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__
23 #include "ardour/buffer.h"
27 class AudioBuffer : public Buffer
30 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 (len == _capacity) {
45 /** Read @a len frames @a src starting at @a src_offset into self starting at @ dst_offset*/
46 void read_from (const Buffer& src, nframes_t len, nframes_t dst_offset = 0, nframes_t src_offset = 0) {
48 assert(_capacity > 0);
49 assert(src.type() == DataType::AUDIO);
50 assert(len <= _capacity);
51 memcpy(_data + dst_offset, ((AudioBuffer&)src).data() + src_offset, sizeof(Sample) * len);
52 if (dst_offset == 0 && src_offset == 0 && len == _capacity) {
53 _silent = src.silent();
55 _silent = _silent && src.silent();
60 /** Acumulate (add) @a len frames @a src starting at @a src_offset into self starting at @ dst_offset*/
61 void accumulate_from (const AudioBuffer& src, nframes_t len, nframes_t dst_offset = 0, nframes_t src_offset = 0) {
62 assert(_capacity > 0);
63 assert(len <= _capacity);
65 Sample* const dst_raw = _data + dst_offset;
66 const Sample* const src_raw = src.data() + src_offset;
68 mix_buffers_no_gain(dst_raw, src_raw, len);
70 _silent = (src.silent() && _silent);
74 /** Acumulate (add) @a len frames @a src starting at @a src_offset into self starting at @ dst_offset
75 * scaling by @a gain_coeff */
76 void accumulate_with_gain_from (const AudioBuffer& src, nframes_t len, gain_t gain_coeff, nframes_t dst_offset = 0, nframes_t src_offset = 0) {
78 assert(_capacity > 0);
79 assert(len <= _capacity);
85 Sample* const dst_raw = _data + dst_offset;
86 const Sample* const src_raw = src.data() + src_offset;
88 mix_buffers_with_gain (dst_raw, src_raw, len, gain_coeff);
90 _silent = ( (src.silent() && _silent) || (_silent && gain_coeff == 0) );
94 /** Accumulate (add) @a len frames FROM THE START OF @a src into self
95 * scaling by @a gain_coeff */
96 void accumulate_with_gain_from (const Sample* src_raw, nframes_t len, gain_t gain_coeff, nframes_t dst_offset = 0) {
98 assert(_capacity > 0);
99 assert(len <= _capacity);
101 Sample* const dst_raw = _data + dst_offset;
103 mix_buffers_with_gain (dst_raw, src_raw, len, gain_coeff);
105 _silent = (_silent && gain_coeff == 0);
109 void apply_gain (gain_t gain, nframes_t len) {
110 apply_gain_to_buffer (_data, len, gain);
113 /** Set the data contained by this buffer manually (for setting directly to jack buffer).
115 * Constructor MUST have been passed capacity=0 or this will die (to prevent mem leaks).
117 void set_data (Sample* data, size_t size) {
118 assert(!_owns_data); // prevent leaks
126 /** Reallocate the buffer used internally to handle at least @nframes of data
128 * Constructor MUST have been passed capacity!=0 or this will die (to prevent mem leaks).
130 void resize (size_t nframes);
133 const Sample* data (nframes_t offset = 0) const {
134 assert(offset <= _capacity);
135 return _data + offset;
138 Sample* data (nframes_t offset = 0) {
139 assert(offset <= _capacity);
140 return _data + offset;
143 void prepare () { _written = false; }
144 bool written() const { return _written; }
149 Sample* _data; ///< Actual buffer contents
154 } // namespace ARDOUR
156 #endif // __ardour_audio_audio_buffer_h__