lavf/rtpenc: Add support for 24 bit pcm encoding as defined by RFC 3190.

Fixes ticket #6770.

libavformat/rtpenc.c

@@ -66,6 +66,7 @@ static int is_supported(enum AVCodecID id)
     case AV_CODEC_ID_PCM_S8:
     case AV_CODEC_ID_PCM_S16BE:
     case AV_CODEC_ID_PCM_S16LE:
+    case AV_CODEC_ID_PCM_S24BE:
     case AV_CODEC_ID_PCM_U16BE:
     case AV_CODEC_ID_PCM_U16LE:
     case AV_CODEC_ID_PCM_U8:
@@ -544,6 +545,8 @@ static int rtp_write_packet(AVFormatContext *s1, AVPacket *pkt)
     case AV_CODEC_ID_PCM_S16BE:
     case AV_CODEC_ID_PCM_S16LE:
         return rtp_send_samples(s1, pkt->data, size, 16 * st->codecpar->channels);
+    case AV_CODEC_ID_PCM_S24BE:
+        return rtp_send_samples(s1, pkt->data, size, 24 * st->codecpar->channels);
     case AV_CODEC_ID_ADPCM_G722:
         /* The actual sample size is half a byte per sample, but since the
          * stream clock rate is 8000 Hz while the sample rate is 16000 Hz,

libavformat/sdp.c

@@ -584,6 +584,12 @@ static char *sdp_write_media_attributes(char *buff, int size, AVStream *st, int
                                          payload_type,
                                          p->sample_rate, p->channels);
             break;
+        case AV_CODEC_ID_PCM_S24BE:
+            if (payload_type >= RTP_PT_PRIVATE)
+                av_strlcatf(buff, size, "a=rtpmap:%d L24/%d/%d\r\n",
+                                         payload_type,
+                                         p->sample_rate, p->channels);
+            break;
         case AV_CODEC_ID_PCM_MULAW:
             if (payload_type >= RTP_PT_PRIVATE)
                 av_strlcatf(buff, size, "a=rtpmap:%d PCMU/%d/%d\r\n",

libavformat/version.h

@@ -33,7 +33,7 @@
 // Also please add any ticket numbers that you believe might be affected here
 #define LIBAVFORMAT_VERSION_MAJOR  58
 #define LIBAVFORMAT_VERSION_MINOR   0
-#define LIBAVFORMAT_VERSION_MICRO 101
+#define LIBAVFORMAT_VERSION_MICRO 102
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
                                                LIBAVFORMAT_VERSION_MINOR, \