Revert "avformat/dashdec: Avoid multiple HTTP requests for initialization segment that is common among all representations"

This reverts commit 4effd1c4a2c52a68c25ed0bc5474f6b4c64fd644.

1 files changed, 11 insertions, 71 deletions

diff --git a/libavformat/dashdec.c b/libavformat/dashdec.c
index 6304ad9..8bfde4d 100644
--- a/libavformat/dashdec.c
+++ b/libavformat/dashdec.c
@@ -149,11 +149,6 @@ typedef struct DASHContext {
     char *allowed_extensions;
     AVDictionary *avio_opts;
     int max_url_size;
-
-    /* Flags for init section*/
-    int is_init_section_common_video;
-    int is_init_section_common_audio;
-
 } DASHContext;
 
 static int ishttp(char *url)
@@ -421,9 +416,9 @@ static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
     if (av_strstart(proto_name, "file", NULL)) {
         if (strcmp(c->allowed_extensions, "ALL") && !av_match_ext(url, c->allowed_extensions)) {
             av_log(s, AV_LOG_ERROR,
-                   "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
-                   "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
-                   url);
+                "Filename extension of \'%s\' is not a common multimedia extension, blocked for security reasons.\n"
+                "If you wish to override this adjust allowed_extensions, you can set it to \'ALL\' to allow all\n",
+                url);
             return AVERROR_INVALIDDATA;
         }
     } else if (av_strstart(proto_name, "http", NULL)) {
@@ -936,7 +931,7 @@ static int parse_manifest_representation(AVFormatContext *s, const char *url,
                         rep->last_seq_no =(int64_t) strtoll(val, NULL, 10) - 1;
                         xmlFree(val);
                     }
-                }
+                 }
             }
 
             fragment_timeline_node = find_child_node_by_name(representation_segmenttemplate_node, "SegmentTimeline");
@@ -1165,7 +1160,7 @@ static int parse_manifest(AVFormatContext *s, const char *url, AVIOContext *in)
     } else {
         LIBXML_TEST_VERSION
 
-            doc = xmlReadMemory(buffer, filesize, c->base_url, NULL, 0);
+        doc = xmlReadMemory(buffer, filesize, c->base_url, NULL, 0);
         root_element = xmlDocGetRootElement(doc);
         node = root_element;
 
@@ -1401,14 +1396,14 @@ static int refresh_manifest(AVFormatContext *s)
 
     if (c->n_videos != n_videos) {
         av_log(c, AV_LOG_ERROR,
-               "new manifest has mismatched no. of video representations, %d -> %d\n",
-               n_videos, c->n_videos);
+            "new manifest has mismatched no. of video representations, %d -> %d\n",
+            n_videos, c->n_videos);
         return AVERROR_INVALIDDATA;
     }
     if (c->n_audios != n_audios) {
         av_log(c, AV_LOG_ERROR,
-               "new manifest has mismatched no. of audio representations, %d -> %d\n",
-               n_audios, c->n_audios);
+            "new manifest has mismatched no. of audio representations, %d -> %d\n",
+            n_audios, c->n_audios);
         return AVERROR_INVALIDDATA;
     }
 
@@ -1867,45 +1862,6 @@ fail:
     return ret;
 }
 
-static int init_section_compare_video(DASHContext *c)
-{
-    int i = 0;
-    char *url = c->videos[0]->init_section->url;
-    int64_t url_offset = c->videos[0]->init_section->url_offset;
-    int64_t size = c->videos[0]->init_section->size;
-    for (i=0;i<c->n_videos;i++) {
-        if (av_strcasecmp(c->videos[i]->init_section->url,url) || c->videos[i]->init_section->url_offset != url_offset || c->videos[i]->init_section->size != size) {
-            return 0;
-        }
-    }
-    return 1;
-}
-
-static int init_section_compare_audio(DASHContext *c)
-{
-    int i = 0;
-    char *url = c->audios[0]->init_section->url;
-    int64_t url_offset = c->audios[0]->init_section->url_offset;
-    int64_t size = c->audios[0]->init_section->size;
-    for (i=0;i<c->n_audios;i++) {
-        if (av_strcasecmp(c->audios[i]->init_section->url,url) || c->audios[i]->init_section->url_offset != url_offset || c->audios[i]->init_section->size != size) {
-            return 0;
-        }
-    }
-    return 1;
-}
-
-static void copy_init_section(struct representation *rep_dest, struct representation *rep_src)
-{
-    memcpy(rep_dest->init_section, rep_src->init_section, sizeof(rep_src->init_section));
-    rep_dest->init_sec_buf = av_mallocz(rep_src->init_sec_buf_size);
-    memcpy(rep_dest->init_sec_buf, rep_src->init_sec_buf, rep_src->init_sec_data_len);
-    rep_dest->init_sec_buf_size = rep_src->init_sec_buf_size;
-    rep_dest->init_sec_data_len = rep_src->init_sec_data_len;
-    rep_dest->cur_timestamp = rep_src->cur_timestamp;
-}
-
-
 static int dash_read_header(AVFormatContext *s)
 {
     void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb;
@@ -1934,35 +1890,19 @@ static int dash_read_header(AVFormatContext *s)
         s->duration = (int64_t) c->media_presentation_duration * AV_TIME_BASE;
     }
 
-    if (c->n_videos) {
-        c->is_init_section_common_video = init_section_compare_video(c);
-    }
-
     /* Open the demuxer for video and audio components if available */
     for (i = 0; i < c->n_videos; i++) {
         struct representation *cur_video = c->videos[i];
-        if (i > 0 && c->is_init_section_common_video) {
-            copy_init_section(cur_video,c->videos[0]);
-        }
         ret = open_demux_for_component(s, cur_video);
-
         if (ret)
             goto fail;
         cur_video->stream_index = stream_index;
         ++stream_index;
     }
 
-    if (c->n_audios) {
-        c->is_init_section_common_audio = init_section_compare_audio(c);
-    }
-
     for (i = 0; i < c->n_audios; i++) {
         struct representation *cur_audio = c->audios[i];
-        if (i > 0 && c->is_init_section_common_audio) {
-            copy_init_section(cur_audio,c->audios[0]);
-        }
         ret = open_demux_for_component(s, cur_audio);
-
         if (ret)
             goto fail;
         cur_audio->stream_index = stream_index;
@@ -1991,7 +1931,7 @@ static int dash_read_header(AVFormatContext *s)
                 av_dict_set_int(&pls->assoc_stream->metadata, "variant_bitrate", pls->bandwidth, 0);
             if (pls->id[0])
                 av_dict_set(&pls->assoc_stream->metadata, "id", pls->id, 0);
-        }
+         }
         for (i = 0; i < c->n_audios; i++) {
             struct representation *pls = c->audios[i];
 
@@ -2108,7 +2048,7 @@ static int dash_seek(AVFormatContext *s, struct representation *pls, int64_t see
     int64_t duration = 0;
 
     av_log(pls->parent, AV_LOG_VERBOSE, "DASH seek pos[%"PRId64"ms], playlist %d%s\n",
-           seek_pos_msec, pls->rep_idx, dry_run ? " (dry)" : "");
+            seek_pos_msec, pls->rep_idx, dry_run ? " (dry)" : "");
 
     // single fragment mode
     if (pls->n_fragments == 1) {