lavc: add Intel libmfx-based MPEG2 encoder

Changelog

@@ -38,6 +38,7 @@ version <next>:
 - DirectDraw Surface image/texture decoder
 - rewritten ASF demuxer
 - Go2Meeting decoding support
+- Intel QSV-accelerated MPEG-2 video encoding
 
 
 version 11:

configure

@@ -1907,6 +1907,7 @@ mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
 mpeg1video_encoder_select="aandcttables mpegvideoenc"
 mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
 mpeg2video_encoder_select="aandcttables mpegvideoenc"
+mpeg2_qsv_encoder_select="qsvenc"
 mpeg4_decoder_select="h263_decoder mpeg4video_parser"
 mpeg4_encoder_select="h263_encoder"
 msmpeg4v1_decoder_select="h263_decoder"

libavcodec/Makefile

@@ -299,6 +299,7 @@ OBJS-$(CONFIG_MPEG1VIDEO_DECODER)      += mpeg12dec.o mpeg12.o mpeg12data.o
 OBJS-$(CONFIG_MPEG1VIDEO_ENCODER)      += mpeg12enc.o mpeg12.o
 OBJS-$(CONFIG_MPEG2VIDEO_DECODER)      += mpeg12dec.o mpeg12.o mpeg12data.o
 OBJS-$(CONFIG_MPEG2VIDEO_ENCODER)      += mpeg12enc.o mpeg12.o
+OBJS-$(CONFIG_MPEG2_QSV_ENCODER)       += qsvenc_mpeg2.o
 OBJS-$(CONFIG_MPEG4_DECODER)           += xvididct.o
 OBJS-$(CONFIG_MSMPEG4V1_DECODER)       += msmpeg4dec.o msmpeg4.o msmpeg4data.o
 OBJS-$(CONFIG_MSMPEG4V2_DECODER)       += msmpeg4dec.o msmpeg4.o msmpeg4data.o

libavcodec/allcodecs.c

@@ -484,6 +484,7 @@ void avcodec_register_all(void)
     REGISTER_ENCODER(H264_NVENC,        h264_nvenc);
     REGISTER_ENCODER(H264_QSV,          h264_qsv);
     REGISTER_ENCODER(HEVC_NVENC,        hevc_nvenc);
+    REGISTER_ENCODER(MPEG2_QSV,         mpeg2_qsv);
 
     /* parsers */
     REGISTER_PARSER(AAC,                aac);

libavcodec/qsvenc.c

@@ -153,6 +153,7 @@ static int qsv_retrieve_enc_params(AVCodecContext *avctx, QSVEncContext *q)
         (mfxExtBuffer*)&extradata,
     };
 
+    int need_pps = avctx->codec_id != AV_CODEC_ID_MPEG2VIDEO;
     int ret;
 
     q->param.ExtParam    = ext_buffers;
@@ -164,19 +165,20 @@ static int qsv_retrieve_enc_params(AVCodecContext *avctx, QSVEncContext *q)
 
     q->packet_size = q->param.mfx.BufferSizeInKB * 1000;
 
-    if (!extradata.SPSBufSize || !extradata.PPSBufSize) {
+    if (!extradata.SPSBufSize || (need_pps && !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 +
+    avctx->extradata = av_malloc(extradata.SPSBufSize + need_pps * 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;
+    if (need_pps)
+        memcpy(avctx->extradata + extradata.SPSBufSize, pps_buf, extradata.PPSBufSize);
+    avctx->extradata_size = extradata.SPSBufSize + need_pps * extradata.PPSBufSize;
     memset(avctx->extradata + avctx->extradata_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
 
     return 0;

libavcodec/qsvenc_mpeg2.c

@@ -0,0 +1,117 @@
+/*
+ * Intel MediaSDK QSV based MPEG-2 encoder
+ *
+ * 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/common.h"
+#include "libavutil/opt.h"
+
+#include "avcodec.h"
+#include "internal.h"
+#include "qsv.h"
+#include "qsv_internal.h"
+#include "qsvenc.h"
+
+typedef struct QSVMpeg2EncContext {
+    AVClass *class;
+    QSVEncContext qsv;
+} QSVMpeg2EncContext;
+
+static av_cold int qsv_enc_init(AVCodecContext *avctx)
+{
+    QSVMpeg2EncContext *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)
+{
+    QSVMpeg2EncContext *q = avctx->priv_data;
+
+    return ff_qsv_encode(avctx, &q->qsv, pkt, frame, got_packet);
+}
+
+static av_cold int qsv_enc_close(AVCodecContext *avctx)
+{
+    QSVMpeg2EncContext *q = avctx->priv_data;
+
+    return ff_qsv_enc_close(avctx, &q->qsv);
+}
+
+#define OFFSET(x) offsetof(QSVMpeg2EncContext, 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 },
+    { "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" },
+    { "simple",  NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_MPEG2_SIMPLE   }, INT_MIN, INT_MAX,     VE, "profile" },
+    { "main",    NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_MPEG2_MAIN     }, INT_MIN, INT_MAX,     VE, "profile" },
+    { "high",    NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_MPEG2_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 = "mpeg2_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"     },
+
+    { "flags",     "+cgop" },
+    { NULL },
+};
+
+AVCodec ff_mpeg2_qsv_encoder = {
+    .name           = "mpeg2_qsv",
+    .long_name      = NULL_IF_CONFIG_SMALL("MPEG-2 video (Intel Quick Sync Video acceleration)"),
+    .priv_data_size = sizeof(QSVMpeg2EncContext),
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_MPEG2VIDEO,
+    .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,
+};