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qtdemux: negotiate an allocator on the srcpads

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We do an ALLOCATION query to find out an allocator and parameters on the
srcpads. This way decoders (and sinks) can specify the memory and parameters
they want us to write into.
This commit is contained in:
Wim Taymans 2012-03-19 10:33:48 +01:00
parent 8f36d4c7a4
commit b8869d285b
1 changed files with 42 additions and 0 deletions
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42
gst/isomp4/qtdemux.c
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@ -248,6 +248,11 @@ struct _QtDemuxStream
guint bytes_per_frame;
guint compression;
/* allocation */
gboolean use_allocator;
GstAllocator *allocator;
GstAllocationParams params;
/* when a discontinuity is pending */
gboolean discont;
@ -1782,6 +1787,8 @@ gst_qtdemux_stbl_free (QtDemuxStream * stream)
static void
gst_qtdemux_stream_free (GstQTDemux * qtdemux, QtDemuxStream * stream)
{
if (stream->allocator)
gst_allocator_unref (stream->allocator);
while (stream->buffers) {
gst_buffer_unref (GST_BUFFER_CAST (stream->buffers->data));
stream->buffers = g_slist_delete_link (stream->buffers, stream->buffers);
@ -3759,6 +3766,11 @@ gst_qtdemux_loop_state_movie (GstQTDemux * qtdemux)
GST_LOG_OBJECT (qtdemux, "reading %d bytes @ %" G_GUINT64_FORMAT, size,
offset);
if (stream->use_allocator) {
/* if we have a per-stream allocator, use it */
buf = gst_buffer_new_allocate (stream->allocator, size, &stream->params);
}
ret = gst_qtdemux_pull_atom (qtdemux, offset, size, &buf);
if (G_UNLIKELY (ret != GST_FLOW_OK))
goto beach;
@ -4989,6 +5001,34 @@ qtdemux_tree_get_sibling_by_type (GNode * node, guint32 fourcc)
return qtdemux_tree_get_sibling_by_type_full (node, fourcc, NULL);
}
static void
qtdemux_do_allocation (GstQTDemux * qtdemux, QtDemuxStream * stream)
{
GstQuery *query;
query = gst_query_new_allocation (stream->caps, FALSE);
if (!gst_pad_peer_query (stream->pad, query)) {
/* not a problem, just debug a little */
GST_DEBUG_OBJECT (qtdemux, "peer ALLOCATION query failed");
}
if (stream->allocator)
gst_allocator_unref (stream->allocator);
if (gst_query_get_n_allocation_params (query) > 0) {
/* try the allocator */
gst_query_parse_nth_allocation_param (query, 0, &stream->allocator,
&stream->params);
stream->use_allocator = TRUE;
} else {
stream->allocator = NULL;
gst_allocation_params_init (&stream->params);
stream->use_allocator = FALSE;
}
gst_query_unref (query);
}
static gboolean
gst_qtdemux_add_stream (GstQTDemux * qtdemux,
QtDemuxStream * stream, GstTagList * list)
@ -5159,6 +5199,8 @@ gst_qtdemux_add_stream (GstQTDemux * qtdemux,
stream->pending_tags = list;
/* global tags go on each pad anyway */
stream->send_global_tags = TRUE;
qtdemux_do_allocation (qtdemux, stream);
}
done:
return TRUE;