gstreamer/gst/asfmux/gstasfparse.c

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/* ASF parser plugin for GStreamer
* Copyright (C) 2009 Thiago Santos <thiagoss@embedded.ufcg.edu.br>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "gstasfparse.h"
/* FIXME add this include
* #include <gst/gst-i18n-plugin.h> */
GST_DEBUG_CATEGORY_STATIC (asfparse_debug);
#define GST_CAT_DEFAULT asfparse_debug
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-ms-asf, parsed = (boolean) true")
);
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-ms-asf, parsed = (boolean) false")
);
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#define gst_asf_parse_parent_class parent_class
G_DEFINE_TYPE (GstAsfParse, gst_asf_parse, GST_TYPE_BASE_PARSE);
GST_ELEMENT_REGISTER_DEFINE (asfparse, "asfparse",
GST_RANK_NONE, GST_TYPE_ASF_PARSE);
static gboolean
gst_asf_parse_start (GstBaseParse * parse)
{
GstAsfParse *asfparse = GST_ASF_PARSE_CAST (parse);
gst_asf_file_info_reset (asfparse->asfinfo);
asfparse->parse_state = ASF_PARSING_HEADERS;
asfparse->parsed_packets = 0;
/* ASF Obj header length */
gst_base_parse_set_min_frame_size (GST_BASE_PARSE_CAST (asfparse),
ASF_GUID_OBJSIZE_SIZE);
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gst_base_parse_set_syncable (GST_BASE_PARSE_CAST (asfparse), FALSE);
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return TRUE;
}
static gboolean
gst_asf_parse_stop (GstBaseParse * parse)
{
GstAsfParse *asfparse = GST_ASF_PARSE_CAST (parse);
gst_asf_file_info_reset (asfparse->asfinfo);
return TRUE;
}
static GstFlowReturn
gst_asf_parse_parse_data_object (GstAsfParse * asfparse, guint8 * data,
gsize size)
{
GstByteReader reader;
GstFlowReturn ret = GST_FLOW_OK;
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guint64 packet_count = 0;
GST_DEBUG_OBJECT (asfparse, "Parsing data object");
gst_byte_reader_init (&reader, data, size);
/* skip to packet count */
if (!gst_byte_reader_skip (&reader, 40))
goto error;
if (!gst_byte_reader_get_uint64_le (&reader, &packet_count))
goto error;
if (asfparse->asfinfo->packets_count != packet_count) {
GST_WARNING_OBJECT (asfparse, "File properties object and data object have "
"different packets count, %" G_GUINT64_FORMAT " %" G_GUINT64_FORMAT,
asfparse->asfinfo->packets_count, packet_count);
} else {
GST_DEBUG_OBJECT (asfparse, "Total packets: %" G_GUINT64_FORMAT,
packet_count);
}
return GST_FLOW_OK;
error:
ret = GST_FLOW_ERROR;
GST_ERROR_OBJECT (asfparse, "Error while parsing data object headers");
return ret;
}
static GstFlowReturn
gst_asf_parse_parse_packet (GstAsfParse * asfparse, GstBaseParseFrame * frame,
GstMapInfo * map)
{
GstBuffer *buffer = frame->buffer;
GstAsfPacketInfo *packetinfo = asfparse->packetinfo;
/* gst_asf_parse_packet_* won't accept size larger than the packet size, so we assume
* it will always be packet_size here */
g_return_val_if_fail (map->size >= asfparse->asfinfo->packet_size,
GST_FLOW_ERROR);
if (!gst_asf_parse_packet_from_data (map->data,
asfparse->asfinfo->packet_size, buffer, packetinfo, FALSE,
asfparse->asfinfo->packet_size))
goto error;
GST_DEBUG_OBJECT (asfparse, "Received packet of length %" G_GUINT32_FORMAT
", padding %" G_GUINT32_FORMAT ", send time %" G_GUINT32_FORMAT
", duration %" G_GUINT16_FORMAT " and %s keyframe(s)",
packetinfo->packet_size, packetinfo->padding,
packetinfo->send_time, packetinfo->duration,
(packetinfo->has_keyframe) ? "with" : "without");
/* set gstbuffer fields */
if (!packetinfo->has_keyframe) {
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
}
GST_BUFFER_TIMESTAMP (buffer) = ((GstClockTime) packetinfo->send_time)
* GST_MSECOND;
GST_BUFFER_DURATION (buffer) = ((GstClockTime) packetinfo->duration)
* GST_MSECOND;
return GST_FLOW_OK;
error:
GST_ERROR_OBJECT (asfparse, "Error while parsing data packet");
return GST_FLOW_ERROR;
}
/* reads the next object and pushes it through without parsing */
static GstFlowReturn
gst_asf_parse_handle_frame_push_object (GstAsfParse * asfparse,
GstBaseParseFrame * frame, gint * skipsize, const Guid * guid)
{
GstBuffer *buffer = frame->buffer;
GstMapInfo map;
GstFlowReturn ret = GST_FLOW_OK;
gst_buffer_map (buffer, &map, GST_MAP_READ);
if (map.size >= ASF_GUID_OBJSIZE_SIZE) {
guint64 size;
size = gst_asf_match_and_peek_obj_size (map.data, guid);
if (size == 0) {
GST_ERROR_OBJECT (asfparse, "GUID starting identifier missing");
ret = GST_FLOW_ERROR;
gst_buffer_unmap (buffer, &map);
goto end;
}
if (size > map.size) {
/* request all the obj data */
gst_base_parse_set_min_frame_size (GST_BASE_PARSE_CAST (asfparse), size);
gst_buffer_unmap (buffer, &map);
goto end;
}
gst_buffer_unmap (buffer, &map);
gst_base_parse_set_min_frame_size (GST_BASE_PARSE_CAST (asfparse),
ASF_GUID_OBJSIZE_SIZE);
gst_base_parse_finish_frame (GST_BASE_PARSE_CAST (asfparse), frame, size);
} else {
gst_buffer_unmap (buffer, &map);
*skipsize = 0;
}
end:
return ret;
}
static GstFlowReturn
gst_asf_parse_handle_frame_headers (GstAsfParse * asfparse,
GstBaseParseFrame * frame, gint * skipsize)
{
GstBuffer *buffer = frame->buffer;
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GstMapInfo map;
GstFlowReturn ret = GST_FLOW_OK;
gst_buffer_map (buffer, &map, GST_MAP_READ);
if (map.size >= ASF_GUID_OBJSIZE_SIZE) {
guint64 size;
size = gst_asf_match_and_peek_obj_size (map.data,
&(guids[ASF_HEADER_OBJECT_INDEX]));
if (size == 0) {
GST_ERROR_OBJECT (asfparse, "ASF starting identifier missing");
ret = GST_FLOW_ERROR;
gst_buffer_unmap (buffer, &map);
goto end;
}
if (size > map.size) {
/* request all the obj data */
gst_base_parse_set_min_frame_size (GST_BASE_PARSE_CAST (asfparse), size);
gst_buffer_unmap (buffer, &map);
goto end;
}
if (gst_asf_parse_headers_from_data (map.data, map.size, asfparse->asfinfo)) {
GST_DEBUG_OBJECT (asfparse, "Successfully parsed headers");
asfparse->parse_state = ASF_PARSING_DATA;
gst_buffer_unmap (buffer, &map);
GST_INFO_OBJECT (asfparse, "Broadcast mode %s",
asfparse->asfinfo->broadcast ? "on" : "off");
gst_base_parse_set_min_frame_size (GST_BASE_PARSE_CAST (asfparse),
ASF_GUID_OBJSIZE_SIZE);
gst_pad_push_event (GST_BASE_PARSE_SRC_PAD (asfparse),
gst_event_new_caps (gst_caps_new_simple ("video/x-ms-asf", "parsed",
G_TYPE_BOOLEAN, TRUE, NULL)));
gst_base_parse_finish_frame (GST_BASE_PARSE_CAST (asfparse), frame, size);
} else {
ret = GST_FLOW_ERROR;
}
} else {
gst_buffer_unmap (buffer, &map);
*skipsize = 0;
}
end:
return ret;
}
static GstFlowReturn
gst_asf_parse_handle_frame_data_header (GstAsfParse * asfparse,
GstBaseParseFrame * frame, gint * skipsize)
{
GstBuffer *buffer = frame->buffer;
GstMapInfo map;
GstFlowReturn ret = GST_FLOW_OK;
gst_buffer_map (buffer, &map, GST_MAP_READ);
if (map.size >= ASF_GUID_OBJSIZE_SIZE) {
guint64 size;
size = gst_asf_match_and_peek_obj_size (map.data,
&(guids[ASF_DATA_OBJECT_INDEX]));
if (size == 0) {
GST_ERROR_OBJECT (asfparse, "ASF data object missing");
ret = GST_FLOW_ERROR;
gst_buffer_unmap (buffer, &map);
goto end;
}
if (ASF_DATA_OBJECT_SIZE > map.size) {
/* request all the obj data header size */
gst_base_parse_set_min_frame_size (GST_BASE_PARSE_CAST (asfparse),
ASF_DATA_OBJECT_SIZE);
gst_buffer_unmap (buffer, &map);
goto end;
}
if (gst_asf_parse_parse_data_object (asfparse, map.data,
map.size) == GST_FLOW_OK) {
GST_DEBUG_OBJECT (asfparse, "Successfully parsed data object");
asfparse->parse_state = ASF_PARSING_PACKETS;
gst_buffer_unmap (buffer, &map);
gst_base_parse_set_min_frame_size (GST_BASE_PARSE_CAST (asfparse),
asfparse->asfinfo->packet_size);
gst_base_parse_finish_frame (GST_BASE_PARSE_CAST (asfparse), frame,
ASF_DATA_OBJECT_SIZE);
}
} else {
gst_buffer_unmap (buffer, &map);
*skipsize = 0;
}
end:
return ret;
}
static GstFlowReturn
gst_asf_parse_handle_frame_packets (GstAsfParse * asfparse,
GstBaseParseFrame * frame, gint * skipsize)
{
GstBuffer *buffer = frame->buffer;
GstMapInfo map;
GstFlowReturn ret = GST_FLOW_OK;
GST_LOG_OBJECT (asfparse, "Packet parsing");
gst_buffer_map (buffer, &map, GST_MAP_READ);
if (G_LIKELY (map.size >= asfparse->asfinfo->packet_size)) {
GST_DEBUG_OBJECT (asfparse, "Parsing packet %" G_GUINT64_FORMAT,
asfparse->parsed_packets);
ret = gst_asf_parse_parse_packet (asfparse, frame, &map);
gst_buffer_unmap (buffer, &map);
if (ret == GST_FLOW_OK) {
asfparse->parsed_packets++;
gst_base_parse_finish_frame (GST_BASE_PARSE_CAST (asfparse), frame,
asfparse->asfinfo->packet_size);
/* test if all packets have been processed */
if (G_UNLIKELY (!asfparse->asfinfo->broadcast &&
asfparse->parsed_packets == asfparse->asfinfo->packets_count)) {
GST_INFO_OBJECT (asfparse,
"All %" G_GUINT64_FORMAT " packets processed",
asfparse->parsed_packets);
asfparse->parse_state = ASF_PARSING_INDEXES;
gst_base_parse_set_min_frame_size (GST_BASE_PARSE_CAST (asfparse),
ASF_GUID_OBJSIZE_SIZE);
}
}
} else {
gst_base_parse_set_min_frame_size (GST_BASE_PARSE_CAST (asfparse),
asfparse->asfinfo->packet_size);
gst_buffer_unmap (buffer, &map);
*skipsize = 0;
}
return ret;
}
static GstFlowReturn
gst_asf_parse_handle_frame_indexes (GstAsfParse * asfparse,
GstBaseParseFrame * frame, gint * skipsize)
{
/* don't care about indexes, just push them forward */
return gst_asf_parse_handle_frame_push_object (asfparse, frame, skipsize,
NULL);
}
static GstFlowReturn
gst_asf_parse_handle_frame (GstBaseParse * parse,
GstBaseParseFrame * frame, gint * skipsize)
{
GstAsfParse *asfparse = GST_ASF_PARSE_CAST (parse);
switch (asfparse->parse_state) {
case ASF_PARSING_HEADERS:
return gst_asf_parse_handle_frame_headers (asfparse, frame, skipsize);
case ASF_PARSING_DATA:
return gst_asf_parse_handle_frame_data_header (asfparse, frame, skipsize);
case ASF_PARSING_PACKETS:
return gst_asf_parse_handle_frame_packets (asfparse, frame, skipsize);
case ASF_PARSING_INDEXES:
return gst_asf_parse_handle_frame_indexes (asfparse, frame, skipsize);
default:
break;
}
g_assert_not_reached ();
return GST_FLOW_ERROR;
}
static void
gst_asf_parse_finalize (GObject * object)
{
GstAsfParse *asfparse = GST_ASF_PARSE (object);
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;
GstBaseParseClass *gstbaseparse_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstbaseparse_class = (GstBaseParseClass *) klass;
gobject_class->finalize = gst_asf_parse_finalize;
gstbaseparse_class->start = gst_asf_parse_start;
gstbaseparse_class->stop = gst_asf_parse_stop;
gstbaseparse_class->handle_frame = gst_asf_parse_handle_frame;
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gst_element_class_add_static_pad_template (gstelement_class, &src_factory);
gst_element_class_add_static_pad_template (gstelement_class, &sink_factory);
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gst_element_class_set_static_metadata (gstelement_class, "ASF parser",
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"Parser", "Parses ASF", "Thiago Santos <thiagoss@embedded.ufcg.edu.br>");
GST_DEBUG_CATEGORY_INIT (asfparse_debug, "asfparse", 0,
"Parser for ASF streams");
}
static void
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gst_asf_parse_init (GstAsfParse * asfparse)
{
asfparse->asfinfo = gst_asf_file_info_new ();
asfparse->packetinfo = g_new0 (GstAsfPacketInfo, 1);
}