vaapi_encode: Add MPEG-2 support

(cherry picked from commit ca6ae3b7)

Changelog

@@ -108,6 +108,7 @@ version 3.1:
 - libutvideo wrapper removed
 - YUY2 Lossless Codec decoder
 - VideoToolbox H.264 encoder
+- VAAPI-accelerated MPEG-2 encoding
 
 
 version 3.0:

configure

@@ -2768,6 +2768,8 @@ mpeg2_qsv_decoder_deps="libmfx"
 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel"
 mpeg2_qsv_encoder_deps="libmfx"
 mpeg2_qsv_encoder_select="qsvenc"
+mpeg2_vaapi_encoder_deps="VAEncPictureParameterBufferMPEG2"
+mpeg2_vaapi_encoder_select="vaapi_encode"
 mpeg4_cuvid_decoder_deps="cuda cuvid"
 mpeg4_cuvid_decoder_select="mpeg4_cuvid_hwaccel"
 nvenc_h264_encoder_deps="nvenc"
@@ -5653,6 +5655,7 @@ check_type "va/va.h va/va_vpp.h" "VAProcPipelineParameterBuffer"
 check_type "va/va.h va/va_enc_h264.h" "VAEncPictureParameterBufferH264"
 check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
 check_type "va/va.h va/va_enc_jpeg.h" "VAEncPictureParameterBufferJPEG"
+check_type "va/va.h va/va_enc_mpeg2.h" "VAEncPictureParameterBufferMPEG2"
 
 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
 

libavcodec/Makefile

@@ -413,6 +413,7 @@ OBJS-$(CONFIG_MPEG2_QSV_DECODER)       += qsvdec_mpeg2.o
 OBJS-$(CONFIG_MPEG2_QSV_ENCODER)       += qsvenc_mpeg2.o
 OBJS-$(CONFIG_MPEG2VIDEO_DECODER)      += mpeg12dec.o mpeg12.o mpeg12data.o
 OBJS-$(CONFIG_MPEG2VIDEO_ENCODER)      += mpeg12enc.o mpeg12.o
+OBJS-$(CONFIG_MPEG2_VAAPI_ENCODER)     += vaapi_encode_mpeg2.o
 OBJS-$(CONFIG_MPEG4_DECODER)           += xvididct.o
 OBJS-$(CONFIG_MPEG4_MEDIACODEC_DECODER) += mediacodecdec.o
 OBJS-$(CONFIG_MPEG4_OMX_ENCODER)       += omx.o

libavcodec/allcodecs.c

@@ -661,6 +661,7 @@ void avcodec_register_all(void)
     REGISTER_DECODER(MPEG1_CUVID,       mpeg1_cuvid);
     REGISTER_DECODER(MPEG2_CUVID,       mpeg2_cuvid);
     REGISTER_ENCODER(MPEG2_QSV,         mpeg2_qsv);
+    REGISTER_ENCODER(MPEG2_VAAPI,       mpeg2_vaapi);
     REGISTER_DECODER(MPEG4_CUVID,       mpeg4_cuvid);
     REGISTER_DECODER(MPEG4_MEDIACODEC,  mpeg4_mediacodec);
     REGISTER_DECODER(VC1_CUVID,         vc1_cuvid);

libavcodec/vaapi_encode.c

@@ -320,6 +320,7 @@ static int vaapi_encode_issue(AVCodecContext *avctx,
             err = AVERROR(ENOMEM);
             goto fail;
         }
+        slice->index = i;
         pic->slices[i] = slice;
 
         if (ctx->codec->slice_params_size > 0) {

libavcodec/vaapi_encode.h

@@ -35,8 +35,8 @@ enum {
     MAX_CONFIG_ATTRIBUTES  = 4,
     MAX_GLOBAL_PARAMS      = 4,
     MAX_PICTURE_REFERENCES = 2,
-    MAX_PICTURE_SLICES     = 1,
-    MAX_PARAM_BUFFERS      = 16,
+    MAX_PICTURE_SLICES     = 112,
+    MAX_PARAM_BUFFERS      = 128,
     MAX_REORDER_DELAY      = 16,
     MAX_PARAM_BUFFER_SIZE  = 1024,
 };
@@ -49,6 +49,7 @@ enum {
 };
 
 typedef struct VAAPIEncodeSlice {
+    int             index;
     void           *priv_data;
     void           *codec_slice_params;
 } VAAPIEncodeSlice;

libavcodec/version.h

@@ -28,7 +28,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVCODEC_VERSION_MAJOR  57
-#define LIBAVCODEC_VERSION_MINOR  75
+#define LIBAVCODEC_VERSION_MINOR  76
 #define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \