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>
26 class AudioBuffer : public Buffer
29 AudioBuffer(size_t capacity);
33 void silence(nframes_t len, nframes_t offset = 0) {
35 assert(_capacity > 0);
36 assert(offset + len <= _capacity);
37 memset(_data + offset, 0, sizeof (Sample) * len);
38 if (offset == 0 && len == _capacity) {
44 /** Read @a len frames FROM THE START OF @a src into self at @a offset */
45 void read_from(const Buffer& src, nframes_t len, nframes_t offset) {
46 assert(_capacity > 0);
47 assert(src.type() == DataType::AUDIO);
48 assert(offset + len <= _capacity);
49 memcpy(_data + offset, ((AudioBuffer&)src).data(), sizeof(Sample) * len);
50 _silent = src.silent();
53 /** Accumulate (add)@a len frames FROM THE START OF @a src into self at @a offset */
54 void accumulate_from(const AudioBuffer& src, nframes_t len, nframes_t offset) {
55 assert(_capacity > 0);
56 assert(offset + len <= _capacity);
58 Sample* const dst_raw = _data + offset;
59 const Sample* const src_raw = src.data();
61 mix_buffers_no_gain(dst_raw, src_raw, len);
63 _silent = (src.silent() && _silent);
66 /** Accumulate (add) @a len frames FROM THE START OF @a src into self at @a offset
67 * scaling by @a gain_coeff */
68 void accumulate_with_gain_from(const AudioBuffer& src, nframes_t len, nframes_t offset, gain_t gain_coeff) {
69 assert(_capacity > 0);
70 assert(offset + len <= _capacity);
72 Sample* const dst_raw = _data + offset;
73 const Sample* const src_raw = src.data();
75 mix_buffers_with_gain (dst_raw, src_raw, len, gain_coeff);
77 _silent = ( (src.silent() && _silent) || (_silent && gain_coeff == 0) );
80 void apply_gain(gain_t gain, nframes_t len, nframes_t offset=0) {
81 apply_gain_to_buffer (_data + offset, len, gain);
84 /** Set the data contained by this buffer manually (for setting directly to jack buffer).
86 * Constructor MUST have been passed capacity=0 or this will die (to prevent mem leaks).
88 void set_data (Sample* data, size_t size) {
89 assert(!_owns_data); // prevent leaks
96 /** Reallocate the buffer used internally to handle at least @nframes of data
98 * Constructor MUST have been passed capacity!=0 or this will die (to prevent mem leaks).
100 void resize (size_t nframes);
102 const Sample* data () const { return _data; }
103 Sample* data () { return _data; }
105 const Sample* data(nframes_t nframes, nframes_t offset) const
106 { assert(offset + nframes <= _capacity); return _data + offset; }
108 Sample* data (nframes_t nframes, nframes_t offset)
109 { assert(offset + nframes <= _capacity); return _data + offset; }
113 Sample* _data; ///< Actual buffer contents
117 } // namespace ARDOUR
119 #endif // __ardour_audio_audio_buffer_h__