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add a SndFileSource c'tor to create .flac encoded file for archiving

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This commit is contained in:
Robin Gareus 2016-09-21 03:40:48 +02:00
parent 7e09dc1aa6
commit 22e16b7904
2 changed files with 71 additions and 2 deletions
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4
libs/ardour/ardour/sndfilesource.h
View File

@ -24,6 +24,7 @@
#include "ardour/audiofilesource.h"
#include "ardour/broadcast_info.h"
#include "ardour/progress.h"
namespace ARDOUR {
@ -49,6 +50,9 @@ class LIBARDOUR_API SndFileSource : public AudioFileSource {
*/
SndFileSource (Session&, const XMLNode&);
/** Constructor to losslessly compress existing source */
SndFileSource (Session& s, const AudioFileSource& other, const std::string& path, bool use16bits = false, Progress* p = NULL);
~SndFileSource ();
float sample_rate () const;

69
libs/ardour/sndfilesource.cc
View File

@ -232,6 +232,63 @@ SndFileSource::SndFileSource (Session& s, const string& path, int chn)
}
}
/** Constructor to losslessly compress existing source to flac */
SndFileSource::SndFileSource (Session& s, const AudioFileSource& other, const string& path, bool use16bits, Progress* progress)
: Source(s, DataType::AUDIO, path, Flag ((other.flags () | default_writable_flags | NoPeakFile) & ~RF64_RIFF))
, AudioFileSource (s, path, "", Flag ((other.flags () | default_writable_flags | NoPeakFile) & ~RF64_RIFF), /*unused*/ FormatFloat, /*unused*/ WAVE64)
, _sndfile (0)
, _broadcast_info (0)
, _capture_start (false)
, _capture_end (false)
, file_pos (0)
, xfade_buf (0)
{
if (other.readable_length () == 0) {
throw failed_constructor();
}
assert (!Glib::file_test (_path, Glib::FILE_TEST_EXISTS));
_channel = other.channel ();
init_sndfile ();
_file_is_new = true;
_info.channels = other.n_channels();
_info.samplerate = other.sample_rate ();
_info.format = SF_FORMAT_FLAC | (use16bits ? SF_FORMAT_PCM_16 : SF_FORMAT_PCM_24);
/* flac is either read or write -- never both,
* so we need to special-case ::open () */
#ifdef PLATFORM_WINDOWS
int fd = g_open (_path.c_str(), O_CREAT | O_RDWR, 0644);
#else
int fd = ::open (_path.c_str(), O_CREAT | O_RDWR, 0644);
#endif
if (fd == -1) {
throw failed_constructor();
}
_sndfile = sf_open_fd (fd, SFM_WRITE, &_info, true);
if (_sndfile == 0) {
throw failed_constructor();
}
/* copy file */
Sample buf[8192];
framecnt_t off = 0;
framecnt_t len = other.read (buf, off, 8192, /*channel*/0);
while (len > 0) {
write (buf, len);
off += len;
len = other.read (buf, off, 8192, /*channel*/0);
if (progress) {
progress->set_progress ((float) off / other.readable_length ());
}
}
}
void
SndFileSource::init_sndfile ()
{
@ -285,7 +342,12 @@ SndFileSource::open ()
return -1;
}
_sndfile = sf_open_fd (fd, writable() ? SFM_RDWR : SFM_READ, &_info, true);
if (_info.format & SF_FORMAT_FLAC) {
assert (!writable());
_sndfile = sf_open_fd (fd, SFM_READ, &_info, true);
} else {
_sndfile = sf_open_fd (fd, writable() ? SFM_RDWR : SFM_READ, &_info, true);
}
if (_sndfile == 0) {
char errbuf[1024];
@ -714,7 +776,10 @@ SndFileSource::set_header_timeline_position ()
framecnt_t
SndFileSource::write_float (Sample* data, framepos_t frame_pos, framecnt_t cnt)
{
if (_sndfile == 0 || sf_seek (_sndfile, frame_pos, SEEK_SET|SFM_WRITE) < 0) {
if (_info.format & SF_FORMAT_FLAC) {
assert (_length == frame_pos);
}
else if (_sndfile == 0 || sf_seek (_sndfile, frame_pos, SEEK_SET|SFM_WRITE) < 0) {
char errbuf[256];
sf_error_str (0, errbuf, sizeof (errbuf) - 1);
error << string_compose (_("%1: cannot seek to %2 (libsndfile error: %3)"), _path, frame_pos, errbuf) << endmsg;