Support newer GIFLIB versions

This is an adapted upstream patch. This patch is incomplete so a new
patch needs to be added after this one.

Upstream commit:

   https://github.com/pigoz/mplayer-svn/commit/a0ddaef5457e222dade386901bf448c5e3ac7b89

Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>

From a0ddaef5457e222dade386901bf448c5e3ac7b89 Mon Sep 17 00:00:00 2001
From: al <al@b3059339-0415-0410-9bf9-f77b7e298cf2>
Date: Sat, 27 Jul 2013 21:16:06 +0000
Subject: [PATCH] Support newer GIFLIB versions

Work with GIFLIB version >= 4.2

Several functions have been renamed or changed in signature.

GIFLIB is used by vo gif89a and demuxer gif.

Note about GIFLIB Version 4.2:
It does not work with vanilla GIFLIB 4.2 but it works with
versions that have re-added quantize support like e.g. the
package from arch linux.

Note about GIFLIB Version 5:
The newly added GCB functions use size_t but the necessary
standard headers are not included in gif_lib.h . To workaround
this:

* configure: use statement_check_broken to include stdlib.h
* vo gif89: include gif_lib.h after stdlib.h
* demuxer gif: no workaround needed,
               gif_lib.h is already included after stdlib.h



git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@36367 b3059339-0415-0410-9bf9-f77b7e298cf2
---
 configure              |    1 +
 libmpdemux/demux_gif.c |   44 +++++++++++++++++++++++++++++++++++---------
 libvo/vo_gif89a.c      |   35 ++++++++++++++++++++++++-----------
 3 files changed, 61 insertions(+), 21 deletions(-)

diff --git a/configure b/configure
index e9152a8..4cd378d 100755
--- a/configure
+++ b/configure
@@ -4938,6 +4938,7 @@ if test "$_gif" = auto ; then
   _gif=no
   for ld_gif in "-lungif" "-lgif" ; do
     statement_check gif_lib.h 'QuantizeBuffer(0, 0, 0, 0, 0, 0, 0, 0)' $ld_gif && _gif=yes && break
+    statement_check_broken stdlib.h gif_lib.h 'GifQuantizeBuffer(0, 0, 0, 0, 0, 0, 0, 0)' $ld_gif && _gif=yes && break
   done
 fi
 
 
diff --git a/libmpdemux/demux_gif.c b/libmpdemux/demux_gif.c
index 804ce8c..0a11322 100644
--- a/libmpdemux/demux_gif.c
+++ b/libmpdemux/demux_gif.c
@@ -45,6 +45,32 @@ typedef struct {
 
 #define GIF_SIGNATURE (('G' << 16) | ('I' << 8) | 'F')
 
+#if defined GIFLIB_MAJOR && GIFLIB_MAJOR >= 5
+#define DGifOpen(a, b) DGifOpen(a, b, NULL)
+#define DGifOpenFileHandle(a) DGifOpenFileHandle(a, NULL)
+#define GifError() (gif ? gif->Error : 0)
+#define GifErrorString() GifErrorString(gif->Error)
+#endif
+
+/* >= 4.2 prior GIFLIB did not have MAJOR/MINOR defines */
+#if defined GIFLIB_MAJOR && GIFLIB_MAJOR >= 4
+static void print_gif_error(GifFileType *gif)
+{
+  int err = GifError();
+  char *err_str = GifErrorString();
+
+  if (err_str)
+    mp_msg(MSGT_DEMUX, MSGL_ERR, "\n[gif] GIF-LIB error: %s.\n", err_str);
+  else
+    mp_msg(MSGT_DEMUX, MSGL_ERR, "\n[gif] GIF-LIB undefined error %d.\n", err);
+}
+#else
+static void print_gif_error(GifFileType *gif)
+{
+  PrintGifError();
+}
+#endif
+
 #ifndef CONFIG_GIF_TVT_HACK
 // not supported by certain versions of the library
 static int my_read_gif(GifFileType *gif, uint8_t *buf, int len)
@@ -94,14 +120,14 @@ static int demux_gif_fill_buffer(demuxer_t *demuxer, demux_stream_t *ds)
 
   while (type != IMAGE_DESC_RECORD_TYPE) {
     if (DGifGetRecordType(gif, &type) == GIF_ERROR) {
-      PrintGifError();
+      print_gif_error(priv->gif);
       return 0; // oops
     }
     if (type == TERMINATE_RECORD_TYPE)
       return 0; // eof
     if (type == SCREEN_DESC_RECORD_TYPE) {
       if (DGifGetScreenDesc(gif) == GIF_ERROR) {
-        PrintGifError();
+        print_gif_error(priv->gif);
         return 0; // oops
       }
     }
@@ -109,7 +135,7 @@ static int demux_gif_fill_buffer(demuxer_t *demuxer, demux_stream_t *ds)
       int code;
       unsigned char *p = NULL;
       if (DGifGetExtension(gif, &code, &p) == GIF_ERROR) {
-        PrintGifError();
+        print_gif_error(priv->gif);
         return 0; // oops
       }
       if (code == 0xF9) {
@@ -138,7 +164,7 @@ static int demux_gif_fill_buffer(demuxer_t *demuxer, demux_stream_t *ds)
 	  comments[length] = 0;
 	  printf("%s", comments);
           if (DGifGetExtensionNext(gif, &p) == GIF_ERROR) {
-            PrintGifError();
+            print_gif_error(priv->gif);
             return 0; // oops
           }
 	}
@@ -146,7 +172,7 @@ static int demux_gif_fill_buffer(demuxer_t *demuxer, demux_stream_t *ds)
       }
       while (p != NULL) {
         if (DGifGetExtensionNext(gif, &p) == GIF_ERROR) {
-          PrintGifError();
+          print_gif_error(priv->gif);
           return 0; // oops
         }
       }
@@ -154,7 +180,7 @@ static int demux_gif_fill_buffer(demuxer_t *demuxer, demux_stream_t *ds)
   }
 
   if (DGifGetImageDesc(gif) == GIF_ERROR) {
-    PrintGifError();
+    print_gif_error(priv->gif);
     return 0; // oops
   }
 
@@ -167,7 +193,7 @@ static int demux_gif_fill_buffer(demuxer_t *demuxer, demux_stream_t *ds)
     memset(dp->buffer, gif->SBackGroundColor, priv->w * priv->h);
 
   if (DGifGetLine(gif, buf, len) == GIF_ERROR) {
-    PrintGifError();
+    print_gif_error(priv->gif);
     free(buf);
     free_demux_packet(dp);
     return 0; // oops
@@ -261,7 +287,7 @@ static demuxer_t* demux_open_gif(demuxer_t* demuxer)
   gif = DGifOpen(demuxer->stream, my_read_gif);
 #endif
   if (!gif) {
-    PrintGifError();
+    print_gif_error(NULL);
     free(priv);
     return NULL;
   }
@@ -303,7 +329,7 @@ static void demux_close_gif(demuxer_t* demuxer)
   gif_priv_t *priv = demuxer->priv;
   if (!priv) return;
   if (priv->gif && DGifCloseFile(priv->gif) == GIF_ERROR)
-    PrintGifError();
+    print_gif_error(priv->gif);
   free(priv->refimg);
   free(priv);
 }
diff --git a/libvo/vo_gif89a.c b/libvo/vo_gif89a.c
index b808f81..160291a 100644
--- a/libvo/vo_gif89a.c
+++ b/libvo/vo_gif89a.c
@@ -44,13 +44,13 @@
  * entire argument being interpretted as the filename.
  */
 
-#include <gif_lib.h>
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 
+#include <gif_lib.h>
+
 #include "config.h"
 #include "subopt-helper.h"
 #include "video_out.h"
@@ -69,6 +69,12 @@ static const vo_info_t info = {
 
 const LIBVO_EXTERN(gif89a)
 
+#if defined GIFLIB_MAJOR && GIFLIB_MAJOR >= 5
+#define EGifOpenFileName(a, b) EGifOpenFileName(a, b, NULL)
+#define MakeMapObject GifMakeMapObject
+#define FreeMapObject GifFreeMapObject
+#define QuantizeBuffer GifQuantizeBuffer
+#endif
 
 // how many frames per second we are aiming for during output.
 static float target_fps;
@@ -156,7 +162,7 @@ static int config(uint32_t s_width, uint32_t s_height, uint32_t d_width,
 		uint32_t d_height, uint32_t flags, char *title,
 		uint32_t format)
 {
-#ifdef CONFIG_GIF_4
+#if defined CONFIG_GIF_4 || GIFLIB_MAJOR >= 5
 	// these are control blocks for the gif looping extension.
 	char LB1[] = "NETSCAPE2.0";
 	char LB2[] = { 1, 0, 0 };
@@ -185,23 +191,25 @@ static int config(uint32_t s_width, uint32_t s_height, uint32_t d_width,
 		return 1;
 	}
 
+	new_gif = EGifOpenFileName(gif_filename, 0);
+	if (new_gif == NULL) {
+		mp_msg(MSGT_VO, MSGL_ERR, "GIF89a: error opening file \"%s\" for output.\n", gif_filename);
+		return 1;
+	}
+
+#if defined GIFLIB_MAJOR && GIFLIB_MAJOR >= 5
+	EGifSetGifVersion(new_gif, 1);
+#elif defined CONFIG_GIF_4
 	// the EGifSetGifVersion line causes segfaults in certain
 	// earlier versions of libungif.  i don't know exactly which,
 	// but certainly in all those before v4.  if you have problems,
 	// you need to upgrade your gif library.
-#ifdef CONFIG_GIF_4
 	EGifSetGifVersion("89a");
 #else
 	mp_msg(MSGT_VO, MSGL_ERR, "GIF89a: Your version of libungif needs to be upgraded.\n");
 	mp_msg(MSGT_VO, MSGL_ERR, "GIF89a: Some functionality has been disabled.\n");
 #endif
 
-	new_gif = EGifOpenFileName(gif_filename, 0);
-	if (new_gif == NULL) {
-		mp_msg(MSGT_VO, MSGL_ERR, "GIF89a: error opening file \"%s\" for output.\n", gif_filename);
-		return 1;
-	}
-
 	slice_data = malloc(img_width * img_height * 3);
 	if (slice_data == NULL) {
 		mp_msg(MSGT_VO, MSGL_ERR, "GIF89a: malloc failed.\n");
@@ -231,7 +239,12 @@ static int config(uint32_t s_width, uint32_t s_height, uint32_t d_width,
 
 	// set the initial width and height info.
 	EGifPutScreenDesc(new_gif, s_width, s_height, 256, 0, reduce_cmap);
-#ifdef CONFIG_GIF_4
+#if defined GIFLIB_MAJOR && GIFLIB_MAJOR >= 5
+	EGifPutExtensionLeader(new_gif, 0xFF);
+	EGifPutExtensionBlock(new_gif, 11, LB1);
+	EGifPutExtensionBlock(new_gif, 3, LB2);
+	EGifPutExtensionTrailer(new_gif);
+#elif defined CONFIG_GIF_4
 	// version 3 of libungif does not support multiple control blocks.
 	// looping requires multiple control blocks.
 	// therefore, looping is only enabled for v4 and up.
-- 
1.7.1

