st->reinit_buffers = FALSE;
}
+static GstBuffer *
+reverse_buffer (GstScaletempo * st, GstBuffer * inbuf)
+{
+ GstBuffer *outbuf;
+ GstMapInfo imap, omap;
+
+ gst_buffer_map (inbuf, &imap, GST_MAP_READ);
+ outbuf = gst_buffer_new_and_alloc (imap.size);
+ gst_buffer_map (outbuf, &omap, GST_MAP_WRITE);
+
+ if (st->format == GST_AUDIO_FORMAT_F64) {
+ const gint64 *ip = (const gint64 *) imap.data;
+ gint64 *op = (gint64 *) (omap.data + omap.size - 8 * st->samples_per_frame);
+ guint i, n = imap.size / (8 * st->samples_per_frame);
+ guint j, c = st->samples_per_frame;
+
+ for (i = 0; i < n; i++) {
+ for (j = 0; j < c; j++)
+ op[j] = ip[j];
+ op -= c;
+ ip += c;
+ }
+ } else {
+ const gint32 *ip = (const gint32 *) imap.data;
+ gint32 *op = (gint32 *) (omap.data + omap.size - 4 * st->samples_per_frame);
+ guint i, n = imap.size / (4 * st->samples_per_frame);
+ guint j, c = st->samples_per_frame;
+
+ for (i = 0; i < n; i++) {
+ for (j = 0; j < c; j++)
+ op[j] = ip[j];
+ op -= c;
+ ip += c;
+ }
+ }
+
+ gst_buffer_unmap (inbuf, &imap);
+ gst_buffer_unmap (outbuf, &omap);
+
+ return outbuf;
+}
/* GstBaseTransform vmethod implementations */
static GstFlowReturn
guint offset_in, bytes_out;
GstMapInfo omap;
GstClockTime timestamp;
+ GstBuffer *tmpbuf = NULL;
+
+ if (st->reverse)
+ tmpbuf = reverse_buffer (st, inbuf);
gst_buffer_map (outbuf, &omap, GST_MAP_WRITE);
pout = (gint8 *) omap.data;
- offset_in = fill_queue (st, inbuf, 0);
+ bytes_out = omap.size;
+
+ offset_in = fill_queue (st, tmpbuf ? tmpbuf : inbuf, 0);
bytes_out = 0;
while (st->bytes_queued >= st->bytes_queue_max) {
guint bytes_off = 0;
st->bytes_to_slide = frames_to_stride_whole * st->bytes_per_frame;
st->frames_stride_error = frames_to_slide - frames_to_stride_whole;
- offset_in += fill_queue (st, inbuf, offset_in);
+ offset_in += fill_queue (st, tmpbuf ? tmpbuf : inbuf, offset_in);
}
-
gst_buffer_unmap (outbuf, &omap);
- timestamp = GST_BUFFER_TIMESTAMP (inbuf) - st->segment_start;
- if (timestamp < st->latency)
- timestamp = 0;
- else
- timestamp -= st->latency;
- GST_BUFFER_TIMESTAMP (outbuf) = timestamp / st->scale + st->segment_start;
+ if (st->reverse) {
+ timestamp = st->in_segment.stop - GST_BUFFER_TIMESTAMP (inbuf);
+ if (timestamp < st->latency)
+ timestamp = 0;
+ else
+ timestamp -= st->latency;
+ } else {
+ timestamp = GST_BUFFER_TIMESTAMP (inbuf) - st->in_segment.start;
+ if (timestamp < st->latency)
+ timestamp = 0;
+ else
+ timestamp -= st->latency;
+ }
+ GST_BUFFER_TIMESTAMP (outbuf) = timestamp / st->scale + st->in_segment.start;
GST_BUFFER_DURATION (outbuf) =
gst_util_uint64_scale (bytes_out, GST_SECOND,
st->bytes_per_frame * st->sample_rate);
gst_buffer_set_size (outbuf, bytes_out);
+ if (tmpbuf)
+ gst_buffer_unref (tmpbuf);
+
return GST_FLOW_OK;
}
+static GstFlowReturn
+gst_scaletempo_submit_input_buffer (GstBaseTransform * trans,
+ gboolean is_discont, GstBuffer * input)
+{
+ GstScaletempo *scaletempo = GST_SCALETEMPO (trans);
+
+ if (scaletempo->in_segment.format == GST_FORMAT_TIME) {
+ input =
+ gst_audio_buffer_clip (input, &scaletempo->in_segment,
+ scaletempo->sample_rate, scaletempo->bytes_per_frame);
+ if (!input)
+ return GST_FLOW_OK;
+ }
+
+ return GST_BASE_TRANSFORM_CLASS (parent_class)->submit_input_buffer (trans,
+ is_discont, input);
+}
+
static gboolean
gst_scaletempo_transform_size (GstBaseTransform * trans,
GstPadDirection direction,
static gboolean
gst_scaletempo_sink_event (GstBaseTransform * trans, GstEvent * event)
{
+ GstScaletempo *scaletempo = GST_SCALETEMPO (trans);
+
if (GST_EVENT_TYPE (event) == GST_EVENT_SEGMENT) {
- GstScaletempo *scaletempo = GST_SCALETEMPO (trans);
GstSegment segment;
gst_event_copy_segment (event, &segment);
- if (scaletempo->scale != segment.rate) {
- if (ABS (segment.rate - 1.0) < 1e-10) {
+ if (segment.format != GST_FORMAT_TIME
+ || scaletempo->scale != ABS (segment.rate)
+ || ! !scaletempo->reverse != ! !(segment.rate < 0.0)) {
+ if (segment.format != GST_FORMAT_TIME || ABS (segment.rate - 1.0) < 1e-10) {
scaletempo->scale = 1.0;
gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (scaletempo),
TRUE);
} else {
gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (scaletempo),
FALSE);
- scaletempo->scale = segment.rate;
+ scaletempo->scale = ABS (segment.rate);
+ scaletempo->reverse = segment.rate < 0.0;
scaletempo->bytes_stride_scaled =
scaletempo->bytes_stride * scaletempo->scale;
scaletempo->frames_stride_scaled =
}
}
- if (scaletempo->scale != 1.0) {
- scaletempo->segment_start = segment.start;
- segment.applied_rate = scaletempo->scale;
+ scaletempo->in_segment = segment;
+ scaletempo->out_segment = segment;
+
+ if (scaletempo->scale != 1.0 || scaletempo->reverse) {
+ guint32 seqnum;
+
+ segment.applied_rate = segment.rate;
segment.rate = 1.0;
- gst_event_unref (event);
if (segment.stop != -1) {
- segment.stop = (segment.stop - segment.start) / segment.applied_rate +
+ segment.stop =
+ (segment.stop - segment.start) / ABS (segment.applied_rate) +
segment.start;
}
+ scaletempo->out_segment = segment;
+
+ seqnum = gst_event_get_seqnum (event);
+ gst_event_unref (event);
+
event = gst_event_new_segment (&segment);
- gst_pad_push_event (GST_BASE_TRANSFORM_SRC_PAD (trans), event);
- return TRUE;
+ gst_event_set_seqnum (event, seqnum);
+
+ return gst_pad_push_event (GST_BASE_TRANSFORM_SRC_PAD (trans), event);
}
+ } else if (GST_EVENT_TYPE (event) == GST_EVENT_FLUSH_STOP) {
+ gst_segment_init (&scaletempo->in_segment, GST_FORMAT_UNDEFINED);
+ gst_segment_init (&scaletempo->out_segment, GST_FORMAT_UNDEFINED);
}
+
return GST_BASE_TRANSFORM_CLASS (parent_class)->sink_event (trans, event);
}
}
static gboolean
+gst_scaletempo_start (GstBaseTransform * trans)
+{
+ GstScaletempo *scaletempo = GST_SCALETEMPO (trans);
+
+ gst_segment_init (&scaletempo->in_segment, GST_FORMAT_UNDEFINED);
+ gst_segment_init (&scaletempo->out_segment, GST_FORMAT_UNDEFINED);
+
+ return TRUE;
+}
+
+static gboolean
gst_scaletempo_query (GstBaseTransform * trans, GstPadDirection direction,
GstQuery * query)
{
GST_DEBUG_FUNCPTR (gst_scaletempo_transform_size);
basetransform_class->transform = GST_DEBUG_FUNCPTR (gst_scaletempo_transform);
basetransform_class->query = GST_DEBUG_FUNCPTR (gst_scaletempo_query);
+ basetransform_class->start = GST_DEBUG_FUNCPTR (gst_scaletempo_start);
+ basetransform_class->submit_input_buffer =
+ GST_DEBUG_FUNCPTR (gst_scaletempo_submit_input_buffer);
}
static void
scaletempo->bytes_stride = 0;
scaletempo->bytes_queued = 0;
scaletempo->bytes_to_slide = 0;
- scaletempo->segment_start = 0;
+ gst_segment_init (&scaletempo->in_segment, GST_FORMAT_UNDEFINED);
+ gst_segment_init (&scaletempo->out_segment, GST_FORMAT_UNDEFINED);
}