lavf/mov.c: Use the correct offset to shift timestamp when seeking.

Fixes seek for files with empty edits and files with negative ctts
(dts_shift > 0). Added fate samples and tests.

Signed-off-by: Sasi Inguva <isasi@isasi.mtv.corp.google.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

4 files changed, 384 insertions, 0 deletions

diff --git a/tests/fate/seek.mak b/tests/fate/seek.mak
index 751873baa4..6a9f843d82 100644
--- a/tests/fate/seek.mak
+++ b/tests/fate/seek.mak
@@ -251,9 +251,15 @@ FATE_SEEK_EXTRA-$(CONFIG_MP3_DEMUXER)   += fate-seek-extra-mp3
 FATE_SEEK_EXTRA-$(call ALLYES, CACHE_PROTOCOL PIPE_PROTOCOL MP3_DEMUXER) += fate-seek-cache-pipe
 FATE_SEEK_EXTRA-$(CONFIG_MATROSKA_DEMUXER) += fate-seek-mkv-codec-delay
 FATE_SEEK_EXTRA-$(CONFIG_MOV_DEMUXER) += fate-seek-extra-mp4
+FATE_SEEK_EXTRA-$(CONFIG_MOV_DEMUXER) += fate-seek-empty-edit-mp4
+FATE_SEEK_EXTRA-$(CONFIG_MOV_DEMUXER) += fate-seek-test-iibbibb-mp4
+FATE_SEEK_EXTRA-$(CONFIG_MOV_DEMUXER) += fate-seek-test-iibbibb-neg-ctts-mp4
 
 fate-seek-extra-mp3:  CMD = run libavformat/tests/seek$(EXESUF) $(TARGET_SAMPLES)/gapless/gapless.mp3 -fastseek 1
 fate-seek-extra-mp4:  CMD = run libavformat/tests/seek$(EXESUF) $(TARGET_SAMPLES)/mov/buck480p30_na.mp4 -duration 180 -frames 4
+fate-seek-empty-edit-mp4:  CMD = run libavformat/tests/seek$(EXESUF) $(TARGET_SAMPLES)/mov/empty_edit_5s.mp4 -duration 15 -frames 4
+fate-seek-test-iibbibb-mp4:  CMD = run libavformat/tests/seek$(EXESUF) $(TARGET_SAMPLES)/mov/test_iibbibb.mp4 -duration 13 -frames 4
+fate-seek-test-iibbibb-neg-ctts-mp4:  CMD = run libavformat/tests/seek$(EXESUF) $(TARGET_SAMPLES)/mov/test_iibbibb_neg_ctts.mp4 -duration 13 -frames 4
 fate-seek-cache-pipe: CMD = cat $(TARGET_SAMPLES)/gapless/gapless.mp3 | run libavformat/tests/seek$(EXESUF) cache:pipe:0 -read_ahead_limit -1
 fate-seek-mkv-codec-delay:   CMD = run libavformat/tests/seek$(EXESUF) $(TARGET_SAMPLES)/mkv/codec_delay_opus.mkv
 
diff --git a/tests/ref/seek/empty-edit-mp4 b/tests/ref/seek/empty-edit-mp4
new file mode 100644
index 0000000000..f0a4ad30b0
--- /dev/null
+++ b/tests/ref/seek/empty-edit-mp4
@@ -0,0 +1,134 @@
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diff --git a/tests/ref/seek/test-iibbibb-mp4 b/tests/ref/seek/test-iibbibb-mp4
new file mode 100644
index 0000000000..5a89600218
--- /dev/null
+++ b/tests/ref/seek/test-iibbibb-mp4
@@ -0,0 +1,122 @@
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diff --git a/tests/ref/seek/test-iibbibb-neg-ctts-mp4 b/tests/ref/seek/test-iibbibb-neg-ctts-mp4
new file mode 100644
index 0000000000..5a89600218
--- /dev/null
+++ b/tests/ref/seek/test-iibbibb-neg-ctts-mp4
@@ -0,0 +1,122 @@
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+ret:-EOF
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+ret:-EOF
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+ret:-EOF
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+ret:-EOF
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+ret:-EOF
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