cubeb_sink: Support variable sample_rate and num_channels.
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34b3f83498
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@ -13,14 +13,24 @@ namespace AudioCore {
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class SinkStreamImpl final : public SinkStream {
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class SinkStreamImpl final : public SinkStream {
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public:
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public:
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SinkStreamImpl(cubeb* ctx, cubeb_devid output_device, const std::string& name) : ctx{ctx} {
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SinkStreamImpl(cubeb* ctx, u32 sample_rate, u32 num_channels_, cubeb_devid output_device,
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cubeb_stream_params params;
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const std::string& name)
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params.rate = 48000;
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: ctx{ctx}, num_channels{num_channels_} {
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params.channels = GetNumChannels();
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params.format = CUBEB_SAMPLE_S16NE;
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params.layout = CUBEB_LAYOUT_STEREO;
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u32 minimum_latency = 0;
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if (num_channels == 6) {
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// 6-channel audio does not seem to work with cubeb + SDL, so we downsample this to 2
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// channel for now
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is_6_channel = true;
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num_channels = 2;
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}
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cubeb_stream_params params{};
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params.rate = sample_rate;
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params.channels = num_channels;
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params.format = CUBEB_SAMPLE_S16NE;
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params.layout = num_channels == 1 ? CUBEB_LAYOUT_MONO : CUBEB_LAYOUT_STEREO;
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u32 minimum_latency{};
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if (cubeb_get_min_latency(ctx, ¶ms, &minimum_latency) != CUBEB_OK) {
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if (cubeb_get_min_latency(ctx, ¶ms, &minimum_latency) != CUBEB_OK) {
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LOG_CRITICAL(Audio_Sink, "Error getting minimum latency");
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LOG_CRITICAL(Audio_Sink, "Error getting minimum latency");
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}
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}
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@ -58,11 +68,7 @@ public:
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queue.reserve(queue.size() + sample_count * GetNumChannels());
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queue.reserve(queue.size() + sample_count * GetNumChannels());
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if (num_channels == 2) {
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if (is_6_channel) {
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// Copy as-is
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std::copy(samples, samples + sample_count * GetNumChannels(),
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std::back_inserter(queue));
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} else if (num_channels == 6) {
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// Downsample 6 channels to 2
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// Downsample 6 channels to 2
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const size_t sample_count_copy_size = sample_count * num_channels * 2;
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const size_t sample_count_copy_size = sample_count * num_channels * 2;
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queue.reserve(sample_count_copy_size);
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queue.reserve(sample_count_copy_size);
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@ -71,13 +77,14 @@ public:
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queue.push_back(samples[i + 1]);
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queue.push_back(samples[i + 1]);
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}
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}
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} else {
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} else {
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ASSERT_MSG(false, "Unimplemented");
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// Copy as-is
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std::copy(samples, samples + sample_count * GetNumChannels(),
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std::back_inserter(queue));
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}
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}
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}
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}
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u32 GetNumChannels() const {
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u32 GetNumChannels() const {
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// Only support 2-channel stereo output for now
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return num_channels;
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return 2;
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}
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}
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private:
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private:
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@ -85,6 +92,8 @@ private:
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cubeb* ctx{};
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cubeb* ctx{};
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cubeb_stream* stream_backend{};
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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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std::vector<s16> queue;
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std::vector<s16> queue;
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@ -131,7 +140,8 @@ CubebSink::~CubebSink() {
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SinkStream& CubebSink::AcquireSinkStream(u32 sample_rate, u32 num_channels,
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SinkStream& CubebSink::AcquireSinkStream(u32 sample_rate, u32 num_channels,
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const std::string& name) {
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const std::string& name) {
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sink_streams.push_back(std::make_unique<SinkStreamImpl>(ctx, output_device, name));
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sink_streams.push_back(
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std::make_unique<SinkStreamImpl>(ctx, sample_rate, num_channels, output_device, name));
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return *sink_streams.back();
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return *sink_streams.back();
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}
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}
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