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85 lines
2.7 KiB
C++
85 lines
2.7 KiB
C++
// SPDX-License-Identifier: GPL-3.0-or-later
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// Copyright (C) 2026 steredbits and Pelagia contributors
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// Tests of the PTS -> media position realignment after a seek.
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//
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// The "network" scenarios simulate a mocked source: the stream is
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// reopened on the server side with startTimeTicks, and we do NOT assume the PTS
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// restart from 0 - the offset is frozen at the first PTS received of the new
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// generation.
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#include "player/seek_offset.h"
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#include "test_framework.h"
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using player::SeekOffsetTracker;
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// Local file: absolute PTS, the offset stays fixed whatever the seek.
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static void test_absolute_source() {
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SeekOffsetTracker tr;
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tr.init(/*timestamps_absolute=*/true, /*static_offset_ms=*/0);
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tr.on_seek(0);
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CHECK_EQ(tr.media_time(0), 0);
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CHECK_EQ(tr.media_time(40), 40);
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// Seek to 600 s: av_seek_frame lands on the previous keyframe (598.2 s),
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// the media position remains the PTS itself.
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tr.on_seek(600000);
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CHECK_EQ(tr.media_time(598200), 598200);
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CHECK_EQ(tr.offset_ms(), 0);
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}
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// Local file whose container does not start at 0 (MPEG-TS, start_time
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// 1.4 s): static offset -start_time to display a 0-based position.
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static void test_absolute_source_with_start_time() {
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SeekOffsetTracker tr;
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tr.init(true, -1400);
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tr.on_seek(0);
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CHECK_EQ(tr.media_time(1400), 0);
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CHECK_EQ(tr.media_time(1440), 40);
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}
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// Mocked "network" source, PTS restarting from 0 after the seek.
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static void test_network_pts_restart_at_zero() {
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SeekOffsetTracker tr;
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tr.init(/*timestamps_absolute=*/false, 0);
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tr.on_seek(0);
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CHECK_EQ(tr.media_time(0), 0);
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CHECK_EQ(tr.media_time(40), 40);
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// Seek to 600 s: the server restarts the transcoding, first PTS = 0.
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tr.on_seek(600000);
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CHECK_EQ(tr.media_time(0), 600000);
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CHECK_EQ(tr.media_time(40), 600040);
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CHECK_EQ(tr.offset_ms(), 600000);
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}
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// Mocked "network" source, NON-zero PTS after the seek (TS muxer offset,
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// transcoding that does not restart exactly from the target, etc.).
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static void test_network_pts_nonzero_after_seek() {
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SeekOffsetTracker tr;
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tr.init(false, 0);
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tr.on_seek(0);
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CHECK_EQ(tr.media_time(1400), 0); // even the opening is realigned
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CHECK_EQ(tr.media_time(1440), 40);
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// Seek to 600 s: first PTS received 1.4 s -> offset 598.6 s.
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tr.on_seek(600000);
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CHECK_EQ(tr.media_time(1400), 600000);
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CHECK_EQ(tr.media_time(1480), 600080);
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CHECK_EQ(tr.offset_ms(), 598600);
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// Second seek: the offset is frozen again on the new first PTS.
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tr.on_seek(120000);
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CHECK_EQ(tr.media_time(10000), 120000);
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CHECK_EQ(tr.media_time(10040), 120040);
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CHECK_EQ(tr.offset_ms(), 110000);
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}
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int main() {
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test_absolute_source();
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test_absolute_source_with_start_time();
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test_network_pts_restart_at_zero();
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test_network_pts_nonzero_after_seek();
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return testfw::test_failures();
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}
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