#include <iomanip>
#include <iostream>
#include <fstream>
+#include <climits>
#ifdef DVDOMATIC_POSIX
#include <execinfo.h>
#include <cxxabi.h>
#include "dcp_content_type.h"
#include "filter.h"
#include "sound_processor.h"
+#include "config.h"
using namespace std;
using namespace boost;
+using libdcp::Size;
thread::id ui_thread;
* @return FFmpeg crop filter string.
*/
string
-crop_string (Position start, Size size)
+crop_string (Position start, libdcp::Size size)
{
stringstream s;
s << "crop=" << size.width << ":" << size.height << ":" << start.x << ":" << start.y;
return s.str ();
}
-/** @param fps Arbitrary frames-per-second value.
- * @return DCPFrameRate for this frames-per-second.
- */
-DCPFrameRate
-dcp_frame_rate (float fps)
+static bool about_equal (float a, float b)
+{
+ /* A film of F seconds at f FPS will be Ff frames;
+ Consider some delta FPS d, so if we run the same
+ film at (f + d) FPS it will last F(f + d) seconds.
+
+ Hence the difference in length over the length of the film will
+ be F(f + d) - Ff frames
+ = Ff + Fd - Ff frames
+ = Fd frames
+ = Fd/f seconds
+
+ So if we accept a difference of 1 frame, ie 1/f seconds, we can
+ say that
+
+ 1/f = Fd/f
+ ie 1 = Fd
+ ie d = 1/F
+
+ So for a 3hr film, ie F = 3 * 60 * 60 = 10800, the acceptable
+ FPS error is 1/F ~= 0.0001 ~= 10-e4
+ */
+
+ return (fabs (a - b) < 1e-4);
+}
+
+class FrameRateCandidate
+{
+public:
+ FrameRateCandidate (float source_, int dcp_)
+ : source (source_)
+ , dcp (dcp_)
+ {}
+
+ bool skip () const {
+ return !about_equal (source, dcp) && source > dcp;
+ }
+
+ bool repeat () const {
+ return !about_equal (source, dcp) && source < dcp;
+ }
+
+ float source;
+ int dcp;
+};
+
+/** @param fps Arbitrary source frames-per-second value */
+/** XXX: this could be slow-ish */
+DCPFrameRate::DCPFrameRate (float source_fps)
{
- DCPFrameRate dfr;
+ list<int> const allowed_dcp_frame_rates = Config::instance()->allowed_dcp_frame_rates ();
+
+ /* Work out what rates we could manage, including those achieved by using skip / repeat. */
+ list<FrameRateCandidate> candidates;
+
+ /* Start with the ones without skip / repeat so they will get matched in preference to skipped/repeated ones */
+ for (list<int>::const_iterator i = allowed_dcp_frame_rates.begin(); i != allowed_dcp_frame_rates.end(); ++i) {
+ candidates.push_back (FrameRateCandidate (*i, *i));
+ }
+
+ /* Then the skip/repeat ones */
+ for (list<int>::const_iterator i = allowed_dcp_frame_rates.begin(); i != allowed_dcp_frame_rates.end(); ++i) {
+ candidates.push_back (FrameRateCandidate (float (*i) / 2, *i));
+ candidates.push_back (FrameRateCandidate (float (*i) * 2, *i));
+ }
+
+ /* Pick the best one, bailing early if we hit an exact match */
+ float error = numeric_limits<float>::max ();
+ boost::optional<FrameRateCandidate> best;
+ list<FrameRateCandidate>::iterator i = candidates.begin();
+ while (i != candidates.end()) {
+
+ if (about_equal (i->source, source_fps)) {
+ best = *i;
+ break;
+ }
- dfr.run_fast = (fps != rint (fps));
- dfr.frames_per_second = rint (fps);
- dfr.skip = 1;
+ float const e = fabs (i->source - source_fps);
+ if (e < error) {
+ error = e;
+ best = *i;
+ }
+
+ ++i;
+ }
- /* XXX: somewhat arbitrary */
- if (fps == 50) {
- dfr.frames_per_second = 25;
- dfr.skip = 2;
+ if (!best) {
+ throw EncodeError ("cannot find a suitable DCP frame rate for this source");
}
- return dfr;
+ frames_per_second = best->dcp;
+ skip = best->skip ();
+ repeat = best->repeat ();
+ change_speed = !about_equal (source_fps * factor(), frames_per_second);
}
/** @param An arbitrary sampling rate.
return 96000;
}
-bool operator== (Size const & a, Size const & b)
+int
+dcp_audio_channels (int f)
{
- return (a.width == b.width && a.height == b.height);
-}
+ if (f == 1) {
+ /* The source is mono, so to put the mono channel into
+ the centre we need to generate a 5.1 soundtrack.
+ */
+ return 6;
+ }
-bool operator!= (Size const & a, Size const & b)
-{
- return !(a == b);
+ return f;
}
bool operator== (Crop const & a, Crop const & b)
void
Socket::connect (asio::ip::basic_resolver_entry<asio::ip::tcp> const & endpoint, int timeout)
{
+ _deadline.expires_from_now (posix_time::seconds (timeout));
system::error_code ec = asio::error::would_block;
_socket.async_connect (endpoint, lambda::var(ec) = lambda::_1);
do {
return (ext == ".tif" || ext == ".tiff" || ext == ".jpg" || ext == ".jpeg" || ext == ".png");
}
+
+/** @return A pair containing CPU model name and the number of processors */
+pair<string, int>
+cpu_info ()
+{
+ pair<string, int> info;
+ info.second = 0;
+
+#ifdef DVDOMATIC_POSIX
+ ifstream f ("/proc/cpuinfo");
+ while (f.good ()) {
+ string l;
+ getline (f, l);
+ if (boost::algorithm::starts_with (l, "model name")) {
+ string::size_type const c = l.find (':');
+ if (c != string::npos) {
+ info.first = l.substr (c + 2);
+ }
+ } else if (boost::algorithm::starts_with (l, "processor")) {
+ ++info.second;
+ }
+ }
+#endif
+
+ return info;
+}