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#include "util.h"
#include <bfc/platform/types.h>
#include <mferror.h>
#include <mftransform.h>
#include <wmcodecdsp.h>
#include <Mfidl.h>
#include <Mfapi.h>
struct AACUserData {
WORD wPayloadType;
WORD wAudioProfileLevelIndication;
WORD wStructType;
WORD wReserved1;
DWORD dwReserved2;
uint8_t buffer[16];
};
HRESULT GetAACCodec(IMFTransform **pDecoder)
{
HRESULT hr = S_OK;
UINT32 count = 0;
IMFActivate **ppActivate = NULL; // Array of activation objects.
MFT_REGISTER_TYPE_INFO info = { MFMediaType_Audio, MFAudioFormat_AAC };
UINT32 unFlags = MFT_ENUM_FLAG_SYNCMFT |
MFT_ENUM_FLAG_LOCALMFT |
MFT_ENUM_FLAG_SORTANDFILTER;
hr = MFTEnumEx(
MFT_CATEGORY_AUDIO_DECODER,
unFlags,
&info, // Input type
NULL, // Output type
&ppActivate,
&count
);
if (SUCCEEDED(hr) && count == 0)
{
hr = MF_E_TOPO_CODEC_NOT_FOUND;
}
// Create the first decoder in the list.
if (SUCCEEDED(hr))
{
hr = ppActivate[0]->ActivateObject(IID_PPV_ARGS(pDecoder));
}
for (UINT32 i = 0; i < count; i++)
{
ppActivate[i]->Release();
}
CoTaskMemFree(ppActivate);
return hr;
}
bool AssociateFloat(IMFTransform *decoder)
{
IMFMediaType *media_type;
DWORD index=0;
for (;;)
{
GUID subtype;
UINT32 bps;
HRESULT hr = decoder->GetOutputAvailableType(0, index++, &media_type);
if (hr != S_OK)
return false;
if (media_type->GetGUID(MF_MT_SUBTYPE, &subtype) != S_OK
|| media_type->GetUINT32(MF_MT_AUDIO_BITS_PER_SAMPLE, &bps) != S_OK)
{
media_type->Release();
return false;
}
if (subtype == MFAudioFormat_Float && bps == 32)
{
hr = decoder->SetOutputType(0, media_type, 0);
media_type->Release();
return true;
}
media_type->Release();
}
}
static uint32_t SampleRateForASC(const void *asc, size_t aacConfigLength)
{
const uint8_t *pAacConfig = (const uint8_t *)asc;
const uint32_t samplingRates[]={96000,88200,64000,48000,44100,32000,24000,22050,16000,12000,11025,8000,0};
int index;
if (aacConfigLength >= 5 && (pAacConfig[4] >> 7) == 1)
{
index = (pAacConfig[4] >> 3) & 0x7;
} else if (aacConfigLength >= 2) {
index = ((pAacConfig[0] & 0x7) << 1) | (pAacConfig[1] >> 7); // bits 5-8
} else {
index = 12;
}
return samplingRates[index];
}
HRESULT CreateAACDecoder(IMFTransform **pDecoder, const void *asc, size_t asc_bytes)
{
HRESULT hr;
IMFMediaType *media_type;
hr = GetAACCodec(pDecoder);
if (FAILED(hr)) {
return hr;
}
hr = MFCreateMediaType(&media_type);
if (FAILED(hr)) {
return hr;
}
hr = media_type->SetGUID(MF_MT_MAJOR_TYPE, MFMediaType_Audio);
hr = media_type->SetGUID(MF_MT_SUBTYPE, MFAudioFormat_AAC);
//
hr = media_type->SetUINT32(MF_MT_AAC_PAYLOAD_TYPE, 0); // The stream contains raw_data_block elements only.
uint8_t profile_level =0xFE;// MP4GetAudioProfileLevel(mp4_file);
hr = media_type->SetUINT32(MF_MT_AAC_AUDIO_PROFILE_LEVEL_INDICATION, profile_level);
media_type->SetUINT32(MF_MT_AUDIO_SAMPLES_PER_SECOND, SampleRateForASC(asc, asc_bytes));
// this is such a pain in the ass, it's part of an HEAACWAVEINFO struct packed together with the ASC data
AACUserData aacinfo;
aacinfo.wPayloadType = 0;
aacinfo.wAudioProfileLevelIndication = profile_level;
aacinfo.wStructType = 0;
if (asc && asc_bytes) {
if (asc_bytes > 16) { // don't overrun the buffer
return E_FAIL;
}
memcpy(aacinfo.buffer, asc, asc_bytes);
hr = media_type->SetBlob(MF_MT_USER_DATA, (const UINT8 *)&aacinfo, 12+(UINT)asc_bytes);
}
hr = (*pDecoder)->SetInputType(0, media_type, 0);
if (FAILED(hr)) {
return hr;
}
media_type->Release();
media_type=0;
AssociateFloat(*pDecoder);
return S_OK;
}
HRESULT CreateADTSDecoder(IMFTransform **pDecoder)
{
HRESULT hr;
IMFMediaType *media_type;
hr = GetAACCodec(pDecoder);
if (FAILED(hr)) {
return hr;
}
hr = MFCreateMediaType(&media_type);
if (FAILED(hr)) {
return hr;
}
hr = media_type->SetGUID(MF_MT_MAJOR_TYPE, MFMediaType_Audio);
hr = media_type->SetGUID(MF_MT_SUBTYPE, MFAudioFormat_AAC);
hr = media_type->SetUINT32(MF_MT_AAC_PAYLOAD_TYPE, 1); // ADTS
//hr = media_type->SetUINT32(MF_MT_AUDIO_BITS_PER_SAMPLE, 16); // 16 bits per sample
uint8_t profile_level =0xFE;// MP4GetAudioProfileLevel(mp4_file);
hr = media_type->SetUINT32(MF_MT_AAC_AUDIO_PROFILE_LEVEL_INDICATION, profile_level);
const BYTE user_data[] = {0x01, 0x00, 0xFE, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
hr = media_type->SetBlob(MF_MT_USER_DATA, user_data, sizeof(user_data));
hr = (*pDecoder)->SetInputType(0, media_type, 0);
if (FAILED(hr)) {
return hr;
}
media_type->Release();
media_type=0;
AssociateFloat(*pDecoder);
return S_OK;
}
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