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ext/celt/gstceltdec.c: Correctly take the granulepos from upstream if possible and correctly handle the granulepos in...

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Original commit message from CVS:
* ext/celt/gstceltdec.c: (celt_dec_chain_parse_data):
Correctly take the granulepos from upstream if possible and
correctly handle the granulepos in various calculations: the
granulepos is the sample number of the _last_ sample in a frame, not
the first.
* ext/celt/gstceltenc.c: (gst_celt_enc_sinkevent),
(gst_celt_enc_encode), (gst_celt_enc_chain),
(gst_celt_enc_change_state):
* ext/celt/gstceltenc.h:
Handle non-zero start timestamps in the encoder and detect/handle
stream discontinuities. Fixes bug #547075.
This commit is contained in:
Sebastian Dröge 2008-08-31 15:01:32 +00:00
parent 315cb1ab96
commit 16e70c80ae
4 changed files with 186 additions and 66 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

15
ChangeLog
View file

@ -1,3 +1,18 @@
2008-08-31 Sebastian Dröge <sebastian.droege@collabora.co.uk>
* ext/celt/gstceltdec.c: (celt_dec_chain_parse_data):
Correctly take the granulepos from upstream if possible and
correctly handle the granulepos in various calculations: the
granulepos is the sample number of the _last_ sample in a frame, not
the first.
* ext/celt/gstceltenc.c: (gst_celt_enc_sinkevent),
(gst_celt_enc_encode), (gst_celt_enc_chain),
(gst_celt_enc_change_state):
* ext/celt/gstceltenc.h:
Handle non-zero start timestamps in the encoder and detect/handle
stream discontinuities. Fixes bug #547075.
2008-08-31 Sebastian Dröge <sebastian.droege@collabora.co.uk>
Patch by: Rov Juvano <rovjuvano at users dot sourceforge dot net>

20
ext/celt/gstceltdec.c
View file

@ -618,6 +618,13 @@ celt_dec_chain_parse_data (GstCeltDec * dec, GstBuffer * buf,
size = GST_BUFFER_SIZE (buf);
GST_DEBUG_OBJECT (dec, "received buffer of size %u", size);
if (!GST_BUFFER_TIMESTAMP_IS_VALID (buf)
&& GST_BUFFER_OFFSET_END_IS_VALID (buf)) {
dec->granulepos = GST_BUFFER_OFFSET_END (buf);
GST_DEBUG_OBJECT (dec,
"Taking granulepos from upstream: %" G_GUINT64_FORMAT,
dec->granulepos);
}
/* copy timestamp */
} else {
@ -649,18 +656,19 @@ celt_dec_chain_parse_data (GstCeltDec * dec, GstBuffer * buf,
if (dec->granulepos == -1) {
if (dec->segment.format != GST_FORMAT_TIME) {
GST_WARNING_OBJECT (dec, "segment not initialized or not TIME format");
dec->granulepos = 0;
dec->granulepos = dec->frame_size;
} else {
dec->granulepos = gst_util_uint64_scale_int (dec->segment.last_stop,
dec->header.sample_rate, GST_SECOND);
dec->header.sample_rate, GST_SECOND) + dec->frame_size;
}
GST_DEBUG_OBJECT (dec, "granulepos=%" G_GINT64_FORMAT, dec->granulepos);
}
GST_BUFFER_OFFSET (outbuf) = dec->granulepos;
GST_BUFFER_OFFSET_END (outbuf) = dec->granulepos + dec->frame_size;
GST_BUFFER_TIMESTAMP (outbuf) = gst_util_uint64_scale_int (dec->granulepos,
GST_SECOND, dec->header.sample_rate);
GST_BUFFER_OFFSET (outbuf) = dec->granulepos - dec->frame_size;
GST_BUFFER_OFFSET_END (outbuf) = dec->granulepos;
GST_BUFFER_TIMESTAMP (outbuf) =
gst_util_uint64_scale_int (dec->granulepos - dec->frame_size, GST_SECOND,
dec->header.sample_rate);
GST_BUFFER_DURATION (outbuf) = dec->frame_duration;
dec->granulepos += dec->frame_size;

206
ext/celt/gstceltenc.c
View file

@ -48,6 +48,7 @@
#include <gst/gsttagsetter.h>
#include <gst/tag/tag.h>
#include <gst/audio/audio.h>
#include "gstceltenc.h"
GST_DEBUG_CATEGORY_STATIC (celtenc_debug);
@ -99,6 +100,8 @@ static void gst_celt_enc_set_property (GObject * object, guint prop_id,
static GstStateChangeReturn gst_celt_enc_change_state (GstElement * element,
GstStateChange transition);
static GstFlowReturn gst_celt_enc_encode (GstCeltEnc * enc, gboolean flush);
static void
gst_celt_enc_setup_interfaces (GType celtenc_type)
{
@ -676,7 +679,7 @@ gst_celt_enc_sinkevent (GstPad * pad, GstEvent * event)
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_EOS:
enc->eos = TRUE;
gst_celt_enc_encode (enc, TRUE);
res = gst_pad_event_default (pad, event);
break;
case GST_EVENT_TAG:
@ -701,6 +704,79 @@ gst_celt_enc_sinkevent (GstPad * pad, GstEvent * event)
return res;
}
static GstFlowReturn
gst_celt_enc_encode (GstCeltEnc * enc, gboolean flush)
{
GstFlowReturn ret = GST_FLOW_OK;
gint frame_size = enc->frame_size;
gint bytes = frame_size * 2 * enc->channels;
gint bytes_per_packet =
(enc->bitrate * 1000 * enc->frame_size / enc->rate + 4) / 8;
if (flush && gst_adapter_available (enc->adapter) % bytes != 0) {
guint diff = gst_adapter_available (enc->adapter) % bytes;
GstBuffer *buf = gst_buffer_new_and_alloc (diff);
memset (GST_BUFFER_DATA (buf), 0, diff);
gst_adapter_push (enc->adapter, buf);
}
while (gst_adapter_available (enc->adapter) >= bytes) {
gint16 *data;
gint outsize;
GstBuffer *outbuf;
ret = gst_pad_alloc_buffer_and_set_caps (enc->srcpad,
GST_BUFFER_OFFSET_NONE, bytes_per_packet, GST_PAD_CAPS (enc->srcpad),
&outbuf);
if (GST_FLOW_OK != ret)
goto done;
data = (gint16 *) gst_adapter_take (enc->adapter, bytes);
enc->samples_in += frame_size;
GST_DEBUG_OBJECT (enc, "encoding %d samples (%d bytes)", frame_size, bytes);
outsize =
celt_encode (enc->state, data, GST_BUFFER_DATA (outbuf),
bytes_per_packet);
g_free (data);
if (outsize < 0) {
GST_ERROR_OBJECT (enc, "Encoding failed: %d", outsize);
ret = GST_FLOW_ERROR;
goto done;
}
GST_BUFFER_TIMESTAMP (outbuf) = enc->start_ts +
gst_util_uint64_scale_int (enc->frameno_out * frame_size, GST_SECOND,
enc->rate);
GST_BUFFER_DURATION (outbuf) =
gst_util_uint64_scale_int (frame_size, GST_SECOND, enc->rate);
/* set gp time and granulepos; see gst-plugins-base/ext/ogg/README */
GST_BUFFER_OFFSET_END (outbuf) = enc->granulepos_offset +
((enc->frameno + 1) * frame_size);
GST_BUFFER_OFFSET (outbuf) =
gst_util_uint64_scale_int (GST_BUFFER_OFFSET_END (outbuf), GST_SECOND,
enc->rate);
enc->frameno++;
enc->frameno_out++;
ret = gst_celt_enc_push_buffer (enc, outbuf);
if ((GST_FLOW_OK != ret) && (GST_FLOW_NOT_LINKED != ret))
goto done;
}
done:
return ret;
}
static GstFlowReturn
gst_celt_enc_chain (GstPad * pad, GstBuffer * buf)
@ -763,68 +839,80 @@ gst_celt_enc_chain (GstPad * pad, GstBuffer * buf)
enc->header_sent = TRUE;
}
{
gint frame_size = enc->frame_size;
gint bytes = frame_size * 2 * enc->channels;
gint bytes_per_packet =
(enc->bitrate * 1000 * enc->frame_size / enc->rate + 4) / 8;
GST_DEBUG_OBJECT (enc, "received buffer of %u bytes", GST_BUFFER_SIZE (buf));
GST_DEBUG_OBJECT (enc, "received buffer of %u bytes",
GST_BUFFER_SIZE (buf));
/* Save the timestamp of the first buffer. This will be later
* used as offset for all following buffers */
if (enc->start_ts == GST_CLOCK_TIME_NONE) {
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
enc->start_ts = GST_BUFFER_TIMESTAMP (buf);
enc->granulepos_offset = gst_util_uint64_scale
(GST_BUFFER_TIMESTAMP (buf), enc->rate, GST_SECOND);
} else {
enc->start_ts = 0;
enc->granulepos_offset = 0;
}
}
/* Check if we have a continous stream, if not drop some samples or the buffer or
* insert some silence samples */
if (enc->next_ts != GST_CLOCK_TIME_NONE &&
GST_BUFFER_TIMESTAMP (buf) < enc->next_ts) {
guint64 diff = enc->next_ts - GST_BUFFER_TIMESTAMP (buf);
guint64 diff_bytes;
GST_WARNING_OBJECT (enc, "Buffer is older than previous "
"timestamp + duration (%" GST_TIME_FORMAT "< %" GST_TIME_FORMAT
"), cannot handle. Clipping buffer.",
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
GST_TIME_ARGS (enc->next_ts));
diff_bytes = GST_CLOCK_TIME_TO_FRAMES (diff, enc->rate) * enc->channels * 2;
if (diff_bytes >= GST_BUFFER_SIZE (buf)) {
gst_buffer_unref (buf);
return GST_FLOW_OK;
}
buf = gst_buffer_make_metadata_writable (buf);
GST_BUFFER_DATA (buf) += diff_bytes;
GST_BUFFER_SIZE (buf) -= diff_bytes;
GST_BUFFER_TIMESTAMP (buf) += diff;
if (GST_BUFFER_DURATION_IS_VALID (buf))
GST_BUFFER_DURATION (buf) -= diff;
}
if (enc->next_ts != GST_CLOCK_TIME_NONE
&& GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
guint64 max_diff =
gst_util_uint64_scale (enc->frame_size, GST_SECOND, enc->rate);
if (GST_BUFFER_TIMESTAMP (buf) != enc->next_ts &&
GST_BUFFER_TIMESTAMP (buf) - enc->next_ts > max_diff) {
GST_WARNING_OBJECT (enc,
"Discontinuity detected: %" G_GUINT64_FORMAT " > %" G_GUINT64_FORMAT,
GST_BUFFER_TIMESTAMP (buf) - enc->next_ts, max_diff);
gst_celt_enc_encode (enc, TRUE);
enc->frameno_out = 0;
enc->start_ts = GST_BUFFER_TIMESTAMP (buf);
enc->granulepos_offset = gst_util_uint64_scale
(GST_BUFFER_TIMESTAMP (buf), enc->rate, GST_SECOND);
}
}
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)
&& GST_BUFFER_DURATION_IS_VALID (buf))
enc->next_ts = GST_BUFFER_TIMESTAMP (buf) + GST_BUFFER_DURATION (buf);
else
enc->next_ts = GST_CLOCK_TIME_NONE;
/* push buffer to adapter */
gst_adapter_push (enc->adapter, buf);
buf = NULL;
while (gst_adapter_available (enc->adapter) >= bytes) {
gint16 *data;
gint outsize;
GstBuffer *outbuf;
ret = gst_pad_alloc_buffer_and_set_caps (enc->srcpad,
GST_BUFFER_OFFSET_NONE, bytes_per_packet, GST_PAD_CAPS (enc->srcpad),
&outbuf);
if (GST_FLOW_OK != ret)
goto done;
data = (gint16 *) gst_adapter_take (enc->adapter, bytes);
enc->samples_in += frame_size;
GST_DEBUG_OBJECT (enc, "encoding %d samples (%d bytes)", frame_size,
bytes);
outsize =
celt_encode (enc->state, data, GST_BUFFER_DATA (outbuf),
bytes_per_packet);
g_free (data);
if (outsize < 0) {
GST_ERROR_OBJECT (enc, "Encoding failed: %d", outsize);
ret = GST_FLOW_ERROR;
goto done;
}
enc->frameno++;
GST_BUFFER_TIMESTAMP (outbuf) =
gst_util_uint64_scale_int (enc->frameno * frame_size, GST_SECOND,
enc->rate);
GST_BUFFER_DURATION (outbuf) =
gst_util_uint64_scale_int (frame_size, GST_SECOND, enc->rate);
/* set gp time and granulepos; see gst-plugins-base/ext/ogg/README */
GST_BUFFER_OFFSET_END (outbuf) = ((enc->frameno + 1) * frame_size);
GST_BUFFER_OFFSET (outbuf) =
gst_util_uint64_scale_int (GST_BUFFER_OFFSET_END (outbuf), GST_SECOND,
enc->rate);
ret = gst_celt_enc_push_buffer (enc, outbuf);
if ((GST_FLOW_OK != ret) && (GST_FLOW_NOT_LINKED != ret))
goto done;
}
}
ret = gst_celt_enc_encode (enc, FALSE);
done:
@ -900,6 +988,10 @@ gst_celt_enc_change_state (GstElement * element, GstStateChange transition)
case GST_STATE_CHANGE_READY_TO_PAUSED:
enc->frameno = 0;
enc->samples_in = 0;
enc->frameno_out = 0;
enc->start_ts = GST_CLOCK_TIME_NONE;
enc->next_ts = GST_CLOCK_TIME_NONE;
enc->granulepos_offset = 0;
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
/* fall through */

5
ext/celt/gstceltenc.h
View file

@ -76,6 +76,11 @@ struct _GstCeltEnc {
GstTagList *tags;
guint64 frameno;
guint64 frameno_out;
GstClockTime start_ts;
GstClockTime next_ts;
guint64 granulepos_offset;
};
struct _GstCeltEncClass {