summaryrefslogtreecommitdiff
path: root/src/lib/ffmpeg_content.cc
diff options
context:
space:
mode:
Diffstat (limited to 'src/lib/ffmpeg_content.cc')
-rw-r--r--src/lib/ffmpeg_content.cc359
1 files changed, 359 insertions, 0 deletions
diff --git a/src/lib/ffmpeg_content.cc b/src/lib/ffmpeg_content.cc
new file mode 100644
index 000000000..55139ca56
--- /dev/null
+++ b/src/lib/ffmpeg_content.cc
@@ -0,0 +1,359 @@
+/* -*- c-basic-offset: 8; default-tab-width: 8; -*- */
+
+/*
+ Copyright (C) 2013 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
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include <libcxml/cxml.h>
+#include "ffmpeg_content.h"
+#include "ffmpeg_decoder.h"
+#include "compose.hpp"
+#include "job.h"
+#include "util.h"
+#include "filter.h"
+#include "log.h"
+
+#include "i18n.h"
+
+using std::string;
+using std::stringstream;
+using std::vector;
+using std::list;
+using std::cout;
+using boost::shared_ptr;
+using boost::lexical_cast;
+
+int const FFmpegContentProperty::SUBTITLE_STREAMS = 100;
+int const FFmpegContentProperty::SUBTITLE_STREAM = 101;
+int const FFmpegContentProperty::AUDIO_STREAMS = 102;
+int const FFmpegContentProperty::AUDIO_STREAM = 103;
+int const FFmpegContentProperty::FILTERS = 104;
+
+FFmpegContent::FFmpegContent (shared_ptr<const Film> f, boost::filesystem::path p)
+ : Content (f, p)
+ , VideoContent (f, p)
+ , AudioContent (f, p)
+{
+
+}
+
+FFmpegContent::FFmpegContent (shared_ptr<const Film> f, shared_ptr<const cxml::Node> node)
+ : Content (f, node)
+ , VideoContent (f, node)
+ , AudioContent (f, node)
+{
+ list<shared_ptr<cxml::Node> > c = node->node_children ("SubtitleStream");
+ for (list<shared_ptr<cxml::Node> >::const_iterator i = c.begin(); i != c.end(); ++i) {
+ _subtitle_streams.push_back (shared_ptr<FFmpegSubtitleStream> (new FFmpegSubtitleStream (*i)));
+ if ((*i)->optional_number_child<int> ("Selected")) {
+ _subtitle_stream = _subtitle_streams.back ();
+ }
+ }
+
+ c = node->node_children ("AudioStream");
+ for (list<shared_ptr<cxml::Node> >::const_iterator i = c.begin(); i != c.end(); ++i) {
+ _audio_streams.push_back (shared_ptr<FFmpegAudioStream> (new FFmpegAudioStream (*i)));
+ if ((*i)->optional_number_child<int> ("Selected")) {
+ _audio_stream = _audio_streams.back ();
+ }
+ }
+
+ c = node->node_children ("Filter");
+ for (list<shared_ptr<cxml::Node> >::iterator i = c.begin(); i != c.end(); ++i) {
+ _filters.push_back (Filter::from_id ((*i)->content ()));
+ }
+}
+
+FFmpegContent::FFmpegContent (FFmpegContent const & o)
+ : Content (o)
+ , VideoContent (o)
+ , AudioContent (o)
+ , _subtitle_streams (o._subtitle_streams)
+ , _subtitle_stream (o._subtitle_stream)
+ , _audio_streams (o._audio_streams)
+ , _audio_stream (o._audio_stream)
+{
+
+}
+
+void
+FFmpegContent::as_xml (xmlpp::Node* node) const
+{
+ node->add_child("Type")->add_child_text ("FFmpeg");
+ Content::as_xml (node);
+ VideoContent::as_xml (node);
+ AudioContent::as_xml (node);
+
+ boost::mutex::scoped_lock lm (_mutex);
+
+ for (vector<shared_ptr<FFmpegSubtitleStream> >::const_iterator i = _subtitle_streams.begin(); i != _subtitle_streams.end(); ++i) {
+ xmlpp::Node* t = node->add_child("SubtitleStream");
+ if (_subtitle_stream && *i == _subtitle_stream) {
+ t->add_child("Selected")->add_child_text("1");
+ }
+ (*i)->as_xml (t);
+ }
+
+ for (vector<shared_ptr<FFmpegAudioStream> >::const_iterator i = _audio_streams.begin(); i != _audio_streams.end(); ++i) {
+ xmlpp::Node* t = node->add_child("AudioStream");
+ if (_audio_stream && *i == _audio_stream) {
+ t->add_child("Selected")->add_child_text("1");
+ }
+ (*i)->as_xml (t);
+ }
+
+ for (vector<Filter const *>::const_iterator i = _filters.begin(); i != _filters.end(); ++i) {
+ node->add_child("Filter")->add_child_text ((*i)->id ());
+ }
+}
+
+void
+FFmpegContent::examine (shared_ptr<Job> job)
+{
+ job->set_progress_unknown ();
+
+ Content::examine (job);
+
+ shared_ptr<const Film> film = _film.lock ();
+ assert (film);
+
+ shared_ptr<FFmpegDecoder> decoder (new FFmpegDecoder (film, shared_from_this (), true, false, false));
+
+ ContentVideoFrame video_length = 0;
+ video_length = decoder->video_length ();
+ film->log()->log (String::compose ("Video length obtained from header as %1 frames", decoder->video_length ()));
+
+ {
+ boost::mutex::scoped_lock lm (_mutex);
+
+ _video_length = video_length;
+
+ _subtitle_streams = decoder->subtitle_streams ();
+ if (!_subtitle_streams.empty ()) {
+ _subtitle_stream = _subtitle_streams.front ();
+ }
+
+ _audio_streams = decoder->audio_streams ();
+ if (!_audio_streams.empty ()) {
+ _audio_stream = _audio_streams.front ();
+ }
+ }
+
+ take_from_video_decoder (decoder);
+
+ signal_changed (VideoContentProperty::VIDEO_LENGTH);
+ signal_changed (FFmpegContentProperty::SUBTITLE_STREAMS);
+ signal_changed (FFmpegContentProperty::SUBTITLE_STREAM);
+ signal_changed (FFmpegContentProperty::AUDIO_STREAMS);
+ signal_changed (FFmpegContentProperty::AUDIO_STREAM);
+ signal_changed (AudioContentProperty::AUDIO_CHANNELS);
+}
+
+string
+FFmpegContent::summary () const
+{
+ return String::compose (_("Movie: %1"), file().filename().string());
+}
+
+string
+FFmpegContent::information () const
+{
+ if (video_length() == 0 || video_frame_rate() == 0) {
+ return "";
+ }
+
+ stringstream s;
+
+ s << String::compose (_("%1 frames; %2 frames per second"), video_length(), video_frame_rate()) << "\n";
+ s << VideoContent::information ();
+
+ return s.str ();
+}
+
+void
+FFmpegContent::set_subtitle_stream (shared_ptr<FFmpegSubtitleStream> s)
+{
+ {
+ boost::mutex::scoped_lock lm (_mutex);
+ _subtitle_stream = s;
+ }
+
+ signal_changed (FFmpegContentProperty::SUBTITLE_STREAM);
+}
+
+void
+FFmpegContent::set_audio_stream (shared_ptr<FFmpegAudioStream> s)
+{
+ {
+ boost::mutex::scoped_lock lm (_mutex);
+ _audio_stream = s;
+ }
+
+ signal_changed (FFmpegContentProperty::AUDIO_STREAM);
+}
+
+ContentAudioFrame
+FFmpegContent::audio_length () const
+{
+ int const cafr = content_audio_frame_rate ();
+ int const vfr = video_frame_rate ();
+ ContentVideoFrame const vl = video_length ();
+
+ boost::mutex::scoped_lock lm (_mutex);
+ if (!_audio_stream) {
+ return 0;
+ }
+
+ return video_frames_to_audio_frames (vl, cafr, vfr);
+}
+
+int
+FFmpegContent::audio_channels () const
+{
+ boost::mutex::scoped_lock lm (_mutex);
+
+ if (!_audio_stream) {
+ return 0;
+ }
+
+ return _audio_stream->channels;
+}
+
+int
+FFmpegContent::content_audio_frame_rate () const
+{
+ boost::mutex::scoped_lock lm (_mutex);
+
+ if (!_audio_stream) {
+ return 0;
+ }
+
+ return _audio_stream->frame_rate;
+}
+
+int
+FFmpegContent::output_audio_frame_rate () const
+{
+ shared_ptr<const Film> film = _film.lock ();
+ assert (film);
+
+ /* Resample to a DCI-approved sample rate */
+ double t = dcp_audio_frame_rate (content_audio_frame_rate ());
+
+ FrameRateConversion frc (video_frame_rate(), film->dcp_video_frame_rate());
+
+ /* Compensate if the DCP is being run at a different frame rate
+ to the source; that is, if the video is run such that it will
+ look different in the DCP compared to the source (slower or faster).
+ skip/repeat doesn't come into effect here.
+ */
+
+ if (frc.change_speed) {
+ t *= video_frame_rate() * frc.factor() / film->dcp_video_frame_rate();
+ }
+
+ return rint (t);
+}
+
+bool
+operator== (FFmpegSubtitleStream const & a, FFmpegSubtitleStream const & b)
+{
+ return a.id == b.id;
+}
+
+bool
+operator== (FFmpegAudioStream const & a, FFmpegAudioStream const & b)
+{
+ return a.id == b.id;
+}
+
+FFmpegAudioStream::FFmpegAudioStream (shared_ptr<const cxml::Node> node)
+{
+ name = node->string_child ("Name");
+ id = node->number_child<int> ("Id");
+ frame_rate = node->number_child<int> ("FrameRate");
+ channels = node->number_child<int64_t> ("Channels");
+ mapping = AudioMapping (node->node_child ("Mapping"));
+}
+
+void
+FFmpegAudioStream::as_xml (xmlpp::Node* root) const
+{
+ root->add_child("Name")->add_child_text (name);
+ root->add_child("Id")->add_child_text (lexical_cast<string> (id));
+ root->add_child("FrameRate")->add_child_text (lexical_cast<string> (frame_rate));
+ root->add_child("Channels")->add_child_text (lexical_cast<string> (channels));
+ mapping.as_xml (root->add_child("Mapping"));
+}
+
+/** Construct a SubtitleStream from a value returned from to_string().
+ * @param t String returned from to_string().
+ * @param v State file version.
+ */
+FFmpegSubtitleStream::FFmpegSubtitleStream (shared_ptr<const cxml::Node> node)
+{
+ name = node->string_child ("Name");
+ id = node->number_child<int> ("Id");
+}
+
+void
+FFmpegSubtitleStream::as_xml (xmlpp::Node* root) const
+{
+ root->add_child("Name")->add_child_text (name);
+ root->add_child("Id")->add_child_text (lexical_cast<string> (id));
+}
+
+shared_ptr<Content>
+FFmpegContent::clone () const
+{
+ return shared_ptr<Content> (new FFmpegContent (*this));
+}
+
+Time
+FFmpegContent::length () const
+{
+ shared_ptr<const Film> film = _film.lock ();
+ assert (film);
+
+ FrameRateConversion frc (video_frame_rate (), film->dcp_video_frame_rate ());
+ return video_length() * frc.factor() * TIME_HZ / film->dcp_video_frame_rate ();
+}
+
+AudioMapping
+FFmpegContent::audio_mapping () const
+{
+ boost::mutex::scoped_lock lm (_mutex);
+
+ if (!_audio_stream) {
+ return AudioMapping ();
+ }
+
+ return _audio_stream->mapping;
+}
+
+void
+FFmpegContent::set_filters (vector<Filter const *> const & filters)
+{
+ {
+ boost::mutex::scoped_lock lm (_mutex);
+ _filters = filters;
+ }
+
+ signal_changed (FFmpegContentProperty::FILTERS);
+}
+
generated by cgit v1.2.3 (git 2.46.0) at 2026-04-28 18:51:26 +0000