[x265] cli: unify x265 log function

[Xinyue Lu]

# HG changeset patch
# User Xinyue Lu <i at 7086.in>
# Date 1427969739 25200
#      Thu Apr 02 03:15:39 2015 -0700
# Branch Yuuki
# Node ID b0e4b7b87ea4c8178473dec1c8a11e6abef66ab5
# Parent  8cdf6fb6a335071dc0fc29510dbb8c0c7d301ee8
cli: unify x265 log function

diff -r 8cdf6fb6a335 -r b0e4b7b87ea4 source/common/common.cpp
--- a/source/common/common.cpp	Thu Apr 02 02:03:29 2015 -0700
+++ b/source/common/common.cpp	Thu Apr 02 03:15:39 2015 -0700
@@ -100,11 +100,14 @@
      return (x265_exp2_lut[i & 63] + 256) << (i >> 6) >> 8;
  }

-void x265_log(const x265_param *param, int level, const char *fmt, ...)
+void general_log(const x265_param* param, const char* caller, int level, const char* fmt, ...)
  {
      if (param && level > param->logLevel)
          return;
-    const char *log_level;
+    const int bufferSize = 4096;
+    char buffer[bufferSize];
+    int p = 0;
+    const char* log_level;
      switch (level)
      {
      case X265_LOG_ERROR:
@@ -127,11 +130,14 @@
          break;
      }

-    fprintf(stderr, "x265 [%s]: ", log_level);
+    if (caller)
+        p += sprintf(buffer, "%-4s [%s]: ", caller, log_level);
      va_list arg;
      va_start(arg, fmt);
-    vfprintf(stderr, fmt, arg);
+    vsnprintf(buffer + p, bufferSize - p, fmt, arg);
      va_end(arg);
+    if (!(param && level > param->logLevel))
+        fputs(buffer, stderr);
  }

  double x265_ssim2dB(double ssim)
diff -r 8cdf6fb6a335 -r b0e4b7b87ea4 source/common/common.h
--- a/source/common/common.h	Thu Apr 02 02:03:29 2015 -0700
+++ b/source/common/common.h	Thu Apr 02 03:15:39 2015 -0700
@@ -413,7 +413,8 @@

  /* outside x265 namespace, but prefixed. defined in common.cpp */
  int64_t  x265_mdate(void);
-void     x265_log(const x265_param *param, int level, const char *fmt, ...);
+#define  x265_log(param, ...) general_log(param, "x265", __VA_ARGS__)
+void     general_log(const x265_param* param, const char* caller, int level, const char* fmt, ...);
  int      x265_exp2fix8(double x);

  double   x265_ssim2dB(double ssim);
diff -r 8cdf6fb6a335 -r b0e4b7b87ea4 source/x265.cpp
--- a/source/x265.cpp	Thu Apr 02 02:03:29 2015 -0700
+++ b/source/x265.cpp	Thu Apr 02 03:15:39 2015 -0700
@@ -388,7 +388,7 @@
          else
              sprintf(buf + p, " frames %u - %d of %d", this->seek, this->seek + this->framesToBeEncoded - 1, 
info.frameCount);

-        fprintf(stderr, "%s  [info]: %s\n", input->getName(), buf);
+        general_log(param, input->getName(), X265_LOG_INFO, "%s\n", buf);
      }

      this->input->startReader();
@@ -618,25 +618,27 @@
      cliopt.bitstreamFile.close();

      if (b_ctrl_c)
-        fprintf(stderr, "aborted at input frame %d, output frame %d\n",
-                cliopt.seek + inFrameCount, stats.encodedPictureCount);
+        general_log(param, NULL, X265_LOG_INFO, "aborted at input frame %d, output frame %d\n",
+                    cliopt.seek + inFrameCount, stats.encodedPictureCount);

      if (stats.encodedPictureCount)
      {
-        printf("\nencoded %d frames in %.2fs (%.2f fps), %.2f kb/s", stats.encodedPictureCount,
-               stats.elapsedEncodeTime, stats.encodedPictureCount / stats.elapsedEncodeTime, stats.bitrate);
+        char buffer[4096];
+        int p = sprintf(buffer, "\nencoded %d frames in %.2fs (%.2f fps), %.2f kb/s", stats.encodedPictureCount,
+                        stats.elapsedEncodeTime, stats.encodedPictureCount / stats.elapsedEncodeTime, stats.bitrate);

          if (param->bEnablePsnr)
-            printf(", Global PSNR: %.3f", stats.globalPsnr);
+            p += sprintf(buffer + p, ", Global PSNR: %.3f", stats.globalPsnr);

          if (param->bEnableSsim)
-            printf(", SSIM Mean Y: %.7f (%6.3f dB)", stats.globalSsim, x265_ssim2dB(stats.globalSsim));
+            p += sprintf(buffer + p, ", SSIM Mean Y: %.7f (%6.3f dB)", stats.globalSsim, x265_ssim2dB(stats.globalSsim));

-        printf("\n");
+        sprintf(buffer + p, "\n");
+        general_log(param, NULL, X265_LOG_INFO, buffer);
      }
      else
      {
-        printf("\nencoded 0 frames\n");
+        general_log(param, NULL, X265_LOG_INFO, "\nencoded 0 frames\n");
      }

      x265_cleanup(); /* Free library singletons */