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Fix

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This commit is contained in:
fearlessTobi 2019-03-01 23:08:39 +01:00 • committed by James Rowe
parent 7fccc995ce
commit 5c9e327ff3
1 changed files with 27 additions and 22 deletions
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49
src/audio_core/cubeb_input.cpp
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@ -23,6 +23,8 @@ struct CubebInput::Impl {
u32 offset;
u32 audio_buffer_size;
void UpdateOffset(int new_offset, Impl* impl);
void ProcessSample(const u8* data, int current_sample_index, Impl* impl);
static long DataCallback(cubeb_stream* stream, void* user_data, const void* input_buffer,
void* output_buffer, long num_frames);
static void StateCallback(cubeb_stream* stream, void* user_data, cubeb_state state);
@ -97,6 +99,25 @@ void CubebInput::AdjustSampleRate(u32 sample_rate) {
LOG_ERROR(Audio, "AdjustSampleRate unimplemented!");
}
void CubebInput::Impl::UpdateOffset(int new_offset, Impl* impl) {
impl->offset = new_offset;
std::memcpy(impl->buffer + impl->audio_buffer_size, reinterpret_cast<u8*>(&impl->offset),
sizeof(u32));
}
void CubebInput::Impl::ProcessSample(const u8* data, int current_sample_index, Impl* impl) {
if (impl->offset >= impl->audio_buffer_size) {
if (impl->looped_buffer)
UpdateOffset(impl->initial_offset, impl);
else
return;
}
std::memcpy(impl->buffer + impl->offset, data + current_sample_index * sizeof(u16),
sizeof(u16));
UpdateOffset(impl->offset + sizeof(u16), impl);
}
long CubebInput::Impl::DataCallback(cubeb_stream* stream, void* user_data, const void* input_buffer,
void* output_buffer, long num_frames) {
Impl* impl = static_cast<Impl*>(user_data);
@ -110,31 +131,15 @@ long CubebInput::Impl::DataCallback(cubeb_stream* stream, void* user_data, const
return 0;
}
u64 total_written = 0;
u64 to_write = num_frames;
u64 remaining_space = impl->audio_buffer_size - impl->offset;
if (to_write > remaining_space) {
to_write = remaining_space;
for (int i = 0; i < num_frames; i++) {
impl->ProcessSample(data, i, impl);
}
std::memcpy(impl->buffer + impl->offset, data, to_write);
impl->offset += to_write;
total_written += to_write;
if (impl->looped_buffer && num_frames > total_written) {
impl->offset = impl->initial_offset;
to_write = num_frames - to_write;
std::memcpy(impl->buffer + impl->offset, data, to_write);
impl->offset += to_write;
total_written += to_write;
}
// The last 4 bytes of the shared memory contains the latest offset
// so update that as well https://www.3dbrew.org/wiki/MIC_Shared_Memory
std::memcpy(impl->buffer + (impl->buffer_size - sizeof(u32)),
reinterpret_cast<u8*>(&impl->offset), sizeof(u32));
// returning less than num_frames here signals cubeb to stop sampling
return total_written;
}
// return total_written;
// TODO:: Correct this
return num_frames;
} // namespace AudioCore
void CubebInput::Impl::StateCallback(cubeb_stream* stream, void* user_data, cubeb_state state) {}