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cubeb_sink: Downsample arbitrary number of channels
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@ -17,8 +17,8 @@ class CubebSinkStream final : public SinkStream {
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public:
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CubebSinkStream(cubeb* ctx, u32 sample_rate, u32 num_channels_, cubeb_devid output_device,
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const std::string& name)
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: ctx{ctx}, is_6_channel{num_channels_ == 6}, num_channels{std::min(num_channels_, 2u)},
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time_stretch{sample_rate, num_channels} {
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: ctx{ctx}, num_channels{std::min(num_channels_, 2u)}, time_stretch{sample_rate,
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num_channels} {
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cubeb_stream_params params{};
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params.rate = sample_rate;
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@ -57,15 +57,15 @@ public:
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cubeb_stream_destroy(stream_backend);
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}
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void EnqueueSamples(u32 num_channels, const std::vector<s16>& samples) override {
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if (is_6_channel) {
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void EnqueueSamples(u32 source_num_channels, const std::vector<s16>& samples) override {
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if (source_num_channels > num_channels) {
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// Downsample 6 channels to 2
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const size_t sample_count_copy_size = samples.size() * 2;
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std::vector<s16> buf;
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buf.reserve(sample_count_copy_size);
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for (size_t i = 0; i < samples.size(); i += num_channels) {
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buf.push_back(samples[i]);
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buf.push_back(samples[i + 1]);
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buf.reserve(samples.size() * num_channels / source_num_channels);
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for (size_t i = 0; i < samples.size(); i += source_num_channels) {
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for (size_t ch = 0; ch < num_channels; ch++) {
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buf.push_back(samples[i + ch]);
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}
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}
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queue.Push(buf);
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return;
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@ -91,7 +91,6 @@ private:
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cubeb* ctx{};
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cubeb_stream* stream_backend{};
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u32 num_channels{};
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bool is_6_channel{};
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Common::RingBuffer<s16, 0x10000> queue;
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std::array<s16, 2> last_frame;
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