From 30327865f388260e49d40affd1b9c9fc2e20ebfe Mon Sep 17 00:00:00 2001
From: Martin Storsjö <martin@martin.st>
Date: Tue, 3 Jul 2012 14:58:52 +0300
Subject: ismindex: Verify that all bitrate variants match
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In Smooth Streaming, the fragments are addressed by time, and
the manifest only stores one list of time offests for all streams,
so all streams need to have identical fragment offsets. Warn if
this isn't the case, so that the user can fix the files instead of
getting failures at runtime when the fragments can't be found.

Signed-off-by: Martin Storsjö <martin@martin.st>
---
 tools/ismindex.c | 30 ++++++++++++++++++++++++++----
 1 file changed, 26 insertions(+), 4 deletions(-)

(limited to 'tools/ismindex.c')

diff --git a/tools/ismindex.c b/tools/ismindex.c
index 1614cca8e9..54c49dc2f5 100644
--- a/tools/ismindex.c
+++ b/tools/ismindex.c
@@ -426,6 +426,7 @@ static void output_client_manifest(struct VideoFiles *files,
                  "Duration=\"%"PRId64 "\">\n", files->duration * 10);
     if (files->video_file >= 0) {
         struct VideoFile *vf = files->files[files->video_file];
+        struct VideoFile *first_vf = vf;
         int index = 0;
         fprintf(out,
                 "\t<StreamIndex Type=\"video\" QualityLevels=\"%d\" "
@@ -445,15 +446,26 @@ static void output_client_manifest(struct VideoFiles *files,
                 fprintf(out, "%02X", vf->codec_private[j]);
             fprintf(out, "\" />\n");
             index++;
+            if (vf->chunks != first_vf->chunks)
+                fprintf(stderr, "Mismatched number of video chunks in %s and %s\n",
+                        vf->name, first_vf->name);
         }
-        vf = files->files[files->video_file];
-        for (i = 0; i < vf->chunks; i++)
+        vf = first_vf;
+        for (i = 0; i < vf->chunks; i++) {
+            for (j = files->video_file + 1; j < files->nb_files; j++) {
+                if (files->files[j]->is_video &&
+                    vf->offsets[i].duration != files->files[j]->offsets[i].duration)
+                    fprintf(stderr, "Mismatched duration of video chunk %d in %s and %s\n",
+                            i, vf->name, files->files[j]->name);
+            }
             fprintf(out, "\t\t<c n=\"%d\" d=\"%d\" />\n", i,
                     vf->offsets[i].duration);
+        }
         fprintf(out, "\t</StreamIndex>\n");
     }
     if (files->audio_file >= 0) {
         struct VideoFile *vf = files->files[files->audio_file];
+        struct VideoFile *first_vf = vf;
         int index = 0;
         fprintf(out,
                 "\t<StreamIndex Type=\"audio\" QualityLevels=\"%d\" "
@@ -475,11 +487,21 @@ static void output_client_manifest(struct VideoFiles *files,
                 fprintf(out, "%02X", vf->codec_private[j]);
             fprintf(out, "\" />\n");
             index++;
+            if (vf->chunks != first_vf->chunks)
+                fprintf(stderr, "Mismatched number of audio chunks in %s and %s\n",
+                        vf->name, first_vf->name);
         }
-        vf = files->files[files->audio_file];
-        for (i = 0; i < vf->chunks; i++)
+        vf = first_vf;
+        for (i = 0; i < vf->chunks; i++) {
+            for (j = files->audio_file + 1; j < files->nb_files; j++) {
+                if (files->files[j]->is_audio &&
+                    vf->offsets[i].duration != files->files[j]->offsets[i].duration)
+                    fprintf(stderr, "Mismatched duration of audio chunk %d in %s and %s\n",
+                            i, vf->name, files->files[j]->name);
+            }
             fprintf(out, "\t\t<c n=\"%d\" d=\"%d\" />\n",
                     i, vf->offsets[i].duration);
+        }
         fprintf(out, "\t</StreamIndex>\n");
     }
     fprintf(out, "</SmoothStreamingMedia>\n");
-- 
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