[FFmpeg-devel] [PATCH 10/15] lavf: add support for loop points

[Rodger Combs]

---
 Changelog                   |  1 +
 libavformat/avformat.h      | 12 ++++++++++++
 libavformat/options_table.h |  2 ++
 libavformat/utils.c         |  2 +-
 libavformat/version.h       |  2 +-
 5 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/Changelog b/Changelog
index a5c6b82..f350a84 100644
--- a/Changelog
+++ b/Changelog
@@ -5,6 +5,7 @@ version <next>:
 - colorkey video filter
 - BFSTM/BCSTM demuxer
 - little-endian ADPCM_THP decoder
+- loop point support
 
 
 version 2.7:
diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index fb69852..9e10bed 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -1799,6 +1799,18 @@ typedef struct AVFormatContext {
      * Demuxing: Set by user.
      */
     int (*open_cb)(struct AVFormatContext *s, AVIOContext **p, const char 
*url, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options);
+
+    /**
+     * Suggested timestamps to start and end a loop at, in
+     * AV_TIME_BASE fractional seconds. AV_NOPTS_VALUE for loop_start indicates
+     * no looping. AV_NOPTS_VALUE for loop_end indicates the end of the file.
+     * loop_end before loop_start indicates ping-pong looping.
+     *
+     * - muxing: Set by user
+     * - demuxing: Set by avformat
+     */
+    int64_t loop_start;
+    int64_t loop_end;
 } AVFormatContext;
 
 int av_format_get_probe_score(const AVFormatContext *s);
diff --git a/libavformat/options_table.h b/libavformat/options_table.h
index 58670b0..8dec7e5 100644
--- a/libavformat/options_table.h
+++ b/libavformat/options_table.h
@@ -100,6 +100,8 @@ static const AVOption avformat_options[] = {
 {"dump_separator", "set information dump field separator", 
OFFSET(dump_separator), AV_OPT_TYPE_STRING, {.str = ", "}, CHAR_MIN, CHAR_MAX, 
D|E},
 {"codec_whitelist", "List of decoders that are allowed to be used", 
OFFSET(codec_whitelist), AV_OPT_TYPE_STRING, { .str = NULL },  CHAR_MIN, 
CHAR_MAX, D },
 {"format_whitelist", "List of demuxers that are allowed to be used", 
OFFSET(format_whitelist), AV_OPT_TYPE_STRING, { .str = NULL },  CHAR_MIN, 
CHAR_MAX, D },
+{"loop_start", "start time of a loop", OFFSET(loop_start), AV_OPT_TYPE_INT64, 
{.i64 = AV_NOPTS_VALUE}, INT64_MIN, INT64_MAX, E},
+{"loop_end", "start time of a loop", OFFSET(loop_end), AV_OPT_TYPE_INT64, 
{.i64 = AV_NOPTS_VALUE}, INT64_MIN, INT64_MAX, E},
 {NULL},
 };
 
diff --git a/libavformat/utils.c b/libavformat/utils.c
index caa15ab..36961f0 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -445,7 +445,7 @@ int avformat_open_input(AVFormatContext **ps, const char 
*filename,
         }
     }
 
-    s->duration = s->start_time = AV_NOPTS_VALUE;
+    s->duration = s->start_time = s->loop_start = s->loop_end = AV_NOPTS_VALUE;
     av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename));
 
     /* Allocate private data. */
diff --git a/libavformat/version.h b/libavformat/version.h
index 99b7190..ec84570 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -30,7 +30,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVFORMAT_VERSION_MAJOR 56
-#define LIBAVFORMAT_VERSION_MINOR  37
+#define LIBAVFORMAT_VERSION_MINOR  38
 #define LIBAVFORMAT_VERSION_MICRO 100
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
-- 
2.4.1

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