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dcaparse: add support for "audio/x-private1-dts"

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This commit is contained in:
Andoni Morales Alastruey 2013-05-02 15:00:22 +02:00
parent 4531381541
commit 3462282b83
2 changed files with 52 additions and 8 deletions
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44
gst/audioparsers/gstdcaparse.c
View file

@ -68,7 +68,7 @@ static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-dts"));
GST_STATIC_CAPS ("audio/x-dts; " "audio/x-private1-dts"));
static void gst_dca_parse_finalize (GObject * object);
@ -78,6 +78,8 @@ static GstFlowReturn gst_dca_parse_handle_frame (GstBaseParse * parse,
GstBaseParseFrame * frame, gint * skipsize);
static GstCaps *gst_dca_parse_get_sink_caps (GstBaseParse * parse,
GstCaps * filter);
static gboolean gst_dca_parse_set_sink_caps (GstBaseParse * parse,
GstCaps * caps);
#define gst_dca_parse_parent_class parent_class
G_DEFINE_TYPE (GstDcaParse, gst_dca_parse, GST_TYPE_BASE_PARSE);
@ -98,6 +100,7 @@ gst_dca_parse_class_init (GstDcaParseClass * klass)
parse_class->stop = GST_DEBUG_FUNCPTR (gst_dca_parse_stop);
parse_class->handle_frame = GST_DEBUG_FUNCPTR (gst_dca_parse_handle_frame);
parse_class->get_sink_caps = GST_DEBUG_FUNCPTR (gst_dca_parse_get_sink_caps);
parse_class->set_sink_caps = GST_DEBUG_FUNCPTR (gst_dca_parse_set_sink_caps);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
@ -127,6 +130,8 @@ gst_dca_parse_init (GstDcaParse * dcaparse)
gst_base_parse_set_min_frame_size (GST_BASE_PARSE (dcaparse),
DCA_MIN_FRAMESIZE);
gst_dca_parse_reset (dcaparse);
dcaparse->baseparse_chainfunc =
GST_BASE_PARSE_SINK_PAD (GST_BASE_PARSE (dcaparse))->chainfunc;
}
static void
@ -440,6 +445,28 @@ cleanup:
return ret;
}
/*
* MPEG-PS private1 streams add a 2 bytes "Audio Substream Headers" for each
* buffer (not each frame) with the offset of the next frame's start.
* These 2 bytes can be dropped safely as they do not include any timing
* information, only the offset to the start of the next frame.
* See gstac3parse.c for a more detailed description.
* */
static GstFlowReturn
gst_dca_parse_chain_priv (GstPad * pad, GstObject *parent, GstBuffer * buffer)
{
GstBuffer *newbuf;
GstFlowReturn ret;
GstDcaParse *dcaparse = GST_DCA_PARSE (parent);
newbuf = gst_buffer_copy_region (buffer, GST_BUFFER_COPY_ALL,
2, gst_buffer_get_size (buffer) - 2);
ret = dcaparse->baseparse_chainfunc (pad, parent, newbuf);
gst_buffer_unref (buffer);
return ret;
}
static GstCaps *
gst_dca_parse_get_sink_caps (GstBaseParse * parse, GstCaps * filter)
{
@ -485,3 +512,18 @@ gst_dca_parse_get_sink_caps (GstBaseParse * parse, GstCaps * filter)
return res;
}
static gboolean
gst_dca_parse_set_sink_caps (GstBaseParse * parse, GstCaps * caps)
{
GstStructure *s;
GstDcaParse *dcaparse = GST_DCA_PARSE (parse);
s = gst_caps_get_structure (caps, 0);
if (gst_structure_has_name (s, "audio/x-private1-dts")) {
gst_pad_set_chain_function (parse->sinkpad, gst_dca_parse_chain_priv);
} else {
gst_pad_set_chain_function (parse->sinkpad, dcaparse->baseparse_chainfunc);
}
return TRUE;
}

16
gst/audioparsers/gstdcaparse.h
View file

@ -51,14 +51,16 @@ struct _GstDcaParse {
GstBaseParse baseparse;
/*< private >*/
gint rate;
gint channels;
gint depth;
gint endianness;
gint block_size;
gint frame_size;
gint rate;
gint channels;
gint depth;
gint endianness;
gint block_size;
gint frame_size;
guint32 last_sync;
guint32 last_sync;
GstPadChainFunction baseparse_chainfunc;
};
/**