[FFmpeg-devel] [PATCH] Deprecate AFD field and add AFD as side-data

Kieran Kunhya kierank at obe.tv
Tue Jul 29 01:14:03 CEST 2014


---
 doc/APIchanges            |    4 ++++
 libavcodec/avcodec.h      |    5 ++++-
 libavcodec/mpeg12dec.c    |   21 ++++++++++++++++++++-
 libavcodec/version.h      |    5 ++++-
 libavfilter/vf_showinfo.c |    3 +++
 libavutil/frame.h         |   12 ++++++++++++
 libavutil/version.h       |    2 +-
 7 files changed, 48 insertions(+), 4 deletions(-)

diff --git a/doc/APIchanges b/doc/APIchanges
index 9535b88..92fb8a3 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -13,6 +13,10 @@ libavutil:     2013-12-xx
 
 API changes, most recent first:
 
+2014-07-xx - xxxxxxx - lavc 55.58.0 - avcodec.h
+2014-07-xx - xxxxxxx - lavu 53.19.0 - frame.h
+  Deprecate AVCodecContext.dtg_active_format and use side-data instead
+
 2014-07-xx - xxxxxxx - lavu 53.18.0 - display.h
   Add av_display_matrix_flip() to flip the transformation matrix.
 
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index cc74aee..b48217c 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -1493,6 +1493,7 @@ typedef struct AVCodecContext {
      */
     int me_subpel_quality;
 
+#if FF_API_AFD
     /**
      * DTG active format information (additional aspect ratio
      * information only used in DVB MPEG-2 transport streams)
@@ -1500,8 +1501,9 @@ typedef struct AVCodecContext {
      *
      * - encoding: unused
      * - decoding: Set by decoder.
+     * @deprecated Deprecated in favour of AVSideData
      */
-    int dtg_active_format;
+    attribute_deprecated int dtg_active_format;
 #define FF_DTG_AFD_SAME         8
 #define FF_DTG_AFD_4_3          9
 #define FF_DTG_AFD_16_9         10
@@ -1509,6 +1511,7 @@ typedef struct AVCodecContext {
 #define FF_DTG_AFD_4_3_SP_14_9  13
 #define FF_DTG_AFD_16_9_SP_14_9 14
 #define FF_DTG_AFD_SP_4_3       15
+#endif
 
     /**
      * maximum motion estimation search range in subpel units
diff --git a/libavcodec/mpeg12dec.c b/libavcodec/mpeg12dec.c
index aa98454..cec5e33 100644
--- a/libavcodec/mpeg12dec.c
+++ b/libavcodec/mpeg12dec.c
@@ -54,6 +54,8 @@ typedef struct Mpeg1Context {
     int has_stereo3d;
     uint8_t *a53_caption;
     int a53_caption_size;
+    uint8_t afd;
+    int has_afd;
     int slice_count;
     int save_aspect_info;
     int save_width, save_height, save_progressive_seq;
@@ -1631,6 +1633,18 @@ static int mpeg_field_start(MpegEncContext *s, const uint8_t *buf, int buf_size)
             *stereo = s1->stereo3d;
             s1->has_stereo3d = 0;
         }
+
+        if (s1->has_afd) {
+            AVFrameSideData *sd = av_frame_new_side_data(
+                s->current_picture_ptr->f, AV_FRAME_DATA_AFD,
+                1);
+            if (!sd)
+                return AVERROR(ENOMEM);
+
+            sd->data = s1->afd;
+            s1->has_afd = 0;
+        }
+
         if (HAVE_THREADS && (avctx->active_thread_type & FF_THREAD_FRAME))
             ff_thread_finish_setup(avctx);
     } else { // second field
@@ -2221,6 +2235,7 @@ static void mpeg_decode_user_data(AVCodecContext *avctx,
                                   const uint8_t *p, int buf_size)
 {
     const uint8_t *buf_end = p + buf_size;
+    Mpeg1Context *s1   = avctx->priv_data;
 
     /* we parse the DTG active format information */
     if (buf_end - p >= 5 &&
@@ -2234,7 +2249,12 @@ static void mpeg_decode_user_data(AVCodecContext *avctx,
         if (flags & 0x40) {
             if (buf_end - p < 1)
                 return;
+#if FF_API_AFD
             avctx->dtg_active_format = p[0] & 0x0f;
+#else
+            s1->has_afd = 1;
+            s1->afd = p[0] & 0x0f;
+#endif
         }
     } else if (buf_end - p >= 6 &&
                p[0] == 'J' && p[1] == 'P' && p[2] == '3' && p[3] == 'D' &&
@@ -2246,7 +2266,6 @@ static void mpeg_decode_user_data(AVCodecContext *avctx,
             S3D_video_format_type == 0x04 ||
             S3D_video_format_type == 0x08 ||
             S3D_video_format_type == 0x23) {
-            Mpeg1Context *s1   = avctx->priv_data;
 
             s1->has_stereo3d = 1;
 
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 99ba631..c5b568f 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -29,7 +29,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVCODEC_VERSION_MAJOR 55
-#define LIBAVCODEC_VERSION_MINOR 56
+#define LIBAVCODEC_VERSION_MINOR 57
 #define LIBAVCODEC_VERSION_MICRO  0
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
@@ -144,5 +144,8 @@
 #ifndef FF_API_CODEC_NAME
 #define FF_API_CODEC_NAME        (LIBAVCODEC_VERSION_MAJOR < 57)
 #endif
+#ifndef FF_API_AFD
+#define FF_API_AFD               (LIBAVCODEC_VERSION_MAJOR < 57)
+#endif
 
 #endif /* AVCODEC_VERSION_H */
diff --git a/libavfilter/vf_showinfo.c b/libavfilter/vf_showinfo.c
index cf90995..23af422 100644
--- a/libavfilter/vf_showinfo.c
+++ b/libavfilter/vf_showinfo.c
@@ -122,6 +122,9 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
             av_log(ctx, AV_LOG_INFO, "displaymatrix: rotation of %.2f degrees",
                    av_display_rotation_get((int32_t *)sd->data));
             break;
+        case AV_FRAME_DATA_AFD:
+            av_log(ctx, AV_LOG_INFO, "afd: value of %u", sd->data[0]);
+            break;
         default:
             av_log(ctx, AV_LOG_WARNING, "unknown side data type %d (%d bytes)",
                    sd->type, sd->size);
diff --git a/libavutil/frame.h b/libavutil/frame.h
index b2159d3..cbc48f1 100644
--- a/libavutil/frame.h
+++ b/libavutil/frame.h
@@ -82,8 +82,20 @@ enum AVFrameSideDataType {
      * See libavutil/display.h for a detailed description of the data.
      */
     AV_FRAME_DATA_DISPLAYMATRIX,
+    /**
+     * Active Format Description data consisting of a single byte as specified in ETSI TS 101 154
+     */
+    AV_FRAME_DATA_AFD,
 };
 
+#define AV_DTG_AFD_SAME         8
+#define AV_DTG_AFD_4_3          9
+#define AV_DTG_AFD_16_9         10
+#define AV_DTG_AFD_14_9         11
+#define AV_DTG_AFD_4_3_SP_14_9  13
+#define AV_DTG_AFD_16_9_SP_14_9 14
+#define AV_DTG_AFD_SP_4_3       15
+
 typedef struct AVFrameSideData {
     enum AVFrameSideDataType type;
     uint8_t *data;
diff --git a/libavutil/version.h b/libavutil/version.h
index a2625b5..e981948 100644
--- a/libavutil/version.h
+++ b/libavutil/version.h
@@ -54,7 +54,7 @@
  */
 
 #define LIBAVUTIL_VERSION_MAJOR 53
-#define LIBAVUTIL_VERSION_MINOR 18
+#define LIBAVUTIL_VERSION_MINOR 19
 #define LIBAVUTIL_VERSION_MICRO  0
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
-- 
1.7.9.5



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