From 375c120d30456738897c4bd775e38aa1db7d239c Mon Sep 17 00:00:00 2001
From: Fox Caminiti <fox@foxcam.net>
Date: Thu, 22 Dec 2022 13:29:02 -0500
Subject: v3.1

---
 src/ffmpeg_backend.cpp | 42 ++++++------------------------------------
 1 file changed, 6 insertions(+), 36 deletions(-)

(limited to 'src/ffmpeg_backend.cpp')

diff --git a/src/ffmpeg_backend.cpp b/src/ffmpeg_backend.cpp
index 821afce..a104714 100644
--- a/src/ffmpeg_backend.cpp
+++ b/src/ffmpeg_backend.cpp
@@ -253,7 +253,7 @@ void AV_Init(block_source *Source, av_info *AV, memory *Memory)
     avcodec_flush_buffers(AV->Audio.CodecContext);
 };
 
-uint32 AV_AudioTest(av_info *AV, void *Data, uint32 Size)
+uint32 AV_AudioTest(av_info *AV, void *Data, uint32 Size, real32 FPS, int32 InitialFrameToSeek)
 {
     AVChannelLayout ChannelLayout = {};
     av_channel_layout_default(&ChannelLayout, 2);
@@ -261,12 +261,16 @@ uint32 AV_AudioTest(av_info *AV, void *Data, uint32 Size)
     av_stream_info *Stream = &AV->Audio;
     Assert(Stream->CodecContext->ch_layout.nb_channels == 2);
 
+    real32 TotalFrames = AV->SecondCount * FPS;
+    int64 SeekPTS = (int64)(((real64)InitialFrameToSeek / TotalFrames) * AV->PTSDuration);
+    int64 AveragePTS = AV->PTSDuration / TotalFrames;
+
     int32 err = 0;
     bool32 EndOfFile = 0;
     while (err >= 0) {
         if (AV_TryFrame(AV, Stream->CodecContext, &err, &EndOfFile, Stream->Index))
         {
-            if (AV->Frame->pts < Stream->Stream->start_time) {
+            if (AV->Frame->pts < Stream->Stream->start_time || AV->Frame->pts < SeekPTS) {
                 av_frame_unref(AV->Frame);
                 continue;
             }
@@ -309,40 +313,6 @@ void AV_SeekAudio(av_info *AV, real32 FPS, int32 FrameToSeek)
     Assert(FrameToSeek > -1)
     int64 SeekSeconds = (int64)(FrameToSeek / (int32)(FPS + 0.5f) * AV_TIME_BASE);
     av_seek_frame(AV->FileFormatContext, -1, SeekSeconds, AVSEEK_FLAG_BACKWARD);
-
-    /*
-    real32 TotalFrames = AV->SecondCount * FPS;
-    int64 SeekPTS = (int64)(((real64)FrameToSeek / TotalFrames) * AV->PTSDuration);
-    int64 AveragePTS = AV->PTSDuration / TotalFrames;
-
-    int32 err = 0;
-    bool32 EndOfFile = 0;
-    while (err >= 0) {
-        if (AV_TryFrame(AV, AV->Audio.CodecContext, &err, &EndOfFile))
-        {
-            int a = 0;
-        }
-    }
-
-    while (err >= 0) {
-        if (AV_TryFrame(AV, AV->Audio.CodecContext, &err, &EndOfFile, AV->Audio.Index))
-        {
-            // The first frame that gets loaded isn't always the actual
-            // first frame, so we need to check until it's correct.
-            if (FrameToSeek == 0 && AV->Frame->pts < AV->Audio.Stream->start_time) {
-                av_frame_unref(AV->Frame);
-                // printf("NON-START: avg: %li, real pts: %li", SeekPTS, AV->VideoFrame->pts);
-                continue;
-            }
-
-            int64 Difference = AV->Frame->pts - SeekPTS;
-            if (abs(Difference) < AveragePTS)
-            {
-                return;
-            }
-        }
-    }
-    */
 }
 
 
-- 
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