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FFmpeg/libavcodec/mfenc.c
Anton Khirnov 7d1d61cc5f lavc: deprecate AVCodecContext.ticks_per_frame 
For encoding, this field is entirely redundant with
AVCodecContext.framerate.

For decoding, this field is entirely redundant with
AV_CODEC_PROP_FIELDS.
2023-05-15 10:56:18 +02:00

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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 "encode.h"
#include "mf_utils.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/time.h"
#include "codec_internal.h"
#include "internal.h"
#include "compat/w32dlfcn.h"
typedef struct MFContext {
AVClass *av_class;
HMODULE library;
MFFunctions functions;
AVFrame *frame;
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->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 = ff_get_encode_buffer(avctx, avpkt, len, 0)) < 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->ch_layout.nb_channels;
len = frame->nb_samples * bps;
sample = ff_create_memory_sample(&c->functions, 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(&c->functions, 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->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_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(&c->functions, 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)
{
MFContext *c = avctx->priv_data;
IMFSample *sample = NULL;
int ret;
if (!c->frame->buf[0]) {
ret = ff_encode_get_frame(avctx, c->frame);
if (ret < 0 && ret != AVERROR_EOF)
return ret;
}
if (c->frame->buf[0]) {
sample = mf_avframe_to_sample(avctx, c->frame);
if (!sample) {
av_frame_unref(c->frame);
return AVERROR(ENOMEM);
}
if (c->is_video && c->codec_api) {
if (c->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);
if (ret != AVERROR(EAGAIN))
av_frame_unref(c->frame);
if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
return 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->ch_layout.nb_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->ch_layout.nb_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->ch_layout.nb_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;
AVRational framerate;
ff_MFSetAttributeSize((IMFAttributes *)type, &MF_MT_FRAME_SIZE, avctx->width, avctx->height);
IMFAttributes_SetUINT32(type, &MF_MT_INTERLACE_MODE, MFVideoInterlace_Progressive);
if (avctx->framerate.num > 0 && avctx->framerate.den > 0) {
framerate = avctx->framerate;
} else {
framerate = av_inv_q(avctx->time_base);
#if FF_API_TICKS_PER_FRAME
FF_DISABLE_DEPRECATION_WARNINGS
framerate.den *= avctx->ticks_per_frame;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
}
ff_MFSetAttributeRatio((IMFAttributes *)type, &MF_MT_FRAME_RATE, framerate.num, framerate.den);
// (MS HEVC supports eAVEncH265VProfile_Main_420_8 only.)
if (avctx->codec_id == AV_CODEC_ID_H264) {
UINT32 profile = ff_eAVEncH264VProfile_Base;
switch (avctx->profile) {
case FF_PROFILE_H264_MAIN:
profile = ff_eAVEncH264VProfile_Main;
break;
case FF_PROFILE_H264_HIGH:
profile = ff_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 > 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 = c->functions.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, MFFunctions *f, 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, f, category, NULL, &reg, use_hw, mft)) < 0)
return ret;
return 0;
}
static int mf_init_encoder(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->frame = av_frame_alloc();
if (!c->frame)
return AVERROR(ENOMEM);
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->functions, &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;
}
#if !HAVE_UWP
#define LOAD_MF_FUNCTION(context, func_name) \
context->functions.func_name = (void *)dlsym(context->library, #func_name); \
if (!context->functions.func_name) { \
av_log(context, AV_LOG_ERROR, "DLL mfplat.dll failed to find function "\
#func_name "\n"); \
return AVERROR_UNKNOWN; \
}
#else
// In UWP (which lacks LoadLibrary), just link directly against
// the functions - this requires building with new/complete enough
// import libraries.
#define LOAD_MF_FUNCTION(context, func_name) \
context->functions.func_name = func_name; \
if (!context->functions.func_name) { \
av_log(context, AV_LOG_ERROR, "Failed to find function " #func_name \
"\n"); \
return AVERROR_UNKNOWN; \
}
#endif
// Windows N editions does not provide MediaFoundation by default.
// So to avoid DLL loading error, MediaFoundation is dynamically loaded except
// on UWP build since LoadLibrary is not available on it.
static int mf_load_library(AVCodecContext *avctx)
{
MFContext *c = avctx->priv_data;
#if !HAVE_UWP
c->library = dlopen("mfplat.dll", 0);
if (!c->library) {
av_log(c, AV_LOG_ERROR, "DLL mfplat.dll failed to open\n");
return AVERROR_UNKNOWN;
}
#endif
LOAD_MF_FUNCTION(c, MFStartup);
LOAD_MF_FUNCTION(c, MFShutdown);
LOAD_MF_FUNCTION(c, MFCreateAlignedMemoryBuffer);
LOAD_MF_FUNCTION(c, MFCreateSample);
LOAD_MF_FUNCTION(c, MFCreateMediaType);
// MFTEnumEx is missing in Windows Vista's mfplat.dll.
LOAD_MF_FUNCTION(c, MFTEnumEx);
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);
#if !HAVE_UWP
if (c->library)
ff_free_mf(&c->functions, &c->mft);
dlclose(c->library);
c->library = NULL;
#else
ff_free_mf(&c->functions, &c->mft);
#endif
av_frame_free(&c->frame);
av_freep(&avctx->extradata);
avctx->extradata_size = 0;
return 0;
}
static int mf_init(AVCodecContext *avctx)
{
int ret;
if ((ret = mf_load_library(avctx)) == 0) {
if ((ret = mf_init_encoder(avctx)) == 0) {
return 0;
}
}
return ret;
}
#define OFFSET(x) offsetof(MFContext, x)
#define MF_ENCODER(MEDIATYPE, NAME, ID, OPTS, FMTS, CAPS) \
static const AVClass ff_ ## NAME ## _mf_encoder_class = { \
.class_name = #NAME "_mf", \
.item_name = av_default_item_name, \
.option = OPTS, \
.version = LIBAVUTIL_VERSION_INT, \
}; \
const FFCodec ff_ ## NAME ## _mf_encoder = { \
.p.priv_class = &ff_ ## NAME ## _mf_encoder_class, \
.p.name = #NAME "_mf", \
CODEC_LONG_NAME(#ID " via MediaFoundation"), \
.p.type = AVMEDIA_TYPE_ ## MEDIATYPE, \
.p.id = AV_CODEC_ID_ ## ID, \
.priv_data_size = sizeof(MFContext), \
.init = mf_init, \
.close = mf_close, \
FF_CODEC_RECEIVE_PACKET_CB(mf_receive_packet), \
FMTS \
CAPS \
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP, \
};
#define AFMTS \
.p.sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16, \
AV_SAMPLE_FMT_NONE },
#define ACAPS \
.p.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_HYBRID | \
AV_CODEC_CAP_DR1 | AV_CODEC_CAP_VARIABLE_FRAME_SIZE,
MF_ENCODER(AUDIO, aac, AAC, NULL, AFMTS, ACAPS);
MF_ENCODER(AUDIO, ac3, AC3, NULL, AFMTS, ACAPS);
MF_ENCODER(AUDIO, mp3, MP3, NULL, AFMTS, ACAPS);
#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 \
.p.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_NV12, \
AV_PIX_FMT_YUV420P, \
AV_PIX_FMT_NONE },
#define VCAPS \
.p.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_HYBRID | \
AV_CODEC_CAP_DR1,
MF_ENCODER(VIDEO, h264, H264, venc_opts, VFMTS, VCAPS);
MF_ENCODER(VIDEO, hevc, HEVC, venc_opts, VFMTS, VCAPS);
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