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/*
Copyright (C) 2006 Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <pbd/error.h>
#include <ardour/coreaudiosource.h>
#include "i18n.h"
#include <AudioToolbox/AudioFormat.h>
using namespace ARDOUR;
using namespace PBD;
CoreAudioSource::CoreAudioSource (const XMLNode& node)
: AudioFileSource (node)
{
init (_name);
AudioSourceCreated (this); /* EMIT SIGNAL */
}
CoreAudioSource::CoreAudioSource (const string& idstr, Flag flags)
: AudioFileSource(idstr, flags)
{
init (idstr);
AudioSourceCreated (this); /* EMIT SIGNAL */
}
void
CoreAudioSource::init (const string& idstr)
{
string::size_type pos;
string file;
tmpbuf = 0;
tmpbufsize = 0;
af = 0;
OSStatus err = noErr;
_name = idstr;
if ((pos = idstr.find_last_of (':')) == string::npos) {
channel = 0;
file = idstr;
} else {
channel = atoi (idstr.substr (pos+1).c_str());
file = idstr.substr (0, pos);
}
/* note that we temporarily truncated _id at the colon */
FSRef fsr;
err = FSPathMakeRef ((UInt8*)file.c_str(), &fsr, 0);
if (err != noErr) {
error << string_compose (_("Could not make reference to file: %1"), name()) << endmsg;
throw failed_constructor();
}
err = ExtAudioFileOpen (&fsr, &af);
if (err != noErr) {
error << string_compose (_("Could not open file: %1"), name()) << endmsg;
ExtAudioFileDispose (af);
throw failed_constructor();
}
AudioStreamBasicDescription file_asbd;
memset(&file_asbd, 0, sizeof(AudioStreamBasicDescription));
size_t asbd_size = sizeof(AudioStreamBasicDescription);
err = ExtAudioFileGetProperty(af,
kExtAudioFileProperty_FileDataFormat, &asbd_size, &file_asbd);
if (err != noErr) {
error << string_compose (_("Could not get file data format for file: %1"), name()) << endmsg;
ExtAudioFileDispose (af);
throw failed_constructor();
}
n_channels = file_asbd.mChannelsPerFrame;
cerr << "number of channels: " << n_channels << endl;
if (channel >= n_channels) {
error << string_compose(_("CoreAudioSource: file only contains %1 channels; %2 is invalid as a channel number"), n_channels, channel) << endmsg;
ExtAudioFileDispose (af);
throw failed_constructor();
}
int64_t ca_frames;
size_t prop_size = sizeof(int64_t);
err = ExtAudioFileGetProperty(af, kExtAudioFileProperty_FileLengthFrames, &prop_size, &ca_frames);
if (err != noErr) {
error << string_compose (_("Could not get file length for file: %1"), name()) << endmsg;
ExtAudioFileDispose (af);
throw failed_constructor();
}
_length = ca_frames;
_path = file;
AudioStreamBasicDescription client_asbd;
memset(&client_asbd, 0, sizeof(AudioStreamBasicDescription));
client_asbd.mSampleRate = file_asbd.mSampleRate;
client_asbd.mFormatID = kAudioFormatLinearPCM;
client_asbd.mFormatFlags = kLinearPCMFormatFlagIsFloat;
client_asbd.mBytesPerPacket = file_asbd.mChannelsPerFrame * 4;
client_asbd.mFramesPerPacket = 1;
client_asbd.mBytesPerFrame = client_asbd.mBytesPerPacket;
client_asbd.mChannelsPerFrame = file_asbd.mChannelsPerFrame;
client_asbd.mBitsPerChannel = 32;
err = ExtAudioFileSetProperty (af, kExtAudioFileProperty_ClientDataFormat, asbd_size, &client_asbd);
if (err != noErr) {
error << string_compose (_("Could not set client data format for file: %1"), name()) << endmsg;
ExtAudioFileDispose (af);
throw failed_constructor ();
}
if (_build_peakfiles) {
if (initialize_peakfile (false, file)) {
error << string_compose(_("initialize peakfile failed for file %1"), name()) << endmsg;
ExtAudioFileDispose (af);
throw failed_constructor ();
}
}
}
CoreAudioSource::~CoreAudioSource ()
{
GoingAway (this); /* EMIT SIGNAL */
if (af) {
ExtAudioFileDispose (af);
}
if (tmpbuf) {
delete [] tmpbuf;
}
}
jack_nframes_t
CoreAudioSource::read_unlocked (Sample *dst, jack_nframes_t start, jack_nframes_t cnt) const
{
OSStatus err = noErr;
err = ExtAudioFileSeek(af, start);
if (err != noErr) {
error << string_compose(_("CoreAudioSource: could not seek to frame %1 within %2 (%3)"), start, _name.substr (1), err) << endmsg;
return 0;
}
AudioBufferList abl;
abl.mNumberBuffers = 1;
abl.mBuffers[0].mNumberChannels = n_channels;
abl.mBuffers[0].mDataByteSize = cnt * sizeof(Sample);
abl.mBuffers[0].mData = dst;
if (n_channels == 1) {
err = ExtAudioFileRead(af, (UInt32*) &cnt, &abl);
_read_data_count = cnt * sizeof(float);
return cnt;
}
uint32_t real_cnt = cnt * n_channels;
{
Glib::Mutex::Lock lm (_tmpbuf_lock);
if (tmpbufsize < real_cnt) {
if (tmpbuf) {
delete [] tmpbuf;
}
tmpbufsize = real_cnt;
tmpbuf = new float[tmpbufsize];
}
abl.mBuffers[0].mDataByteSize = real_cnt * sizeof(Sample);
abl.mBuffers[0].mData = tmpbuf;
err = ExtAudioFileRead(af, (UInt32*) &real_cnt, &abl);
float *ptr = tmpbuf + channel;
real_cnt /= n_channels;
/* stride through the interleaved data */
for (uint32_t n = 0; n < real_cnt; ++n) {
dst[n] = *ptr;
ptr += n_channels;
}
}
_read_data_count = cnt * sizeof(float);
return real_cnt;
}
float
CoreAudioSource::sample_rate() const
{
AudioStreamBasicDescription client_asbd;
memset(&client_asbd, 0, sizeof(AudioStreamBasicDescription));
OSStatus err = noErr;
size_t asbd_size = sizeof(AudioStreamBasicDescription);
err = ExtAudioFileSetProperty (af, kExtAudioFileProperty_ClientDataFormat, asbd_size, &client_asbd);
if (err != noErr) {
error << string_compose(_("Could not detect samplerate for: %1"), name()) << endmsg;
return 0.0;
}
return client_asbd.mSampleRate;
}
int
CoreAudioSource::update_header (jack_nframes_t when, struct tm&, time_t)
{
return 0;
}
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