avcodec: Add MediaFoundation encoder wrapper

This contains encoder wrappers for H264, HEVC, AAC, AC3 and MP3.

This is based on top of an original patch by wm4
<nfxjfg@googlemail.com>. The original patch supported both encoding
and decoding, but this patch only includes encoding.

The patch contains further changes by Paweł Wegner
<pawel.wegner95@gmail.com> (primarily for splitting out the encoding
parts of the original patch) and further cleanup, build compatibility
fixes and tweaks for use with Qualcomm encoders by Martin Storsjö.
Signed-off-by: Martin Storsjö <martin@martin.st>

Changelog

@@ -69,6 +69,7 @@ version <next>:
 - scdet filter
 - NotchLC decoder
 - gradients source video filter
+- MediaFoundation encoder wrapper
 
 
 version 4.2:

configure

@@ -304,6 +304,7 @@ External library support:
   --enable-mbedtls         enable mbedTLS, needed for https support
                            if openssl, gnutls or libtls is not used [no]
   --enable-mediacodec      enable Android MediaCodec support [no]
+  --enable-mediafoundation enable encoding via MediaFoundation [auto]
   --enable-libmysofa       enable libmysofa, needed for sofalizer filter [no]
   --enable-openal          enable OpenAL 1.1 capture support [no]
   --enable-opencl          enable OpenCL processing [no]
@@ -1704,6 +1705,7 @@ EXTERNAL_AUTODETECT_LIBRARY_LIST="
     libxcb_shape
     libxcb_xfixes
     lzma
+    mediafoundation
     schannel
     sdl2
     securetransport
@@ -3011,6 +3013,8 @@ wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
 wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
 
 # hardware-accelerated codecs
+mediafoundation_deps="mftransform_h MFCreateAlignedMemoryBuffer"
+mediafoundation_extralibs="-lmfplat -lmfuuid -lole32 -lstrmiids"
 omx_deps="libdl pthreads"
 omx_rpi_select="omx"
 qsv_deps="libmfx"
@@ -3035,6 +3039,8 @@ nvenc_deps="ffnvcodec"
 nvenc_deps_any="libdl LoadLibrary"
 nvenc_encoder_deps="nvenc"
 
+aac_mf_encoder_deps="mediafoundation"
+ac3_mf_encoder_deps="mediafoundation"
 h263_v4l2m2m_decoder_deps="v4l2_m2m h263_v4l2_m2m"
 h263_v4l2m2m_encoder_deps="v4l2_m2m h263_v4l2_m2m"
 h264_amf_encoder_deps="amf"
@@ -3043,6 +3049,7 @@ h264_cuvid_decoder_deps="cuvid"
 h264_cuvid_decoder_select="h264_mp4toannexb_bsf"
 h264_mediacodec_decoder_deps="mediacodec"
 h264_mediacodec_decoder_select="h264_mp4toannexb_bsf h264_parser"
+h264_mf_encoder_deps="mediafoundation"
 h264_mmal_decoder_deps="mmal"
 h264_nvenc_encoder_deps="nvenc"
 h264_omx_encoder_deps="omx"
@@ -3059,6 +3066,7 @@ hevc_cuvid_decoder_deps="cuvid"
 hevc_cuvid_decoder_select="hevc_mp4toannexb_bsf"
 hevc_mediacodec_decoder_deps="mediacodec"
 hevc_mediacodec_decoder_select="hevc_mp4toannexb_bsf hevc_parser"
+hevc_mf_encoder_deps="mediafoundation"
 hevc_nvenc_encoder_deps="nvenc"
 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf qsvdec"
 hevc_qsv_encoder_select="hevcparse qsvenc"
@@ -3075,6 +3083,7 @@ mjpeg_qsv_encoder_deps="libmfx"
 mjpeg_qsv_encoder_select="qsvenc"
 mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
 mjpeg_vaapi_encoder_select="cbs_jpeg jpegtables vaapi_encode"
+mp3_mf_encoder_deps="mediafoundation"
 mpeg1_cuvid_decoder_deps="cuvid"
 mpeg1_v4l2m2m_decoder_deps="v4l2_m2m mpeg1_v4l2_m2m"
 mpeg2_crystalhd_decoder_select="crystalhd"
@@ -6101,6 +6110,7 @@ check_headers io.h
 check_headers linux/perf_event.h
 check_headers libcrystalhd/libcrystalhd_if.h
 check_headers malloc.h
+check_headers mftransform.h
 check_headers net/udplite.h
 check_headers poll.h
 check_headers sys/param.h
@@ -6163,6 +6173,7 @@ check_type "windows.h dxva.h" "DXVA_PicParams_VP9" -DWINAPI_FAMILY=WINAPI_FAMILY
 check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
 check_type "windows.h d3d11.h" "ID3D11VideoContext"
 check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
+check_func_headers mfapi.h MFCreateAlignedMemoryBuffer -lmfplat
 
 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
 check_type "vdpau/vdpau.h" "VdpPictureInfoVP9"

doc/encoders.texi

@@ -2725,6 +2725,14 @@ fastest.
 
 @end table
 
+@section MediaFoundation
+
+This provides wrappers to encoders (both audio and video) in the
+MediaFoundation framework. It can access both SW and HW encoders.
+Video encoders can take input in either of nv12 or yuv420p form
+(some encoders support both, some support only either - in practice,
+nv12 is the safer choice, especially among HW encoders).
+
 @section mpeg2
 
 MPEG-2 video encoder.

libavcodec/Makefile

@@ -170,12 +170,14 @@ OBJS-$(CONFIG_AAC_ENCODER)             += aacenc.o aaccoder.o aacenctab.o    \
                                           aacenc_ltp.o \
                                           aacenc_pred.o \
                                           psymodel.o mpeg4audio.o kbdwin.o cbrt_data.o
+OBJS-$(CONFIG_AAC_MF_ENCODER)          += mfenc.o mf_utils.o
 OBJS-$(CONFIG_AASC_DECODER)            += aasc.o msrledec.o
 OBJS-$(CONFIG_AC3_DECODER)             += ac3dec_float.o ac3dec_data.o ac3.o kbdwin.o ac3tab.o
 OBJS-$(CONFIG_AC3_FIXED_DECODER)       += ac3dec_fixed.o ac3dec_data.o ac3.o kbdwin.o ac3tab.o
 OBJS-$(CONFIG_AC3_ENCODER)             += ac3enc_float.o ac3enc.o ac3tab.o \
                                           ac3.o kbdwin.o
 OBJS-$(CONFIG_AC3_FIXED_ENCODER)       += ac3enc_fixed.o ac3enc.o ac3tab.o ac3.o
+OBJS-$(CONFIG_AC3_MF_ENCODER)          += mfenc.o mf_utils.o
 OBJS-$(CONFIG_ACELP_KELVIN_DECODER)    += g729dec.o lsp.o celp_math.o celp_filters.o acelp_filters.o acelp_pitch_delay.o acelp_vectors.o g729postfilter.o
 OBJS-$(CONFIG_AGM_DECODER)             += agm.o
 OBJS-$(CONFIG_AIC_DECODER)             += aic.o
@@ -356,6 +358,7 @@ OBJS-$(CONFIG_H264_DECODER)            += h264dec.o h264_cabac.o h264_cavlc.o \
 OBJS-$(CONFIG_H264_AMF_ENCODER)        += amfenc_h264.o
 OBJS-$(CONFIG_H264_CUVID_DECODER)      += cuviddec.o
 OBJS-$(CONFIG_H264_MEDIACODEC_DECODER) += mediacodecdec.o
+OBJS-$(CONFIG_H264_MF_ENCODER)         += mfenc.o mf_utils.o
 OBJS-$(CONFIG_H264_MMAL_DECODER)       += mmaldec.o
 OBJS-$(CONFIG_H264_NVENC_ENCODER)      += nvenc_h264.o
 OBJS-$(CONFIG_NVENC_ENCODER)           += nvenc_h264.o
@@ -378,6 +381,7 @@ OBJS-$(CONFIG_HEVC_DECODER)            += hevcdec.o hevc_mvs.o \
 OBJS-$(CONFIG_HEVC_AMF_ENCODER)        += amfenc_hevc.o
 OBJS-$(CONFIG_HEVC_CUVID_DECODER)      += cuviddec.o
 OBJS-$(CONFIG_HEVC_MEDIACODEC_DECODER) += mediacodecdec.o
+OBJS-$(CONFIG_HEVC_MF_ENCODER)         += mfenc.o mf_utils.o
 OBJS-$(CONFIG_HEVC_NVENC_ENCODER)      += nvenc_hevc.o
 OBJS-$(CONFIG_NVENC_HEVC_ENCODER)      += nvenc_hevc.o
 OBJS-$(CONFIG_HEVC_QSV_DECODER)        += qsvdec_h2645.o
@@ -455,6 +459,7 @@ OBJS-$(CONFIG_MP2FIXED_ENCODER)        += mpegaudioenc_fixed.o mpegaudio.o \
                                           mpegaudiodata.o mpegaudiodsp_data.o
 OBJS-$(CONFIG_MP2FLOAT_DECODER)        += mpegaudiodec_float.o
 OBJS-$(CONFIG_MP3_DECODER)             += mpegaudiodec_fixed.o
+OBJS-$(CONFIG_MP3_MF_ENCODER)          += mfenc.o mf_utils.o
 OBJS-$(CONFIG_MP3ADU_DECODER)          += mpegaudiodec_fixed.o
 OBJS-$(CONFIG_MP3ADUFLOAT_DECODER)     += mpegaudiodec_float.o
 OBJS-$(CONFIG_MP3FLOAT_DECODER)        += mpegaudiodec_float.o
@@ -1156,6 +1161,7 @@ SKIPHEADERS-$(CONFIG_JNI)              += ffjni.h
 SKIPHEADERS-$(CONFIG_LIBVPX)           += libvpx.h
 SKIPHEADERS-$(CONFIG_LIBWEBP_ENCODER)  += libwebpenc_common.h
 SKIPHEADERS-$(CONFIG_MEDIACODEC)       += mediacodecdec_common.h mediacodec_surface.h mediacodec_wrapper.h mediacodec_sw_buffer.h
+SKIPHEADERS-$(CONFIG_MEDIAFOUNDATION)  += mf_utils.h
 SKIPHEADERS-$(CONFIG_NVDEC)            += nvdec.h
 SKIPHEADERS-$(CONFIG_NVENC)            += nvenc.h
 SKIPHEADERS-$(CONFIG_QSV)              += qsv.h qsv_internal.h

libavcodec/allcodecs.c

@@ -677,7 +677,9 @@ extern AVCodec ff_xsub_decoder;
 /* external libraries */
 extern AVCodec ff_aac_at_encoder;
 extern AVCodec ff_aac_at_decoder;
+extern AVCodec ff_aac_mf_encoder;
 extern AVCodec ff_ac3_at_decoder;
+extern AVCodec ff_ac3_mf_encoder;
 extern AVCodec ff_adpcm_ima_qt_at_decoder;
 extern AVCodec ff_alac_at_encoder;
 extern AVCodec ff_alac_at_decoder;
@@ -689,6 +691,7 @@ extern AVCodec ff_ilbc_at_decoder;
 extern AVCodec ff_mp1_at_decoder;
 extern AVCodec ff_mp2_at_decoder;
 extern AVCodec ff_mp3_at_decoder;
+extern AVCodec ff_mp3_mf_encoder;
 extern AVCodec ff_pcm_alaw_at_encoder;
 extern AVCodec ff_pcm_alaw_at_decoder;
 extern AVCodec ff_pcm_mulaw_at_encoder;
@@ -758,6 +761,7 @@ extern AVCodec ff_libopenh264_encoder;
 extern AVCodec ff_libopenh264_decoder;
 extern AVCodec ff_h264_amf_encoder;
 extern AVCodec ff_h264_cuvid_decoder;
+extern AVCodec ff_h264_mf_encoder;
 extern AVCodec ff_h264_nvenc_encoder;
 extern AVCodec ff_h264_omx_encoder;
 extern AVCodec ff_h264_qsv_encoder;
@@ -772,6 +776,7 @@ extern AVCodec ff_nvenc_hevc_encoder;
 extern AVCodec ff_hevc_amf_encoder;
 extern AVCodec ff_hevc_cuvid_decoder;
 extern AVCodec ff_hevc_mediacodec_decoder;
+extern AVCodec ff_hevc_mf_encoder;
 extern AVCodec ff_hevc_nvenc_encoder;
 extern AVCodec ff_hevc_qsv_encoder;
 extern AVCodec ff_hevc_v4l2m2m_encoder;

libavcodec/mf_utils.c

+/*
+ * 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
+
+// MFTEnumEx was missing from mingw-w64's mfplat import library until
+// mingw-w64 v6.0.0, thus wrap it and load it using GetProcAddress.
+// It's also missing in Windows Vista's mfplat.dll.
+HRESULT ff_MFTEnumEx(GUID guidCategory, UINT32 Flags,
+                     const MFT_REGISTER_TYPE_INFO *pInputType,
+                     const MFT_REGISTER_TYPE_INFO *pOutputType,
+                     IMFActivate ***pppMFTActivate, UINT32 *pnumMFTActivate)
+{
+    HRESULT (WINAPI *MFTEnumEx_ptr)(GUID guidCategory, UINT32 Flags,
+                                    const MFT_REGISTER_TYPE_INFO *pInputType,
+                                    const MFT_REGISTER_TYPE_INFO *pOutputType,
+                                    IMFActivate ***pppMFTActivate,
+                                    UINT32 *pnumMFTActivate) = NULL;
+#if !HAVE_UWP
+    HANDLE lib = GetModuleHandleW(L"mfplat.dll");
+    if (lib)
+        MFTEnumEx_ptr = (void *)GetProcAddress(lib, "MFTEnumEx");
+#else
+    // In UWP (which lacks GetModuleHandle), just link directly against
+    // the functions - this requires building with new/complete enough
+    // import libraries.
+    MFTEnumEx_ptr = MFTEnumEx;
+#endif
+    if (!MFTEnumEx_ptr)
+        return E_FAIL;
+    return MFTEnumEx_ptr(guidCategory,
+                         Flags,
+                         pInputType,
+                         pOutputType,
+                         pppMFTActivate,
+                         pnumMFTActivate);
+}
+
+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(void *fill_data, size_t size, size_t align)
+{
+    HRESULT hr;
+    IMFSample *sample;
+    IMFMediaBuffer *buffer;
+
+    hr = MFCreateSample(&sample);
+    if (FAILED(hr))
+        return NULL;
+
+    align = FFMAX(align, 16); // 16 is "recommended", even if not required
+
+    hr = 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)
+{
+    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 = 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(void)
+{
+    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,
+                      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);
+    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 = ff_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();
+    return AVERROR(ENOSYS);
+}
+
+void ff_free_mf(IMFTransform **mft)
+{
+    if (*mft)
+        IMFTransform_Release(*mft);
+    *mft = NULL;
+    uninit_com_mf();
+}

libavcodec/mf_utils.h

+/*
+ * 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
+ */
+
+#ifndef AVCODEC_MF_UTILS_H
+#define AVCODEC_MF_UTILS_H
+
+#include <windows.h>
+#include <initguid.h>
+#ifdef _MSC_VER
+// The official way of including codecapi (via dshow.h) makes the ICodecAPI
+// interface unavailable in UWP mode, but including icodecapi.h + codecapi.h
+// seems to be equivalent. (These headers conflict with the official way
+// of including it though, through strmif.h via dshow.h. And on mingw, the
+// mf*.h headers below indirectly include strmif.h.)
+#include <icodecapi.h>
+#else
+#include <dshow.h>
+#endif
+// Older versions of mingw-w64 need codecapi.h explicitly included, while newer
+// ones include it implicitly from dshow.h (via uuids.h).
+#include <codecapi.h>
+#include <mfapi.h>
+#include <mferror.h>
+#include <mfobjects.h>
+#include <mftransform.h>
+
+#include "avcodec.h"
+
+// These functions do exist in mfapi.h, but are only available within
+// __cplusplus ifdefs.
+HRESULT ff_MFGetAttributeSize(IMFAttributes *pattr, REFGUID guid,
+                              UINT32 *pw, UINT32 *ph);
+HRESULT ff_MFSetAttributeSize(IMFAttributes *pattr, REFGUID guid,
+                              UINT32 uw, UINT32 uh);
+#define ff_MFSetAttributeRatio ff_MFSetAttributeSize
+#define ff_MFGetAttributeRatio ff_MFGetAttributeSize
+
+// MFTEnumEx was missing from mingw-w64's mfplat import library until
+// mingw-w64 v6.0.0, thus wrap it and load it using GetProcAddress.
+// It's also missing in Windows Vista's mfplat.dll.
+HRESULT ff_MFTEnumEx(GUID guidCategory, UINT32 Flags,
+                     const MFT_REGISTER_TYPE_INFO *pInputType,
+                     const MFT_REGISTER_TYPE_INFO *pOutputType,
+                     IMFActivate ***pppMFTActivate, UINT32 *pnumMFTActivate);
+
+
+// These do exist in mingw-w64's codecapi.h, but they aren't properly defined
+// by the header until after mingw-w64 v7.0.0.
+DEFINE_GUID(ff_CODECAPI_AVDecVideoThumbnailGenerationMode, 0x2efd8eee,0x1150,0x4328,0x9c,0xf5,0x66,0xdc,0xe9,0x33,0xfc,0xf4);
+DEFINE_GUID(ff_CODECAPI_AVDecVideoDropPicWithMissingRef, 0xf8226383,0x14c2,0x4567,0x97,0x34,0x50,0x04,0xe9,0x6f,0xf8,0x87);
+DEFINE_GUID(ff_CODECAPI_AVDecVideoSoftwareDeinterlaceMode, 0x0c08d1ce,0x9ced,0x4540,0xba,0xe3,0xce,0xb3,0x80,0x14,0x11,0x09);
+DEFINE_GUID(ff_CODECAPI_AVDecVideoFastDecodeMode, 0x6b529f7d,0xd3b1,0x49c6,0xa9,0x99,0x9e,0xc6,0x91,0x1b,0xed,0xbf);
+DEFINE_GUID(ff_CODECAPI_AVLowLatencyMode, 0x9c27891a,0xed7a,0x40e1,0x88,0xe8,0xb2,0x27,0x27,0xa0,0x24,0xee);
+DEFINE_GUID(ff_CODECAPI_AVDecVideoH264ErrorConcealment, 0xececace8,0x3436,0x462c,0x92,0x94,0xcd,0x7b,0xac,0xd7,0x58,0xa9);
+DEFINE_GUID(ff_CODECAPI_AVDecVideoMPEG2ErrorConcealment, 0x9d2bfe18,0x728d,0x48d2,0xb3,0x58,0xbc,0x7e,0x43,0x6c,0x66,0x74);
+DEFINE_GUID(ff_CODECAPI_AVDecVideoCodecType, 0x434528e5,0x21f0,0x46b6,0xb6,0x2c,0x9b,0x1b,0x6b,0x65,0x8c,0xd1);
+DEFINE_GUID(ff_CODECAPI_AVDecVideoDXVAMode, 0xf758f09e,0x7337,0x4ae7,0x83,0x87,0x73,0xdc,0x2d,0x54,0xe6,0x7d);
+DEFINE_GUID(ff_CODECAPI_AVDecVideoDXVABusEncryption, 0x42153c8b,0xfd0b,0x4765,0xa4,0x62,0xdd,0xd9,0xe8,0xbc,0xc3,0x88);
+DEFINE_GUID(ff_CODECAPI_AVDecVideoSWPowerLevel, 0xfb5d2347,0x4dd8,0x4509,0xae,0xd0,0xdb,0x5f,0xa9,0xaa,0x93,0xf4);
+DEFINE_GUID(ff_CODECAPI_AVDecVideoMaxCodedWidth, 0x5ae557b8,0x77af,0x41f5,0x9f,0xa6,0x4d,0xb2,0xfe,0x1d,0x4b,0xca);
+DEFINE_GUID(ff_CODECAPI_AVDecVideoMaxCodedHeight, 0x7262a16a,0xd2dc,0x4e75,0x9b,0xa8,0x65,0xc0,0xc6,0xd3,0x2b,0x13);
+DEFINE_GUID(ff_CODECAPI_AVDecNumWorkerThreads, 0x9561c3e8,0xea9e,0x4435,0x9b,0x1e,0xa9,0x3e,0x69,0x18,0x94,0xd8);
+DEFINE_GUID(ff_CODECAPI_AVDecSoftwareDynamicFormatChange, 0x862e2f0a,0x507b,0x47ff,0xaf,0x47,0x01,0xe2,0x62,0x42,0x98,0xb7);
+DEFINE_GUID(ff_CODECAPI_AVDecDisableVideoPostProcessing, 0xf8749193,0x667a,0x4f2c,0xa9,0xe8,0x5d,0x4a,0xf9,0x24,0xf0,0x8f);
+
+// These are missing from mingw-w64's headers until after mingw-w64 v7.0.0.
+DEFINE_GUID(ff_CODECAPI_AVEncCommonRateControlMode,      0x1c0608e9, 0x370c, 0x4710, 0x8a, 0x58, 0xcb, 0x61, 0x81, 0xc4, 0x24, 0x23);
+DEFINE_GUID(ff_CODECAPI_AVEncCommonQuality,       0xfcbf57a3, 0x7ea5, 0x4b0c, 0x96, 0x44, 0x69, 0xb4, 0x0c, 0x39, 0xc3, 0x91);
+DEFINE_GUID(ff_CODECAPI_AVEncCommonMeanBitRate,   0xf7222374, 0x2144, 0x4815, 0xb5, 0x50, 0xa3, 0x7f, 0x8e, 0x12, 0xee, 0x52);
+DEFINE_GUID(ff_CODECAPI_AVEncH264CABACEnable,    0xee6cad62, 0xd305, 0x4248, 0xa5, 0xe, 0xe1, 0xb2, 0x55, 0xf7, 0xca, 0xf8);
+DEFINE_GUID(ff_CODECAPI_AVEncVideoForceKeyFrame, 0x398c1b98, 0x8353, 0x475a, 0x9e, 0xf2, 0x8f, 0x26, 0x5d, 0x26, 0x3, 0x45);
+DEFINE_GUID(ff_CODECAPI_AVEncMPVDefaultBPictureCount, 0x8d390aac, 0xdc5c, 0x4200, 0xb5, 0x7f, 0x81, 0x4d, 0x04, 0xba, 0xba, 0xb2);
+DEFINE_GUID(ff_CODECAPI_AVScenarioInfo, 0xb28a6e64,0x3ff9,0x446a,0x8a,0x4b,0x0d,0x7a,0x53,0x41,0x32,0x36);
+
+DEFINE_GUID(ff_MF_SA_D3D11_BINDFLAGS, 0xeacf97ad, 0x065c, 0x4408, 0xbe, 0xe3, 0xfd, 0xcb, 0xfd, 0x12, 0x8b, 0xe2);
+DEFINE_GUID(ff_MF_SA_D3D11_USAGE, 0xe85fe442, 0x2ca3, 0x486e, 0xa9, 0xc7, 0x10, 0x9d, 0xda, 0x60, 0x98, 0x80);
+DEFINE_GUID(ff_MF_SA_D3D11_AWARE, 0x206b4fc8, 0xfcf9, 0x4c51, 0xaf, 0xe3, 0x97, 0x64, 0x36, 0x9e, 0x33, 0xa0);
+DEFINE_GUID(ff_MF_SA_D3D11_SHARED, 0x7b8f32c3, 0x6d96, 0x4b89, 0x92, 0x3, 0xdd, 0x38, 0xb6, 0x14, 0x14, 0xf3);
+DEFINE_GUID(ff_MF_SA_D3D11_SHARED_WITHOUT_MUTEX, 0x39dbd44d, 0x2e44, 0x4931, 0xa4, 0xc8, 0x35, 0x2d, 0x3d, 0xc4, 0x21, 0x15);
+DEFINE_GUID(ff_MF_SA_MINIMUM_OUTPUT_SAMPLE_COUNT, 0x851745d5, 0xc3d6, 0x476d, 0x95, 0x27, 0x49, 0x8e, 0xf2, 0xd1, 0xd, 0x18);
+DEFINE_GUID(ff_MF_SA_MINIMUM_OUTPUT_SAMPLE_COUNT_PROGRESSIVE, 0xf5523a5, 0x1cb2, 0x47c5, 0xa5, 0x50, 0x2e, 0xeb, 0x84, 0xb4, 0xd1, 0x4a);
+
+DEFINE_MEDIATYPE_GUID(ff_MFVideoFormat_HEVC, 0x43564548); // FCC('HEVC')
+DEFINE_MEDIATYPE_GUID(ff_MFVideoFormat_HEVC_ES, 0x53564548); // FCC('HEVS')
+
+
+// This enum is missing from mingw-w64's codecapi.h by v7.0.0.
+enum ff_eAVEncCommonRateControlMode {
+    ff_eAVEncCommonRateControlMode_CBR                 = 0,
+    ff_eAVEncCommonRateControlMode_PeakConstrainedVBR  = 1,
+    ff_eAVEncCommonRateControlMode_UnconstrainedVBR    = 2,
+    ff_eAVEncCommonRateControlMode_Quality             = 3,
+    ff_eAVEncCommonRateControlMode_LowDelayVBR         = 4,
+    ff_eAVEncCommonRateControlMode_GlobalVBR           = 5,
+    ff_eAVEncCommonRateControlMode_GlobalLowDelayVBR   = 6
+};
+
+enum ff_eAVScenarioInfo {
+    ff_eAVScenarioInfo_Unknown                         = 0,
+    ff_eAVScenarioInfo_DisplayRemoting                 = 1,
+    ff_eAVScenarioInfo_VideoConference                 = 2,
+    ff_eAVScenarioInfo_Archive                         = 3,
+    ff_eAVScenarioInfo_LiveStreaming                   = 4,
+    ff_eAVScenarioInfo_CameraRecord                    = 5,
+    ff_eAVScenarioInfo_DisplayRemotingWithFeatureMap   = 6
+};
+
+// These do exist in mingw-w64's mfobjects.idl, but are missing from
+// mfobjects.h that is generated from the former, due to incorrect use of
+// ifdefs in the IDL file.
+enum {
+    ff_METransformUnknown = 600,
+    ff_METransformNeedInput,
+    ff_METransformHaveOutput,
+    ff_METransformDrainComplete,
+    ff_METransformMarker,
+};
+
+char *ff_hr_str_buf(char *buf, size_t size, HRESULT hr);
+#define ff_hr_str(hr) ff_hr_str_buf((char[80]){0}, 80, hr)
+
+// Possibly compiler-dependent; the MS/MinGW definition for this is just crazy.
+#define FF_VARIANT_VALUE(type, contents) &(VARIANT){ .vt = (type), contents }
+
+#define FF_VAL_VT_UI4(v) FF_VARIANT_VALUE(VT_UI4, .ulVal = (v))
+#define FF_VAL_VT_BOOL(v) FF_VARIANT_VALUE(VT_BOOL, .boolVal = (v))
+
+IMFSample *ff_create_memory_sample(void *fill_data, size_t size, size_t align);
+enum AVSampleFormat ff_media_type_to_sample_fmt(IMFAttributes *type);
+enum AVPixelFormat ff_media_type_to_pix_fmt(IMFAttributes *type);
+const GUID *ff_pix_fmt_to_guid(enum AVPixelFormat pix_fmt);
+int ff_fourcc_from_guid(const GUID *guid, uint32_t *out_fourcc);
+char *ff_guid_str_buf(char *buf, size_t buf_size, const GUID *guid);
+#define ff_guid_str(guid) ff_guid_str_buf((char[80]){0}, 80, guid)
+void ff_attributes_dump(void *log, IMFAttributes *attrs);
+void ff_media_type_dump(void *log, IMFMediaType *type);
+const CLSID *ff_codec_to_mf_subtype(enum AVCodecID codec);
+int ff_instantiate_mf(void *log, GUID category,
+                      MFT_REGISTER_TYPE_INFO *in_type,
+                      MFT_REGISTER_TYPE_INFO *out_type,
+                      int use_hw, IMFTransform **res);
+void ff_free_mf(IMFTransform **mft);
+
+#endif

libavcodec/mfenc.c

+/*
+ * 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/imgutils.h"
+#include "libavutil/opt.h"
+#include "libavutil/time.h"
+
+// Include after mf_utils.h due to Windows include mess.
+#include "mpeg4audio.h"
+
+typedef struct MFContext {
+    AVClass *av_class;
+    int is_video, is_audio;
+    GUID main_subtype;
+    IMFTransform *mft;
+    IMFMediaEventGenerator *async_events;
+    DWORD in_stream_id, out_stream_id;
+    MFT_INPUT_STREAM_INFO in_info;
+    MFT_OUTPUT_STREAM_INFO out_info;
+    int out_stream_provides_samples;
+    int draining, draining_done;
+    int sample_sent;
+    int async_need_input, async_have_output, async_marker;
+    int64_t reorder_delay;
+    ICodecAPI *codec_api;
+    // set by AVOption
+    int opt_enc_rc;
+    int opt_enc_quality;
+    int opt_enc_scenario;
+    int opt_enc_hw;
+} MFContext;
+
+static int mf_choose_output_type(AVCodecContext *avctx);
+static int mf_setup_context(AVCodecContext *avctx);
+
+#define MF_TIMEBASE (AVRational){1, 10000000}
+// Sentinel value only used by us.
+#define MF_INVALID_TIME AV_NOPTS_VALUE
+
+static int mf_wait_events(AVCodecContext *avctx)
+{
+    MFContext *c = avctx->priv_data;
+
+    if (!c->async_events)
+        return 0;
+
+    while (!(c->async_need_input || c->async_have_output || c->draining_done || c->async_marker)) {
+        IMFMediaEvent *ev = NULL;
+        MediaEventType ev_id = 0;
+        HRESULT hr = IMFMediaEventGenerator_GetEvent(c->async_events, 0, &ev);
+        if (FAILED(hr)) {
+            av_log(avctx, AV_LOG_ERROR, "IMFMediaEventGenerator_GetEvent() failed: %s\n",
+                   ff_hr_str(hr));
+            return AVERROR_EXTERNAL;
+        }
+        IMFMediaEvent_GetType(ev, &ev_id);
+        switch (ev_id) {
+        case ff_METransformNeedInput:
+            if (!c->draining)
+                c->async_need_input = 1;
+            break;
+        case ff_METransformHaveOutput:
+            c->async_have_output = 1;
+            break;
+        case ff_METransformDrainComplete:
+            c->draining_done = 1;
+            break;
+        case ff_METransformMarker:
+            c->async_marker = 1;
+            break;
+        default: ;
+        }
+        IMFMediaEvent_Release(ev);
+    }
+
+    return 0;
+}
+
+static AVRational mf_get_tb(AVCodecContext *avctx)
+{
+    if (avctx->pkt_timebase.num > 0 && avctx->pkt_timebase.den > 0)
+        return avctx->pkt_timebase;
+    if (avctx->time_base.num > 0 && avctx->time_base.den > 0)
+        return avctx->time_base;
+    return MF_TIMEBASE;
+}
+
+static LONGLONG mf_to_mf_time(AVCodecContext *avctx, int64_t av_pts)
+{
+    if (av_pts == AV_NOPTS_VALUE)
+        return MF_INVALID_TIME;
+    return av_rescale_q(av_pts, mf_get_tb(avctx), MF_TIMEBASE);
+}
+
+static void mf_sample_set_pts(AVCodecContext *avctx, IMFSample *sample, int64_t av_pts)
+{
+    LONGLONG stime = mf_to_mf_time(avctx, av_pts);
+    if (stime != MF_INVALID_TIME)
+        IMFSample_SetSampleTime(sample, stime);
+}
+
+static int64_t mf_from_mf_time(AVCodecContext *avctx, LONGLONG stime)
+{
+    return av_rescale_q(stime, MF_TIMEBASE, mf_get_tb(avctx));
+}
+
+static int64_t mf_sample_get_pts(AVCodecContext *avctx, IMFSample *sample)
+{
+    LONGLONG pts;
+    HRESULT hr = IMFSample_GetSampleTime(sample, &pts);
+    if (FAILED(hr))
+        return AV_NOPTS_VALUE;
+    return mf_from_mf_time(avctx, pts);
+}
+
+static int mf_enca_output_type_get(AVCodecContext *avctx, IMFMediaType *type)
+{
+    MFContext *c = avctx->priv_data;
+    HRESULT hr;
+    UINT32 sz;
+
+    if (avctx->codec_id != AV_CODEC_ID_MP3 && avctx->codec_id != AV_CODEC_ID_AC3) {
+        hr = IMFAttributes_GetBlobSize(type, &MF_MT_USER_DATA, &sz);
+        if (!FAILED(hr) && sz > 0) {
+            avctx->extradata = av_mallocz(sz + AV_INPUT_BUFFER_PADDING_SIZE);
+            if (!avctx->extradata)
+                return AVERROR(ENOMEM);
+            avctx->extradata_size = sz;
+            hr = IMFAttributes_GetBlob(type, &MF_MT_USER_DATA, avctx->extradata, sz, NULL);
+            if (FAILED(hr))
+                return AVERROR_EXTERNAL;
+
+            if (avctx->codec_id == AV_CODEC_ID_AAC && avctx->extradata_size >= 12) {
+                // Get rid of HEAACWAVEINFO (after wfx field, 12 bytes).
+                avctx->extradata_size = avctx->extradata_size - 12;
+                memmove(avctx->extradata, avctx->extradata + 12, avctx->extradata_size);
+            }
+        }
+    }
+
+    // I don't know where it's documented that we need this. It happens with the
+    // MS mp3 encoder MFT. The idea for the workaround is taken from NAudio.
+    // (Certainly any lossy codec will have frames much smaller than 1 second.)
+    if (!c->out_info.cbSize && !c->out_stream_provides_samples) {
+        hr = IMFAttributes_GetUINT32(type, &MF_MT_AUDIO_AVG_BYTES_PER_SECOND, &sz);
+        if (!FAILED(hr)) {
+            av_log(avctx, AV_LOG_VERBOSE, "MFT_OUTPUT_STREAM_INFO.cbSize set to 0, "
+                   "assuming %d bytes instead.\n", (int)sz);
+            c->out_info.cbSize = sz;
+        }
+    }
+
+    return 0;
+}
+
+static int mf_encv_output_type_get(AVCodecContext *avctx, IMFMediaType *type)
+{
+    HRESULT hr;
+    UINT32 sz;
+
+    hr = IMFAttributes_GetBlobSize(type, &MF_MT_MPEG_SEQUENCE_HEADER, &sz);
+    if (!FAILED(hr) && sz > 0) {
+        uint8_t *extradata = av_mallocz(sz + AV_INPUT_BUFFER_PADDING_SIZE);
+        if (!extradata)
+            return AVERROR(ENOMEM);
+        hr = IMFAttributes_GetBlob(type, &MF_MT_MPEG_SEQUENCE_HEADER, extradata, sz, NULL);
+        if (FAILED(hr)) {
+            av_free(extradata);
+            return AVERROR_EXTERNAL;
+        }
+        av_freep(&avctx->extradata);
+        avctx->extradata = extradata;
+        avctx->extradata_size = sz;
+    }
+
+    return 0;
+}
+
+static int mf_output_type_get(AVCodecContext *avctx)
+{
+    MFContext *c = avctx->priv_data;
+    HRESULT hr;
+    IMFMediaType *type;
+    int ret;
+
+    hr = IMFTransform_GetOutputCurrentType(c->mft, c->out_stream_id, &type);
+    if (FAILED(hr)) {
+        av_log(avctx, AV_LOG_ERROR, "could not get output type\n");
+        return AVERROR_EXTERNAL;
+    }
+
+    av_log(avctx, AV_LOG_VERBOSE, "final output type:\n");
+    ff_media_type_dump(avctx, type);
+
+    ret = 0;
+    if (c->is_video) {
+        ret = mf_encv_output_type_get(avctx, type);
+    } else if (c->is_audio) {
+        ret = mf_enca_output_type_get(avctx, type);
+    }
+
+    if (ret < 0)
+        av_log(avctx, AV_LOG_ERROR, "output type not supported\n");
+
+    IMFMediaType_Release(type);
+    return ret;
+}
+
+static int mf_sample_to_avpacket(AVCodecContext *avctx, IMFSample *sample, AVPacket *avpkt)
+{
+    MFContext *c = avctx->priv_data;
+    HRESULT hr;
+    int ret;
+    DWORD len;
+    IMFMediaBuffer *buffer;
+    BYTE *data;
+    UINT64 t;
+    UINT32 t32;
+
+    hr = IMFSample_GetTotalLength(sample, &len);
+    if (FAILED(hr))
+        return AVERROR_EXTERNAL;
+
+    if ((ret = av_new_packet(avpkt, len)) < 0)
+        return ret;
+
+    IMFSample_ConvertToContiguousBuffer(sample, &buffer);
+    if (FAILED(hr))
+        return AVERROR_EXTERNAL;
+
+    hr = IMFMediaBuffer_Lock(buffer, &data, NULL, NULL);
+    if (FAILED(hr)) {
+        IMFMediaBuffer_Release(buffer);
+        return AVERROR_EXTERNAL;
+    }
+
+    memcpy(avpkt->data, data, len);
+
+    IMFMediaBuffer_Unlock(buffer);
+    IMFMediaBuffer_Release(buffer);
+
+    avpkt->pts = avpkt->dts = mf_sample_get_pts(avctx, sample);
+
+    hr = IMFAttributes_GetUINT32(sample, &MFSampleExtension_CleanPoint, &t32);
+    if (c->is_audio || (!FAILED(hr) && t32 != 0))
+        avpkt->flags |= AV_PKT_FLAG_KEY;
+
+    hr = IMFAttributes_GetUINT64(sample, &MFSampleExtension_DecodeTimestamp, &t);
+    if (!FAILED(hr)) {
+        avpkt->dts = mf_from_mf_time(avctx, t);
+        // At least on Qualcomm's HEVC encoder on SD 835, the output dts
+        // starts from the input pts of the first frame, while the output pts
+        // is shifted forward. Therefore, shift the output values back so that
+        // the output pts matches the input.
+        if (c->reorder_delay == AV_NOPTS_VALUE)
+            c->reorder_delay = avpkt->pts - avpkt->dts;
+        avpkt->dts -= c->reorder_delay;
+        avpkt->pts -= c->reorder_delay;
+    }
+
+    return 0;
+}
+
+static IMFSample *mf_a_avframe_to_sample(AVCodecContext *avctx, const AVFrame *frame)
+{
+    MFContext *c = avctx->priv_data;
+    size_t len;
+    size_t bps;
+    IMFSample *sample;
+
+    bps = av_get_bytes_per_sample(avctx->sample_fmt) * avctx->channels;
+    len = frame->nb_samples * bps;
+
+    sample = ff_create_memory_sample(frame->data[0], len, c->in_info.cbAlignment);
+    if (sample)
+        IMFSample_SetSampleDuration(sample, mf_to_mf_time(avctx, frame->nb_samples));
+    return sample;
+}
+
+static IMFSample *mf_v_avframe_to_sample(AVCodecContext *avctx, const AVFrame *frame)
+{
+    MFContext *c = avctx->priv_data;
+    IMFSample *sample;
+    IMFMediaBuffer *buffer;
+    BYTE *data;
+    HRESULT hr;
+    int ret;
+    int size;
+
+    size = av_image_get_buffer_size(avctx->pix_fmt, avctx->width, avctx->height, 1);
+    if (size < 0)
+        return NULL;
+
+    sample = ff_create_memory_sample(NULL, size, c->in_info.cbAlignment);
+    if (!sample)
+        return NULL;
+
+    hr = IMFSample_GetBufferByIndex(sample, 0, &buffer);
+    if (FAILED(hr)) {
+        IMFSample_Release(sample);
+        return NULL;
+    }
+
+    hr = IMFMediaBuffer_Lock(buffer, &data, NULL, NULL);
+    if (FAILED(hr)) {
+        IMFMediaBuffer_Release(buffer);
+        IMFSample_Release(sample);
+        return NULL;
+    }
+
+    ret = av_image_copy_to_buffer((uint8_t *)data, size, (void *)frame->data, frame->linesize,
+                                  avctx->pix_fmt, avctx->width, avctx->height, 1);
+    IMFMediaBuffer_SetCurrentLength(buffer, size);
+    IMFMediaBuffer_Unlock(buffer);
+    IMFMediaBuffer_Release(buffer);
+    if (ret < 0) {
+        IMFSample_Release(sample);
+        return NULL;
+    }
+
+    IMFSample_SetSampleDuration(sample, mf_to_mf_time(avctx, frame->pkt_duration));
+
+    return sample;
+}
+
+static IMFSample *mf_avframe_to_sample(AVCodecContext *avctx, const AVFrame *frame)
+{
+    MFContext *c = avctx->priv_data;
+    IMFSample *sample;
+
+    if (c->is_audio) {
+        sample = mf_a_avframe_to_sample(avctx, frame);
+    } else {
+        sample = mf_v_avframe_to_sample(avctx, frame);
+    }
+
+    if (sample)
+        mf_sample_set_pts(avctx, sample, frame->pts);
+
+    return sample;
+}
+
+static int mf_send_sample(AVCodecContext *avctx, IMFSample *sample)
+{
+    MFContext *c = avctx->priv_data;
+    HRESULT hr;
+    int ret;
+
+    if (sample) {
+        if (c->async_events) {
+            if ((ret = mf_wait_events(avctx)) < 0)
+                return ret;
+            if (!c->async_need_input)
+                return AVERROR(EAGAIN);
+        }
+        if (!c->sample_sent)
+            IMFSample_SetUINT32(sample, &MFSampleExtension_Discontinuity, TRUE);
+        c->sample_sent = 1;
+        hr = IMFTransform_ProcessInput(c->mft, c->in_stream_id, sample, 0);
+        if (hr == MF_E_NOTACCEPTING) {
+            return AVERROR(EAGAIN);
+        } else if (FAILED(hr)) {
+            av_log(avctx, AV_LOG_ERROR, "failed processing input: %s\n", ff_hr_str(hr));
+            return AVERROR_EXTERNAL;
+        }
+        c->async_need_input = 0;
+    } else if (!c->draining) {
+        hr = IMFTransform_ProcessMessage(c->mft, MFT_MESSAGE_COMMAND_DRAIN, 0);
+        if (FAILED(hr))
+            av_log(avctx, AV_LOG_ERROR, "failed draining: %s\n", ff_hr_str(hr));
+        // Some MFTs (AC3) will send a frame after each drain command (???), so
+        // this is required to make draining actually terminate.
+        c->draining = 1;
+        c->async_need_input = 0;
+    } else {
+        return AVERROR_EOF;
+    }
+    return 0;
+}
+
+static int mf_send_frame(AVCodecContext *avctx, const AVFrame *frame)
+{
+    MFContext *c = avctx->priv_data;
+    int ret;
+    IMFSample *sample = NULL;
+    if (frame) {
+        sample = mf_avframe_to_sample(avctx, frame);
+        if (!sample)
+            return AVERROR(ENOMEM);
+        if (c->is_video && c->codec_api) {
+            if (frame->pict_type == AV_PICTURE_TYPE_I || !c->sample_sent)
+                ICodecAPI_SetValue(c->codec_api, &ff_CODECAPI_AVEncVideoForceKeyFrame, FF_VAL_VT_UI4(1));
+        }
+    }
+    ret = mf_send_sample(avctx, sample);
+    if (sample)
+        IMFSample_Release(sample);
+    return ret;
+}
+
+static int mf_receive_sample(AVCodecContext *avctx, IMFSample **out_sample)
+{
+    MFContext *c = avctx->priv_data;
+    HRESULT hr;
+    DWORD st;
+    MFT_OUTPUT_DATA_BUFFER out_buffers;
+    IMFSample *sample;
+    int ret = 0;
+
+    while (1) {
+        *out_sample = NULL;
+        sample = NULL;
+
+        if (c->async_events) {
+            if ((ret = mf_wait_events(avctx)) < 0)
+                return ret;
+            if (!c->async_have_output || c->draining_done) {
+                ret = 0;
+                break;
+            }
+        }
+
+        if (!c->out_stream_provides_samples) {
+            sample = ff_create_memory_sample(NULL, c->out_info.cbSize, c->out_info.cbAlignment);
+            if (!sample)
+                return AVERROR(ENOMEM);
+        }
+
+        out_buffers = (MFT_OUTPUT_DATA_BUFFER) {
+            .dwStreamID = c->out_stream_id,
+            .pSample = sample,
+        };
+
+        st = 0;
+        hr = IMFTransform_ProcessOutput(c->mft, 0, 1, &out_buffers, &st);
+
+        if (out_buffers.pEvents)
+            IMFCollection_Release(out_buffers.pEvents);
+
+        if (!FAILED(hr)) {
+            *out_sample = out_buffers.pSample;
+            ret = 0;
+            break;
+        }
+
+        if (out_buffers.pSample)
+            IMFSample_Release(out_buffers.pSample);
+
+        if (hr == MF_E_TRANSFORM_NEED_MORE_INPUT) {
+            if (c->draining)
+                c->draining_done = 1;
+            ret = 0;
+        } else if (hr == MF_E_TRANSFORM_STREAM_CHANGE) {
+            av_log(avctx, AV_LOG_WARNING, "stream format change\n");
+            ret = mf_choose_output_type(avctx);
+            if (ret == 0) // we don't expect renegotiating the input type
+                ret = AVERROR_EXTERNAL;
+            if (ret > 0) {
+                ret = mf_setup_context(avctx);
+                if (ret >= 0) {
+                    c->async_have_output = 0;
+                    continue;
+                }
+            }
+        } else {
+            av_log(avctx, AV_LOG_ERROR, "failed processing output: %s\n", ff_hr_str(hr));
+            ret = AVERROR_EXTERNAL;
+        }
+
+        break;
+    }
+
+    c->async_have_output = 0;
+
+    if (ret >= 0 && !*out_sample)
+        ret = c->draining_done ? AVERROR_EOF : AVERROR(EAGAIN);
+
+    return ret;
+}
+
+static int mf_receive_packet(AVCodecContext *avctx, AVPacket *avpkt)
+{
+    IMFSample *sample;
+    int ret;
+
+    ret = mf_receive_sample(avctx, &sample);
+    if (ret < 0)
+        return ret;
+
+    ret = mf_sample_to_avpacket(avctx, sample, avpkt);
+    IMFSample_Release(sample);
+
+    return ret;
+}
+
+// Most encoders seem to enumerate supported audio formats on the output types,
+// at least as far as channel configuration and sample rate is concerned. Pick
+// the one which seems to match best.
+static int64_t mf_enca_output_score(AVCodecContext *avctx, IMFMediaType *type)
+{
+    MFContext *c = avctx->priv_data;
+    HRESULT hr;
+    UINT32 t;
+    GUID tg;
+    int64_t score = 0;
+
+    hr = IMFAttributes_GetUINT32(type, &MF_MT_AUDIO_SAMPLES_PER_SECOND, &t);
+    if (!FAILED(hr) && t == avctx->sample_rate)
+        score |= 1LL << 32;
+
+    hr = IMFAttributes_GetUINT32(type, &MF_MT_AUDIO_NUM_CHANNELS, &t);
+    if (!FAILED(hr) && t == avctx->channels)
+        score |= 2LL << 32;
+
+    hr = IMFAttributes_GetGUID(type, &MF_MT_SUBTYPE, &tg);
+    if (!FAILED(hr)) {
+        if (IsEqualGUID(&c->main_subtype, &tg))
+            score |= 4LL << 32;
+    }
+
+    // Select the bitrate (lowest priority).
+    hr = IMFAttributes_GetUINT32(type, &MF_MT_AUDIO_AVG_BYTES_PER_SECOND, &t);
+    if (!FAILED(hr)) {
+        int diff = (int)t - avctx->bit_rate / 8;
+        if (diff >= 0) {
+            score |= (1LL << 31) - diff; // prefer lower bitrate
+        } else {
+            score |= (1LL << 30) + diff; // prefer higher bitrate
+        }
+    }
+
+    hr = IMFAttributes_GetUINT32(type, &MF_MT_AAC_PAYLOAD_TYPE, &t);
+    if (!FAILED(hr) && t != 0)
+        return -1;
+
+    return score;
+}
+
+static int mf_enca_output_adjust(AVCodecContext *avctx, IMFMediaType *type)
+{
+    // (some decoders allow adjusting this freely, but it can also cause failure
+    //  to set the output type - so it's commented for being too fragile)
+    //IMFAttributes_SetUINT32(type, &MF_MT_AUDIO_AVG_BYTES_PER_SECOND, avctx->bit_rate / 8);
+    //IMFAttributes_SetUINT32(type, &MF_MT_AVG_BITRATE, avctx->bit_rate);
+
+    return 0;
+}
+
+static int64_t mf_enca_input_score(AVCodecContext *avctx, IMFMediaType *type)
+{
+    HRESULT hr;
+    UINT32 t;
+    int64_t score = 0;
+
+    enum AVSampleFormat sformat = ff_media_type_to_sample_fmt((IMFAttributes *)type);
+    if (sformat == AV_SAMPLE_FMT_NONE)
+        return -1; // can not use
+
+    if (sformat == avctx->sample_fmt)
+        score |= 1;
+
+    hr = IMFAttributes_GetUINT32(type, &MF_MT_AUDIO_SAMPLES_PER_SECOND, &t);
+    if (!FAILED(hr) && t == avctx->sample_rate)
+        score |= 2;
+
+    hr = IMFAttributes_GetUINT32(type, &MF_MT_AUDIO_NUM_CHANNELS, &t);
+    if (!FAILED(hr) && t == avctx->channels)
+        score |= 4;
+
+    return score;
+}
+
+static int mf_enca_input_adjust(AVCodecContext *avctx, IMFMediaType *type)
+{
+    HRESULT hr;
+    UINT32 t;
+
+    enum AVSampleFormat sformat = ff_media_type_to_sample_fmt((IMFAttributes *)type);
+    if (sformat != avctx->sample_fmt) {
+        av_log(avctx, AV_LOG_ERROR, "unsupported input sample format set\n");
+        return AVERROR(EINVAL);
+    }
+
+    hr = IMFAttributes_GetUINT32(type, &MF_MT_AUDIO_SAMPLES_PER_SECOND, &t);
+    if (FAILED(hr) || t != avctx->sample_rate) {
+        av_log(avctx, AV_LOG_ERROR, "unsupported input sample rate set\n");
+        return AVERROR(EINVAL);
+    }
+
+    hr = IMFAttributes_GetUINT32(type, &MF_MT_AUDIO_NUM_CHANNELS, &t);
+    if (FAILED(hr) || t != avctx->channels) {
+        av_log(avctx, AV_LOG_ERROR, "unsupported input channel number set\n");
+        return AVERROR(EINVAL);
+    }
+
+    return 0;
+}
+
+static int64_t mf_encv_output_score(AVCodecContext *avctx, IMFMediaType *type)
+{
+    MFContext *c = avctx->priv_data;
+    GUID tg;
+    HRESULT hr;
+    int score = -1;
+
+    hr = IMFAttributes_GetGUID(type, &MF_MT_SUBTYPE, &tg);
+    if (!FAILED(hr)) {
+        if (IsEqualGUID(&c->main_subtype, &tg))
+            score = 1;
+    }
+
+    return score;
+}
+
+static int mf_encv_output_adjust(AVCodecContext *avctx, IMFMediaType *type)
+{
+    MFContext *c = avctx->priv_data;
+
+    ff_MFSetAttributeSize((IMFAttributes *)type, &MF_MT_FRAME_SIZE, avctx->width, avctx->height);
+    IMFAttributes_SetUINT32(type, &MF_MT_INTERLACE_MODE, MFVideoInterlace_Progressive);
+
+    ff_MFSetAttributeRatio((IMFAttributes *)type, &MF_MT_FRAME_RATE, avctx->framerate.num, avctx->framerate.den);
+
+    // (MS HEVC supports eAVEncH265VProfile_Main_420_8 only.)
+    if (avctx->codec_id == AV_CODEC_ID_H264) {
+        UINT32 profile = eAVEncH264VProfile_Base;
+        switch (avctx->profile) {
+        case FF_PROFILE_H264_MAIN:
+            profile = eAVEncH264VProfile_Main;
+            break;
+        case FF_PROFILE_H264_HIGH:
+            profile = eAVEncH264VProfile_High;
+            break;
+        }
+        IMFAttributes_SetUINT32(type, &MF_MT_MPEG2_PROFILE, profile);
+    }
+
+    IMFAttributes_SetUINT32(type, &MF_MT_AVG_BITRATE, avctx->bit_rate);
+
+    // Note that some of the ICodecAPI options must be set before SetOutputType.
+    if (c->codec_api) {
+        if (avctx->bit_rate)
+            ICodecAPI_SetValue(c->codec_api, &ff_CODECAPI_AVEncCommonMeanBitRate, FF_VAL_VT_UI4(avctx->bit_rate));
+
+        if (c->opt_enc_rc >= 0)
+            ICodecAPI_SetValue(c->codec_api, &ff_CODECAPI_AVEncCommonRateControlMode, FF_VAL_VT_UI4(c->opt_enc_rc));
+
+        if (c->opt_enc_quality >= 0)
+            ICodecAPI_SetValue(c->codec_api, &ff_CODECAPI_AVEncCommonQuality, FF_VAL_VT_UI4(c->opt_enc_quality));
+
+        // Always set the number of b-frames. Qualcomm's HEVC encoder on SD835
+        // defaults this to 1, and that setting is buggy with many of the
+        // rate control modes. (0 or 2 b-frames works fine with most rate
+        // control modes, but 2 seems buggy with the u_vbr mode.) Setting
+        // "scenario" to "camera_record" sets it in CFR mode (where the default
+        // is VFR), which makes the encoder avoid dropping frames.
+        ICodecAPI_SetValue(c->codec_api, &ff_CODECAPI_AVEncMPVDefaultBPictureCount, FF_VAL_VT_UI4(avctx->max_b_frames));
+        avctx->has_b_frames = avctx->max_b_frames > 1 ? 1 : 0;
+
+        ICodecAPI_SetValue(c->codec_api, &ff_CODECAPI_AVEncH264CABACEnable, FF_VAL_VT_BOOL(1));
+
+        if (c->opt_enc_scenario >= 0)
+            ICodecAPI_SetValue(c->codec_api, &ff_CODECAPI_AVScenarioInfo, FF_VAL_VT_UI4(c->opt_enc_scenario));
+    }
+
+    return 0;
+}
+
+static int64_t mf_encv_input_score(AVCodecContext *avctx, IMFMediaType *type)
+{
+    enum AVPixelFormat pix_fmt = ff_media_type_to_pix_fmt((IMFAttributes *)type);
+    if (pix_fmt != avctx->pix_fmt)
+        return -1; // can not use
+
+    return 0;
+}
+
+static int mf_encv_input_adjust(AVCodecContext *avctx, IMFMediaType *type)
+{
+    enum AVPixelFormat pix_fmt = ff_media_type_to_pix_fmt((IMFAttributes *)type);
+    if (pix_fmt != avctx->pix_fmt) {
+        av_log(avctx, AV_LOG_ERROR, "unsupported input pixel format set\n");
+        return AVERROR(EINVAL);
+    }
+
+    //ff_MFSetAttributeSize((IMFAttributes *)type, &MF_MT_FRAME_SIZE, avctx->width, avctx->height);
+
+    return 0;
+}
+
+static int mf_choose_output_type(AVCodecContext *avctx)
+{
+    MFContext *c = avctx->priv_data;
+    HRESULT hr;
+    int ret;
+    IMFMediaType *out_type = NULL;
+    int64_t out_type_score = -1;
+    int out_type_index = -1;
+    int n;
+
+    av_log(avctx, AV_LOG_VERBOSE, "output types:\n");
+    for (n = 0; ; n++) {
+        IMFMediaType *type;
+        int64_t score = -1;
+
+        hr = IMFTransform_GetOutputAvailableType(c->mft, c->out_stream_id, n, &type);
+        if (hr == MF_E_NO_MORE_TYPES || hr == E_NOTIMPL)
+            break;
+        if (hr == MF_E_TRANSFORM_TYPE_NOT_SET) {
+            av_log(avctx, AV_LOG_VERBOSE, "(need to set input type)\n");
+            ret = 0;
+            goto done;
+        }
+        if (FAILED(hr)) {
+            av_log(avctx, AV_LOG_ERROR, "error getting output type: %s\n", ff_hr_str(hr));
+            ret = AVERROR_EXTERNAL;
+            goto done;
+        }
+
+        av_log(avctx, AV_LOG_VERBOSE, "output type %d:\n", n);
+        ff_media_type_dump(avctx, type);
+
+        if (c->is_video) {
+            score = mf_encv_output_score(avctx, type);
+        } else if (c->is_audio) {
+            score = mf_enca_output_score(avctx, type);
+        }
+
+        if (score > out_type_score) {
+            if (out_type)
+                IMFMediaType_Release(out_type);
+            out_type = type;
+            out_type_score = score;
+            out_type_index = n;
+            IMFMediaType_AddRef(out_type);
+        }
+
+        IMFMediaType_Release(type);
+    }
+
+    if (out_type) {
+        av_log(avctx, AV_LOG_VERBOSE, "picking output type %d.\n", out_type_index);
+    } else {
+        hr = MFCreateMediaType(&out_type);
+        if (FAILED(hr)) {
+            ret = AVERROR(ENOMEM);
+            goto done;
+        }
+    }
+
+    ret = 0;
+    if (c->is_video) {
+        ret = mf_encv_output_adjust(avctx, out_type);
+    } else if (c->is_audio) {
+        ret = mf_enca_output_adjust(avctx, out_type);
+    }
+
+    if (ret >= 0) {
+        av_log(avctx, AV_LOG_VERBOSE, "setting output type:\n");
+        ff_media_type_dump(avctx, out_type);
+
+        hr = IMFTransform_SetOutputType(c->mft, c->out_stream_id, out_type, 0);
+        if (!FAILED(hr)) {
+            ret = 1;
+        } else if (hr == MF_E_TRANSFORM_TYPE_NOT_SET) {
+            av_log(avctx, AV_LOG_VERBOSE, "rejected - need to set input type\n");
+            ret = 0;
+        } else {
+            av_log(avctx, AV_LOG_ERROR, "could not set output type (%s)\n", ff_hr_str(hr));
+            ret = AVERROR_EXTERNAL;
+        }
+    }
+
+done:
+    if (out_type)
+        IMFMediaType_Release(out_type);
+    return ret;
+}
+
+static int mf_choose_input_type(AVCodecContext *avctx)
+{
+    MFContext *c = avctx->priv_data;
+    HRESULT hr;
+    int ret;
+    IMFMediaType *in_type = NULL;
+    int64_t in_type_score = -1;
+    int in_type_index = -1;
+    int n;
+
+    av_log(avctx, AV_LOG_VERBOSE, "input types:\n");
+    for (n = 0; ; n++) {
+        IMFMediaType *type = NULL;
+        int64_t score = -1;
+
+        hr = IMFTransform_GetInputAvailableType(c->mft, c->in_stream_id, n, &type);
+        if (hr == MF_E_NO_MORE_TYPES || hr == E_NOTIMPL)
+            break;
+        if (hr == MF_E_TRANSFORM_TYPE_NOT_SET) {
+            av_log(avctx, AV_LOG_VERBOSE, "(need to set output type 1)\n");
+            ret = 0;
+            goto done;
+        }
+        if (FAILED(hr)) {
+            av_log(avctx, AV_LOG_ERROR, "error getting input type: %s\n", ff_hr_str(hr));
+            ret = AVERROR_EXTERNAL;
+            goto done;
+        }
+
+        av_log(avctx, AV_LOG_VERBOSE, "input type %d:\n", n);
+        ff_media_type_dump(avctx, type);
+
+        if (c->is_video) {
+            score = mf_encv_input_score(avctx, type);
+        } else if (c->is_audio) {
+            score = mf_enca_input_score(avctx, type);
+        }
+
+        if (score > in_type_score) {
+            if (in_type)
+                IMFMediaType_Release(in_type);
+            in_type = type;
+            in_type_score = score;
+            in_type_index = n;
+            IMFMediaType_AddRef(in_type);
+        }
+
+        IMFMediaType_Release(type);
+    }
+
+    if (in_type) {
+        av_log(avctx, AV_LOG_VERBOSE, "picking input type %d.\n", in_type_index);
+    } else {
+        // Some buggy MFTs (WMA encoder) fail to return MF_E_TRANSFORM_TYPE_NOT_SET.
+        av_log(avctx, AV_LOG_VERBOSE, "(need to set output type 2)\n");
+        ret = 0;
+        goto done;
+    }
+
+    ret = 0;
+    if (c->is_video) {
+        ret = mf_encv_input_adjust(avctx, in_type);
+    } else if (c->is_audio) {
+        ret = mf_enca_input_adjust(avctx, in_type);
+    }
+
+    if (ret >= 0) {
+        av_log(avctx, AV_LOG_VERBOSE, "setting input type:\n");
+        ff_media_type_dump(avctx, in_type);
+
+        hr = IMFTransform_SetInputType(c->mft, c->in_stream_id, in_type, 0);
+        if (!FAILED(hr)) {
+            ret = 1;
+        } else if (hr == MF_E_TRANSFORM_TYPE_NOT_SET) {
+            av_log(avctx, AV_LOG_VERBOSE, "rejected - need to set output type\n");
+            ret = 0;
+        } else {
+            av_log(avctx, AV_LOG_ERROR, "could not set input type (%s)\n", ff_hr_str(hr));
+            ret = AVERROR_EXTERNAL;
+        }
+    }
+
+done:
+    if (in_type)
+        IMFMediaType_Release(in_type);
+    return ret;
+}
+
+static int mf_negotiate_types(AVCodecContext *avctx)
+{
+    // This follows steps 1-5 on:
+    //  https://msdn.microsoft.com/en-us/library/windows/desktop/aa965264(v=vs.85).aspx
+    // If every MFT implementer does this correctly, this loop should at worst
+    // be repeated once.
+    int need_input = 1, need_output = 1;
+    int n;
+    for (n = 0; n < 2 && (need_input || need_output); n++) {
+        int ret;
+        ret = mf_choose_input_type(avctx);
+        if (ret < 0)
+            return ret;
+        need_input = ret < 1;
+        ret = mf_choose_output_type(avctx);
+        if (ret < 0)
+            return ret;
+        need_output = ret < 1;
+    }
+    if (need_input || need_output) {
+        av_log(avctx, AV_LOG_ERROR, "format negotiation failed (%d/%d)\n",
+               need_input, need_output);
+        return AVERROR_EXTERNAL;
+    }
+    return 0;
+}
+
+static int mf_setup_context(AVCodecContext *avctx)
+{
+    MFContext *c = avctx->priv_data;
+    HRESULT hr;
+    int ret;
+
+    hr = IMFTransform_GetInputStreamInfo(c->mft, c->in_stream_id, &c->in_info);
+    if (FAILED(hr))
+        return AVERROR_EXTERNAL;
+    av_log(avctx, AV_LOG_VERBOSE, "in_info: size=%d, align=%d\n",
+           (int)c->in_info.cbSize, (int)c->in_info.cbAlignment);
+
+    hr = IMFTransform_GetOutputStreamInfo(c->mft, c->out_stream_id, &c->out_info);
+    if (FAILED(hr))
+        return AVERROR_EXTERNAL;
+    c->out_stream_provides_samples =
+        (c->out_info.dwFlags & MFT_OUTPUT_STREAM_PROVIDES_SAMPLES) ||
+        (c->out_info.dwFlags & MFT_OUTPUT_STREAM_CAN_PROVIDE_SAMPLES);
+    av_log(avctx, AV_LOG_VERBOSE, "out_info: size=%d, align=%d%s\n",
+           (int)c->out_info.cbSize, (int)c->out_info.cbAlignment,
+           c->out_stream_provides_samples ? " (provides samples)" : "");
+
+    if ((ret = mf_output_type_get(avctx)) < 0)
+        return ret;
+
+    return 0;
+}
+
+static int mf_unlock_async(AVCodecContext *avctx)
+{
+    MFContext *c = avctx->priv_data;
+    HRESULT hr;
+    IMFAttributes *attrs;
+    UINT32 v;
+    int res = AVERROR_EXTERNAL;
+
+    // For hw encoding we unfortunately need to use async mode, otherwise
+    // play it safe and avoid it.
+    if (!(c->is_video && c->opt_enc_hw))
+        return 0;
+
+    hr = IMFTransform_GetAttributes(c->mft, &attrs);
+    if (FAILED(hr)) {
+        av_log(avctx, AV_LOG_ERROR, "error retrieving MFT attributes: %s\n", ff_hr_str(hr));
+        goto err;
+    }
+
+    hr = IMFAttributes_GetUINT32(attrs, &MF_TRANSFORM_ASYNC, &v);
+    if (FAILED(hr)) {
+        av_log(avctx, AV_LOG_ERROR, "error querying async: %s\n", ff_hr_str(hr));
+        goto err;
+    }
+
+    if (!v) {
+        av_log(avctx, AV_LOG_ERROR, "hardware MFT is not async\n");
+        goto err;
+    }
+
+    hr = IMFAttributes_SetUINT32(attrs, &MF_TRANSFORM_ASYNC_UNLOCK, TRUE);
+    if (FAILED(hr)) {
+        av_log(avctx, AV_LOG_ERROR, "could not set async unlock: %s\n", ff_hr_str(hr));
+        goto err;
+    }
+
+    hr = IMFTransform_QueryInterface(c->mft, &IID_IMFMediaEventGenerator, (void **)&c->async_events);
+    if (FAILED(hr)) {
+        av_log(avctx, AV_LOG_ERROR, "could not get async interface\n");
+        goto err;
+    }
+
+    res = 0;
+
+err:
+    IMFAttributes_Release(attrs);
+    return res;
+}
+
+static int mf_create(void *log, IMFTransform **mft, const AVCodec *codec, int use_hw)
+{
+    int is_audio = codec->type == AVMEDIA_TYPE_AUDIO;
+    const CLSID *subtype = ff_codec_to_mf_subtype(codec->id);
+    MFT_REGISTER_TYPE_INFO reg = {0};
+    GUID category;
+    int ret;
+
+    *mft = NULL;
+
+    if (!subtype)
+        return AVERROR(ENOSYS);
+
+    reg.guidSubtype = *subtype;
+
+    if (is_audio) {
+        reg.guidMajorType = MFMediaType_Audio;
+        category = MFT_CATEGORY_AUDIO_ENCODER;
+    } else {
+        reg.guidMajorType = MFMediaType_Video;
+        category = MFT_CATEGORY_VIDEO_ENCODER;
+    }
+
+    if ((ret = ff_instantiate_mf(log, category, NULL, &reg, use_hw, mft)) < 0)
+        return ret;
+
+    return 0;
+}
+
+static int mf_init(AVCodecContext *avctx)
+{
+    MFContext *c = avctx->priv_data;
+    HRESULT hr;
+    int ret;
+    const CLSID *subtype = ff_codec_to_mf_subtype(avctx->codec_id);
+    int use_hw = 0;
+
+    c->is_audio = avctx->codec_type == AVMEDIA_TYPE_AUDIO;
+    c->is_video = !c->is_audio;
+    c->reorder_delay = AV_NOPTS_VALUE;
+
+    if (c->is_video && c->opt_enc_hw)
+        use_hw = 1;
+
+    if (!subtype)
+        return AVERROR(ENOSYS);
+
+    c->main_subtype = *subtype;
+
+    if ((ret = mf_create(avctx, &c->mft, avctx->codec, use_hw)) < 0)
+        return ret;
+
+    if ((ret = mf_unlock_async(avctx)) < 0)
+        return ret;
+
+    hr = IMFTransform_QueryInterface(c->mft, &IID_ICodecAPI, (void **)&c->codec_api);
+    if (!FAILED(hr))
+        av_log(avctx, AV_LOG_VERBOSE, "MFT supports ICodecAPI.\n");
+
+
+    hr = IMFTransform_GetStreamIDs(c->mft, 1, &c->in_stream_id, 1, &c->out_stream_id);
+    if (hr == E_NOTIMPL) {
+        c->in_stream_id = c->out_stream_id = 0;
+    } else if (FAILED(hr)) {
+        av_log(avctx, AV_LOG_ERROR, "could not get stream IDs (%s)\n", ff_hr_str(hr));
+        return AVERROR_EXTERNAL;
+    }
+
+    if ((ret = mf_negotiate_types(avctx)) < 0)
+        return ret;
+
+    if ((ret = mf_setup_context(avctx)) < 0)
+        return ret;
+
+    hr = IMFTransform_ProcessMessage(c->mft, MFT_MESSAGE_NOTIFY_BEGIN_STREAMING, 0);
+    if (FAILED(hr)) {
+        av_log(avctx, AV_LOG_ERROR, "could not start streaming (%s)\n", ff_hr_str(hr));
+        return AVERROR_EXTERNAL;
+    }
+
+    hr = IMFTransform_ProcessMessage(c->mft, MFT_MESSAGE_NOTIFY_START_OF_STREAM, 0);
+    if (FAILED(hr)) {
+        av_log(avctx, AV_LOG_ERROR, "could not start stream (%s)\n", ff_hr_str(hr));
+        return AVERROR_EXTERNAL;
+    }
+
+    if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER && c->async_events &&
+        c->is_video && !avctx->extradata) {
+        int sleep = 10000, total = 0;
+        av_log(avctx, AV_LOG_VERBOSE, "Awaiting extradata\n");
+        while (total < 70*1000) {
+            // The Qualcomm H264 encoder on SD835 doesn't provide extradata
+            // immediately, but it becomes available soon after init (without
+            // any waitable event). In practice, it's available after less
+            // than 10 ms, but wait for up to 70 ms before giving up.
+            // Some encoders (Qualcomm's HEVC encoder on SD835, some versions
+            // of the QSV H264 encoder at least) don't provide extradata this
+            // way at all, not even after encoding a frame - it's only
+            // available prepended to frames.
+            av_usleep(sleep);
+            total += sleep;
+            mf_output_type_get(avctx);
+            if (avctx->extradata)
+                break;
+            sleep *= 2;
+        }
+        av_log(avctx, AV_LOG_VERBOSE, "%s extradata in %d ms\n",
+               avctx->extradata ? "Got" : "Didn't get", total / 1000);
+    }
+
+    return 0;
+}
+
+static int mf_close(AVCodecContext *avctx)
+{
+    MFContext *c = avctx->priv_data;
+
+    if (c->codec_api)
+        ICodecAPI_Release(c->codec_api);
+
+    if (c->async_events)
+        IMFMediaEventGenerator_Release(c->async_events);
+
+    ff_free_mf(&c->mft);
+
+    av_freep(&avctx->extradata);
+    avctx->extradata_size = 0;
+
+    return 0;
+}
+
+#define OFFSET(x) offsetof(MFContext, x)
+
+#define MF_ENCODER(MEDIATYPE, NAME, ID, OPTS, EXTRA) \
+    static const AVClass ff_ ## NAME ## _mf_encoder_class = {                  \
+        .class_name = #NAME "_mf",                                             \
+        .item_name  = av_default_item_name,                                    \
+        .option     = OPTS,                                                    \
+        .version    = LIBAVUTIL_VERSION_INT,                                   \
+    };                                                                         \
+    AVCodec ff_ ## NAME ## _mf_encoder = {                                     \
+        .priv_class     = &ff_ ## NAME ## _mf_encoder_class,                   \
+        .name           = #NAME "_mf",                                         \
+        .long_name      = NULL_IF_CONFIG_SMALL(#ID " via MediaFoundation"),    \
+        .type           = AVMEDIA_TYPE_ ## MEDIATYPE,                          \
+        .id             = AV_CODEC_ID_ ## ID,                                  \
+        .priv_data_size = sizeof(MFContext),                                   \
+        .init           = mf_init,                                             \
+        .close          = mf_close,                                            \
+        .send_frame     = mf_send_frame,                                       \
+        .receive_packet = mf_receive_packet,                                   \
+        EXTRA                                                                  \
+        .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_HYBRID,            \
+        .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE |                       \
+                          FF_CODEC_CAP_INIT_CLEANUP,                           \
+    };
+
+#define AFMTS \
+        .sample_fmts    = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16,    \
+                                                         AV_SAMPLE_FMT_NONE },
+
+MF_ENCODER(AUDIO, aac,         AAC, NULL, AFMTS);
+MF_ENCODER(AUDIO, ac3,         AC3, NULL, AFMTS);
+MF_ENCODER(AUDIO, mp3,         MP3, NULL, AFMTS);
+
+#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
+static const AVOption venc_opts[] = {
+    {"rate_control",  "Select rate control mode", OFFSET(opt_enc_rc), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, VE, "rate_control"},
+    { "default",      "Default mode", 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, VE, "rate_control"},
+    { "cbr",          "CBR mode", 0, AV_OPT_TYPE_CONST, {.i64 = ff_eAVEncCommonRateControlMode_CBR}, 0, 0, VE, "rate_control"},
+    { "pc_vbr",       "Peak constrained VBR mode", 0, AV_OPT_TYPE_CONST, {.i64 = ff_eAVEncCommonRateControlMode_PeakConstrainedVBR}, 0, 0, VE, "rate_control"},
+    { "u_vbr",        "Unconstrained VBR mode", 0, AV_OPT_TYPE_CONST, {.i64 = ff_eAVEncCommonRateControlMode_UnconstrainedVBR}, 0, 0, VE, "rate_control"},
+    { "quality",      "Quality mode", 0, AV_OPT_TYPE_CONST, {.i64 = ff_eAVEncCommonRateControlMode_Quality}, 0, 0, VE, "rate_control" },
+    // The following rate_control modes require Windows 8.
+    { "ld_vbr",       "Low delay VBR mode", 0, AV_OPT_TYPE_CONST, {.i64 = ff_eAVEncCommonRateControlMode_LowDelayVBR}, 0, 0, VE, "rate_control"},
+    { "g_vbr",        "Global VBR mode", 0, AV_OPT_TYPE_CONST, {.i64 = ff_eAVEncCommonRateControlMode_GlobalVBR}, 0, 0, VE, "rate_control" },
+    { "gld_vbr",      "Global low delay VBR mode", 0, AV_OPT_TYPE_CONST, {.i64 = ff_eAVEncCommonRateControlMode_GlobalLowDelayVBR}, 0, 0, VE, "rate_control"},
+
+    {"scenario",          "Select usage scenario", OFFSET(opt_enc_scenario), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, VE, "scenario"},
+    { "default",          "Default scenario", 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, VE, "scenario"},
+    { "display_remoting", "Display remoting", 0, AV_OPT_TYPE_CONST, {.i64 = ff_eAVScenarioInfo_DisplayRemoting}, 0, 0, VE, "scenario"},
+    { "video_conference", "Video conference", 0, AV_OPT_TYPE_CONST, {.i64 = ff_eAVScenarioInfo_VideoConference}, 0, 0, VE, "scenario"},
+    { "archive",          "Archive", 0, AV_OPT_TYPE_CONST, {.i64 = ff_eAVScenarioInfo_Archive}, 0, 0, VE, "scenario"},
+    { "live_streaming",   "Live streaming", 0, AV_OPT_TYPE_CONST, {.i64 = ff_eAVScenarioInfo_LiveStreaming}, 0, 0, VE, "scenario"},
+    { "camera_record",    "Camera record", 0, AV_OPT_TYPE_CONST, {.i64 = ff_eAVScenarioInfo_CameraRecord}, 0, 0, VE, "scenario"},
+    { "display_remoting_with_feature_map", "Display remoting with feature map", 0, AV_OPT_TYPE_CONST, {.i64 = ff_eAVScenarioInfo_DisplayRemotingWithFeatureMap}, 0, 0, VE, "scenario"},
+
+    {"quality",       "Quality", OFFSET(opt_enc_quality), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 100, VE},
+    {"hw_encoding",   "Force hardware encoding", OFFSET(opt_enc_hw), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, VE},
+    {NULL}
+};
+
+#define VFMTS \
+        .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_NV12,       \
+                                                        AV_PIX_FMT_YUV420P,    \
+                                                        AV_PIX_FMT_NONE },
+
+MF_ENCODER(VIDEO, h264,        H264, venc_opts, VFMTS);
+MF_ENCODER(VIDEO, hevc,        HEVC, venc_opts, VFMTS);

libavcodec/version.h

@@ -28,7 +28,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVCODEC_VERSION_MAJOR  58
-#define LIBAVCODEC_VERSION_MINOR  85
+#define LIBAVCODEC_VERSION_MINOR  86
 #define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \