vpxenc: add CQ_LEVEL mapping

via the equivalent AVCodecContext::crf modifying the range allowed by
options.c (0-51 -> 0-63)
update configure check to require libvpx 0.9.6 (Bali)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

configure

@@ -2910,8 +2910,8 @@ enabled libvorbis  && require  libvorbis vorbis/vorbisenc.h vorbis_info_init -lv
 enabled libvpx     && {
     enabled libvpx_decoder && { check_lib2 "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_dec_init_ver -lvpx ||
                                 die "ERROR: libvpx decoder version must be >=0.9.1"; }
-    enabled libvpx_encoder && { check_lib2 "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_enc_init_ver -lvpx ||
-                                die "ERROR: libvpx encoder version must be >=0.9.1"; } }
+    enabled libvpx_encoder && { check_lib2 "vpx/vpx_encoder.h vpx/vp8cx.h" "vpx_codec_enc_init_ver VPX_CQ" -lvpx ||
+                                die "ERROR: libvpx encoder version must be >=0.9.6"; } }
 enabled libx264    && require  libx264 x264.h x264_encoder_encode -lx264 &&
                       { check_cpp_condition x264.h "X264_BUILD >= 99" ||
                         die "ERROR: libx264 version must be >= 0.99."; }

libavcodec/libvpxenc.c

@@ -72,6 +72,7 @@ static const char *ctlidstr[] = {
     [VP8E_SET_ARNR_MAXFRAMES]    = "VP8E_SET_ARNR_MAXFRAMES",
     [VP8E_SET_ARNR_STRENGTH]     = "VP8E_SET_ARNR_STRENGTH",
     [VP8E_SET_ARNR_TYPE]         = "VP8E_SET_ARNR_TYPE",
+    [VP8E_SET_CQ_LEVEL]          = "VP8E_SET_CQ_LEVEL",
 };
 
 static av_cold void log_encoder_error(AVCodecContext *avctx, const char *desc)
@@ -234,6 +235,8 @@ static av_cold int vp8_init(AVCodecContext *avctx)
     if (avctx->rc_min_rate == avctx->rc_max_rate &&
         avctx->rc_min_rate == avctx->bit_rate)
         enccfg.rc_end_usage = VPX_CBR;
+    else if (avctx->crf)
+        enccfg.rc_end_usage = VPX_CQ;
     enccfg.rc_target_bitrate = av_rescale_rnd(avctx->bit_rate, 1, 1000,
                                               AV_ROUND_NEAR_INF);
 
@@ -312,6 +315,7 @@ static av_cold int vp8_init(AVCodecContext *avctx)
     codecctl_int(avctx, VP8E_SET_NOISE_SENSITIVITY, avctx->noise_reduction);
     codecctl_int(avctx, VP8E_SET_TOKEN_PARTITIONS,  av_log2(avctx->slices));
     codecctl_int(avctx, VP8E_SET_STATIC_THRESHOLD,  avctx->mb_threshold);
+    codecctl_int(avctx, VP8E_SET_CQ_LEVEL,          (int)avctx->crf);
 
     //provide dummy value to initialize wrapper, values will be updated each _encode()
     vpx_img_wrap(&ctx->rawimg, VPX_IMG_FMT_I420, avctx->width, avctx->height, 1,

libavcodec/options.c

@@ -367,7 +367,7 @@ static const AVOption options[]={
 {"all"             , NULL, 0, FF_OPT_TYPE_CONST, AVDISCARD_ALL    , INT_MIN, INT_MAX, V|D, "avdiscard"},
 {"bidir_refine", "refine the two motion vectors used in bidirectional macroblocks", OFFSET(bidir_refine), FF_OPT_TYPE_INT, 1, 0, 4, V|E},
 {"brd_scale", "downscales frames for dynamic B-frame decision", OFFSET(brd_scale), FF_OPT_TYPE_INT, DEFAULT, 0, 10, V|E},
-{"crf", "enables constant quality mode, and selects the quality (x264)", OFFSET(crf), FF_OPT_TYPE_FLOAT, DEFAULT, 0, 51, V|E},
+{"crf", "enables constant quality mode, and selects the quality (x264/VP8)", OFFSET(crf), FF_OPT_TYPE_FLOAT, DEFAULT, 0, 63, V|E},
 {"cqp", "constant quantization parameter rate control method", OFFSET(cqp), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, V|E},
 {"keyint_min", "minimum interval between IDR-frames (x264)", OFFSET(keyint_min), FF_OPT_TYPE_INT, 25, INT_MIN, INT_MAX, V|E},
 {"refs", "reference frames to consider for motion compensation (Snow)", OFFSET(refs), FF_OPT_TYPE_INT, 1, INT_MIN, INT_MAX, V|E},