mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-12-26 18:20:44 +00:00
Code Issues 1 Projects Releases Wiki Activity
gstreamer/gst/asfdemux/gstasfdemux.c
Wim Taymans c825677105 Lower the rank, the typefind functions are broken 
Original commit message from CVS:
Lower the rank, the typefind functions are broken
2002-11-02 13:39:23 +00:00

1356 lines
38 KiB
C
Raw Blame History

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
//#define GST_DEBUG_ENABLED
#include "gstasfdemux.h"
enum {
ASF_OBJ_UNDEFINED = 0,
ASF_OBJ_STREAM,
ASF_OBJ_DATA,
ASF_OBJ_FILE,
ASF_OBJ_HEADER,
ASF_OBJ_CONCEAL_NONE,
ASF_OBJ_COMMENT,
ASF_OBJ_CODEC_COMMENT,
ASF_OBJ_INDEX,
ASF_OBJ_HEAD1,
ASF_OBJ_HEAD2,
ASF_OBJ_PADDING,
};
enum {
ASF_STREAM_UNDEFINED = 0,
ASF_STREAM_VIDEO,
ASF_STREAM_AUDIO,
};
enum {
ASF_CORRECTION_UNDEFINED = 0,
ASF_CORRECTION_ON,
ASF_CORRECTION_OFF,
};
static GstASFGuidHash asf_correction_guids[] = {
{ ASF_CORRECTION_ON, { 0xBFC3CD50, 0x11CF618F, 0xAA00B28B, 0x20E2B400 }},
{ ASF_CORRECTION_OFF, { 0x20FB5700, 0x11CF5B55, 0x8000FDA8, 0x2B445C5F }},
{ ASF_CORRECTION_UNDEFINED, { 0, 0, 0, 0 }},
};
static GstASFGuidHash asf_stream_guids[] = {
{ ASF_STREAM_VIDEO, { 0xBC19EFC0, 0x11CF5B4D, 0x8000FDA8, 0x2B445C5F }},
{ ASF_STREAM_AUDIO, { 0xF8699E40, 0x11CF5B4D, 0x8000FDA8, 0x2B445C5F }},
{ ASF_STREAM_UNDEFINED, { 0, 0, 0, 0 }},
};
static GstASFGuidHash asf_object_guids[] = {
{ ASF_OBJ_STREAM, { 0xB7DC0791, 0x11CFA9B7, 0xC000E68E, 0x6553200C }},
{ ASF_OBJ_DATA, { 0x75b22636, 0x11cf668e, 0xAA00D9a6, 0x6Cce6200 }},
{ ASF_OBJ_FILE, { 0x8CABDCA1, 0x11CFA947, 0xC000E48E, 0x6553200C }},
{ ASF_OBJ_HEADER, { 0x75B22630, 0x11CF668E, 0xAA00D9A6, 0x6CCE6200 }},
{ ASF_OBJ_CONCEAL_NONE, { 0x20fb5700, 0x11cf5b55, 0x8000FDa8, 0x2B445C5f }},
{ ASF_OBJ_COMMENT, { 0x75b22633, 0x11cf668e, 0xAA00D9a6, 0x6Cce6200 }},
{ ASF_OBJ_CODEC_COMMENT, { 0x86D15240, 0x11D0311D, 0xA000A4A3, 0xF64803C9 }},
{ ASF_OBJ_CODEC_COMMENT, { 0x86d15241, 0x11d0311d, 0xA000A4a3, 0xF64803c9 }},
{ ASF_OBJ_INDEX, { 0x33000890, 0x11cfe5b1, 0xA000F489, 0xCB4903c9 }},
{ ASF_OBJ_HEAD1, { 0x5fbf03b5, 0x11cfa92e, 0xC000E38e, 0x6553200c }},
{ ASF_OBJ_HEAD2, { 0xabd3d211, 0x11cfa9ba, 0xC000E68e, 0x6553200c }},
{ ASF_OBJ_PADDING, { 0x1806D474, 0x4509CADF, 0xAB9ABAA4, 0xE8AA96CD }},
{ ASF_OBJ_UNDEFINED, { 0, 0, 0, 0 }},
};
struct _asf_obj_header {
guint32 num_objects;
guint8 unknown1;
guint8 unknown2;
};
typedef struct _asf_obj_header asf_obj_header;
struct _asf_obj_file {
GstASFGuid file_id;
guint64 file_size;
guint64 creation_time;
guint64 packets_count;
guint64 play_time;
guint64 send_time;
guint64 preroll;
guint32 flags;
guint32 min_pktsize;
guint32 max_pktsize;
guint32 min_bitrate;
};
typedef struct _asf_obj_file asf_obj_file;
struct _asf_obj_stream {
GstASFGuid type;
GstASFGuid correction;
guint64 offset;
guint32 unknown1;
guint32 unknown2;
guint16 flags;
guint32 unknown3;
};
typedef struct _asf_obj_stream asf_obj_stream;
struct _asf_stream_audio {
guint16 codec_tag;
guint16 channels;
guint32 sample_rate;
guint32 byte_rate;
guint16 block_align;
guint16 word_size;
guint16 size;
};
typedef struct _asf_stream_audio asf_stream_audio;
struct _asf_stream_correction {
guint8 span;
guint16 packet_size;
guint16 chunk_size;
guint16 data_size;
guint8 silence_data;
};
typedef struct _asf_stream_correction asf_stream_correction;
struct _asf_stream_video {
guint32 width;
guint32 height;
guint8 unknown;
guint16 size;
};
typedef struct _asf_stream_video asf_stream_video;
struct _asf_stream_video_format {
guint32 size;
guint32 width;
guint32 height;
guint16 panes;
guint16 depth;
guint32 tag;
guint32 unknown1;
guint32 unknown2;
guint32 unknown3;
guint32 unknown4;
guint32 unknown5;
};
typedef struct _asf_stream_video_format asf_stream_video_format;
struct _asf_obj_data {
GstASFGuid file_id;
guint64 packets;
guint8 unknown1;
guint8 unknown2;
guint8 correction;
};
typedef struct _asf_obj_data asf_obj_data;
struct _asf_obj_data_correction {
guint8 type;
guint8 cycle;
};
typedef struct _asf_obj_data_correction asf_obj_data_correction;
struct _asf_obj_data_packet {
guint8 flags;
guint8 property;
};
typedef struct _asf_obj_data_packet asf_obj_data_packet;
struct _asf_packet_info {
guint32 padsize;
guint8 replicsizetype;
guint8 fragoffsettype;
guint8 seqtype;
guint8 segsizetype;
gboolean multiple;
guint32 size_left;
};
typedef struct _asf_packet_info asf_packet_info;
struct _asf_segment_info {
guint8 stream_number;
guint32 chunk_size;
guint32 frag_offset;
guint32 sequence;
gboolean compressed;
};
typedef struct _asf_segment_info asf_segment_info;
struct _asf_replicated_data {
guint32 object_size;
guint32 frag_timestamp;
};
typedef struct _asf_replicated_data asf_replicated_data;
/* elementfactory information */
static GstElementDetails gst_asf_demux_details = {
"ASF Demuxer",
"Codec/Demuxer",
"LGPL",
"Demultiplexes ASF Streams",
VERSION,
"Owen Fraser-Green <owen@discobabe.net>",
"(C) 2002",
};
static GstCaps* asf_asf_type_find (GstBuffer *buf, gpointer private);
static GstCaps* asf_wma_type_find (GstBuffer *buf, gpointer private);
static GstCaps* asf_wax_type_find (GstBuffer *buf, gpointer private);
static GstCaps* asf_wmv_type_find (GstBuffer *buf, gpointer private);
static GstCaps* asf_wvx_type_find (GstBuffer *buf, gpointer private);
static GstCaps* asf_wm_type_find (GstBuffer *buf, gpointer private);
/* typefactory for 'asf' */
static GstTypeDefinition asf_type_definitions[] = {
{ "asfdemux_video/asf",
"video/x-ms-asf",
".asf .asx",
asf_asf_type_find },
{ "asfdemux_video/wma",
"video/x-ms-wma",
".wma",
asf_wma_type_find },
{ "asfdemux_video/wax",
"video/x-ms-wax",
".wax",
asf_wax_type_find },
{ "asfdemux_video/wmv",
"video/x-ms-wmv",
".wmv",
asf_wmv_type_find },
{ "asfdemux_video/wvx",
"video/x-ms-wvx",
".wvx",
asf_wvx_type_find },
{ "asfdemux_video/wm",
"video/x-ms-wm",
".wm",
asf_wm_type_find },
{ NULL, NULL, NULL, NULL }
};
static GstCaps*
asf_asf_type_find (GstBuffer *buf, gpointer private)
{
GstCaps *new;
/*!!! Check here if the header is a valid ASF 1.0. return NULL otherwise */
new = gst_caps_new (
"asf_type_find",
"video/x-ms-asf",
gst_props_new ("asfversion",
GST_PROPS_INT (1),
NULL));
return new;
}
static GstCaps*
asf_wma_type_find (GstBuffer *buf, gpointer private)
{
GstCaps *new;
/*!!! Check here if the header is a valid ASF 1.0. return NULL otherwise */
new = gst_caps_new (
"asf_type_find",
"video/x-ms-asf",
gst_props_new ("asfversion",
GST_PROPS_INT (1),
NULL));
return new;
}
static GstCaps*
asf_wax_type_find (GstBuffer *buf, gpointer private)
{
GstCaps *new;
/*!!! Check here if the header is a valid ASF 1.0. return NULL otherwise */
new = gst_caps_new (
"asf_type_find",
"video/x-ms-asf",
gst_props_new ("asfversion",
GST_PROPS_INT (1),
NULL));
return new;
}
static GstCaps*
asf_wmv_type_find (GstBuffer *buf, gpointer private)
{
GstCaps *new;
/*!!! Check here if the header is a valid ASF 1.0. return NULL otherwise */
new = gst_caps_new (
"asf_type_find",
"video/x-ms-asf",
gst_props_new ("asfversion",
GST_PROPS_INT (1),
NULL));
return new;
}
static GstCaps*
asf_wvx_type_find (GstBuffer *buf, gpointer private)
{
GstCaps *new;
/*!!! Check here if the header is a valid ASF 1.0. return NULL otherwise */
new = gst_caps_new (
"asf_type_find",
"video/x-ms-asf",
gst_props_new ("asfversion",
GST_PROPS_INT (1),
NULL));
return new;
}
static GstCaps*
asf_wm_type_find (GstBuffer *buf, gpointer private)
{
GstCaps *new;
/*!!! Check here if the header is a valid ASF 1.0. return NULL otherwise */
new = gst_caps_new (
"asf_type_find",
"video/x-ms-asf",
gst_props_new ("asfversion",
GST_PROPS_INT (1),
NULL));
return new;
}
GST_PAD_TEMPLATE_FACTORY (sink_factory,
"sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_CAPS_NEW ("asf_asf_demux_sink",
"video/x-ms-asf",
"asfversion", GST_PROPS_INT_RANGE (1, 1)
),
GST_CAPS_NEW ("asf_wma_demux_sink",
"video/x-ms-wma",
"asfversion", GST_PROPS_INT_RANGE (1, 1)
),
GST_CAPS_NEW ("asf_wax_demux_sink",
"video/x-ms-wax",
"asfversion", GST_PROPS_INT_RANGE (1, 1)
),
GST_CAPS_NEW ("asf_wmv_demux_sink",
"video/x-ms-wmv",
"asfversion", GST_PROPS_INT_RANGE (1, 1)
),
GST_CAPS_NEW ("asf_wvx_demux_sink",
"video/x-ms-wvx",
"asfversion", GST_PROPS_INT_RANGE (1, 1)
),
GST_CAPS_NEW ("asf_wm_demux_sink",
"video/x-ms-wm",
"asfversion", GST_PROPS_INT_RANGE (1, 1)
)
);
GST_PAD_TEMPLATE_FACTORY (audio_factory,
"audio_%02d",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_CAPS_NEW ("asf_demux_audio",
"audio/x-wav",
NULL
)
);
GST_PAD_TEMPLATE_FACTORY (video_factory,
"video_%02d",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_CAPS_NEW ("asf_demux_video_mpeg4",
"video/mpeg",
"mpegversion", GST_PROPS_INT (4),
"systemstream", GST_PROPS_BOOLEAN (FALSE),
NULL
)
);
static void gst_asf_demux_class_init (GstASFDemuxClass *klass);
static void gst_asf_demux_init (GstASFDemux *asf_demux);
static gboolean gst_asf_demux_send_event (GstElement *element,
GstEvent *event);
static void gst_asf_demux_loop (GstElement *element);
static gboolean gst_asf_demux_process_object (GstASFDemux *asf_demux,
guint64 *filepos);
static void gst_asf_demux_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static guint32 gst_asf_demux_identify_guid (GstASFDemux *asf_demux,
GstASFGuidHash *guids,
GstASFGuid *guid_raw);
static gboolean gst_asf_demux_process_chunk (GstASFDemux *asf_demux,
asf_packet_info *packet_info,
asf_segment_info *segment_info);
static const GstEventMask* gst_asf_demux_get_src_event_mask (GstPad *pad);
static gboolean gst_asf_demux_handle_src_event (GstPad *pad,
GstEvent *event);
static const GstFormat* gst_asf_demux_get_src_formats (GstPad *pad);
static const GstPadQueryType* gst_asf_demux_get_src_query_types (GstPad *pad);
static gboolean gst_asf_demux_handle_src_query (GstPad *pad,
GstPadQueryType type,
GstFormat *format, gint64 *value);
static GstElementStateReturn
gst_asf_demux_change_state (GstElement *element);
static GstElementClass *parent_class = NULL;
GType
asf_demux_get_type (void)
{
static GType asf_demux_type = 0;
if (!asf_demux_type) {
static const GTypeInfo asf_demux_info = {
sizeof(GstASFDemuxClass),
NULL,
NULL,
(GClassInitFunc)gst_asf_demux_class_init,
NULL,
NULL,
sizeof(GstASFDemux),
0,
(GInstanceInitFunc)gst_asf_demux_init,
};
asf_demux_type = g_type_register_static(GST_TYPE_ELEMENT, "GstASFDemux", &asf_demux_info, 0);
}
return asf_demux_type;
}
static void
gst_asf_demux_class_init (GstASFDemuxClass *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
gobject_class->get_property = gst_asf_demux_get_property;
gstelement_class->change_state = gst_asf_demux_change_state;
gstelement_class->send_event = gst_asf_demux_send_event;
}
static void
gst_asf_demux_init (GstASFDemux *asf_demux)
{
gint i;
asf_demux->sinkpad = gst_pad_new_from_template(
GST_PAD_TEMPLATE_GET (sink_factory), "sink");
gst_element_add_pad (GST_ELEMENT (asf_demux), asf_demux->sinkpad);
gst_element_set_loop_function (GST_ELEMENT (asf_demux), gst_asf_demux_loop);
/* i think everything is already zero'd, but oh well*/
for (i=0; i < GST_ASF_DEMUX_NUM_VIDEO_PADS; i++) {
asf_demux->video_pad[i] = NULL;
asf_demux->video_PTS[i] = 0;
}
for (i=0; i < GST_ASF_DEMUX_NUM_AUDIO_PADS; i++) {
asf_demux->audio_pad[i] = NULL;
asf_demux->audio_PTS[i] = 0;
}
asf_demux->num_audio_streams = 0;
asf_demux->num_video_streams = 0;
asf_demux->num_streams = 0;
GST_FLAG_SET (asf_demux, GST_ELEMENT_EVENT_AWARE);
}
static gboolean
gst_asf_demux_send_event (GstElement *element, GstEvent *event)
{
const GList *pads;
pads = gst_element_get_pad_list (element);
while (pads) {
GstPad *pad = GST_PAD (pads->data);
if (GST_PAD_DIRECTION (pad) == GST_PAD_SRC) {
/* we ref the event here as we might have to try again if the event
* failed on this pad */
gst_event_ref (event);
if (gst_asf_demux_handle_src_event (pad, event)) {
gst_event_unref (event);
return TRUE;
}
}
pads = g_list_next (pads);
}
gst_event_unref (event);
return FALSE;
}
static void
gst_asf_demux_loop (GstElement *element)
{
GstASFDemux *asf_demux;
guint64 filepos = 0;
g_return_if_fail (element != NULL);
g_return_if_fail (GST_IS_ASF_DEMUX (element));
asf_demux = GST_ASF_DEMUX (element);
asf_demux->restart = FALSE;
g_print ("asf_demux_loop called\n");
/* this is basically an infinite loop */
if (!gst_asf_demux_process_object (asf_demux, &filepos)) {
gst_element_error (element, "This doesn't appear to be an ASF stream");
return;
}
if (!asf_demux->restart)
/* if we exit the loop we are EOS */
gst_pad_event_default (asf_demux->sinkpad, gst_event_new (GST_EVENT_EOS));
}
static inline gboolean
gst_asf_demux_read_object_header (GstASFDemux *asf_demux, guint32 *obj_id, guint64 *obj_size)
{
guint32 got_bytes;
GstASFGuid *guid;
guint64 *size;
GstByteStream *bs = asf_demux->bs;
/* First get the GUID */
got_bytes = gst_bytestream_peek_bytes (bs, (guint8**)&guid, sizeof(GstASFGuid));
if (got_bytes < sizeof (GstASFGuid)) {
guint32 remaining;
GstEvent *event;
gst_bytestream_get_status (bs, &remaining, &event);
gst_event_unref (event);
return FALSE;
}
*obj_id = gst_asf_demux_identify_guid (asf_demux, asf_object_guids, guid);
gst_bytestream_flush (bs, sizeof (GstASFGuid));
if (*obj_id == ASF_OBJ_UNDEFINED) {
GST_INFO (GST_CAT_PLUGIN_INFO, "Object found with unknown GUID %08x %08x %08x %08x", guid->v1, guid->v2, guid->v3, guid->v4);
gst_element_error (GST_ELEMENT (asf_demux), "Could not identify object");
return FALSE;
}
/* Now get the object size */
got_bytes = gst_bytestream_peek_bytes (bs, (guint8**)&size, sizeof (guint64));
while (got_bytes < sizeof (guint64)) {
guint32 remaining;
GstEvent *event;
gst_bytestream_get_status (bs, &remaining, &event);
gst_event_unref (event);
got_bytes = gst_bytestream_peek_bytes (bs, (guint8**)&size, sizeof (guint64));
}
*obj_size = GUINT64_FROM_LE (*size);
gst_bytestream_flush (bs, sizeof (guint64));
return TRUE;
}
static guint32 gst_asf_demux_read_var_length (GstASFDemux *asf_demux, guint8 type, guint32 *rsize)
{
guint32 got_bytes;
guint32 *var;
guint32 ret = 0;
GstByteStream *bs = asf_demux->bs;
if (type == 0) {
return 0;
}
got_bytes = gst_bytestream_peek_bytes (bs, (guint8**)&var, 4);
while (got_bytes < 4) {
guint32 remaining;
GstEvent *event;
gst_bytestream_get_status (bs, &remaining, &event);
gst_event_unref (event);
got_bytes = gst_bytestream_peek_bytes (bs, (guint8**)&var, 4);
}
switch (type) {
case 1:
ret = GUINT32_FROM_LE(*var) & 0xff;
gst_bytestream_flush (bs, 1);
*rsize += 1;
break;
case 2:
ret = GUINT32_FROM_LE(*var) & 0xffff;
gst_bytestream_flush (bs, 2);
*rsize += 2;
break;
case 3:
ret = GUINT32_FROM_LE(*var);
gst_bytestream_flush (bs, 4);
*rsize += 4;
break;
}
return ret;
}
static void gst_asf_demux_read_object_header_rest (GstASFDemux *asf_demux, guint8 **buf, guint32 size) {
guint32 got_bytes;
GstByteStream *bs = asf_demux->bs;
got_bytes = gst_bytestream_peek_bytes (bs, buf, size);
while (got_bytes < size) {
guint32 remaining;
GstEvent *event;
gst_bytestream_get_status (bs, &remaining, &event);
gst_event_unref (event);
got_bytes = gst_bytestream_peek_bytes (bs, buf, size);
}
gst_bytestream_flush (bs, size);
}
static inline gboolean
gst_asf_demux_process_file (GstASFDemux *asf_demux, guint64 *filepos, guint64 *obj_size)
{
asf_obj_file *object;
guint64 packets;
/* Get the rest of the header's header */
gst_asf_demux_read_object_header_rest (asf_demux, (guint8**)&object, 80);
packets = GUINT64_FROM_LE (object->packets_count);
asf_demux->packet_size = GUINT32_FROM_LE (object->max_pktsize);
asf_demux->play_time = (guint32) GUINT64_FROM_LE (object->play_time) / 10;
GST_INFO (GST_CAT_PLUGIN_INFO, "Object is a file with %llu data packets", packets);
return TRUE;
}
static inline gboolean
gst_asf_demux_process_header (GstASFDemux *asf_demux, guint64 *filepos, guint64 *obj_size)
{
guint32 num_objects;
asf_obj_header *object;
guint32 i;
/* Get the rest of the header's header */
gst_asf_demux_read_object_header_rest (asf_demux, (guint8**)&object, 6);
num_objects = GUINT32_FROM_LE (object->num_objects);
GST_INFO (GST_CAT_PLUGIN_INFO, "Object is a header with %u parts", num_objects);
/* Loop through the header's objects, processing those */
for (i = 0; i < num_objects; i++) {
if (!gst_asf_demux_process_object (asf_demux, filepos)) {
return FALSE;
}
}
return TRUE;
}
static inline gboolean
gst_asf_demux_process_segment (GstASFDemux *asf_demux,
asf_packet_info *packet_info)
{
guint8 *byte;
gboolean key_frame;
guint32 replic_size;
guint8 time_delta;
guint32 time_start;
guint32 frag_timestamp;
guint32 frag_size;
guint32 rsize;
asf_segment_info segment_info;
gst_asf_demux_read_object_header_rest (asf_demux, (guint8**)&byte, 1); rsize = 1;
segment_info.stream_number = *byte & 0x7f;
key_frame = (*byte & 0x80) >> 7;
GST_INFO (GST_CAT_PLUGIN_INFO, "Processing segment for stream %u", segment_info.stream_number);
segment_info.sequence = gst_asf_demux_read_var_length (asf_demux, packet_info->seqtype, &rsize);
segment_info.frag_offset = gst_asf_demux_read_var_length (asf_demux, packet_info->fragoffsettype, &rsize);
replic_size = gst_asf_demux_read_var_length (asf_demux, packet_info->replicsizetype, &rsize);
GST_DEBUG (GST_CAT_PLUGIN_INFO, "sequence = %x, frag_offset = %x, replic_size = %x", segment_info.sequence, segment_info.frag_offset, replic_size);
if (replic_size > 1) {
asf_replicated_data *replicated_data_header;
guint8 **replicated_data = NULL;
segment_info.compressed = FALSE;
/* It's uncompressed with replic data*/
if (replic_size < 8) {
gst_element_error (GST_ELEMENT (asf_demux), "The payload has replicated data but the size is less than 8");
return FALSE;
}
gst_asf_demux_read_object_header_rest (asf_demux, (guint8**)&replicated_data_header, 8);
frag_timestamp = replicated_data_header->frag_timestamp;
if (replic_size > 8) {
gst_asf_demux_read_object_header_rest (asf_demux, replicated_data, replic_size - 8);
}
rsize += replic_size;
} else {
if (replic_size == 1) {
/* It's compressed */
segment_info.compressed = TRUE;
gst_asf_demux_read_object_header_rest (asf_demux, (guint8**)&byte, 1); rsize++;
time_delta = *byte;
} else {
segment_info.compressed = FALSE;
}
time_start = segment_info.frag_offset;
segment_info.frag_offset = 0;
frag_timestamp = asf_demux->timestamp;
}
GST_DEBUG (GST_CAT_PLUGIN_INFO, "multiple = %u compressed = %u", packet_info->multiple, segment_info.compressed);
if (packet_info->multiple) {
frag_size = gst_asf_demux_read_var_length (asf_demux, packet_info->segsizetype, &rsize);
} else {
frag_size = packet_info->size_left - rsize;
}
packet_info->size_left -= rsize;
GST_DEBUG (GST_CAT_PLUGIN_INFO, "size left = %u frag size = %u rsize = %u", packet_info->size_left, frag_size, rsize);
if (segment_info.compressed) {
while (frag_size > 0) {
gst_asf_demux_read_object_header_rest (asf_demux, (guint8**)&byte, 1);
packet_info->size_left--;
segment_info.chunk_size = *byte;
if (segment_info.chunk_size > packet_info->size_left) {
gst_element_error (GST_ELEMENT (asf_demux), "Payload chunk overruns packet size.");
return FALSE;
}
gst_asf_demux_process_chunk (asf_demux, packet_info, &segment_info);
frag_size -= segment_info.chunk_size + 1;
}
} else {
segment_info.chunk_size = frag_size;
gst_asf_demux_process_chunk (asf_demux, packet_info, &segment_info);
}
return TRUE;
}
static inline gboolean
gst_asf_demux_process_data (GstASFDemux *asf_demux, guint64 *filepos, guint64 *obj_size)
{
asf_obj_data *object;
asf_obj_data_packet *packet_properties_object;
gboolean correction;
guint64 packets;
guint64 packet;
guint8 *buf;
guint32 sequence;
guint32 packet_length;
guint32 *timestamp;
guint16 *duration;
guint8 segment;
guint8 segments;
guint8 flags;
guint8 property;
asf_packet_info packet_info;
guint32 rsize;
/* Get the rest of the header */
gst_asf_demux_read_object_header_rest (asf_demux, (guint8**)&object, 26);
packets = GUINT64_FROM_LE (object->packets);
GST_INFO (GST_CAT_PLUGIN_INFO, "Object is data with %llu packets", packets);
for (packet = 0; packet < packets; packet++) {
GST_INFO (GST_CAT_PLUGIN_INFO, "Process packet %llu", packet);
gst_asf_demux_read_object_header_rest (asf_demux, (guint8**)&buf, 1); rsize=1;
if (*buf & 0x80) {
asf_obj_data_correction *correction_object;
/* Uses error correction */
correction = TRUE;
GST_DEBUG (GST_CAT_PLUGIN_INFO, "Data has error correction (%x)", *buf);
gst_asf_demux_read_object_header_rest (asf_demux, (guint8**)&correction_object, 2); rsize += 2;
}
/* Read the packet flags */
gst_asf_demux_read_object_header_rest (asf_demux, (guint8**)&packet_properties_object, 2); rsize += 2;
flags = packet_properties_object->flags;
property = packet_properties_object->property;
packet_info.multiple = flags & 0x01;
sequence = gst_asf_demux_read_var_length (asf_demux, (flags >> 1) & 0x03, &rsize);
packet_info.padsize =
gst_asf_demux_read_var_length (asf_demux, (flags >> 3) & 0x03, &rsize);
packet_length =
gst_asf_demux_read_var_length (asf_demux, (flags >> 5) & 0x03, &rsize);
if (packet_length == 0)
packet_length = asf_demux->packet_size;
GST_DEBUG (GST_CAT_PLUGIN_INFO, "Multiple = %u, Sequence = %u, Padsize = %u, Packet length = %u", packet_info.multiple, sequence, packet_info.padsize, packet_length);
/* Read the property flags */
packet_info.replicsizetype = property & 0x03;
packet_info.fragoffsettype = (property >> 2) & 0x03;
packet_info.seqtype = (property >> 4) & 0x03;
gst_asf_demux_read_object_header_rest (asf_demux, (guint8**)&timestamp, 4);
asf_demux->timestamp = *timestamp;
gst_asf_demux_read_object_header_rest (asf_demux, (guint8**)&duration, 2);
rsize += 6;
GST_DEBUG (GST_CAT_PLUGIN_INFO, "Timestamp = %x, Duration = %x", asf_demux->timestamp, *duration);
if (packet_info.multiple) {
/* There are multiple payloads */
gst_asf_demux_read_object_header_rest (asf_demux, (guint8**)&buf, 1);
rsize++;
packet_info.segsizetype = (*buf >> 6) & 0x03;
segments = *buf & 0x3f;
} else {
packet_info.segsizetype = 2;
segments = 1;
}
packet_info.size_left = packet_length - packet_info.padsize - rsize;
GST_DEBUG (GST_CAT_PLUGIN_INFO, "rsize: %u size left: %u", rsize, packet_info.size_left);
for (segment = 0; segment < segments; segment++) {
if (!gst_asf_demux_process_segment (asf_demux, &packet_info))
return FALSE;
}
/* Skip the padding */
if (packet_info.padsize > 0)
gst_bytestream_flush (asf_demux->bs, packet_info.padsize);
GST_DEBUG (GST_CAT_PLUGIN_INFO, "Remaining size left: %u", packet_info.size_left);
if (packet_info.size_left > 0) {
gst_element_error (GST_ELEMENT (asf_demux), "The packet's header indicated a length longer than its contents");
return FALSE;
}
}
return TRUE;
}
static inline gboolean
gst_asf_demux_process_stream (GstASFDemux *asf_demux, guint64 *filepos, guint64 *obj_size)
{
asf_obj_stream *object;
guint32 stream_id;
guint32 correction;
asf_stream_audio *audio_object;
asf_stream_correction *correction_object;
asf_stream_video *video_object;
asf_stream_video_format *video_format_object;
guint16 size;
GstBuffer *buf;
guint32 got_bytes;
GstPad **outpad = NULL;
GstPadTemplate *new_template = NULL;
gchar *name = NULL;
asf_stream_context *stream = NULL;
/* Get the rest of the header's header */
gst_asf_demux_read_object_header_rest (asf_demux, (guint8**)&object, 54);
/* Identify the stream type */
stream_id = gst_asf_demux_identify_guid (asf_demux, asf_stream_guids, &(object->type));
correction = gst_asf_demux_identify_guid (asf_demux, asf_correction_guids, &(object->correction));
switch (stream_id) {
case ASF_STREAM_AUDIO:
gst_asf_demux_read_object_header_rest (asf_demux, (guint8**)&audio_object, 18);
size = GUINT16_FROM_LE (audio_object->size);
name = g_strdup_printf ("audio_%02d", asf_demux->num_audio_streams);
outpad = &asf_demux->audio_pad[asf_demux->num_audio_streams++];
new_template = GST_PAD_TEMPLATE_GET (audio_factory);
GST_INFO (GST_CAT_PLUGIN_INFO, "Object is an audio stream with %u bytes of additional data. Assigned to pad '%s'", size, name);
switch (correction) {
case ASF_CORRECTION_ON:
GST_INFO (GST_CAT_PLUGIN_INFO, "Using error correction");
gst_asf_demux_read_object_header_rest (asf_demux, (guint8**)&correction_object, 8);
break;
case ASF_CORRECTION_OFF:
break;
default:
gst_element_error (GST_ELEMENT (asf_demux), "Audio stream using unknown error correction");
return FALSE;
}
/* Read any additional information */
if (size) {
got_bytes = gst_bytestream_read (asf_demux->bs, &buf, size);
/* There is additional data */
while (got_bytes < size) {
guint32 remaining;
GstEvent *event;
gst_bytestream_get_status (asf_demux->bs, &remaining, &event);
gst_event_unref (event);
got_bytes = gst_bytestream_read (asf_demux->bs, &buf, size);
}
}
break;
case ASF_STREAM_VIDEO:
gst_asf_demux_read_object_header_rest (asf_demux, (guint8**)&video_object, 11);
size = GUINT16_FROM_BE(video_object->size) - 40; /* Byte order gets
* offset by single
* byte */
name = g_strdup_printf ("video_%02d", asf_demux->num_video_streams);
outpad = &asf_demux->video_pad[asf_demux->num_video_streams++];
new_template = GST_PAD_TEMPLATE_GET (video_factory);
/*!!! Set for MJPG too */
GST_INFO (GST_CAT_PLUGIN_INFO, "Object is a video stream with %u bytes of additional data. Assigned to pad '%s'", size, name);
gst_asf_demux_read_object_header_rest (asf_demux, (guint8**)&video_format_object, 40);
/* Read any additional information */
if (size) {
got_bytes = gst_bytestream_read (asf_demux->bs, &buf, size);
/* There is additional data */
while (got_bytes < size) {
guint32 remaining;
GstEvent *event;
gst_bytestream_get_status (asf_demux->bs, &remaining, &event);
gst_event_unref (event);
got_bytes = gst_bytestream_read (asf_demux->bs, &buf, size);
}
}
break;
default:
gst_element_error (GST_ELEMENT (asf_demux), "Object is a stream of unrecognised type");
return FALSE;
}
*outpad = gst_pad_new_from_template (new_template, name);
/* Set up the pad */
gst_pad_try_set_caps (*outpad, gst_pad_get_pad_template_caps (*outpad));
gst_pad_set_formats_function (*outpad, gst_asf_demux_get_src_formats);
gst_pad_set_event_mask_function (*outpad, gst_asf_demux_get_src_event_mask);
gst_pad_set_event_function (*outpad, gst_asf_demux_handle_src_event);
gst_pad_set_query_type_function (*outpad, gst_asf_demux_get_src_query_types);
gst_pad_set_query_function (*outpad, gst_asf_demux_handle_src_query);
/* Initialise the stream context */
stream = &asf_demux->stream[asf_demux->num_streams];
stream->pad = *outpad;
stream->frag_offset = 0;
stream->sequence = 0;
gst_pad_set_element_private (*outpad, stream);
asf_demux->num_streams++;
/* Add the pad to the element */
gst_element_add_pad (GST_ELEMENT (asf_demux), *outpad);
return TRUE;
}
static gboolean
gst_asf_demux_skip_object (GstASFDemux *asf_demux, guint64 *filepos, guint64 *obj_size)
{
GstByteStream *bs = asf_demux->bs;
GST_INFO (GST_CAT_PLUGIN_INFO, "Skipping object...");
gst_bytestream_flush (bs, *obj_size - 24);
return TRUE;
}
static gboolean
gst_asf_demux_process_object (GstASFDemux *asf_demux,
guint64 *filepos) {
guint32 obj_id;
guint64 obj_size;
if (!gst_asf_demux_read_object_header (asf_demux, &obj_id, &obj_size)) {
g_print (" ***** Error reading object at filepos 0x%08llx\n", *filepos);
return FALSE;
}
GST_INFO (GST_CAT_PLUGIN_INFO, "Found object %u with size %llx", obj_id, obj_size);
switch (obj_id) {
case ASF_OBJ_STREAM:
gst_asf_demux_process_stream (asf_demux, filepos, &obj_size);
break;
case ASF_OBJ_DATA:
gst_asf_demux_process_data (asf_demux, filepos, &obj_size);
break;
case ASF_OBJ_FILE:
gst_asf_demux_process_file (asf_demux, filepos, &obj_size);
break;
case ASF_OBJ_HEADER:
gst_asf_demux_process_header (asf_demux, filepos, &obj_size);
break;
case ASF_OBJ_CONCEAL_NONE:
break;
case ASF_OBJ_COMMENT:
gst_asf_demux_skip_object (asf_demux, filepos, &obj_size);
break;
case ASF_OBJ_CODEC_COMMENT:
gst_asf_demux_skip_object (asf_demux, filepos, &obj_size);
break;
case ASF_OBJ_INDEX:
gst_asf_demux_skip_object (asf_demux, filepos, &obj_size);
break;
case ASF_OBJ_HEAD1:
gst_asf_demux_skip_object (asf_demux, filepos, &obj_size);
break;
case ASF_OBJ_HEAD2:
break;
case ASF_OBJ_PADDING:
gst_asf_demux_skip_object (asf_demux, filepos, &obj_size);
break;
default:
gst_element_error (GST_ELEMENT (asf_demux), "Unknown ASF object");
}
return TRUE;
}
static gboolean gst_asf_demux_process_chunk (GstASFDemux *asf_demux,
asf_packet_info *packet_info,
asf_segment_info *segment_info)
{
asf_stream_context *stream;
GstFormat format;
guint64 next_ts;
guint32 got_bytes;
GstByteStream *bs = asf_demux->bs;
if (segment_info->stream_number > asf_demux->num_streams) {
gst_element_error (GST_ELEMENT (asf_demux), "Segment found for stream out of range");
return FALSE;
}
stream = &asf_demux->stream[segment_info->stream_number - 1];
GST_DEBUG (GST_CAT_PLUGIN_INFO, "Processing chunk of size %u", segment_info->chunk_size);
if (stream->frag_offset == 0) {
/* new packet */
stream->sequence = segment_info->sequence;
} else {
if (segment_info->sequence == stream->sequence &&
segment_info->frag_offset == stream->frag_offset) {
/* continuing packet */
} else {
/* cannot continue current packet: free it */
stream->frag_offset = 0;
if (segment_info->frag_offset != 0) {
/* cannot create new packet */
gst_bytestream_flush (bs, segment_info->chunk_size);
packet_info->size_left -= segment_info->chunk_size;
return TRUE;
} else {
/* create new packet */
stream->sequence = segment_info->sequence;
}
}
}
format = GST_FORMAT_TIME;
gst_pad_query (stream->pad, GST_PAD_QUERY_POSITION, &format, &next_ts);
if (GST_PAD_IS_CONNECTED (stream->pad)) {
GstBuffer *buf;
got_bytes = gst_bytestream_peek (bs, &buf, segment_info->chunk_size);
GST_BUFFER_TIMESTAMP (buf) = next_ts;
/*!!! Should handle flush events here? */
gst_pad_push (stream->pad, buf);
}
gst_bytestream_flush (bs, segment_info->chunk_size);
packet_info->size_left -= segment_info->chunk_size;
return TRUE;
}
static gboolean
gst_asf_demux_handle_src_event (GstPad *pad, GstEvent *event)
{
GST_DEBUG (0,"asfdemux: handle_src_event");
return FALSE;
}
static const GstEventMask*
gst_asf_demux_get_src_event_mask (GstPad *pad) {
static const GstEventMask masks[] = {
{ GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_FLAG_KEY_UNIT },
{ 0, }
};
return masks;
}
static const GstFormat*
gst_asf_demux_get_src_formats (GstPad *pad) {
static const GstFormat formats[] = {
GST_FORMAT_TIME,
0
};
return formats;
}
static const GstPadQueryType*
gst_asf_demux_get_src_query_types (GstPad *pad) {
static const GstPadQueryType types[] = {
GST_PAD_QUERY_TOTAL,
GST_PAD_QUERY_POSITION,
0
};
return types;
}
static gboolean
gst_asf_demux_handle_src_query (GstPad *pad,
GstPadQueryType type,
GstFormat *format, gint64 *value)
{
GstASFDemux *asf_demux;
gboolean res = TRUE;
asf_demux = GST_ASF_DEMUX (gst_pad_get_parent (pad));
switch (type) {
case GST_PAD_QUERY_TOTAL:
switch (*format) {
case GST_FORMAT_DEFAULT:
*format = GST_FORMAT_TIME;
/* fall through */
case GST_FORMAT_TIME:
*value = (GST_SECOND / 1000) * asf_demux->play_time;
break;
default:
res = FALSE;
}
break;
case GST_PAD_QUERY_POSITION:
switch (*format) {
case GST_FORMAT_DEFAULT:
*format = GST_FORMAT_TIME;
/* fall through */
case GST_FORMAT_TIME:
*value = (GST_SECOND / 1000) * asf_demux->timestamp;
break;
default:
res = FALSE;
}
default:
res = FALSE;
break;
}
return res;
}
static void
gst_asf_demux_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GstASFDemux *src;
g_return_if_fail (GST_IS_ASF_DEMUX (object));
src = GST_ASF_DEMUX (object);
switch (prop_id) {
default:
break;
}
}
static GstElementStateReturn
gst_asf_demux_change_state (GstElement *element)
{
GstASFDemux *asf_demux = GST_ASF_DEMUX (element);
gint i;
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_READY_TO_PAUSED:
asf_demux->bs = gst_bytestream_new (asf_demux->sinkpad);
break;
case GST_STATE_PAUSED_TO_READY:
gst_bytestream_destroy (asf_demux->bs);
asf_demux->restart = TRUE;
for (i = 0 ; i < GST_ASF_DEMUX_NUM_VIDEO_PADS; i++) {
asf_demux->video_PTS[i] = 0;
}
for (i = 0 ; i < GST_ASF_DEMUX_NUM_AUDIO_PADS;i++) {
asf_demux->audio_PTS[i] = 0;
}
break;
case GST_STATE_READY_TO_NULL:
break;
default:
break;
}
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
}
static guint32
gst_asf_demux_identify_guid (GstASFDemux *asf_demux,
GstASFGuidHash *guids,
GstASFGuid *guid_raw)
{
guint32 i;
GstASFGuid guid;
/* guid_raw is passed in 'as-is' from the file
* so we must convert it's endianess */
guid.v1 = GUINT32_FROM_LE (guid_raw->v1);
guid.v2 = GUINT32_FROM_LE (guid_raw->v2);
guid.v3 = GUINT32_FROM_LE (guid_raw->v3);
guid.v4 = GUINT32_FROM_LE (guid_raw->v4);
i = 0;
while (guids[i].obj_id != ASF_OBJ_UNDEFINED) {
if (guids[i].guid.v1 == guid.v1 &&
guids[i].guid.v2 == guid.v2 &&
guids[i].guid.v3 == guid.v3 &&
guids[i].guid.v4 == guid.v4) {
return guids[i].obj_id;
}
i++;
}
/* The base case if none is found */
return ASF_OBJ_UNDEFINED;
}
static gboolean
plugin_init (GModule *module, GstPlugin *plugin)
{
GstElementFactory *factory;
GstTypeFactory *type;
gint i = 0;
/* this filter needs bytestream */
if (!gst_library_load ("gstbytestream")) {
gst_info("asfdemux: could not load support library: 'gstbytestream'\n");
return FALSE;
}
/* create an elementfactory for the asf_demux element */
factory = gst_element_factory_new ("asfdemux",GST_TYPE_ASF_DEMUX,
&gst_asf_demux_details);
while (asf_type_definitions[i].name) {
type = gst_type_factory_new (&asf_type_definitions[i]);
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (type));
i++;
}
g_return_val_if_fail (factory != NULL, FALSE);
gst_element_factory_set_rank (factory, GST_ELEMENT_RANK_NONE);
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (audio_factory));
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (video_factory));
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (sink_factory));
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"asfdemux",
plugin_init
};
Reference in a new issue View git blame Copy permalink