Add AVFMT_FLAG_NOFILLIN and AVFMT_FLAG_NOPARSE.

Originally committed as revision 22745 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/avformat.h

@@ -648,6 +648,8 @@ typedef struct AVFormatContext {
 #define AVFMT_FLAG_IGNIDX       0x0002 ///< Ignore index.
 #define AVFMT_FLAG_NONBLOCK     0x0004 ///< Do not block when reading packets from input.
 #define AVFMT_FLAG_IGNDTS       0x0008 ///< Ignore DTS on frames that contain both DTS & PTS
+#define AVFMT_FLAG_NOFILLIN     0x0010 ///< Do not infer any values from other values, just return what is stored in the container
+#define AVFMT_FLAG_NOPARSE      0x0020 ///< Do not use AVParsers, you also must set AVFMT_FLAG_NOFILLIN as the fillin code works on frames and no parsing -> no frames. Also seeking to frames can not work if parsing to find frame boundaries has been disabled
 
     int loop_input;
     /** decoding: size of data to probe; encoding: unused. */

libavformat/options.c

@@ -46,6 +46,8 @@ static const AVOption options[]={
 {"fflags", NULL, OFFSET(flags), FF_OPT_TYPE_FLAGS, DEFAULT, INT_MIN, INT_MAX, D|E, "fflags"},
 {"ignidx", "ignore index", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_IGNIDX, INT_MIN, INT_MAX, D, "fflags"},
 {"genpts", "generate pts", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_GENPTS, INT_MIN, INT_MAX, D, "fflags"},
+{"nofillin", "do not fill in missing values that can be exactly calculated", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_NOFILLIN, INT_MIN, INT_MAX, D, "fflags"},
+{"noparse", "disable AVParsers, this needs nofillin too", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_NOPARSE, INT_MIN, INT_MAX, D, "fflags"},
 {"igndts", "ingore dts", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_IGNDTS, INT_MIN, INT_MAX, D, "fflags"},
 #if LIBAVFORMAT_VERSION_INT < (53<<16)
 {"track", " set the track number", OFFSET(track), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, E},

libavformat/utils.c

@@ -851,6 +851,9 @@ static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
     int num, den, presentation_delayed, delay, i;
     int64_t offset;
 
+    if (s->flags & AVFMT_FLAG_NOFILLIN)
+        return;
+
     if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
         pkt->dts= AV_NOPTS_VALUE;
 
@@ -1108,7 +1111,7 @@ static int av_read_frame_internal(AVFormatContext *s, AVPacket *pkt)
             s->cur_st = st;
             st->cur_ptr = st->cur_pkt.data;
             st->cur_len = st->cur_pkt.size;
-            if (st->need_parsing && !st->parser) {
+            if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
                 st->parser = av_parser_init(st->codec->codec_id);
                 if (!st->parser) {
                     /* no parser available: just output the raw packets */
@@ -2139,7 +2142,7 @@ int av_find_stream_info(AVFormatContext *ic)
                 st->codec->time_base= st->time_base;
         }
         //only for the split stuff
-        if (!st->parser) {
+        if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
             st->parser = av_parser_init(st->codec->codec_id);
             if(st->need_parsing == AVSTREAM_PARSE_HEADERS && st->parser){
                 st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;