Merge remote-tracking branch 'newdev/master'

* newdev/master:
  mpegts: propagate avio EOF in read_packet()
  configure: Initial support for --target-os=symbian
  Fixed-point FFT and MDCT
  Include dependencies for test programs
  ac3enc: simplify sym_quant()
  flvdec: read index stored in the 'keyframes' tag.
  mov: Add support for zero-sized stsc runs.

Merged-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 66 insertions, 0 deletions

diff --git a/libavformat/flvdec.c b/libavformat/flvdec.c
index e3449a6746..697f8edbed 100644
--- a/libavformat/flvdec.c
+++ b/libavformat/flvdec.c
@@ -31,6 +31,10 @@
 #include "avio_internal.h"
 #include "flv.h"
 
+#define KEYFRAMES_TAG            "keyframes"
+#define KEYFRAMES_TIMESTAMP_TAG  "times"
+#define KEYFRAMES_BYTEOFFSET_TAG "filepositions"
+
 typedef struct {
     int wrong_dts; ///< wrong dts due to negative cts
 } FLVContext;
@@ -125,6 +129,64 @@ static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize) {
     return length;
 }
 
+static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, AVStream *vstream, int64_t max_pos) {
+    unsigned int arraylen = 0, timeslen = 0, fileposlen = 0, i;
+    double num_val;
+    char str_val[256];
+    int64_t *times = NULL;
+    int64_t *filepositions = NULL;
+    int ret = 0;
+
+    while (avio_tell(ioc) < max_pos - 2 && amf_get_string(ioc, str_val, sizeof(str_val)) > 0) {
+        int64_t* current_array;
+
+        // Expect array object in context
+        if (avio_r8(ioc) != AMF_DATA_TYPE_ARRAY)
+            break;
+
+        arraylen = avio_rb32(ioc);
+        /*
+         * Expect only 'times' or 'filepositions' sub-arrays in other case refuse to use such metadata
+         * for indexing
+         */
+        if (!strcmp(KEYFRAMES_TIMESTAMP_TAG, str_val) && !times) {
+            if (!(times = av_mallocz(sizeof(*times) * arraylen))) {
+                ret = AVERROR(ENOMEM);
+                goto finish;
+            }
+            timeslen = arraylen;
+            current_array = times;
+        } else if (!strcmp(KEYFRAMES_BYTEOFFSET_TAG, str_val) && !filepositions) {
+            if (!(filepositions = av_mallocz(sizeof(*filepositions) * arraylen))) {
+                ret = AVERROR(ENOMEM);
+                goto finish;
+            }
+            fileposlen = arraylen;
+            current_array = filepositions;
+        } else // unexpected metatag inside keyframes, will not use such metadata for indexing
+            break;
+
+        for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
+            if (avio_r8(ioc) != AMF_DATA_TYPE_NUMBER)
+                goto finish;
+            num_val = av_int2dbl(avio_rb64(ioc));
+            current_array[i] = num_val;
+        }
+    }
+
+    if (timeslen == fileposlen)
+         for(i = 0; i < arraylen; i++)
+             av_add_index_entry(vstream, filepositions[i], times[i]*1000, 0, 0, AVINDEX_KEYFRAME);
+    else
+        av_log(s, AV_LOG_WARNING, "Invalid keyframes object, skipping.\n");
+
+finish:
+    av_freep(&times);
+    av_freep(&filepositions);
+    avio_seek(ioc, max_pos, SEEK_SET);
+    return ret;
+}
+
 static int amf_parse_object(AVFormatContext *s, AVStream *astream, AVStream *vstream, const char *key, int64_t max_pos, int depth) {
     AVCodecContext *acodec, *vcodec;
     AVIOContext *ioc;
@@ -149,6 +211,10 @@ static int amf_parse_object(AVFormatContext *s, AVStream *astream, AVStream *vst
         case AMF_DATA_TYPE_OBJECT: {
             unsigned int keylen;
 
+            if (!strcmp(KEYFRAMES_TAG, key) && depth == 1)
+                if (parse_keyframes_index(s, ioc, vstream, max_pos) < 0)
+                    return -1;
+
             while(avio_tell(ioc) < max_pos - 2 && (keylen = avio_rb16(ioc))) {
                 avio_skip(ioc, keylen); //skip key string
                 if(amf_parse_object(s, NULL, NULL, NULL, max_pos, depth + 1) < 0)