clean up mess in Route/Track controllables caused by not understanding the significan...

[ardour.git] / libs / ardour / ardour / audio_buffer.h

diff --git a/libs/ardour/ardour/audio_buffer.h b/libs/ardour/ardour/audio_buffer.h
index 6b771814db67d20f2bc1f4c40934a70522634e9f..f3ec2ed25a4b157e701966f5cb9ba187f2cf8a9c 100644 (file)
--- a/libs/ardour/ardour/audio_buffer.h
+++ b/libs/ardour/ardour/audio_buffer.h
@@ -27,21 +27,33 @@
 namespace ARDOUR {
 
 /** Buffer containing audio data. */
-class AudioBuffer : public Buffer
+class LIBARDOUR_API AudioBuffer : public Buffer
 {
 public:
        AudioBuffer(size_t capacity);
        ~AudioBuffer();
 
-       void silence (framecnt_t len, framecnt_t offset = 0) {
-               if (!_silent) {
-                       assert(_capacity > 0);
-                       assert(offset + len <= _capacity);
-                       memset(_data + offset, 0, sizeof (Sample) * len);
-                       if (len == _capacity) {
-                               _silent = true;
-                       }
+       void silence (framecnt_t len, framecnt_t offset = 0);
+
+       /** Read @a len frames @a src starting at @a src_offset into self starting at @ dst_offset*/
+       void read_from (const Sample* src, framecnt_t len, framecnt_t dst_offset = 0, framecnt_t src_offset = 0) {
+               assert(src != 0);
+               assert(_capacity > 0);
+               assert(len <= _capacity);
+               memcpy(_data + dst_offset, src + src_offset, sizeof(Sample) * len);
+               _silent = false;
+               _written = true;
+       }
+
+        void read_from_with_gain (const Sample* src, framecnt_t len, gain_t gain, framecnt_t dst_offset = 0, framecnt_t src_offset = 0) {
+               assert(src != 0);
+               assert(_capacity > 0);
+               assert(len <= _capacity);
+               src += src_offset;
+               for (framecnt_t n = 0; n < len; ++n) {
+                       _data[dst_offset+n] = src[n] * gain;
                }
+               _silent = false;
                _written = true;
        }
 
@@ -50,9 +62,9 @@ public:
                assert(&src != this);
                assert(_capacity > 0);
                assert(src.type() == DataType::AUDIO);
-               assert(len <= _capacity);
+               assert(dst_offset + len <= _capacity);
                assert( src_offset <= ((framecnt_t) src.capacity()-len));
-               memcpy(_data + dst_offset, ((AudioBuffer&)src).data() + src_offset, sizeof(Sample) * len);
+               memcpy(_data + dst_offset, ((const AudioBuffer&)src).data() + src_offset, sizeof(Sample) * len);
                if (dst_offset == 0 && src_offset == 0 && len == _capacity) {
                        _silent = src.silent();
                } else {
@@ -82,6 +94,20 @@ public:
                _written = true;
        }
 
+       /** Acumulate (add) @a len frames @a src starting at @a src_offset into self starting at @a dst_offset */
+       void accumulate_from (const Sample* src, framecnt_t len, framecnt_t dst_offset = 0, framecnt_t src_offset = 0) {
+               assert(_capacity > 0);
+               assert(len <= _capacity);
+
+               Sample*       const dst_raw = _data + dst_offset;
+               const Sample* const src_raw = src + src_offset;
+
+               mix_buffers_no_gain(dst_raw, src_raw, len);
+
+               _silent = false;
+               _written = true;
+       }
+
        /** Acumulate (add) @a len frames @a src starting at @a src_offset into self starting at @dst_offset
         * scaling by @a gain_coeff */
        void accumulate_with_gain_from (const AudioBuffer& src, framecnt_t len, gain_t gain_coeff, framecnt_t dst_offset = 0, framecnt_t src_offset = 0) {
@@ -147,7 +173,6 @@ public:
        void set_data (Sample* data, size_t size) {
                assert(!_owns_data); // prevent leaks
                _capacity = size;
-               _size = size;
                _data = data;
                _silent = false;
                _written = false;
@@ -159,8 +184,6 @@ public:
         */
        void resize (size_t nframes);
 
-       bool empty() const { return _size == 0; }
-
        const Sample* data (framecnt_t offset = 0) const {
                assert(offset <= _capacity);
                return _data + offset;
@@ -168,9 +191,12 @@ public:
 
        Sample* data (framecnt_t offset = 0) {
                assert(offset <= _capacity);
+               _silent = false;
                return _data + offset;
        }
 
+       bool check_silence (pframes_t, pframes_t&) const;
+
        void prepare () { _written = false; _silent = false; }
        bool written() const { return _written; }
        void set_written(bool w) { _written = w; }