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ffmpeg/libavcodec/mf_utils.c
Trystan Mata 1cb601ad10 avcodec/mfenc: Dynamically load MFPlat.DLL 
Allows non-UWP builds of FFmpeg with MediaFoundation to work on
N editions of Windows which are without MediaFoundation by default.

On UWP target, FFmpeg is linked directly against MediaFoundation since
LoadLibrary is not available.

This commit adresses https://trac.ffmpeg.org/ticket/9788

Signed-off-by: Martin Storsjö <martin@martin.st>
2022-05-25 23:45:42 +03:00

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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#define COBJMACROS
#if !defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0602
#undef _WIN32_WINNT
#define _WIN32_WINNT 0x0602
#endif
#include "mf_utils.h"
#include "libavutil/pixdesc.h"
HRESULT ff_MFGetAttributeSize(IMFAttributes *pattr, REFGUID guid,
UINT32 *pw, UINT32 *ph)
{
UINT64 t;
HRESULT hr = IMFAttributes_GetUINT64(pattr, guid, &t);
if (!FAILED(hr)) {
*pw = t >> 32;
*ph = (UINT32)t;
}
return hr;
}
HRESULT ff_MFSetAttributeSize(IMFAttributes *pattr, REFGUID guid,
UINT32 uw, UINT32 uh)
{
UINT64 t = (((UINT64)uw) << 32) | uh;
return IMFAttributes_SetUINT64(pattr, guid, t);
}
#define ff_MFSetAttributeRatio ff_MFSetAttributeSize
#define ff_MFGetAttributeRatio ff_MFGetAttributeSize
char *ff_hr_str_buf(char *buf, size_t size, HRESULT hr)
{
#define HR(x) case x: return (char *) # x;
switch (hr) {
HR(S_OK)
HR(E_UNEXPECTED)
HR(MF_E_INVALIDMEDIATYPE)
HR(MF_E_INVALIDSTREAMNUMBER)
HR(MF_E_INVALIDTYPE)
HR(MF_E_TRANSFORM_CANNOT_CHANGE_MEDIATYPE_WHILE_PROCESSING)
HR(MF_E_TRANSFORM_TYPE_NOT_SET)
HR(MF_E_UNSUPPORTED_D3D_TYPE)
HR(MF_E_TRANSFORM_NEED_MORE_INPUT)
HR(MF_E_TRANSFORM_STREAM_CHANGE)
HR(MF_E_NOTACCEPTING)
HR(MF_E_NO_SAMPLE_TIMESTAMP)
HR(MF_E_NO_SAMPLE_DURATION)
#undef HR
}
snprintf(buf, size, "%x", (unsigned)hr);
return buf;
}
// If fill_data!=NULL, initialize the buffer and set the length. (This is a
// subtle but important difference: some decoders want CurrentLength==0 on
// provided output buffers.)
IMFSample *ff_create_memory_sample(MFFunctions *f,void *fill_data, size_t size,
size_t align)
{
HRESULT hr;
IMFSample *sample;
IMFMediaBuffer *buffer;
hr = f->MFCreateSample(&sample);
if (FAILED(hr))
return NULL;
align = FFMAX(align, 16); // 16 is "recommended", even if not required
hr = f->MFCreateAlignedMemoryBuffer(size, align - 1, &buffer);
if (FAILED(hr))
return NULL;
if (fill_data) {
BYTE *tmp;
hr = IMFMediaBuffer_Lock(buffer, &tmp, NULL, NULL);
if (FAILED(hr)) {
IMFMediaBuffer_Release(buffer);
IMFSample_Release(sample);
return NULL;
}
memcpy(tmp, fill_data, size);
IMFMediaBuffer_SetCurrentLength(buffer, size);
IMFMediaBuffer_Unlock(buffer);
}
IMFSample_AddBuffer(sample, buffer);
IMFMediaBuffer_Release(buffer);
return sample;
}
enum AVSampleFormat ff_media_type_to_sample_fmt(IMFAttributes *type)
{
HRESULT hr;
UINT32 bits;
GUID subtype;
hr = IMFAttributes_GetUINT32(type, &MF_MT_AUDIO_BITS_PER_SAMPLE, &bits);
if (FAILED(hr))
return AV_SAMPLE_FMT_NONE;
hr = IMFAttributes_GetGUID(type, &MF_MT_SUBTYPE, &subtype);
if (FAILED(hr))
return AV_SAMPLE_FMT_NONE;
if (IsEqualGUID(&subtype, &MFAudioFormat_PCM)) {
switch (bits) {
case 8: return AV_SAMPLE_FMT_U8;
case 16: return AV_SAMPLE_FMT_S16;
case 32: return AV_SAMPLE_FMT_S32;
}
} else if (IsEqualGUID(&subtype, &MFAudioFormat_Float)) {
switch (bits) {
case 32: return AV_SAMPLE_FMT_FLT;
case 64: return AV_SAMPLE_FMT_DBL;
}
}
return AV_SAMPLE_FMT_NONE;
}
struct mf_pix_fmt_entry {
const GUID *guid;
enum AVPixelFormat pix_fmt;
};
static const struct mf_pix_fmt_entry mf_pix_fmts[] = {
{&MFVideoFormat_IYUV, AV_PIX_FMT_YUV420P},
{&MFVideoFormat_I420, AV_PIX_FMT_YUV420P},
{&MFVideoFormat_NV12, AV_PIX_FMT_NV12},
{&MFVideoFormat_P010, AV_PIX_FMT_P010},
{&MFVideoFormat_P016, AV_PIX_FMT_P010}, // not equal, but compatible
{&MFVideoFormat_YUY2, AV_PIX_FMT_YUYV422},
};
enum AVPixelFormat ff_media_type_to_pix_fmt(IMFAttributes *type)
{
HRESULT hr;
GUID subtype;
int i;
hr = IMFAttributes_GetGUID(type, &MF_MT_SUBTYPE, &subtype);
if (FAILED(hr))
return AV_PIX_FMT_NONE;
for (i = 0; i < FF_ARRAY_ELEMS(mf_pix_fmts); i++) {
if (IsEqualGUID(&subtype, mf_pix_fmts[i].guid))
return mf_pix_fmts[i].pix_fmt;
}
return AV_PIX_FMT_NONE;
}
const GUID *ff_pix_fmt_to_guid(enum AVPixelFormat pix_fmt)
{
int i;
for (i = 0; i < FF_ARRAY_ELEMS(mf_pix_fmts); i++) {
if (mf_pix_fmts[i].pix_fmt == pix_fmt)
return mf_pix_fmts[i].guid;
}
return NULL;
}
// If this GUID is of the form XXXXXXXX-0000-0010-8000-00AA00389B71, then
// extract the XXXXXXXX prefix as FourCC (oh the pain).
int ff_fourcc_from_guid(const GUID *guid, uint32_t *out_fourcc)
{
if (guid->Data2 == 0 && guid->Data3 == 0x0010 &&
guid->Data4[0] == 0x80 &&
guid->Data4[1] == 0x00 &&
guid->Data4[2] == 0x00 &&
guid->Data4[3] == 0xAA &&
guid->Data4[4] == 0x00 &&
guid->Data4[5] == 0x38 &&
guid->Data4[6] == 0x9B &&
guid->Data4[7] == 0x71) {
*out_fourcc = guid->Data1;
return 0;
}
*out_fourcc = 0;
return AVERROR_UNKNOWN;
}
struct GUID_Entry {
const GUID *guid;
const char *name;
};
#define GUID_ENTRY(var) {&(var), # var}
static struct GUID_Entry guid_names[] = {
GUID_ENTRY(MFT_FRIENDLY_NAME_Attribute),
GUID_ENTRY(MFT_TRANSFORM_CLSID_Attribute),
GUID_ENTRY(MFT_ENUM_HARDWARE_URL_Attribute),
GUID_ENTRY(MFT_CONNECTED_STREAM_ATTRIBUTE),
GUID_ENTRY(MFT_CONNECTED_TO_HW_STREAM),
GUID_ENTRY(MF_SA_D3D_AWARE),
GUID_ENTRY(ff_MF_SA_MINIMUM_OUTPUT_SAMPLE_COUNT),
GUID_ENTRY(ff_MF_SA_MINIMUM_OUTPUT_SAMPLE_COUNT_PROGRESSIVE),
GUID_ENTRY(ff_MF_SA_D3D11_BINDFLAGS),
GUID_ENTRY(ff_MF_SA_D3D11_USAGE),
GUID_ENTRY(ff_MF_SA_D3D11_AWARE),
GUID_ENTRY(ff_MF_SA_D3D11_SHARED),
GUID_ENTRY(ff_MF_SA_D3D11_SHARED_WITHOUT_MUTEX),
GUID_ENTRY(MF_MT_SUBTYPE),
GUID_ENTRY(MF_MT_MAJOR_TYPE),
GUID_ENTRY(MF_MT_AUDIO_SAMPLES_PER_SECOND),
GUID_ENTRY(MF_MT_AUDIO_NUM_CHANNELS),
GUID_ENTRY(MF_MT_AUDIO_CHANNEL_MASK),
GUID_ENTRY(MF_MT_FRAME_SIZE),
GUID_ENTRY(MF_MT_INTERLACE_MODE),
GUID_ENTRY(MF_MT_USER_DATA),
GUID_ENTRY(MF_MT_PIXEL_ASPECT_RATIO),
GUID_ENTRY(MFMediaType_Audio),
GUID_ENTRY(MFMediaType_Video),
GUID_ENTRY(MFAudioFormat_PCM),
GUID_ENTRY(MFAudioFormat_Float),
GUID_ENTRY(MFVideoFormat_H264),
GUID_ENTRY(MFVideoFormat_H264_ES),
GUID_ENTRY(ff_MFVideoFormat_HEVC),
GUID_ENTRY(ff_MFVideoFormat_HEVC_ES),
GUID_ENTRY(MFVideoFormat_MPEG2),
GUID_ENTRY(MFVideoFormat_MP43),
GUID_ENTRY(MFVideoFormat_MP4V),
GUID_ENTRY(MFVideoFormat_WMV1),
GUID_ENTRY(MFVideoFormat_WMV2),
GUID_ENTRY(MFVideoFormat_WMV3),
GUID_ENTRY(MFVideoFormat_WVC1),
GUID_ENTRY(MFAudioFormat_Dolby_AC3),
GUID_ENTRY(MFAudioFormat_Dolby_DDPlus),
GUID_ENTRY(MFAudioFormat_AAC),
GUID_ENTRY(MFAudioFormat_MP3),
GUID_ENTRY(MFAudioFormat_MSP1),
GUID_ENTRY(MFAudioFormat_WMAudioV8),
GUID_ENTRY(MFAudioFormat_WMAudioV9),
GUID_ENTRY(MFAudioFormat_WMAudio_Lossless),
GUID_ENTRY(MF_MT_ALL_SAMPLES_INDEPENDENT),
GUID_ENTRY(MF_MT_COMPRESSED),
GUID_ENTRY(MF_MT_FIXED_SIZE_SAMPLES),
GUID_ENTRY(MF_MT_SAMPLE_SIZE),
GUID_ENTRY(MF_MT_WRAPPED_TYPE),
GUID_ENTRY(MF_MT_AAC_AUDIO_PROFILE_LEVEL_INDICATION),
GUID_ENTRY(MF_MT_AAC_PAYLOAD_TYPE),
GUID_ENTRY(MF_MT_AUDIO_AVG_BYTES_PER_SECOND),
GUID_ENTRY(MF_MT_AUDIO_BITS_PER_SAMPLE),
GUID_ENTRY(MF_MT_AUDIO_BLOCK_ALIGNMENT),
GUID_ENTRY(MF_MT_AUDIO_CHANNEL_MASK),
GUID_ENTRY(MF_MT_AUDIO_FLOAT_SAMPLES_PER_SECOND),
GUID_ENTRY(MF_MT_AUDIO_FOLDDOWN_MATRIX),
GUID_ENTRY(MF_MT_AUDIO_NUM_CHANNELS),
GUID_ENTRY(MF_MT_AUDIO_PREFER_WAVEFORMATEX),
GUID_ENTRY(MF_MT_AUDIO_SAMPLES_PER_BLOCK),
GUID_ENTRY(MF_MT_AUDIO_SAMPLES_PER_SECOND),
GUID_ENTRY(MF_MT_AUDIO_VALID_BITS_PER_SAMPLE),
GUID_ENTRY(MF_MT_AUDIO_WMADRC_AVGREF),
GUID_ENTRY(MF_MT_AUDIO_WMADRC_AVGTARGET),
GUID_ENTRY(MF_MT_AUDIO_WMADRC_PEAKREF),
GUID_ENTRY(MF_MT_AUDIO_WMADRC_PEAKTARGET),
GUID_ENTRY(MF_MT_AVG_BIT_ERROR_RATE),
GUID_ENTRY(MF_MT_AVG_BITRATE),
GUID_ENTRY(MF_MT_DEFAULT_STRIDE),
GUID_ENTRY(MF_MT_DRM_FLAGS),
GUID_ENTRY(MF_MT_FRAME_RATE),
GUID_ENTRY(MF_MT_FRAME_RATE_RANGE_MAX),
GUID_ENTRY(MF_MT_FRAME_RATE_RANGE_MIN),
GUID_ENTRY(MF_MT_FRAME_SIZE),
GUID_ENTRY(MF_MT_GEOMETRIC_APERTURE),
GUID_ENTRY(MF_MT_INTERLACE_MODE),
GUID_ENTRY(MF_MT_MAX_KEYFRAME_SPACING),
GUID_ENTRY(MF_MT_MINIMUM_DISPLAY_APERTURE),
GUID_ENTRY(MF_MT_MPEG_SEQUENCE_HEADER),
GUID_ENTRY(MF_MT_MPEG_START_TIME_CODE),
GUID_ENTRY(MF_MT_MPEG2_FLAGS),
GUID_ENTRY(MF_MT_MPEG2_LEVEL),
GUID_ENTRY(MF_MT_MPEG2_PROFILE),
GUID_ENTRY(MF_MT_PAD_CONTROL_FLAGS),
GUID_ENTRY(MF_MT_PALETTE),
GUID_ENTRY(MF_MT_PAN_SCAN_APERTURE),
GUID_ENTRY(MF_MT_PAN_SCAN_ENABLED),
GUID_ENTRY(MF_MT_PIXEL_ASPECT_RATIO),
GUID_ENTRY(MF_MT_SOURCE_CONTENT_HINT),
GUID_ENTRY(MF_MT_TRANSFER_FUNCTION),
GUID_ENTRY(MF_MT_VIDEO_CHROMA_SITING),
GUID_ENTRY(MF_MT_VIDEO_LIGHTING),
GUID_ENTRY(MF_MT_VIDEO_NOMINAL_RANGE),
GUID_ENTRY(MF_MT_VIDEO_PRIMARIES),
GUID_ENTRY(MF_MT_VIDEO_ROTATION),
GUID_ENTRY(MF_MT_YUV_MATRIX),
GUID_ENTRY(ff_CODECAPI_AVDecVideoThumbnailGenerationMode),
GUID_ENTRY(ff_CODECAPI_AVDecVideoDropPicWithMissingRef),
GUID_ENTRY(ff_CODECAPI_AVDecVideoSoftwareDeinterlaceMode),
GUID_ENTRY(ff_CODECAPI_AVDecVideoFastDecodeMode),
GUID_ENTRY(ff_CODECAPI_AVLowLatencyMode),
GUID_ENTRY(ff_CODECAPI_AVDecVideoH264ErrorConcealment),
GUID_ENTRY(ff_CODECAPI_AVDecVideoMPEG2ErrorConcealment),
GUID_ENTRY(ff_CODECAPI_AVDecVideoCodecType),
GUID_ENTRY(ff_CODECAPI_AVDecVideoDXVAMode),
GUID_ENTRY(ff_CODECAPI_AVDecVideoDXVABusEncryption),
GUID_ENTRY(ff_CODECAPI_AVDecVideoSWPowerLevel),
GUID_ENTRY(ff_CODECAPI_AVDecVideoMaxCodedWidth),
GUID_ENTRY(ff_CODECAPI_AVDecVideoMaxCodedHeight),
GUID_ENTRY(ff_CODECAPI_AVDecNumWorkerThreads),
GUID_ENTRY(ff_CODECAPI_AVDecSoftwareDynamicFormatChange),
GUID_ENTRY(ff_CODECAPI_AVDecDisableVideoPostProcessing),
};
char *ff_guid_str_buf(char *buf, size_t buf_size, const GUID *guid)
{
uint32_t fourcc;
int n;
for (n = 0; n < FF_ARRAY_ELEMS(guid_names); n++) {
if (IsEqualGUID(guid, guid_names[n].guid)) {
snprintf(buf, buf_size, "%s", guid_names[n].name);
return buf;
}
}
if (ff_fourcc_from_guid(guid, &fourcc) >= 0) {
snprintf(buf, buf_size, "<FourCC %s>", av_fourcc2str(fourcc));
return buf;
}
snprintf(buf, buf_size,
"{%8.8x-%4.4x-%4.4x-%2.2x%2.2x-%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x}",
(unsigned) guid->Data1, guid->Data2, guid->Data3,
guid->Data4[0], guid->Data4[1],
guid->Data4[2], guid->Data4[3],
guid->Data4[4], guid->Data4[5],
guid->Data4[6], guid->Data4[7]);
return buf;
}
void ff_attributes_dump(void *log, IMFAttributes *attrs)
{
HRESULT hr;
UINT32 count;
int n;
hr = IMFAttributes_GetCount(attrs, &count);
if (FAILED(hr))
return;
for (n = 0; n < count; n++) {
GUID key;
MF_ATTRIBUTE_TYPE type;
char extra[80] = {0};
const char *name = NULL;
hr = IMFAttributes_GetItemByIndex(attrs, n, &key, NULL);
if (FAILED(hr))
goto err;
name = ff_guid_str(&key);
if (IsEqualGUID(&key, &MF_MT_AUDIO_CHANNEL_MASK)) {
UINT32 v;
hr = IMFAttributes_GetUINT32(attrs, &key, &v);
if (FAILED(hr))
goto err;
snprintf(extra, sizeof(extra), " (0x%x)", (unsigned)v);
} else if (IsEqualGUID(&key, &MF_MT_FRAME_SIZE)) {
UINT32 w, h;
hr = ff_MFGetAttributeSize(attrs, &MF_MT_FRAME_SIZE, &w, &h);
if (FAILED(hr))
goto err;
snprintf(extra, sizeof(extra), " (%dx%d)", (int)w, (int)h);
} else if (IsEqualGUID(&key, &MF_MT_PIXEL_ASPECT_RATIO) ||
IsEqualGUID(&key, &MF_MT_FRAME_RATE)) {
UINT32 num, den;
hr = ff_MFGetAttributeRatio(attrs, &key, &num, &den);
if (FAILED(hr))
goto err;
snprintf(extra, sizeof(extra), " (%d:%d)", (int)num, (int)den);
}
hr = IMFAttributes_GetItemType(attrs, &key, &type);
if (FAILED(hr))
goto err;
switch (type) {
case MF_ATTRIBUTE_UINT32: {
UINT32 v;
hr = IMFAttributes_GetUINT32(attrs, &key, &v);
if (FAILED(hr))
goto err;
av_log(log, AV_LOG_VERBOSE, " %s=%d%s\n", name, (int)v, extra);
break;
case MF_ATTRIBUTE_UINT64: {
UINT64 v;
hr = IMFAttributes_GetUINT64(attrs, &key, &v);
if (FAILED(hr))
goto err;
av_log(log, AV_LOG_VERBOSE, " %s=%lld%s\n", name, (long long)v, extra);
break;
}
case MF_ATTRIBUTE_DOUBLE: {
DOUBLE v;
hr = IMFAttributes_GetDouble(attrs, &key, &v);
if (FAILED(hr))
goto err;
av_log(log, AV_LOG_VERBOSE, " %s=%f%s\n", name, (double)v, extra);
break;
}
case MF_ATTRIBUTE_STRING: {
wchar_t s[512]; // being lazy here
hr = IMFAttributes_GetString(attrs, &key, s, sizeof(s), NULL);
if (FAILED(hr))
goto err;
av_log(log, AV_LOG_VERBOSE, " %s='%ls'%s\n", name, s, extra);
break;
}
case MF_ATTRIBUTE_GUID: {
GUID v;
hr = IMFAttributes_GetGUID(attrs, &key, &v);
if (FAILED(hr))
goto err;
av_log(log, AV_LOG_VERBOSE, " %s=%s%s\n", name, ff_guid_str(&v), extra);
break;
}
case MF_ATTRIBUTE_BLOB: {
UINT32 sz;
UINT8 buffer[100];
hr = IMFAttributes_GetBlobSize(attrs, &key, &sz);
if (FAILED(hr))
goto err;
if (sz <= sizeof(buffer)) {
// hex-dump it
char str[512] = {0};
size_t pos = 0;
hr = IMFAttributes_GetBlob(attrs, &key, buffer, sizeof(buffer), &sz);
if (FAILED(hr))
goto err;
for (pos = 0; pos < sz; pos++) {
const char *hex = "0123456789ABCDEF";
if (pos * 3 + 3 > sizeof(str))
break;
str[pos * 3 + 0] = hex[buffer[pos] >> 4];
str[pos * 3 + 1] = hex[buffer[pos] & 15];
str[pos * 3 + 2] = ' ';
}
str[pos * 3 + 0] = 0;
av_log(log, AV_LOG_VERBOSE, " %s=<blob size %d: %s>%s\n", name, (int)sz, str, extra);
} else {
av_log(log, AV_LOG_VERBOSE, " %s=<blob size %d>%s\n", name, (int)sz, extra);
}
break;
}
case MF_ATTRIBUTE_IUNKNOWN: {
av_log(log, AV_LOG_VERBOSE, " %s=<IUnknown>%s\n", name, extra);
break;
}
default:
av_log(log, AV_LOG_VERBOSE, " %s=<unknown type>%s\n", name, extra);
break;
}
}
if (IsEqualGUID(&key, &MF_MT_SUBTYPE)) {
const char *fmt;
fmt = av_get_sample_fmt_name(ff_media_type_to_sample_fmt(attrs));
if (fmt)
av_log(log, AV_LOG_VERBOSE, " FF-sample-format=%s\n", fmt);
fmt = av_get_pix_fmt_name(ff_media_type_to_pix_fmt(attrs));
if (fmt)
av_log(log, AV_LOG_VERBOSE, " FF-pixel-format=%s\n", fmt);
}
continue;
err:
av_log(log, AV_LOG_VERBOSE, " %s=<failed to get value>\n", name ? name : "?");
}
}
void ff_media_type_dump(void *log, IMFMediaType *type)
{
ff_attributes_dump(log, (IMFAttributes *)type);
}
const CLSID *ff_codec_to_mf_subtype(enum AVCodecID codec)
{
switch (codec) {
case AV_CODEC_ID_H264: return &MFVideoFormat_H264;
case AV_CODEC_ID_HEVC: return &ff_MFVideoFormat_HEVC;
case AV_CODEC_ID_AC3: return &MFAudioFormat_Dolby_AC3;
case AV_CODEC_ID_AAC: return &MFAudioFormat_AAC;
case AV_CODEC_ID_MP3: return &MFAudioFormat_MP3;
default: return NULL;
}
}
static int init_com_mf(void *log, MFFunctions *f)
{
HRESULT hr;
hr = CoInitializeEx(NULL, COINIT_MULTITHREADED);
if (hr == RPC_E_CHANGED_MODE) {
av_log(log, AV_LOG_ERROR, "COM must not be in STA mode\n");
return AVERROR(EINVAL);
} else if (FAILED(hr)) {
av_log(log, AV_LOG_ERROR, "could not initialize COM\n");
return AVERROR(ENOSYS);
}
hr = f->MFStartup(MF_VERSION, MFSTARTUP_FULL);
if (FAILED(hr)) {
av_log(log, AV_LOG_ERROR, "could not initialize MediaFoundation\n");
CoUninitialize();
return AVERROR(ENOSYS);
}
return 0;
}
static void uninit_com_mf(MFFunctions *f)
{
f->MFShutdown();
CoUninitialize();
}
// Find and create a IMFTransform with the given input/output types. When done,
// you should use ff_free_mf() to destroy it, which will also uninit COM.
int ff_instantiate_mf(void *log,
MFFunctions *f,
GUID category,
MFT_REGISTER_TYPE_INFO *in_type,
MFT_REGISTER_TYPE_INFO *out_type,
int use_hw,
IMFTransform **res)
{
HRESULT hr;
int n;
int ret;
IMFActivate **activate;
UINT32 num_activate;
IMFActivate *winner = 0;
UINT32 flags;
ret = init_com_mf(log, f);
if (ret < 0)
return ret;
flags = MFT_ENUM_FLAG_SORTANDFILTER;
if (use_hw) {
flags |= MFT_ENUM_FLAG_HARDWARE;
} else {
flags |= MFT_ENUM_FLAG_SYNCMFT;
}
hr = f->MFTEnumEx(category, flags, in_type, out_type, &activate,
&num_activate);
if (FAILED(hr))
goto error_uninit_mf;
if (log) {
if (!num_activate)
av_log(log, AV_LOG_ERROR, "could not find any MFT for the given media type\n");
for (n = 0; n < num_activate; n++) {
av_log(log, AV_LOG_VERBOSE, "MF %d attributes:\n", n);
ff_attributes_dump(log, (IMFAttributes *)activate[n]);
}
}
*res = NULL;
for (n = 0; n < num_activate; n++) {
if (log)
av_log(log, AV_LOG_VERBOSE, "activate MFT %d\n", n);
hr = IMFActivate_ActivateObject(activate[n], &IID_IMFTransform,
(void **)res);
if (*res) {
winner = activate[n];
IMFActivate_AddRef(winner);
break;
}
}
for (n = 0; n < num_activate; n++)
IMFActivate_Release(activate[n]);
CoTaskMemFree(activate);
if (!*res) {
if (log)
av_log(log, AV_LOG_ERROR, "could not create MFT\n");
goto error_uninit_mf;
}
if (log) {
wchar_t s[512]; // being lazy here
IMFAttributes *attrs;
hr = IMFTransform_GetAttributes(*res, &attrs);
if (!FAILED(hr) && attrs) {
av_log(log, AV_LOG_VERBOSE, "MFT attributes\n");
ff_attributes_dump(log, attrs);
IMFAttributes_Release(attrs);
}
hr = IMFActivate_GetString(winner, &MFT_FRIENDLY_NAME_Attribute, s,
sizeof(s), NULL);
if (!FAILED(hr))
av_log(log, AV_LOG_INFO, "MFT name: '%ls'\n", s);
}
IMFActivate_Release(winner);
return 0;
error_uninit_mf:
uninit_com_mf(f);
return AVERROR(ENOSYS);
}
void ff_free_mf(MFFunctions *f, IMFTransform **mft)
{
if (*mft)
IMFTransform_Release(*mft);
*mft = NULL;
uninit_com_mf(f);
}
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