/*
- Copyright (C) 2013-2015 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2013-2021 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
*/
-extern "C" {
-#include <libavcodec/avcodec.h>
-#include <libavformat/avformat.h>
-#include <libavutil/pixfmt.h>
-#include <libavutil/pixdesc.h>
-}
+
+#include "dcpomatic_log.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 <boost/foreach.hpp>
+#include "warnings.h"
+DCPOMATIC_DISABLE_WARNINGS
+extern "C" {
+#include <libavcodec/avcodec.h>
+#include <libavformat/avformat.h>
+#include <libavutil/pixfmt.h>
+#include <libavutil/pixdesc.h>
+#include <libavutil/eval.h>
+#include <libavutil/display.h>
+}
+DCPOMATIC_ENABLE_WARNINGS
#include <iostream>
#include "i18n.h"
-using std::string;
+
using std::cout;
+using std::make_shared;
using std::max;
-using boost::shared_ptr;
+using std::shared_ptr;
+using std::string;
+using std::vector;
using boost::optional;
+using namespace dcpomatic;
+
+
+/* This is how many frames from the start of any video that we will examine to see if we
+ * can spot soft 2:3 pull-down ("telecine").
+ */
+static const int PULLDOWN_CHECK_FRAMES = 16;
+
/** @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)
+ , _pulldown (false)
{
/* Find audio and subtitle streams */
for (uint32_t i = 0; i < _format_context->nb_streams; ++i) {
- AVStream* s = _format_context->streams[i];
- if (s->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
+ auto s = _format_context->streams[i];
+ auto codec = _codec_context[i] ? _codec_context[i]->codec : nullptr;
+ if (s->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && codec) {
/* This is a hack; sometimes it seems that _audio_codec_context->channel_layout isn't set up,
so bodge it here. No idea why we should have to do this.
*/
- if (s->codec->channel_layout == 0) {
- s->codec->channel_layout = av_get_default_channel_layout (s->codec->channels);
+ if (s->codecpar->channel_layout == 0) {
+ s->codecpar->channel_layout = av_get_default_channel_layout (s->codecpar->channels);
}
DCPOMATIC_ASSERT (_format_context->duration != AV_NOPTS_VALUE);
- DCPOMATIC_ASSERT (s->codec->codec);
- DCPOMATIC_ASSERT (s->codec->codec->name);
+ DCPOMATIC_ASSERT (codec->name);
_audio_streams.push_back (
- shared_ptr<FFmpegAudioStream> (
- new FFmpegAudioStream (
- stream_name (s),
- s->codec->codec->name,
- s->id,
- s->codec->sample_rate,
- (double (_format_context->duration) / AV_TIME_BASE) * s->codec->sample_rate,
- s->codec->channels
- )
+ make_shared<FFmpegAudioStream>(
+ stream_name (s),
+ codec->name,
+ s->id,
+ s->codecpar->sample_rate,
+ llrint ((double(_format_context->duration) / AV_TIME_BASE) * s->codecpar->sample_rate),
+ s->codecpar->channels
)
);
- } else if (s->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
- _subtitle_streams.push_back (shared_ptr<FFmpegSubtitleStream> (new FFmpegSubtitleStream (subtitle_stream_name (s), s->id)));
+ } else if (s->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE) {
+ _subtitle_streams.push_back (make_shared<FFmpegSubtitleStream>(subtitle_stream_name (s), s->id));
}
}
/* 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 ();
+ _video_length = llrint ((double (_format_context->duration) / AV_TIME_BASE) * video_frame_rate().get());
}
}
- if (job) {
- if (_need_video_length) {
- job->sub (_("Finding length and subtitles"));
- } else if (!_subtitle_streams.empty()) {
- job->sub (_("Finding subtitles"));
- } else {
- job->sub (_("Finding length"));
- }
+ if (job && _need_video_length) {
+ job->sub (_("Finding length"));
}
/* Run through until we find:
* - the first video.
* - the first audio for each stream.
- * - the subtitle periods for each stream.
- *
- * We have to note subtitle periods as otherwise we have no way of knowing
- * where we should look for subtitles (video and audio are always present,
- * so they are ok).
+ * - the top-field-first and repeat-first-frame values ("temporal_reference") for the first PULLDOWN_CHECK_FRAMES video frames.
*/
int64_t const len = _file_group.length ();
+ /* A string which we build up to describe the top-field-first and repeat-first-frame values for the first few frames.
+ * It would be nicer to use something like vector<bool> here but we want to search the array for a pattern later,
+ * and a string seems a reasonably neat way to do that.
+ */
+ string temporal_reference;
while (true) {
- int r = av_read_frame (_format_context, &_packet);
+ auto packet = av_packet_alloc ();
+ DCPOMATIC_ASSERT (packet);
+ int r = av_read_frame (_format_context, packet);
if (r < 0) {
+ av_packet_free (&packet);
break;
}
}
}
- AVCodecContext* context = _format_context->streams[_packet.stream_index]->codec;
+ auto context = _codec_context[packet->stream_index];
- if (_video_stream && _packet.stream_index == _video_stream.get()) {
- video_packet (context);
+ if (_video_stream && packet->stream_index == _video_stream.get()) {
+ video_packet (context, temporal_reference, packet);
}
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]->uses_index(_format_context, packet->stream_index)) {
+ audio_packet (context, _audio_streams[i], packet);
}
if (!_audio_streams[i]->first_audio) {
got_all_audio = false;
}
}
- for (size_t i = 0; i < _subtitle_streams.size(); ++i) {
- if (_subtitle_streams[i]->uses_index (_format_context, _packet.stream_index)) {
- subtitle_packet (context, _subtitle_streams[i]);
- }
- }
+ av_packet_free (&packet);
- av_packet_unref (&_packet);
-
- if (_first_video && got_all_audio && _subtitle_streams.empty ()) {
+ if (_first_video && got_all_audio && temporal_reference.size() >= (PULLDOWN_CHECK_FRAMES * 2)) {
/* All done */
break;
}
}
- /* 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))
- )
- );
+ if (_video_stream) {
+ auto context = _codec_context[_video_stream.get()];
+ while (video_packet(context, temporal_reference, nullptr)) {}
+ }
+
+ for (auto i: _audio_streams) {
+ auto context = _codec_context[i->index(_format_context)];
+ audio_packet(context, i, nullptr);
+ }
+
+ if (_video_stream) {
+ /* This code taken from get_rotation() in ffmpeg:cmdutils.c */
+ auto stream = _format_context->streams[*_video_stream];
+ auto rotate_tag = av_dict_get (stream->metadata, "rotate", 0, 0);
+ uint8_t* displaymatrix = av_stream_get_side_data (stream, AV_PKT_DATA_DISPLAYMATRIX, 0);
+ _rotation = 0;
+
+ if (rotate_tag && *rotate_tag->value && strcmp(rotate_tag->value, "0")) {
+ char *tail;
+ _rotation = av_strtod (rotate_tag->value, &tail);
+ if (*tail) {
+ _rotation = 0;
}
}
- }
- /* 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()));
+ if (displaymatrix && !_rotation) {
+ _rotation = - av_display_rotation_get ((int32_t*) displaymatrix);
}
+
+ _rotation = *_rotation - 360 * floor (*_rotation / 360 + 0.9 / 360);
+ }
+
+ LOG_GENERAL("Temporal reference was %1", temporal_reference);
+ if (temporal_reference.find("T2T3B2B3T2T3B2B3") != string::npos || temporal_reference.find("B2B3T2T3B2B3T2T3") != string::npos) {
+ /* The magical sequence (taken from mediainfo) suggests that 2:3 pull-down is in use */
+ _pulldown = true;
+ LOG_GENERAL_NC("Suggest that this may be 2:3 pull-down (soft telecine)");
}
}
-void
-FFmpegExaminer::video_packet (AVCodecContext* context)
+
+/** @param temporal_reference A string to which we should add two characters per frame;
+ * the first is T or B depending on whether it's top- or bottom-field first,
+ * the second is 3 or 2 depending on whether "repeat_pict" is true or not.
+ * @return true if some video was decoded, otherwise false.
+ */
+bool
+FFmpegExaminer::video_packet (AVCodecContext* context, string& temporal_reference, AVPacket* packet)
{
DCPOMATIC_ASSERT (_video_stream);
- if (_first_video && !_need_video_length) {
- return;
+ if (_first_video && !_need_video_length && temporal_reference.size() >= (PULLDOWN_CHECK_FRAMES * 2)) {
+ return false;
}
- 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 ());
- }
+ int r = avcodec_send_packet (context, packet);
+ if (r < 0 && !(r == AVERROR_EOF && !packet)) {
+ /* We could cope with AVERROR(EAGAIN) and re-send the packet but I think it should never happen.
+ * AVERROR_EOF can happen during flush if we've already sent a flush packet.
+ */
+ throw DecodeError (N_("avcodec_send_packet"), N_("FFmpegExaminer::video_packet"), r);
}
-}
-void
-FFmpegExaminer::audio_packet (AVCodecContext* context, shared_ptr<FFmpegAudioStream> stream)
-{
- if (stream->first_audio) {
- return;
+ r = avcodec_receive_frame (context, _frame);
+ if (r == AVERROR(EAGAIN)) {
+ /* More input is required */
+ return true;
+ } else if (r == AVERROR_EOF) {
+ /* No more output is coming */
+ return false;
}
- int frame_finished;
- if (avcodec_decode_audio4 (context, _frame, &frame_finished, &_packet) >= 0 && frame_finished) {
- stream->first_audio = frame_time (stream->stream (_format_context));
+ 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 ());
}
+ if (temporal_reference.size() < (PULLDOWN_CHECK_FRAMES * 2)) {
+ temporal_reference += (_frame->top_field_first ? "T" : "B");
+ temporal_reference += (_frame->repeat_pict ? "3" : "2");
+ }
+
+ return true;
}
+
void
-FFmpegExaminer::subtitle_packet (AVCodecContext* context, shared_ptr<FFmpegSubtitleStream> stream)
+FFmpegExaminer::audio_packet (AVCodecContext* context, shared_ptr<FFmpegAudioStream> stream, AVPacket* packet)
{
- 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);
-
- /* Some streams (notably DVB streams) have subtitles which have a specified end time
- but which are then stopped earlier than this by a zero-num_rect subtitle.
- */
-
- LastSubtitleMap::iterator last = _last_subtitle_start.find (stream);
- if (sub.num_rects == 0 && last != _last_subtitle_start.end() && last->second) {
- /* Set (or fix) the `to' time for the last subtitle */
- stream->set_subtitle_to (last->second->id, period.from);
- _last_subtitle_start[stream] = optional<SubtitleStart> ();
- } else if (sub.num_rects > 0) {
- /* Add a subtitle; if we don't know the `to' time we set it to the from time and fix it later */
- if (starts_image) {
- stream->add_image_subtitle (id, ContentTimePeriod (period.from, period.to.get_value_or (period.from)));
- } else {
- stream->add_text_subtitle (id, ContentTimePeriod (period.from, period.to.get_value_or (period.from)));
- }
-
- _last_subtitle_start[stream] = SubtitleStart (id, starts_image, period.from);
- }
+ if (stream->first_audio) {
+ return;
+ }
- 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
- }
- }
+ int r = avcodec_send_packet (context, packet);
+ if (r < 0 && !(r == AVERROR_EOF && !packet) && r != AVERROR(EAGAIN)) {
+ /* We could cope with AVERROR(EAGAIN) and re-send the packet but I think it should never happen.
+ * AVERROR_EOF can happen during flush if we've already sent a flush packet.
+ * EAGAIN means we need to do avcodec_receive_frame, so just carry on and do that.
+ */
+ throw DecodeError (N_("avcodec_send_packet"), N_("FFmpegExaminer::audio_packet"), r);
+ }
- avsubtitle_free (&sub);
+ if (avcodec_receive_frame (context, _frame) < 0) {
+ return;
}
+
+ stream->first_audio = frame_time (stream->stream(_format_context));
}
+
optional<ContentTime>
FFmpegExaminer::frame_time (AVStream* s) const
{
optional<ContentTime> t;
- int64_t const bet = av_frame_get_best_effort_timestamp (_frame);
+ int64_t const bet = _frame->best_effort_timestamp;
if (bet != AV_NOPTS_VALUE) {
t = ContentTime::from_seconds (bet * av_q2d (s->time_base));
}
return t;
}
+
optional<double>
FFmpegExaminer::video_frame_rate () const
{
DCPOMATIC_ASSERT (_video_stream);
- /* This use of r_frame_rate is debateable; there's a few different
- * frame rates in the format context, but this one seems to be the most
- * reliable.
- */
- return av_q2d (av_stream_get_r_frame_rate (_format_context->streams[_video_stream.get()]));
+ return av_q2d(av_guess_frame_rate(_format_context, _format_context->streams[_video_stream.get()], 0));
}
+
dcp::Size
FFmpegExaminer::video_size () const
{
return dcp::Size (video_codec_context()->width, video_codec_context()->height);
}
+
/** @return Length according to our content's header */
Frame
FFmpegExaminer::video_length () const
return max (Frame (1), _video_length);
}
+
optional<double>
FFmpegExaminer::sample_aspect_ratio () const
{
DCPOMATIC_ASSERT (_video_stream);
- AVRational sar = av_guess_sample_aspect_ratio (_format_context, _format_context->streams[_video_stream.get()], 0);
+ auto sar = av_guess_sample_aspect_ratio (_format_context, _format_context->streams[_video_stream.get()], 0);
if (sar.num == 0) {
/* I assume this means that we don't know */
- return optional<double> ();
+ return {};
}
return double (sar.num) / sar.den;
}
+
string
FFmpegExaminer::subtitle_stream_name (AVStream* s) const
{
- string n = stream_name (s);
+ auto n = stream_name (s);
if (n.empty()) {
n = _("unknown");
return n;
}
+
string
FFmpegExaminer::stream_name (AVStream* s) const
{
string n;
if (s->metadata) {
- AVDictionaryEntry const * lang = av_dict_get (s->metadata, "language", 0, 0);
+ auto 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);
+ auto const title = av_dict_get (s->metadata, "title", 0, 0);
if (title) {
if (!n.empty()) {
n += " ";
return n;
}
-int
+
+optional<int>
FFmpegExaminer::bits_per_pixel () const
{
if (video_codec_context()->pix_fmt == -1) {
- throw DecodeError (_("Could not find pixel format for video."));
+ return {};
}
- AVPixFmtDescriptor const * d = av_pix_fmt_desc_get (video_codec_context()->pix_fmt);
+ auto const d = av_pix_fmt_desc_get (video_codec_context()->pix_fmt);
DCPOMATIC_ASSERT (d);
return av_get_bits_per_pixel (d);
}
+
bool
FFmpegExaminer::yuv () const
{
}
}
+
bool
FFmpegExaminer::has_video () const
{
- return static_cast<bool> (_video_stream);
+ return static_cast<bool>(_video_stream);
+}
+
+
+VideoRange
+FFmpegExaminer::range () const
+{
+ switch (color_range()) {
+ case AVCOL_RANGE_MPEG:
+ case AVCOL_RANGE_UNSPECIFIED:
+ return VideoRange::VIDEO;
+ case AVCOL_RANGE_JPEG:
+ default:
+ return VideoRange::FULL;
+ }
}
projects / dcpomatic.git / blobdiff