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audioencoder: also adjust sample count upon discont to avoid ts overflow

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Only adjusting the base_ts might lead to a negative ts and as such integer
overflow into a huge timestamp which then propagates into the granulepos
and so on.  Instead, resync to incoming buffer timestamp using both base_ts
and sample count rather than only base_ts.

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=785948
This commit is contained in:
Mark Nauwelaerts 2017-08-08 20:35:25 +02:00
parent 2d632ff367
commit 00fa39befa
1 changed files with 20 additions and 1 deletions
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21
gst-libs/gst/audio/gstaudioencoder.c
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@ -1325,7 +1325,18 @@ gst_audio_encoder_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
}
if (discont) {
/* now re-sync ts */
priv->base_ts += diff;
GstClockTime shift =
gst_util_uint64_scale (gst_adapter_available (priv->adapter),
GST_SECOND, ctx->info.rate * ctx->info.bpf);
if (G_UNLIKELY (shift > GST_BUFFER_TIMESTAMP (buffer))) {
/* ERROR */
goto wrong_time;
}
/* arrange for newly added samples to come out with the ts
* of the incoming buffer that adds these */
priv->base_ts = GST_BUFFER_TIMESTAMP (buffer) - shift;
priv->samples = 0;
gst_audio_encoder_set_base_gp (enc);
priv->discont |= discont;
}
@ -1362,6 +1373,14 @@ wrong_buffer:
ret = GST_FLOW_ERROR;
goto done;
}
wrong_time:
{
GST_ELEMENT_ERROR (enc, STREAM, ENCODE, (NULL),
("buffer going too far back in time"));
gst_buffer_unref (buffer);
ret = GST_FLOW_ERROR;
goto done;
}
}
static gboolean