---
libavformat/avformat.h | 1 +
libavformat/options.c | 1 +
libavformat/utils.c | 13 ++++++++-----
3 files changed, 10 insertions(+), 5 deletions(-)
diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index e0b3b3f..31300c8 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -806,6 +806,7 @@ typedef struct AVFormatContext {
#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
#define AVFMT_FLAG_CUSTOM_IO 0x0080 ///< The caller has supplied a custom
AVIOContext, don't avio_close() it.
#define AVFMT_FLAG_DISCARD_CORRUPT 0x0100 ///< Discard frames marked corrupted
+#define AVFMT_FLAG_NOBUFFER 0x0200 ///< Do not buffer frames when possible
/**
* decoding: size of data to probe; encoding: unused.
diff --git a/libavformat/options.c b/libavformat/options.c
index dcc3d60..9cf0155 100644
--- a/libavformat/options.c
+++ b/libavformat/options.c
@@ -90,6 +90,7 @@ static const AVOption options[]={
{"noparse", "disable AVParsers, this needs nofillin too", 0,
AV_OPT_TYPE_CONST, {.dbl = AVFMT_FLAG_NOPARSE }, INT_MIN, INT_MAX, D, "fflags"},
{"igndts", "ignore dts", 0, AV_OPT_TYPE_CONST, {.dbl = AVFMT_FLAG_IGNDTS },
INT_MIN, INT_MAX, D, "fflags"},
{"discardcorrupt", "discard corrupted frames", 0, AV_OPT_TYPE_CONST, {.dbl =
AVFMT_FLAG_DISCARD_CORRUPT }, INT_MIN, INT_MAX, D, "fflags"},
+{"zerolatency", "reduce the latency introduced by optional buffering", 0,
AV_OPT_TYPE_CONST, {.dbl = AVFMT_FLAG_NOBUFFER }, 0, INT_MAX, D, "fflags"},
{"analyzeduration", "how many microseconds are analyzed to estimate duration",
OFFSET(max_analyze_duration), AV_OPT_TYPE_INT, {.dbl = 5*AV_TIME_BASE }, 0,
INT_MAX, D},
{"cryptokey", "decryption key", OFFSET(key), AV_OPT_TYPE_BINARY, {.dbl = 0},
0, 0, D},
{"indexmem", "max memory used for timestamp index (per stream)",
OFFSET(max_index_size), AV_OPT_TYPE_INT, {.dbl = 1<<20 }, 0, INT_MAX, D},
diff --git a/libavformat/utils.c b/libavformat/utils.c
index f5cb5d4..d13630f 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -2346,11 +2346,14 @@ int avformat_find_stream_info(AVFormatContext *ic,
AVDictionary **options)
}
break;
}
-
- pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end);
- if ((ret = av_dup_packet(pkt)) < 0)
- goto find_stream_info_err;
-
+ if (ic->flags & AVFMT_FLAG_NOBUFFER) {
+ pkt = &pkt1;
+ } else {
+ pkt = add_to_pktbuf(&ic->packet_buffer, &pkt1,
+ &ic->packet_buffer_end);
+ if ((ret = av_dup_packet(pkt)) < 0)
+ goto find_stream_info_err;
+ }
read_size += pkt->size;
st = ic->streams[pkt->stream_index];
--
1.7.8.rc1
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