From 8c5f06c37f3c267ecd8f867cd49765c366b5f47c Mon Sep 17 00:00:00 2001
From: Fox Caminiti <fox@foxcam.net>
Date: Thu, 18 Aug 2022 23:11:29 -0400
Subject: many additions

---
 ffmpeg_backend.cpp | 33 +++++++++++++++++++++++----------
 1 file changed, 23 insertions(+), 10 deletions(-)

(limited to 'ffmpeg_backend.cpp')

diff --git a/ffmpeg_backend.cpp b/ffmpeg_backend.cpp
index 6f0aeb5..03d3214 100644
--- a/ffmpeg_backend.cpp
+++ b/ffmpeg_backend.cpp
@@ -6,6 +6,7 @@ extern "C" {
 #include <libswscale/swscale.h>
 }
 
+/*
 // workaround to make libav error printing work
 #ifdef av_err2str
 #undef av_err2str
@@ -16,6 +17,7 @@ av_always_inline std::string av_err2string(int errnum) {
 }
 #define av_err2str(err) av_err2string(err).c_str()
 #endif  // av_err2str
+*/
 
 #include "ffmpeg_backend.h"
 
@@ -54,9 +56,7 @@ bool32 AV_TryFrame(av_info *AV, int32 *err)
     return 0;
 }
 
-// TODO(fox): Could be combined into AV_Init once we have dealloc functions for
-// the AVInfo allocation.
-bool32 AV_IsFileSupported(char *filename)
+bool32 AV_IsFileSupported(char *filename, bool32 *IsVideo)
 {
     int32 err = 0;
 
@@ -81,9 +81,22 @@ bool32 AV_IsFileSupported(char *filename)
             return 0;
     }
 
-    avformat_free_context(temp);
+    for (uint32 i = 0; i < temp->nb_streams; i++)
+    {
+        AVCodecParameters *LocalCodecParameters = NULL;
+        LocalCodecParameters = temp->streams[i]->codecpar;
+        if (LocalCodecParameters->codec_type == AVMEDIA_TYPE_VIDEO) {
+            if (temp->streams[i]->duration > 1) {
+                *IsVideo = true;
+            }
+            avformat_free_context(temp);
+            return 1;
+        }
+    }
 
-    return 1;
+    printf("Libav error: No video track found.");
+
+    return 0;
 }
 
 // Note that we can't get away with not having to keep track of the AV pointer
@@ -142,7 +155,7 @@ void AV_Init(source *Source, av_info *AV, memory *Memory)
     AV->VideoCodec = avcodec_find_decoder(AV->VideoCodecParameters->codec_id);
 
     if (!AV->VideoCodec) {
-        printf("Libav error: Video codec could not be identified.");
+        printf("Libav error: Suitable decoder could not be identified for codec:\n");
     }
 /*
     int16 codecs = 0;
@@ -261,7 +274,7 @@ cached_bitmap * AV_LoadVideoFrame(source *Source, layer_bitmap_info *BitmapInfo,
             // first frame, so we need to check until it's correct.
             if (FrameToSeek == 0 && AV->VideoFrame->pts != AV->VideoStream->start_time) {
                 av_frame_unref(AV->VideoFrame);
-                printf("NON-START: avg: %li, real pts: %li", SeekPTS, AV->VideoFrame->pts);
+                // printf("NON-START: avg: %li, real pts: %li", SeekPTS, AV->VideoFrame->pts);
                 continue;
             }
 
@@ -270,9 +283,9 @@ cached_bitmap * AV_LoadVideoFrame(source *Source, layer_bitmap_info *BitmapInfo,
             {
                 if (AV->PreviousPTS == -1) {
                     AV->PreviousPTS = AV->VideoFrame->pts;
-                    printf("avg: %li, real pts: %li, difference: %li\n", SeekPTS, AV->VideoFrame->pts, Difference);
+                    // printf("avg: %li, real pts: %li, difference: %li\n", SeekPTS, AV->VideoFrame->pts, Difference);
                 } else {
-                    printf("avg: %li, real pts: %li, difference: %li difference from last pts: %li\n", SeekPTS, AV->VideoFrame->pts, AV->VideoFrame->pts - SeekPTS, AV->VideoFrame->pts - AV->PreviousPTS);
+                    // printf("avg: %li, real pts: %li, difference: %li difference from last pts: %li\n", SeekPTS, AV->VideoFrame->pts, AV->VideoFrame->pts - SeekPTS, AV->VideoFrame->pts - AV->PreviousPTS);
                     AV->PreviousPTS = AV->VideoFrame->pts;
                 }
 
@@ -308,7 +321,7 @@ cached_bitmap * AV_LoadVideoFrame(source *Source, layer_bitmap_info *BitmapInfo,
             else
             {
                 // If this gets printed when not seeking, a frame has been skipped!
-                printf("FRAME SKIP: avg: %li, real pts: %li, difference: %li\n", SeekPTS, AV->VideoFrame->pts, Difference);
+                // printf("FRAME SKIP: avg: %li, real pts: %li, difference: %li\n", SeekPTS, AV->VideoFrame->pts, Difference);
             }
             av_frame_unref(AV->VideoFrame);
         }
-- 
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