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AudioServer: Avoid two heap allocations per mixing iteration.

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This commit is contained in:
Andreas Kling 2019-07-27 17:43:00 +02:00
parent 426248098c
commit b805f112c2
Notes: sideshowbarker 2024-07-19 13:01:36 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/b805f112c21
1 changed files with 3 additions and 2 deletions
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5
Servers/AudioServer/ASMixer.cpp
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@ -61,7 +61,7 @@ void ASMixer::mix()
max_size = min(1023, max_size); max_size = min(1023, max_size);
Vector<ASample> mixed_buffer; Vector<ASample, 1024> mixed_buffer;
mixed_buffer.resize(max_size); mixed_buffer.resize(max_size);
// Mix the buffers together into the output // Mix the buffers together into the output
@ -91,7 +91,8 @@ void ASMixer::mix()
// max_size is 0 indexed, so add 1. // max_size is 0 indexed, so add 1.
const int output_buffer_byte_size = (max_size + 1) * 2 * 2; const int output_buffer_byte_size = (max_size + 1) * 2 * 2;
ASSERT(output_buffer_byte_size == 4096); ASSERT(output_buffer_byte_size == 4096);
ByteBuffer buffer(ByteBuffer::create_uninitialized(output_buffer_byte_size)); u8 raw_buffer[4096];
auto buffer = ByteBuffer::wrap(raw_buffer, sizeof(raw_buffer));
BufferStream stream(buffer); BufferStream stream(buffer);
for (int i = 0; i < mixed_buffer.size(); ++i) { for (int i = 0; i < mixed_buffer.size(); ++i) {