mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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370 lines
9.5 KiB
C++
370 lines
9.5 KiB
C++
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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*
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* Filter:
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* Copyright (C) 2000 Donald A. Graft
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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*/
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#include <string.h>
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#include <gst/gst.h>
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#include "gstmonkeydec.h"
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GstElementDetails gst_monkeydec_details = {
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"MonkeyAudio decoder",
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"Codec/Audio/Decoder",
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"Free to use",
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"Decode MonkeyAudio audio stream (.ape)",
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VERSION,
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"Jeremy SIMON <jsimon13@yahoo.fr>",
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"(C) 2002 Matthew T. Ashland",
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};
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/* Filter signals and args */
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enum
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{
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/* FILL ME */
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LAST_SIGNAL
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};
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enum
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{
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ARG_0
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};
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static void gst_monkeydec_class_init (GstMonkeyDecClass *klass);
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static void gst_monkeydec_init (GstMonkeyDec *monkeydec);
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static void gst_monkeydec_loop (GstElement *element);
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static gboolean
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gst_monkeydec_src_event (GstPad *pad, GstEvent *event);
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static gboolean
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gst_monkeydec_src_query (GstPad *pad, GstQueryType type,
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GstFormat *format, gint64 *value);
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static const GstQueryType*
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gst_monkeydec_get_query_types (GstPad *pad);
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static const GstFormat*
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gst_monkeydec_get_formats (GstPad *pad);
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static GstElementStateReturn
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gst_monkeydec_change_state (GstElement *element);
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static GstElementClass *parent_class = NULL;
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GType gst_monkeydec_get_type (void)
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{
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static GType monkeydec_type = 0;
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if (!monkeydec_type) {
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static const GTypeInfo monkeydec_info = {
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sizeof (GstMonkeyDecClass), NULL,
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NULL,
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(GClassInitFunc) gst_monkeydec_class_init,
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NULL,
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NULL,
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sizeof (GstMonkeyDec),
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0,
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(GInstanceInitFunc) gst_monkeydec_init,
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};
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monkeydec_type = g_type_register_static (GST_TYPE_ELEMENT, "GstMonkeyDec", &monkeydec_info, (GTypeFlags)0);
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}
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return monkeydec_type;
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}
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static void
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gst_monkeydec_class_init (GstMonkeyDecClass *klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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gstelement_class->change_state = gst_monkeydec_change_state;
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parent_class = GST_ELEMENT_CLASS( g_type_class_ref(GST_TYPE_ELEMENT));
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}
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static void
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gst_monkeydec_init (GstMonkeyDec * monkeydec)
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{
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monkeydec->sinkpad = gst_pad_new_from_template (monkeydec_sink_template, "sink");
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gst_element_add_pad (GST_ELEMENT (monkeydec), monkeydec->sinkpad);
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monkeydec->srcpad = gst_pad_new_from_template (monkeydec_src_template, "src");
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gst_element_add_pad (GST_ELEMENT (monkeydec), monkeydec->srcpad);
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gst_element_set_loop_function (GST_ELEMENT (monkeydec), gst_monkeydec_loop);
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gst_pad_set_event_function (monkeydec->srcpad, (GstPadEventFunction)(gst_monkeydec_src_event));
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gst_pad_set_query_function (monkeydec->srcpad, gst_monkeydec_src_query);
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gst_pad_set_query_type_function (monkeydec->srcpad, (GstPadQueryTypeFunction)(gst_monkeydec_get_query_types));
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gst_pad_set_formats_function (monkeydec->srcpad, (GstPadFormatsFunction)(gst_monkeydec_get_formats));
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}
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static const GstFormat*
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gst_monkeydec_get_formats (GstPad *pad)
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{
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static const GstFormat src_formats[] = {
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/* GST_FORMAT_BYTES,
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GST_FORMAT_UNITS,*/
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GST_FORMAT_TIME,
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(GstFormat)0
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};
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static const GstFormat sink_formats[] = {
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/*GST_FORMAT_BYTES,*/
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GST_FORMAT_TIME,
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(GstFormat)0
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};
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return (GST_PAD_IS_SRC (pad) ? src_formats : sink_formats);
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}
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static const GstQueryType*
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gst_monkeydec_get_query_types (GstPad *pad)
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{
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static const GstQueryType gst_monkeydec_src_query_types[] = {
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GST_QUERY_TOTAL,
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GST_QUERY_POSITION,
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(GstQueryType)0
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};
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return gst_monkeydec_src_query_types;
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}
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static gboolean
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gst_monkeydec_src_query (GstPad *pad, GstQueryType type,
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GstFormat *format, gint64 *value)
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{
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gboolean res = TRUE;
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GstMonkeyDec *monkeydec;
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monkeydec = GST_MONKEYDEC (gst_pad_get_parent (pad));
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switch (type) {
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case GST_QUERY_TOTAL:
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switch (*format) {
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case GST_FORMAT_DEFAULT:
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*format = GST_FORMAT_TIME;
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case GST_FORMAT_TIME:
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*value = monkeydec->decomp->GetInfo (APE_DECOMPRESS_LENGTH_MS) * 1000000LL;
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g_print ("Song lentgh : %lld\n", *value);
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break;
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default:
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res = FALSE;
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break;
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}
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break;
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case GST_QUERY_POSITION:
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switch (*format) {
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case GST_FORMAT_DEFAULT:
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*format = GST_FORMAT_TIME;
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default:
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*value = monkeydec->decomp->GetInfo (APE_DECOMPRESS_CURRENT_MS) * 1000000LL;
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//g_print ("Song position : %lld\n", *value);
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break;
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}
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default:
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break;
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}
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return res;
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}
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static gboolean
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gst_monkeydec_src_event (GstPad *pad, GstEvent *event)
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{
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gboolean res = TRUE;
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GstMonkeyDec *monkeydec;
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monkeydec = GST_MONKEYDEC (gst_pad_get_parent (pad));
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switch (GST_EVENT_TYPE (event)) {
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/* the all-formats seek logic */
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case GST_EVENT_SEEK:
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{
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gboolean flush;
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GstFormat format;
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format = GST_FORMAT_TIME;
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/* shave off the flush flag, we'll need it later */
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flush = GST_EVENT_SEEK_FLAGS (event) & GST_SEEK_FLAG_FLUSH;
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monkeydec->seek_to = GST_EVENT_SEEK_OFFSET (event) * monkeydec->frequency / GST_SECOND;
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g_print ("Seek to : %lld\n", monkeydec->seek_to);
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monkeydec->io->need_discont = TRUE;
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break;
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}
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default:
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res = FALSE;
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break;
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}
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gst_event_unref (event);
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return res;
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}
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static void
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gst_monkeydec_loop (GstElement *element)
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{
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GstMonkeyDec *monkeydec;
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gint blocks_retrieved;
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GstBuffer *buffer_out;
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GstFormat format;
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gint64 timestamp;
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gint retval;
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g_return_if_fail (element != NULL);
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g_return_if_fail (GST_IS_MONKEYDEC (element));
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monkeydec = GST_MONKEYDEC (element);
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if (!GST_PAD_IS_USABLE (monkeydec->srcpad))
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return;
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if (monkeydec->init)
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{
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monkeydec->io = new sinkpad_CIO;
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monkeydec->io->bs = gst_bytestream_new (monkeydec->sinkpad);
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if (monkeydec->io->bs == NULL)
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{
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gst_element_error(element, "Failed to initiliaze bytestream from sinkpad");
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return;
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}
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monkeydec->io->sinkpad = monkeydec->sinkpad;
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monkeydec->io->Open ("");
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monkeydec->decomp = CreateIAPEDecompressEx (monkeydec->io, &retval);
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if (monkeydec->decomp == NULL)
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{
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gst_element_error(element, "Failed to initiliaze MonkeyAudio decoder engine : %d", retval);
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return;
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}
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monkeydec->channels = monkeydec->decomp->GetInfo (APE_INFO_CHANNELS);
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monkeydec->frequency = monkeydec->decomp->GetInfo (APE_INFO_SAMPLE_RATE);
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monkeydec->depth = monkeydec->decomp->GetInfo (APE_INFO_BITS_PER_SAMPLE);
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monkeydec->io->eos = FALSE;
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monkeydec->total_samples = 0;
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monkeydec->io->need_discont = FALSE;
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monkeydec->seek_to = 0;
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monkeydec->init = FALSE;
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}
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buffer_out = gst_buffer_new_and_alloc (1024 * monkeydec->decomp->GetInfo(APE_INFO_BLOCK_ALIGN));
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if (monkeydec->seek_to != 0)
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{
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monkeydec->decomp->Seek (monkeydec->seek_to);
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monkeydec->seek_to = 0;
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}
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format = GST_FORMAT_TIME;
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gst_monkeydec_src_query (monkeydec->srcpad, GST_QUERY_POSITION, &format, ×tamp);
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if (monkeydec->io->need_discont)
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{
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monkeydec->io->need_discont = FALSE;
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/* if the pad is not usable, don't push it out */
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if (GST_PAD_IS_USABLE (monkeydec->srcpad))
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{
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GstEvent *discont;
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discont = gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME, timestamp, NULL);
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gst_pad_push (monkeydec->srcpad, GST_BUFFER (discont));
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}
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}
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monkeydec->decomp->GetData((char *) GST_BUFFER_DATA (buffer_out), 1024, &blocks_retrieved);
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GST_BUFFER_SIZE (buffer_out) = blocks_retrieved * monkeydec->decomp->GetInfo(APE_INFO_BLOCK_ALIGN);
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GST_BUFFER_TIMESTAMP (buffer_out) = timestamp;
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if (!GST_PAD_CAPS (monkeydec->srcpad)) {
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gst_pad_try_set_caps (monkeydec->srcpad,
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GST_CAPS_NEW (
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"monkeydec_caps",
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"audio/raw",
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"format", GST_PROPS_STRING ("int"),
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"law", GST_PROPS_INT (0),
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"endianness", GST_PROPS_INT (G_BYTE_ORDER),
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"signed", GST_PROPS_BOOLEAN (TRUE),
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"width", GST_PROPS_INT (monkeydec->depth),
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"depth", GST_PROPS_INT (monkeydec->depth),
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"rate", GST_PROPS_INT (monkeydec->frequency),
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"channels", GST_PROPS_INT (monkeydec->channels)
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));
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}
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gst_pad_push (monkeydec->srcpad, buffer_out);
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if (monkeydec->io->eos)
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{
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GstEvent *event;
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event = gst_event_new (GST_EVENT_EOS);
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gst_pad_push (monkeydec->srcpad, GST_BUFFER (event));
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gst_element_set_eos (element);
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}
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}
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static GstElementStateReturn
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gst_monkeydec_change_state (GstElement *element)
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{
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GstMonkeyDec *monkeydec;
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monkeydec = GST_MONKEYDEC (element);
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switch (GST_STATE_TRANSITION (element)) {
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case GST_STATE_NULL_TO_READY:
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break;
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case GST_STATE_READY_TO_PAUSED:
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monkeydec->init = TRUE;
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break;
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case GST_STATE_PAUSED_TO_PLAYING:
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/* do something to get out of the chain function faster */
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break;
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case GST_STATE_PLAYING_TO_PAUSED:
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break;
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case GST_STATE_PAUSED_TO_READY:
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break;
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case GST_STATE_READY_TO_NULL:
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break;
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}
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parent_class->change_state (element);
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return GST_STATE_SUCCESS;
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}
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