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glmemorypbo: map/unmap pbo memory correctly for state tracking

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Otherwise some downloads will fail to occur from the PBO.
This commit is contained in:
Matthew Waters 2015-12-14 18:18:20 +11:00 committed by Tim-Philipp Müller
parent ba03bc2cba
commit f83b834628
1 changed files with 11 additions and 1 deletions
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12
gst-libs/gst/gl/gstglmemorypbo.c
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@ -317,22 +317,32 @@ _pbo_download_transfer (GstGLMemoryPBO * gl_mem, GstMapInfo * info, gsize size)
{
GstMapInfo *pbo_info;
gl_mem->pbo->target = GL_PIXEL_PACK_BUFFER;
/* texture -> pbo */
if (info->flags & GST_MAP_READ
&& GST_MEMORY_FLAG_IS_SET (gl_mem,
GST_GL_BASE_MEMORY_TRANSFER_NEED_DOWNLOAD)) {
GstMapInfo info;
GST_CAT_TRACE (GST_CAT_GL_MEMORY,
"attempting download of texture %u " "using pbo %u", gl_mem->mem.tex_id,
gl_mem->pbo->id);
if (!gst_memory_map (GST_MEMORY_CAST (gl_mem->pbo), &info,
GST_MAP_WRITE | GST_MAP_GL)) {
GST_CAT_WARNING (GST_CAT_GL_MEMORY, "Failed to write to PBO");
return NULL;
}
if (!_read_pixels_to_pbo (gl_mem))
return NULL;
gst_memory_unmap (GST_MEMORY_CAST (gl_mem->pbo), &info);
}
pbo_info = g_new0 (GstMapInfo, 1);
/* pbo -> data */
gl_mem->pbo->target = GL_PIXEL_PACK_BUFFER;
/* get a cpu accessible mapping from the pbo */
if (!gst_memory_map (GST_MEMORY_CAST (gl_mem->pbo), pbo_info, info->flags)) {
GST_CAT_ERROR (GST_CAT_GL_MEMORY, "Failed to map pbo");