eamad: allocate a dummy reference frame when the real one is missing

[ffmpeg] / libavutil / imgutils.c

diff --git a/libavutil/imgutils.c b/libavutil/imgutils.c
index fdc07f87a7f236e5561daf9418e588870d4fe137..413329d50bae2601d1282efdc79db73da7b70da7 100644 (file)
--- a/libavutil/imgutils.c
+++ b/libavutil/imgutils.c
@@ -47,11 +47,14 @@ void av_image_fill_max_pixsteps(int max_pixsteps[4], int max_pixstep_comps[4],
 
 int av_image_get_linesize(enum AVPixelFormat pix_fmt, int width, int plane)
 {
-    const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
+    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
     int max_step     [4];       /* max pixel step for each plane */
     int max_step_comp[4];       /* the component for each plane which has the max pixel step */
     int s;
 
+    if (!desc)
+        return AVERROR(EINVAL);
+
     if (desc->flags & PIX_FMT_BITSTREAM)
         return (width * (desc->comp[0].step_minus1+1) + 7) >> 3;
 
@@ -63,13 +66,13 @@ int av_image_get_linesize(enum AVPixelFormat pix_fmt, int width, int plane)
 int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width)
 {
     int i;
-    const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
+    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
     int max_step     [4];       /* max pixel step for each plane */
     int max_step_comp[4];       /* the component for each plane which has the max pixel step */
 
     memset(linesizes, 0, 4*sizeof(linesizes[0]));
 
-    if ((unsigned)pix_fmt >= AV_PIX_FMT_NB || desc->flags & PIX_FMT_HWACCEL)
+    if (!desc || desc->flags & PIX_FMT_HWACCEL)
         return AVERROR(EINVAL);
 
     if (desc->flags & PIX_FMT_BITSTREAM) {
@@ -96,10 +99,10 @@ int av_image_fill_pointers(uint8_t *data[4], enum AVPixelFormat pix_fmt, int hei
 {
     int i, total_size, size[4] = { 0 }, has_plane[4] = { 0 };
 
-    const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
+    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
     memset(data     , 0, sizeof(data[0])*4);
 
-    if ((unsigned)pix_fmt >= AV_PIX_FMT_NB || desc->flags & PIX_FMT_HWACCEL)
+    if (!desc || desc->flags & PIX_FMT_HWACCEL)
         return AVERROR(EINVAL);
 
     data[0] = ptr;
@@ -133,7 +136,7 @@ int av_image_fill_pointers(uint8_t *data[4], enum AVPixelFormat pix_fmt, int hei
     return total_size;
 }
 
-int ff_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt)
+int avpriv_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt)
 {
     int i;
 
@@ -176,9 +179,13 @@ int ff_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt)
 int av_image_alloc(uint8_t *pointers[4], int linesizes[4],
                    int w, int h, enum AVPixelFormat pix_fmt, int align)
 {
+    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
     int i, ret;
     uint8_t *buf;
 
+    if (!desc)
+        return AVERROR(EINVAL);
+
     if ((ret = av_image_check_size(w, h, 0, NULL)) < 0)
         return ret;
     if ((ret = av_image_fill_linesizes(linesizes, pix_fmt, w)) < 0)
@@ -196,9 +203,8 @@ int av_image_alloc(uint8_t *pointers[4], int linesizes[4],
         av_free(buf);
         return ret;
     }
-    if (av_pix_fmt_descriptors[pix_fmt].flags & PIX_FMT_PAL ||
-        av_pix_fmt_descriptors[pix_fmt].flags & PIX_FMT_PSEUDOPAL)
-        ff_set_systematic_pal2((uint32_t*)pointers[1], pix_fmt);
+    if (desc->flags & PIX_FMT_PAL || desc->flags & PIX_FMT_PSEUDOPAL)
+        avpriv_set_systematic_pal2((uint32_t*)pointers[1], pix_fmt);
 
     return ret;
 }
@@ -239,9 +245,9 @@ void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4],
                    const uint8_t *src_data[4], const int src_linesizes[4],
                    enum AVPixelFormat pix_fmt, int width, int height)
 {
-    const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
+    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
 
-    if (desc->flags & PIX_FMT_HWACCEL)
+    if (!desc || desc->flags & PIX_FMT_HWACCEL)
         return;
 
     if (desc->flags & PIX_FMT_PAL ||