1 files changed, 118 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavformat/rtp_mpv.c b/contrib/ffmpeg/libavformat/rtp_mpv.c
new file mode 100644
index 000000000..c8bf81f9a
--- /dev/null
+++ b/contrib/ffmpeg/libavformat/rtp_mpv.c
@@ -0,0 +1,118 @@
+/*
+ * RTP packetization for MPEG video
+ * Copyright (c) 2002 Fabrice Bellard.
+ * Copyright (c) 2007 Luca Abeni.
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include "avformat.h"
+#include "rtp_internal.h"
+
+#include "mpegvideo.h"
+
+/* NOTE: a single frame must be passed with sequence header if
+   needed. XXX: use slices. */
+void ff_rtp_send_mpegvideo(AVFormatContext *s1, const uint8_t *buf1, int size)
+{
+    RTPDemuxContext *s = s1->priv_data;
+    int len, h, max_packet_size;
+    uint8_t *q;
+    int begin_of_slice, end_of_slice, frame_type, temporal_reference;
+
+    max_packet_size = s->max_payload_size;
+    begin_of_slice = 1;
+    end_of_slice = 0;
+    frame_type = 0;
+    temporal_reference = 0;
+
+    while (size > 0) {
+        int begin_of_sequence;
+
+        begin_of_sequence = 0;
+        len = max_packet_size - 4;
+
+        if (len >= size) {
+            len = size;
+            end_of_slice = 1;
+        } else {
+            const uint8_t *r, *r1;
+            int start_code;
+
+            r1 = buf1;
+            while (1) {
+                start_code = -1;
+                r = ff_find_start_code(r1, buf1 + size, &start_code);
+                if((start_code & 0xFFFFFF00) == 0x100) {
+                    /* New start code found */
+                    if (start_code == 0x100) {
+                        frame_type = (r[1] & 0x38) >> 3;
+                        temporal_reference = (int)r[0] << 2 | r[1] >> 6;
+                    }
+                    if (start_code == 0x1B8) {
+                        begin_of_sequence = 1;
+                    }
+
+                    if (r - buf1 < len) {
+                        /* The current slice fits in the packet */
+                        if (begin_of_slice == 0) {
+                            /* no slice at the beginning of the packet... */
+                            end_of_slice = 1;
+                            len = r - buf1 - 4;
+                            break;
+                        }
+                        r1 = r;
+                    } else {
+                        if (r - r1 < max_packet_size) {
+                            len = r1 - buf1 - 4;
+                            end_of_slice = 1;
+                        }
+                        break;
+                    }
+                } else {
+                    break;
+                }
+            }
+        }
+
+        h = 0;
+        h |= temporal_reference << 16;
+        h |= begin_of_sequence << 13;
+        h |= begin_of_slice << 12;
+        h |= end_of_slice << 11;
+        h |= frame_type << 8;
+
+        q = s->buf;
+        *q++ = h >> 24;
+        *q++ = h >> 16;
+        *q++ = h >> 8;
+        *q++ = h;
+
+        memcpy(q, buf1, len);
+        q += len;
+
+        /* 90 KHz time stamp */
+        s->timestamp = s->cur_timestamp;
+        ff_rtp_send_data(s1, s->buf, q - s->buf, (len == size));
+
+        buf1 += len;
+        size -= len;
+        begin_of_slice = end_of_slice;
+        end_of_slice = 0;
+    }
+}
+
+