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+ y="22.094482">FFmpeg sources are by far the most complicated, so we consider those only.</tspan><tspan
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+ id="tspan4675">Hardest video case:</tspan><tspan
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+ sodipodi:role="line"
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+ id="tspan4657">Emission is timestamped with _video_position.</tspan><tspan
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+ sodipodi:role="line"
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+ sodipodi:role="line"
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+ id="tspan4797" /><tspan
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+ id="tspan4799">Timestamps are not sample-accurate, here B should be after A but its timestamp says different. Things</tspan><tspan
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+ id="tspan4801">are further complicated by resampling, which renders timestamps invalid. The upshot is that audio</tspan><tspan
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--- /dev/null
+\documentclass{article}
+\begin{document}
+
+There is a lot of dancing about to handle potential gaps and sync
+problems in the FFmpeg decoder. It might be nicer if
+\texttt{FFmpegDecoder} could just spit out video and audio with
+timestamps and let the player sort it out, since the player must
+already handle insertion of black and silence.
+
+The first question would be what time unit the decoder should use to
+stamp its output. Initially we have the PTS, in some time base, and
+we can convert that to seconds at the content's frame rate; this is
+basically a \texttt{Time}. So we could emit video and audio content
+with \texttt{Time} stamps.
+
+Then the player receives video frames, and can fill in gaps.
+
+The FFmpeg decoder would still have to account for non-zero initial
+PTS, as it is expected that such `dead time' is trimmed from the
+source implicitly.
+
+The snag with this is that hitherto \texttt{Time} has meant DCP time,
+not time at a content's rates (before the content is potentially sped
+up). As it stands, seek takes a \texttt{Time} in the DCP and the
+content class converts it to content frames. This is then (rather
+grottily) converted back to time again via the content frame rate.
+All a bit grim. Everything should probably work in time rather than
+frame rates.
+
+\end{document}
film->examine_and_add_content (C);
wait_for_jobs ();
- BOOST_CHECK_EQUAL (A->full_length(), DCPTime (280000));
+ BOOST_CHECK_EQUAL (A->full_length(), DCPTime (288000));
A->set_position (DCPTime::from_seconds (0));
B->set_position (DCPTime::from_seconds (10));
#include <vector>
#include <list>
#include <Magick++.h>
+#include <sndfile.h>
#include <libxml++/libxml++.h>
#include <dcp/dcp.h>
#include "lib/config.h"
return f;
}
+void
+check_audio_file (boost::filesystem::path ref, boost::filesystem::path check)
+{
+ SF_INFO ref_info;
+ ref_info.format = 0;
+ SNDFILE* ref_file = sf_open (ref.string().c_str(), SFM_READ, &ref_info);
+ BOOST_CHECK (ref_file);
+
+ SF_INFO check_info;
+ check_info.format = 0;
+ SNDFILE* check_file = sf_open (check.string().c_str(), SFM_READ, &check_info);
+ BOOST_CHECK (check_file);
+
+ BOOST_CHECK_EQUAL (ref_info.frames, check_info.frames);
+ BOOST_CHECK_EQUAL (ref_info.samplerate, check_info.samplerate);
+ BOOST_CHECK_EQUAL (ref_info.channels, check_info.channels);
+ BOOST_CHECK_EQUAL (ref_info.format, check_info.format);
+
+ /* buffer_size is in frames */
+ sf_count_t const buffer_size = 65536 * ref_info.channels;
+ int32_t* ref_buffer = new int32_t[buffer_size];
+ int32_t* check_buffer = new int32_t[buffer_size];
+
+ sf_count_t N = ref_info.frames;
+ while (N) {
+ sf_count_t this_time = min (buffer_size, N);
+ sf_count_t r = sf_readf_int (ref_file, ref_buffer, this_time);
+ BOOST_CHECK_EQUAL (r, this_time);
+ r = sf_readf_int (check_file, check_buffer, this_time);
+ BOOST_CHECK_EQUAL (r, this_time);
+
+ for (sf_count_t i = 0; i < this_time; ++i) {
+ BOOST_CHECK (fabs (ref_buffer[i] - check_buffer[i]) <= 65536);
+ }
+
+ N -= this_time;
+ }
+}
+
void
check_file (boost::filesystem::path ref, boost::filesystem::path check)
{
uint8_t* ref_buffer = new uint8_t[buffer_size];
uint8_t* check_buffer = new uint8_t[buffer_size];
+ SafeStringStream error;
+ error << "File " << check.string() << " differs from reference " << ref.string();
+
while (N) {
uintmax_t this_time = min (uintmax_t (buffer_size), N);
size_t r = fread (ref_buffer, 1, this_time, ref_file);
r = fread (check_buffer, 1, this_time, check_file);
BOOST_CHECK_EQUAL (r, this_time);
- BOOST_CHECK_EQUAL (memcmp (ref_buffer, check_buffer, this_time), 0);
+ BOOST_CHECK_MESSAGE (memcmp (ref_buffer, check_buffer, this_time) == 0, error.str ());
+ if (memcmp (ref_buffer, check_buffer, this_time)) {
+ break;
+ }
+
N -= this_time;
}
extern boost::shared_ptr<Film> new_test_film (std::string);
extern void check_dcp (boost::filesystem::path, boost::filesystem::path);
extern void check_file (boost::filesystem::path ref, boost::filesystem::path check);
+extern void check_audio_file (boost::filesystem::path ref, boost::filesystem::path check);
extern void check_xml (boost::filesystem::path, boost::filesystem::path, std::list<std::string>);
extern void check_file (boost::filesystem::path, boost::filesystem::path);
extern boost::filesystem::path test_film_dir (std::string);
sf_close (Ls);
sf_close (Rs);
- check_file ("test/data/upmixer_a_test/L.wav", "build/test/upmixer_a_test/L.wav");
- check_file ("test/data/upmixer_a_test/R.wav", "build/test/upmixer_a_test/R.wav");
- check_file ("test/data/upmixer_a_test/C.wav", "build/test/upmixer_a_test/C.wav");
- check_file ("test/data/upmixer_a_test/Lfe.wav", "build/test/upmixer_a_test/Lfe.wav");
- check_file ("test/data/upmixer_a_test/Ls.wav", "build/test/upmixer_a_test/Ls.wav");
- check_file ("test/data/upmixer_a_test/Rs.wav", "build/test/upmixer_a_test/Rs.wav");
+ check_audio_file ("test/data/upmixer_a_test/L.wav", "build/test/upmixer_a_test/L.wav");
+ check_audio_file ("test/data/upmixer_a_test/R.wav", "build/test/upmixer_a_test/R.wav");
+ check_audio_file ("test/data/upmixer_a_test/C.wav", "build/test/upmixer_a_test/C.wav");
+ check_audio_file ("test/data/upmixer_a_test/Lfe.wav", "build/test/upmixer_a_test/Lfe.wav");
+ check_audio_file ("test/data/upmixer_a_test/Ls.wav", "build/test/upmixer_a_test/Ls.wav");
+ check_audio_file ("test/data/upmixer_a_test/Rs.wav", "build/test/upmixer_a_test/Rs.wav");
}
projects / dcpomatic.git / commitdiff
