lavf: use designated initializers for AVClasses.

[ffmpeg] / libavformat / rtp.h

diff --git a/libavformat/rtp.h b/libavformat/rtp.h
index 834fb1b0d3c298454648f9601638f45e1091a7a8..36157ce172760d907a67a8ddf2948dbc82101bae 100644 (file)
--- a/libavformat/rtp.h
+++ b/libavformat/rtp.h
@@ -2,20 +2,20 @@
  * RTP definitions
  * Copyright (c) 2002 Fabrice Bellard
  *
- * This file is part of FFmpeg.
+ * This file is part of Libav.
  *
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 #ifndef AVFORMAT_RTP_H
@@ -23,10 +23,50 @@
 
 #include "libavcodec/avcodec.h"
 
-#define RTP_MAX_PACKET_LENGTH 1500 /* XXX: suppress this define */
+/**
+ * Return the payload type for a given codec.
+ *
+ * @param codec The context of the codec
+ * @return In case of unknown payload type or dynamic payload type, a
+ * negative value is returned; otherwise, the payload type (the 'PT' field
+ * in the RTP header) is returned.
+ */
+int ff_rtp_get_payload_type(AVCodecContext *codec);
+
+/**
+ * Initialize a codec context based on the payload type.
+ *
+ * Fill the codec_type and codec_id fields of a codec context with
+ * information depending on the payload type; for audio codecs, the
+ * channels and sample_rate fields are also filled.
+ *
+ * @param codec The context of the codec
+ * @param payload_type The payload type (the 'PT' field in the RTP header)
+ * @return In case of unknown payload type or dynamic payload type, a
+ * negative value is returned; otherwise, 0 is returned
+ */
+int ff_rtp_get_codec_info(AVCodecContext *codec, int payload_type);
+
+/**
+ * Return the encoding name (as defined in
+ * http://www.iana.org/assignments/rtp-parameters) for a given payload type.
+ *
+ * @param payload_type The payload type (the 'PT' field in the RTP header)
+ * @return In case of unknown payload type or dynamic payload type, a pointer
+ * to an empty string is returned; otherwise, a pointer to a string containing
+ * the encoding name is returned
+ */
+const char *ff_rtp_enc_name(int payload_type);
 
-/** return < 0 if unknown payload type */
-int rtp_get_payload_type(AVCodecContext *codec);
+/**
+ * Return the codec id for the given encoding name and codec type.
+ *
+ * @param buf A pointer to the string containing the encoding name
+ * @param codec_type The codec type
+ * @return In case of unknown encoding name, CODEC_ID_NONE is returned;
+ * otherwise, the codec id is returned
+ */
+enum CodecID ff_rtp_codec_id(const char *buf, enum AVMediaType codec_type);
 
 #define RTP_PT_PRIVATE 96
 #define RTP_VERSION 2
@@ -36,4 +76,19 @@ int rtp_get_payload_type(AVCodecContext *codec);
 #define RTCP_TX_RATIO_NUM 5
 #define RTCP_TX_RATIO_DEN 1000
 
+/* An arbitrary id value for RTP Xiph streams - only relevant to indicate
+ * the the configuration has changed within a stream (by changing the
+ * ident value sent).
+ */
+#define RTP_XIPH_IDENT 0xfecdba
+
+/* RTCP packet types */
+enum RTCPType {
+    RTCP_SR     = 200,
+    RTCP_RR,   // 201
+    RTCP_SDES, // 202
+    RTCP_BYE,  // 203
+    RTCP_APP   // 204
+};
+
 #endif /* AVFORMAT_RTP_H */