libx264: add 'ssim' private option.

Deprecate CODEC_FLAG2_SSIM.

libavcodec/avcodec.h

@@ -623,7 +623,9 @@ typedef struct RcOverride{
 #define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
 #define CODEC_FLAG2_MBTREE        0x00040000 ///< Use macroblock tree ratecontrol (x264 only)
 #define CODEC_FLAG2_PSY           0x00080000 ///< Use psycho visual optimizations.
+#if FF_API_X264_GLOBAL_OPTS
 #define CODEC_FLAG2_SSIM          0x00100000 ///< Compute SSIM during encoding, error[] values are undefined.
+#endif
 #define CODEC_FLAG2_INTRA_REFRESH 0x00200000 ///< Use periodic insertion of intra blocks instead of keyframes.
 
 /* Unsupported options :

libavcodec/libx264.c

@@ -49,6 +49,7 @@ typedef struct X264Context {
     char *psy_rd;
     int rc_lookahead;
     int weightp;
+    int ssim;
 } X264Context;
 
 static void X264_log(void *p, int level, const char *fmt, va_list args)
@@ -323,6 +324,7 @@ static av_cold int X264_init(AVCodecContext *avctx)
         x4->params.rc.i_lookahead             = avctx->rc_lookahead;
     if (avctx->weighted_p_pred >= 0)
         x4->params.analyse.i_weighted_pred    = avctx->weighted_p_pred;
+    x4->params.analyse.b_ssim = avctx->flags2 & CODEC_FLAG2_SSIM;
 #endif
 
     if (x4->aq_mode >= 0)
@@ -338,6 +340,8 @@ static av_cold int X264_init(AVCodecContext *avctx)
     if (x4->weightp >= 0)
         x4->params.analyse.i_weighted_pred = x4->weightp;
 
+    if (x4->ssim >= 0)
+        x4->params.analyse.b_ssim = x4->ssim;
 
 
     if (x4->fastfirstpass)
@@ -357,7 +361,6 @@ static av_cold int X264_init(AVCodecContext *avctx)
     x4->params.i_fps_den = x4->params.i_timebase_num = avctx->time_base.num;
 
     x4->params.analyse.b_psnr = avctx->flags & CODEC_FLAG_PSNR;
-    x4->params.analyse.b_ssim = avctx->flags2 & CODEC_FLAG2_SSIM;
 
     x4->params.b_aud          = avctx->flags2 & CODEC_FLAG2_AUD;
 
@@ -426,6 +429,7 @@ static const AVOption options[] = {
     { "none",          NULL, 0, FF_OPT_TYPE_CONST, {X264_WEIGHTP_NONE},   INT_MIN, INT_MAX, VE, "weightp" },
     { "simple",        NULL, 0, FF_OPT_TYPE_CONST, {X264_WEIGHTP_SIMPLE}, INT_MIN, INT_MAX, VE, "weightp" },
     { "smart",         NULL, 0, FF_OPT_TYPE_CONST, {X264_WEIGHTP_SMART},  INT_MIN, INT_MAX, VE, "weightp" },
+    { "ssim",          "Calculate and print SSIM stats.",                 OFFSET(ssim),          FF_OPT_TYPE_INT,    {-1 }, -1, 1, VE },
     { NULL },
 };
 

libavcodec/options.c

@@ -445,8 +445,8 @@ static const AVOption options[]={
 {"aq_mode", "specify aq method", OFFSET(aq_mode), FF_OPT_TYPE_INT, {.dbl = -1 }, -1, INT_MAX, V|E},
 {"aq_strength", "specify aq strength", OFFSET(aq_strength), FF_OPT_TYPE_FLOAT, {.dbl = -1.0 }, -1, FLT_MAX, V|E},
 {"rc_lookahead", "specify number of frames to look ahead for frametype", OFFSET(rc_lookahead), FF_OPT_TYPE_INT, {.dbl = 40 }, 0, INT_MAX, V|E},
-#endif
 {"ssim", "ssim will be calculated during encoding", 0, FF_OPT_TYPE_CONST, {.dbl = CODEC_FLAG2_SSIM }, INT_MIN, INT_MAX, V|E, "flags2"},
+#endif
 {"intra_refresh", "use periodic insertion of intra blocks instead of keyframes", 0, FF_OPT_TYPE_CONST, {.dbl = CODEC_FLAG2_INTRA_REFRESH }, INT_MIN, INT_MAX, V|E, "flags2"},
 #if FF_API_X264_GLOBAL_OPTS
 {"crf_max", "in crf mode, prevents vbv from lowering quality beyond this point", OFFSET(crf_max), FF_OPT_TYPE_FLOAT, {.dbl = DEFAULT }, 0, 51, V|E},