+
+ /* Finish off any hanging subtitles at the end */
+ for (LastSubtitleMap::const_iterator i = _last_subtitle_start.begin(); i != _last_subtitle_start.end(); ++i) {
+ if (i->second) {
+ if (i->second->image) {
+ i->first->add_image_subtitle (
+ i->second->id,
+ ContentTimePeriod (
+ i->second->time,
+ ContentTime::from_frames (video_length(), video_frame_rate().get_value_or (24))
+ )
+ );
+ } else {
+ i->first->add_text_subtitle (
+ i->second->id,
+ ContentTimePeriod (
+ i->second->time,
+ ContentTime::from_frames (video_length(), video_frame_rate().get_value_or (24))
+ )
+ );
+ }
+ }
+ }
+
+ /* We just added subtitles to our streams without taking the PTS offset into account;
+ this is because we might not know the PTS offset when the first subtitle is seen.
+ Now we know the PTS offset so we can apply it to those subtitles.
+ */
+ if (has_video() && video_frame_rate()) {
+ BOOST_FOREACH (shared_ptr<FFmpegSubtitleStream> i, _subtitle_streams) {
+ i->add_offset (pts_offset (_audio_streams, _first_video, video_frame_rate().get()));
+ }
+ }
+}
+
+void
+FFmpegExaminer::video_packet (AVCodecContext* context)
+{
+ DCPOMATIC_ASSERT (_video_stream);
+
+ if (_first_video && !_need_video_length) {
+ return;
+ }
+
+ int frame_finished;
+ if (avcodec_decode_video2 (context, _frame, &frame_finished, &_packet) >= 0 && frame_finished) {
+ if (!_first_video) {
+ _first_video = frame_time (_format_context->streams[_video_stream.get()]);
+ }
+ if (_need_video_length) {
+ _video_length = frame_time (
+ _format_context->streams[_video_stream.get()]
+ ).get_value_or (ContentTime ()).frames_round (video_frame_rate().get ());
+ }
+ }
+}
+
+void
+FFmpegExaminer::audio_packet (AVCodecContext* context, shared_ptr<FFmpegAudioStream> stream)
+{
+ if (stream->first_audio) {
+ return;
+ }
+
+ int frame_finished;
+ if (avcodec_decode_audio4 (context, _frame, &frame_finished, &_packet) >= 0 && frame_finished) {
+ stream->first_audio = frame_time (stream->stream (_format_context));
+ }
+}
+
+void
+FFmpegExaminer::subtitle_packet (AVCodecContext* context, shared_ptr<FFmpegSubtitleStream> stream)
+{
+ int frame_finished;
+ AVSubtitle sub;
+ if (avcodec_decode_subtitle2 (context, &sub, &frame_finished, &_packet) >= 0 && frame_finished) {
+ string id = subtitle_id (sub);
+ FFmpegSubtitlePeriod const period = subtitle_period (sub);
+ bool const starts_image = subtitle_starts_image (sub);
+
+ LastSubtitleMap::iterator last = _last_subtitle_start.find (stream);
+ if (last != _last_subtitle_start.end() && last->second) {
+ /* We have seen the start of a subtitle but not yet the end. Whatever this is
+ finishes the previous subtitle, so add it */
+ if (last->second->image) {
+ stream->add_image_subtitle (last->second->id, ContentTimePeriod (last->second->time, period.from));
+ } else {
+ stream->add_text_subtitle (last->second->id, ContentTimePeriod (last->second->time, period.from));
+ }
+ if (sub.num_rects == 0) {
+ /* This is a `proper' end-of-subtitle */
+ _last_subtitle_start[stream] = optional<SubtitleStart> ();
+ } else {
+ /* This is just another subtitle, so we start again */
+ _last_subtitle_start[stream] = SubtitleStart (id, starts_image, period.from);
+ }
+ } else if (sub.num_rects == 1) {
+ if (period.to) {
+ if (starts_image) {
+ stream->add_image_subtitle (id, ContentTimePeriod (period.from, period.to.get ()));
+ } else {
+ stream->add_text_subtitle (id, ContentTimePeriod (period.from, period.to.get ()));
+ }
+ } else {
+ _last_subtitle_start[stream] = SubtitleStart (id, starts_image, period.from);
+ }
+ }
+
+ for (unsigned int i = 0; i < sub.num_rects; ++i) {
+ if (sub.rects[i]->type == SUBTITLE_BITMAP) {
+#ifdef DCPOMATIC_HAVE_AVSUBTITLERECT_PICT
+ uint32_t* palette = (uint32_t *) sub.rects[i]->pict.data[1];
+ for (int j = 0; j < sub.rects[i]->nb_colors; ++j) {
+ RGBA rgba (
+ (palette[j] & 0x00ff0000) >> 16,
+ (palette[j] & 0x0000ff00) >> 8,
+ (palette[j] & 0x000000ff) >> 0,
+ (palette[j] & 0xff000000) >> 24
+ );
+
+ stream->set_colour (rgba, rgba);
+ }
+#else
+ uint32_t* palette = (uint32_t *) sub.rects[i]->data[1];
+ for (int j = 0; j < sub.rects[i]->nb_colors; ++j) {
+ RGBA rgba (
+ (palette[j] & 0x00ff0000) >> 16,
+ (palette[j] & 0x0000ff00) >> 8,
+ (palette[j] & 0x000000ff) >> 0,
+ (palette[j] & 0xff000000) >> 24
+ );
+
+ stream->set_colour (rgba, rgba);
+ }
+#endif
+ }
+ }
+
+ avsubtitle_free (&sub);
+ }