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Inrease the export "chunk size" to speed it up over 10% at least in some situations

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git-svn-id: svn://localhost/ardour2/branches/3.0@12919 d708f5d6-7413-0410-9779-e7cbd77b26cf
This commit is contained in:
Sakari Bergen 2012-06-24 19:45:20 +00:00
parent aa76272ae7
commit d54d26e822
2 changed files with 16 additions and 4 deletions
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15
libs/ardour/export_graph_builder.cc
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@ -1,6 +1,7 @@
#include "ardour/export_graph_builder.h"
#include "audiographer/process_context.h"
#include "audiographer/general/chunker.h"
#include "audiographer/general/interleaver.h"
#include "audiographer/general/normalizer.h"
#include "audiographer/general/peak_reader.h"
@ -474,11 +475,18 @@ ExportGraphBuilder::ChannelConfig::ChannelConfig (ExportGraphBuilder & parent, F
typedef ExportChannelConfiguration::ChannelList ChannelList;
config = new_config;
max_frames = parent.session.engine().frames_per_cycle();
framecnt_t max_frames = parent.session.engine().frames_per_cycle();
interleaver.reset (new Interleaver<Sample> ());
interleaver->init (new_config.channel_config->get_n_chans(), max_frames);
// Make the chunk size divisible by the channel count
int chan_count = new_config.channel_config->get_n_chans();
max_frames_out = 8192;
max_frames_out -= max_frames_out % chan_count;
chunker.reset (new Chunker<Sample> (max_frames_out));
interleaver->add_output(chunker);
ChannelList const & channel_list = config.channel_config->get_channels();
unsigned chan = 0;
for (ChannelList::const_iterator it = channel_list.begin(); it != channel_list.end(); ++it, ++chan) {
@ -498,6 +506,8 @@ ExportGraphBuilder::ChannelConfig::ChannelConfig (ExportGraphBuilder & parent, F
void
ExportGraphBuilder::ChannelConfig::add_child (FileSpec const & new_config)
{
assert (*this == new_config);
for (boost::ptr_list<SilenceHandler>::iterator it = children.begin(); it != children.end(); ++it) {
if (*it == new_config) {
it->add_child (new_config);
@ -505,9 +515,8 @@ ExportGraphBuilder::ChannelConfig::add_child (FileSpec const & new_config)
}
}
framecnt_t const max_frames_out = new_config.channel_config->get_n_chans() * max_frames;
children.push_back (new SilenceHandler (parent, new_config, max_frames_out));
interleaver->add_output (children.back().sink ());
chunker->add_output (children.back().sink ());
}
bool