lavc: export the timestamps when decoding in AVFrame.pts

Currently it's exported as AVFrame.pkt_pts, which is also the only use
for that field. The reason it is done like this is that lavc used to
export various codec-specific "timing" information in AVFrame.pts, which
is not done anymore.

Since it is confusing to the callers to have a separate field which is
used only for decoder timestamps and nothing else, deprecate pkt_pts and
use just AVFrame.pts everywhere.

doc/APIchanges

@@ -13,6 +13,10 @@ libavutil:     2015-08-28
 
 API changes, most recent first:
 
+2016-xx-xx - xxxxxxx - lavc 57.24.0 - avcodec.h
+  Decoders now export the frame timestamp as AVFrame.pts. It was
+  previously exported as AVFrame.pkt_pts, which is now deprecated.
+
 2016-xx-xx - xxxxxxx - lavu 55.16.0 - hwcontext.h hwcontext_qsv.h
   Add AV_HWDEVICE_TYPE_QSV and a new installed header with QSV-specific
   hwcontext definitions.

libavcodec/libschroedingerdec.c

@@ -326,7 +326,12 @@ static int libschroedinger_decode_frame(AVCodecContext *avctx,
                framewithpts->frame->components[2].length);
 
         /* Fill frame with current buffer data from Schroedinger. */
-        avframe->pkt_pts = framewithpts->pts;
+        avframe->pts = framewithpts->pts;
+#if FF_API_PKT_PTS
+FF_DISABLE_DEPRECATION_WARNINGS
+        avframe->pkt_pts = avframe->pts;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
         avframe->linesize[0] = framewithpts->frame->components[0].stride;
         avframe->linesize[1] = framewithpts->frame->components[1].stride;
         avframe->linesize[2] = framewithpts->frame->components[2].stride;

libavcodec/mmaldec.c

@@ -631,7 +631,12 @@ static int ffmal_copy_frame(AVCodecContext *avctx,  AVFrame *frame,
                       avctx->pix_fmt, avctx->width, avctx->height);
     }
 
-    frame->pkt_pts = buffer->pts == MMAL_TIME_UNKNOWN ? AV_NOPTS_VALUE : buffer->pts;
+    frame->pts = buffer->pts == MMAL_TIME_UNKNOWN ? AV_NOPTS_VALUE : buffer->pts;
+#if FF_API_PKT_PTS
+FF_DISABLE_DEPRECATION_WARNINGS
+    frame->pkt_pts = frame->pts;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
     frame->pkt_dts = AV_NOPTS_VALUE;
 
 done:

libavcodec/qsvdec.c

@@ -352,7 +352,12 @@ static int qsv_decode(AVCodecContext *avctx, QSVContext *q,
 
         outsurf = out_frame->surface;
 
-        frame->pkt_pts = frame->pts = outsurf->Data.TimeStamp;
+#if FF_API_PKT_PTS
+FF_DISABLE_DEPRECATION_WARNINGS
+        frame->pkt_pts = outsurf->Data.TimeStamp;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+        frame->pts = outsurf->Data.TimeStamp;
 
         frame->repeat_pict =
             outsurf->Info.PicStruct & MFX_PICSTRUCT_FRAME_TRIPLING ? 4 :

libavcodec/utils.c

@@ -551,11 +551,21 @@ int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame)
 
     frame->reordered_opaque = avctx->reordered_opaque;
     if (!pkt) {
+#if FF_API_PKT_PTS
+FF_DISABLE_DEPRECATION_WARNINGS
         frame->pkt_pts = AV_NOPTS_VALUE;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+        frame->pts     = AV_NOPTS_VALUE;
         return 0;
     }
 
+#if FF_API_PKT_PTS
+FF_DISABLE_DEPRECATION_WARNINGS
     frame->pkt_pts = pkt->pts;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+    frame->pts     = pkt->pts;
 
     for (i = 0; i < FF_ARRAY_ELEMS(sd); i++) {
         int size;

libavcodec/version.h

@@ -28,7 +28,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVCODEC_VERSION_MAJOR 57
-#define LIBAVCODEC_VERSION_MINOR 23
+#define LIBAVCODEC_VERSION_MINOR 24
 #define LIBAVCODEC_VERSION_MICRO  0
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \

libavutil/frame.c

@@ -397,7 +397,11 @@ int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
     dst->palette_has_changed    = src->palette_has_changed;
     dst->sample_rate            = src->sample_rate;
     dst->opaque                 = src->opaque;
+#if FF_API_PKT_PTS
+FF_DISABLE_DEPRECATION_WARNINGS
     dst->pkt_pts                = src->pkt_pts;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
     dst->pkt_dts                = src->pkt_dts;
     dst->reordered_opaque       = src->reordered_opaque;
     dst->quality                = src->quality;

libavutil/frame.h

@@ -210,10 +210,14 @@ typedef struct AVFrame {
      */
     int64_t pts;
 
+#if FF_API_PKT_PTS
     /**
      * PTS copied from the AVPacket that was decoded to produce this frame.
+     * @deprecated use the pts field instead
      */
+    attribute_deprecated
     int64_t pkt_pts;
+#endif
 
     /**
      * DTS copied from the AVPacket that triggered returning this frame.

libavutil/version.h

@@ -102,6 +102,9 @@
 #ifndef FF_API_VAAPI
 #define FF_API_VAAPI                    (LIBAVUTIL_VERSION_MAJOR < 56)
 #endif
+#ifndef FF_API_PKT_PTS
+#define FF_API_PKT_PTS                  (LIBAVUTIL_VERSION_MAJOR < 56)
+#endif
 
 
 /**