#include <cstdlib>
#include <cassert>
+#include <cstring>
#include <iostream>
+#include <boost/utility.hpp>
+
#include <ardour/types.h>
#include <ardour/data_type.h>
+#include <ardour/runtime_functions.h>
namespace ARDOUR {
*
* To actually read/write buffer contents, use the appropriate derived class.
*/
-class Buffer
+class Buffer : public boost::noncopyable
{
public:
virtual ~Buffer() {}
* Based on this you can static cast a Buffer* to the desired type. */
DataType type() const { return _type; }
+ bool silent() const { return _silent; }
+
+ /** Reallocate the buffer used internally to handle at least @a size_t units of data.
+ *
+ * The buffer is not silent after this operation. the @a capacity argument
+ * passed to the constructor must have been non-zero.
+ */
+ virtual void resize(size_t) = 0;
+
/** Clear (eg zero, or empty) buffer starting at TIME @a offset */
- virtual void silence(jack_nframes_t len, jack_nframes_t offset=0) = 0;
+ virtual void silence(nframes_t len, nframes_t offset=0) = 0;
/** Clear the entire buffer */
virtual void clear() { silence(_capacity, 0); }
+
+ virtual void read_from(const Buffer& src, nframes_t offset, nframes_t len) = 0;
- virtual void read_from(const Buffer& src, jack_nframes_t offset, jack_nframes_t len) = 0;
-
-protected:
+ protected:
Buffer(DataType type, size_t capacity)
- : _type(type), _capacity(capacity), _size(0)
+ : _type(type), _capacity(capacity), _size(0), _silent(true)
{}
DataType _type;
size_t _capacity;
size_t _size;
-
-private:
- // Prevent copies (undefined)
- Buffer(const Buffer& copy);
- void operator=(const Buffer& other);
-};
-
-
-/* Inside every class with a type in it's name is a template waiting to get out... */
-
-
-/** Buffer containing 32-bit floating point (audio) data. */
-class AudioBuffer : public Buffer
-{
-public:
- AudioBuffer(size_t capacity);
-
- ~AudioBuffer();
-
- void silence(jack_nframes_t len, jack_nframes_t offset=0)
- {
- assert(_capacity > 0);
- assert(offset + len <= _capacity);
- memset(_data + offset, 0, sizeof (Sample) * len);
- }
-
- /** Read @a len frames FROM THE START OF @a src into self at @a offset */
- void read_from(const Buffer& src, jack_nframes_t len, jack_nframes_t offset)
- {
- assert(_capacity > 0);
- assert(src.type() == _type == DataType::AUDIO);
- assert(offset + len <= _capacity);
- memcpy(_data + offset, ((AudioBuffer&)src).data(len), sizeof(Sample) * len);
- }
-
- /** Accumulate (add)@a len frames FROM THE START OF @a src into self at @a offset */
- void accumulate_from(const AudioBuffer& src, jack_nframes_t len, jack_nframes_t offset)
- {
- assert(_capacity > 0);
- assert(offset + len <= _capacity);
-
- Sample* const dst_raw = _data + offset;
- const Sample* const src_raw = src.data(len);
-
- for (jack_nframes_t n = 0; n < len; ++n) {
- dst_raw[n] += src_raw[n];
- }
- }
-
- /** Accumulate (add) @a len frames FROM THE START OF @a src into self at @a offset
- * scaling by @a gain_coeff */
- void accumulate_with_gain_from(const AudioBuffer& src, jack_nframes_t len, jack_nframes_t offset, gain_t gain_coeff)
- {
- assert(_capacity > 0);
- assert(offset + len <= _capacity);
-
- Sample* const dst_raw = _data + offset;
- const Sample* const src_raw = src.data(len);
-
- for (jack_nframes_t n = 0; n < len; ++n) {
- dst_raw[n] += src_raw[n] * gain_coeff;
- }
- }
-
- void apply_gain(gain_t gain, jack_nframes_t len, jack_nframes_t offset=0) {
- Sample* const buf = _data + offset;
-
- for (jack_nframes_t n = 0; n < len; ++n) {
- buf[n] *= gain;
- }
- }
-
- /** Set the data contained by this buffer manually (for setting directly to jack buffer).
- *
- * Constructor MUST have been passed capacity=0 or this will die (to prevent mem leaks).
- */
- void set_data(Sample* data, size_t size)
- {
- assert(!_owns_data); // prevent leaks
- _capacity = size;
- _size = size;
- _data = data;
- }
-
- const Sample* data(jack_nframes_t nframes, jack_nframes_t offset=0) const
- { assert(offset + nframes <= _capacity); return _data + offset; }
-
- Sample* data(jack_nframes_t nframes, jack_nframes_t offset=0)
- { assert(offset + nframes <= _capacity); return _data + offset; }
-
-private:
- // These are undefined (prevent copies)
- AudioBuffer(const AudioBuffer& copy);
- AudioBuffer& operator=(const AudioBuffer& copy);
-
- bool _owns_data;
- Sample* _data; ///< Actual buffer contents
+ bool _silent;
};
-
-/** Buffer containing 8-bit unsigned char (MIDI) data. */
-class MidiBuffer : public Buffer
-{
-public:
- MidiBuffer(size_t capacity);
-
- ~MidiBuffer();
-
- // FIXME: clear events starting at offset in time
- void silence(jack_nframes_t len, jack_nframes_t offset=0) { assert(offset == 0); _size = 0; }
-
- void read_from(const Buffer& src, jack_nframes_t nframes, jack_nframes_t offset);
-
- void set_size(size_t size) { _size = size; }
-
- const RawMidi* data() const { return _data; }
- RawMidi* data() { return _data; }
-
-private:
- // These are undefined (prevent copies)
- MidiBuffer(const MidiBuffer& copy);
- MidiBuffer& operator=(const MidiBuffer& copy);
-
- bool _owns_data;
- RawMidi* _data; ///< Actual buffer contents
-};
-
} // namespace ARDOUR
#endif // __ardour_buffer_h__