mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-25 16:37:42 +01:00
99 lines
3.7 KiB
C
99 lines
3.7 KiB
C
/*
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* File: WaveLib.c
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*
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* Description: WAVE file format functions.
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*
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* Copyright (c) 2018 John Davis
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <Uefi.h>
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#include <Library/BaseLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/UefiLib.h>
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#include <Library/WaveLib.h>
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#include <Library/MemoryAllocationLib.h>
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EFI_STATUS
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EFIAPI
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WaveGetFileData(
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IN CONST VOID *FileData,
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IN UINTN FileLength,
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OUT WAVE_FILE_DATA *WaveFileData)
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{
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// Create variables.
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UINT8 *FilePtr = NULL;
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RIFF_CHUNK *RiffChunk = NULL;
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RIFF_CHUNK *FormatChunk = NULL;
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RIFF_CHUNK *DataChunk = NULL;
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// Ensure parameters are valid.
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if ((FileData == NULL) || (FileLength == 0) || (WaveFileData == NULL))
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return EFI_INVALID_PARAMETER;
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FilePtr = (UINT8*)FileData;
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// Get RIFF chunk (should be first).
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RiffChunk = (RIFF_CHUNK*)FilePtr;
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// Ensure chunk ID is RIFF and the first 4 bytes of data are WAVE.
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if (AsciiStrnCmp(RiffChunk->Id, RIFF_CHUNK_ID, RIFF_CHUNK_ID_SIZE) ||
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AsciiStrnCmp((CHAR8*)RiffChunk->Data, WAVE_CHUNK_ID, RIFF_CHUNK_ID_SIZE) || (
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(RiffChunk->Size + sizeof(RiffChunk->Id) + sizeof(RiffChunk->Size)) != FileLength))
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return EFI_UNSUPPORTED;
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// Move to data area.
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FilePtr += sizeof(RIFF_CHUNK);
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// Get index of format chunk.
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for (UINTN i = FilePtr - (UINT8*)FileData; i < FileLength; i++) {
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if (AsciiStrnCmp((CHAR8*)(((UINT8*)FileData) + i), WAVE_FORMAT_CHUNK_ID, RIFF_CHUNK_ID_SIZE) == 0) {
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FilePtr = (UINT8*)FileData + i;
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FormatChunk = (RIFF_CHUNK*)FilePtr;
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break;
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}
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}
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if (FormatChunk == NULL)
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return EFI_UNSUPPORTED;
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// Get index of data chunk.
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for (UINTN i = FilePtr - (UINT8*)FileData; i < FileLength; i++) {
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if (AsciiStrnCmp((CHAR8*)(((UINT8*)FileData) + i), WAVE_DATA_CHUNK_ID, RIFF_CHUNK_ID_SIZE) == 0) {
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FilePtr = (UINT8*)FileData + i;
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DataChunk = (RIFF_CHUNK*)FilePtr;
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break;
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}
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}
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if (DataChunk == NULL)
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return EFI_UNSUPPORTED;
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// Copy to output structure.
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ZeroMem(WaveFileData, sizeof(WAVE_FILE_DATA));
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WaveFileData->FileLength = FileLength;
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WaveFileData->DataLength = RiffChunk->Size;
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WaveFileData->Format = (WAVE_FORMAT_DATA*)AllocateCopyPool(sizeof(WAVE_FORMAT_DATA), FormatChunk->Data);
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WaveFileData->FormatLength = FormatChunk->Size;
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// WaveFileData->Samples = AllocateCopyPool(DataChunk->Size, DataChunk->Data);
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WaveFileData->Samples = AllocateAlignedPages(EFI_SIZE_TO_PAGES(DataChunk->Size+4095), 128);
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CopyMem(WaveFileData->Samples, DataChunk->Data, DataChunk->Size);
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WaveFileData->SamplesLength = DataChunk->Size;
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return EFI_SUCCESS;
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}
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