lavc: add Intel libmfx-based H.264 encoder

10 files changed, 656 insertions, 10 deletions

diff --git a/Changelog b/Changelog
index b9fd45b..0f414d1 100644
--- a/Changelog
+++ b/Changelog
@@ -24,6 +24,7 @@ version <next>:
 - VP9 RTP payload format (draft 0) experimental depacketizer
 - TDSC decoder
 - DTS lossless extension (XLL) decoding (not lossless, disabled by default)
+- Intel QSV-accelerated H.264 encoding
 
 
 version 11:
diff --git a/configure b/configure
index 4e2beb2..ed66937 100755
--- a/configure
+++ b/configure
@@ -1599,6 +1599,7 @@ CONFIG_EXTRA="
     qpeldsp
     qsv
     qsvdec
+    qsvenc
     rangecoder
     riffdec
     riffenc
@@ -1762,6 +1763,7 @@ mpegaudiodsp_select="dct"
 mpegvideo_select="blockdsp hpeldsp idctdsp me_cmp videodsp"
 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
 qsvdec_select="qsv"
+qsvenc_select="qsv"
 
 # decoders / encoders
 aac_decoder_select="imdct15 mdct sinewin"
@@ -1831,6 +1833,8 @@ h264_decoder_select="cabac golomb h264chroma h264dsp h264pred h264qpel startcode
 h264_decoder_suggest="error_resilience"
 h264_qsv_decoder_deps="libmfx"
 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
+h264_qsv_encoder_deps="libmfx"
+h264_qsv_encoder_select="qsvenc"
 hevc_decoder_select="bswapdsp cabac golomb videodsp"
 huffyuv_decoder_select="bswapdsp huffyuvdsp"
 huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp"
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 10a97c3..c633a4e 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -82,6 +82,7 @@ OBJS-$(CONFIG_PIXBLOCKDSP)             += pixblockdsp.o
 OBJS-$(CONFIG_QPELDSP)                 += qpeldsp.o
 OBJS-$(CONFIG_QSV)                     += qsv.o
 OBJS-$(CONFIG_QSVDEC)                  += qsvdec.o
+OBJS-$(CONFIG_QSVENC)                  += qsvenc.o
 OBJS-$(CONFIG_RANGECODER)              += rangecoder.o
 RDFT-OBJS-$(CONFIG_HARDCODED_TABLES)   += sin_tables.o
 OBJS-$(CONFIG_RDFT)                    += rdft.o $(RDFT-OBJS-yes)
@@ -224,6 +225,7 @@ OBJS-$(CONFIG_H264_DECODER)            += h264.o h264_cabac.o h264_cavlc.o \
                                           h264_mb.o h264_picture.o h264_ps.o \
                                           h264_refs.o h264_sei.o h264_slice.o
 OBJS-$(CONFIG_H264_QSV_DECODER)        += qsvdec_h264.o
+OBJS-$(CONFIG_H264_QSV_ENCODER)        += qsvenc_h264.o
 OBJS-$(CONFIG_HEVC_DECODER)            += hevc.o hevc_mvs.o hevc_ps.o hevc_sei.o \
                                           hevc_cabac.o hevc_refs.o hevcpred.o    \
                                           hevcdsp.o hevc_filter.o
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 9827719..e185e98 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -469,6 +469,7 @@ void avcodec_register_all(void)
     /* external libraries, that shouldn't be used by default if one of the
      * above is available */
     REGISTER_ENCODER(LIBOPENH264,       libopenh264);
+    REGISTER_ENCODER(H264_QSV,          h264_qsv);
 
     /* parsers */
     REGISTER_PARSER(AAC,                aac);
diff --git a/libavcodec/qsv_internal.h b/libavcodec/qsv_internal.h
index 4bfef4a..d13848a 100644
--- a/libavcodec/qsv_internal.h
+++ b/libavcodec/qsv_internal.h
@@ -21,11 +21,24 @@
 #ifndef AVCODEC_QSV_INTERNAL_H
 #define AVCODEC_QSV_INTERNAL_H
 
+#include <mfx/mfxvideo.h>
+
+#include "libavutil/frame.h"
+
 #define QSV_VERSION_MAJOR 1
 #define QSV_VERSION_MINOR 1
 
 #define ASYNC_DEPTH_DEFAULT 4       // internal parallelism
 
+typedef struct QSVFrame {
+    AVFrame *frame;
+    mfxFrameSurface1 *surface;
+
+    mfxFrameSurface1 surface_internal;
+
+    struct QSVFrame *next;
+} QSVFrame;
+
 /**
  * Convert a libmfx error code into a libav error code.
  */
diff --git a/libavcodec/qsvdec.h b/libavcodec/qsvdec.h
index 11d19fe..486a7e3 100644
--- a/libavcodec/qsvdec.h
+++ b/libavcodec/qsvdec.h
@@ -32,15 +32,7 @@
 #include "libavutil/pixfmt.h"
 
 #include "avcodec.h"
-
-typedef struct QSVFrame {
-    AVFrame *frame;
-    mfxFrameSurface1 *surface;
-
-    mfxFrameSurface1 surface_internal;
-
-    struct QSVFrame *next;
-} QSVFrame;
+#include "qsv_internal.h"
 
 typedef struct QSVContext {
     // the session used for decoding
diff --git a/libavcodec/qsvenc.c b/libavcodec/qsvenc.c
new file mode 100644
index 0000000..2830b0d
--- /dev/null
+++ b/libavcodec/qsvenc.c
@@ -0,0 +1,444 @@
+/*
+ * Intel MediaSDK QSV encoder utility functions
+ *
+ * copyright (c) 2013 Yukinori Yamazoe
+ * copyright (c) 2015 Anton Khirnov
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <string.h>
+#include <sys/types.h>
+#include <mfx/mfxvideo.h>
+
+#include "libavutil/common.h"
+#include "libavutil/mem.h"
+#include "libavutil/log.h"
+#include "libavutil/time.h"
+#include "libavutil/imgutils.h"
+
+#include "avcodec.h"
+#include "internal.h"
+#include "qsv.h"
+#include "qsv_internal.h"
+#include "qsvenc.h"
+
+static int init_video_param(AVCodecContext *avctx, QSVEncContext *q)
+{
+    const char *ratecontrol_desc;
+
+    float quant;
+    int ret;
+
+    ret = ff_qsv_codec_id_to_mfx(avctx->codec_id);
+    if (ret < 0)
+        return AVERROR_BUG;
+    q->param.mfx.CodecId = ret;
+
+    if (avctx->level > 0)
+        q->param.mfx.CodecLevel = avctx->level;
+
+    q->param.mfx.CodecProfile       = q->profile;
+    q->param.mfx.TargetUsage        = q->preset;
+    q->param.mfx.GopPicSize         = FFMAX(0, avctx->gop_size);
+    q->param.mfx.GopRefDist         = FFMAX(-1, avctx->max_b_frames) + 1;
+    q->param.mfx.GopOptFlag         = avctx->flags & CODEC_FLAG_CLOSED_GOP ?
+                                      MFX_GOP_CLOSED : 0;
+    q->param.mfx.IdrInterval        = q->idr_interval;
+    q->param.mfx.NumSlice           = avctx->slices;
+    q->param.mfx.NumRefFrame        = FFMAX(0, avctx->refs);
+    q->param.mfx.EncodedOrder       = 0;
+    q->param.mfx.BufferSizeInKB     = 0;
+
+    q->param.mfx.FrameInfo.FourCC         = MFX_FOURCC_NV12;
+    q->param.mfx.FrameInfo.Width          = FFALIGN(avctx->width, 16);
+    q->param.mfx.FrameInfo.Height         = FFALIGN(avctx->height, 32);
+    q->param.mfx.FrameInfo.CropX          = 0;
+    q->param.mfx.FrameInfo.CropY          = 0;
+    q->param.mfx.FrameInfo.CropW          = avctx->width;
+    q->param.mfx.FrameInfo.CropH          = avctx->height;
+    q->param.mfx.FrameInfo.AspectRatioW   = avctx->sample_aspect_ratio.num;
+    q->param.mfx.FrameInfo.AspectRatioH   = avctx->sample_aspect_ratio.den;
+    q->param.mfx.FrameInfo.PicStruct      = MFX_PICSTRUCT_PROGRESSIVE;
+    q->param.mfx.FrameInfo.ChromaFormat   = MFX_CHROMAFORMAT_YUV420;
+    q->param.mfx.FrameInfo.BitDepthLuma   = 8;
+    q->param.mfx.FrameInfo.BitDepthChroma = 8;
+
+    if (avctx->framerate.den > 0 && avctx->framerate.num > 0) {
+        q->param.mfx.FrameInfo.FrameRateExtN = avctx->framerate.num;
+        q->param.mfx.FrameInfo.FrameRateExtD = avctx->framerate.den;
+    } else {
+        q->param.mfx.FrameInfo.FrameRateExtN  = avctx->time_base.den;
+        q->param.mfx.FrameInfo.FrameRateExtD  = avctx->time_base.num;
+    }
+
+    if (avctx->flags & CODEC_FLAG_QSCALE) {
+        q->param.mfx.RateControlMethod = MFX_RATECONTROL_CQP;
+        ratecontrol_desc = "constant quantization parameter (CQP)";
+    } else if (avctx->rc_max_rate == avctx->bit_rate) {
+        q->param.mfx.RateControlMethod = MFX_RATECONTROL_CBR;
+        ratecontrol_desc = "constant bitrate (CBR)";
+    } else if (!avctx->rc_max_rate) {
+        q->param.mfx.RateControlMethod = MFX_RATECONTROL_AVBR;
+        ratecontrol_desc = "average variable bitrate (AVBR)";
+    } else {
+        q->param.mfx.RateControlMethod = MFX_RATECONTROL_VBR;
+        ratecontrol_desc = "variable bitrate (VBR)";
+    }
+
+    av_log(avctx, AV_LOG_VERBOSE, "Using the %s ratecontrol method\n", ratecontrol_desc);
+
+    switch (q->param.mfx.RateControlMethod) {
+    case MFX_RATECONTROL_CBR:
+    case MFX_RATECONTROL_VBR:
+        q->param.mfx.InitialDelayInKB = avctx->rc_initial_buffer_occupancy / 1000;
+        q->param.mfx.TargetKbps       = avctx->bit_rate / 1000;
+        q->param.mfx.MaxKbps          = avctx->bit_rate / 1000;
+        break;
+    case MFX_RATECONTROL_CQP:
+        quant = avctx->global_quality / FF_QP2LAMBDA;
+
+        q->param.mfx.QPI = av_clip(quant * fabs(avctx->i_quant_factor) + avctx->i_quant_offset, 0, 51);
+        q->param.mfx.QPP = av_clip(quant, 0, 51);
+        q->param.mfx.QPB = av_clip(quant * fabs(avctx->b_quant_factor) + avctx->b_quant_offset, 0, 51);
+
+        break;
+    case MFX_RATECONTROL_AVBR:
+        q->param.mfx.TargetKbps  = avctx->bit_rate / 1000;
+        q->param.mfx.Convergence = q->avbr_convergence;
+        q->param.mfx.Accuracy    = q->avbr_accuracy;
+        break;
+    }
+
+    q->extco.Header.BufferId      = MFX_EXTBUFF_CODING_OPTION;
+    q->extco.Header.BufferSz      = sizeof(q->extco);
+    q->extco.CAVLC                = avctx->coder_type == FF_CODER_TYPE_VLC ?
+                                    MFX_CODINGOPTION_ON : MFX_CODINGOPTION_UNKNOWN;
+
+    q->extparam[0] = (mfxExtBuffer *)&q->extco;
+
+    q->param.ExtParam    = q->extparam;
+    q->param.NumExtParam = FF_ARRAY_ELEMS(q->extparam);
+
+    return 0;
+}
+
+static int qsv_retrieve_enc_params(AVCodecContext *avctx, QSVEncContext *q)
+{
+    uint8_t sps_buf[128];
+    uint8_t pps_buf[128];
+
+    mfxExtCodingOptionSPSPPS extradata = {
+        .Header.BufferId = MFX_EXTBUFF_CODING_OPTION_SPSPPS,
+        .Header.BufferSz = sizeof(extradata),
+        .SPSBuffer = sps_buf, .SPSBufSize = sizeof(sps_buf),
+        .PPSBuffer = pps_buf, .PPSBufSize = sizeof(pps_buf)
+    };
+
+    mfxExtBuffer *ext_buffers[] = {
+        (mfxExtBuffer*)&extradata,
+    };
+
+    int ret;
+
+    q->param.ExtParam    = ext_buffers;
+    q->param.NumExtParam = FF_ARRAY_ELEMS(ext_buffers);
+
+    ret = MFXVideoENCODE_GetVideoParam(q->session, &q->param);
+    if (ret < 0)
+        return ff_qsv_error(ret);
+
+    q->packet_size = q->param.mfx.BufferSizeInKB * 1000;
+
+    if (!extradata.SPSBufSize || !extradata.PPSBufSize) {
+        av_log(avctx, AV_LOG_ERROR, "No extradata returned from libmfx.\n");
+        return AVERROR_UNKNOWN;
+    }
+
+    avctx->extradata = av_malloc(extradata.SPSBufSize + extradata.PPSBufSize +
+                                 FF_INPUT_BUFFER_PADDING_SIZE);
+    if (!avctx->extradata)
+        return AVERROR(ENOMEM);
+
+    memcpy(avctx->extradata,                        sps_buf, extradata.SPSBufSize);
+    memcpy(avctx->extradata + extradata.SPSBufSize, pps_buf, extradata.PPSBufSize);
+    avctx->extradata_size = extradata.SPSBufSize + extradata.PPSBufSize;
+    memset(avctx->extradata + avctx->extradata_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
+
+    return 0;
+}
+
+int ff_qsv_enc_init(AVCodecContext *avctx, QSVEncContext *q)
+{
+    int ret;
+
+    q->param.IOPattern  = MFX_IOPATTERN_IN_SYSTEM_MEMORY;
+    q->param.AsyncDepth = q->async_depth;
+
+    if (avctx->hwaccel_context) {
+        AVQSVContext *qsv = avctx->hwaccel_context;
+
+        q->session         = qsv->session;
+        q->param.IOPattern = qsv->iopattern;
+    }
+
+    if (!q->session) {
+        ret = ff_qsv_init_internal_session(avctx, &q->internal_session);
+        if (ret < 0)
+            return ret;
+
+        q->session = q->internal_session;
+    }
+
+    ret = init_video_param(avctx, q);
+    if (ret < 0)
+        return ret;
+
+    ret = MFXVideoENCODE_QueryIOSurf(q->session, &q->param, &q->req);
+    if (ret < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Error querying the encoding parameters\n");
+        return ff_qsv_error(ret);
+    }
+
+    ret = MFXVideoENCODE_Init(q->session, &q->param);
+    if (ret < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Error initializing the encoder\n");
+        return ff_qsv_error(ret);
+    }
+
+    ret = qsv_retrieve_enc_params(avctx, q);
+    if (ret < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Error retrieving encoding parameters.\n");
+        return ret;
+    }
+
+    avctx->coded_frame = av_frame_alloc();
+    if (!avctx->coded_frame)
+        return AVERROR(ENOMEM);
+
+    q->avctx = avctx;
+
+    return 0;
+}
+
+static void clear_unused_frames(QSVEncContext *q)
+{
+    QSVFrame *cur = q->work_frames;
+    while (cur) {
+        if (cur->surface && !cur->surface->Data.Locked) {
+            cur->surface = NULL;
+            av_frame_unref(cur->frame);
+        }
+        cur = cur->next;
+    }
+}
+
+static int get_free_frame(QSVEncContext *q, QSVFrame **f)
+{
+    QSVFrame *frame, **last;
+
+    clear_unused_frames(q);
+
+    frame = q->work_frames;
+    last  = &q->work_frames;
+    while (frame) {
+        if (!frame->surface) {
+            *f = frame;
+            return 0;
+        }
+
+        last  = &frame->next;
+        frame = frame->next;
+    }
+
+    frame = av_mallocz(sizeof(*frame));
+    if (!frame)
+        return AVERROR(ENOMEM);
+    frame->frame = av_frame_alloc();
+    if (!frame->frame) {
+        av_freep(&frame);
+        return AVERROR(ENOMEM);
+    }
+    *last = frame;
+
+    *f = frame;
+
+    return 0;
+}
+
+static int submit_frame(QSVEncContext *q, const AVFrame *frame,
+                        mfxFrameSurface1 **surface)
+{
+    QSVFrame *qf;
+    int ret;
+
+    ret = get_free_frame(q, &qf);
+    if (ret < 0)
+        return ret;
+
+    if (frame->format == AV_PIX_FMT_QSV) {
+        ret = av_frame_ref(qf->frame, frame);
+        if (ret < 0)
+            return ret;
+
+        qf->surface = (mfxFrameSurface1*)qf->frame->data[3];
+        *surface = qf->surface;
+        return 0;
+    }
+
+    /* make a copy if the input is not padded as libmfx requires */
+    if (frame->height & 31 || frame->linesize[0] & 15) {
+        qf->frame->height = FFALIGN(frame->height, 32);
+        qf->frame->width  = FFALIGN(frame->width, 16);
+
+        ret = ff_get_buffer(q->avctx, qf->frame, AV_GET_BUFFER_FLAG_REF);
+        if (ret < 0)
+            return ret;
+
+        qf->frame->height = frame->height;
+        qf->frame->width  = frame->width;
+        ret = av_frame_copy(qf->frame, frame);
+        if (ret < 0) {
+            av_frame_unref(qf->frame);
+            return ret;
+        }
+    } else {
+        ret = av_frame_ref(qf->frame, frame);
+        if (ret < 0)
+            return ret;
+    }
+
+    qf->surface_internal.Info = q->param.mfx.FrameInfo;
+
+    qf->surface_internal.Info.PicStruct =
+        !frame->interlaced_frame ? MFX_PICSTRUCT_PROGRESSIVE :
+        frame->top_field_first   ? MFX_PICSTRUCT_FIELD_TFF :
+                                   MFX_PICSTRUCT_FIELD_BFF;
+    if (frame->repeat_pict == 1)
+        qf->surface_internal.Info.PicStruct |= MFX_PICSTRUCT_FIELD_REPEATED;
+    else if (frame->repeat_pict == 2)
+        qf->surface_internal.Info.PicStruct |= MFX_PICSTRUCT_FRAME_DOUBLING;
+    else if (frame->repeat_pict == 4)
+        qf->surface_internal.Info.PicStruct |= MFX_PICSTRUCT_FRAME_TRIPLING;
+
+    qf->surface_internal.Data.PitchLow  = qf->frame->linesize[0];
+    qf->surface_internal.Data.Y         = qf->frame->data[0];
+    qf->surface_internal.Data.UV        = qf->frame->data[1];
+    qf->surface_internal.Data.TimeStamp = av_rescale_q(frame->pts, q->avctx->time_base, (AVRational){1, 90000});
+
+    qf->surface = &qf->surface_internal;
+
+    *surface = qf->surface;
+
+    return 0;
+}
+
+static void print_interlace_msg(AVCodecContext *avctx, QSVEncContext *q)
+{
+    if (q->param.mfx.CodecId == MFX_CODEC_AVC) {
+        if (q->param.mfx.CodecProfile == MFX_PROFILE_AVC_BASELINE ||
+            q->param.mfx.CodecLevel < MFX_LEVEL_AVC_21 ||
+            q->param.mfx.CodecLevel > MFX_LEVEL_AVC_41)
+            av_log(avctx, AV_LOG_WARNING,
+                   "Interlaced coding is supported"
+                   " at Main/High Profile Level 2.1-4.1\n");
+    }
+}
+
+int ff_qsv_encode(AVCodecContext *avctx, QSVEncContext *q,
+                  AVPacket *pkt, const AVFrame *frame, int *got_packet)
+{
+    mfxBitstream bs = { { { 0 } } };
+
+    mfxFrameSurface1 *surf = NULL;
+    mfxSyncPoint sync      = NULL;
+    int ret;
+
+    if (frame) {
+        ret = submit_frame(q, frame, &surf);
+        if (ret < 0) {
+            av_log(avctx, AV_LOG_ERROR, "Error submitting the frame for encoding.\n");
+            return ret;
+        }
+    }
+
+    ret = ff_alloc_packet(pkt, q->packet_size);
+    if (ret < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Error allocating the output packet\n");
+        return ret;
+    }
+    bs.Data      = pkt->data;
+    bs.MaxLength = pkt->size;
+
+    do {
+        ret = MFXVideoENCODE_EncodeFrameAsync(q->session, NULL, surf, &bs, &sync);
+        if (ret == MFX_WRN_DEVICE_BUSY)
+            av_usleep(1);
+    } while (ret > 0);
+
+    if (ret < 0)
+        return (ret == MFX_ERR_MORE_DATA) ? 0 : ff_qsv_error(ret);
+
+    if (ret == MFX_WRN_INCOMPATIBLE_VIDEO_PARAM && frame->interlaced_frame)
+        print_interlace_msg(avctx, q);
+
+    if (sync) {
+        MFXVideoCORE_SyncOperation(q->session, sync, 60000);
+
+        if (bs.FrameType & MFX_FRAMETYPE_I || bs.FrameType & MFX_FRAMETYPE_xI)
+            avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
+        else if (bs.FrameType & MFX_FRAMETYPE_P || bs.FrameType & MFX_FRAMETYPE_xP)
+            avctx->coded_frame->pict_type = AV_PICTURE_TYPE_P;
+        else if (bs.FrameType & MFX_FRAMETYPE_B || bs.FrameType & MFX_FRAMETYPE_xB)
+            avctx->coded_frame->pict_type = AV_PICTURE_TYPE_B;
+
+        pkt->dts  = av_rescale_q(bs.DecodeTimeStamp, (AVRational){1, 90000}, avctx->time_base);
+        pkt->pts  = av_rescale_q(bs.TimeStamp,       (AVRational){1, 90000}, avctx->time_base);
+        pkt->size = bs.DataLength;
+
+        if (bs.FrameType & MFX_FRAMETYPE_IDR ||
+            bs.FrameType & MFX_FRAMETYPE_xIDR)
+            pkt->flags |= AV_PKT_FLAG_KEY;
+
+        *got_packet = 1;
+    }
+
+    return 0;
+}
+
+int ff_qsv_enc_close(AVCodecContext *avctx, QSVEncContext *q)
+{
+    QSVFrame *cur;
+
+    MFXVideoENCODE_Close(q->session);
+    if (q->internal_session)
+        MFXClose(q->internal_session);
+    q->session          = NULL;
+    q->internal_session = NULL;
+
+    cur = q->work_frames;
+    while (cur) {
+        q->work_frames = cur->next;
+        av_frame_free(&cur->frame);
+        av_freep(&cur);
+        cur = q->work_frames;
+    }
+
+    av_frame_free(&avctx->coded_frame);
+
+    return 0;
+}
diff --git a/libavcodec/qsvenc.h b/libavcodec/qsvenc.h
new file mode 100644
index 0000000..05d268a
--- /dev/null
+++ b/libavcodec/qsvenc.h
@@ -0,0 +1,68 @@
+/*
+ * Intel MediaSDK QSV encoder utility functions
+ *
+ * copyright (c) 2013 Yukinori Yamazoe
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_QSVENC_H
+#define AVCODEC_QSVENC_H
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <mfx/mfxvideo.h>
+
+#include "libavutil/avutil.h"
+
+#include "avcodec.h"
+#include "qsv_internal.h"
+
+typedef struct QSVEncContext {
+    AVCodecContext *avctx;
+
+    QSVFrame *work_frames;
+
+    mfxSession session;
+    mfxSession internal_session;
+
+    int packet_size;
+
+    mfxVideoParam param;
+    mfxFrameAllocRequest req;
+
+    mfxExtCodingOption  extco;
+    mfxExtBuffer *extparam[1];
+
+    // options set by the caller
+    int async_depth;
+    int idr_interval;
+    int profile;
+    int preset;
+    int avbr_accuracy;
+    int avbr_convergence;
+} QSVEncContext;
+
+int ff_qsv_enc_init(AVCodecContext *avctx, QSVEncContext *q);
+
+int ff_qsv_encode(AVCodecContext *avctx, QSVEncContext *q,
+                  AVPacket *pkt, const AVFrame *frame, int *got_packet);
+
+int ff_qsv_enc_close(AVCodecContext *avctx, QSVEncContext *q);
+
+#endif /* AVCODEC_QSVENC_H */
diff --git a/libavcodec/qsvenc_h264.c b/libavcodec/qsvenc_h264.c
new file mode 100644
index 0000000..441ede8
--- /dev/null
+++ b/libavcodec/qsvenc_h264.c
@@ -0,0 +1,121 @@
+/*
+ * Intel MediaSDK QSV based H.264 enccoder
+ *
+ * copyright (c) 2013 Yukinori Yamazoe
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <mfx/mfxvideo.h>
+
+#include "libavutil/opt.h"
+
+#include "avcodec.h"
+#include "internal.h"
+#include "h264.h"
+#include "qsv.h"
+#include "qsv_internal.h"
+#include "qsvenc.h"
+
+typedef struct QSVH264EncContext {
+    AVClass *class;
+    QSVEncContext qsv;
+} QSVH264EncContext;
+
+static av_cold int qsv_enc_init(AVCodecContext *avctx)
+{
+    QSVH264EncContext *q = avctx->priv_data;
+
+    return ff_qsv_enc_init(avctx, &q->qsv);
+}
+
+static int qsv_enc_frame(AVCodecContext *avctx, AVPacket *pkt,
+                         const AVFrame *frame, int *got_packet)
+{
+    QSVH264EncContext *q = avctx->priv_data;
+
+    return ff_qsv_encode(avctx, &q->qsv, pkt, frame, got_packet);
+}
+
+static av_cold int qsv_enc_close(AVCodecContext *avctx)
+{
+    QSVH264EncContext *q = avctx->priv_data;
+
+    return ff_qsv_enc_close(avctx, &q->qsv);
+}
+
+#define OFFSET(x) offsetof(QSVH264EncContext, x)
+#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
+static const AVOption options[] = {
+    { "async_depth", "Maximum processing parallelism", OFFSET(qsv.async_depth), AV_OPT_TYPE_INT, { .i64 = ASYNC_DEPTH_DEFAULT }, 0, INT_MAX, VE },
+    { "idr_interval", "Distance (in I-frames) between IDR frames", OFFSET(qsv.idr_interval), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE },
+    { "avbr_accuracy",    "Accuracy of the AVBR ratecontrol",    OFFSET(qsv.avbr_accuracy),    AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE },
+    { "avbr_convergence", "Convergence of the AVBR ratecontrol", OFFSET(qsv.avbr_convergence), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE },
+
+    { "profile", NULL, OFFSET(qsv.profile), AV_OPT_TYPE_INT, { .i64 = MFX_PROFILE_UNKNOWN }, 0, INT_MAX, VE, "profile" },
+    { "unknown" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_UNKNOWN      }, INT_MIN, INT_MAX,     VE, "profile" },
+    { "baseline", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_AVC_BASELINE }, INT_MIN, INT_MAX,     VE, "profile" },
+    { "main"    , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_AVC_MAIN     }, INT_MIN, INT_MAX,     VE, "profile" },
+    { "high"    , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_AVC_HIGH     }, INT_MIN, INT_MAX,     VE, "profile" },
+
+    { "preset", NULL, OFFSET(qsv.preset), AV_OPT_TYPE_INT, { .i64 = MFX_TARGETUSAGE_BALANCED }, 0, 7,   VE, "preset" },
+    { "fast",   NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_TARGETUSAGE_BEST_SPEED  },   INT_MIN, INT_MAX, VE, "preset" },
+    { "medium", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_TARGETUSAGE_BALANCED  },     INT_MIN, INT_MAX, VE, "preset" },
+    { "slow",   NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_TARGETUSAGE_BEST_QUALITY  }, INT_MIN, INT_MAX, VE, "preset" },
+
+    { NULL },
+};
+
+static const AVClass class = {
+    .class_name = "h264_qsv encoder",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+static const AVCodecDefault qsv_enc_defaults[] = {
+    { "b",         "1M"    },
+    { "refs",      "0"     },
+    // same as the x264 default
+    { "g",         "250"   },
+    { "bf",        "3"     },
+    { "coder",     "ac"    },
+
+    { "flags",     "+cgop" },
+    { NULL },
+};
+
+AVCodec ff_h264_qsv_encoder = {
+    .name           = "h264_qsv",
+    .long_name      = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (Intel Quick Sync Video acceleration)"),
+    .priv_data_size = sizeof(QSVH264EncContext),
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_H264,
+    .init           = qsv_enc_init,
+    .encode2        = qsv_enc_frame,
+    .close          = qsv_enc_close,
+    .capabilities   = CODEC_CAP_DELAY,
+    .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_NV12,
+                                                    AV_PIX_FMT_QSV,
+                                                    AV_PIX_FMT_NONE },
+    .priv_class     = &class,
+    .defaults       = qsv_enc_defaults,
+};
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 0d5408b..ecfd6d8 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -29,7 +29,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVCODEC_VERSION_MAJOR 56
-#define LIBAVCODEC_VERSION_MINOR 19
+#define LIBAVCODEC_VERSION_MINOR 20
 #define LIBAVCODEC_VERSION_MICRO  0
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \