mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-11-27 20:21:24 +00:00
Code Issues 1 Projects Releases Wiki Activity

- Fix offset calculations

Browse source 
Original commit message from CVS:
- Fix offset calculations
This commit is contained in:
Wim Taymans 2003-05-29 09:12:17 +00:00
parent c694b6f725
commit 6b8b864541
1 changed files with 29 additions and 36 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

65
ext/mad/gstmad.c
View file

@ -52,8 +52,6 @@ struct _GstMad {
gboolean need_sync;
guint64 base_byte_offset;
guint64 bytes_consumed; /* since the base_byte_offset */
guint64 base_time;
guint64 framestamp; /* timestamp-like, but counted in frames */
guint64 total_samples; /* the number of samples since the sync point */
gboolean restart;
@ -315,10 +313,8 @@ gst_mad_init (GstMad *mad)
mad->tempbuffer = g_malloc (MAD_BUFFER_MDLEN * 3);
mad->tempsize = 0;
mad->need_sync = TRUE;
mad->base_time = 0;
mad->base_byte_offset = 0;
mad->bytes_consumed = 0;
mad->framestamp = 0;
mad->total_samples = 0;
mad->new_header = TRUE;
mad->framecount = 0;
@ -570,16 +566,9 @@ gst_mad_src_query (GstPad *pad, GstQueryType type,
switch (*format) {
default:
{
GstFormat time_format;
gint64 samples;
time_format = GST_FORMAT_DEFAULT;
res = gst_pad_convert (pad,
GST_FORMAT_TIME, mad->base_time,
&time_format, &samples);
/* we only know about our samples, convert to requested format */
res &= gst_pad_convert (pad,
GST_FORMAT_DEFAULT, mad->total_samples + samples,
GST_FORMAT_DEFAULT, mad->total_samples,
format, value);
break;
}
@ -656,10 +645,10 @@ normal_seek (GstMad *mad, GstPad *pad, GstEvent *event)
if (!gst_pad_convert (pad,
GST_EVENT_SEEK_FORMAT (event), GST_EVENT_SEEK_OFFSET (event),
&format, &src_offset))
{
/* didn't work, probably unsupported seek format then */
return FALSE;
}
{
/* didn't work, probably unsupported seek format then */
return FALSE;
}
/* shave off the flush flag, we'll need it later */
flush = GST_EVENT_SEEK_FLAGS (event) & GST_SEEK_FLAG_FLUSH;
@ -1030,6 +1019,8 @@ gst_mad_handle_event (GstPad *pad, GstBuffer *buffer)
gint n = GST_EVENT_DISCONT_OFFSET_LEN (event);
gint i;
mad->total_samples = 0;
for (i = 0; i < n; i++)
{
const GstFormat *formats;
@ -1051,9 +1042,14 @@ gst_mad_handle_event (GstPad *pad, GstBuffer *buffer)
time = 0;
}
/* for now, this is the best we can do. Let's hope a real timestamp
* arrives with the next buffer */
mad->base_time = time;
/* for now, this is the best we can do to get the total number
* of samples */
format = GST_FORMAT_DEFAULT;
if (!gst_pad_convert (mad->srcpad,
GST_FORMAT_TIME, time, &format, &mad->total_samples))
{
mad->total_samples = 0;
}
gst_event_unref (event);
@ -1066,7 +1062,6 @@ gst_mad_handle_event (GstPad *pad, GstBuffer *buffer)
break;
}
}
mad->total_samples = 0;
mad->tempsize = 0;
/* we don't need to restart when we get here */
mad->restart = FALSE;
@ -1118,8 +1113,8 @@ gst_mad_chain (GstPad *pad, GstBuffer *buffer)
/* if there is nothing queued (partial buffer), we prepare to set the
* timestamp on the next buffer */
if (mad->tempsize == 0) {
mad->base_time = timestamp;
mad->total_samples = 0;
GstFormat format = GST_FORMAT_DEFAULT;
gst_pad_convert (pad, GST_FORMAT_TIME, timestamp, &format, &mad->total_samples);
mad->base_byte_offset = GST_BUFFER_OFFSET (buffer);
mad->bytes_consumed = 0;
}
@ -1248,10 +1243,10 @@ gst_mad_chain (GstPad *pad, GstBuffer *buffer)
"channels", GST_PROPS_INT (nchannels),
NULL))) <= 0)
{
gst_buffer_unref (buffer);
gst_element_error (GST_ELEMENT (mad),
"could not set caps on source pad, aborting...");
return;
if (!gst_pad_recover_caps_error (mad->srcpad, NULL)) {
gst_buffer_unref (buffer);
return;
}
}
mad->channels = nchannels;
mad->rate = rate;
@ -1263,10 +1258,10 @@ gst_mad_chain (GstPad *pad, GstBuffer *buffer)
time_duration = GST_CLOCK_TIME_NONE;
}
else {
time_offset = mad->base_time + (mad->total_samples * GST_SECOND
/ mad->frame.header.samplerate);
time_duration = (mad->base_time + ((mad->total_samples + nsamples) * GST_SECOND
/ mad->frame.header.samplerate)) - time_offset;
time_offset = mad->total_samples * GST_SECOND
/ mad->frame.header.samplerate;
time_duration = ((mad->total_samples + nsamples) * GST_SECOND
/ mad->frame.header.samplerate) - time_offset;
}
if (mad->index) {
@ -1279,7 +1274,7 @@ gst_mad_chain (GstPad *pad, GstBuffer *buffer)
}
if (GST_PAD_IS_USABLE (mad->srcpad) &&
mad->segment_start <= (time_offset == GST_CLOCK_TIME_NONE ? mad->base_time : time_offset)) {
mad->segment_start <= (time_offset == GST_CLOCK_TIME_NONE ? 0 : time_offset)) {
/* for sample accurate seeking, calculate how many samples
to skip and send the remaining pcm samples */
@ -1297,7 +1292,6 @@ gst_mad_chain (GstPad *pad, GstBuffer *buffer)
GST_BUFFER_TIMESTAMP (outbuffer) = time_offset;
GST_BUFFER_DURATION (outbuffer) = time_duration;
/* FIXME this is wrong */
GST_BUFFER_OFFSET (outbuffer) = mad->total_samples;
/* output sample(s) in 16-bit signed native-endian PCM */
@ -1323,9 +1317,10 @@ gst_mad_chain (GstPad *pad, GstBuffer *buffer)
/* we have a queued timestamp on the incoming buffer that we should
* use for the next frame */
if (new_pts) {
GstFormat format = GST_FORMAT_DEFAULT;
new_pts = FALSE;
mad->base_time = timestamp;
mad->total_samples = 0;
gst_pad_convert (pad, GST_FORMAT_TIME, timestamp, &format, &mad->total_samples);
mad->base_byte_offset = GST_BUFFER_OFFSET (buffer);
mad->bytes_consumed = 0;
}
@ -1373,9 +1368,7 @@ gst_mad_change_state (GstElement *element)
mad->rate = 0;
mad->channels = 0;
mad->vbr_average = 0;
mad->base_time = 0;
mad->segment_start = 0;
mad->framestamp = 0;
mad->new_header = TRUE;
mad->framecount = 0;
mad->vbr_rate = 0;