avformat: Remove use of AVFrac and AVStream->pts

Move field to internal part of AVStream and struct to internal.h

Reviewed-by: Andreas Cadhalpun <andreas.cadhalpun@googlemail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavformat/avformat.h

@@ -1170,6 +1170,8 @@ typedef struct AVStream {
      * - decoding: Set by libavformat to calculate sample_aspect_ratio internally
      */
     AVRational display_aspect_ratio;
+
+    struct FFFrac *priv_pts;
 } AVStream;
 
 AVRational av_stream_get_r_frame_rate(const AVStream *s);

libavformat/internal.h

@@ -49,6 +49,18 @@ typedef struct CodecMime{
     enum AVCodecID id;
 } CodecMime;
 
+/*************************************************/
+/* fractional numbers for exact pts handling */
+
+/**
+ * The exact value of the fractional number is: 'val + num / den'.
+ * num is assumed to be 0 <= num < den.
+ */
+typedef struct FFFrac {
+    int64_t val, num, den;
+} FFFrac;
+
+
 struct AVFormatInternal {
     /**
      * Number of streams relevant for interleaving.

libavformat/mux.c

@@ -61,7 +61,7 @@
  * @param num must be >= 0
  * @param den must be >= 1
  */
-static void frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
+static void frac_init(FFFrac *f, int64_t val, int64_t num, int64_t den)
 {
     num += (den >> 1);
     if (num >= den) {
@@ -79,7 +79,7 @@ static void frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
  * @param f fractional number
  * @param incr increment, can be positive or negative
  */
-static void frac_add(AVFrac *f, int64_t incr)
+static void frac_add(FFFrac *f, int64_t incr)
 {
     int64_t num, den;
 
@@ -414,11 +414,17 @@ static int init_pts(AVFormatContext *s)
         default:
             break;
         }
+
+        if (!st->priv_pts)
+            st->priv_pts = av_mallocz(sizeof(*st->priv_pts));
+        if (!st->priv_pts)
+            return AVERROR(ENOMEM);
+
         if (den != AV_NOPTS_VALUE) {
             if (den <= 0)
                 return AVERROR_INVALIDDATA;
 
-            frac_init(&st->pts, 0, 0, den);
+            frac_init(st->priv_pts, 0, 0, den);
         }
     }
 
@@ -502,7 +508,7 @@ static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt)
         }
         pkt->dts =
 //        pkt->pts= st->cur_dts;
-            pkt->pts = st->pts.val;
+            pkt->pts = st->priv_pts->val;
     }
 
     //calculate dts from pts
@@ -538,7 +544,7 @@ static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt)
             av_ts2str(pkt->pts), av_ts2str(pkt->dts));
 
     st->cur_dts = pkt->dts;
-    st->pts.val = pkt->dts;
+    st->priv_pts->val = pkt->dts;
 
     /* update pts */
     switch (st->codec->codec_type) {
@@ -550,12 +556,12 @@ static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt)
         /* HACK/FIXME, we skip the initial 0 size packets as they are most
          * likely equal to the encoder delay, but it would be better if we
          * had the real timestamps from the encoder */
-        if (frame_size >= 0 && (pkt->size || st->pts.num != st->pts.den >> 1 || st->pts.val)) {
+        if (frame_size >= 0 && (pkt->size || st->priv_pts->num != st->priv_pts->den >> 1 || st->priv_pts->val)) {
-            frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
+            frac_add(st->priv_pts, (int64_t)st->time_base.den * frame_size);
         }
         break;
     case AVMEDIA_TYPE_VIDEO:
-        frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
+        frac_add(st->priv_pts, (int64_t)st->time_base.den * st->codec->time_base.num);
         break;
     }
     return 0;

libavformat/utils.c

@@ -116,7 +116,10 @@ MAKE_ACCESSORS(AVFormatContext, format, AVOpenCallback, open_cb)
 
 int64_t av_stream_get_end_pts(const AVStream *st)
 {
-    return st->pts.val;
+    if (st->priv_pts) {
+        return st->priv_pts->val;
+    } else
+        return AV_NOPTS_VALUE;
 }
 
 struct AVCodecParserContext *av_stream_get_parser(const AVStream *st)
@@ -3668,6 +3671,7 @@ void ff_free_stream(AVFormatContext *s, AVStream *st) {
         av_freep(&st->info->duration_error);
     av_freep(&st->info);
     av_freep(&st->recommended_encoder_configuration);
+    av_freep(&st->priv_pts);
     av_freep(&s->streams[ --s->nb_streams ]);
 }