diff options
Diffstat (limited to 'gst/wavparse/gstwavparse.c')
| -rw-r--r-- | gst/wavparse/gstwavparse.c | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/gst/wavparse/gstwavparse.c b/gst/wavparse/gstwavparse.c index 1cef0e44..cea8a66d 100644 --- a/gst/wavparse/gstwavparse.c +++ b/gst/wavparse/gstwavparse.c @@ -270,6 +270,23 @@ gst_wavparse_create_sourcepad (GstWavParse * wavparse) GST_DEBUG_OBJECT (wavparse, "srcpad created"); } +/* Compute (value * nom) % denom, avoiding overflow. This can be used + * to perform ceiling or rounding division together with + * gst_util_uint64_scale[_int]. */ +#define uint64_scale_modulo(val, nom, denom) \ + ((val % denom) * (nom % denom) % denom) + +/* Like gst_util_uint64_scale_int, but performs ceiling division. */ +static guint64 +uint64_ceiling_scale_int (guint64 val, gint num, gint denom) +{ + guint64 result = gst_util_uint64_scale_int (val, num, denom); + + if (uint64_scale_modulo (val, num, denom) == 0) + return result; + else + return result + 1; +} #if 0 static void @@ -833,7 +850,7 @@ gst_wavparse_perform_seek (GstWavParse * wav, GstEvent * event) * bytes. */ if (wav->bps) wav->offset = - gst_util_uint64_scale_int (seeksegment.last_stop, wav->bps, + uint64_ceiling_scale_int (seeksegment.last_stop, wav->bps, GST_SECOND); else wav->offset = seeksegment.last_stop; @@ -849,7 +866,7 @@ gst_wavparse_perform_seek (GstWavParse * wav, GstEvent * event) if (stop_type != GST_SEEK_TYPE_NONE) { if (wav->bps) - wav->end_offset = gst_util_uint64_scale_int (stop, wav->bps, GST_SECOND); + wav->end_offset = uint64_ceiling_scale_int (stop, wav->bps, GST_SECOND); else wav->end_offset = stop; GST_LOG_OBJECT (wav, "end_offset=%" G_GUINT64_FORMAT, wav->end_offset); @@ -1263,7 +1280,7 @@ gst_wavparse_stream_headers (GstWavParse * wav) } if (wav->bps > 0) { - duration = gst_util_uint64_scale_int (wav->datasize, GST_SECOND, wav->bps); + duration = uint64_ceiling_scale_int (wav->datasize, wav->bps, GST_SECOND); GST_DEBUG_OBJECT (wav, "Got duration %" GST_TIME_FORMAT, GST_TIME_ARGS (duration)); gst_segment_init (&wav->segment, GST_FORMAT_TIME); @@ -1514,8 +1531,8 @@ iterate_adapter: if (wav->bps > 0) { /* and timestamps if we have a bitrate, be carefull for overflows */ - timestamp = gst_util_uint64_scale_int (pos, GST_SECOND, wav->bps); - next_timestamp = gst_util_uint64_scale_int (nextpos, GST_SECOND, wav->bps); + timestamp = uint64_ceiling_scale_int (pos, wav->bps, GST_SECOND); + next_timestamp = uint64_ceiling_scale_int (nextpos, wav->bps, GST_SECOND); duration = next_timestamp - timestamp; /* update current running segment position */ |