kumquat-buildroot/package/bento4/0014-Implemented-GetSampleIndexForTimeStamp-GetNearestSyn.patch

From f673675843144785658a010bab455972d83af004 Mon Sep 17 00:00:00 2001
From: peak3d <pfau@peak3d.de>
Date: Thu, 22 Jul 2021 11:09:37 +0200
Subject: [PATCH] Implemented
 GetSampleIndexForTimeStamp/GetNearestSyncSampleIndex

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
---
 Source/C++/Core/Ap4FragmentSampleTable.cpp | 25 ++++++++++++++++++----
 1 file changed, 21 insertions(+), 4 deletions(-)

diff --git a/Source/C++/Core/Ap4FragmentSampleTable.cpp b/Source/C++/Core/Ap4FragmentSampleTable.cpp
index cea5c7d..1c62f24 100644
--- a/Source/C++/Core/Ap4FragmentSampleTable.cpp
+++ b/Source/C++/Core/Ap4FragmentSampleTable.cpp
@@ -297,10 +297,19 @@ AP4_FragmentSampleTable::GetSampleChunkPosition(AP4_Ordinal  sample_index,
 |   AP4_FragmentSampleTable::GetSampleIndexForTimeStamp
 +---------------------------------------------------------------------*/
 AP4_Result 
-AP4_FragmentSampleTable::GetSampleIndexForTimeStamp(AP4_UI64     /*ts*/, 
+AP4_FragmentSampleTable::GetSampleIndexForTimeStamp(AP4_UI64 ts, 
                                                     AP4_Ordinal& sample_index)
 {
-    sample_index = 0; // TODO
+    if (!m_Samples.ItemCount())
+        return AP4_ERROR_NOT_ENOUGH_DATA;
+
+    sample_index = 0;
+    while (sample_index < m_Samples.ItemCount() && m_Samples[sample_index].GetCts() + m_Samples[sample_index].GetDuration() < ts)
+        ++sample_index;
+
+    if (sample_index == m_Samples.ItemCount())
+        return AP4_ERROR_NOT_ENOUGH_DATA;
+
     return AP4_SUCCESS;
 }
 
@@ -308,8 +317,16 @@ AP4_FragmentSampleTable::GetSampleIndexForTimeStamp(AP4_UI64     /*ts*/,
 |   AP4_FragmentSampleTable::GetNearestSyncSampleIndex
 +---------------------------------------------------------------------*/
 AP4_Ordinal  
-AP4_FragmentSampleTable::GetNearestSyncSampleIndex(AP4_Ordinal /*sample_index*/, bool /*before*/)
+AP4_FragmentSampleTable::GetNearestSyncSampleIndex(AP4_Ordinal sample_index, bool before)
 {
-    return 0; // TODO
+    if (sample_index >= m_Samples.ItemCount())
+        return sample_index;
+
+    AP4_Ordinal end(before ? 0 : m_Samples.ItemCount());
+
+    while (sample_index != end && !m_Samples[sample_index].IsSync())
+        sample_index = sample_index + (before ? -1 : 1);
+
+    return sample_index;
 }
 
-- 
2.30.2