* @param frames Number of frames to reserve space for.
*/
AudioBuffers::AudioBuffers (int channels, int frames)
- : _channels (channels)
- , _frames (frames)
- , _allocated_frames (frames)
{
- _data = static_cast<float**> (malloc (_channels * sizeof (float *)));
- if (!_data) {
- throw bad_alloc ();
- }
-
- for (int i = 0; i < _channels; ++i) {
- _data[i] = static_cast<float*> (malloc (frames * sizeof (float)));
- if (!_data[i]) {
- throw bad_alloc ();
- }
- }
+ allocate (channels, frames);
}
/** Copy constructor.
* @param other Other AudioBuffers; data is copied.
*/
AudioBuffers::AudioBuffers (AudioBuffers const & other)
- : _channels (other._channels)
- , _frames (other._frames)
- , _allocated_frames (other._frames)
{
- _data = static_cast<float**> (malloc (_channels * sizeof (float *)));
- if (!_data) {
- throw bad_alloc ();
- }
-
- for (int i = 0; i < _channels; ++i) {
- _data[i] = static_cast<float*> (malloc (_frames * sizeof (float)));
- if (!_data[i]) {
- throw bad_alloc ();
- }
- memcpy (_data[i], other._data[i], _frames * sizeof (float));
- }
+ allocate (other._channels, other._frames);
+ copy_from (&other, other._frames, 0, 0);
}
-/* XXX: it's a shame that this is a copy-and-paste of the above;
- probably fixable with c++0x.
-*/
AudioBuffers::AudioBuffers (boost::shared_ptr<const AudioBuffers> other)
- : _channels (other->_channels)
- , _frames (other->_frames)
- , _allocated_frames (other->_frames)
{
+ allocate (other->_channels, other->_frames);
+ copy_from (other.get(), other->_frames, 0, 0);
+}
+
+AudioBuffers &
+AudioBuffers::operator= (AudioBuffers const & other)
+{
+ if (this == &other) {
+ return *this;
+ }
+
+ deallocate ();
+ allocate (other._channels, other._frames);
+ copy_from (&other, other._frames, 0, 0);
+
+ return *this;
+}
+
+/** AudioBuffers destructor */
+AudioBuffers::~AudioBuffers ()
+{
+ deallocate ();
+}
+
+void
+AudioBuffers::allocate (int channels, int frames)
+{
+ _channels = channels;
+ _frames = frames;
+ _allocated_frames = frames;
+
_data = static_cast<float**> (malloc (_channels * sizeof (float *)));
if (!_data) {
throw bad_alloc ();
}
for (int i = 0; i < _channels; ++i) {
- _data[i] = static_cast<float*> (malloc (_frames * sizeof (float)));
+ _data[i] = static_cast<float*> (malloc (frames * sizeof (float)));
if (!_data[i]) {
throw bad_alloc ();
}
- memcpy (_data[i], other->_data[i], _frames * sizeof (float));
}
}
-/** AudioBuffers destructor */
-AudioBuffers::~AudioBuffers ()
+void
+AudioBuffers::deallocate ()
{
for (int i = 0; i < _channels; ++i) {
free (_data[i]);
}
/** Set the number of frames that these AudioBuffers will report themselves
- * as having.
+ * as having. If we reduce the number of frames, the `lost' frames will
+ * be silenced.
* @param f Frames; must be less than or equal to the number of allocated frames.
*/
void
AudioBuffers::set_frames (int f)
{
assert (f <= _allocated_frames);
+
+ for (int c = 0; c < _channels; ++c) {
+ for (int i = f; i < _frames; ++i) {
+ _data[c][i] = 0;
+ }
+ }
+
_frames = f;
}
assert (frames > 0);
assert (frames <= _frames);
assert ((from + frames) <= _frames);
- assert ((to + frames) <= _frames);
+ assert ((to + frames) <= _allocated_frames);
for (int i = 0; i < _channels; ++i) {
memmove (_data[i] + to, _data[i] + from, frames * sizeof(float));