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rtph264depay: assemble AUs into downstream-allocated memory

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When merging NALs into AUs, use downstream-provided allocator
to allocate memory and copy NALs directly into that memory when
assembling them.
This commit is contained in:
Tim-Philipp Müller 2017-06-03 00:58:05 +01:00
parent b6f13ce4e9
commit f3e4df72a1
1 changed files with 56 additions and 2 deletions
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58
gst/rtp/gstrtph264depay.c
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@ -774,17 +774,71 @@ incomplete_caps:
}
}
static GstBuffer *
gst_rtp_h264_depay_allocate_output_buffer (GstRtpH264Depay * depay, gsize size)
{
GstBuffer *buffer = NULL;
g_return_val_if_fail (size > 0, NULL);
GST_LOG_OBJECT (depay, "want output buffer of %u bytes", (guint) size);
buffer = gst_buffer_new_allocate (depay->allocator, size, &depay->params);
if (buffer == NULL) {
GST_INFO_OBJECT (depay, "couldn't allocate output buffer");
buffer = gst_buffer_new_allocate (NULL, size, NULL);
}
return buffer;
}
static GstBuffer *
gst_rtp_h264_complete_au (GstRtpH264Depay * rtph264depay,
GstClockTime * out_timestamp, gboolean * out_keyframe)
{
guint outsize;
GstBufferList *list;
GstMapInfo outmap;
GstBuffer *outbuf;
guint outsize, offset = 0;
gint b, n_bufs, m, n_mem;
/* we had a picture in the adapter and we completed it */
GST_DEBUG_OBJECT (rtph264depay, "taking completed AU");
outsize = gst_adapter_available (rtph264depay->picture_adapter);
outbuf = gst_adapter_take_buffer (rtph264depay->picture_adapter, outsize);
outbuf = gst_rtp_h264_depay_allocate_output_buffer (rtph264depay, outsize);
if (outbuf == NULL)
return NULL;
if (!gst_buffer_map (outbuf, &outmap, GST_MAP_WRITE))
return NULL;
list = gst_adapter_take_buffer_list (rtph264depay->picture_adapter, outsize);
n_bufs = gst_buffer_list_length (list);
for (b = 0; b < n_bufs; ++b) {
GstBuffer *buf = gst_buffer_list_get (list, b);
n_mem = gst_buffer_n_memory (buf);
for (m = 0; m < n_mem; ++m) {
GstMemory *mem = gst_buffer_peek_memory (buf, m);
gsize mem_size = gst_memory_get_sizes (mem, NULL, NULL);
GstMapInfo mem_map;
if (gst_memory_map (mem, &mem_map, GST_MAP_READ)) {
memcpy (outmap.data + offset, mem_map.data, mem_size);
gst_memory_unmap (mem, &mem_map);
} else {
memset (outmap.data + offset, 0, mem_size);
}
offset += mem_size;
}
gst_rtp_copy_video_meta (rtph264depay, outbuf, buf);
}
gst_buffer_list_unref (list);
gst_buffer_unmap (outbuf, &outmap);
*out_timestamp = rtph264depay->last_ts;
*out_keyframe = rtph264depay->last_keyframe;