-/** Construct an AudioBuffers. Audio data is undefined after this constructor.
- * @param channels Number of channels.
- * @param frames Number of frames to reserve space for.
- */
-AudioBuffers::AudioBuffers (int channels, int frames)
- : _channels (channels)
- , _frames (frames)
- , _allocated_frames (frames)
-{
- _data = new float*[_channels];
- for (int i = 0; i < _channels; ++i) {
- _data[i] = new float[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 = new float*[_channels];
- for (int i = 0; i < _channels; ++i) {
- _data[i] = new float[_frames];
- memcpy (_data[i], other._data[i], _frames * sizeof (float));
- }
-}
-
-/* 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)
-{
- _data = new float*[_channels];
- for (int i = 0; i < _channels; ++i) {
- _data[i] = new float[_frames];
- memcpy (_data[i], other->_data[i], _frames * sizeof (float));
- }
-}
-
-/** AudioBuffers destructor */
-AudioBuffers::~AudioBuffers ()
-{
- for (int i = 0; i < _channels; ++i) {
- delete[] _data[i];
- }
-
- delete[] _data;
-}
-
-/** @param c Channel index.
- * @return Buffer for this channel.
- */
-float*
-AudioBuffers::data (int c) const
-{
- assert (c >= 0 && c < _channels);
- return _data[c];
-}
-
-/** Set the number of frames that these AudioBuffers will report themselves
- * as having.
- * @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);
- _frames = f;
-}
-
-/** Make all samples on all channels silent */
-void
-AudioBuffers::make_silent ()
-{
- for (int i = 0; i < _channels; ++i) {
- make_silent (i);
- }
-}
-
-/** Make all samples on a given channel silent.
- * @param c Channel.
- */
-void
-AudioBuffers::make_silent (int c)
-{
- assert (c >= 0 && c < _channels);
-
- for (int i = 0; i < _frames; ++i) {
- _data[c][i] = 0;
- }
-}
-
-/** Copy data from another AudioBuffers to this one. All channels are copied.
- * @param from AudioBuffers to copy from; must have the same number of channels as this.
- * @param frames_to_copy Number of frames to copy.
- * @param read_offset Offset to read from in `from'.
- * @param write_offset Offset to write to in `to'.
- */
-void
-AudioBuffers::copy_from (AudioBuffers* from, int frames_to_copy, int read_offset, int write_offset)
-{
- assert (from->channels() == channels());
-
- assert (from);
- assert (read_offset >= 0 && (read_offset + frames_to_copy) <= from->_allocated_frames);
- assert (write_offset >= 0 && (write_offset + frames_to_copy) <= _allocated_frames);
-
- for (int i = 0; i < _channels; ++i) {
- memcpy (_data[i] + write_offset, from->_data[i] + read_offset, frames_to_copy * sizeof(float));
- }
-}
-
-/** Move audio data around.
- * @param from Offset to move from.
- * @param to Offset to move to.
- * @param frames Number of frames to move.
- */
-
-void
-AudioBuffers::move (int from, int to, int frames)
-{
- if (frames == 0) {
- return;
- }
-
- assert (from >= 0);
- assert (from < _frames);
- assert (to >= 0);
- assert (to < _frames);
- assert (frames > 0);
- assert (frames <= _frames);
- assert ((from + frames) <= _frames);
- assert ((to + frames) <= _frames);
-
- for (int i = 0; i < _channels; ++i) {
- memmove (_data[i] + to, _data[i] + from, frames * sizeof(float));
- }
-}
-
-/** Add data from from `from', `from_channel' to our channel `to_channel' */
-void
-AudioBuffers::accumulate (shared_ptr<const AudioBuffers> from, int from_channel, int to_channel)
-{
- int const N = frames ();
- assert (from->frames() == N);
-
- float* s = from->data (from_channel);
- float* d = _data[to_channel];
-
- for (int i = 0; i < N; ++i) {
- *d++ += *s++;
- }
-}
-