[FFmpeg-cvslog] rtp: Only choose static payload types if the sample rate and channels are right

[Adriano Pallavicino]

ffmpeg | branch: master | Adriano Pallavicino <adrianopallavicino at gmail.com> | Tue Jul 17 09:51:13 2012 +0200| [999c63e4ca1b0500da73227d0b48591a0e695928] | committer: Martin Storsjö

rtp: Only choose static payload types if the sample rate and channels are right

If using a different sample rate or number of channels, use a dynamic
payload type instead, where the parameters are passed in the SDP.

G722 is a special case where the normal rules don't apply.

Signed-off-by: Martin Storsjö <martin at martin.st>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=999c63e4ca1b0500da73227d0b48591a0e695928
---

 libavformat/rtp.c |   14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/libavformat/rtp.c b/libavformat/rtp.c
index efc84ab..b7ebed1 100644
--- a/libavformat/rtp.c
+++ b/libavformat/rtp.c
@@ -110,9 +110,17 @@ int ff_rtp_get_payload_type(AVFormatContext *fmt, AVCodecContext *codec)
                 !fmt->oformat->priv_class ||
                 !av_opt_flag_is_set(fmt->priv_data, "rtpflags", "rfc2190")))
                 continue;
-            if (codec->codec_id == CODEC_ID_PCM_S16BE)
-                if (codec->channels != AVRtpPayloadTypes[i].audio_channels)
-                    continue;
+            /* G722 has 8000 as nominal rate even if the sample rate is 16000,
+             * see section 4.5.2 in RFC 3551. */
+            if (codec->codec_id == CODEC_ID_ADPCM_G722 &&
+                codec->sample_rate == 16000 && codec->channels == 1)
+                return AVRtpPayloadTypes[i].pt;
+            if (codec->codec_type == AVMEDIA_TYPE_AUDIO &&
+                ((AVRtpPayloadTypes[i].clock_rate > 0 &&
+                  codec->sample_rate != AVRtpPayloadTypes[i].clock_rate) ||
+                 (AVRtpPayloadTypes[i].audio_channels > 0 &&
+                  codec->channels != AVRtpPayloadTypes[i].audio_channels)))
+                continue;
             return AVRtpPayloadTypes[i].pt;
         }