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620 lines
19 KiB
C
620 lines
19 KiB
C
/* ASF parser plugin for GStreamer
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* Copyright (C) 2009 Thiago Santos <thiagoss@embedded.ufcg.edu.br>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include "gstasfparse.h"
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/* FIXME add this include
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* #include <gst/gst-i18n-plugin.h> */
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GST_DEBUG_CATEGORY_STATIC (asfparse_debug);
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#define GST_CAT_DEFAULT asfparse_debug
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static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-ms-asf, parsed = (boolean) true")
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);
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static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-ms-asf, parsed = (boolean) false")
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);
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static GstStateChangeReturn gst_asf_parse_change_state (GstElement * element,
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GstStateChange transition);
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static void gst_asf_parse_loop (GstPad * pad);
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#define gst_asf_parse_parent_class parent_class
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G_DEFINE_TYPE (GstAsfParse, gst_asf_parse, GST_TYPE_ELEMENT);
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static void
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gst_asf_parse_reset (GstAsfParse * asfparse)
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{
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gst_adapter_clear (asfparse->adapter);
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gst_asf_file_info_reset (asfparse->asfinfo);
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asfparse->parse_state = ASF_PARSING_HEADERS;
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asfparse->headers_size = 0;
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asfparse->data_size = 0;
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asfparse->parsed_packets = 0;
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asfparse->offset = 0;
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}
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static gboolean
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gst_asf_parse_sink_activate (GstPad * sinkpad, GstObject * parent)
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{
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GstQuery *query;
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gboolean pull_mode;
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query = gst_query_new_scheduling ();
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if (!gst_pad_peer_query (sinkpad, query)) {
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gst_query_unref (query);
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goto activate_push;
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}
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pull_mode = gst_query_has_scheduling_mode (query, GST_PAD_MODE_PULL);
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gst_query_unref (query);
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if (!pull_mode)
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goto activate_push;
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GST_DEBUG_OBJECT (sinkpad, "activating pull");
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return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE);
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activate_push:
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{
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GST_DEBUG_OBJECT (sinkpad, "activating push");
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return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
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}
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}
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static gboolean
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gst_asf_parse_sink_activate_mode (GstPad * pad, GstObject * parent,
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GstPadMode mode, gboolean active)
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{
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gboolean res;
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switch (mode) {
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case GST_PAD_MODE_PULL:
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if (active) {
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res =
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gst_pad_start_task (pad, (GstTaskFunction) gst_asf_parse_loop, pad,
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NULL);
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} else {
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res = gst_pad_stop_task (pad);
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}
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case GST_PAD_MODE_PUSH:
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res = TRUE;
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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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return res;
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}
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static GstFlowReturn
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gst_asf_parse_push (GstAsfParse * asfparse, GstBuffer * buf)
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{
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return gst_pad_push (asfparse->srcpad, buf);
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}
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static GstFlowReturn
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gst_asf_parse_parse_data_object (GstAsfParse * asfparse, GstBuffer * buffer)
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{
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GstByteReader *reader;
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GstFlowReturn ret = GST_FLOW_OK;
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guint64 packet_count = 0;
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GstMapInfo map;
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GST_DEBUG_OBJECT (asfparse, "Parsing data object");
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gst_buffer_map (buffer, &map, GST_MAP_READ);
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reader = gst_byte_reader_new (map.data, map.size);
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/* skip to packet count */
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if (!gst_byte_reader_skip (reader, 40))
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goto error;
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if (!gst_byte_reader_get_uint64_le (reader, &packet_count))
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goto error;
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if (asfparse->asfinfo->packets_count != packet_count) {
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GST_WARNING_OBJECT (asfparse, "File properties object and data object have "
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"different packets count, %" G_GUINT64_FORMAT " %" G_GUINT64_FORMAT,
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asfparse->asfinfo->packets_count, packet_count);
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} else {
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GST_DEBUG_OBJECT (asfparse, "Total packets: %" G_GUINT64_FORMAT,
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packet_count);
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}
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gst_buffer_unmap (buffer, &map);
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gst_byte_reader_free (reader);
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return gst_asf_parse_push (asfparse, buffer);
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error:
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ret = GST_FLOW_ERROR;
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GST_ERROR_OBJECT (asfparse, "Error while parsing data object headers");
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gst_buffer_unmap (buffer, &map);
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gst_byte_reader_free (reader);
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return ret;
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}
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static GstFlowReturn
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gst_asf_parse_parse_packet (GstAsfParse * asfparse, GstBuffer * buffer)
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{
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GstAsfPacketInfo *packetinfo = asfparse->packetinfo;
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if (!gst_asf_parse_packet (buffer, packetinfo, FALSE,
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asfparse->asfinfo->packet_size))
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goto error;
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GST_DEBUG_OBJECT (asfparse, "Received packet of length %" G_GUINT32_FORMAT
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", padding %" G_GUINT32_FORMAT ", send time %" G_GUINT32_FORMAT
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", duration %" G_GUINT16_FORMAT " and %s keyframe(s)",
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packetinfo->packet_size, packetinfo->padding,
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packetinfo->send_time, packetinfo->duration,
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(packetinfo->has_keyframe) ? "with" : "without");
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/* set gstbuffer fields */
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if (!packetinfo->has_keyframe) {
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GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
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}
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GST_BUFFER_TIMESTAMP (buffer) = ((GstClockTime) packetinfo->send_time)
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* GST_MSECOND;
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GST_BUFFER_DURATION (buffer) = ((GstClockTime) packetinfo->duration)
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* GST_MSECOND;
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return gst_asf_parse_push (asfparse, buffer);
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error:
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GST_ERROR_OBJECT (asfparse, "Error while parsing data packet");
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return GST_FLOW_ERROR;
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}
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static GstFlowReturn
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gst_asf_parse_pull_headers (GstAsfParse * asfparse)
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{
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GstBuffer *guid_and_size = NULL;
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GstBuffer *headers = NULL;
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guint64 size;
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GstFlowReturn ret;
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GstMapInfo map;
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if ((ret = gst_pad_pull_range (asfparse->sinkpad, asfparse->offset,
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ASF_GUID_OBJSIZE_SIZE, &guid_and_size)) != GST_FLOW_OK) {
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GST_ERROR_OBJECT (asfparse, "Failed to pull data from headers");
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goto leave;
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}
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asfparse->offset += ASF_GUID_OBJSIZE_SIZE;
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gst_buffer_map (guid_and_size, &map, GST_MAP_READ);
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size = gst_asf_match_and_peek_obj_size (map.data,
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&(guids[ASF_HEADER_OBJECT_INDEX]));
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gst_buffer_unmap (guid_and_size, &map);
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if (size == 0) {
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GST_ERROR_OBJECT (asfparse, "ASF starting identifier missing");
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goto leave;
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}
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if ((ret = gst_pad_pull_range (asfparse->sinkpad, asfparse->offset,
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size - ASF_GUID_OBJSIZE_SIZE, &headers)) != GST_FLOW_OK) {
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GST_ERROR_OBJECT (asfparse, "Failed to pull data from headers");
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goto leave;
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}
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headers = gst_buffer_append (guid_and_size, headers);
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guid_and_size = NULL;
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asfparse->offset += size - ASF_GUID_OBJSIZE_SIZE;
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if (!gst_asf_parse_headers (headers, asfparse->asfinfo)) {
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goto leave;
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}
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return gst_asf_parse_push (asfparse, headers);
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leave:
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if (headers)
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gst_buffer_unref (headers);
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if (guid_and_size)
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gst_buffer_unref (guid_and_size);
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return ret;
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}
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static GstFlowReturn
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gst_asf_parse_pull_data_header (GstAsfParse * asfparse)
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{
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GstBuffer *buf = NULL;
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GstFlowReturn ret;
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if ((ret = gst_pad_pull_range (asfparse->sinkpad, asfparse->offset,
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ASF_DATA_OBJECT_SIZE, &buf)) != GST_FLOW_OK) {
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GST_ERROR_OBJECT (asfparse, "Failed to pull data header");
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return ret;
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}
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asfparse->offset += ASF_DATA_OBJECT_SIZE;
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asfparse->data_size = gst_asf_match_and_peek_obj_size_buf (buf,
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&(guids[ASF_DATA_OBJECT_INDEX]));
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if (asfparse->data_size == 0) {
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GST_ERROR_OBJECT (asfparse, "Unexpected object, was expecting data object");
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gst_buffer_unref (buf);
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return GST_FLOW_ERROR;
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}
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return gst_asf_parse_parse_data_object (asfparse, buf);
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}
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static GstFlowReturn
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gst_asf_parse_pull_packets (GstAsfParse * asfparse)
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{
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GstFlowReturn ret;
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while (asfparse->asfinfo->broadcast ||
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asfparse->parsed_packets < asfparse->asfinfo->packets_count) {
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GstBuffer *packet;
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GST_DEBUG_OBJECT (asfparse, "Parsing packet %" G_GUINT64_FORMAT,
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asfparse->parsed_packets);
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/* get the packet */
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packet = NULL;
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ret = gst_pad_pull_range (asfparse->sinkpad, asfparse->offset,
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asfparse->asfinfo->packet_size, &packet);
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if (ret != GST_FLOW_OK)
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return ret;
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asfparse->parsed_packets++;
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asfparse->offset += asfparse->asfinfo->packet_size;
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/* parse the packet */
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ret = gst_asf_parse_parse_packet (asfparse, packet);
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if (ret != GST_FLOW_OK)
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return ret;
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}
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return GST_FLOW_OK;
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}
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static GstFlowReturn
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gst_asf_parse_pull_indexes (GstAsfParse * asfparse)
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{
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GstBuffer *guid_and_size;
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GstBuffer *buf;
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guint64 obj_size;
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GstFlowReturn ret = GST_FLOW_OK;
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while (1) {
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guid_and_size = NULL;
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ret = gst_pad_pull_range (asfparse->sinkpad, asfparse->offset,
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ASF_GUID_OBJSIZE_SIZE, &guid_and_size);
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if (ret != GST_FLOW_OK)
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break;
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/* we can peek at the object size */
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obj_size = gst_asf_match_and_peek_obj_size_buf (guid_and_size, NULL);
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if (obj_size == 0) {
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GST_ERROR_OBJECT (asfparse, "Incomplete object found");
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gst_buffer_unref (guid_and_size);
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ret = GST_FLOW_ERROR;
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break;
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}
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asfparse->offset += ASF_GUID_OBJSIZE_SIZE;
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/* pull the rest of the object */
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buf = NULL;
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ret = gst_pad_pull_range (asfparse->sinkpad, asfparse->offset, obj_size,
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&buf);
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if (ret != GST_FLOW_OK) {
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gst_buffer_unref (guid_and_size);
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break;
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}
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asfparse->offset += obj_size - ASF_GUID_OBJSIZE_SIZE;
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buf = gst_buffer_append (guid_and_size, buf);
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ret = gst_asf_parse_push (asfparse, buf);
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if (ret != GST_FLOW_OK)
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break;
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}
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return ret;
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}
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static void
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gst_asf_parse_loop (GstPad * pad)
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{
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GstFlowReturn ret = GST_FLOW_OK;
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GstAsfParse *asfparse = GST_ASF_PARSE_CAST (GST_OBJECT_PARENT (pad));
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GST_LOG_OBJECT (asfparse, "Processing data in loop function");
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switch (asfparse->parse_state) {
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case ASF_PARSING_HEADERS:
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GST_INFO_OBJECT (asfparse, "Starting to parse headers");
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ret = gst_asf_parse_pull_headers (asfparse);
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if (ret != GST_FLOW_OK)
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goto pause;
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asfparse->parse_state = ASF_PARSING_DATA;
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case ASF_PARSING_DATA:
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GST_INFO_OBJECT (asfparse, "Parsing data object headers");
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ret = gst_asf_parse_pull_data_header (asfparse);
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if (ret != GST_FLOW_OK)
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goto pause;
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asfparse->parse_state = ASF_PARSING_PACKETS;
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case ASF_PARSING_PACKETS:
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GST_INFO_OBJECT (asfparse, "Starting packet parsing");
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GST_INFO_OBJECT (asfparse, "Broadcast mode %s",
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asfparse->asfinfo->broadcast ? "on" : "off");
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ret = gst_asf_parse_pull_packets (asfparse);
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if (ret != GST_FLOW_OK)
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goto pause;
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/* test if all packets have been processed */
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if (!asfparse->asfinfo->broadcast &&
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asfparse->parsed_packets == asfparse->asfinfo->packets_count) {
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GST_INFO_OBJECT (asfparse,
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"All %" G_GUINT64_FORMAT " packets processed",
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asfparse->parsed_packets);
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asfparse->parse_state = ASF_PARSING_INDEXES;
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}
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case ASF_PARSING_INDEXES:
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/* we currently don't care about indexes, so just push them forward */
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GST_INFO_OBJECT (asfparse, "Starting indexes parsing");
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ret = gst_asf_parse_pull_indexes (asfparse);
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if (ret != GST_FLOW_OK)
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goto pause;
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default:
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break;
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}
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pause:
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{
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const gchar *reason = gst_flow_get_name (ret);
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GST_INFO_OBJECT (asfparse, "Pausing sinkpad task");
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gst_pad_pause_task (pad);
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if (ret == GST_FLOW_EOS) {
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gst_pad_push_event (asfparse->srcpad, gst_event_new_eos ());
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} else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
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GST_ELEMENT_ERROR (asfparse, STREAM, FAILED,
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(NULL), ("streaming task paused, reason %s (%d)", reason, ret));
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gst_pad_push_event (asfparse->srcpad, gst_event_new_eos ());
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}
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}
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}
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static GstFlowReturn
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gst_asf_parse_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
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{
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GstAsfParse *asfparse;
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GstFlowReturn ret = GST_FLOW_OK;
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asfparse = GST_ASF_PARSE (parent);
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gst_adapter_push (asfparse->adapter, buffer);
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switch (asfparse->parse_state) {
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case ASF_PARSING_HEADERS:
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if (asfparse->headers_size == 0 &&
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gst_adapter_available (asfparse->adapter) >= ASF_GUID_OBJSIZE_SIZE) {
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/* we can peek at the object size */
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asfparse->headers_size =
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gst_asf_match_and_peek_obj_size (gst_adapter_map
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(asfparse->adapter, ASF_GUID_OBJSIZE_SIZE),
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&(guids[ASF_HEADER_OBJECT_INDEX]));
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gst_adapter_unmap (asfparse->adapter);
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if (asfparse->headers_size == 0) {
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/* something is wrong, this probably ain't an ASF stream */
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GST_ERROR_OBJECT (asfparse, "ASF starting identifier missing");
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ret = GST_FLOW_ERROR;
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goto end;
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}
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}
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if (gst_adapter_available (asfparse->adapter) >= asfparse->headers_size) {
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GstBuffer *headers = gst_adapter_take_buffer (asfparse->adapter,
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asfparse->headers_size);
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if (gst_asf_parse_headers (headers, asfparse->asfinfo)) {
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ret = gst_asf_parse_push (asfparse, headers);
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asfparse->parse_state = ASF_PARSING_DATA;
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} else {
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ret = GST_FLOW_ERROR;
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GST_ERROR_OBJECT (asfparse, "Failed to parse headers");
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}
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}
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break;
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case ASF_PARSING_DATA:
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if (asfparse->data_size == 0 &&
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gst_adapter_available (asfparse->adapter) >= ASF_GUID_OBJSIZE_SIZE) {
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/* we can peek at the object size */
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asfparse->data_size =
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gst_asf_match_and_peek_obj_size (gst_adapter_map
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(asfparse->adapter, ASF_GUID_OBJSIZE_SIZE),
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&(guids[ASF_DATA_OBJECT_INDEX]));
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gst_adapter_unmap (asfparse->adapter);
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if (asfparse->data_size == 0) {
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/* something is wrong */
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GST_ERROR_OBJECT (asfparse, "Unexpected object after headers, was "
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"expecting a data object");
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ret = GST_FLOW_ERROR;
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goto end;
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}
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}
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/* if we have received the full data object headers */
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if (gst_adapter_available (asfparse->adapter) >= ASF_DATA_OBJECT_SIZE) {
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ret = gst_asf_parse_parse_data_object (asfparse,
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gst_adapter_take_buffer (asfparse->adapter, ASF_DATA_OBJECT_SIZE));
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if (ret != GST_FLOW_OK) {
|
|
goto end;
|
|
}
|
|
asfparse->parse_state = ASF_PARSING_PACKETS;
|
|
}
|
|
break;
|
|
case ASF_PARSING_PACKETS:
|
|
g_assert (asfparse->asfinfo->packet_size);
|
|
while ((asfparse->asfinfo->broadcast ||
|
|
asfparse->parsed_packets < asfparse->asfinfo->packets_count) &&
|
|
gst_adapter_available (asfparse->adapter) >=
|
|
asfparse->asfinfo->packet_size) {
|
|
GstBuffer *packet = gst_adapter_take_buffer (asfparse->adapter,
|
|
asfparse->asfinfo->packet_size);
|
|
asfparse->parsed_packets++;
|
|
ret = gst_asf_parse_parse_packet (asfparse, packet);
|
|
if (ret != GST_FLOW_OK)
|
|
goto end;
|
|
}
|
|
if (!asfparse->asfinfo->broadcast &&
|
|
asfparse->parsed_packets >= asfparse->asfinfo->packets_count) {
|
|
GST_INFO_OBJECT (asfparse, "Finished parsing packets");
|
|
asfparse->parse_state = ASF_PARSING_INDEXES;
|
|
}
|
|
break;
|
|
case ASF_PARSING_INDEXES:
|
|
/* we currently don't care about any of those objects */
|
|
if (gst_adapter_available (asfparse->adapter) >= ASF_GUID_OBJSIZE_SIZE) {
|
|
guint64 obj_size;
|
|
/* we can peek at the object size */
|
|
obj_size = gst_asf_match_and_peek_obj_size (gst_adapter_map
|
|
(asfparse->adapter, ASF_GUID_OBJSIZE_SIZE), NULL);
|
|
gst_adapter_unmap (asfparse->adapter);
|
|
if (gst_adapter_available (asfparse->adapter) >= obj_size) {
|
|
GST_DEBUG_OBJECT (asfparse, "Skiping object");
|
|
ret = gst_asf_parse_push (asfparse,
|
|
gst_adapter_take_buffer (asfparse->adapter, obj_size));
|
|
if (ret != GST_FLOW_OK) {
|
|
goto end;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
end:
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
gst_asf_parse_finalize (GObject * object)
|
|
{
|
|
GstAsfParse *asfparse = GST_ASF_PARSE (object);
|
|
gst_adapter_clear (asfparse->adapter);
|
|
g_object_unref (G_OBJECT (asfparse->adapter));
|
|
gst_caps_unref (asfparse->outcaps);
|
|
gst_asf_file_info_free (asfparse->asfinfo);
|
|
g_free (asfparse->packetinfo);
|
|
G_OBJECT_CLASS (parent_class)->finalize (object);
|
|
}
|
|
|
|
static void
|
|
gst_asf_parse_class_init (GstAsfParseClass * klass)
|
|
{
|
|
GObjectClass *gobject_class;
|
|
GstElementClass *gstelement_class;
|
|
|
|
gobject_class = (GObjectClass *) klass;
|
|
gstelement_class = (GstElementClass *) klass;
|
|
|
|
parent_class = g_type_class_peek_parent (klass);
|
|
|
|
gobject_class->finalize = gst_asf_parse_finalize;
|
|
|
|
gstelement_class->change_state =
|
|
GST_DEBUG_FUNCPTR (gst_asf_parse_change_state);
|
|
|
|
gst_element_class_add_pad_template (gstelement_class,
|
|
gst_static_pad_template_get (&src_factory));
|
|
gst_element_class_add_pad_template (gstelement_class,
|
|
gst_static_pad_template_get (&sink_factory));
|
|
|
|
gst_element_class_set_details_simple (gstelement_class, "ASF parser",
|
|
"Parser", "Parses ASF", "Thiago Santos <thiagoss@embedded.ufcg.edu.br>");
|
|
|
|
GST_DEBUG_CATEGORY_INIT (asfparse_debug, "asfparse", 0,
|
|
"Parser for ASF streams");
|
|
}
|
|
|
|
static void
|
|
gst_asf_parse_init (GstAsfParse * asfparse)
|
|
{
|
|
asfparse->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
|
|
gst_pad_set_chain_function (asfparse->sinkpad, gst_asf_parse_chain);
|
|
gst_pad_set_activate_function (asfparse->sinkpad,
|
|
gst_asf_parse_sink_activate);
|
|
gst_pad_set_activatemode_function (asfparse->sinkpad,
|
|
gst_asf_parse_sink_activate_mode);
|
|
gst_element_add_pad (GST_ELEMENT (asfparse), asfparse->sinkpad);
|
|
|
|
asfparse->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
|
|
gst_pad_use_fixed_caps (asfparse->srcpad);
|
|
gst_element_add_pad (GST_ELEMENT (asfparse), asfparse->srcpad);
|
|
|
|
asfparse->adapter = gst_adapter_new ();
|
|
asfparse->outcaps = gst_caps_new_empty_simple ("video/x-ms-asf");
|
|
asfparse->asfinfo = gst_asf_file_info_new ();
|
|
asfparse->packetinfo = g_new0 (GstAsfPacketInfo, 1);
|
|
gst_asf_parse_reset (asfparse);
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_asf_parse_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstAsfParse *asfparse;
|
|
GstStateChangeReturn ret;
|
|
|
|
asfparse = GST_ASF_PARSE (element);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
gst_asf_parse_reset (asfparse);
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
if (ret == GST_STATE_CHANGE_FAILURE)
|
|
goto done;
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_NULL:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
done:
|
|
return ret;
|
|
}
|
|
|
|
gboolean
|
|
gst_asf_parse_plugin_init (GstPlugin * plugin)
|
|
{
|
|
return gst_element_register (plugin, "asfparse",
|
|
GST_RANK_NONE, GST_TYPE_ASF_PARSE);
|
|
}
|