extern "C" {
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
+#include <libavutil/pixfmt.h>
+#include <libavutil/pixdesc.h>
}
#include "ffmpeg_examiner.h"
#include "ffmpeg_content.h"
+#include "job.h"
#include "ffmpeg_audio_stream.h"
#include "ffmpeg_subtitle_stream.h"
#include "util.h"
#include "safe_stringstream.h"
+#include <boost/foreach.hpp>
+#include <iostream>
#include "i18n.h"
using boost::shared_ptr;
using boost::optional;
-FFmpegExaminer::FFmpegExaminer (shared_ptr<const FFmpegContent> c)
+/** @param job job that the examiner is operating in, or 0 */
+FFmpegExaminer::FFmpegExaminer (shared_ptr<const FFmpegContent> c, shared_ptr<Job> job)
: FFmpeg (c)
+ , _video_length (0)
, _need_video_length (false)
{
/* Find audio and subtitle streams */
if (s->codec->channel_layout == 0) {
s->codec->channel_layout = av_get_default_channel_layout (s->codec->channels);
}
-
+
_audio_streams.push_back (
shared_ptr<FFmpegAudioStream> (
new FFmpegAudioStream (audio_stream_name (s), s->id, s->codec->sample_rate, s->codec->channels)
/* See if the header has duration information in it */
_need_video_length = _format_context->duration == AV_NOPTS_VALUE;
if (!_need_video_length) {
- _video_length = ContentTime::from_seconds (double (_format_context->duration) / AV_TIME_BASE);
+ _video_length = (double (_format_context->duration) / AV_TIME_BASE) * video_frame_rate().get ();
+ } else if (job) {
+ job->sub (_("Finding length"));
+ job->set_progress_unknown ();
+ }
+
+ if (job) {
+ job->sub (_("Finding subtitles"));
}
/* Run through until we find:
* where we should look for subtitles (video and audio are always present,
* so they are ok).
*/
+
while (true) {
int r = av_read_frame (_format_context, &_packet);
if (r < 0) {
break;
}
+ if (job) {
+ job->set_progress_unknown ();
+ }
+
AVCodecContext* context = _format_context->streams[_packet.stream_index]->codec;
if (_packet.stream_index == _video_stream) {
video_packet (context);
}
-
+
+ bool got_all_audio = true;
+
for (size_t i = 0; i < _audio_streams.size(); ++i) {
if (_audio_streams[i]->uses_index (_format_context, _packet.stream_index)) {
audio_packet (context, _audio_streams[i]);
}
+ if (!_audio_streams[i]->first_audio) {
+ got_all_audio = false;
+ }
}
for (size_t i = 0; i < _subtitle_streams.size(); ++i) {
}
av_free_packet (&_packet);
+
+ if (_first_video && got_all_audio && _subtitle_streams.empty ()) {
+ /* All done */
+ break;
+ }
+ }
+
+ for (LastSubtitleMap::const_iterator i = _last_subtitle_start.begin(); i != _last_subtitle_start.end(); ++i) {
+ if (i->second) {
+ i->first->add_subtitle (
+ ContentTimePeriod (
+ i->second.get (),
+ 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 (video_frame_rate()) {
+ BOOST_FOREACH (shared_ptr<FFmpegSubtitleStream> i, _subtitle_streams) {
+ i->add_offset (pts_offset (_audio_streams, _first_video, video_frame_rate().get()));
+ }
}
}
_first_video = frame_time (_format_context->streams[_video_stream]);
}
if (_need_video_length) {
- _video_length = frame_time (_format_context->streams[_video_stream]).get_value_or (ContentTime ());
+ _video_length = frame_time (
+ _format_context->streams[_video_stream]
+ ).get_value_or (ContentTime ()).frames_round (video_frame_rate().get ());
}
}
}
int frame_finished;
AVSubtitle sub;
if (avcodec_decode_subtitle2 (context, &sub, &frame_finished, &_packet) >= 0 && frame_finished) {
- ContentTimePeriod const period = subtitle_period (sub);
- if (sub.num_rects == 0 && !stream->periods.empty () && stream->periods.back().to > period.from) {
- /* Finish the last subtitle */
- stream->periods.back().to = period.from;
+ FFmpegSubtitlePeriod const period = subtitle_period (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 */
+ stream->add_subtitle (ContentTimePeriod (last->second.get (), period.from));
+ if (sub.num_rects == 0) {
+ /* This is a `proper' end-of-subtitle */
+ _last_subtitle_start[stream] = optional<ContentTime> ();
+ } else {
+ /* This is just another subtitle, so we start again */
+ _last_subtitle_start[stream] = period.from;
+ }
} else if (sub.num_rects == 1) {
- stream->periods.push_back (period);
+ if (period.to) {
+ stream->add_subtitle (ContentTimePeriod (period.from, period.to.get ()));
+ } else {
+ _last_subtitle_start[stream] = period.from;
+ }
}
+ avsubtitle_free (&sub);
}
}
FFmpegExaminer::frame_time (AVStream* s) const
{
optional<ContentTime> t;
-
+
int64_t const bet = av_frame_get_best_effort_timestamp (_frame);
if (bet != AV_NOPTS_VALUE) {
t = ContentTime::from_seconds (bet * av_q2d (s->time_base));
return t;
}
-optional<float>
+optional<double>
FFmpegExaminer::video_frame_rate () const
{
/* This use of r_frame_rate is debateable; there's a few different
}
/** @return Length according to our content's header */
-ContentTime
+Frame
FFmpegExaminer::video_length () const
{
- ContentTime const length = ContentTime::from_seconds (double (_format_context->duration) / AV_TIME_BASE);
- return ContentTime (max (ContentTime (1), _video_length));
+ return max (Frame (1), _video_length);
}
-optional<float>
+optional<double>
FFmpegExaminer::sample_aspect_ratio () const
{
AVRational sar = av_guess_sample_aspect_ratio (_format_context, _format_context->streams[_video_stream], 0);
if (sar.num == 0) {
/* I assume this means that we don't know */
- return optional<float> ();
+ return optional<double> ();
}
- return float (sar.num) / sar.den;
+ return double (sar.num) / sar.den;
}
string
if (lang) {
n << lang->value;
}
-
+
AVDictionaryEntry const * title = av_dict_get (s->metadata, "title", 0, 0);
if (title) {
if (!n.str().empty()) {
return n.str ();
}
+
+int
+FFmpegExaminer::bits_per_pixel () const
+{
+ return av_get_bits_per_pixel (av_pix_fmt_desc_get (video_codec_context()->pix_fmt));
+}
projects / dcpomatic.git / blobdiff