[PATCH 2/2] Parse MDPR configuration for audio/x-ralf-mpeg4.

[Jai Menon]

---
 libavformat/rmdec.c |   30 ++++++++++++++++++++++++++++++
 1 files changed, 30 insertions(+), 0 deletions(-)

diff --git a/libavformat/rmdec.c b/libavformat/rmdec.c
index 1da024a..c6f7f7b 100644
--- a/libavformat/rmdec.c
+++ b/libavformat/rmdec.c
@@ -300,6 +300,36 @@ ff_rm_read_mdpr_codecdata (AVFormatContext *s, ByteIOContext *pb,
         /* ra type header */
         if (rm_read_audio_stream_info(s, pb, st, rst, 0))
             return -1;
+    } else if (v == AV_RB32("LSD:")) {
+        if (codec_data_size < 24) {
+             av_log(s, AV_LOG_ERROR, "Config data size too small.\n");
+             return -1;
+        }
+        st->codec->codec_type = CODEC_TYPE_AUDIO;
+        st->codec->codec_id   = CODEC_ID_RALF;
+        if (get_be16(pb) == 259) {
+            get_be16(pb); // unused
+            st->codec->channels = get_be16(pb);
+            if (!st->codec->channels || st->codec->channels > 2) {
+                av_log(s, AV_LOG_ERROR, "Only mono and stereo RALF streams are supported.\n");
+                return -1;
+            }
+            st->codec->bits_per_coded_sample = get_be16(pb);
+            if (st->codec->bits_per_coded_sample != 16) {
+                av_log(s, AV_LOG_ERROR, "Invalid sample depth.\n");
+                return -1;
+            }
+            st->codec->sample_rate = get_be32(pb);
+            if (st->codec->sample_rate < 8000 || st->codec->sample_rate > 96000) {
+                av_log(s, AV_LOG_ERROR, "Invalid sampling rate.\n");
+                return -1;
+            }
+            get_be32(pb);  // Max. audio frame size (in bytes)
+            get_be32(pb);  // unused
+        } else {
+            av_log(s, AV_LOG_ERROR, "Incorrect RALF config data.\n");
+            return -1;
+        }
     } else {
         int fps, fps2;
         if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) {
-- 
1.6.5.2


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