lavc: allow subtitle text format to be ASS without timing

1 files changed, 14 insertions, 5 deletions

diff --git a/libavcodec/textdec.c b/libavcodec/textdec.c
index a6c8722c1d..4e2ff2c144 100644
--- a/libavcodec/textdec.c
+++ b/libavcodec/textdec.c
@@ -32,6 +32,7 @@ typedef struct {
     AVClass *class;
     const char *linebreaks;
     int keep_ass_markup;
+    int readorder;
 } TextContext;
 
 #define OFFSET(x) offsetof(TextContext, x)
@@ -48,15 +49,12 @@ static int text_decode_frame(AVCodecContext *avctx, void *data,
     AVBPrint buf;
     AVSubtitle *sub = data;
     const char *ptr = avpkt->data;
-    const TextContext *text = avctx->priv_data;
-    const int ts_start     = av_rescale_q(avpkt->pts,      avctx->time_base, (AVRational){1,100});
-    const int ts_duration  = avpkt->duration != -1 ?
-                             av_rescale_q(avpkt->duration, avctx->time_base, (AVRational){1,100}) : -1;
+    TextContext *text = avctx->priv_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_bprint(sub, &buf, ts_start, ts_duration);
+        ret = ff_ass_add_rect(sub, buf.str, text->readorder++, 0, NULL, NULL);
     }
     av_bprint_finalize(&buf, NULL);
     if (ret < 0)
@@ -65,6 +63,12 @@ static int text_decode_frame(AVCodecContext *avctx, void *data,
     return avpkt->size;
 }
 
+static void text_flush(AVCodecContext *avctx)
+{
+    TextContext *text = avctx->priv_data;
+    text->readorder = 0;
+}
+
 #define DECLARE_CLASS(decname) static const AVClass decname ## _decoder_class = {   \
     .class_name = #decname " decoder",      \
     .item_name  = av_default_item_name,     \
@@ -85,6 +89,7 @@ AVCodec ff_text_decoder = {
     .decode         = text_decode_frame,
     .init           = ff_ass_subtitle_header_default,
     .priv_class     = &text_decoder_class,
+    .flush          = text_flush,
 };
 #endif
 
@@ -110,6 +115,7 @@ AVCodec ff_vplayer_decoder = {
     .decode         = text_decode_frame,
     .init           = linebreak_init,
     .priv_class     = &vplayer_decoder_class,
+    .flush          = text_flush,
 };
 #endif
 
@@ -126,6 +132,7 @@ AVCodec ff_stl_decoder = {
     .decode         = text_decode_frame,
     .init           = linebreak_init,
     .priv_class     = &stl_decoder_class,
+    .flush          = text_flush,
 };
 #endif
 
@@ -142,6 +149,7 @@ AVCodec ff_pjs_decoder = {
     .decode         = text_decode_frame,
     .init           = linebreak_init,
     .priv_class     = &pjs_decoder_class,
+    .flush          = text_flush,
 };
 #endif
 
@@ -158,6 +166,7 @@ AVCodec ff_subviewer1_decoder = {
     .decode         = text_decode_frame,
     .init           = linebreak_init,
     .priv_class     = &subviewer1_decoder_class,
+    .flush          = text_flush,
 };
 #endif