370 lines
13 KiB
C++
370 lines
13 KiB
C++
/**
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******************************************************************************
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* Xenia : Xbox 360 Emulator Research Project *
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******************************************************************************
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* Copyright 2015 Ben Vanik. All rights reserved. *
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* Released under the BSD license - see LICENSE in the root for more details. *
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******************************************************************************
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*/
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#include <cstring>
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#include "xenia/apu/audio_system.h"
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#include "xenia/apu/xma_decoder.h"
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#include "xenia/base/logging.h"
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#include "xenia/emulator.h"
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#include "xenia/kernel/kernel_state.h"
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#include "xenia/kernel/util/shim_utils.h"
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#include "xenia/kernel/xboxkrnl_private.h"
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#include "xenia/xbox.h"
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using namespace xe::apu;
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namespace xe {
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namespace kernel {
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// See audio_system.cc for implementation details.
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//
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// XMA details:
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// https://devel.nuclex.org/external/svn/directx/trunk/include/xma2defs.h
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// https://github.com/gdawg/fsbext/blob/master/src/xma_header.h
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//
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// XMA is undocumented, but the methods are pretty simple.
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// Games do this sequence to decode (now):
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// (not sure we are setting buffer validity/offsets right)
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// d> XMACreateContext(20656800)
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// d> XMAIsInputBuffer0Valid(000103E0)
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// d> XMAIsInputBuffer1Valid(000103E0)
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// d> XMADisableContext(000103E0, 0)
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// d> XMABlockWhileInUse(000103E0)
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// d> XMAInitializeContext(000103E0, 20008810)
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// d> XMASetOutputBufferValid(000103E0)
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// d> XMASetInputBuffer0Valid(000103E0)
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// d> XMAEnableContext(000103E0)
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// d> XMAGetOutputBufferWriteOffset(000103E0)
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// d> XMAGetOutputBufferReadOffset(000103E0)
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// d> XMAIsOutputBufferValid(000103E0)
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// d> XMAGetOutputBufferReadOffset(000103E0)
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// d> XMAGetOutputBufferWriteOffset(000103E0)
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// d> XMAIsInputBuffer0Valid(000103E0)
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// d> XMAIsInputBuffer1Valid(000103E0)
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// d> XMAIsInputBuffer0Valid(000103E0)
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// d> XMAIsInputBuffer1Valid(000103E0)
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// d> XMAReleaseContext(000103E0)
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//
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// XAudio2 uses XMA under the covers, and seems to map with the same
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// restrictions of frame/subframe/etc:
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// https://msdn.microsoft.com/en-us/library/windows/desktop/microsoft.directx_sdk.xaudio2.xaudio2_buffer(v=vs.85).aspx
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SHIM_CALL XMACreateContext_shim(PPCContext* ppc_context,
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KernelState* kernel_state) {
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uint32_t context_out_ptr = SHIM_GET_ARG_32(0);
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XELOGD("XMACreateContext(%.8X)", context_out_ptr);
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auto xma_decoder = kernel_state->emulator()->xma_decoder();
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uint32_t context_ptr = xma_decoder->AllocateContext();
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SHIM_SET_MEM_32(context_out_ptr, context_ptr);
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if (!context_ptr) {
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SHIM_SET_RETURN_32(X_STATUS_NO_MEMORY);
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return;
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}
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SHIM_SET_RETURN_32(X_STATUS_SUCCESS);
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}
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SHIM_CALL XMAReleaseContext_shim(PPCContext* ppc_context,
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KernelState* kernel_state) {
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uint32_t context_ptr = SHIM_GET_ARG_32(0);
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XELOGD("XMAReleaseContext(%.8X)", context_ptr);
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auto xma_decoder = kernel_state->emulator()->xma_decoder();
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xma_decoder->ReleaseContext(context_ptr);
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SHIM_SET_RETURN_32(0);
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}
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void StoreXmaContextIndexedRegister(KernelState* kernel_state,
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uint32_t base_reg, uint32_t context_ptr) {
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auto xma_decoder = kernel_state->emulator()->xma_decoder();
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uint32_t hw_index = (context_ptr - xma_decoder->context_array_ptr()) /
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sizeof(XMA_CONTEXT_DATA);
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uint32_t reg_num = base_reg + (hw_index >> 5) * 4;
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uint32_t reg_value = 1 << (hw_index & 0x1F);
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xma_decoder->WriteRegister(reg_num, xe::byte_swap(reg_value));
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}
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struct XMA_LOOP_DATA {
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xe::be<uint32_t> loop_start;
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xe::be<uint32_t> loop_end;
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xe::be<uint8_t> loop_count;
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xe::be<uint8_t> loop_subframe_end;
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xe::be<uint8_t> loop_subframe_skip;
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};
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static_assert_size(XMA_LOOP_DATA, 12);
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struct XMA_CONTEXT_INIT {
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xe::be<uint32_t> input_buffer_0_ptr;
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xe::be<uint32_t> input_buffer_0_packet_count;
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xe::be<uint32_t> input_buffer_1_ptr;
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xe::be<uint32_t> input_buffer_1_packet_count;
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xe::be<uint32_t> input_buffer_read_offset;
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xe::be<uint32_t> output_buffer_ptr;
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xe::be<uint32_t> output_buffer_block_count;
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xe::be<uint32_t> work_buffer;
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xe::be<uint32_t> subframe_decode_count;
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xe::be<uint32_t> channel_count;
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xe::be<uint32_t> sample_rate;
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XMA_LOOP_DATA loop_data;
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};
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static_assert_size(XMA_CONTEXT_INIT, 56);
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dword_result_t XMAInitializeContext(lpvoid_t context_ptr,
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pointer_t<XMA_CONTEXT_INIT> context_init) {
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std::memset(context_ptr, 0, sizeof(XMA_CONTEXT_DATA));
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XMA_CONTEXT_DATA context(context_ptr);
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context.input_buffer_0_ptr = context_init->input_buffer_0_ptr;
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context.input_buffer_0_packet_count =
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context_init->input_buffer_0_packet_count;
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context.input_buffer_1_ptr = context_init->input_buffer_1_ptr;
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context.input_buffer_1_packet_count =
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context_init->input_buffer_1_packet_count;
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context.input_buffer_read_offset = context_init->input_buffer_read_offset;
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context.output_buffer_ptr = context_init->output_buffer_ptr;
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context.output_buffer_block_count = context_init->output_buffer_block_count;
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// context.work_buffer = context_init->work_buffer; // ?
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context.subframe_decode_count = context_init->subframe_decode_count;
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context.is_stereo = context_init->channel_count == 2;
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context.sample_rate = context_init->sample_rate;
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context.loop_start = context_init->loop_data.loop_start;
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context.loop_end = context_init->loop_data.loop_end;
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context.loop_count = context_init->loop_data.loop_count;
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context.loop_subframe_end = context_init->loop_data.loop_subframe_end;
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context.loop_subframe_skip = context_init->loop_data.loop_subframe_skip;
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context.Store(context_ptr);
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StoreXmaContextIndexedRegister(kernel_state(), 0x1A80, context_ptr);
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return 0;
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}
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DECLARE_XBOXKRNL_EXPORT(XMAInitializeContext,
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ExportTag::kImplemented | ExportTag::kAudio);
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SHIM_CALL XMASetLoopData_shim(PPCContext* ppc_context,
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KernelState* kernel_state) {
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uint32_t context_ptr = SHIM_GET_ARG_32(0);
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uint32_t loop_data_ptr = SHIM_GET_ARG_32(1);
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XELOGD("XMASetLoopData(%.8X, %.8X)", context_ptr, loop_data_ptr);
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XMA_CONTEXT_DATA context(SHIM_MEM_ADDR(context_ptr));
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auto loop_data = (XMA_CONTEXT_DATA*)SHIM_MEM_ADDR(loop_data_ptr);
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context.loop_start = loop_data->loop_start;
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context.loop_end = loop_data->loop_end;
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context.loop_count = loop_data->loop_count;
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context.loop_subframe_end = loop_data->loop_subframe_end;
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context.loop_subframe_skip = loop_data->loop_subframe_end;
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context.Store(SHIM_MEM_ADDR(context_ptr));
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SHIM_SET_RETURN_32(0);
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}
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dword_result_t XMAGetInputBufferReadOffset(lpvoid_t context_ptr) {
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XMA_CONTEXT_DATA context(context_ptr);
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return context.input_buffer_read_offset;
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}
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DECLARE_XBOXKRNL_EXPORT(XMAGetInputBufferReadOffset,
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ExportTag::kImplemented | ExportTag::kAudio);
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dword_result_t XMASetInputBufferReadOffset(lpvoid_t context_ptr,
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dword_t value) {
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XMA_CONTEXT_DATA context(context_ptr);
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context.input_buffer_read_offset = value;
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context.Store(context_ptr);
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return 0;
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}
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DECLARE_XBOXKRNL_EXPORT(XMASetInputBufferReadOffset,
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ExportTag::kImplemented | ExportTag::kAudio);
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dword_result_t XMASetInputBuffer0(lpvoid_t context_ptr, lpvoid_t buffer,
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dword_t packet_count) {
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XMA_CONTEXT_DATA context(context_ptr);
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context.input_buffer_0_ptr = buffer.guest_address();
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context.input_buffer_0_packet_count = packet_count;
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context.Store(context_ptr);
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return 0;
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}
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DECLARE_XBOXKRNL_EXPORT(XMASetInputBuffer0,
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ExportTag::kImplemented | ExportTag::kAudio);
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dword_result_t XMAIsInputBuffer0Valid(lpvoid_t context_ptr) {
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XMA_CONTEXT_DATA context(context_ptr);
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return context.input_buffer_0_valid;
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}
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DECLARE_XBOXKRNL_EXPORT(XMAIsInputBuffer0Valid,
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ExportTag::kImplemented | ExportTag::kAudio);
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dword_result_t XMASetInputBuffer0Valid(lpvoid_t context_ptr) {
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XMA_CONTEXT_DATA context(context_ptr);
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context.input_buffer_0_valid = 1;
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context.Store(context_ptr);
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return 0;
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}
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DECLARE_XBOXKRNL_EXPORT(XMASetInputBuffer0Valid,
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ExportTag::kImplemented | ExportTag::kAudio);
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dword_result_t XMASetInputBuffer1(lpvoid_t context_ptr, lpvoid_t buffer,
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dword_t packet_count) {
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XMA_CONTEXT_DATA context(context_ptr);
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context.input_buffer_1_ptr = buffer.guest_address();
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context.input_buffer_1_packet_count = packet_count;
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context.Store(context_ptr);
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return 0;
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}
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DECLARE_XBOXKRNL_EXPORT(XMASetInputBuffer1,
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ExportTag::kImplemented | ExportTag::kAudio);
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dword_result_t XMAIsInputBuffer1Valid(lpvoid_t context_ptr) {
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XMA_CONTEXT_DATA context(context_ptr);
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return context.input_buffer_1_valid;
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}
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DECLARE_XBOXKRNL_EXPORT(XMAIsInputBuffer1Valid,
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ExportTag::kImplemented | ExportTag::kAudio);
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dword_result_t XMASetInputBuffer1Valid(lpvoid_t context_ptr) {
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XMA_CONTEXT_DATA context(context_ptr);
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context.input_buffer_1_valid = 1;
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context.Store(context_ptr);
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return 0;
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}
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DECLARE_XBOXKRNL_EXPORT(XMASetInputBuffer1Valid,
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ExportTag::kImplemented | ExportTag::kAudio);
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dword_result_t XMAIsOutputBufferValid(lpvoid_t context_ptr) {
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XMA_CONTEXT_DATA context(context_ptr);
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return context.output_buffer_valid;
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}
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DECLARE_XBOXKRNL_EXPORT(XMAIsOutputBufferValid,
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ExportTag::kImplemented | ExportTag::kAudio);
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dword_result_t XMASetOutputBufferValid(lpvoid_t context_ptr) {
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XMA_CONTEXT_DATA context(context_ptr);
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context.output_buffer_valid = 1;
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context.Store(context_ptr);
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return 0;
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}
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DECLARE_XBOXKRNL_EXPORT(XMASetOutputBufferValid,
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ExportTag::kImplemented | ExportTag::kAudio);
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dword_result_t XMAGetOutputBufferReadOffset(lpvoid_t context_ptr) {
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XMA_CONTEXT_DATA context(context_ptr);
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return context.output_buffer_read_offset;
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}
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DECLARE_XBOXKRNL_EXPORT(XMAGetOutputBufferReadOffset,
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ExportTag::kImplemented | ExportTag::kAudio);
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dword_result_t XMASetOutputBufferReadOffset(lpvoid_t context_ptr,
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dword_t value) {
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XMA_CONTEXT_DATA context(context_ptr);
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context.output_buffer_read_offset = value;
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context.Store(context_ptr);
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return 0;
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}
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DECLARE_XBOXKRNL_EXPORT(XMASetOutputBufferReadOffset,
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ExportTag::kImplemented | ExportTag::kAudio);
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dword_result_t XMAGetOutputBufferWriteOffset(lpvoid_t context_ptr) {
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XMA_CONTEXT_DATA context(context_ptr);
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return context.output_buffer_write_offset;
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}
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DECLARE_XBOXKRNL_EXPORT(XMAGetOutputBufferWriteOffset,
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ExportTag::kImplemented | ExportTag::kAudio);
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dword_result_t XMAGetPacketMetadata(lpvoid_t context_ptr) {
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XMA_CONTEXT_DATA context(context_ptr);
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return context.packet_metadata;
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}
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DECLARE_XBOXKRNL_EXPORT(XMAGetPacketMetadata,
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ExportTag::kImplemented | ExportTag::kAudio);
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SHIM_CALL XMAEnableContext_shim(PPCContext* ppc_context,
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KernelState* kernel_state) {
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uint32_t context_ptr = SHIM_GET_ARG_32(0);
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XELOGD("XMAEnableContext(%.8X)", context_ptr);
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StoreXmaContextIndexedRegister(kernel_state, 0x1940, context_ptr);
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SHIM_SET_RETURN_32(0);
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}
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SHIM_CALL XMADisableContext_shim(PPCContext* ppc_context,
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KernelState* kernel_state) {
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uint32_t context_ptr = SHIM_GET_ARG_32(0);
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uint32_t wait = SHIM_GET_ARG_32(1);
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XELOGD("XMADisableContext(%.8X, %d)", context_ptr, wait);
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X_HRESULT result = X_E_SUCCESS;
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StoreXmaContextIndexedRegister(kernel_state, 0x1A40, context_ptr);
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if (!kernel_state->emulator()->xma_decoder()->BlockOnContext(context_ptr,
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!wait)) {
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result = X_E_FALSE;
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}
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SHIM_SET_RETURN_32(result);
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}
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SHIM_CALL XMABlockWhileInUse_shim(PPCContext* ppc_context,
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KernelState* kernel_state) {
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uint32_t context_ptr = SHIM_GET_ARG_32(0);
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XELOGD("XMABlockWhileInUse(%.8X)", context_ptr);
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do {
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XMA_CONTEXT_DATA context(SHIM_MEM_ADDR(context_ptr));
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if (!context.input_buffer_0_valid && !context.input_buffer_1_valid) {
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break;
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}
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Sleep(1);
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} while (true);
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SHIM_SET_RETURN_32(0);
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}
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} // namespace kernel
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} // namespace xe
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void xe::kernel::xboxkrnl::RegisterAudioXmaExports(
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xe::cpu::ExportResolver* export_resolver, KernelState* kernel_state) {
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// Used for both XMA* methods and direct register access.
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SHIM_SET_MAPPING("xboxkrnl.exe", XMACreateContext, state);
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SHIM_SET_MAPPING("xboxkrnl.exe", XMAReleaseContext, state);
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// Only used in older games.
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SHIM_SET_MAPPING("xboxkrnl.exe", XMASetLoopData, state);
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SHIM_SET_MAPPING("xboxkrnl.exe", XMAEnableContext, state);
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SHIM_SET_MAPPING("xboxkrnl.exe", XMADisableContext, state);
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SHIM_SET_MAPPING("xboxkrnl.exe", XMABlockWhileInUse, state);
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}
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