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buffer: we call _span always with 0 offset

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This commit is contained in:
Wim Taymans 2012-03-28 15:08:44 +02:00
parent a4c861a4d3
commit 8fc290a27f
1 changed files with 18 additions and 21 deletions
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39
gst/gstbuffer.c
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@ -119,7 +119,7 @@
GType _gst_buffer_type = 0; GType _gst_buffer_type = 0;
static GstMemory *_gst_buffer_arr_span (GstMemory ** mem[], gsize len[], static GstMemory *_gst_buffer_arr_span (GstMemory ** mem[], gsize len[],
guint n, gsize offset, gsize size); guint n, gsize size);
typedef struct _GstMetaItem GstMetaItem; typedef struct _GstMetaItem GstMetaItem;
@ -155,7 +155,7 @@ typedef struct
} GstBufferImpl; } GstBufferImpl;
static GstMemory * static GstMemory *
_span_memory (GstBuffer * buffer, gsize offset, gsize size) _span_memory (GstBuffer * buffer, gsize size)
{ {
GstMemory *span, **mem[1]; GstMemory *span, **mem[1];
gsize len[1]; gsize len[1];
@ -167,7 +167,7 @@ _span_memory (GstBuffer * buffer, gsize offset, gsize size)
if (size == -1) if (size == -1)
size = gst_buffer_get_size (buffer); size = gst_buffer_get_size (buffer);
span = _gst_buffer_arr_span (mem, len, 1, offset, size); span = _gst_buffer_arr_span (mem, len, 1, size);
return span; return span;
} }
@ -190,7 +190,7 @@ _get_merged_memory (GstBuffer * buffer, gboolean * merged)
*merged = FALSE; *merged = FALSE;
} else { } else {
/* we need to span memory */ /* we need to span memory */
mem = _span_memory (buffer, 0, -1); mem = _span_memory (buffer, -1);
*merged = TRUE; *merged = TRUE;
} }
return mem; return mem;
@ -230,7 +230,7 @@ _memory_add (GstBuffer * buffer, guint idx, GstMemory * mem)
* could try to only merge the two smallest buffers to avoid memcpy, etc. */ * could try to only merge the two smallest buffers to avoid memcpy, etc. */
GST_CAT_DEBUG (GST_CAT_PERFORMANCE, "memory array overflow in buffer %p", GST_CAT_DEBUG (GST_CAT_PERFORMANCE, "memory array overflow in buffer %p",
buffer); buffer);
_replace_all_memory (buffer, _span_memory (buffer, 0, -1)); _replace_all_memory (buffer, _span_memory (buffer, -1));
/* we now have 1 single spanned buffer */ /* we now have 1 single spanned buffer */
len = 1; len = 1;
} }
@ -265,6 +265,9 @@ _priv_gst_buffer_initialize (void)
* *
* Copies the information from @src into @dest. * Copies the information from @src into @dest.
* *
* If @dest already contains memory and @flags contains GST_BUFFER_COPY_MEMORY,
* the memory from @src will be appended to @dest.
*
* @flags indicate which fields will be copied. * @flags indicate which fields will be copied.
*/ */
void void
@ -357,7 +360,7 @@ gst_buffer_copy_into (GstBuffer * dest, GstBuffer * src,
} }
} }
if (flags & GST_BUFFER_COPY_MERGE) { if (flags & GST_BUFFER_COPY_MERGE) {
_replace_all_memory (dest, _span_memory (dest, 0, size)); _replace_all_memory (dest, _span_memory (dest, size));
} }
} }
@ -1330,8 +1333,7 @@ _gst_buffer_arr_is_span_fast (GstMemory ** mem[], gsize len[], guint n,
} }
static GstMemory * static GstMemory *
_gst_buffer_arr_span (GstMemory ** mem[], gsize len[], guint n, gsize offset, _gst_buffer_arr_span (GstMemory ** mem[], gsize len[], guint n, gsize size)
gsize size)
{ {
GstMemory *span, *parent = NULL; GstMemory *span, *parent = NULL;
gsize poffset = 0; gsize poffset = 0;
@ -1339,9 +1341,9 @@ _gst_buffer_arr_span (GstMemory ** mem[], gsize len[], guint n, gsize offset,
if (_gst_buffer_arr_is_span_fast (mem, len, n, &poffset, &parent)) { if (_gst_buffer_arr_is_span_fast (mem, len, n, &poffset, &parent)) {
if (parent->flags & GST_MEMORY_FLAG_NO_SHARE) { if (parent->flags & GST_MEMORY_FLAG_NO_SHARE) {
GST_CAT_DEBUG (GST_CAT_PERFORMANCE, "copy for span %p", parent); GST_CAT_DEBUG (GST_CAT_PERFORMANCE, "copy for span %p", parent);
span = gst_memory_copy (parent, offset + poffset, size); span = gst_memory_copy (parent, poffset, size);
} else { } else {
span = gst_memory_share (parent, offset + poffset, size); span = gst_memory_share (parent, poffset, size);
} }
} else { } else {
gsize count, left; gsize count, left;
@ -1365,16 +1367,11 @@ _gst_buffer_arr_span (GstMemory ** mem[], gsize len[], guint n, gsize offset,
for (i = 0; i < clen && left > 0; i++) { for (i = 0; i < clen && left > 0; i++) {
gst_memory_map (cmem[i], &sinfo, GST_MAP_READ); gst_memory_map (cmem[i], &sinfo, GST_MAP_READ);
tocopy = MIN (sinfo.size, left); tocopy = MIN (sinfo.size, left);
if (tocopy > offset) { GST_CAT_DEBUG (GST_CAT_PERFORMANCE,
GST_CAT_DEBUG (GST_CAT_PERFORMANCE, "memcpy for span %p from memory %p", span, cmem[i]);
"memcpy for span %p from memory %p", span, cmem[i]); memcpy (ptr, (guint8 *) sinfo.data, tocopy);
memcpy (ptr, (guint8 *) sinfo.data + offset, tocopy - offset); left -= tocopy;
left -= tocopy; ptr += tocopy;
ptr += tocopy;
offset = 0;
} else {
offset -= tocopy;
}
gst_memory_unmap (cmem[i], &sinfo); gst_memory_unmap (cmem[i], &sinfo);
} }
} }
@ -1414,7 +1411,7 @@ gst_buffer_append (GstBuffer * buf1, GstBuffer * buf2)
_memory_add (buf1, -1, mem); _memory_add (buf1, -1, mem);
} }
/* we can calculate the duration too. Also make sure we's not messing /* we can calculate the duration too. Also make sure we're not messing
* with invalid DURATIONS */ * with invalid DURATIONS */
if (GST_BUFFER_DURATION_IS_VALID (buf1) && if (GST_BUFFER_DURATION_IS_VALID (buf1) &&
GST_BUFFER_DURATION_IS_VALID (buf2)) { GST_BUFFER_DURATION_IS_VALID (buf2)) {