/* Create sound output files with .tmp suffixes; we will rename
them if and when we complete.
*/
- for (int i = 0; i < _film->audio_channels(); ++i) {
+ for (int i = 0; i < dcp_audio_channels (_film->audio_channels()); ++i) {
SF_INFO sf_info;
sf_info.samplerate = dcp_audio_sample_rate (_film->audio_stream()->sample_rate());
/* We write mono files */
close_sound_files ();
/* Rename .wav.tmp files to .wav */
- for (int i = 0; i < _film->audio_channels(); ++i) {
+ for (int i = 0; i < dcp_audio_channels (_film->audio_channels()); ++i) {
if (boost::filesystem::exists (_opt->multichannel_audio_out_path (i, false))) {
boost::filesystem::remove (_opt->multichannel_audio_out_path (i, false));
}
}
#endif
+ if (_film->audio_channels() == 1) {
+ /* We need to switch things around so that the mono channel is on
+ the centre channel of a 5.1 set (with other channels silent).
+ */
+
+ shared_ptr<AudioBuffers> b (new AudioBuffers (6, data->frames ()));
+ b->make_silent (libdcp::LEFT);
+ b->make_silent (libdcp::RIGHT);
+ memcpy (b->data()[libdcp::CENTRE], data->data()[0], data->frames() * sizeof(float));
+ b->make_silent (libdcp::LFE);
+ b->make_silent (libdcp::LS);
+ b->make_silent (libdcp::RS);
+ }
+
write_audio (data);
_audio_frame += data->frames ();
void
Encoder::write_audio (shared_ptr<const AudioBuffers> audio)
{
- for (int i = 0; i < _film->audio_channels(); ++i) {
+ for (int i = 0; i < audio->channels(); ++i) {
sf_write_float (_sound_files[i], audio->data(i), audio->frames());
}
return 96000;
}
+int
+dcp_audio_channels (int f)
+{
+ if (f) {
+ /* The source is mono, so to put the mono channel into
+ the centre we need to generate a 5.1 soundtrack.
+ */
+ return 6;
+ }
+
+ return f;
+}
+
+
bool operator== (Size const & a, Size const & b)
{
return (a.width == b.width && a.height == b.height);
extern std::string crop_string (Position, Size);
extern int dcp_audio_sample_rate (int);
extern DCPFrameRate dcp_frame_rate (float);
+extern int dcp_audio_channels (int);
extern std::string colour_lut_index_to_name (int index);
extern int stride_round_up (int, int const *, int);
extern int stride_lookup (int c, int const * stride);