tests/fate: add a simple test for libx264

Since this is an external encoder not under our control, we cannot test
the encoded output exactly as is done for internal encoders. We can
still test however that the output is decodable and produces the
expected number of frames with expected dimensions, pixel formats, and
timestamps.

tests/Makefile

@@ -177,6 +177,7 @@ include $(SRC_PATH)/tests/fate/dpcm.mak
 include $(SRC_PATH)/tests/fate/dvvideo.mak
 include $(SRC_PATH)/tests/fate/ea.mak
 include $(SRC_PATH)/tests/fate/exif.mak
+include $(SRC_PATH)/tests/fate/enc_external.mak
 # Must be included after lavf-video.mak
 include $(SRC_PATH)/tests/fate/ffmpeg.mak
 include $(SRC_PATH)/tests/fate/ffprobe.mak

tests/fate-run.sh

@@ -282,6 +282,22 @@ stream_remux(){
         run ffprobe${PROGSUF}${EXECSUF} -bitexact $ffprobe_opts $tencfile || return
 }
 
+# this function is for testing external encoders,
+# where the precise output is not controlled by us
+# we can still test e.g. that the output can be decoded correctly
+enc_external(){
+    srcfile=$1
+    enc_fmt=$2
+    enc_opt=$3
+    probe_opt=$4
+
+    srcfile=$(target_path $srcfile)
+    encfile=$(target_path "${outdir}/${test}.${enc_fmt}")
+
+    ffmpeg -i $srcfile $enc_opt -f $enc_fmt -y $encfile || return
+    run ffprobe${PROGSUF}${EXECSUF} -bitexact $probe_opt $encfile || return
+}
+
 # FIXME: There is a certain duplication between the avconv-related helper
 # functions above and below that should be refactored.
 ffmpeg2="$target_exec ${target_path}/ffmpeg${PROGSUF}${EXECSUF}"

tests/fate/enc_external.mak

+FATE_ENC_EXTERNAL-$(call ENCDEC, LIBX264 H264, MOV, H264_DEMUXER) += fate-libx264-simple
+fate-libx264-simple: CMD = enc_external $(TARGET_SAMPLES)/h264-conformance/BA1_Sony_D.jsv \
+    mp4 "-c:v libx264" "-show_entries frame=width,height,pix_fmt,pts,pkt_dts -of flat"
+
+FATE_SAMPLES_FFMPEG_FFPROBE += $(FATE_ENC_EXTERNAL-yes)
+fate-enc-external: $(FATE_ENC_EXTERNAL-yes)

tests/ref/fate/libx264-simple

+frames.frame.0.pts=0
+frames.frame.0.pkt_dts=0
+frames.frame.0.width=176
+frames.frame.0.height=144
+frames.frame.0.pix_fmt="yuv420p"
+frames.frame.1.pts=512
+frames.frame.1.pkt_dts=512
+frames.frame.1.width=176
+frames.frame.1.height=144
+frames.frame.1.pix_fmt="yuv420p"
+frames.frame.2.pts=1024
+frames.frame.2.pkt_dts=1024
+frames.frame.2.width=176
+frames.frame.2.height=144
+frames.frame.2.pix_fmt="yuv420p"
+frames.frame.3.pts=1536
+frames.frame.3.pkt_dts=1536
+frames.frame.3.width=176
+frames.frame.3.height=144
+frames.frame.3.pix_fmt="yuv420p"
+frames.frame.4.pts=2048
+frames.frame.4.pkt_dts=2048
+frames.frame.4.width=176
+frames.frame.4.height=144
+frames.frame.4.pix_fmt="yuv420p"
+frames.frame.5.pts=2560
+frames.frame.5.pkt_dts=2560
+frames.frame.5.width=176
+frames.frame.5.height=144
+frames.frame.5.pix_fmt="yuv420p"
+frames.frame.6.pts=3072
+frames.frame.6.pkt_dts=3072
+frames.frame.6.width=176
+frames.frame.6.height=144
+frames.frame.6.pix_fmt="yuv420p"
+frames.frame.7.pts=3584
+frames.frame.7.pkt_dts=3584
+frames.frame.7.width=176
+frames.frame.7.height=144
+frames.frame.7.pix_fmt="yuv420p"
+frames.frame.8.pts=4096
+frames.frame.8.pkt_dts=4096
+frames.frame.8.width=176
+frames.frame.8.height=144
+frames.frame.8.pix_fmt="yuv420p"
+frames.frame.9.pts=4608
+frames.frame.9.pkt_dts=4608
+frames.frame.9.width=176
+frames.frame.9.height=144
+frames.frame.9.pix_fmt="yuv420p"
+frames.frame.10.pts=5120
+frames.frame.10.pkt_dts=5120
+frames.frame.10.width=176
+frames.frame.10.height=144
+frames.frame.10.pix_fmt="yuv420p"
+frames.frame.11.pts=5632
+frames.frame.11.pkt_dts=5632
+frames.frame.11.width=176
+frames.frame.11.height=144
+frames.frame.11.pix_fmt="yuv420p"
+frames.frame.12.pts=6144
+frames.frame.12.pkt_dts=6144
+frames.frame.12.width=176
+frames.frame.12.height=144
+frames.frame.12.pix_fmt="yuv420p"
+frames.frame.13.pts=6656
+frames.frame.13.pkt_dts=6656
+frames.frame.13.width=176
+frames.frame.13.height=144
+frames.frame.13.pix_fmt="yuv420p"
+frames.frame.14.pts=7168
+frames.frame.14.pkt_dts=7168
+frames.frame.14.width=176
+frames.frame.14.height=144
+frames.frame.14.pix_fmt="yuv420p"
+frames.frame.15.pts=7680
+frames.frame.15.pkt_dts="N/A"
+frames.frame.15.width=176
+frames.frame.15.height=144
+frames.frame.15.pix_fmt="yuv420p"
+frames.frame.16.pts=8192
+frames.frame.16.pkt_dts="N/A"
+frames.frame.16.width=176
+frames.frame.16.height=144
+frames.frame.16.pix_fmt="yuv420p"