X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fffmpeg_decoder.cc;h=a2b3e5d3bfdead6a8fe07a44489c87440bc228ab;hb=ae9b0b509787d244366eb8f69bdf9d563b6c6bb6;hp=dae0ddbe8924b2b65fa8657a455a01128555b50f;hpb=d7b23d44dec9d6357619e8e009e564e475215470;p=dcpomatic.git

diff --git a/src/lib/ffmpeg_decoder.cc b/src/lib/ffmpeg_decoder.cc
index dae0ddbe8..a2b3e5d3b 100644
--- a/src/lib/ffmpeg_decoder.cc
+++ b/src/lib/ffmpeg_decoder.cc
@@ -561,7 +561,7 @@ FFmpegDecoder::decode_subtitle_packet ()
 	/* Subtitle PTS in seconds (within the source, not taking into account any of the
 	   source that we may have chopped off for the DCP)
 	*/
-	double const packet_time = static_cast<double> (sub.pts) / AV_TIME_BASE;
+	double const packet_time = (static_cast<double> (sub.pts ) / AV_TIME_BASE) + _video_pts_offset;
 	
 	/* hence start time for this sub */
 	ContentTime const from = (packet_time + (double (sub.start_display_time) / 1e3)) * TIME_HZ;
@@ -572,21 +572,27 @@ FFmpegDecoder::decode_subtitle_packet ()
 	if (rect->type != SUBTITLE_BITMAP) {
 		throw DecodeError (_("non-bitmap subtitles not yet supported"));
 	}
-	
+
+	/* Note RGBA is expressed little-endian, so the first byte in the word is R, second
+	   G, third B, fourth A.
+	*/
 	shared_ptr<Image> image (new Image (PIX_FMT_RGBA, libdcp::Size (rect->w, rect->h), true));
 
 	/* Start of the first line in the subtitle */
 	uint8_t* sub_p = rect->pict.data[0];
-	/* sub_p looks up into a RGB palette which is here */
+	/* sub_p looks up into a BGRA palette which is here
+	   (i.e. first byte B, second G, third R, fourth A)
+	*/
 	uint32_t const * palette = (uint32_t *) rect->pict.data[1];
 	/* Start of the output data */
 	uint32_t* out_p = (uint32_t *) image->data()[0];
-	
+
 	for (int y = 0; y < rect->h; ++y) {
 		uint8_t* sub_line_p = sub_p;
 		uint32_t* out_line_p = out_p;
 		for (int x = 0; x < rect->w; ++x) {
-			*out_line_p++ = palette[*sub_line_p++];
+			uint32_t const p = palette[*sub_line_p++];
+			*out_line_p++ = ((p & 0xff) << 16) | (p & 0xff00) | ((p & 0xff0000) >> 16) | (p & 0xff000000);
 		}
 		sub_p += rect->pict.linesize[0];
 		out_p += image->stride()[0] / sizeof (uint32_t);