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@ -23,16 +23,15 @@ class Sink;
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namespace DSP {
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namespace HLE {
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// The application-accessible region of DSP memory consists of two parts.
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// Both are marked as IO and have Read/Write permissions.
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// The application-accessible region of DSP memory consists of two parts. Both are marked as IO and
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// have Read/Write permissions.
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//
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// First Region: 0x1FF50000 (Size: 0x8000)
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// Second Region: 0x1FF70000 (Size: 0x8000)
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//
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// The DSP reads from each region alternately based on the frame counter for each region much like a
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// double-buffer. The frame counter is located as the very last u16 of each region and is
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// incremented
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// each audio tick.
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// incremented each audio tick.
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constexpr VAddr region0_base = 0x1FF50000;
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constexpr VAddr region1_base = 0x1FF70000;
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@ -92,14 +91,12 @@ static_assert(std::is_trivially_copyable<u32_dsp>::value, "u32_dsp isn't trivial
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// See also: DSP::HLE::PipeRead.
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//
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// Note that the above addresses do vary slightly between audio firmwares observed; the addresses
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// are
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// not fixed in stone. The addresses above are only an examplar; they're what this implementation
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// does and provides to applications.
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// are not fixed in stone. The addresses above are only an examplar; they're what this
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// implementation does and provides to applications.
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//
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// Application requests the DSP service to convert DSP addresses into ARM11 virtual addresses using
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// the
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// ConvertProcessAddressFromDspDram service call. Applications seem to derive the addresses for the
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// second region via:
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// the ConvertProcessAddressFromDspDram service call. Applications seem to derive the addresses for
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// the second region via:
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// second_region_dsp_addr = first_region_dsp_addr | 0x10000
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//
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// Applications maintain most of its own audio state, the memory region is used mainly for
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@ -137,8 +134,8 @@ struct SourceConfiguration {
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BitField<0, 1, u32_le> format_dirty;
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BitField<1, 1, u32_le> mono_or_stereo_dirty;
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BitField<2, 1, u32_le> adpcm_coefficients_dirty;
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BitField<3, 1, u32_le>
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partial_embedded_buffer_dirty; ///< Tends to be set when a looped buffer is queued.
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/// Tends to be set when a looped buffer is queued.
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BitField<3, 1, u32_le> partial_embedded_buffer_dirty;
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BitField<4, 1, u32_le> partial_reset_flag;
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BitField<16, 1, u32_le> enable_dirty;
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@ -146,8 +143,8 @@ struct SourceConfiguration {
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BitField<18, 1, u32_le> rate_multiplier_dirty;
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BitField<19, 1, u32_le> buffer_queue_dirty;
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BitField<20, 1, u32_le> loop_related_dirty;
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BitField<21, 1, u32_le>
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play_position_dirty; ///< Tends to also be set when embedded buffer is updated.
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/// Tends to also be set when embedded buffer is updated.
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BitField<21, 1, u32_le> play_position_dirty;
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BitField<22, 1, u32_le> filters_enabled_dirty;
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BitField<23, 1, u32_le> simple_filter_dirty;
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BitField<24, 1, u32_le> biquad_filter_dirty;
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@ -162,9 +159,9 @@ struct SourceConfiguration {
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// Gain control
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/**
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* Gain is between 0.0-1.0. This determines how much will this source appear on
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* each of the 12 channels that feed into the intermediate mixers.
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* Each of the three intermediate mixers is fed two left and two right channels.
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* Gain is between 0.0-1.0. This determines how much will this source appear on each of the
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* 12 channels that feed into the intermediate mixers. Each of the three intermediate mixers
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* is fed two left and two right channels.
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*/
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float_le gain[3][4];
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@ -173,7 +170,11 @@ struct SourceConfiguration {
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/// Multiplier for sample rate. Resampling occurs with the selected interpolation method.
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float_le rate_multiplier;
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enum class InterpolationMode : u8 { Polyphase = 0, Linear = 1, None = 2 };
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enum class InterpolationMode : u8 {
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Polyphase = 0,
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Linear = 1,
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None = 2,
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};
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InterpolationMode interpolation_mode;
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INSERT_PADDING_BYTES(1); ///< Interpolation related
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@ -197,8 +198,7 @@ struct SourceConfiguration {
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* The transfer function of this filter is:
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* H(z) = (b0 + b1 z^-1 + b2 z^-2) / (1 - a1 z^-1 - a2 z^-2)
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* Nintendo chose to negate the feedbackward coefficients. This differs from standard
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* notation
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* as in: https://ccrma.stanford.edu/~jos/filters/Direct_Form_I.html
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* notation as in: https://ccrma.stanford.edu/~jos/filters/Direct_Form_I.html
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* Values are signed fixed point with 14 fractional bits.
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*/
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struct BiquadFilter {
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@ -246,8 +246,8 @@ struct SourceConfiguration {
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u8 is_looping;
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/// This value is shown in SourceStatus::previous_buffer_id when this buffer has
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/// finished.
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/// This allows the emulated application to tell what buffer is currently playing
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/// finished. This allows the emulated application to tell what buffer is currently
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/// playing.
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u16_le buffer_id;
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INSERT_PADDING_DSPWORDS(1);
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@ -275,9 +275,16 @@ struct SourceConfiguration {
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/// Note a sample takes up different number of bytes in different buffer formats.
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u32_dsp length;
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enum class MonoOrStereo : u16_le { Mono = 1, Stereo = 2 };
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enum class MonoOrStereo : u16_le {
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Mono = 1,
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Stereo = 2,
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};
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enum class Format : u16_le { PCM8 = 0, PCM16 = 1, ADPCM = 2 };
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enum class Format : u16_le {
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PCM8 = 0,
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PCM16 = 1,
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ADPCM = 2,
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};
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union {
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u16_le flags1_raw;
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@ -349,12 +356,16 @@ struct DspConfiguration {
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};
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/// The DSP has three intermediate audio mixers. This controls the volume level (0.0-1.0) for
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/// each at the final mixer
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/// each at the final mixer.
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float_le volume[3];
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INSERT_PADDING_DSPWORDS(3);
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enum class OutputFormat : u16_le { Mono = 0, Stereo = 1, Surround = 2 };
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enum class OutputFormat : u16_le {
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Mono = 0,
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Stereo = 1,
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Surround = 2,
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};
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OutputFormat output_format;
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@ -386,9 +397,10 @@ struct DspConfiguration {
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u16_le enable;
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INSERT_PADDING_DSPWORDS(1);
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u16_le outputs;
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u32_dsp work_buffer_address; ///< The application allocates a block of memory for the DSP to
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/// use as a work buffer.
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u16_le frame_count; ///< Frames to delay by
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/// The application allocates a block of memory for the DSP to use as a work buffer.
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u32_dsp work_buffer_address;
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/// Frames to delay by
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u16_le frame_count;
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// Coefficients
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s16_le g; ///< Fixed point with 7 fractional bits
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Yuri Kunde Schlesner