lavc: add an Intel libmfx-based H.264 decoder

Based on the code by Luca Barbato <lu_zero@gentoo.org> and Yukinori
Yamazoe <drocon11@gmail.com>.

1 files changed, 362 insertions, 0 deletions

diff --git a/libavcodec/qsv.c b/libavcodec/qsv.c
new file mode 100644
index 0000000000..3b2a75b150
--- /dev/null
+++ b/libavcodec/qsv.c
@@ -0,0 +1,362 @@
+/*
+ * Intel MediaSDK QSV codec-independent code
+ *
+ * copyright (c) 2013 Luca Barbato
+ * copyright (c) 2015 Anton Khirnov <anton@khirnov.net>
+ *
+ * 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/pixfmt.h"
+#include "libavutil/time.h"
+
+#include "avcodec.h"
+#include "internal.h"
+#include "qsv_internal.h"
+
+int ff_qsv_error(int mfx_err)
+{
+    switch (mfx_err) {
+    case MFX_ERR_NONE:
+        return 0;
+    case MFX_ERR_MEMORY_ALLOC:
+    case MFX_ERR_NOT_ENOUGH_BUFFER:
+        return AVERROR(ENOMEM);
+    case MFX_ERR_INVALID_HANDLE:
+        return AVERROR(EINVAL);
+    case MFX_ERR_DEVICE_FAILED:
+    case MFX_ERR_DEVICE_LOST:
+    case MFX_ERR_LOCK_MEMORY:
+        return AVERROR(EIO);
+    case MFX_ERR_NULL_PTR:
+    case MFX_ERR_UNDEFINED_BEHAVIOR:
+    case MFX_ERR_NOT_INITIALIZED:
+        return AVERROR_BUG;
+    case MFX_ERR_UNSUPPORTED:
+    case MFX_ERR_NOT_FOUND:
+        return AVERROR(ENOSYS);
+    case MFX_ERR_MORE_DATA:
+    case MFX_ERR_MORE_SURFACE:
+    case MFX_ERR_MORE_BITSTREAM:
+        return AVERROR(EAGAIN);
+    case MFX_ERR_INCOMPATIBLE_VIDEO_PARAM:
+    case MFX_ERR_INVALID_VIDEO_PARAM:
+        return AVERROR(EINVAL);
+    case MFX_ERR_ABORTED:
+    case MFX_ERR_UNKNOWN:
+    default:
+        return AVERROR_UNKNOWN;
+    }
+}
+
+int ff_qsv_map_pixfmt(enum AVPixelFormat format)
+{
+    switch (format) {
+    case AV_PIX_FMT_YUV420P:
+    case AV_PIX_FMT_YUVJ420P:
+        return AV_PIX_FMT_NV12;
+    default:
+        return AVERROR(ENOSYS);
+    }
+}
+
+static int codec_id_to_mfx(enum AVCodecID codec_id)
+{
+    switch (codec_id) {
+    case AV_CODEC_ID_H264:
+        return MFX_CODEC_AVC;
+    case AV_CODEC_ID_MPEG1VIDEO:
+    case AV_CODEC_ID_MPEG2VIDEO:
+        return MFX_CODEC_MPEG2;
+    case AV_CODEC_ID_VC1:
+        return MFX_CODEC_VC1;
+    default:
+        break;
+    }
+
+    return AVERROR(ENOSYS);
+}
+
+static int qsv_init_session(AVCodecContext *avctx, QSVContext *q, mfxSession session)
+{
+    if (!session) {
+        if (!q->internal_session) {
+            mfxIMPL impl   = MFX_IMPL_AUTO_ANY;
+            mfxVersion ver = { { QSV_VERSION_MINOR, QSV_VERSION_MAJOR } };
+
+            const char *desc;
+            int ret;
+
+            ret = MFXInit(impl, &ver, &q->internal_session);
+            if (ret < 0) {
+                av_log(avctx, AV_LOG_ERROR, "Error initializing an internal MFX session\n");
+                return ff_qsv_error(ret);
+            }
+
+            MFXQueryIMPL(q->internal_session, &impl);
+
+            if (impl & MFX_IMPL_SOFTWARE)
+                desc = "software";
+            else if (impl & MFX_IMPL_HARDWARE)
+                desc = "hardware accelerated";
+            else
+                desc = "unknown";
+
+            av_log(avctx, AV_LOG_VERBOSE,
+                   "Initialized an internal MFX session using %s implementation\n",
+                   desc);
+        }
+
+        q->session = q->internal_session;
+    } else {
+        q->session = session;
+    }
+
+    /* make sure the decoder is uninitialized */
+    MFXVideoDECODE_Close(q->session);
+
+    return 0;
+}
+
+int ff_qsv_init(AVCodecContext *avctx, QSVContext *q, mfxSession session)
+{
+    mfxVideoParam param = { { 0 } };
+    int ret;
+
+    ret = qsv_init_session(avctx, q, session);
+    if (ret < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Error initializing an MFX session\n");
+        return ret;
+    }
+
+
+    ret = codec_id_to_mfx(avctx->codec_id);
+    if (ret < 0)
+        return ret;
+
+    param.mfx.CodecId      = ret;
+    param.mfx.CodecProfile = avctx->profile;
+    param.mfx.CodecLevel   = avctx->level;
+
+    param.mfx.FrameInfo.BitDepthLuma   = 8;
+    param.mfx.FrameInfo.BitDepthChroma = 8;
+    param.mfx.FrameInfo.Shift          = 0;
+    param.mfx.FrameInfo.FourCC         = MFX_FOURCC_NV12;
+    param.mfx.FrameInfo.Width          = avctx->coded_width;
+    param.mfx.FrameInfo.Height         = avctx->coded_height;
+    param.mfx.FrameInfo.ChromaFormat   = MFX_CHROMAFORMAT_YUV420;
+
+    param.IOPattern   = q->iopattern;
+    param.AsyncDepth  = q->async_depth;
+    param.ExtParam    = q->ext_buffers;
+    param.NumExtParam = q->nb_ext_buffers;
+
+    ret = MFXVideoDECODE_Init(q->session, &param);
+    if (ret < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Error initializing the MFX video decoder\n");
+        return ff_qsv_error(ret);
+    }
+
+    return 0;
+}
+
+static int alloc_frame(AVCodecContext *avctx, QSVFrame *frame)
+{
+    int ret;
+
+    ret = ff_get_buffer(avctx, frame->frame, AV_GET_BUFFER_FLAG_REF);
+    if (ret < 0)
+        return ret;
+
+    if (frame->frame->format == AV_PIX_FMT_QSV) {
+        frame->surface = (mfxFrameSurface1*)frame->frame->data[3];
+    } else {
+        frame->surface_internal.Info.BitDepthLuma   = 8;
+        frame->surface_internal.Info.BitDepthChroma = 8;
+        frame->surface_internal.Info.FourCC         = MFX_FOURCC_NV12;
+        frame->surface_internal.Info.Width          = avctx->coded_width;
+        frame->surface_internal.Info.Height         = avctx->coded_height;
+        frame->surface_internal.Info.ChromaFormat   = MFX_CHROMAFORMAT_YUV420;
+
+        frame->surface_internal.Data.PitchLow = frame->frame->linesize[0];
+        frame->surface_internal.Data.Y        = frame->frame->data[0];
+        frame->surface_internal.Data.UV       = frame->frame->data[1];
+
+        frame->surface = &frame->surface_internal;
+    }
+
+    return 0;
+}
+
+static void qsv_clear_unused_frames(QSVContext *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_surface(AVCodecContext *avctx, QSVContext *q, mfxFrameSurface1 **surf)
+{
+    QSVFrame *frame, **last;
+    int ret;
+
+    qsv_clear_unused_frames(q);
+
+    frame = q->work_frames;
+    last  = &q->work_frames;
+    while (frame) {
+        if (!frame->surface) {
+            ret = alloc_frame(avctx, frame);
+            if (ret < 0)
+                return ret;
+            *surf = frame->surface;
+            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;
+
+    ret = alloc_frame(avctx, frame);
+    if (ret < 0)
+        return ret;
+
+    *surf = frame->surface;
+
+    return 0;
+}
+
+static AVFrame *find_frame(QSVContext *q, mfxFrameSurface1 *surf)
+{
+    QSVFrame *cur = q->work_frames;
+    while (cur) {
+        if (surf == cur->surface)
+            return cur->frame;
+        cur = cur->next;
+    }
+    return NULL;
+}
+
+int ff_qsv_decode(AVCodecContext *avctx, QSVContext *q,
+                  AVFrame *frame, int *got_frame,
+                  AVPacket *avpkt)
+{
+    mfxFrameSurface1 *insurf;
+    mfxFrameSurface1 *outsurf;
+    mfxSyncPoint sync;
+    mfxBitstream bs = { { { 0 } } };
+    int ret;
+
+    if (avpkt->size) {
+        bs.Data       = avpkt->data;
+        bs.DataLength = avpkt->size;
+        bs.MaxLength  = bs.DataLength;
+        bs.TimeStamp  = avpkt->pts;
+    }
+
+    do {
+        ret = get_surface(avctx, q, &insurf);
+        if (ret < 0)
+            return ret;
+
+        ret = MFXVideoDECODE_DecodeFrameAsync(q->session, avpkt->size ? &bs : NULL,
+                                              insurf, &outsurf, &sync);
+        if (ret == MFX_WRN_DEVICE_BUSY)
+            av_usleep(1);
+
+    } while (ret == MFX_WRN_DEVICE_BUSY || ret == MFX_ERR_MORE_SURFACE);
+
+    if (ret != MFX_ERR_NONE &&
+        ret != MFX_ERR_MORE_DATA &&
+        ret != MFX_WRN_VIDEO_PARAM_CHANGED &&
+        ret != MFX_ERR_MORE_SURFACE) {
+        av_log(avctx, AV_LOG_ERROR, "Error during QSV decoding.\n");
+        return ff_qsv_error(ret);
+    }
+
+    if (sync) {
+        AVFrame *src_frame;
+
+        MFXVideoCORE_SyncOperation(q->session, sync, 60000);
+
+        src_frame = find_frame(q, outsurf);
+        if (!src_frame) {
+            av_log(avctx, AV_LOG_ERROR,
+                   "The returned surface does not correspond to any frame\n");
+            return AVERROR_BUG;
+        }
+
+        ret = av_frame_ref(frame, src_frame);
+        if (ret < 0)
+            return ret;
+
+        frame->pkt_pts = frame->pts = outsurf->Data.TimeStamp;
+
+        frame->repeat_pict =
+            outsurf->Info.PicStruct & MFX_PICSTRUCT_FRAME_TRIPLING ? 4 :
+            outsurf->Info.PicStruct & MFX_PICSTRUCT_FRAME_DOUBLING ? 2 :
+            outsurf->Info.PicStruct & MFX_PICSTRUCT_FIELD_REPEATED ? 1 : 0;
+        frame->top_field_first =
+            outsurf->Info.PicStruct & MFX_PICSTRUCT_FIELD_TFF;
+        frame->interlaced_frame =
+            !(outsurf->Info.PicStruct & MFX_PICSTRUCT_PROGRESSIVE);
+
+        *got_frame = 1;
+    }
+
+    return bs.DataOffset;
+}
+
+int ff_qsv_close(QSVContext *q)
+{
+    QSVFrame *cur = q->work_frames;
+
+    while (cur) {
+        q->work_frames = cur->next;
+        av_frame_free(&cur->frame);
+        av_freep(&cur);
+        cur = q->work_frames;
+    }
+
+    if (q->internal_session)
+        MFXClose(q->internal_session);
+
+    return 0;
+}