From 88141c9192549eb8adc492528568db4c45cb1f55 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Fri, 20 Jan 2006 23:48:16 +0000
Subject: [PATCH] audio in dvr-ms demuxing support by (John Donaghy
 <johnfdonaghy gmail com<)

Originally committed as revision 4874 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavformat/asf.c | 65 +++++++++++++++++++++++++++++++++++++++++++++--
 libavformat/asf.h | 12 +++++++++
 2 files changed, 75 insertions(+), 2 deletions(-)

diff --git a/libavformat/asf.c b/libavformat/asf.c
index b3e84e184e..a3edf77c63 100644
--- a/libavformat/asf.c
+++ b/libavformat/asf.c
@@ -60,6 +60,10 @@ static void print_guid(const GUID *g)
     else PRINT_IF_GUID(g, head1_guid);
     else PRINT_IF_GUID(g, head2_guid);
     else PRINT_IF_GUID(g, my_guid);
+    else PRINT_IF_GUID(g, ext_stream_header);
+    else PRINT_IF_GUID(g, extended_content_header);
+    else PRINT_IF_GUID(g, ext_stream_embed_stream_header);
+    else PRINT_IF_GUID(g, ext_stream_audio_stream);
     else
         printf("(GUID: unknown) ");
     printf("0x%08x, 0x%04x, 0x%04x, {", g->v1, g->v2, g->v3);
@@ -186,6 +190,7 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
             int type, total_size, type_specific_size, sizeX;
             unsigned int tag1;
             int64_t pos1, pos2;
+            int test_for_ext_stream_audio;
 
             pos1 = url_ftell(pb);
 
@@ -201,12 +206,17 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
             st->duration = asf->hdr.send_time /
                 (10000000 / 1000) - st->start_time;
             get_guid(pb, &g);
+
+            test_for_ext_stream_audio = 0;
             if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
                 type = CODEC_TYPE_AUDIO;
             } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
                 type = CODEC_TYPE_VIDEO;
             } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
                 type = CODEC_TYPE_UNKNOWN;
+            } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
+                test_for_ext_stream_audio = 1;
+                type = CODEC_TYPE_UNKNOWN;
             } else {
                 goto fail;
             }
@@ -219,6 +229,20 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
             asf->asfid2avid[st->id] = s->nb_streams - 1;
 
             get_le32(pb);
+
+            if (test_for_ext_stream_audio) {
+                get_guid(pb, &g);
+                if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
+                    type = CODEC_TYPE_AUDIO;
+                    get_guid(pb, &g);
+                    get_le32(pb);
+                    get_le32(pb);
+                    get_le32(pb);
+                    get_guid(pb, &g);
+                    get_le32(pb);
+                }
+            }
+
             st->codec->codec_type = type;
             if (type == CODEC_TYPE_AUDIO) {
                 get_wav_header(pb, st->codec, type_specific_size);
@@ -259,7 +283,7 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
                     st->codec->frame_size = 1;
                     break;
                 }
-            } else {
+            } else if (type == CODEC_TYPE_VIDEO) {
                 get_le32(pb);
                 get_le32(pb);
                 get_byte(pb);
@@ -349,12 +373,49 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
                         }
                         av_free(name);
                 }
-#if 0
+        } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
+            int ext_len, payload_ext_ct, stream_ct;
+            uint32_t ext_d;
+            int64_t pos_ex_st, pos_curr;
+            pos_ex_st = url_ftell(pb);
+
+            get_le64(pb);
+            get_le64(pb);
+            get_le32(pb);
+            get_le32(pb);
+            get_le32(pb);
+            get_le32(pb);
+            get_le32(pb);
+            get_le32(pb);
+            get_le32(pb);
+            get_le32(pb);
+            get_le16(pb);
+            get_le16(pb);
+            get_le64(pb);
+            stream_ct = get_le16(pb);
+            payload_ext_ct = get_le16(pb);
+
+            for (i=0; i<stream_ct; i++){
+                get_le16(pb);
+                ext_len = get_le16(pb);
+                url_fseek(pb, ext_len, SEEK_CUR);
+            }
+
+            for (i=0; i<payload_ext_ct; i++){
+                get_guid(pb, &g);
+                ext_d=get_le16(pb);
+                ext_len=get_le32(pb);
+                url_fseek(pb, ext_len, SEEK_CUR);
+            }
+
+            // there could be a optional stream properties object to follow
+            // if so the next iteration will pick it up
         } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
             int v1, v2;
             get_guid(pb, &g);
             v1 = get_le32(pb);
             v2 = get_le16(pb);
+#if 0
         } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
             int len, v1, n, num;
             char str[256], *q;
diff --git a/libavformat/asf.h b/libavformat/asf.h
index c9661b97a2..8dcf7716f1 100644
--- a/libavformat/asf.h
+++ b/libavformat/asf.h
@@ -143,6 +143,10 @@ static const GUID stream_header = {
     0xB7DC0791, 0xA9B7, 0x11CF, { 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },
 };
 
+static const GUID ext_stream_header = {
+    0x14E6A5CB, 0xC672, 0x4332, { 0x83, 0x99, 0xA9, 0x69, 0x52, 0x06, 0x5B, 0x5A },
+};
+
 static const GUID audio_stream = {
     0xF8699E40, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
 };
@@ -200,6 +204,14 @@ static const GUID simple_index_header = {
         0x33000890, 0xE5B1, 0x11CF, { 0x89, 0xF4, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xCB },
 };
 
+static const GUID ext_stream_embed_stream_header = {
+        0x3afb65e2, 0x47ef, 0x40f2, { 0xac, 0x2c, 0x70, 0xa9, 0x0d, 0x71, 0xd3, 0x43}
+};
+
+static const GUID ext_stream_audio_stream = {
+        0x31178c9d, 0x03e1, 0x4528, { 0xb5, 0x82, 0x3d, 0xf9, 0xdb, 0x22, 0xf5, 0x03}
+};
+
 /* I am not a number !!! This GUID is the one found on the PC used to
    generate the stream */
 static const GUID my_guid = {