@@ -126,7 +125,7 @@ static int ttml_encode_frame(AVCodecContext *avctx, uint8_t *buf,
         if (dialog->style)
             av_bprintf(&s->buffer, "</span>");
 
-        ff_ass_free_dialog(&dialog);
+        avpriv_ass_free_dialog(&dialog);
     }
 
     if (!av_bprint_is_complete(&s->buffer))
@@ -148,7 +147,7 @@ static av_cold int ttml_encode_close(AVCodecContext *avctx)
 {
     TTMLContext *s = avctx->priv_data;
 
-    ff_ass_split_free(s->ass_ctx);
+    avpriv_ass_split_free(s->ass_ctx);
 
     av_bprint_finalize(&s->buffer, NULL);
 
@@ -372,7 +371,7 @@ static av_cold int ttml_encode_init(AVCodecContext *avctx)
 
     av_bprint_init(&s->buffer, 0, AV_BPRINT_SIZE_UNLIMITED);
 
-    if (!(s->ass_ctx = ff_ass_split(avctx->subtitle_header))) {
+    if (!(s->ass_ctx = avpriv_ass_split(avctx->subtitle_header))) {
         return AVERROR_INVALIDDATA;
     }
 
diff --git a/libavcodec/webvttdec.c b/libavcodec/webvttdec.c
index 0093f328fa..d304edc705 100644
--- a/libavcodec/webvttdec.c
+++ b/libavcodec/webvttdec.c
@@ -91,7 +91,7 @@ static int webvtt_decode_frame(AVCodecContext *avctx,
 
     av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
     if (ptr && avpkt->size > 0 && !webvtt_event_to_ass(&buf, ptr))
-        ret = ff_ass_add_rect(sub, buf.str, s->readorder++, 0, NULL, NULL);
+        ret = avpriv_ass_add_rect(sub, buf.str, s->readorder++, 0, NULL, NULL);
     av_bprint_finalize(&buf, NULL);
     if (ret < 0)
         return ret;
diff --git a/libavcodec/webvttenc.c b/libavcodec/webvttenc.c
index 89b49e42bf..761099b69a 100644
--- a/libavcodec/webvttenc.c
+++ b/libavcodec/webvttenc.c
@@ -24,8 +24,8 @@
 #include "avcodec.h"
 #include "libavutil/avstring.h"
 #include "libavutil/bprint.h"
-#include "ass_split.h"
-#include "ass.h"
+#include "libavutil/ass_split_internal.h"
+#include "libavutil/ass_internal.h"
 #include "internal.h"
 
 #define WEBVTT_STACK_SIZE 64
@@ -93,7 +93,7 @@ static void webvtt_stack_push_pop(WebVTTContext *s, const char c, int close)
 
 static void webvtt_style_apply(WebVTTContext *s, const char *style)
 {
-    ASSStyle *st = ff_ass_style_get(s->ass_ctx, style);
+    ASSStyle *st = avpriv_ass_style_get(s->ass_ctx, style);
     if (st) {
         if (st->bold != ASS_DEFAULT_BOLD) {
             webvtt_print(s, "<b>");
@@ -172,12 +172,12 @@ static int webvtt_encode_frame(AVCodecContext *avctx,
             return AVERROR(EINVAL);
         }
 
-        dialog = ff_ass_split_dialog(s->ass_ctx, ass);
+        dialog = avpriv_ass_split_dialog(s->ass_ctx, ass);
         if (!dialog)
             return AVERROR(ENOMEM);
         webvtt_style_apply(s, dialog->style);
-        ff_ass_split_override_codes(&webvtt_callbacks, s, dialog->text);
-        ff_ass_free_dialog(&dialog);
+        avpriv_ass_split_override_codes(&webvtt_callbacks, s, dialog->text);
+        avpriv_ass_free_dialog(&dialog);
     }
 
     if (!av_bprint_is_complete(&s->buffer))
@@ -197,7 +197,7 @@ static int webvtt_encode_frame(AVCodecContext *avctx,
 static int webvtt_encode_close(AVCodecContext *avctx)
 {
     WebVTTContext *s = avctx->priv_data;
-    ff_ass_split_free(s->ass_ctx);
+    avpriv_ass_split_free(s->ass_ctx);
     av_bprint_finalize(&s->buffer, NULL);
     return 0;
 }
@@ -206,7 +206,7 @@ static av_cold int webvtt_encode_init(AVCodecContext *avctx)
 {
     WebVTTContext *s = avctx->priv_data;
     s->avctx = avctx;
-    s->ass_ctx = ff_ass_split(avctx->subtitle_header);
+    s->ass_ctx = avpriv_ass_split(avctx->subtitle_header);
     av_bprint_init(&s->buffer, 0, AV_BPRINT_SIZE_UNLIMITED);
     return s->ass_ctx ? 0 : AVERROR_INVALIDDATA;
 }
diff --git a/libavutil/Makefile b/libavutil/Makefile
index 7e79936876..b81d8e0d35 100644
--- a/libavutil/Makefile
+++ b/libavutil/Makefile
@@ -101,6 +101,8 @@ BUILT_HEADERS = avconfig.h                                              \
 OBJS = adler32.o                                                        \
        aes.o                                                            \
        aes_ctr.o                                                        \
+       ass.o                                                            \
+       ass_split.o                                                      \
        audio_fifo.o                                                     \
        avstring.o                                                       \
        avsscanf.o                                                       \
diff --git a/libavcodec/ass.c b/libavutil/ass.c
similarity index 65%
rename from libavcodec/ass.c
rename to libavutil/ass.c
index 907e2d7b88..d494de5fe2 100644
--- a/libavcodec/ass.c
+++ b/libavutil/ass.c
@@ -19,21 +19,22 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#include "avcodec.h"
-#include "ass.h"
+#include "ass_internal.h"
+
+#include "subfmt.h"
 #include "libavutil/avstring.h"
 #include "libavutil/bprint.h"
 #include "libavutil/common.h"
 
-int ff_ass_subtitle_header_full(AVCodecContext *avctx,
-                                int play_res_x, int play_res_y,
-                                const char *font, int font_size,
-                                int primary_color, int secondary_color,
-                                int outline_color, int back_color,
-                                int bold, int italic, int underline,
-                                int border_style, int alignment)
+char* avpriv_ass_get_subtitle_header_full(int play_res_x, int play_res_y,
+                                    const char *font, int font_size,
+                                    int primary_color, int secondary_color,
+                                    int outline_color, int back_color,
+                                    int bold, int italic, int underline,
+                                    int border_style, int alignment,
+                                    int print_av_version)
 {
-    avctx->subtitle_header = av_asprintf(
+    char* header = av_asprintf(
              "[Script Info]\r\n"
              "; Script generated by FFmpeg/Lavc%s\r\n"
              "ScriptType: v4.00+\r\n"
@@ -68,34 +69,31 @@ int ff_ass_subtitle_header_full(AVCodecContext *avctx,
              "\r\n"
              "[Events]\r\n"
              "Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text\r\n",
-             !(avctx->flags & AV_CODEC_FLAG_BITEXACT) ? AV_STRINGIFY(LIBAVCODEC_VERSION) : "",
+             print_av_version ? AV_STRINGIFY(LIBAVCODEC_VERSION) : "",
              play_res_x, play_res_y, font, font_size,
              primary_color, secondary_color, outline_color, back_color,
              -bold, -italic, -underline, border_style, alignment);
 
-    if (!avctx->subtitle_header)
-        return AVERROR(ENOMEM);
-    avctx->subtitle_header_size = strlen(avctx->subtitle_header);
-    return 0;
+    return header;
 }
 
-int ff_ass_subtitle_header(AVCodecContext *avctx,
-                           const char *font, int font_size,
+char* avpriv_ass_get_subtitle_header(const char *font, int font_size,
                            int color, int back_color,
                            int bold, int italic, int underline,
-                           int border_style, int alignment)
+                           int border_style, int alignment,
+                           int print_av_version)
 {
-    return ff_ass_subtitle_header_full(avctx,
-                               ASS_DEFAULT_PLAYRESX, ASS_DEFAULT_PLAYRESY,
-                               font, font_size, color, color,
-                               back_color, back_color,
-                               bold, italic, underline,
-                               border_style, alignment);
+    return avpriv_ass_get_subtitle_header_full(ASS_DEFAULT_PLAYRESX, ASS_DEFAULT_PLAYRESY,
+                                       font, font_size, color, color,
+                                       back_color, back_color,
+                                       bold, italic, underline,
+                                       border_style, alignment,
+                                       print_av_version);
 }
 
-int ff_ass_subtitle_header_default(AVCodecContext *avctx)
+char* avpriv_ass_get_subtitle_header_default(int print_av_version)
 {
-    return ff_ass_subtitle_header(avctx, ASS_DEFAULT_FONT,
+    return avpriv_ass_get_subtitle_header(ASS_DEFAULT_FONT,
                                ASS_DEFAULT_FONT_SIZE,
                                ASS_DEFAULT_COLOR,
                                ASS_DEFAULT_BACK_COLOR,
@@ -103,10 +101,11 @@ int ff_ass_subtitle_header_default(AVCodecContext *avctx)
                                ASS_DEFAULT_ITALIC,
                                ASS_DEFAULT_UNDERLINE,
                                ASS_DEFAULT_BORDERSTYLE,
-                               ASS_DEFAULT_ALIGNMENT);
+                               ASS_DEFAULT_ALIGNMENT,
+                               print_av_version);
 }
 
-char *ff_ass_get_dialog(int readorder, int layer, const char *style,
+char *avpriv_ass_get_dialog(int readorder, int layer, const char *style,
                         const char *speaker, const char *text)
 {
     return av_asprintf("%d,%d,%s,%s,0,0,0,,%s",
@@ -114,37 +113,7 @@ char *ff_ass_get_dialog(int readorder, int layer, const char *style,
                        speaker ? speaker : "", text);
 }
 
-int ff_ass_add_rect(AVSubtitle *sub, const char *dialog,
-                    int readorder, int layer, const char *style,
-                    const char *speaker)
-{
-    char *ass_str;
-    AVSubtitleRect **rects;
-
-    rects = av_realloc_array(sub->rects, sub->num_rects+1, sizeof(*sub->rects));
-    if (!rects)
-        return AVERROR(ENOMEM);
-    sub->rects = rects;
-    rects[sub->num_rects]       = av_mallocz(sizeof(*rects[0]));
-    if (!rects[sub->num_rects])
-        return AVERROR(ENOMEM);
-    rects[sub->num_rects]->type = SUBTITLE_ASS;
-    ass_str = ff_ass_get_dialog(readorder, layer, style, speaker, dialog);
-    if (!ass_str)
-        return AVERROR(ENOMEM);
-    rects[sub->num_rects]->ass = ass_str;
-    sub->num_rects++;
-    return 0;
-}
-
-void ff_ass_decoder_flush(AVCodecContext *avctx)
-{
-    FFASSDecoderContext *s = avctx->priv_data;
-    if (!(avctx->flags2 & AV_CODEC_FLAG2_RO_FLUSH_NOOP))
-        s->readorder = 0;
-}
-
-void ff_ass_bprint_text_event(AVBPrint *buf, const char *p, int size,
+void avpriv_ass_bprint_text_event(AVBPrint *buf, const char *p, int size,
                              const char *linebreaks, int keep_ass_markup)
 {
     const char *p_end = p + size;
diff --git a/libavutil/ass_internal.h b/libavutil/ass_internal.h
new file mode 100644
index 0000000000..833766eada
--- /dev/null
+++ b/libavutil/ass_internal.h
@@ -0,0 +1,133 @@
+/*
+ * SSA/ASS common functions
+ * Copyright (c) 2010  Aurelien Jacobs <aurel@gnuage.org>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_ASS_INTERNAL_H
+#define AVUTIL_ASS_INTERNAL_H
+
+#include "subfmt.h"
+#include "libavutil/bprint.h"
+
+#define ASS_DEFAULT_PLAYRESX 384
+#define ASS_DEFAULT_PLAYRESY 288
+
+/**
+ * @name Default values for ASS style
+ * @{
+ */
+#define ASS_DEFAULT_FONT        "Arial"
+#define ASS_DEFAULT_FONT_SIZE   16
+#define ASS_DEFAULT_COLOR       0xffffff
+#define ASS_DEFAULT_BACK_COLOR  0
+#define ASS_DEFAULT_BOLD        0
+#define ASS_DEFAULT_ITALIC      0
+#define ASS_DEFAULT_UNDERLINE   0
+#define ASS_DEFAULT_ALIGNMENT   2
+#define ASS_DEFAULT_BORDERSTYLE 1
+/** @} */
+
+/**
+ * Generate a suitable AVCodecContext.subtitle_header for SUBTITLE_ASS.
+ * Can specify all fields explicitly
+ *
+ * @param play_res_x subtitle frame width
+ * @param play_res_y subtitle frame height
+ * @param font name of the default font face to use
+ * @param font_size default font size to use
+ * @param primary_color default text color to use (ABGR)
+ * @param secondary_color default secondary text color to use (ABGR)
+ * @param outline_color default outline color to use (ABGR)
+ * @param back_color default background color to use (ABGR)
+ * @param bold 1 for bold text, 0 for normal text
+ * @param italic 1 for italic text, 0 for normal text
+ * @param underline 1 for underline text, 0 for normal text
+ * @param border_style 1 for outline, 3 for opaque box
+ * @param alignment position of the text (left, center, top...), defined after
+ *                  the layout of the numpad (1-3 sub, 4-6 mid, 7-9 top)
+ * @param print_av_version include library version in header
+ * @return a string containing the subtitle header that needs
+ *         to be released via av_free()
+ */
+char* avpriv_ass_get_subtitle_header_full(int play_res_x, int play_res_y,
+                                  const char *font, int font_size,
+                                  int primary_color, int secondary_color,
+                                  int outline_color, int back_color,
+                                  int bold, int italic, int underline,
+                                  int border_style, int alignment,
+                                  int print_av_version);
+/**
+ * Generate a suitable AVCodecContext.subtitle_header for SUBTITLE_ASS.
+ *
+ * @param font name of the default font face to use
+ * @param font_size default font size to use
+ * @param color default text color to use (ABGR)
+ * @param back_color default background color to use (ABGR)
+ * @param bold 1 for bold text, 0 for normal text
+ * @param italic 1 for italic text, 0 for normal text
+ * @param underline 1 for underline text, 0 for normal text
+ * @param border_style 1 for outline, 3 for opaque box
+ * @param alignment position of the text (left, center, top...), defined after
+ *                  the layout of the numpad (1-3 sub, 4-6 mid, 7-9 top)
+ * @param print_av_version include library version in header
+ * @return a string containing the subtitle header that needs
+ *         to be released via av_free()
+ */
+char* avpriv_ass_get_subtitle_header(const char *font, int font_size,
+                                int color, int back_color,
+                                int bold, int italic, int underline,
+                                int border_style, int alignment,
+                                int print_av_version);
+
+/**
+ * Generate a suitable AVCodecContext.subtitle_header for SUBTITLE_ASS
+ * with default style.
+ *
+ * @param print_av_version include library version in header
+ * @return a string containing the subtitle header that needs
+ *         to be released via av_free()
+ */
+char* avpriv_ass_get_subtitle_header_default(int print_av_version);
+
+/**
+ * Craft an ASS dialog string.
+ */
+char *avpriv_ass_get_dialog(int readorder, int layer, const char *style,
+                        const char *speaker, const char *text);
+
+
+/////**
+//// * Helper to flush a text subtitles decoder making use of the
+//// * FFASSDecoderContext.
+//// */
+////void ff_ass_decoder_flush(AVCodecContext *avctx);
+
+/**
+ * Escape a text subtitle using ASS syntax into an AVBPrint buffer.
+ * Newline characters will be escaped to \N.
+ *
+ * @param buf pointer to an initialized AVBPrint buffer
+ * @param p source text
+ * @param size size of the source text
+ * @param linebreaks additional newline chars, which will be escaped to \N
+ * @param keep_ass_markup braces and backslash will not be escaped if set
+ */
+void avpriv_ass_bprint_text_event(AVBPrint *buf, const char *p, int size,
+                             const char *linebreaks, int keep_ass_markup);
+#endif /* AVUTIL_ASS_INTERNAL_H */
diff --git a/libavcodec/ass_split.c b/libavutil/ass_split.c
similarity index 94%
rename from libavcodec/ass_split.c
rename to libavutil/ass_split.c
index 05c5453e53..c5963351fc 100644
--- a/libavcodec/ass_split.c
+++ b/libavutil/ass_split.c
@@ -22,7 +22,7 @@
 #include "libavutil/common.h"
 #include "libavutil/error.h"
 #include "libavutil/mem.h"
-#include "ass_split.h"
+#include "ass_split_internal.h"
 
 typedef enum {
     ASS_STR,
@@ -373,7 +373,7 @@ static int ass_split(ASSSplitContext *ctx, const char *buf)
     return buf ? 0 : AVERROR_INVALIDDATA;
 }
 
-ASSSplitContext *ff_ass_split(const char *buf)
+ASSSplitContext *avpriv_ass_split(const char *buf)
 {
     ASSSplitContext *ctx = av_mallocz(sizeof(*ctx));
     if (!ctx)
@@ -382,7 +382,7 @@ ASSSplitContext *ff_ass_split(const char *buf)
         buf += 3;
     ctx->current_section = -1;
     if (ass_split(ctx, buf) < 0) {
-        ff_ass_split_free(ctx);
+        avpriv_ass_split_free(ctx);
         return NULL;
     }
     return ctx;
@@ -412,7 +412,7 @@ static void free_section(ASSSplitContext *ctx, const ASSSection *section)
         av_freep((uint8_t *)&ctx->ass + section->offset);
 }
 
-void ff_ass_free_dialog(ASSDialog **dialogp)
+void avpriv_ass_free_dialog(ASSDialog **dialogp)
 {
     ASSDialog *dialog = *dialogp;
     if (!dialog)
@@ -424,7 +424,7 @@ void ff_ass_free_dialog(ASSDialog **dialogp)
     av_freep(dialogp);
 }
 
-ASSDialog *ff_ass_split_dialog(ASSSplitContext *ctx, const char *buf)
+ASSDialog *avpriv_ass_split_dialog(ASSSplitContext *ctx, const char *buf)
 {
     int i;
     static const ASSFields fields[] = {
@@ -451,7 +451,7 @@ ASSDialog *ff_ass_split_dialog(ASSSplitContext *ctx, const char *buf)
         buf = skip_space(buf);
         len = last ? strlen(buf) : strcspn(buf, ",");
         if (len >= INT_MAX) {
-            ff_ass_free_dialog(&dialog);
+            avpriv_ass_free_dialog(&dialog);
             return NULL;
         }
         convert_func[type](ptr, buf, len);
@@ -461,7 +461,7 @@ ASSDialog *ff_ass_split_dialog(ASSSplitContext *ctx, const char *buf)
     return dialog;
 }
 
-void ff_ass_split_free(ASSSplitContext *ctx)
+void avpriv_ass_split_free(ASSSplitContext *ctx)
 {
     if (ctx) {
         int i;
@@ -474,7 +474,7 @@ void ff_ass_split_free(ASSSplitContext *ctx)
 }
 
 
-int ff_ass_split_override_codes(const ASSCodesCallbacks *callbacks, void *priv,
+int avpriv_ass_split_override_codes(const ASSCodesCallbacks *callbacks, void *priv,
                                 const char *buf)
 {
     const char *text = NULL;
@@ -497,8 +497,8 @@ int ff_ass_split_override_codes(const ASSCodesCallbacks *callbacks, void *priv,
             while (*buf == '\\') {
                 char style[2], c[2], sep[2], c_num[2] = "0", tmp[128] = {0};
                 unsigned int color = 0xFFFFFFFF;
-                int len, size = -1, an = -1, alpha = -1;
-                int x1, y1, x2, y2, t1 = -1, t2 = -1;
+                int len, size = -1, an = -1, alpha = -1, scale = 0;
+                int x1, y1, x2, y2, t1 = -1, t2 = -1, accel = 1;
                 if (sscanf(buf, "\\%1[bisu]%1[01\\}]%n", style, c, &len) > 1) {
                     int close = c[0] == '0' ? 1 : c[0] == '1' ? 0 : -1;
                     len += close != -1;
@@ -546,6 +546,14 @@ int ff_ass_split_override_codes(const ASSCodesCallbacks *callbacks, void *priv,
                 } else if (sscanf(buf, "\\org(%d,%d)%1[\\}]%n", &x1, &y1, sep, &len) > 2) {
                     if (callbacks->origin)
                         callbacks->origin(priv, x1, y1);
+                } else if (sscanf(buf, "\\t(%d,%d,%1[\\}]%n", &t1, &t2, sep, &len) > 2 ||
+                           sscanf(buf, "\\t(%d,%d,%d,%1[\\}]%n", &t1, &t2, &accel, sep, &len) > 3) {
+                    if (callbacks->animate)
+                        callbacks->animate(priv, t1, t2, accel, tmp);
+                } else if (sscanf(buf, "\\p%1[\\}]%n", sep, &len) > 0 ||
+                           sscanf(buf, "\\p%u%1[\\}]%n", &scale, sep, &len) > 1) {
+                    if (callbacks->drawing_mode)
+                        callbacks->drawing_mode(priv, scale);
                 } else {
                     len = strcspn(buf+1, "\\}") + 2;  /* skip unknown code */
                 }
@@ -569,7 +577,7 @@ int ff_ass_split_override_codes(const ASSCodesCallbacks *callbacks, void *priv,
     return 0;
 }
 
-ASSStyle *ff_ass_style_get(ASSSplitContext *ctx, const char *style)
+ASSStyle *avpriv_ass_style_get(ASSSplitContext *ctx, const char *style)
 {
     ASS *ass = &ctx->ass;
     int i;
diff --git a/libavcodec/ass_split.h b/libavutil/ass_split_internal.h
similarity index 86%
rename from libavcodec/ass_split.h
rename to libavutil/ass_split_internal.h
index a45fb9b8a1..eee49ef0f5 100644
--- a/libavcodec/ass_split.h
+++ b/libavutil/ass_split_internal.h
@@ -19,8 +19,8 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#ifndef AVCODEC_ASS_SPLIT_H
-#define AVCODEC_ASS_SPLIT_H
+#ifndef AVUTIL_ASS_SPLIT_INTERNAL_H
+#define AVUTIL_ASS_SPLIT_INTERNAL_H
 
 /**
  * fields extracted from the [Script Info] section
@@ -81,7 +81,7 @@ typedef struct {
     char *effect;
     char *text;     /**< actual text which will be displayed as a subtitle,
                          can include style override control codes (see
-                         ff_ass_split_override_codes()) */
+                         avpriv_ass_split_override_codes()) */
 } ASSDialog;
 
 /**
@@ -107,12 +107,12 @@ typedef struct ASSSplitContext ASSSplitContext;
  * @param buf String containing the ASS formatted data.
  * @return Newly allocated struct containing split data.
  */
-ASSSplitContext *ff_ass_split(const char *buf);
+ASSSplitContext *avpriv_ass_split(const char *buf);
 
 /**
- * Free a dialogue obtained from ff_ass_split_dialog().
+ * Free a dialogue obtained from avpriv_ass_split_dialog().
  */
-void ff_ass_free_dialog(ASSDialog **dialogp);
+void avpriv_ass_free_dialog(ASSDialog **dialogp);
 
 /**
  * Split one ASS Dialogue line from a string buffer.
@@ -121,14 +121,14 @@ void ff_ass_free_dialog(ASSDialog **dialogp);
  * @param buf String containing the ASS "Dialogue" line.
  * @return Pointer to the split ASSDialog. Must be freed with ff_ass_free_dialog()
  */
-ASSDialog *ff_ass_split_dialog(ASSSplitContext *ctx, const char *buf);
+ASSDialog *avpriv_ass_split_dialog(ASSSplitContext *ctx, const char *buf);
 
 /**
  * Free all the memory allocated for an ASSSplitContext.
  *
  * @param ctx Context previously initialized by ff_ass_split().
  */
-void ff_ass_split_free(ASSSplitContext *ctx);
+void avpriv_ass_split_free(ASSSplitContext *ctx);
 
 
 /**
@@ -141,6 +141,7 @@ typedef struct {
      * @{
      */
     void (*text)(void *priv, const char *text, int len);
+    void (*hard_space)(void *priv);
     void (*new_line)(void *priv, int forced);
     void (*style)(void *priv, char style, int close);
     void (*color)(void *priv, unsigned int /* color */, unsigned int color_id);
@@ -156,7 +157,16 @@ typedef struct {
      * @{
      */
     void (*move)(void *priv, int x1, int y1, int x2, int y2, int t1, int t2);
+    void (*animate)(void *priv, int t1, int t2, int accel, char *style);
     void (*origin)(void *priv, int x, int y);
+    void (*drawing_mode)(void *priv, int scale);
+    /** @} */
+
+    /**
+     * @defgroup ass_ext    ASS extensible parsing callback
+     * @{
+     */
+    void (*ext)(void *priv, int ext_id, const char *text, int p1, int p2);
     /** @} */
 
     /**
@@ -176,7 +186,7 @@ typedef struct {
  * @param buf The ASS "Dialogue" Text field to split.
  * @return >= 0 on success otherwise an error code <0
  */
-int ff_ass_split_override_codes(const ASSCodesCallbacks *callbacks, void *priv,
+int avpriv_ass_split_override_codes(const ASSCodesCallbacks *callbacks, void *priv,
                                 const char *buf);
 
 /**
@@ -186,6 +196,6 @@ int ff_ass_split_override_codes(const ASSCodesCallbacks *callbacks, void *priv,
  * @param style name of the style to search for.
  * @return the ASSStyle corresponding to style, or NULL if style can't be found
  */
-ASSStyle *ff_ass_style_get(ASSSplitContext *ctx, const char *style);
+ASSStyle *avpriv_ass_style_get(ASSSplitContext *ctx, const char *style);
 
-#endif /* AVCODEC_ASS_SPLIT_H */
+#endif /* AVUTIL_ASS_SPLIT_INTERNAL_H */
