twopass_encoder: Add frame limit argument. - Remove twopass_encoder test TODO re frame limit. - Enable VP9 twopass_encoder test. Change-Id: I0649f15aabef79a63891e997fd20b212af5672e6

diff --git a/examples/twopass_encoder.c b/examples/twopass_encoder.c
index aecc11d..15a6617 100644
--- a/examples/twopass_encoder.c
+++ b/examples/twopass_encoder.c

@@ -59,7 +59,9 @@
 static const char *exec_name;
 
 void usage_exit(void) {
-  fprintf(stderr, "Usage: %s <codec> <width> <height> <infile> <outfile>\n",
+  fprintf(stderr,
+          "Usage: %s <codec> <width> <height> <infile> <outfile> "
+              "<frame limit>\n",
           exec_name);
   exit(EXIT_FAILURE);
 }
@@ -129,7 +131,8 @@
 static vpx_fixed_buf_t pass0(vpx_image_t *raw,
                              FILE *infile,
                              const VpxInterface *encoder,
-                             const vpx_codec_enc_cfg_t *cfg) {
+                             const vpx_codec_enc_cfg_t *cfg,
+                             int max_frames) {
   vpx_codec_ctx_t codec;
   int frame_count = 0;
   vpx_fixed_buf_t stats = {NULL, 0};
@@ -142,6 +145,8 @@
     ++frame_count;
     get_frame_stats(&codec, raw, frame_count, 1, 0, VPX_DL_GOOD_QUALITY,
                     &stats);
+    if (max_frames > 0 && frame_count >= max_frames)
+      break;
   }
 
   // Flush encoder.
@@ -159,7 +164,8 @@
                   FILE *infile,
                   const char *outfile_name,
                   const VpxInterface *encoder,
-                  const vpx_codec_enc_cfg_t *cfg) {
+                  const vpx_codec_enc_cfg_t *cfg,
+                  int max_frames) {
   VpxVideoInfo info = {
     encoder->fourcc,
     cfg->g_w,
@@ -181,6 +187,9 @@
   while (vpx_img_read(raw, infile)) {
     ++frame_count;
     encode_frame(&codec, raw, frame_count, 1, 0, VPX_DL_GOOD_QUALITY, writer);
+
+    if (max_frames > 0 && frame_count >= max_frames)
+      break;
   }
 
   // Flush encoder.
@@ -213,11 +222,14 @@
   const char *const height_arg = argv[3];
   const char *const infile_arg = argv[4];
   const char *const outfile_arg = argv[5];
+  int max_frames = 0;
   exec_name = argv[0];
 
-  if (argc != 6)
+  if (argc != 7)
     die("Invalid number of arguments.");
 
+  max_frames = strtol(argv[6], NULL, 0);
+
   encoder = get_vpx_encoder_by_name(codec_arg);
   if (!encoder)
     die("Unsupported codec.");
@@ -249,13 +261,13 @@
 
   // Pass 0
   cfg.g_pass = VPX_RC_FIRST_PASS;
-  stats = pass0(&raw, infile, encoder, &cfg);
+  stats = pass0(&raw, infile, encoder, &cfg, max_frames);
 
   // Pass 1
   rewind(infile);
   cfg.g_pass = VPX_RC_LAST_PASS;
   cfg.rc_twopass_stats_in = stats;
-  pass1(&raw, infile, outfile_arg, encoder, &cfg);
+  pass1(&raw, infile, outfile_arg, encoder, &cfg, max_frames);
   free(stats.buf);
 
   vpx_img_free(&raw);

diff --git a/test/twopass_encoder.sh b/test/twopass_encoder.sh
index 1189e51..7a223f2 100755
--- a/test/twopass_encoder.sh
+++ b/test/twopass_encoder.sh

@@ -23,7 +23,8 @@
   fi
 }
 
-# Runs twopass_encoder using the codec specified by $1.
+# Runs twopass_encoder using the codec specified by $1 with a frame limit of
+# 100.
 twopass_encoder() {
   local encoder="${LIBVPX_BIN_PATH}/twopass_encoder${VPX_TEST_EXE_SUFFIX}"
   local codec="$1"
@@ -35,7 +36,7 @@
   fi
 
   eval "${VPX_TEST_PREFIX}" "${encoder}" "${codec}" "${YUV_RAW_INPUT_WIDTH}" \
-      "${YUV_RAW_INPUT_HEIGHT}" "${YUV_RAW_INPUT}" "${output_file}" \
+      "${YUV_RAW_INPUT_HEIGHT}" "${YUV_RAW_INPUT}" "${output_file}" 100 \
       ${devnull}
 
   [ -e "${output_file}" ] || return 1
@@ -47,16 +48,13 @@
   fi
 }
 
-# TODO(tomfinegan): Add a frame limit param to twopass_encoder and enable this
-# test. VP9 is just too slow right now: This test takes 31m16s+ on a fast
-# machine.
-DISABLED_twopass_encoder_vp9() {
+twopass_encoder_vp9() {
   if [ "$(vp9_encode_available)" = "yes" ]; then
     twopass_encoder vp9 || return 1
   fi
 }
 
 twopass_encoder_tests="twopass_encoder_vp8
-                       DISABLED_twopass_encoder_vp9"
+                       twopass_encoder_vp9"
 
 run_tests twopass_encoder_verify_environment "${twopass_encoder_tests}"