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faac: freshen up caps negotiation

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Perform sink and src caps negotiation during caps negotation,
and also cater for re-negotiation.
This commit is contained in:
Mark Nauwelaerts 2009-08-30 23:06:24 +02:00
parent f81b1e7a4a
commit 9a8d62a775
1 changed files with 59 additions and 47 deletions
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106
ext/faac/gstfaac.c
View file

@ -91,7 +91,9 @@ static void gst_faac_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static gboolean gst_faac_sink_event (GstPad * pad, GstEvent * event);
static gboolean gst_faac_configure_source_pad (GstFaac * faac);
static gboolean gst_faac_sink_setcaps (GstPad * pad, GstCaps * caps);
static GstFlowReturn gst_faac_push_buffers (GstFaac * faac, gboolean force);
static GstFlowReturn gst_faac_chain (GstPad * pad, GstBuffer * data);
static GstStateChangeReturn gst_faac_change_state (GstElement * element,
GstStateChange transition);
@ -294,6 +296,16 @@ gst_faac_finalize (GObject * object)
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_faac_close_encoder (GstFaac * faac)
{
if (faac->handle)
faacEncClose (faac->handle);
faac->handle = NULL;
gst_adapter_clear (faac->adapter);
faac->offset = 0;
}
static gboolean
gst_faac_sink_setcaps (GstPad * pad, GstCaps * caps)
{
@ -305,25 +317,13 @@ gst_faac_sink_setcaps (GstPad * pad, GstCaps * caps)
gboolean result = FALSE;
if (!gst_caps_is_fixed (caps))
goto done;
GST_OBJECT_LOCK (faac);
if (faac->handle) {
faacEncClose (faac->handle);
faac->handle = NULL;
}
gst_adapter_clear (faac->adapter);
faac->offset = 0;
GST_OBJECT_UNLOCK (faac);
goto refuse_caps;
if (!gst_structure_get_int (structure, "channels", &channels) ||
!gst_structure_get_int (structure, "rate", &samplerate)) {
goto done;
goto refuse_caps;
}
if (!(handle = faacEncOpen (samplerate, channels, &samples, &bytes)))
goto done;
if (gst_structure_has_name (structure, "audio/x-raw-int")) {
gst_structure_get_int (structure, "width", &width);
switch (width) {
@ -344,12 +344,26 @@ gst_faac_sink_setcaps (GstPad * pad, GstCaps * caps)
bps = 4;
}
if (!fmt) {
faacEncClose (handle);
goto done;
if (!fmt)
goto refuse_caps;
/* If the encoder is initialized, do not
reinitialize it again if not necessary */
if (faac->handle) {
if (samplerate == faac->samplerate && channels == faac->channels &&
fmt == faac->format)
return TRUE;
/* clear out pending frames */
gst_faac_push_buffers (faac, TRUE);
gst_faac_close_encoder (faac);
}
GST_OBJECT_LOCK (faac);
if (!(handle = faacEncOpen (samplerate, channels, &samples, &bytes)))
goto setup_failed;
/* ok, record and set up */
faac->format = fmt;
faac->bps = bps;
faac->handle = handle;
@ -357,13 +371,25 @@ gst_faac_sink_setcaps (GstPad * pad, GstCaps * caps)
faac->samples = samples;
faac->channels = channels;
faac->samplerate = samplerate;
GST_OBJECT_UNLOCK (faac);
result = TRUE;
/* finish up */
result = gst_faac_configure_source_pad (faac);
done:
gst_object_unref (faac);
return result;
/* ERRORS */
setup_failed:
{
GST_ELEMENT_ERROR (faac, LIBRARY, SETTINGS, (NULL), (NULL));
goto done;
}
refuse_caps:
{
GST_WARNING_OBJECT (faac, "refused caps %" GST_PTR_FORMAT, caps);
goto done;
}
}
static gboolean
@ -372,7 +398,7 @@ gst_faac_configure_source_pad (GstFaac * faac)
GstCaps *allowed_caps;
GstCaps *srccaps;
gboolean ret = FALSE;
gint n, ver, mpegversion;
gint n, ver, mpegversion = 2;
faacEncConfiguration *conf;
guint maxbitrate;
@ -381,24 +407,23 @@ gst_faac_configure_source_pad (GstFaac * faac)
allowed_caps = gst_pad_get_allowed_caps (faac->srcpad);
GST_DEBUG_OBJECT (faac, "allowed caps: %" GST_PTR_FORMAT, allowed_caps);
if (allowed_caps == NULL)
return FALSE;
if (allowed_caps) {
if (gst_caps_is_empty (allowed_caps))
goto empty_caps;
if (gst_caps_is_empty (allowed_caps))
goto empty_caps;
if (!gst_caps_is_any (allowed_caps)) {
for (n = 0; n < gst_caps_get_size (allowed_caps); n++) {
GstStructure *s = gst_caps_get_structure (allowed_caps, n);
if (!gst_caps_is_any (allowed_caps)) {
for (n = 0; n < gst_caps_get_size (allowed_caps); n++) {
GstStructure *s = gst_caps_get_structure (allowed_caps, n);
if (gst_structure_get_int (s, "mpegversion", &ver) &&
(ver == 4 || ver == 2)) {
mpegversion = ver;
break;
if (gst_structure_get_int (s, "mpegversion", &ver) &&
(ver == 4 || ver == 2)) {
mpegversion = ver;
break;
}
}
}
gst_caps_unref (allowed_caps);
}
gst_caps_unref (allowed_caps);
/* we negotiated caps update current configuration */
conf = faacEncGetCurrentConfiguration (faac->handle);
@ -635,11 +660,6 @@ gst_faac_chain (GstPad * pad, GstBuffer * inbuf)
if (!faac->handle)
goto no_handle;
if (!GST_PAD_CAPS (faac->srcpad)) {
if (!gst_faac_configure_source_pad (faac))
goto nego_failed;
}
GST_LOG_OBJECT (faac, "Got buffer time: %" GST_TIME_FORMAT " duration: %"
GST_TIME_FORMAT, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (inbuf)),
GST_TIME_ARGS (GST_BUFFER_DURATION (inbuf)));
@ -662,14 +682,6 @@ no_handle:
result = GST_FLOW_ERROR;
goto done;
}
nego_failed:
{
GST_ELEMENT_ERROR (faac, CORE, NEGOTIATION, (NULL),
("failed to negotiate MPEG/AAC format with next element"));
gst_buffer_unref (inbuf);
result = GST_FLOW_ERROR;
goto done;
}
}
static void