2 Copyright (C) 2006 Paul Davis
4 This program is free software; you can redistribute it and/or modify it
5 under the terms of the GNU General Public License as published by the Free
6 Software Foundation; either version 2 of the License, or (at your option)
9 This program is distributed in the hope that it will be useful, but WITHOUT
10 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 You should have received a copy of the GNU General Public License along
15 with this program; if not, write to the Free Software Foundation, Inc.,
16 675 Mass Ave, Cambridge, MA 02139, USA.
19 #ifndef __ardour_audio_buffer_h__
20 #define __ardour_audio_buffer_h__
22 #include <ardour/buffer.h>
27 /** Buffer containing 32-bit floating point (audio) data. */
28 class AudioBuffer : public Buffer
31 AudioBuffer(size_t capacity);
35 void silence(nframes_t len, nframes_t offset=0)
38 assert(_capacity > 0);
39 assert(offset + len <= _capacity);
40 memset(_data + offset, 0, sizeof (Sample) * len);
41 if (offset == 0 && len == _capacity) {
47 /** Read @a len frames FROM THE START OF @a src into self at @a offset */
48 void read_from(const Buffer& src, nframes_t len, nframes_t offset)
50 assert(_capacity > 0);
51 assert(src.type() == DataType::AUDIO);
52 assert(offset + len <= _capacity);
53 memcpy(_data + offset, ((AudioBuffer&)src).data(), sizeof(Sample) * len);
54 _silent = src.silent();
57 /** Accumulate (add)@a len frames FROM THE START OF @a src into self at @a offset */
58 void accumulate_from(const AudioBuffer& src, nframes_t len, nframes_t offset)
60 assert(_capacity > 0);
61 assert(offset + len <= _capacity);
63 Sample* const dst_raw = _data + offset;
64 const Sample* const src_raw = src.data();
66 mix_buffers_no_gain(dst_raw, src_raw, len);
68 _silent = (src.silent() && _silent);
71 /** Accumulate (add) @a len frames FROM THE START OF @a src into self at @a offset
72 * scaling by @a gain_coeff */
73 void accumulate_with_gain_from(const AudioBuffer& src, nframes_t len, nframes_t offset, gain_t gain_coeff)
75 assert(_capacity > 0);
76 assert(offset + len <= _capacity);
78 Sample* const dst_raw = _data + offset;
79 const Sample* const src_raw = src.data();
81 mix_buffers_with_gain (dst_raw, src_raw, len, gain_coeff);
83 _silent = ( (src.silent() && _silent) || (_silent && gain_coeff == 0) );
86 void apply_gain(gain_t gain, nframes_t len, nframes_t offset=0) {
87 apply_gain_to_buffer (_data + offset, len, gain);
90 /** Set the data contained by this buffer manually (for setting directly to jack buffer).
92 * Constructor MUST have been passed capacity=0 or this will die (to prevent mem leaks).
94 void set_data(Sample* data, size_t size)
96 assert(!_owns_data); // prevent leaks
103 /** Reallocate the buffer used internally to handle at least @nframes of data
105 * Constructor MUST have been passed capacity!=0 or this will die (to prevent mem leaks).
107 void resize (size_t nframes);
109 const Sample* data () const { return _data; }
110 Sample* data () { return _data; }
112 const Sample* data(nframes_t nframes, nframes_t offset) const
113 { assert(offset + nframes <= _capacity); return _data + offset; }
115 Sample* data (nframes_t nframes, nframes_t offset)
116 { assert(offset + nframes <= _capacity); return _data + offset; }
120 Sample* _data; ///< Actual buffer contents
124 } // namespace ARDOUR
126 #endif // __ardour_audio_audio_buffer_h__