From effa31d902975a70f5856ee03b951f5b26054447 Mon Sep 17 00:00:00 2001
From: Timothy Pearson <kb9vqf@pearsoncomputing.net>
Date: Mon, 6 Oct 2014 14:02:57 -0500
Subject: Fix crash when img_convert unavailable

---
 k9author/k9avidecode.cpp | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

(limited to 'k9author/k9avidecode.cpp')

diff --git a/k9author/k9avidecode.cpp b/k9author/k9avidecode.cpp
index 731b1d3..77f8d2b 100644
--- a/k9author/k9avidecode.cpp
+++ b/k9author/k9avidecode.cpp
@@ -35,6 +35,7 @@
 void *CodecHandle=0;
 void *FormatHandle=0;
 void *UtilHandle=0;
+void *SwscaleHandle=0;
 int glibref=0;
 
 #ifdef NEW_FFMPEG
@@ -49,12 +50,22 @@ void av_free_packet(AVPacket *pkt)
 #endif
 #endif
 
+#ifdef HAVE_SWSCALE
+#include "libswscale/swscale.h"
+static int sws_flags = SWS_BICUBIC;
+#endif
+
 k9AviDecode::k9AviDecode(TQObject *parent, const char *name)
         : TQObject(parent, name) {
     if (glibref==0) {
         CodecHandle=dlopen("libavcodec.so",RTLD_LAZY | RTLD_GLOBAL);
         FormatHandle=dlopen("libavformat.so",RTLD_LAZY | RTLD_GLOBAL);
         UtilHandle=dlopen("libavutil.so",RTLD_LAZY | RTLD_GLOBAL);
+#   ifdef HAVE_SWSCALE
+        SwscaleHandle=dlopen("libswscale.so",RTLD_LAZY);
+        if (SwscaleHandle==0)
+            SwscaleHandle=dlopen("libswscale.so.2",RTLD_LAZY);
+#   endif
     }
     if (!CodecHandle) {
         m_error =i18n("Cannot open then library %1").arg("libavcodec");
@@ -69,6 +80,11 @@ k9AviDecode::k9AviDecode(TQObject *parent, const char *name)
         m_error =i18n("Cannot open then library %1").arg("libavutil");
         return;
     }
+#   endif
+#   ifdef HAVE_SWSCALE
+    if (!SwscaleHandle) {
+        m_error =i18n("Cannot open the library %1").arg("libswscale");
+    }
 #   endif
     m_error="";
     av_register_all = (av_register_all_t)dlsym(FormatHandle,"av_register_all");
@@ -98,7 +114,12 @@ k9AviDecode::k9AviDecode(TQObject *parent, const char *name)
 #   else
     avcodec_decode_video = (avcodec_decode_video_t)dlsym(CodecHandle,"avcodec_decode_video");
 #   endif
+#   ifndef HAVE_SWSCALE
     img_convert = (img_convert_t)dlsym(CodecHandle,"img_convert");
+    //if img_convert is null (deprecated in ffmpeg), we need libswscale
+    if (!img_convert)
+        errs << i18n("Cannot open the library %1").arg("libswscale");
+#   endif
     av_free = (av_free_t)dlsym(CodecHandle,"av_free");
     avcodec_close = (avcodec_close_t)dlsym(FormatHandle,"avcodec_close");
 #   if LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(53, 17, 0)
@@ -109,6 +130,11 @@ k9AviDecode::k9AviDecode(TQObject *parent, const char *name)
     av_seek_frame=(av_seek_frame_t)dlsym(FormatHandle,"av_seek_frame");
     av_rescale_q=(av_rescale_q_t)dlsym(FormatHandle,"av_rescale_q");
     avcodec_flush_buffers=(avcodec_flush_buffers_t)dlsym(CodecHandle,"avcodec_flush_buffers");
+#   ifdef HAVE_SWSCALE
+    sws_freeContext= (sws_freeContext_t)dlsym(SwscaleHandle,"sws_freeContext");
+    sws_getContext=(sws_getContext_t)dlsym(SwscaleHandle,"sws_getContext");
+    sws_scale= (sws_scale_t)dlsym(SwscaleHandle,"sws_scale");
+#   endif
 
 #   if LIBAVUTIL_VERSION_INT >= AV_VERSION_INT(51, 33, 0)
     av_gettime=(av_gettime_t)dlsym(UtilHandle,"av_gettime");
@@ -139,6 +165,11 @@ k9AviDecode::~k9AviDecode() {
         if(UtilHandle) {
             dlclose(UtilHandle);
         }
+#       ifdef HAVE_SWSCALE
+        if (SwscaleHandle) {
+            dlclose(CodecHandle);
+        }
+#       endif
     }
 
 }
@@ -257,6 +288,9 @@ void k9AviDecode::readFrame(double _seconds) {
     int frameFinished=0;
     AVPacket packet;
 
+#   ifdef HAVE_SWSCALE
+    struct SwsContext *toRGB_convert_ctx;
+#   endif
     bool bFound=false;
     while (av_read_frame(m_FormatCtx, &packet)>=0 &&  !bFound) {
         // Is this a packet from the video stream?
@@ -281,6 +315,7 @@ void k9AviDecode::readFrame(double _seconds) {
 #               endif
                 if (cur_dts >=fspos) {
                     bFound=true;
+#                   ifndef HAVE_SWSCALE
                     // Convert the image from its native format to RGB
                     img_convert((AVPicture *)m_FrameRGB, PIX_FMT_RGB24,
                                 (AVPicture*)m_Frame, m_CodecCtx->pix_fmt,
@@ -289,6 +324,14 @@ void k9AviDecode::readFrame(double _seconds) {
                     // convert frame to TQImage
                     SaveFrame(m_FrameRGB, m_CodecCtx->width,
                               m_CodecCtx->height);
+#                   else
+                    toRGB_convert_ctx=sws_getContext(m_CodecCtx->width, m_CodecCtx->height, m_CodecCtx->pix_fmt, m_CodecCtx->width, m_CodecCtx->height, PIX_FMT_RGB24, sws_flags,NULL,NULL,NULL);
+                              sws_scale(toRGB_convert_ctx, m_Frame->data, m_Frame->linesize, 0, m_CodecCtx->height, m_FrameRGB->data,m_FrameRGB->linesize);
+                    // convert frame to QImage
+                    SaveFrame(m_FrameRGB, m_CodecCtx->width,
+                              m_CodecCtx->height);
+                    sws_freeContext(toRGB_convert_ctx);
+#                   endif
                 }
             }
         }
-- 
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