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LibAudio: Alow creating a Buffer from a FixedArray
A FixedArray, due to its non-allocation guarantee, is great for audio programming, so it's natural to have it interface with Buffer.
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1 changed files with 19 additions and 5 deletions
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@ -9,6 +9,7 @@
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#include <AK/ByteBuffer.h>
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#include <AK/Error.h>
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#include <AK/FixedArray.h>
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#include <AK/MemoryStream.h>
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#include <AK/NonnullRefPtr.h>
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#include <AK/RefPtr.h>
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@ -77,6 +78,10 @@ public:
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{
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return adopt_nonnull_ref_or_enomem(new (nothrow) Buffer(move(samples)));
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}
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static ErrorOr<NonnullRefPtr<Buffer>> create_with_samples(FixedArray<Sample>&& samples)
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{
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return adopt_nonnull_ref_or_enomem(new (nothrow) Buffer(move(samples)));
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}
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static ErrorOr<NonnullRefPtr<Buffer>> create_with_anonymous_buffer(Core::AnonymousBuffer buffer, i32 buffer_id, int sample_count)
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{
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return adopt_nonnull_ref_or_enomem(new (nothrow) Buffer(move(buffer), buffer_id, sample_count));
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@ -84,18 +89,27 @@ public:
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static NonnullRefPtr<Buffer> create_empty()
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{
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// If we can't allocate an empty buffer, things are in a very bad state.
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return MUST(adopt_nonnull_ref_or_enomem(new (nothrow) Buffer({})));
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return MUST(adopt_nonnull_ref_or_enomem(new (nothrow) Buffer(FixedArray<Sample> {})));
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}
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const Sample* samples() const { return (const Sample*)data(); }
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Sample const* samples() const { return (const Sample*)data(); }
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int sample_count() const { return m_sample_count; }
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const void* data() const { return m_buffer.data<void>(); }
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void const* data() const { return m_buffer.data<void>(); }
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int size_in_bytes() const { return m_sample_count * (int)sizeof(Sample); }
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int id() const { return m_id; }
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const Core::AnonymousBuffer& anonymous_buffer() const { return m_buffer; }
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Core::AnonymousBuffer const& anonymous_buffer() const { return m_buffer; }
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private:
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explicit Buffer(const Vector<Sample> samples)
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explicit Buffer(Vector<Sample>&& samples)
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// FIXME: AnonymousBuffers can't be empty, so even for empty buffers we create a buffer of size 1 here,
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// although the sample count is set to 0 to mark this.
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: m_buffer(Core::AnonymousBuffer::create_with_size(max(samples.size(), 1) * sizeof(Sample)).release_value())
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, m_id(allocate_id())
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, m_sample_count(samples.size())
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{
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memcpy(m_buffer.data<void>(), samples.data(), samples.size() * sizeof(Sample));
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}
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explicit Buffer(FixedArray<Sample>&& samples)
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// FIXME: AnonymousBuffers can't be empty, so even for empty buffers we create a buffer of size 1 here,
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// although the sample count is set to 0 to mark this.
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: m_buffer(Core::AnonymousBuffer::create_with_size(max(samples.size(), 1) * sizeof(Sample)).release_value())
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