avformat: Add max_probe_packets option

Allows user to set maximum number of buffered packets when
probing a codec. It was a hard-coded parameter before this commit.

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

diff --git a/doc/formats.texi b/doc/formats.texi
index d689fbadfa8a88634163e4cbb4b6d4291aa49676..fc80ce1d2b4856ba78042494e7d7e2fdb4105207 100644 (file)
--- a/doc/formats.texi
+++ b/doc/formats.texi
@@ -27,6 +27,10 @@ stream information. A higher value will enable detecting more
 information in case it is dispersed into the stream, but will increase
 latency. Must be an integer not lesser than 32. It is 5000000 by default.
 
+@item max_probe_packets @var{integer} (@emph{input})
+Set the maximum number of buffered packets when probing a codec.
+Default is 2500 packets.
+
 @item packetsize @var{integer} (@emph{output})
 Set packet size.
 

diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index 6eb329f13f5dac45a38b5df20d6584aa9eb01d9e..d4d9a3b06ef894aa78685197d497b59eb99e3512 100644 (file)
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -1951,6 +1951,13 @@ typedef struct AVFormatContext {
      * - decoding: set by user
      */
     int skip_estimate_duration_from_pts;
+
+    /**
+     * Maximum number of packets that can be probed
+     * - encoding: unused
+     * - decoding: set by user
+     */
+    int max_probe_packets;
 } AVFormatContext;
 
 #if FF_API_FORMAT_GET_SET

diff --git a/libavformat/internal.h b/libavformat/internal.h
index 67c35cc3e126332af60dfd7ab11914ae470f0c80..ec9a29907a19c77d7a135fb254c998cf78097d47 100644 (file)
--- a/libavformat/internal.h
+++ b/libavformat/internal.h
@@ -33,8 +33,6 @@
 #define PROBE_BUF_MIN 2048
 #define PROBE_BUF_MAX (1 << 20)
 
-#define MAX_PROBE_PACKETS 2500
-
 #ifdef DEBUG
 #    define hex_dump_debug(class, buf, size) av_hex_dump_log(class, AV_LOG_DEBUG, buf, size)
 #else

diff --git a/libavformat/options_table.h b/libavformat/options_table.h
index f2f077b34f9cf6accbe9299523d92cbf400c54b5..432818f80d48289c8e76082ed57f037ff0b0aea9 100644 (file)
--- a/libavformat/options_table.h
+++ b/libavformat/options_table.h
@@ -111,6 +111,7 @@ static const AVOption avformat_options[] = {
 {"protocol_blacklist", "List of protocols that are not allowed to be used", OFFSET(protocol_blacklist), AV_OPT_TYPE_STRING, { .str = NULL },  CHAR_MIN, CHAR_MAX, D },
 {"max_streams", "maximum number of streams", OFFSET(max_streams), AV_OPT_TYPE_INT, { .i64 = 1000 }, 0, INT_MAX, D },
 {"skip_estimate_duration_from_pts", "skip duration calculation in estimate_timings_from_pts", OFFSET(skip_estimate_duration_from_pts), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, D},
+{"max_probe_packets", "Maximum number of packets to probe a codec", OFFSET(max_probe_packets), AV_OPT_TYPE_INT, { .i64 = 2500 }, 0, INT_MAX, D },
 {NULL},
 };
 

diff --git a/libavformat/utils.c b/libavformat/utils.c
index cfb6d033971d3f575451e3651dfb9965633b7835..8196442dd1fbb82883bd889676c0dcc591a1c95d 100644 (file)
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -363,7 +363,7 @@ static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st,
         int i;
         av_log(s, AV_LOG_DEBUG,
                "Probe with size=%d, packets=%d detected %s with score=%d\n",
-               pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets,
+               pd->buf_size, s->max_probe_packets - st->probe_packets,
                fmt->name, score);
         for (i = 0; fmt_id_type[i].name; i++) {
             if (!strcmp(fmt->name, fmt_id_type[i].name)) {
@@ -1948,7 +1948,7 @@ void ff_read_frame_flush(AVFormatContext *s)
             /* We set the current DTS to an unspecified origin. */
             st->cur_dts = AV_NOPTS_VALUE;
 
-        st->probe_packets = MAX_PROBE_PACKETS;
+        st->probe_packets = s->max_probe_packets;
 
         for (j = 0; j < MAX_REORDER_DELAY + 1; j++)
             st->pts_buffer[j] = AV_NOPTS_VALUE;
@@ -4570,7 +4570,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
     st->start_time = AV_NOPTS_VALUE;
     st->duration   = AV_NOPTS_VALUE;
     st->first_dts     = AV_NOPTS_VALUE;
-    st->probe_packets = MAX_PROBE_PACKETS;
+    st->probe_packets = s->max_probe_packets;
     st->pts_wrap_reference = AV_NOPTS_VALUE;
     st->pts_wrap_behavior = AV_PTS_WRAP_IGNORE;
 

diff --git a/libavformat/version.h b/libavformat/version.h
index bcd0408d28c2501649a0a9c14e252abd53cfb5ad..dce5a124c76f33db3154ea2b9824ab9cf87fdc07 100644 (file)
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -32,7 +32,7 @@
 // Major bumping may affect Ticket5467, 5421, 5451(compatibility with Chromium)
 // Also please add any ticket numbers that you believe might be affected here
 #define LIBAVFORMAT_VERSION_MAJOR  58
-#define LIBAVFORMAT_VERSION_MINOR  33
+#define LIBAVFORMAT_VERSION_MINOR  34
 #define LIBAVFORMAT_VERSION_MICRO 100
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \