+ }
+ avctx->properties |= FF_CODEC_PROPERTY_CLOSED_CAPTIONS;
+ }
+ return 1;
+ } else if (buf_size >= 2 &&
+ p[0] == 0x03 && (p[1]&0x7f) == 0x01) {
+ /* extract SCTE-20 CC data */
+ GetBitContext gb;
+ int cc_count = 0;
+ int i;
+
+ init_get_bits(&gb, p + 2, buf_size - 2);
+ cc_count = get_bits(&gb, 5);
+ if (cc_count > 0) {
+ av_freep(&s1->a53_caption);
+ s1->a53_caption_size = cc_count * 3;
+ s1->a53_caption = av_mallocz(s1->a53_caption_size);
+ if (!s1->a53_caption) {
+ s1->a53_caption_size = 0;
+ } else {
+ uint8_t field, cc1, cc2;
+ uint8_t *cap = s1->a53_caption;
+ for (i = 0; i < cc_count && get_bits_left(&gb) >= 26; i++) {
+ skip_bits(&gb, 2); // priority
+ field = get_bits(&gb, 2);
+ skip_bits(&gb, 5); // line_offset
+ cc1 = get_bits(&gb, 8);
+ cc2 = get_bits(&gb, 8);
+ skip_bits(&gb, 1); // marker
+
+ if (!field) { // forbidden
+ cap[0] = cap[1] = cap[2] = 0x00;
+ } else {
+ field = (field == 2 ? 1 : 0);
+ if (!s1->mpeg_enc_ctx.top_field_first) field = !field;
+ cap[0] = 0x04 | field;
+ cap[1] = ff_reverse[cc1];
+ cap[2] = ff_reverse[cc2];
+ }
+ cap += 3;
+ }
+ }