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gstreamer/gst/videoparsers/gstvc1parse.c

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/*
* Copyright (C) 2011, Hewlett-Packard Development Company, L.P.
* Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>, Collabora Ltd.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation
* version 2.1 of the License.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
/*
* Information about the caps fields:
*
* header-format:
* none: No codec_data and only in-stream headers
*
* asf: codec_data as specified in the ASF specification
* Simple/Main profile: 4 byte sequence header without startcode
* Advanced profile: Sequence header and entrypoint with startcodes
*
* sequence-layer: codec_data as specified in SMPTE 421M Annex L.2
*
*
* stream-format:
* bdu: BDUs with startcodes
*
* bdu-frame: BDUs with startcodes, everything up to and including a frame
* per buffer. This also means everything needed to decode a frame, i.e.
* field and slice BDUs
*
* sequence-layer-bdu: Sequence layer in first buffer, then BDUs with startcodes
*
* sequence-layer-bdu-frame: Sequence layer in first buffer, then only frame
* BDUs with startcodes, i.e. everything up to and including a frame.
*
* sequence-layer-raw-frame: Sequence layer in first buffer, then only frame
* BDUs without startcodes. Only for simple/main profile.
*
* sequence-layer-frame-layer: As specified in SMPTE 421M Annex L, sequence-layer
* first, then BDUs inside frame-layer
*
* asf: As specified in the ASF specification.
* For simple/main profile a single frame BDU without startcodes per buffer
* For advanced profile one or many BDUs with/without startcodes:
* Startcodes required if non-frame BDU or multiple BDUs per buffer
* unless frame BDU followed by field BDU. In that case only second (field)
* startcode required.
*
* frame-layer: As specified in SMPTE 421M Annex L.2
*
*
* If no stream-format is given in the caps we do the following:
*
* 0) If header-format=asf we assume stream-format=asf
* 1) If first buffer starts with sequence header startcode
* we assume stream-format=bdu (or bdu-frame, doesn't matter
* for the input because we're parsing anyway)
* 2) If first buffer starts with sequence layer startcode
* 1) If followed by sequence header or frame startcode
* we assume stream-format=sequence-layer-bdu (or -bdu-frame,
* doesn't matter for the input because we're parsing anyway)
* 2) Otherwise we assume stream-format=sequence-layer-frame-layer
* 3) Otherwise
* 1) If header-format=sequence-layer we assume stream-format=frame-layer
* 2) If header-format=none we error out
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstvc1parse.h"
#include <gst/base/base.h>
#include <gst/pbutils/pbutils.h>
#include <string.h>
GST_DEBUG_CATEGORY (vc1_parse_debug);
#define GST_CAT_DEFAULT vc1_parse_debug
static const struct
{
gchar str[15];
VC1HeaderFormat en;
} header_formats[] = {
{
"none", VC1_HEADER_FORMAT_NONE}, {
"asf", VC1_HEADER_FORMAT_ASF}, {
"sequence-layer", VC1_HEADER_FORMAT_SEQUENCE_LAYER}
};
static const struct
{
gchar str[27];
VC1StreamFormat en;
} stream_formats[] = {
{
"bdu", VC1_STREAM_FORMAT_BDU}, {
"bdu-frame", VC1_STREAM_FORMAT_BDU_FRAME}, {
"sequence-layer-bdu", VC1_STREAM_FORMAT_SEQUENCE_LAYER_BDU}, {
"sequence-layer-bdu-frame", VC1_STREAM_FORMAT_SEQUENCE_LAYER_BDU_FRAME}, {
"sequence-layer-raw-frame", VC1_STREAM_FORMAT_SEQUENCE_LAYER_RAW_FRAME}, {
"sequence-layer-frame-layer", VC1_STREAM_FORMAT_SEQUENCE_LAYER_FRAME_LAYER}, {
"asf", VC1_STREAM_FORMAT_ASF}, {
"frame-layer", VC1_STREAM_FORMAT_FRAME_LAYER}
};
static const gchar *
stream_format_to_string (VC1StreamFormat stream_format)
{
return stream_formats[stream_format].str;
}
static VC1StreamFormat
stream_format_from_string (const gchar * stream_format)
{
gint i;
for (i = 0; i < G_N_ELEMENTS (stream_formats); i++) {
if (strcmp (stream_formats[i].str, stream_format) == 0)
return stream_formats[i].en;
}
return -1;
}
static const gchar *
header_format_to_string (VC1HeaderFormat header_format)
{
return header_formats[header_format].str;
}
static VC1HeaderFormat
header_format_from_string (const gchar * header_format)
{
gint i;
for (i = 0; i < G_N_ELEMENTS (header_formats); i++) {
if (strcmp (header_formats[i].str, header_format) == 0)
return header_formats[i].en;
}
return -1;
}
static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-wmv, wmvversion=(int) 3, "
"format=(string) {WVC1, WMV3}"));
static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-wmv, wmvversion=(int) 3, "
"format=(string) {WVC1, WMV3}, "
"stream-format=(string) {bdu, bdu-frame, sequence-layer-bdu, "
"sequence-layer-bdu-frame, sequence-layer-raw-frame, "
"sequence-layer-frame-layer, asf, frame-layer}, "
"header-format=(string) {none, asf, sequence-layer}"));
#define parent_class gst_vc1_parse_parent_class
G_DEFINE_TYPE (GstVC1Parse, gst_vc1_parse, GST_TYPE_BASE_PARSE);
static void gst_vc1_parse_finalize (GObject * object);
static gboolean gst_vc1_parse_start (GstBaseParse * parse);
static gboolean gst_vc1_parse_stop (GstBaseParse * parse);
static GstFlowReturn gst_vc1_parse_handle_frame (GstBaseParse * parse,
GstBaseParseFrame * frame, gint * skipsize);
static GstFlowReturn gst_vc1_parse_pre_push_frame (GstBaseParse * parse,
GstBaseParseFrame * frame);
static gboolean gst_vc1_parse_set_caps (GstBaseParse * parse, GstCaps * caps);
static GstCaps *gst_vc1_parse_get_sink_caps (GstBaseParse * parse,
GstCaps * filter);
static GstFlowReturn gst_vc1_parse_detect (GstBaseParse * parse,
GstBuffer * buffer);
static void gst_vc1_parse_reset (GstVC1Parse * vc1parse);
static gboolean gst_vc1_parse_handle_seq_layer (GstVC1Parse * vc1parse,
GstBuffer * buf, guint offset, guint size);
static gboolean gst_vc1_parse_handle_seq_hdr (GstVC1Parse * vc1parse,
GstBuffer * buf, guint offset, guint size);
static gboolean gst_vc1_parse_handle_entrypoint (GstVC1Parse * vc1parse,
GstBuffer * buf, guint offset, guint size);
static void gst_vc1_parse_update_stream_format_properties (GstVC1Parse *
vc1parse);
static void
gst_vc1_parse_class_init (GstVC1ParseClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
GstBaseParseClass *parse_class = GST_BASE_PARSE_CLASS (klass);
GST_DEBUG_CATEGORY_INIT (vc1_parse_debug, "vc1parse", 0, "vc1 parser");
gobject_class->finalize = gst_vc1_parse_finalize;
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&srctemplate));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sinktemplate));
gst_element_class_set_static_metadata (element_class, "VC1 parser",
"Codec/Parser/Converter/Video",
"Parses VC1 streams",
"Sebastian Dröge <sebastian.droege@collabora.co.uk>");
parse_class->start = GST_DEBUG_FUNCPTR (gst_vc1_parse_start);
parse_class->stop = GST_DEBUG_FUNCPTR (gst_vc1_parse_stop);
parse_class->handle_frame = GST_DEBUG_FUNCPTR (gst_vc1_parse_handle_frame);
parse_class->pre_push_frame =
GST_DEBUG_FUNCPTR (gst_vc1_parse_pre_push_frame);
parse_class->set_sink_caps = GST_DEBUG_FUNCPTR (gst_vc1_parse_set_caps);
parse_class->get_sink_caps = GST_DEBUG_FUNCPTR (gst_vc1_parse_get_sink_caps);
parse_class->detect = GST_DEBUG_FUNCPTR (gst_vc1_parse_detect);
}
static void
gst_vc1_parse_init (GstVC1Parse * vc1parse)
{
/* Default values for stream-format=raw, i.e.
* raw VC1 frames with startcodes */
gst_base_parse_set_syncable (GST_BASE_PARSE (vc1parse), TRUE);
gst_base_parse_set_has_timing_info (GST_BASE_PARSE (vc1parse), FALSE);
gst_vc1_parse_reset (vc1parse);
GST_PAD_SET_ACCEPT_INTERSECT (GST_BASE_PARSE_SINK_PAD (vc1parse));
}
static void
gst_vc1_parse_finalize (GObject * object)
{
/*GstVC1Parse *vc1parse = GST_VC1_PARSE (object); */
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_vc1_parse_reset (GstVC1Parse * vc1parse)
{
vc1parse->profile = -1;
vc1parse->level = -1;
vc1parse->format = 0;
vc1parse->width = 0;
vc1parse->height = 0;
vc1parse->fps_n = vc1parse->fps_d = 0;
vc1parse->frame_duration = GST_CLOCK_TIME_NONE;
vc1parse->fps_from_caps = FALSE;
vc1parse->par_n = vc1parse->par_d = 0;
vc1parse->par_from_caps = FALSE;
vc1parse->renegotiate = TRUE;
vc1parse->update_caps = TRUE;
vc1parse->input_header_format = VC1_HEADER_FORMAT_NONE;
vc1parse->input_stream_format = VC1_STREAM_FORMAT_BDU;
vc1parse->output_header_format = VC1_HEADER_FORMAT_NONE;
vc1parse->output_stream_format = VC1_STREAM_FORMAT_BDU;
gst_buffer_replace (&vc1parse->seq_layer_buffer, NULL);
gst_buffer_replace (&vc1parse->seq_hdr_buffer, NULL);
gst_buffer_replace (&vc1parse->entrypoint_buffer, NULL);
}
static gboolean
gst_vc1_parse_start (GstBaseParse * parse)
{
GstVC1Parse *vc1parse = GST_VC1_PARSE (parse);
GST_DEBUG_OBJECT (parse, "start");
gst_vc1_parse_reset (vc1parse);
vc1parse->detecting_stream_format = TRUE;
return TRUE;
}
static gboolean
gst_vc1_parse_stop (GstBaseParse * parse)
{
GstVC1Parse *vc1parse = GST_VC1_PARSE (parse);
GST_DEBUG_OBJECT (parse, "stop");
gst_vc1_parse_reset (vc1parse);
return TRUE;
}
static gboolean
gst_vc1_parse_renegotiate (GstVC1Parse * vc1parse)
{
GstCaps *allowed_caps;
/* Negotiate with downstream here */
GST_DEBUG_OBJECT (vc1parse, "Renegotiating");
allowed_caps = gst_pad_get_allowed_caps (GST_BASE_PARSE_SRC_PAD (vc1parse));
if (allowed_caps && !gst_caps_is_empty (allowed_caps)
&& !gst_caps_is_any (allowed_caps)) {
GstStructure *s;
const gchar *stream_format, *header_format;
GST_DEBUG_OBJECT (vc1parse, "Downstream allowed caps: %" GST_PTR_FORMAT,
allowed_caps);
allowed_caps = gst_caps_make_writable (allowed_caps);
allowed_caps = gst_caps_truncate (allowed_caps);
s = gst_caps_get_structure (allowed_caps, 0);
/* If already fixed this does nothing */
gst_structure_fixate_field_string (s, "header-format", "asf");
header_format = gst_structure_get_string (s, "header-format");
if (!header_format) {
vc1parse->output_header_format = vc1parse->input_header_format;
header_format = header_format_to_string (vc1parse->output_header_format);
gst_structure_set (s, "header-format", G_TYPE_STRING, header_format,
NULL);
} else {
vc1parse->output_header_format =
header_format_from_string (header_format);
}
/* If already fixed this does nothing */
gst_structure_fixate_field_string (s, "stream-format", "asf");
stream_format = gst_structure_get_string (s, "stream-format");
if (!stream_format) {
vc1parse->output_stream_format = vc1parse->input_stream_format;
stream_format = stream_format_to_string (vc1parse->output_stream_format);
gst_structure_set (s, "stream-format", G_TYPE_STRING, stream_format,
NULL);
} else {
vc1parse->output_stream_format =
stream_format_from_string (stream_format);
}
} else if (gst_caps_is_empty (allowed_caps)) {
GST_ERROR_OBJECT (vc1parse, "Empty caps");
return FALSE;
} else {
GST_DEBUG_OBJECT (vc1parse, "Using input header/stream format");
vc1parse->output_header_format = vc1parse->input_header_format;
vc1parse->output_stream_format = vc1parse->input_stream_format;
}
if (allowed_caps)
gst_caps_unref (allowed_caps);
vc1parse->renegotiate = FALSE;
vc1parse->update_caps = TRUE;
GST_INFO_OBJECT (vc1parse, "input %s/%s, negotiated %s/%s with downstream",
header_format_to_string (vc1parse->input_header_format),
stream_format_to_string (vc1parse->input_stream_format),
header_format_to_string (vc1parse->output_header_format),
stream_format_to_string (vc1parse->output_stream_format));
return TRUE;
}
static void
remove_fields (GstCaps * caps)
{
guint i, n;
n = gst_caps_get_size (caps);
for (i = 0; i < n; i++) {
GstStructure *s = gst_caps_get_structure (caps, i);
gst_structure_remove_field (s, "stream-format");
gst_structure_remove_field (s, "header-format");
}
}
static GstCaps *
gst_vc1_parse_get_sink_caps (GstBaseParse * parse, GstCaps * filter)
{
GstCaps *peercaps;
GstCaps *templ;
GstCaps *ret;
templ = gst_pad_get_pad_template_caps (GST_BASE_PARSE_SINK_PAD (parse));
if (filter) {
GstCaps *fcopy = gst_caps_copy (filter);
/* Remove the fields we convert */
remove_fields (fcopy);
peercaps = gst_pad_peer_query_caps (GST_BASE_PARSE_SRC_PAD (parse), fcopy);
gst_caps_unref (fcopy);
} else
peercaps = gst_pad_peer_query_caps (GST_BASE_PARSE_SRC_PAD (parse), NULL);
if (peercaps) {
/* Remove the stream-format and header-format fields
* and add the generic ones again by intersecting
* with our template */
peercaps = gst_caps_make_writable (peercaps);
remove_fields (peercaps);
ret = gst_caps_intersect_full (peercaps, templ, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (peercaps);
gst_caps_unref (templ);
} else {
ret = templ;
}
if (filter) {
GstCaps *tmp =
gst_caps_intersect_full (filter, ret, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (ret);
ret = tmp;
}
return ret;
}
static GstFlowReturn
gst_vc1_parse_detect (GstBaseParse * parse, GstBuffer * buffer)
{
GstVC1Parse *vc1parse = GST_VC1_PARSE (parse);
GstMapInfo minfo;
guint8 *data;
gint size;
if (!vc1parse->detecting_stream_format)
return GST_FLOW_OK;
if (!gst_buffer_map (buffer, &minfo, GST_MAP_READ))
return GST_FLOW_ERROR;
data = minfo.data;
size = minfo.size;
#if 0
/* FIXME: disable BDU check for now as BDU parsing needs more work.
*/
while (size >= 4) {
guint32 startcode = GST_READ_UINT32_BE (data);
if ((startcode & 0xffffff00) == 0x00000100) {
GST_DEBUG_OBJECT (vc1parse, "Found BDU startcode");
vc1parse->input_stream_format = VC1_STREAM_FORMAT_BDU_FRAME;
goto detected;
}
data += 4;
size -= 4;
}
#endif
while (size >= 40) {
if (data[3] == 0xc5 && GST_READ_UINT32_BE (data + 4) == 0x00000004 &&
GST_READ_UINT32_BE (data + 20) == 0x0000000c) {
guint32 startcode;
GST_DEBUG_OBJECT (vc1parse, "Found sequence layer");
startcode = GST_READ_UINT32_BE (data + 36);
if ((startcode & 0xffffff00) == 0x00000100) {
GST_DEBUG_OBJECT (vc1parse, "Found BDU startcode after sequence layer");
vc1parse->input_stream_format =
VC1_STREAM_FORMAT_SEQUENCE_LAYER_BDU_FRAME;
goto detected;
} else {
GST_DEBUG_OBJECT (vc1parse,
"Assuming sequence-layer-frame-layer stream format");
vc1parse->input_stream_format =
VC1_STREAM_FORMAT_SEQUENCE_LAYER_FRAME_LAYER;
goto detected;
}
}
data += 4;
size -= 4;
}
if (gst_buffer_get_size (buffer) <= 128) {
GST_DEBUG_OBJECT (vc1parse, "Requesting more data");
gst_buffer_unmap (buffer, &minfo);
return GST_FLOW_NOT_NEGOTIATED;
}
if (GST_BASE_PARSE_DRAINING (vc1parse)) {
GST_ERROR_OBJECT (vc1parse, "Failed to detect or assume a stream format "
"and draining now");
gst_buffer_unmap (buffer, &minfo);
return GST_FLOW_ERROR;
}
/* Otherwise we try some heuristics */
if (vc1parse->input_header_format == VC1_HEADER_FORMAT_ASF) {
GST_DEBUG_OBJECT (vc1parse, "Assuming ASF stream format");
vc1parse->input_stream_format = VC1_STREAM_FORMAT_ASF;
goto detected;
} else if (vc1parse->input_header_format == VC1_HEADER_FORMAT_SEQUENCE_LAYER) {
GST_DEBUG_OBJECT (vc1parse, "Assuming frame-layer stream format");
vc1parse->input_stream_format = VC1_STREAM_FORMAT_FRAME_LAYER;
goto detected;
} else {
GST_ERROR_OBJECT (vc1parse, "Can't detect or assume a stream format");
gst_buffer_unmap (buffer, &minfo);
return GST_FLOW_ERROR;
}
g_assert_not_reached ();
return GST_FLOW_ERROR;
detected:
gst_buffer_unmap (buffer, &minfo);
vc1parse->detecting_stream_format = FALSE;
gst_vc1_parse_update_stream_format_properties (vc1parse);
return GST_FLOW_OK;
}
static gboolean
gst_vc1_parse_update_caps (GstVC1Parse * vc1parse)
{
GstCaps *caps;
GstVC1Profile profile;
const gchar *stream_format, *header_format;
if (gst_pad_has_current_caps (GST_BASE_PARSE_SRC_PAD (vc1parse))
&& !vc1parse->update_caps)
return TRUE;
caps = gst_caps_new_simple ("video/x-wmv", "wmvversion", G_TYPE_INT, 3, NULL);
header_format = header_format_to_string (vc1parse->output_header_format);
stream_format = stream_format_to_string (vc1parse->output_stream_format);
gst_caps_set_simple (caps, "header-format", G_TYPE_STRING, header_format,
"stream-format", G_TYPE_STRING, stream_format, NULL);
/* Must have this here from somewhere */
g_assert (vc1parse->width != 0 && vc1parse->height != 0);
gst_caps_set_simple (caps, "width", G_TYPE_INT, vc1parse->width, "height",
G_TYPE_INT, vc1parse->height, NULL);
if (vc1parse->fps_d != 0) {
gst_caps_set_simple (caps, "framerate", GST_TYPE_FRACTION, vc1parse->fps_n,
vc1parse->fps_d, NULL);
vc1parse->frame_duration = gst_util_uint64_scale (GST_SECOND,
vc1parse->fps_d, vc1parse->fps_n);
}
if (vc1parse->par_n != 0 && vc1parse->par_d != 0)
gst_caps_set_simple (caps, "pixel-aspect-ratio", GST_TYPE_FRACTION,
vc1parse->par_n, vc1parse->par_d, NULL);
if (vc1parse->seq_hdr_buffer)
profile = vc1parse->seq_hdr.profile;
else if (vc1parse->seq_layer_buffer)
profile = vc1parse->seq_layer.struct_c.profile;
else
g_assert_not_reached ();
if (profile == GST_VC1_PROFILE_ADVANCED) {
const gchar *level;
/* Caller must make sure this is valid here */
g_assert (vc1parse->seq_hdr_buffer);
switch ((GstVC1Level) vc1parse->seq_hdr.advanced.level) {
case GST_VC1_LEVEL_L0:
level = "0";
break;
case GST_VC1_LEVEL_L1:
level = "1";
break;
case GST_VC1_LEVEL_L2:
level = "2";
break;
case GST_VC1_LEVEL_L3:
level = "3";
break;
case GST_VC1_LEVEL_L4:
level = "4";
break;
default:
g_assert_not_reached ();
break;
}
gst_caps_set_simple (caps, "format", G_TYPE_STRING, "WVC1",
"profile", G_TYPE_STRING, "advanced",
"level", G_TYPE_STRING, level, NULL);
} else if (profile == GST_VC1_PROFILE_SIMPLE
|| profile == GST_VC1_PROFILE_MAIN) {
const gchar *profile_str;
if (profile == GST_VC1_PROFILE_SIMPLE)
profile_str = "simple";
else
profile_str = "main";
gst_caps_set_simple (caps, "format", G_TYPE_STRING, "WMV3",
"profile", G_TYPE_STRING, profile_str, NULL);
if (vc1parse->seq_layer_buffer) {
const gchar *level;
switch (vc1parse->seq_layer.struct_b.level) {
case GST_VC1_LEVEL_LOW:
level = "low";
break;
case GST_VC1_LEVEL_MEDIUM:
level = "medium";
break;
case GST_VC1_LEVEL_HIGH:
level = "high";
break;
default:
g_assert_not_reached ();
break;
}
gst_caps_set_simple (caps, "level", G_TYPE_STRING, level, NULL);
}
} else {
g_assert_not_reached ();
}
switch (vc1parse->output_header_format) {
case VC1_HEADER_FORMAT_ASF:
if (vc1parse->profile != GST_VC1_PROFILE_ADVANCED) {
GstBuffer *codec_data;
if (vc1parse->seq_hdr_buffer) {
codec_data =
gst_buffer_copy_region (vc1parse->seq_hdr_buffer,
GST_BUFFER_COPY_ALL, 0, 4);
} else {
GstMapInfo minfo;
guint32 seq_hdr = 0;
/* Build simple/main sequence header from sequence layer */
seq_hdr |= (vc1parse->profile << 30);
seq_hdr |= (vc1parse->seq_layer.struct_c.wmvp << 28);
seq_hdr |= (vc1parse->seq_layer.struct_c.frmrtq_postproc << 25);
seq_hdr |= (vc1parse->seq_layer.struct_c.bitrtq_postproc << 20);
seq_hdr |= (vc1parse->seq_layer.struct_c.loop_filter << 19);
seq_hdr |= (vc1parse->seq_layer.struct_c.multires << 17);
seq_hdr |= (vc1parse->seq_layer.struct_c.fastuvmc << 15);
seq_hdr |= (vc1parse->seq_layer.struct_c.extended_mv << 14);
seq_hdr |= (vc1parse->seq_layer.struct_c.dquant << 12);
seq_hdr |= (vc1parse->seq_layer.struct_c.vstransform << 11);
seq_hdr |= (vc1parse->seq_layer.struct_c.overlap << 9);
seq_hdr |= (vc1parse->seq_layer.struct_c.syncmarker << 8);
seq_hdr |= (vc1parse->seq_layer.struct_c.rangered << 7);
seq_hdr |= (vc1parse->seq_layer.struct_c.maxbframes << 4);
seq_hdr |= (vc1parse->seq_layer.struct_c.quantizer << 2);
seq_hdr |= (vc1parse->seq_layer.struct_c.finterpflag << 1);
codec_data = gst_buffer_new_and_alloc (4);
gst_buffer_map (codec_data, &minfo, GST_MAP_WRITE);
GST_WRITE_UINT32_BE (minfo.data, seq_hdr);
gst_buffer_unmap (codec_data, &minfo);
}
gst_caps_set_simple (caps, "codec_data", GST_TYPE_BUFFER, codec_data,
NULL);
gst_buffer_unref (codec_data);
} else {
GstBuffer *codec_data;
GstMapInfo minfo, sminfo, eminfo;
/* Should have seqhdr and entrypoint for the advanced profile here */
g_assert (vc1parse->seq_hdr_buffer && vc1parse->entrypoint_buffer);
codec_data =
gst_buffer_new_and_alloc (1 + 4 +
gst_buffer_get_size (vc1parse->seq_hdr_buffer) + 4 +
gst_buffer_get_size (vc1parse->entrypoint_buffer));
gst_buffer_map (codec_data, &minfo, GST_MAP_WRITE);
gst_buffer_map (vc1parse->seq_hdr_buffer, &sminfo, GST_MAP_READ);
gst_buffer_map (vc1parse->entrypoint_buffer, &eminfo, GST_MAP_READ);
if (vc1parse->profile == GST_VC1_PROFILE_SIMPLE)
GST_WRITE_UINT8 (minfo.data, 0x29);
else
GST_WRITE_UINT8 (minfo.data, 0x2b);
GST_WRITE_UINT32_BE (minfo.data + 1, 0x0000010f);
memcpy (minfo.data + 1 + 4, sminfo.data, sminfo.size);
GST_WRITE_UINT32_BE (minfo.data + 1 + 4 +
gst_buffer_get_size (vc1parse->seq_hdr_buffer), 0x0000010e);
memcpy (minfo.data + 1 + 4 + sminfo.size + 4, eminfo.data, eminfo.size);
gst_buffer_unmap (codec_data, &minfo);
gst_buffer_unmap (vc1parse->seq_hdr_buffer, &sminfo);
gst_buffer_unmap (vc1parse->entrypoint_buffer, &eminfo);
gst_caps_set_simple (caps, "codec_data", GST_TYPE_BUFFER, codec_data,
NULL);
gst_buffer_unref (codec_data);
}
break;
case VC1_HEADER_FORMAT_SEQUENCE_LAYER:
if (vc1parse->seq_layer_buffer) {
gst_caps_set_simple (caps, "codec_data", GST_TYPE_BUFFER,
vc1parse->seq_layer_buffer, NULL);
} else {
GstBuffer *codec_data = gst_buffer_new_and_alloc (36);
guint8 *data;
guint32 structC = 0;
GstMapInfo minfo;
gst_buffer_map (codec_data, &minfo, GST_MAP_WRITE);
data = minfo.data;
/* Unknown number of frames and start code */
data[0] = 0xff;
data[1] = 0xff;
data[2] = 0xff;
data[3] = 0xc5;
/* structC */
structC |= (vc1parse->profile << 30);
if (vc1parse->profile != GST_VC1_PROFILE_ADVANCED) {
structC |= (vc1parse->seq_layer.struct_c.wmvp << 28);
structC |= (vc1parse->seq_layer.struct_c.frmrtq_postproc << 25);
structC |= (vc1parse->seq_layer.struct_c.bitrtq_postproc << 20);
structC |= (vc1parse->seq_layer.struct_c.loop_filter << 19);
structC |= (vc1parse->seq_layer.struct_c.multires << 17);
structC |= (vc1parse->seq_layer.struct_c.fastuvmc << 15);
structC |= (vc1parse->seq_layer.struct_c.extended_mv << 14);
structC |= (vc1parse->seq_layer.struct_c.dquant << 12);
structC |= (vc1parse->seq_layer.struct_c.vstransform << 11);
structC |= (vc1parse->seq_layer.struct_c.overlap << 9);
structC |= (vc1parse->seq_layer.struct_c.syncmarker << 8);
structC |= (vc1parse->seq_layer.struct_c.rangered << 7);
structC |= (vc1parse->seq_layer.struct_c.maxbframes << 4);
structC |= (vc1parse->seq_layer.struct_c.quantizer << 2);
structC |= (vc1parse->seq_layer.struct_c.finterpflag << 1);
}
GST_WRITE_UINT32_BE (data + 4, structC);
/* 0x00000004 */
GST_WRITE_UINT32_BE (data + 8, 4);
/* structA */
if (vc1parse->profile != GST_VC1_PROFILE_ADVANCED) {
GST_WRITE_UINT32_BE (data + 12, vc1parse->height);
GST_WRITE_UINT32_BE (data + 16, vc1parse->width);
} else {
GST_WRITE_UINT32_BE (data + 12, 0);
GST_WRITE_UINT32_BE (data + 16, 0);
}
/* 0x0000000c */
GST_WRITE_UINT32_BE (data + 20, 0x0000000c);
/* structB */
if ((gint) vc1parse->level != -1)
data[24] = (vc1parse->level << 5);
else
data[24] = 0x40; /* Use HIGH level */
/* Unknown HRD_BUFFER */
GST_WRITE_UINT24_BE (data + 25, 0);
/* Unknown HRD_RATE */
GST_WRITE_UINT32_BE (data + 28, 0);
/* Framerate */
GST_WRITE_UINT32_BE (data + 32,
((guint32) (((gdouble) vc1parse->fps_n) /
((gdouble) vc1parse->fps_d) + 0.5)));
gst_buffer_unmap (codec_data, &minfo);
gst_caps_set_simple (caps, "codec_data", GST_TYPE_BUFFER, codec_data,
NULL);
gst_buffer_unref (codec_data);
}
break;
case VC1_HEADER_FORMAT_NONE:
default:
/* Nothing here */
break;
}
GST_DEBUG_OBJECT (vc1parse, "Setting caps %" GST_PTR_FORMAT, caps);
gst_pad_set_caps (GST_BASE_PARSE_SRC_PAD (vc1parse), caps);
gst_caps_unref (caps);
vc1parse->update_caps = FALSE;
return TRUE;
}
static gboolean
gst_vc1_parse_handle_bdu (GstVC1Parse * vc1parse, GstVC1StartCode startcode,
GstBuffer * buffer, guint offset, guint size)
{
GST_DEBUG_OBJECT (vc1parse, "Handling BDU with startcode 0x%02x", startcode);
switch (startcode) {
case GST_VC1_SEQUENCE:{
GST_DEBUG_OBJECT (vc1parse, "Have new SequenceHeader header");
if (!gst_vc1_parse_handle_seq_hdr (vc1parse, buffer, offset, size)) {
GST_ERROR_OBJECT (vc1parse, "Invalid VC1 sequence header");
return FALSE;
}
break;
}
case GST_VC1_ENTRYPOINT:
GST_DEBUG_OBJECT (vc1parse, "Have new EntryPoint header");
if (!gst_vc1_parse_handle_entrypoint (vc1parse, buffer, offset, size)) {
GST_ERROR_OBJECT (vc1parse, "Invalid VC1 entrypoint");
return FALSE;
}
break;
case GST_VC1_FRAME:
/* TODO: Check if keyframe */
break;
default:
break;
}
return TRUE;
}
static gboolean
gst_vc1_parse_handle_bdus (GstVC1Parse * vc1parse, GstBuffer * buffer,
guint offset, guint size)
{
GstVC1BDU bdu;
GstVC1ParserResult pres;
guint8 *data;
GstMapInfo minfo;
gst_buffer_map (buffer, &minfo, GST_MAP_READ);
data = minfo.data + offset;
do {
memset (&bdu, 0, sizeof (bdu));
pres = gst_vc1_identify_next_bdu (data, size, &bdu);
if (pres == GST_VC1_PARSER_OK || pres == GST_VC1_PARSER_NO_BDU_END) {
if (pres == GST_VC1_PARSER_NO_BDU_END) {
pres = GST_VC1_PARSER_OK;
bdu.size = size - bdu.offset;
}
data += bdu.offset;
size -= bdu.offset;
if (!gst_vc1_parse_handle_bdu (vc1parse, bdu.type, buffer,
data - minfo.data, bdu.size)) {
gst_buffer_unmap (buffer, &minfo);
return FALSE;
}
data += bdu.size;
size -= bdu.size;
}
} while (pres == GST_VC1_PARSER_OK && size > 0);
gst_buffer_unmap (buffer, &minfo);
if (pres != GST_VC1_PARSER_OK) {
GST_DEBUG_OBJECT (vc1parse, "Failed to parse BDUs");
return FALSE;
}
return TRUE;
}
static GstFlowReturn
gst_vc1_parse_handle_frame (GstBaseParse * parse, GstBaseParseFrame * frame,
gint * skipsize)
{
GstVC1Parse *vc1parse = GST_VC1_PARSE (parse);
GstBuffer *buffer = frame->buffer;
guint8 *data;
gsize size;
gsize framesize = -1;
GstFlowReturn ret = GST_FLOW_OK;
GstMapInfo minfo;
memset (&minfo, 0, sizeof (minfo));
*skipsize = 0;
if (vc1parse->renegotiate
|| gst_pad_check_reconfigure (GST_BASE_PARSE_SRC_PAD (parse))) {
if (!gst_vc1_parse_renegotiate (vc1parse)) {
GST_ERROR_OBJECT (vc1parse, "Failed to negotiate with downstream");
ret = GST_FLOW_NOT_NEGOTIATED;
goto done;
}
}
if (!gst_buffer_map (buffer, &minfo, GST_MAP_READ)) {
GST_ERROR_OBJECT (vc1parse, "Failed to map buffer");
ret = GST_FLOW_ERROR;
goto done;
}
data = minfo.data;
size = minfo.size;
/* First check if we have a valid, complete frame here */
if (!vc1parse->seq_layer_buffer
&& (vc1parse->input_stream_format == VC1_STREAM_FORMAT_SEQUENCE_LAYER_BDU
|| vc1parse->input_stream_format ==
VC1_STREAM_FORMAT_SEQUENCE_LAYER_BDU_FRAME
|| vc1parse->input_stream_format ==
VC1_STREAM_FORMAT_SEQUENCE_LAYER_RAW_FRAME
|| vc1parse->input_stream_format ==
VC1_STREAM_FORMAT_SEQUENCE_LAYER_FRAME_LAYER)) {
if (data[3] == 0xc5 && GST_READ_UINT32_BE (data + 4) == 0x00000004
&& GST_READ_UINT32_BE (data + 20) == 0x0000000c) {
framesize = 36;
} else {
*skipsize = 1;
}
} else if (vc1parse->input_stream_format == VC1_STREAM_FORMAT_BDU ||
vc1parse->input_stream_format == VC1_STREAM_FORMAT_BDU_FRAME ||
(vc1parse->seq_layer_buffer
&& (vc1parse->input_stream_format ==
VC1_STREAM_FORMAT_SEQUENCE_LAYER_BDU
|| vc1parse->input_stream_format ==
VC1_STREAM_FORMAT_SEQUENCE_LAYER_BDU_FRAME))) {
GstVC1ParserResult pres;
GstVC1BDU bdu;
g_assert (size >= 4);
memset (&bdu, 0, sizeof (bdu));
GST_DEBUG_OBJECT (vc1parse,
"Handling buffer of size %" G_GSIZE_FORMAT " at offset %"
G_GUINT64_FORMAT, size, GST_BUFFER_OFFSET (buffer));
/* XXX: when a buffer contains multiple BDUs, does the first one start with
* a startcode?
*/
pres = gst_vc1_identify_next_bdu (data, size, &bdu);
switch (pres) {
case GST_VC1_PARSER_OK:
GST_DEBUG_OBJECT (vc1parse, "Have complete BDU");
if (bdu.sc_offset > 4) {
*skipsize = bdu.sc_offset;
} else {
framesize = bdu.offset + bdu.size;
}
break;
case GST_VC1_PARSER_BROKEN_DATA:
GST_ERROR_OBJECT (vc1parse, "Broken data");
*skipsize = 1;
break;
case GST_VC1_PARSER_NO_BDU:
GST_DEBUG_OBJECT (vc1parse, "Found no BDU startcode");
*skipsize = size - 3;
break;
case GST_VC1_PARSER_NO_BDU_END:
GST_DEBUG_OBJECT (vc1parse, "Found no BDU end");
if (G_UNLIKELY (GST_BASE_PARSE_DRAINING (vc1parse))) {
GST_DEBUG_OBJECT (vc1parse, "Draining - assuming complete frame");
framesize = size;
} else {
/* Need more data */
*skipsize = 0;
}
break;
case GST_VC1_PARSER_ERROR:
GST_ERROR_OBJECT (vc1parse, "Parsing error");
break;
default:
g_assert_not_reached ();
break;
}
} else if (vc1parse->input_stream_format == VC1_STREAM_FORMAT_ASF ||
(vc1parse->seq_layer_buffer
&& vc1parse->input_stream_format ==
VC1_STREAM_FORMAT_SEQUENCE_LAYER_RAW_FRAME)) {
/* Must be packetized already */
framesize = size;
} else {
/* frame-layer or sequence-layer-frame-layer */
g_assert (size >= 8);
/* Parse frame layer size */
framesize = GST_READ_UINT24_BE (data + 1) + 8;
}
if (framesize == -1) {
GST_DEBUG_OBJECT (vc1parse, "Not a complete frame, skipping %d", *skipsize);
ret = GST_FLOW_OK;
goto done;
}
g_assert (*skipsize == 0);
/* We have a complete frame at this point */
if (!vc1parse->seq_layer_buffer
&& (vc1parse->input_stream_format == VC1_STREAM_FORMAT_SEQUENCE_LAYER_BDU
|| vc1parse->input_stream_format ==
VC1_STREAM_FORMAT_SEQUENCE_LAYER_BDU_FRAME
|| vc1parse->input_stream_format ==
VC1_STREAM_FORMAT_SEQUENCE_LAYER_RAW_FRAME
|| vc1parse->input_stream_format ==
VC1_STREAM_FORMAT_SEQUENCE_LAYER_FRAME_LAYER)) {
g_assert (size >= 36);
if (!gst_vc1_parse_handle_seq_layer (vc1parse, buffer, 0, size)) {
GST_ERROR_OBJECT (vc1parse, "Invalid sequence layer");
ret = GST_FLOW_ERROR;
goto done;
}
frame->flags |= GST_BASE_PARSE_FRAME_FLAG_NO_FRAME;
if (vc1parse->input_stream_format == VC1_STREAM_FORMAT_SEQUENCE_LAYER_BDU
|| vc1parse->input_stream_format ==
VC1_STREAM_FORMAT_SEQUENCE_LAYER_BDU_FRAME) {
gst_base_parse_set_min_frame_size (GST_BASE_PARSE (vc1parse), 4);
} else if (vc1parse->input_stream_format ==
VC1_STREAM_FORMAT_SEQUENCE_LAYER_RAW_FRAME) {
gst_base_parse_set_min_frame_size (GST_BASE_PARSE (vc1parse), 1);
} else {
/* frame-layer */
gst_base_parse_set_min_frame_size (GST_BASE_PARSE (vc1parse), 8);
}
ret = GST_FLOW_OK;
} else if (vc1parse->input_stream_format == VC1_STREAM_FORMAT_BDU ||
vc1parse->input_stream_format == VC1_STREAM_FORMAT_BDU_FRAME ||
(vc1parse->seq_layer_buffer
&& (vc1parse->input_stream_format ==
VC1_STREAM_FORMAT_SEQUENCE_LAYER_BDU
|| vc1parse->input_stream_format ==
VC1_STREAM_FORMAT_SEQUENCE_LAYER_BDU_FRAME))) {
GstVC1StartCode startcode;
/* Is already a complete BDU, should have at least the startcode */
g_assert (size >= 4);
startcode = data[3];
if (startcode != GST_VC1_SEQUENCE) {
if (!vc1parse->seq_hdr_buffer && !vc1parse->seq_layer_buffer) {
GST_ERROR_OBJECT (vc1parse,
"Need sequence header/layer before anything else");
ret = GST_FLOW_ERROR;
goto done;
}
} else if (startcode != GST_VC1_ENTRYPOINT
&& vc1parse->profile == GST_VC1_PROFILE_ADVANCED) {
if (vc1parse->seq_hdr_buffer && !vc1parse->entrypoint_buffer) {
GST_ERROR_OBJECT (vc1parse,
"Need entrypoint header after the sequence header for the "
"advanced profile");
ret = GST_FLOW_ERROR;
goto done;
}
}
if (!gst_vc1_parse_handle_bdu (vc1parse, startcode, buffer, 4, size - 4)) {
ret = GST_FLOW_ERROR;
goto done;
}
ret = GST_FLOW_OK;
} else if (vc1parse->input_stream_format == VC1_STREAM_FORMAT_ASF ||
(vc1parse->seq_layer_buffer
&& vc1parse->input_stream_format ==
VC1_STREAM_FORMAT_SEQUENCE_LAYER_RAW_FRAME)) {
GST_LOG_OBJECT (vc1parse, "Have new ASF or RAW data unit");
if (!vc1parse->seq_hdr_buffer && !vc1parse->seq_layer_buffer) {
GST_ERROR_OBJECT (vc1parse, "Need a sequence header or sequence layer");
ret = GST_FLOW_ERROR;
goto done;
}
if (GST_CLOCK_TIME_IS_VALID (vc1parse->frame_duration))
GST_BUFFER_DURATION (buffer) = vc1parse->frame_duration;
/* Might be multiple BDUs here, complex... */
if (vc1parse->profile == GST_VC1_PROFILE_ADVANCED) {
gboolean startcodes = FALSE;
if (size >= 4) {
guint32 startcode = GST_READ_UINT32_BE (data + 4);
startcodes = ((startcode & 0xffffff00) == 0x00000100);
}
if (startcodes) {
if (!gst_vc1_parse_handle_bdus (vc1parse, buffer, 0, size)) {
ret = GST_FLOW_ERROR;
goto done;
}
/* For the advanced profile we need a sequence header here */
if (!vc1parse->seq_hdr_buffer) {
GST_ERROR_OBJECT (vc1parse, "Need sequence header");
ret = GST_FLOW_ERROR;
goto done;
}
} else {
/* Must be a frame or a frame + field */
/* TODO: Check if keyframe */
}
}
ret = GST_FLOW_OK;
} else {
GstVC1ParserResult pres;
GstVC1FrameLayer flayer;
gboolean startcodes = FALSE;
/* frame-layer or sequence-layer-frame-layer */
/* Check if the frame-layer data contains BDUs with startcodes.
* Startcodes are not allowed in raw WMV9/VC1 streams
*/
if (size >= 8 + 4) {
guint32 startcode = GST_READ_UINT32_BE (data + 8);
startcodes = ((startcode & 0xffffff00) == 0x00000100);
}
/* We either need a sequence layer or sequence header here
* or this has to be an advanced profile stream.
*
* For the advanced profile the frame-layer data contains
* BDUs with startcodes and includes the sequence header
*/
if (!vc1parse->seq_layer_buffer && !vc1parse->seq_hdr_buffer && !startcodes) {
GST_ERROR_OBJECT (vc1parse, "Need a sequence header or sequence layer");
ret = GST_FLOW_ERROR;
goto done;
}
if ((vc1parse->seq_layer_buffer || vc1parse->seq_hdr_buffer)
&& vc1parse->profile == GST_VC1_PROFILE_ADVANCED && !startcodes) {
GST_ERROR_OBJECT (vc1parse,
"Advanced profile frame-layer data must start with startcodes");
ret = GST_FLOW_ERROR;
goto done;
}
memset (&flayer, 0, sizeof (flayer));
pres = gst_vc1_parse_frame_layer (data, size, &flayer);
if (pres != GST_VC1_PARSER_OK) {
GST_ERROR_OBJECT (vc1parse, "Invalid VC1 frame layer");
ret = GST_FLOW_ERROR;
goto done;
}
GST_BUFFER_TIMESTAMP (buffer) =
gst_util_uint64_scale (flayer.timestamp, GST_MSECOND, 1);
if (!flayer.key)
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
else
GST_BUFFER_FLAG_UNSET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
/* For the simple/main profile this contains a single frame BDU without
* startcodes and for the advanced profile this contains BDUs with
* startcodes. In the case of the advanced profile parse them.
*
* Also for wrongly muxed simple/main profile streams with startcodes
* we do the same.
*/
if (startcodes) {
/* skip frame layer header */
if (!gst_vc1_parse_handle_bdus (vc1parse, buffer, 8, size - 8)) {
ret = GST_FLOW_ERROR;
goto done;
}
/* For the advanced profile we need a sequence header here */
if (!vc1parse->seq_hdr_buffer) {
GST_ERROR_OBJECT (vc1parse, "Need sequence header");
ret = GST_FLOW_ERROR;
goto done;
}
}
ret = GST_FLOW_OK;
}
/* Need sequence header or sequence layer here, above code
* checks this already */
g_assert (vc1parse->seq_layer_buffer || vc1parse->seq_hdr_buffer);
/* We need the entrypoint BDU for the advanced profile before we can set
* the caps. For the ASF header format it will already be in the codec_data,
* for the frame-layer stream format it will be in the first frame already.
*
* The only case where we wait another frame is the raw stream format, where
* it will be the second BDU
*/
if (vc1parse->profile == GST_VC1_PROFILE_ADVANCED
&& !vc1parse->entrypoint_buffer) {
if (vc1parse->input_stream_format == VC1_STREAM_FORMAT_BDU
|| vc1parse->input_stream_format == VC1_STREAM_FORMAT_BDU_FRAME
|| vc1parse->input_stream_format == VC1_STREAM_FORMAT_SEQUENCE_LAYER_BDU
|| vc1parse->input_stream_format ==
VC1_STREAM_FORMAT_SEQUENCE_LAYER_BDU_FRAME) {
frame->flags |= GST_BASE_PARSE_FRAME_FLAG_QUEUE;
ret = GST_FLOW_OK;
} else {
GST_ERROR_OBJECT (vc1parse, "Need entrypoint for the advanced profile");
ret = GST_FLOW_ERROR;
goto done;
}
}
if (!gst_vc1_parse_update_caps (vc1parse)) {
ret = GST_FLOW_NOT_NEGOTIATED;
goto done;
}
gst_buffer_unmap (buffer, &minfo);
memset (&minfo, 0, sizeof (minfo));
GST_DEBUG_OBJECT (vc1parse, "Finishing frame of size %" G_GSIZE_FORMAT,
framesize);
ret = gst_base_parse_finish_frame (parse, frame, framesize);
done:
if (minfo.data)
gst_buffer_unmap (buffer, &minfo);
return ret;
}
static GstFlowReturn
gst_vc1_parse_pre_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
{
GstVC1Parse *vc1parse = GST_VC1_PARSE (parse);
if (!vc1parse->sent_codec_tag) {
GstTagList *taglist;
GstCaps *caps;
taglist = gst_tag_list_new_empty ();
/* codec tag */
caps = gst_pad_get_current_caps (GST_BASE_PARSE_SRC_PAD (parse));
gst_pb_utils_add_codec_description_to_tag_list (taglist,
GST_TAG_VIDEO_CODEC, caps);
gst_caps_unref (caps);
gst_pad_push_event (GST_BASE_PARSE_SRC_PAD (vc1parse),
gst_event_new_tag (taglist));
/* also signals the end of first-frame processing */
vc1parse->sent_codec_tag = TRUE;
}
if (vc1parse->input_header_format != vc1parse->output_header_format ||
vc1parse->input_stream_format != vc1parse->output_stream_format) {
GST_WARNING_OBJECT (vc1parse, "stream conversion not implemented yet");
return GST_FLOW_ERROR;
}
return GST_FLOW_OK;
}
/* SMPTE 421M Table 7 */
static const struct
{
gint par_n, par_d;
} aspect_ratios[] = {
{
0, 0}, {
1, 1}, {
12, 11}, {
10, 11}, {
16, 11}, {
40, 33}, {
24, 11}, {
20, 11}, {
32, 11}, {
80, 33}, {
18, 11}, {
15, 11}, {
64, 33}, {
160, 99}, {
0, 0}, {
0, 0}
};
/* SMPTE 421M Table 8 */
static const guint framerates_n[] = {
0,
24 * 1000,
25 * 1000, 30 * 1000, 50 * 1000, 60 * 1000, 48 * 1000, 72 * 1000
};
/* SMPTE 421M Table 9 */
static const guint framerates_d[] = {
0,
1000,
1001
};
static gboolean
gst_vc1_parse_handle_seq_hdr (GstVC1Parse * vc1parse,
GstBuffer * buf, guint offset, guint size)
{
GstVC1ParserResult pres;
GstVC1Profile profile;
GstMapInfo minfo;
g_assert (gst_buffer_get_size (buf) >= offset + size);
gst_buffer_replace (&vc1parse->seq_hdr_buffer, NULL);
memset (&vc1parse->seq_hdr, 0, sizeof (vc1parse->seq_hdr));
gst_buffer_map (buf, &minfo, GST_MAP_READ);
pres =
gst_vc1_parse_sequence_header (minfo.data + offset,
size, &vc1parse->seq_hdr);
gst_buffer_unmap (buf, &minfo);
if (pres != GST_VC1_PARSER_OK) {
GST_ERROR_OBJECT (vc1parse, "Invalid VC1 sequence header");
return FALSE;
}
vc1parse->seq_hdr_buffer =
gst_buffer_copy_region (buf, GST_BUFFER_COPY_ALL, offset, size);
profile = vc1parse->seq_hdr.profile;
if (vc1parse->profile != profile) {
vc1parse->update_caps = TRUE;
vc1parse->profile = vc1parse->seq_hdr.profile;
}
/* Only update fps if not from caps */
if (!vc1parse->fps_from_caps && profile != GST_VC1_PROFILE_ADVANCED) {
gint fps;
/* This is only an estimate but better than nothing */
fps = vc1parse->seq_hdr.struct_c.framerate;
if (fps != 0 && (vc1parse->fps_d == 0 ||
gst_util_fraction_compare (fps, 1, vc1parse->fps_n,
vc1parse->fps_d) != 0)) {
vc1parse->update_caps = TRUE;
vc1parse->fps_n = fps;
vc1parse->fps_d = 1;
}
}
if (profile == GST_VC1_PROFILE_ADVANCED) {
GstVC1Level level;
gint width, height;
level = vc1parse->seq_hdr.advanced.level;
if (vc1parse->level != level) {
vc1parse->update_caps = TRUE;
vc1parse->level = level;
}
width = vc1parse->seq_hdr.advanced.max_coded_width;
height = vc1parse->seq_hdr.advanced.max_coded_height;
if (vc1parse->width != width || vc1parse->height != height) {
vc1parse->update_caps = TRUE;
vc1parse->width = width;
vc1parse->height = height;
}
/* Only update fps if not from caps */
if (!vc1parse->fps_from_caps) {
gint fps;
/* This is only an estimate but better than nothing */
fps = vc1parse->seq_hdr.advanced.framerate;
if (fps != 0 && (vc1parse->fps_d == 0 ||
gst_util_fraction_compare (fps, 1, vc1parse->fps_n,
vc1parse->fps_d) != 0)) {
vc1parse->update_caps = TRUE;
vc1parse->fps_n = fps;
vc1parse->fps_d = 1;
}
}
if (vc1parse->seq_hdr.advanced.display_ext) {
/* Only update PAR if not from input caps */
if (!vc1parse->par_from_caps
&& vc1parse->seq_hdr.advanced.aspect_ratio_flag) {
gint par_n, par_d;
if (vc1parse->seq_hdr.advanced.aspect_ratio == 15) {
par_n = vc1parse->seq_hdr.advanced.aspect_horiz_size;
par_d = vc1parse->seq_hdr.advanced.aspect_vert_size;
} else {
par_n = aspect_ratios[vc1parse->seq_hdr.advanced.aspect_ratio].par_n;
par_d = aspect_ratios[vc1parse->seq_hdr.advanced.aspect_ratio].par_d;
}
if (par_n != 0 && par_d != 0 &&
(vc1parse->par_d == 0
|| gst_util_fraction_compare (par_n, par_d,
vc1parse->par_n, vc1parse->par_d) != 0)) {
vc1parse->update_caps = TRUE;
vc1parse->par_n = par_n;
vc1parse->par_d = par_d;
}
}
/* Only update fps if not from caps, better value than above */
if (!vc1parse->fps_from_caps && vc1parse->seq_hdr.advanced.framerate_flag) {
gint fps_n = 0, fps_d = 0;
if (!vc1parse->seq_hdr.advanced.framerateind) {
if (vc1parse->seq_hdr.advanced.frameratenr > 0
&& vc1parse->seq_hdr.advanced.frameratenr < 8
&& vc1parse->seq_hdr.advanced.frameratedr > 0
&& vc1parse->seq_hdr.advanced.frameratedr < 3) {
fps_n = framerates_n[vc1parse->seq_hdr.advanced.frameratenr];
fps_d = framerates_d[vc1parse->seq_hdr.advanced.frameratedr];
}
} else {
fps_n = vc1parse->seq_hdr.advanced.framerateexp + 1;
fps_d = 32;
}
if (fps_n != 0 && fps_d != 0 &&
(vc1parse->fps_d == 0
|| gst_util_fraction_compare (fps_n, fps_d,
vc1parse->fps_n, vc1parse->fps_d) != 0)) {
vc1parse->update_caps = TRUE;
vc1parse->fps_n = fps_n;
vc1parse->fps_d = fps_d;
}
}
}
}
return TRUE;
}
static gboolean
gst_vc1_parse_handle_seq_layer (GstVC1Parse * vc1parse,
GstBuffer * buf, guint offset, guint size)
{
GstVC1ParserResult pres;
GstVC1Profile profile;
GstVC1Level level;
gint width, height;
GstMapInfo minfo;
g_assert (gst_buffer_get_size (buf) >= offset + size);
gst_buffer_replace (&vc1parse->seq_layer_buffer, NULL);
memset (&vc1parse->seq_layer, 0, sizeof (vc1parse->seq_layer));
gst_buffer_map (buf, &minfo, GST_MAP_READ);
pres =
gst_vc1_parse_sequence_layer (minfo.data + offset,
size, &vc1parse->seq_layer);
gst_buffer_unmap (buf, &minfo);
if (pres != GST_VC1_PARSER_OK) {
GST_ERROR_OBJECT (vc1parse, "Invalid VC1 sequence layer");
return FALSE;
}
vc1parse->seq_layer_buffer =
gst_buffer_copy_region (buf, GST_BUFFER_COPY_ALL, offset, size);
profile = vc1parse->seq_layer.struct_c.profile;
if (vc1parse->profile != profile) {
vc1parse->update_caps = TRUE;
vc1parse->profile = vc1parse->seq_layer.struct_c.profile;
}
width = vc1parse->seq_layer.struct_a.vert_size;
height = vc1parse->seq_layer.struct_a.horiz_size;
if (width > 0 && height > 0
&& (vc1parse->width != width || vc1parse->height != height)) {
vc1parse->update_caps = TRUE;
vc1parse->width = width;
vc1parse->height = height;
}
level = vc1parse->seq_layer.struct_b.level;
if (vc1parse->level != level) {
vc1parse->update_caps = TRUE;
vc1parse->level = level;
}
if (!vc1parse->fps_from_caps && profile != GST_VC1_PROFILE_ADVANCED) {
gint fps;
fps = vc1parse->seq_layer.struct_c.framerate;
if (fps == 0 || fps == -1)
fps = vc1parse->seq_layer.struct_b.framerate;
if (fps != 0 && fps != -1 && (vc1parse->fps_d == 0 ||
gst_util_fraction_compare (fps, 1, vc1parse->fps_n,
vc1parse->fps_d) != 0)) {
vc1parse->update_caps = TRUE;
vc1parse->fps_n = fps;
vc1parse->fps_d = 1;
}
}
/* And now update the duration */
if (vc1parse->seq_layer.numframes != 0 && vc1parse->seq_layer.numframes != -1)
gst_base_parse_set_duration (GST_BASE_PARSE (vc1parse),
GST_FORMAT_DEFAULT, vc1parse->seq_layer.numframes, 50);
return TRUE;
}
static gboolean
gst_vc1_parse_handle_entrypoint (GstVC1Parse * vc1parse,
GstBuffer * buf, guint offset, guint size)
{
g_assert (gst_buffer_get_size (buf) >= offset + size);
gst_buffer_replace (&vc1parse->entrypoint_buffer, NULL);
vc1parse->entrypoint_buffer =
gst_buffer_copy_region (buf, GST_BUFFER_COPY_ALL, offset, size);
return TRUE;
}
static void
gst_vc1_parse_update_stream_format_properties (GstVC1Parse * vc1parse)
{
if (vc1parse->input_stream_format == VC1_STREAM_FORMAT_BDU
|| vc1parse->input_stream_format == VC1_STREAM_FORMAT_BDU_FRAME) {
/* Need at least the 4 bytes start code */
gst_base_parse_set_min_frame_size (GST_BASE_PARSE (vc1parse), 4);
gst_base_parse_set_syncable (GST_BASE_PARSE (vc1parse), TRUE);
} else
if (vc1parse->input_stream_format ==
VC1_STREAM_FORMAT_SEQUENCE_LAYER_BDU
|| vc1parse->input_stream_format ==
VC1_STREAM_FORMAT_SEQUENCE_LAYER_BDU_FRAME) {
/* Need at least the 36 bytes sequence layer */
gst_base_parse_set_min_frame_size (GST_BASE_PARSE (vc1parse), 36);
gst_base_parse_set_syncable (GST_BASE_PARSE (vc1parse), TRUE);
} else
if (vc1parse->input_stream_format ==
VC1_STREAM_FORMAT_SEQUENCE_LAYER_RAW_FRAME
|| vc1parse->input_stream_format ==
VC1_STREAM_FORMAT_SEQUENCE_LAYER_FRAME_LAYER) {
/* Need at least the 36 bytes sequence layer */
gst_base_parse_set_min_frame_size (GST_BASE_PARSE (vc1parse), 36);
gst_base_parse_set_syncable (GST_BASE_PARSE (vc1parse), FALSE);
} else if (vc1parse->input_stream_format == VC1_STREAM_FORMAT_ASF) {
vc1parse->input_stream_format = VC1_STREAM_FORMAT_ASF;
/* Need something, assume this is already packetized */
gst_base_parse_set_min_frame_size (GST_BASE_PARSE (vc1parse), 1);
gst_base_parse_set_syncable (GST_BASE_PARSE (vc1parse), FALSE);
} else if (vc1parse->input_stream_format == VC1_STREAM_FORMAT_FRAME_LAYER) {
/* Need at least the frame layer header */
gst_base_parse_set_min_frame_size (GST_BASE_PARSE (vc1parse), 8);
gst_base_parse_set_syncable (GST_BASE_PARSE (vc1parse), FALSE);
} else {
g_assert_not_reached ();
}
}
static gboolean
gst_vc1_parse_set_caps (GstBaseParse * parse, GstCaps * caps)
{
GstVC1Parse *vc1parse = GST_VC1_PARSE (parse);
GstStructure *s;
const GValue *value;
GstBuffer *codec_data = NULL;
const gchar *stream_format = NULL;
const gchar *header_format = NULL;
const gchar *profile = NULL;
const gchar *format;
GST_DEBUG_OBJECT (parse, "caps %" GST_PTR_FORMAT, caps);
/* Parse the caps to get as much information as possible */
s = gst_caps_get_structure (caps, 0);
vc1parse->width = 0;
gst_structure_get_int (s, "width", &vc1parse->width);
vc1parse->height = 0;
gst_structure_get_int (s, "height", &vc1parse->height);
vc1parse->fps_n = vc1parse->fps_d = 0;
vc1parse->fps_from_caps = FALSE;
gst_structure_get_fraction (s, "framerate", &vc1parse->fps_n,
&vc1parse->fps_d);
if (vc1parse->fps_d != 0)
vc1parse->fps_from_caps = TRUE;
gst_structure_get_fraction (s, "pixel-aspect-ratio",
&vc1parse->par_n, &vc1parse->par_d);
if (vc1parse->par_n != 0 && vc1parse->par_d != 0)
vc1parse->par_from_caps = TRUE;
vc1parse->format = 0;
format = gst_structure_get_string (s, "format");
if (format && strcmp (format, "WVC1") == 0)
vc1parse->format = GST_VC1_PARSE_FORMAT_WVC1;
else
vc1parse->format = GST_VC1_PARSE_FORMAT_WMV3;
vc1parse->profile = -1;
profile = gst_structure_get_string (s, "profile");
if (profile && strcmp (profile, "simple"))
vc1parse->profile = GST_VC1_PROFILE_SIMPLE;
else if (profile && strcmp (profile, "main"))
vc1parse->profile = GST_VC1_PROFILE_MAIN;
else if (profile && strcmp (profile, "advanced"))
vc1parse->profile = GST_VC1_PROFILE_ADVANCED;
else if (vc1parse->format == GST_VC1_PARSE_FORMAT_WVC1)
vc1parse->profile = GST_VC1_PROFILE_ADVANCED;
else if (vc1parse->format == GST_VC1_PARSE_FORMAT_WMV3)
vc1parse->profile = GST_VC1_PROFILE_MAIN; /* or SIMPLE */
vc1parse->level = -1;
vc1parse->detecting_stream_format = FALSE;
header_format = gst_structure_get_string (s, "header-format");
stream_format = gst_structure_get_string (s, "stream-format");
/* Now parse the codec_data */
gst_buffer_replace (&vc1parse->seq_layer_buffer, NULL);
gst_buffer_replace (&vc1parse->seq_hdr_buffer, NULL);
gst_buffer_replace (&vc1parse->entrypoint_buffer, NULL);
memset (&vc1parse->seq_layer, 0, sizeof (vc1parse->seq_layer));
memset (&vc1parse->seq_hdr, 0, sizeof (vc1parse->seq_hdr));
value = gst_structure_get_value (s, "codec_data");
if (value != NULL) {
gsize codec_data_size;
GstMapInfo minfo;
codec_data = gst_value_get_buffer (value);
gst_buffer_map (codec_data, &minfo, GST_MAP_READ);
codec_data_size = gst_buffer_get_size (codec_data);
if ((codec_data_size == 4 || codec_data_size == 5)) {
/* ASF, VC1/WMV3 simple/main profile
* This is the sequence header without start codes
*/
if (!gst_vc1_parse_handle_seq_hdr (vc1parse, codec_data,
0, codec_data_size)) {
gst_buffer_unmap (codec_data, &minfo);
return FALSE;
}
if (header_format && strcmp (header_format, "asf") != 0)
GST_WARNING_OBJECT (vc1parse,
"Upstream claimed '%s' header format but 'asf' detected",
header_format);
vc1parse->input_header_format = VC1_HEADER_FORMAT_ASF;
} else if (codec_data_size == 36 && minfo.data[3] == 0xc5) {
/* Sequence Layer, SMPTE S421M-2006 Annex L.3 */
if (!gst_vc1_parse_handle_seq_layer (vc1parse, codec_data, 0,
codec_data_size)) {
GST_ERROR_OBJECT (vc1parse, "Invalid VC1 sequence layer");
gst_buffer_unmap (codec_data, &minfo);
return FALSE;
}
if (header_format && strcmp (header_format, "sequence-layer") != 0)
GST_WARNING_OBJECT (vc1parse,
"Upstream claimed '%s' header format but 'sequence-layer' detected",
header_format);
vc1parse->input_header_format = VC1_HEADER_FORMAT_SEQUENCE_LAYER;
} else {
guint32 start_code;
/* ASF, VC1 advanced profile
* This should be the
* 1) ASF binding byte
* 2) Sequence Header with startcode
* 3) EntryPoint Header with startcode
*/
if (codec_data_size < 1 + 4 + 4 + 4 + 2) {
GST_ERROR_OBJECT (vc1parse,
"Too small for VC1 advanced profile ASF header");
gst_buffer_unmap (codec_data, &minfo);
return FALSE;
}
/* Some sanity checking */
if ((minfo.data[0] & 0x01) != 0x01) {
GST_ERROR_OBJECT (vc1parse,
"Invalid binding byte for VC1 advanced profile ASF header");
gst_buffer_unmap (codec_data, &minfo);
return FALSE;
}
start_code = GST_READ_UINT32_BE (minfo.data + 1);
if (start_code != 0x000010f) {
GST_ERROR_OBJECT (vc1parse,
"VC1 advanced profile ASF header does not start with SequenceHeader startcode");
gst_buffer_unmap (codec_data, &minfo);
return FALSE;
}
if (!gst_vc1_parse_handle_bdus (vc1parse, codec_data, 1,
codec_data_size - 1)) {
gst_buffer_unmap (codec_data, &minfo);
return FALSE;
}
if (!vc1parse->seq_hdr_buffer || !vc1parse->entrypoint_buffer) {
GST_ERROR_OBJECT (vc1parse,
"Need sequence header and entrypoint header in the codec_data");
gst_buffer_unmap (codec_data, &minfo);
return FALSE;
}
if (header_format && strcmp (header_format, "asf") != 0)
GST_WARNING_OBJECT (vc1parse,
"Upstream claimed '%s' header format but 'asf' detected",
header_format);
vc1parse->input_header_format = VC1_HEADER_FORMAT_ASF;
}
gst_buffer_unmap (codec_data, &minfo);
} else {
vc1parse->input_header_format = VC1_HEADER_FORMAT_NONE;
if (header_format && strcmp (header_format, "sequence-layer") != 0)
vc1parse->input_header_format = VC1_HEADER_FORMAT_SEQUENCE_LAYER;
else if (header_format && strcmp (header_format, "none") != 0)
GST_WARNING_OBJECT (vc1parse,
"Upstream claimed '%s' header format but 'none' detected",
header_format);
}
/* If no stream-format was set we try to detect it */
if (!stream_format) {
vc1parse->detecting_stream_format = TRUE;
} else {
vc1parse->input_stream_format = stream_format_from_string (stream_format);
gst_vc1_parse_update_stream_format_properties (vc1parse);
}
vc1parse->renegotiate = TRUE;
vc1parse->update_caps = TRUE;
return TRUE;
}
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