Merge commit 'f322b207'

* commit 'f322b207':
  lavr: only save/restore the mixing matrix if mixing is being done
  rtpdec_vp8: Cosmetics: Fix bad alignment/indentation
  rtpenc: Allow including a SDES/CNAME block in RTCP SR packets
Merged-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/rtpenc.c

@@ -34,6 +34,7 @@ static const AVOption options[] = {
     FF_RTP_FLAG_OPTS(RTPMuxContext, flags),
     { "payload_type", "Specify RTP payload type", offsetof(RTPMuxContext, payload_type), AV_OPT_TYPE_INT, {.i64 = -1 }, -1, 127, AV_OPT_FLAG_ENCODING_PARAM },
     { "ssrc", "Stream identifier", offsetof(RTPMuxContext, ssrc), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
+    { "cname", "CNAME to include in RTCP SR packets", offsetof(RTPMuxContext, cname), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
     { NULL },
 };
 
@@ -271,6 +272,22 @@ static void rtcp_send_sr(AVFormatContext *s1, int64_t ntp_time)
     avio_wb32(s1->pb, rtp_ts);
     avio_wb32(s1->pb, s->packet_count);
     avio_wb32(s1->pb, s->octet_count);
+
+    if (s->cname) {
+        int len = FFMIN(strlen(s->cname), 255);
+        avio_w8(s1->pb, (RTP_VERSION << 6) + 1);
+        avio_w8(s1->pb, RTCP_SDES);
+        avio_wb16(s1->pb, (7 + len + 3) / 4); /* length in words - 1 */
+
+        avio_wb32(s1->pb, s->ssrc);
+        avio_w8(s1->pb, 0x01); /* CNAME */
+        avio_w8(s1->pb, len);
+        avio_write(s1->pb, s->cname, len);
+        avio_w8(s1->pb, 0); /* END */
+        for (len = (7 + len) % 4; len % 4; len++)
+            avio_w8(s1->pb, 0);
+    }
+
     avio_flush(s1->pb);
 }
 

libavformat/rtpenc.h

@@ -30,6 +30,7 @@ struct RTPMuxContext {
     AVStream *st;
     int payload_type;
     uint32_t ssrc;
+    const char *cname;
     uint16_t seq;
     uint32_t timestamp;
     uint32_t base_timestamp;

libavresample/resample.c

@@ -259,6 +259,7 @@ int avresample_set_compensation(AVAudioResampleContext *avr, int sample_delta,
        AVAudioResampleContext and force resampling */
     if (!avr->resample_needed) {
         int fifo_samples;
+        int restore_matrix = 0;
         double matrix[AVRESAMPLE_MAX_CHANNELS * AVRESAMPLE_MAX_CHANNELS] = { 0 };
 
         /* buffer any remaining samples in the output FIFO before closing */
@@ -274,9 +275,12 @@ int avresample_set_compensation(AVAudioResampleContext *avr, int sample_delta,
                 goto reinit_fail;
         }
         /* save the channel mixing matrix */
+        if (avr->am) {
             ret = avresample_get_matrix(avr, matrix, AVRESAMPLE_MAX_CHANNELS);
             if (ret < 0)
                 goto reinit_fail;
+            restore_matrix = 1;
+        }
 
         /* close the AVAudioResampleContext */
         avresample_close(avr);
@@ -284,9 +288,11 @@ int avresample_set_compensation(AVAudioResampleContext *avr, int sample_delta,
         avr->force_resampling = 1;
 
         /* restore the channel mixing matrix */
+        if (restore_matrix) {
             ret = avresample_set_matrix(avr, matrix, AVRESAMPLE_MAX_CHANNELS);
             if (ret < 0)
                 goto reinit_fail;
+        }
 
         /* re-open the AVAudioResampleContext */
         ret = avresample_open(avr);