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y4mdec: Properly handle segment and time values of -1

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This commit is contained in:
Sebastian Dröge 2013-03-22 14:37:37 +01:00
parent 5981ad182e
commit 5dba06113d
1 changed files with 31 additions and 8 deletions
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39
gst/y4m/gsty4mdec.c
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@ -228,36 +228,51 @@ gst_y4m_dec_change_state (GstElement * element, GstStateChange transition)
}
static GstClockTime
gst_y4m_dec_frames_to_timestamp (GstY4mDec * y4mdec, int frame_index)
gst_y4m_dec_frames_to_timestamp (GstY4mDec * y4mdec, gint64 frame_index)
{
if (frame_index == -1)
return -1;
return gst_util_uint64_scale (frame_index, GST_SECOND * y4mdec->info.fps_d,
y4mdec->info.fps_n);
}
static int
static gint64
gst_y4m_dec_timestamp_to_frames (GstY4mDec * y4mdec, GstClockTime timestamp)
{
if (timestamp == -1)
return -1;
return gst_util_uint64_scale (timestamp, y4mdec->info.fps_n,
GST_SECOND * y4mdec->info.fps_d);
}
static int
static gint64
gst_y4m_dec_bytes_to_frames (GstY4mDec * y4mdec, gint64 bytes)
{
if (bytes == -1)
return -1;
if (bytes < y4mdec->header_size)
return 0;
return (bytes - y4mdec->header_size) / (y4mdec->info.size + 6);
}
static gint64
gst_y4m_dec_frames_to_bytes (GstY4mDec * y4mdec, int frame_index)
static guint64
gst_y4m_dec_frames_to_bytes (GstY4mDec * y4mdec, gint64 frame_index)
{
if (frame_index == -1)
return -1;
return y4mdec->header_size + (y4mdec->info.size + 6) * frame_index;
}
static GstClockTime
gst_y4m_dec_bytes_to_timestamp (GstY4mDec * y4mdec, gint64 bytes)
{
if (bytes == -1)
return -1;
return gst_y4m_dec_frames_to_timestamp (y4mdec,
gst_y4m_dec_bytes_to_frames (y4mdec, bytes));
}
@ -615,7 +630,7 @@ gst_y4m_dec_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
GstSeekFlags flags;
GstSeekType start_type, stop_type;
gint64 start, stop;
int framenum;
gint64 framenum;
guint64 byte;
gst_event_parse_seek (event, &rate, &format, &flags, &start_type,
@ -627,10 +642,18 @@ gst_y4m_dec_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
}
framenum = gst_y4m_dec_timestamp_to_frames (y4mdec, start);
GST_DEBUG ("seeking to frame %d", framenum);
GST_DEBUG ("seeking to frame %" G_GINT64_FORMAT, framenum);
if (framenum == -1) {
res = FALSE;
break;
}
byte = gst_y4m_dec_frames_to_bytes (y4mdec, framenum);
GST_DEBUG ("offset %d", (int) byte);
GST_DEBUG ("offset %" G_GUINT64_FORMAT, (guint64) byte);
if (byte == -1) {
res = FALSE;
break;
}
gst_event_unref (event);
event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,