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gloverlay: properly handle errors while loading file
Post an error on the bus if anything bad happens while reading and parsing the image file. https://bugzilla.gnome.org/show_bug.cgi?id=749846
This commit is contained in:
Xavier Claessens
Nicolas Dufresne
parent
02b2c2edf6
commit
53cd9e3e0e
1 changed files with 91 additions and 44 deletions
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@ -36,6 +36,7 @@
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#include "config.h"
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#endif
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#include <gst/base/gsttypefindhelper.h>
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#include <gst/gl/gstglconfig.h>
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#include "gstgloverlay.h"
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@ -73,8 +74,8 @@ static void gst_gl_overlay_before_transform (GstBaseTransform * trans,
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static gboolean gst_gl_overlay_filter_texture (GstGLFilter * filter,
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guint in_tex, guint out_tex);
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static gboolean gst_gl_overlay_load_png (GstGLFilter * filter);
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static gboolean gst_gl_overlay_load_jpeg (GstGLFilter * filter);
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static gboolean gst_gl_overlay_load_png (GstGLOverlay * overlay, FILE * fp);
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static gboolean gst_gl_overlay_load_jpeg (GstGLOverlay * overlay, FILE * fp);
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enum
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{
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@ -569,6 +570,60 @@ out:
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overlay->geometry_change = FALSE;
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}
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static gboolean
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load_file (GstGLOverlay * overlay)
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{
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FILE *fp;
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guint8 buff[16];
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gsize n_read;
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GstCaps *caps;
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GstStructure *structure;
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gboolean success = FALSE;
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if (overlay->location == NULL)
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return TRUE;
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if ((fp = fopen (overlay->location, "rb")) == NULL) {
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GST_ELEMENT_ERROR (overlay, RESOURCE, NOT_FOUND, ("Can't open file"),
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("File: %s", overlay->location));
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return FALSE;
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}
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n_read = fread (buff, 1, sizeof (buff), fp);
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if (n_read != sizeof (buff)) {
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GST_ELEMENT_ERROR (overlay, STREAM, DECODE, ("Can't read file header"),
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("File: %s", overlay->location));
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goto out;
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}
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caps = gst_type_find_helper_for_data (GST_OBJECT (overlay), buff,
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sizeof (buff), NULL);
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if (caps == NULL) {
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GST_ELEMENT_ERROR (overlay, STREAM, DECODE, ("Can't find file type"),
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("File: %s", overlay->location));
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goto out;
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}
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fseek (fp, 0, SEEK_SET);
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structure = gst_caps_get_structure (caps, 0);
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if (gst_structure_has_name (structure, "image/jpeg")) {
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success = gst_gl_overlay_load_jpeg (overlay, fp);
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} else if (gst_structure_has_name (structure, "image/png")) {
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success = gst_gl_overlay_load_png (overlay, fp);
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} else {
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GST_ELEMENT_ERROR (overlay, STREAM, DECODE, ("Image type not supported"),
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("File: %s", overlay->location));
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}
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out:
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fclose (fp);
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gst_caps_replace (&caps, NULL);
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return success;
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}
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static gboolean
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gst_gl_overlay_filter_texture (GstGLFilter * filter, guint in_tex,
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guint out_tex)
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@ -580,13 +635,9 @@ gst_gl_overlay_filter_texture (GstGLFilter * filter, guint in_tex,
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gst_memory_unref ((GstMemory *) overlay->image_memory);
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overlay->image_memory = NULL;
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}
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if (overlay->location != NULL) {
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if (!gst_gl_overlay_load_png (filter)) {
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if (!gst_gl_overlay_load_jpeg (filter)) {
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return FALSE;
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}
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}
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}
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if (!load_file (overlay))
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return FALSE;
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overlay->location_has_changed = FALSE;
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}
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@ -615,26 +666,17 @@ user_warning_fn (png_structp png_ptr, png_const_charp warning_msg)
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g_warning ("%s\n", warning_msg);
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}
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#define LOAD_ERROR(msg) { GST_WARNING ("unable to load %s: %s", overlay->location, msg); return FALSE; }
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static gboolean
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gst_gl_overlay_load_jpeg (GstGLFilter * filter)
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gst_gl_overlay_load_jpeg (GstGLOverlay * overlay, FILE * fp)
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{
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GstGLOverlay *overlay = GST_GL_OVERLAY (filter);
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GstVideoInfo v_info;
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GstVideoAlignment v_align;
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GstMapInfo map_info;
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FILE *fp = NULL;
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struct jpeg_decompress_struct cinfo;
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struct jpeg_error_mgr jerr;
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JSAMPROW j;
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int i;
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fp = fopen (overlay->location, "rb");
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if (!fp) {
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g_error ("error: couldn't open file!\n");
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return FALSE;
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}
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jpeg_create_decompress (&cinfo);
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cinfo.err = jpeg_std_error (&jerr);
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jpeg_stdio_src (&cinfo, fp);
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@ -654,13 +696,15 @@ gst_gl_overlay_load_jpeg (GstGLFilter * filter)
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v_align.stride_align[0] = 32 - 1;
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gst_video_info_align (&v_info, &v_align);
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overlay->image_memory =
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(GstGLMemory *) gst_gl_memory_alloc (GST_GL_BASE_FILTER (filter)->context,
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overlay->image_memory = (GstGLMemory *)
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gst_gl_memory_alloc (GST_GL_BASE_FILTER (overlay)->context,
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NULL, &v_info, 0, &v_align);
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if (!gst_memory_map ((GstMemory *) overlay->image_memory, &map_info,
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GST_MAP_WRITE)) {
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LOAD_ERROR ("failed to map memory");
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GST_ELEMENT_ERROR (overlay, STREAM, DECODE, ("failed to map memory"),
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("File: %s", overlay->location));
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return FALSE;
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}
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for (i = 0; i < overlay->image_height; ++i) {
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@ -670,14 +714,13 @@ gst_gl_overlay_load_jpeg (GstGLFilter * filter)
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jpeg_finish_decompress (&cinfo);
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jpeg_destroy_decompress (&cinfo);
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gst_memory_unmap ((GstMemory *) overlay->image_memory, &map_info);
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fclose (fp);
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return TRUE;
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}
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static gboolean
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gst_gl_overlay_load_png (GstGLFilter * filter)
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gst_gl_overlay_load_png (GstGLOverlay * overlay, FILE * fp)
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{
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GstGLOverlay *overlay = GST_GL_OVERLAY (filter);
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GstVideoInfo v_info;
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GstMapInfo map_info;
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@ -688,46 +731,48 @@ gst_gl_overlay_load_png (GstGLFilter * filter)
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gint bit_depth = 0;
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gint color_type = 0;
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gint interlace_type = 0;
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png_FILE_p fp = NULL;
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guint y = 0;
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guchar **rows = NULL;
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gint filler;
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png_byte magic[8];
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gint n_read;
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if (!GST_GL_BASE_FILTER (filter)->context)
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if (!GST_GL_BASE_FILTER (overlay)->context)
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return FALSE;
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if ((fp = fopen (overlay->location, "rb")) == NULL)
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LOAD_ERROR ("file not found");
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/* Read magic number */
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n_read = fread (magic, 1, sizeof (magic), fp);
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if (n_read != sizeof (magic)) {
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fclose (fp);
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LOAD_ERROR ("can't read PNG magic number");
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GST_ELEMENT_ERROR (overlay, STREAM, DECODE,
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("can't read PNG magic number"), ("File: %s", overlay->location));
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return FALSE;
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}
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/* Check for valid magic number */
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if (png_sig_cmp (magic, 0, sizeof (magic))) {
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fclose (fp);
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LOAD_ERROR ("not a valid PNG image");
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GST_ELEMENT_ERROR (overlay, STREAM, DECODE,
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("not a valid PNG image"), ("File: %s", overlay->location));
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return FALSE;
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}
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png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
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if (png_ptr == NULL) {
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fclose (fp);
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LOAD_ERROR ("failed to initialize the png_struct");
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GST_ELEMENT_ERROR (overlay, STREAM, DECODE,
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("failed to initialize the png_struct"), ("File: %s",
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overlay->location));
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return FALSE;
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}
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png_set_error_fn (png_ptr, NULL, NULL, user_warning_fn);
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info_ptr = png_create_info_struct (png_ptr);
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if (info_ptr == NULL) {
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fclose (fp);
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png_destroy_read_struct (&png_ptr, png_infopp_NULL, png_infopp_NULL);
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LOAD_ERROR ("failed to initialize the memory for image information");
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GST_ELEMENT_ERROR (overlay, STREAM, DECODE,
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("failed to initialize the memory for image information"),
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("File: %s", overlay->location));
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return FALSE;
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}
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png_init_io (png_ptr, fp);
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@ -746,22 +791,25 @@ gst_gl_overlay_load_png (GstGLFilter * filter)
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}
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if (color_type != PNG_COLOR_TYPE_RGB_ALPHA) {
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fclose (fp);
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png_destroy_read_struct (&png_ptr, png_infopp_NULL, png_infopp_NULL);
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LOAD_ERROR ("color type is not rgb");
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GST_ELEMENT_ERROR (overlay, STREAM, DECODE,
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("color type is not rgb"), ("File: %s", overlay->location));
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return FALSE;
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}
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overlay->image_width = width;
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overlay->image_height = height;
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gst_video_info_set_format (&v_info, GST_VIDEO_FORMAT_RGBA, width, height);
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overlay->image_memory =
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(GstGLMemory *) gst_gl_memory_alloc (GST_GL_BASE_FILTER (filter)->context,
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overlay->image_memory = (GstGLMemory *)
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gst_gl_memory_alloc (GST_GL_BASE_FILTER (overlay)->context,
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NULL, &v_info, 0, NULL);
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if (!gst_memory_map ((GstMemory *) overlay->image_memory, &map_info,
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GST_MAP_WRITE)) {
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LOAD_ERROR ("failed to map memory");
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GST_ELEMENT_ERROR (overlay, STREAM, DECODE,
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("failed to map memory"), ("File: %s", overlay->location));
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return FALSE;
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}
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rows = (guchar **) malloc (sizeof (guchar *) * height);
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@ -775,7 +823,6 @@ gst_gl_overlay_load_png (GstGLFilter * filter)
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png_read_end (png_ptr, info_ptr);
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png_destroy_read_struct (&png_ptr, &info_ptr, png_infopp_NULL);
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fclose (fp);
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return TRUE;
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}
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