/*
- Copyright (C) 2013-2014 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2013-2015 Carl Hetherington <cth@carlh.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
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 "i18n.h"
using std::string;
using std::cout;
using std::max;
-using std::stringstream;
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 = (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:
* - the first video.
* - the first audio for each stream.
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);
}
-
+
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]);
void
FFmpegExaminer::video_packet (AVCodecContext* context)
{
- if (_first_video) {
+ if (_first_video && !_need_video_length) {
return;
}
int frame_finished;
if (avcodec_decode_video2 (context, _frame, &frame_finished, &_packet) >= 0 && frame_finished) {
- _first_video = frame_time (_format_context->streams[_video_stream]);
+ if (!_first_video) {
+ _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 ()).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);
+ if (sub.num_rects <= 0 && _last_subtitle_start) {
+ stream->add_subtitle (ContentTimePeriod (_last_subtitle_start.get (), period.from));
+ _last_subtitle_start = optional<ContentTime> ();
} 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 = 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;
}
-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 - _format_context->start_time) / AV_TIME_BASE);
- return ContentTime (max (ContentTime::Type (1), length.get ()));
+ return max (Frame (1), _video_length);
+}
+
+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<double> ();
+ }
+ return double (sar.num) / sar.den;
}
string
FFmpegExaminer::audio_stream_name (AVStream* s) const
{
- stringstream n;
+ SafeStringStream n;
n << stream_name (s);
string
FFmpegExaminer::subtitle_stream_name (AVStream* s) const
{
- stringstream n;
+ SafeStringStream n;
n << stream_name (s);
string
FFmpegExaminer::stream_name (AVStream* s) const
{
- stringstream n;
+ SafeStringStream n;
if (s->metadata) {
AVDictionaryEntry const * lang = av_dict_get (s->metadata, "language", 0, 0);
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));
+}