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62 lines
1.5 KiB
C++
62 lines
1.5 KiB
C++
#include <array>
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#include <cstdint>
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using Sample = uint16_t;
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// gives 8000
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constexpr unsigned int MAX_SAMPLE_BUFFER_BYTESIZE = 16384;
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constexpr unsigned int MAX_SAMPLE_BUFFER_SIZE = MAX_SAMPLE_BUFFER_BYTESIZE / sizeof(Sample);
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class SampleBuffer
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{
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public:
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SampleBuffer(Sample *buffer) :
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m_buffer(buffer) {}
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void clear() {
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std::fill(m_buffer, m_buffer + m_size, 2048);
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}
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void modify(Sample *data, unsigned int srcsize) {
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auto size = srcsize < m_size ? srcsize : m_size;
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std::copy(data, data + size, m_buffer);
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m_modified = m_buffer;
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}
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void midmodify(Sample *data, unsigned int srcsize) {
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auto size = srcsize < m_size / 2 ? srcsize : m_size / 2;
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std::copy(data, data + size, middata());
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m_modified = middata();
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}
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void setSize(unsigned int size) {
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m_size = size < MAX_SAMPLE_BUFFER_SIZE ? size : MAX_SAMPLE_BUFFER_SIZE;
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}
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Sample *data() {
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return m_buffer;
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}
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Sample *middata() {
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return m_buffer + m_size / 2;
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}
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uint8_t *bytedata() {
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return reinterpret_cast<uint8_t *>(m_buffer);
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}
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Sample *modified() {
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auto m = m_modified;
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m_modified = nullptr;
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return m;
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}
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unsigned int size() const {
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return m_size;
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}
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unsigned int bytesize() const {
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return m_size * sizeof(Sample);
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}
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private:
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Sample *m_buffer = nullptr;
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unsigned int m_size = MAX_SAMPLE_BUFFER_SIZE;
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Sample *m_modified = nullptr;
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};
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