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gstreamer/gst/videoparsers/gstav1parse.c

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/* GStreamer
* Copyright (C) 2020 He Junyan <junyan.he@intel.com>
*
* 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.
*/
/*
* SECTION:element-av1parse
* @title: av1parse
* @short_description: An AV1 stream parse.
*
* The minimal unit should be the BYTE.
* There are four types of AV1 alignment in the AV1 stream.
*
* alignment: byte, obu, frame, tu
*
* 1. Aligned to byte. The basic and default one for input.
* 2. Aligned to obu(Open Bitstream Units).
* 3. Aligned to frame. The default one for output. This ensures that
* each buffer contains only one frame or frame header with the
* show_existing flag for the base or sub layer. It is useful for
* the decoder.
* 4. Aligned to tu(Temporal Unit). A temporal unit consists of all the
* OBUs that are associated with a specific, distinct time instant.
* When scalability is disabled, it contains just exact one showing
* frame(may contain several unshowing frames). When scalability is
* enabled, it contains frames depending on the layer number. It should
* begin with a temporal delimiter obu. It may be useful for mux/demux
* to index the data of some timestamp.
*
* The annex B define a special format for the temporal unit. The size of
* each temporal unit is extract out to the header of the buffer, and no
* size field inside the each obu. There are two stream formats:
*
* stream-format: obu-stream, annexb
*
* 1. obu-stream. The basic and default one.
* 2. annexb. A special stream of temporal unit. It also implies that the
* alignment should be TU.
*
* This AV1 parse implements the conversion between the alignments and the
* stream-formats. If the input and output have the same alignment and the
* same stream-format, it will check and bypass the data.
*
* ## Example launch line to generate annex B format AV1 stream:
* ```
* gst-launch-1.0 filesrc location=sample.av1 ! ivfparse ! av1parse ! \
* video/x-av1,alignment=\(string\)tu,stream-format=\(string\)annexb ! \
* filesink location=matroskamux ! filesink location=trans.mkv
* ```
*
* Since: 1.20
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/base/gstbitreader.h>
#include <gst/base/gstbitwriter.h>
#include <gst/codecparsers/gstav1parser.h>
#include <gst/video/video.h>
#include "gstvideoparserselements.h"
#include "gstav1parse.h"
#include <string.h>
#define GST_AV1_MAX_LEB_128_SIZE 8
GST_DEBUG_CATEGORY (av1_parse_debug);
#define GST_CAT_DEFAULT av1_parse_debug
/* We combine the stream format and the alignment
together. When stream format is annexb, the
alignment must be TU. */
typedef enum
{
GST_AV1_PARSE_ALIGN_ERROR = -1,
GST_AV1_PARSE_ALIGN_NONE = 0,
GST_AV1_PARSE_ALIGN_BYTE,
GST_AV1_PARSE_ALIGN_OBU,
GST_AV1_PARSE_ALIGN_FRAME,
GST_AV1_PARSE_ALIGN_TEMPORAL_UNIT,
GST_AV1_PARSE_ALIGN_TEMPORAL_UNIT_ANNEX_B,
} GstAV1ParseAligment;
struct _GstAV1Parse
{
GstBaseParse parent;
gint width;
gint height;
gint subsampling_x;
gint subsampling_y;
gboolean mono_chrome;
guint8 bit_depth;
gchar *colorimetry;
GstAV1Profile profile;
GstAV1ParseAligment in_align;
GstAV1ParseAligment align;
GstAV1Parser *parser;
GstAdapter *cache_out;
guint last_parsed_offset;
GstAdapter *frame_cache;
guint highest_spatial_id;
gboolean update_caps;
gboolean discont;
gboolean header;
gboolean keyframe;
};
static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-av1"));
static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-av1, parsed = (boolean) true, "
"stream-format=(string) { obu-stream, annexb }, "
"alignment=(string) { obu, tu, frame }"));
#define parent_class gst_av1_parse_parent_class
G_DEFINE_TYPE (GstAV1Parse, gst_av1_parse, GST_TYPE_BASE_PARSE);
GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (av1parse, "av1parse", GST_RANK_SECONDARY,
GST_TYPE_AV1_PARSE, videoparsers_element_init (plugin));
static void
remove_fields (GstCaps * caps, gboolean all)
{
guint i, n;
n = gst_caps_get_size (caps);
for (i = 0; i < n; i++) {
GstStructure *s = gst_caps_get_structure (caps, i);
if (all) {
gst_structure_remove_field (s, "alignment");
gst_structure_remove_field (s, "stream-format");
}
gst_structure_remove_field (s, "parsed");
}
}
static const gchar *
_obu_name (GstAV1OBUType type)
{
switch (type) {
case GST_AV1_OBU_SEQUENCE_HEADER:
return "sequence header";
case GST_AV1_OBU_TEMPORAL_DELIMITER:
return "temporal delimiter";
case GST_AV1_OBU_FRAME_HEADER:
return "frame header";
case GST_AV1_OBU_TILE_GROUP:
return "tile group";
case GST_AV1_OBU_METADATA:
return "metadata";
case GST_AV1_OBU_FRAME:
return "frame";
case GST_AV1_OBU_REDUNDANT_FRAME_HEADER:
return "redundant frame header";
case GST_AV1_OBU_TILE_LIST:
return "tile list";
case GST_AV1_OBU_PADDING:
return "padding";
default:
return "unknown";
}
return NULL;
}
static guint32
_read_leb128 (guint8 * data, GstAV1ParserResult * retval, guint32 * comsumed)
{
guint8 leb128_byte = 0;
guint64 value = 0;
gint i;
gboolean result;
GstBitReader br;
guint32 cur_pos;
gst_bit_reader_init (&br, data, 8);
cur_pos = gst_bit_reader_get_pos (&br);
for (i = 0; i < 8; i++) {
leb128_byte = 0;
result = gst_bit_reader_get_bits_uint8 (&br, &leb128_byte, 8);
if (result == FALSE) {
*retval = GST_AV1_PARSER_BITSTREAM_ERROR;
return 0;
}
value |= (((gint) leb128_byte & 0x7f) << (i * 7));
if (!(leb128_byte & 0x80))
break;
}
*comsumed = (gst_bit_reader_get_pos (&br) - cur_pos) / 8;
/* check for bitstream conformance see chapter4.10.5 */
if (value < G_MAXUINT32) {
*retval = GST_AV1_PARSER_OK;
return (guint32) value;
} else {
GST_WARNING ("invalid leb128");
*retval = GST_AV1_PARSER_BITSTREAM_ERROR;
return 0;
}
}
static gsize
_leb_size_in_bytes (guint64 value)
{
gsize size = 0;
do {
++size;
} while ((value >>= 7) != 0);
return size;
}
static gboolean
_write_leb128 (guint8 * data, guint * len, guint64 value)
{
guint leb_size = _leb_size_in_bytes (value);
guint i;
if (value > G_MAXUINT32 || leb_size > GST_AV1_MAX_LEB_128_SIZE)
return FALSE;
for (i = 0; i < leb_size; ++i) {
guint8 byte = value & 0x7f;
value >>= 7;
/* Signal that more bytes follow. */
if (value != 0)
byte |= 0x80;
*(data + i) = byte;
}
*len = leb_size;
return TRUE;
}
static gboolean gst_av1_parse_start (GstBaseParse * parse);
static gboolean gst_av1_parse_stop (GstBaseParse * parse);
static GstFlowReturn gst_av1_parse_handle_frame (GstBaseParse * parse,
GstBaseParseFrame * frame, gint * skipsize);
static gboolean gst_av1_parse_set_sink_caps (GstBaseParse * parse,
GstCaps * caps);
static GstCaps *gst_av1_parse_get_sink_caps (GstBaseParse * parse,
GstCaps * filter);
static void
gst_av1_parse_reset (GstAV1Parse * self)
{
self->width = 0;
self->height = 0;
self->subsampling_x = -1;
self->subsampling_y = -1;
self->mono_chrome = FALSE;
self->profile = GST_AV1_PROFILE_UNDEFINED;
self->bit_depth = 0;
self->align = GST_AV1_PARSE_ALIGN_NONE;
self->in_align = GST_AV1_PARSE_ALIGN_NONE;
self->discont = TRUE;
self->header = FALSE;
self->keyframe = FALSE;
self->last_parsed_offset = 0;
self->highest_spatial_id = 0;
g_clear_pointer (&self->colorimetry, g_free);
g_clear_pointer (&self->parser, gst_av1_parser_free);
gst_adapter_clear (self->cache_out);
gst_adapter_clear (self->frame_cache);
}
static void
gst_av1_parse_init (GstAV1Parse * self)
{
gst_base_parse_set_pts_interpolation (GST_BASE_PARSE (self), FALSE);
gst_base_parse_set_infer_ts (GST_BASE_PARSE (self), FALSE);
GST_PAD_SET_ACCEPT_INTERSECT (GST_BASE_PARSE_SINK_PAD (self));
GST_PAD_SET_ACCEPT_TEMPLATE (GST_BASE_PARSE_SINK_PAD (self));
self->cache_out = gst_adapter_new ();
self->frame_cache = gst_adapter_new ();
}
static void
gst_av1_parse_finalize (GObject * object)
{
GstAV1Parse *self = GST_AV1_PARSE (object);
gst_av1_parse_reset (self);
g_object_unref (self->cache_out);
g_object_unref (self->frame_cache);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_av1_parse_class_init (GstAV1ParseClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstBaseParseClass *parse_class = GST_BASE_PARSE_CLASS (klass);
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gobject_class->finalize = gst_av1_parse_finalize;
parse_class->start = GST_DEBUG_FUNCPTR (gst_av1_parse_start);
parse_class->stop = GST_DEBUG_FUNCPTR (gst_av1_parse_stop);
parse_class->handle_frame = GST_DEBUG_FUNCPTR (gst_av1_parse_handle_frame);
parse_class->set_sink_caps = GST_DEBUG_FUNCPTR (gst_av1_parse_set_sink_caps);
parse_class->get_sink_caps = GST_DEBUG_FUNCPTR (gst_av1_parse_get_sink_caps);
gst_element_class_add_static_pad_template (element_class, &srctemplate);
gst_element_class_add_static_pad_template (element_class, &sinktemplate);
gst_element_class_set_static_metadata (element_class, "AV1 parser",
"Codec/Parser/Converter/Video",
"Parses AV1 streams", "He Junyan <junyan.he@intel.com>");
GST_DEBUG_CATEGORY_INIT (av1_parse_debug, "av1parse", 0, "av1 parser");
}
static gboolean
gst_av1_parse_start (GstBaseParse * parse)
{
GstAV1Parse *self = GST_AV1_PARSE (parse);
GST_DEBUG_OBJECT (self, "start");
gst_av1_parse_reset (self);
self->parser = gst_av1_parser_new ();
/* At least the OBU header. */
gst_base_parse_set_min_frame_size (parse, 1);
return TRUE;
}
static gboolean
gst_av1_parse_stop (GstBaseParse * parse)
{
GstAV1Parse *self = GST_AV1_PARSE (parse);
GST_DEBUG_OBJECT (self, "stop");
g_clear_pointer (&self->parser, gst_av1_parser_free);
return TRUE;
}
static const gchar *
gst_av1_parse_profile_to_string (GstAV1Profile profile)
{
switch (profile) {
case GST_AV1_PROFILE_0:
return "0";
case GST_AV1_PROFILE_1:
return "1";
case GST_AV1_PROFILE_2:
return "2";
default:
break;
}
return NULL;
}
static GstAV1Profile
gst_av1_parse_profile_from_string (const gchar * profile)
{
if (!profile)
return GST_AV1_PROFILE_UNDEFINED;
if (g_strcmp0 (profile, "0") == 0)
return GST_AV1_PROFILE_0;
else if (g_strcmp0 (profile, "1") == 0)
return GST_AV1_PROFILE_1;
else if (g_strcmp0 (profile, "2") == 0)
return GST_AV1_PROFILE_2;
return GST_AV1_PROFILE_UNDEFINED;
}
static const gchar *
gst_av1_parse_alignment_to_steam_format_string (GstAV1ParseAligment align)
{
switch (align) {
case GST_AV1_PARSE_ALIGN_BYTE:
return "obu-stream";
case GST_AV1_PARSE_ALIGN_OBU:
case GST_AV1_PARSE_ALIGN_TEMPORAL_UNIT:
case GST_AV1_PARSE_ALIGN_FRAME:
return "obu-stream";
case GST_AV1_PARSE_ALIGN_TEMPORAL_UNIT_ANNEX_B:
return "annexb";
default:
GST_WARNING ("Unrecognized steam format");
break;
}
return NULL;
}
static const gchar *
gst_av1_parse_alignment_to_string (GstAV1ParseAligment align)
{
switch (align) {
case GST_AV1_PARSE_ALIGN_BYTE:
return "byte";
case GST_AV1_PARSE_ALIGN_OBU:
return "obu";
case GST_AV1_PARSE_ALIGN_TEMPORAL_UNIT:
case GST_AV1_PARSE_ALIGN_TEMPORAL_UNIT_ANNEX_B:
return "tu";
case GST_AV1_PARSE_ALIGN_FRAME:
return "frame";
default:
GST_WARNING ("Unrecognized alignment");
break;
}
return NULL;
}
static GstAV1ParseAligment
gst_av1_parse_alignment_from_string (const gchar * align,
const gchar * stream_format)
{
if (!align && !stream_format)
return GST_AV1_PARSE_ALIGN_NONE;
if (stream_format) {
if (g_strcmp0 (stream_format, "annexb") == 0) {
if (align && g_strcmp0 (align, "tu") != 0) {
/* annex b stream must align to TU. */
return GST_AV1_PARSE_ALIGN_ERROR;
} else {
return GST_AV1_PARSE_ALIGN_TEMPORAL_UNIT_ANNEX_B;
}
} else if (g_strcmp0 (stream_format, "obu-stream") != 0) {
/* unrecognized */
return GST_AV1_PARSE_ALIGN_NONE;
}
/* stream-format is obu-stream, depends on align */
}
if (align) {
if (g_strcmp0 (align, "byte") == 0) {
return GST_AV1_PARSE_ALIGN_BYTE;
} else if (g_strcmp0 (align, "obu") == 0) {
return GST_AV1_PARSE_ALIGN_OBU;
} else if (g_strcmp0 (align, "tu") == 0) {
return GST_AV1_PARSE_ALIGN_TEMPORAL_UNIT;
} else if (g_strcmp0 (align, "frame") == 0) {
return GST_AV1_PARSE_ALIGN_FRAME;
} else {
/* unrecognized */
return GST_AV1_PARSE_ALIGN_NONE;
}
}
return GST_AV1_PARSE_ALIGN_NONE;
}
static GstAV1ParseAligment
gst_av1_parse_alignment_from_caps (GstCaps * caps)
{
GstAV1ParseAligment align;
align = GST_AV1_PARSE_ALIGN_NONE;
GST_DEBUG ("parsing caps: %" GST_PTR_FORMAT, caps);
if (caps && gst_caps_get_size (caps) > 0) {
GstStructure *s = gst_caps_get_structure (caps, 0);
const gchar *str_align = NULL;
const gchar *str_stream = NULL;
str_align = gst_structure_get_string (s, "alignment");
str_stream = gst_structure_get_string (s, "stream-format");
if (str_align || str_stream)
align = gst_av1_parse_alignment_from_string (str_align, str_stream);
}
return align;
}
static void
gst_av1_parse_update_src_caps (GstAV1Parse * self, GstCaps * caps)
{
GstCaps *sink_caps, *src_caps;
GstCaps *final_caps = NULL;
GstStructure *s = NULL;
gint width, height;
gint par_n = 0, par_d = 0;
gint fps_n = 0, fps_d = 0;
const gchar *profile = NULL;
if (G_UNLIKELY (!gst_pad_has_current_caps (GST_BASE_PARSE_SRC_PAD (self))))
self->update_caps = TRUE;
if (!self->update_caps)
return;
/* if this is being called from the first _setcaps call, caps on the sinkpad
* aren't set yet and so they need to be passed as an argument */
if (caps)
sink_caps = gst_caps_ref (caps);
else
sink_caps = gst_pad_get_current_caps (GST_BASE_PARSE_SINK_PAD (self));
/* carry over input caps as much as possible; override with our own stuff */
if (!sink_caps)
sink_caps = gst_caps_new_empty_simple ("video/x-av1");
else
s = gst_caps_get_structure (sink_caps, 0);
final_caps = gst_caps_copy (sink_caps);
if (s && gst_structure_has_field (s, "width") &&
gst_structure_has_field (s, "height")) {
gst_structure_get_int (s, "width", &width);
gst_structure_get_int (s, "height", &height);
} else {
width = self->width;
height = self->height;
}
if (width > 0 && height > 0)
gst_caps_set_simple (final_caps, "width", G_TYPE_INT, width,
"height", G_TYPE_INT, height, NULL);
if (s && gst_structure_get_fraction (s, "pixel-aspect-ratio", &par_n, &par_d)) {
if (par_n != 0 && par_d != 0) {
gst_caps_set_simple (final_caps, "pixel-aspect-ratio",
GST_TYPE_FRACTION, par_n, par_d, NULL);
}
}
if (s && gst_structure_has_field (s, "framerate")) {
gst_structure_get_fraction (s, "framerate", &fps_n, &fps_d);
}
if (fps_n > 0 && fps_d > 0) {
gst_caps_set_simple (final_caps, "framerate",
GST_TYPE_FRACTION, fps_n, fps_d, NULL);
gst_base_parse_set_frame_rate (GST_BASE_PARSE (self), fps_n, fps_d, 0, 0);
}
/* When not RGB, the chroma format is needed. */
if (self->colorimetry == NULL ||
(g_strcmp0 (self->colorimetry, GST_VIDEO_COLORIMETRY_SRGB) != 0)) {
const gchar *chroma_format = NULL;
if (self->subsampling_x == 1 && self->subsampling_y == 1) {
if (!self->mono_chrome) {
chroma_format = "4:2:0";
} else {
chroma_format = "4:0:0";
}
} else if (self->subsampling_x == 1 && self->subsampling_y == 0) {
chroma_format = "4:2:2";
} else if (self->subsampling_x == 0 && self->subsampling_y == 0) {
chroma_format = "4:4:4";
}
if (chroma_format)
gst_caps_set_simple (final_caps,
"chroma-format", G_TYPE_STRING, chroma_format, NULL);
}
if (self->bit_depth)
gst_caps_set_simple (final_caps,
"bit-depth-luma", G_TYPE_UINT, self->bit_depth,
"bit-depth-chroma", G_TYPE_UINT, self->bit_depth, NULL);
if (self->colorimetry && (!s || !gst_structure_has_field (s, "colorimetry")))
gst_caps_set_simple (final_caps,
"colorimetry", G_TYPE_STRING, self->colorimetry, NULL);
g_assert (self->align > GST_AV1_PARSE_ALIGN_NONE);
gst_caps_set_simple (final_caps, "parsed", G_TYPE_BOOLEAN, TRUE,
"stream-format", G_TYPE_STRING,
gst_av1_parse_alignment_to_steam_format_string (self->align),
"alignment", G_TYPE_STRING,
gst_av1_parse_alignment_to_string (self->align), NULL);
profile = gst_av1_parse_profile_to_string (self->profile);
if (profile)
gst_caps_set_simple (final_caps, "profile", G_TYPE_STRING, profile, NULL);
src_caps = gst_pad_get_current_caps (GST_BASE_PARSE_SRC_PAD (self));
if (!(src_caps && gst_caps_is_strictly_equal (src_caps, final_caps))) {
GST_DEBUG_OBJECT (self, "Update src caps %" GST_PTR_FORMAT, final_caps);
gst_pad_set_caps (GST_BASE_PARSE_SRC_PAD (self), final_caps);
}
gst_clear_caps (&src_caps);
gst_caps_unref (final_caps);
gst_caps_unref (sink_caps);
self->update_caps = FALSE;
}
/* check downstream caps to configure format and alignment */
static void
gst_av1_parse_negotiate (GstAV1Parse * self, GstCaps * in_caps)
{
GstCaps *caps;
GstAV1ParseAligment align = self->align;
caps = gst_pad_get_allowed_caps (GST_BASE_PARSE_SRC_PAD (self));
GST_DEBUG_OBJECT (self, "allowed caps: %" GST_PTR_FORMAT, caps);
/* concentrate on leading structure, since decodebin parser
* capsfilter always includes parser template caps */
if (caps) {
caps = gst_caps_truncate (caps);
GST_DEBUG_OBJECT (self, "negotiating with caps: %" GST_PTR_FORMAT, caps);
}
/* Both upsteam and downstream support, best */
if (in_caps && caps) {
if (gst_caps_can_intersect (in_caps, caps)) {
GST_DEBUG_OBJECT (self, "downstream accepts upstream caps");
align = gst_av1_parse_alignment_from_caps (in_caps);
gst_clear_caps (&caps);
}
}
if (align != GST_AV1_PARSE_ALIGN_NONE)
goto done;
/* Select first one of downstream support */
if (caps && !gst_caps_is_empty (caps)) {
/* fixate to avoid ambiguity with lists when parsing */
caps = gst_caps_fixate (caps);
align = gst_av1_parse_alignment_from_caps (caps);
}
if (align != GST_AV1_PARSE_ALIGN_NONE)
goto done;
/* default */
if (align == GST_AV1_PARSE_ALIGN_NONE)
align = GST_AV1_PARSE_ALIGN_FRAME;
done:
self->align = align;
GST_INFO_OBJECT (self, "selected alignment %s",
gst_av1_parse_alignment_to_string (align));
gst_clear_caps (&caps);
}
static GstCaps *
gst_av1_parse_get_sink_caps (GstBaseParse * parse, GstCaps * filter)
{
GstCaps *peercaps, *templ;
GstCaps *res, *tmp, *pcopy;
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, TRUE);
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);
}
pcopy = gst_caps_copy (peercaps);
remove_fields (pcopy, TRUE);
res = gst_caps_intersect_full (pcopy, templ, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (pcopy);
gst_caps_unref (templ);
if (filter) {
GstCaps *tmp = gst_caps_intersect_full (res, filter,
GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (res);
res = tmp;
}
/* Try if we can put the downstream caps first */
pcopy = gst_caps_copy (peercaps);
remove_fields (pcopy, FALSE);
tmp = gst_caps_intersect_full (pcopy, res, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (pcopy);
if (!gst_caps_is_empty (tmp))
res = gst_caps_merge (tmp, res);
else
gst_caps_unref (tmp);
gst_caps_unref (peercaps);
return res;
}
static gboolean
gst_av1_parse_set_sink_caps (GstBaseParse * parse, GstCaps * caps)
{
GstAV1Parse *self = GST_AV1_PARSE (parse);
GstStructure *str;
GstAV1ParseAligment align;
GstCaps *in_caps = NULL;
const gchar *profile;
str = gst_caps_get_structure (caps, 0);
/* accept upstream info if provided */
gst_structure_get_int (str, "width", &self->width);
gst_structure_get_int (str, "height", &self->height);
profile = gst_structure_get_string (str, "profile");
if (profile)
self->profile = gst_av1_parse_profile_from_string (profile);
/* get upstream align from caps */
align = gst_av1_parse_alignment_from_caps (caps);
if (align == GST_AV1_PARSE_ALIGN_ERROR) {
GST_ERROR_OBJECT (self, "Sink caps %" GST_PTR_FORMAT " set stream-format"
" and alignment conflict.", caps);
return FALSE;
}
in_caps = gst_caps_copy (caps);
/* default */
if (align == GST_AV1_PARSE_ALIGN_NONE)
gst_caps_set_simple (in_caps, "alignment", G_TYPE_STRING,
gst_av1_parse_alignment_to_string (GST_AV1_PARSE_ALIGN_BYTE), NULL);
/* negotiate with downstream, set output align */
gst_av1_parse_negotiate (self, in_caps);
self->update_caps = TRUE;
/* if all of decoder's capability related values are provided
* by upstream, update src caps now */
if (self->width > 0 && self->height > 0 && profile)
gst_av1_parse_update_src_caps (self, in_caps);
gst_caps_unref (in_caps);
self->in_align = align;
if (self->in_align == GST_AV1_PARSE_ALIGN_TEMPORAL_UNIT_ANNEX_B) {
gst_av1_parser_reset (self->parser, TRUE);
} else {
gst_av1_parser_reset (self->parser, FALSE);
}
return TRUE;
}
static GstFlowReturn
gst_av1_parse_push_data (GstAV1Parse * self, GstBaseParseFrame * frame,
guint32 finish_sz, gboolean frame_finished)
{
gsize sz;
GstBuffer *buf;
GstBuffer *buffer = frame->buffer;
GstFlowReturn ret = GST_FLOW_OK;
/* Need to generate the final TU annex-b format */
if (self->align == GST_AV1_PARSE_ALIGN_TEMPORAL_UNIT_ANNEX_B) {
guint8 size_data[GST_AV1_MAX_LEB_128_SIZE];
guint size_len = 0;
guint len;
/* When push a TU, it must also be a frame end. */
g_assert (frame_finished);
/* Still some left in the frame cache */
len = gst_adapter_available (self->frame_cache);
if (len) {
buf = gst_adapter_take_buffer (self->frame_cache, len);
/* frame_unit_size */
_write_leb128 (size_data, &size_len, len);
gst_adapter_push (self->cache_out,
gst_buffer_new_memdup (size_data, size_len));
gst_adapter_push (self->cache_out, buf);
}
len = gst_adapter_available (self->cache_out);
if (len) {
buf = gst_adapter_take_buffer (self->cache_out, len);
/* temporal_unit_size */
_write_leb128 (size_data, &size_len, len);
gst_adapter_push (self->cache_out,
gst_buffer_new_memdup (size_data, size_len));
gst_adapter_push (self->cache_out, buf);
}
}
sz = gst_adapter_available (self->cache_out);
if (sz) {
buf = gst_adapter_take_buffer (self->cache_out, sz);
gst_buffer_copy_into (buf, buffer, GST_BUFFER_COPY_METADATA, 0, -1);
if (self->discont) {
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
self->discont = FALSE;
}
if (self->header) {
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_HEADER);
self->header = FALSE;
}
if (self->keyframe) {
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
self->keyframe = FALSE;
}
if (frame_finished)
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_MARKER);
gst_buffer_replace (&frame->out_buffer, buf);
gst_buffer_unref (buf);
gst_av1_parse_update_src_caps (self, NULL);
GST_LOG_OBJECT (self, "comsumed %d, output one buffer with size %"
G_GSSIZE_FORMAT, finish_sz, sz);
ret = gst_base_parse_finish_frame (GST_BASE_PARSE (self), frame, finish_sz);
}
return ret;
}
static void
gst_av1_parse_convert_to_annexb (GstAV1Parse * self, GstAV1OBU * obu,
gboolean frame_complete)
{
guint8 size_data[GST_AV1_MAX_LEB_128_SIZE];
guint size_len = 0;
GstBitWriter bs;
GstBuffer *buf, *buf2;
guint8 *data;
guint len, len2, offset;
/* obu_length */
_write_leb128 (size_data, &size_len,
obu->obu_size + 1 + obu->header.obu_extention_flag);
gst_bit_writer_init_with_size (&bs, 128, FALSE);
/* obu_forbidden_bit */
gst_bit_writer_put_bits_uint8 (&bs, 0, 1);
/* obu_type */
gst_bit_writer_put_bits_uint8 (&bs, obu->obu_type, 4);
/* obu_extension_flag */
gst_bit_writer_put_bits_uint8 (&bs, obu->header.obu_extention_flag, 1);
/* obu_has_size_field */
gst_bit_writer_put_bits_uint8 (&bs, 0, 1);
/* obu_reserved_1bit */
gst_bit_writer_put_bits_uint8 (&bs, 0, 1);
if (obu->header.obu_extention_flag) {
/* temporal_id */
gst_bit_writer_put_bits_uint8 (&bs, obu->header.obu_temporal_id, 3);
/* spatial_id */
gst_bit_writer_put_bits_uint8 (&bs, obu->header.obu_spatial_id, 2);
/* extension_header_reserved_3bits */
gst_bit_writer_put_bits_uint8 (&bs, 0, 3);
}
g_assert (GST_BIT_WRITER_BIT_SIZE (&bs) % 8 == 0);
len = size_len;
len += GST_BIT_WRITER_BIT_SIZE (&bs) / 8;
len += obu->obu_size;
data = g_malloc (len);
offset = 0;
memcpy (data + offset, size_data, size_len);
offset += size_len;
memcpy (data + offset, GST_BIT_WRITER_DATA (&bs),
GST_BIT_WRITER_BIT_SIZE (&bs) / 8);
offset += GST_BIT_WRITER_BIT_SIZE (&bs) / 8;
memcpy (data + offset, obu->data, obu->obu_size);
/* The buf of this OBU */
buf = gst_buffer_new_wrapped (data, len);
gst_adapter_push (self->frame_cache, buf);
if (frame_complete) {
len2 = gst_adapter_available (self->frame_cache);
buf2 = gst_adapter_take_buffer (self->frame_cache, len2);
/* frame_unit_size */
_write_leb128 (size_data, &size_len, len2);
gst_adapter_push (self->cache_out,
gst_buffer_new_memdup (size_data, size_len));
gst_adapter_push (self->cache_out, buf2);
}
gst_bit_writer_reset (&bs);
}
static void
gst_av1_parse_convert_from_annexb (GstAV1Parse * self, GstAV1OBU * obu)
{
guint8 size_data[GST_AV1_MAX_LEB_128_SIZE];
guint size_len = 0;
GstBuffer *buf;
guint len, offset;
guint8 *data;
GstBitWriter bs;
_write_leb128 (size_data, &size_len, obu->obu_size);
/* obu_header */
len = 1;
if (obu->header.obu_extention_flag)
len += 1;
len += size_len;
len += obu->obu_size;
gst_bit_writer_init_with_size (&bs, 128, FALSE);
/* obu_forbidden_bit */
gst_bit_writer_put_bits_uint8 (&bs, 0, 1);
/* obu_type */
gst_bit_writer_put_bits_uint8 (&bs, obu->obu_type, 4);
/* obu_extension_flag */
gst_bit_writer_put_bits_uint8 (&bs, obu->header.obu_extention_flag, 1);
/* obu_has_size_field */
gst_bit_writer_put_bits_uint8 (&bs, 1, 1);
/* obu_reserved_1bit */
gst_bit_writer_put_bits_uint8 (&bs, 0, 1);
if (obu->header.obu_extention_flag) {
/* temporal_id */
gst_bit_writer_put_bits_uint8 (&bs, obu->header.obu_temporal_id, 3);
/* spatial_id */
gst_bit_writer_put_bits_uint8 (&bs, obu->header.obu_spatial_id, 2);
/* extension_header_reserved_3bits */
gst_bit_writer_put_bits_uint8 (&bs, 0, 3);
}
g_assert (GST_BIT_WRITER_BIT_SIZE (&bs) % 8 == 0);
data = g_malloc (len);
offset = 0;
memcpy (data + offset, GST_BIT_WRITER_DATA (&bs),
GST_BIT_WRITER_BIT_SIZE (&bs) / 8);
offset += GST_BIT_WRITER_BIT_SIZE (&bs) / 8;
memcpy (data + offset, size_data, size_len);
offset += size_len;
memcpy (data + offset, obu->data, obu->obu_size);
buf = gst_buffer_new_wrapped (data, len);
gst_adapter_push (self->cache_out, buf);
gst_bit_writer_reset (&bs);
}
static void
gst_av1_parse_cache_one_obu (GstAV1Parse * self, GstAV1OBU * obu,
guint8 * data, guint32 size, gboolean frame_complete)
{
gboolean need_convert = FALSE;
GstBuffer *buf;
if (self->in_align != self->align
&& (self->in_align == GST_AV1_PARSE_ALIGN_TEMPORAL_UNIT_ANNEX_B
|| self->align == GST_AV1_PARSE_ALIGN_TEMPORAL_UNIT_ANNEX_B))
need_convert = TRUE;
if (need_convert) {
if (self->in_align == GST_AV1_PARSE_ALIGN_TEMPORAL_UNIT_ANNEX_B) {
gst_av1_parse_convert_from_annexb (self, obu);
} else {
gst_av1_parse_convert_to_annexb (self, obu, frame_complete);
}
} else if (self->align == GST_AV1_PARSE_ALIGN_TEMPORAL_UNIT_ANNEX_B) {
g_assert (self->in_align == GST_AV1_PARSE_ALIGN_TEMPORAL_UNIT_ANNEX_B);
gst_av1_parse_convert_to_annexb (self, obu, frame_complete);
} else {
buf = gst_buffer_new_memdup (data, size);
gst_adapter_push (self->cache_out, buf);
}
}
static GstAV1ParserResult
gst_av1_parse_handle_sequence_obu (GstAV1Parse * self, GstAV1OBU * obu)
{
GstAV1SequenceHeaderOBU seq_header;
GstAV1ParserResult res;
guint i;
guint val;
res = gst_av1_parser_parse_sequence_header_obu (self->parser,
obu, &seq_header);
if (res != GST_AV1_PARSER_OK)
return res;
if (self->width != seq_header.max_frame_width_minus_1 + 1) {
self->width = seq_header.max_frame_width_minus_1 + 1;
self->update_caps = TRUE;
}
if (self->height != seq_header.max_frame_height_minus_1 + 1) {
self->height = seq_header.max_frame_height_minus_1 + 1;
self->update_caps = TRUE;
}
if (seq_header.color_config.color_description_present_flag) {
GstVideoColorimetry cinfo;
gboolean have_cinfo = TRUE;
gchar *colorimetry = NULL;
if (have_cinfo) {
if (seq_header.color_config.color_range)
cinfo.range = GST_VIDEO_COLOR_RANGE_16_235;
else
cinfo.range = GST_VIDEO_COLOR_RANGE_0_255;
cinfo.matrix = gst_video_color_matrix_from_iso
(seq_header.color_config.matrix_coefficients);
cinfo.transfer = gst_video_transfer_function_from_iso
(seq_header.color_config.transfer_characteristics);
cinfo.primaries = gst_video_color_primaries_from_iso
(seq_header.color_config.color_primaries);
colorimetry = gst_video_colorimetry_to_string (&cinfo);
}
if (g_strcmp0 (colorimetry, self->colorimetry)) {
g_clear_pointer (&self->colorimetry, g_free);
self->colorimetry = colorimetry;
self->update_caps = TRUE;
}
}
if (self->subsampling_x != seq_header.color_config.subsampling_x) {
self->subsampling_x = seq_header.color_config.subsampling_x;
self->update_caps = TRUE;
}
if (self->subsampling_y != seq_header.color_config.subsampling_y) {
self->subsampling_y = seq_header.color_config.subsampling_y;
self->update_caps = TRUE;
}
if (self->mono_chrome != seq_header.color_config.mono_chrome) {
self->mono_chrome = seq_header.color_config.mono_chrome;
self->update_caps = TRUE;
}
if (self->bit_depth != seq_header.bit_depth) {
self->bit_depth = seq_header.bit_depth;
self->update_caps = TRUE;
}
if (self->profile != seq_header.seq_profile) {
self->profile = seq_header.seq_profile;
self->update_caps = TRUE;
}
val = (self->parser->state.operating_point_idc >> 8) & 0x0f;
for (i = 0; i < (1 << GST_AV1_MAX_SPATIAL_LAYERS); i++) {
if (val & (1 << i))
self->highest_spatial_id = i;
}
return GST_AV1_PARSER_OK;
}
static GstAV1ParserResult
gst_av1_parse_handle_one_obu (GstAV1Parse * self, GstAV1OBU * obu,
gboolean * frame_complete)
{
GstAV1ParserResult res = GST_AV1_PARSER_OK;
GstAV1MetadataOBU metadata;
GstAV1FrameHeaderOBU frame_header;
GstAV1TileListOBU tile_list;
GstAV1TileGroupOBU tile_group;
GstAV1FrameOBU frame;
*frame_complete = FALSE;
switch (obu->obu_type) {
case GST_AV1_OBU_TEMPORAL_DELIMITER:
res = gst_av1_parser_parse_temporal_delimiter_obu (self->parser, obu);
break;
case GST_AV1_OBU_SEQUENCE_HEADER:
res = gst_av1_parse_handle_sequence_obu (self, obu);
break;
case GST_AV1_OBU_REDUNDANT_FRAME_HEADER:
res = gst_av1_parser_parse_frame_header_obu (self->parser, obu,
&frame_header);
break;
case GST_AV1_OBU_FRAME_HEADER:
res = gst_av1_parser_parse_frame_header_obu (self->parser, obu,
&frame_header);
break;
case GST_AV1_OBU_FRAME:
res = gst_av1_parser_parse_frame_obu (self->parser, obu, &frame);
break;
case GST_AV1_OBU_METADATA:
res = gst_av1_parser_parse_metadata_obu (self->parser, obu, &metadata);
break;
case GST_AV1_OBU_TILE_GROUP:
res =
gst_av1_parser_parse_tile_group_obu (self->parser, obu, &tile_group);
break;
case GST_AV1_OBU_TILE_LIST:
res = gst_av1_parser_parse_tile_list_obu (self->parser, obu, &tile_list);
break;
case GST_AV1_OBU_PADDING:
break;
default:
GST_WARNING_OBJECT (self, "an unrecognized obu type %d", obu->obu_type);
res = GST_AV1_PARSER_BITSTREAM_ERROR;
break;
}
GST_LOG_OBJECT (self, "parsing the obu %s, result is %d",
_obu_name (obu->obu_type), res);
if (res != GST_AV1_PARSER_OK)
goto out;
/* 7.5:
All OBU extension headers that are contained in the same temporal
unit and have the same spatial_id value must have the same temporal_id
value.
And
OBUs with spatial level IDs (spatial_id) greater than 0 must
appear within a temporal unit in increasing order of the spatial
level ID values. */
if (obu->header.obu_spatial_id > self->highest_spatial_id) {
GST_WARNING_OBJECT (self,
"spatial_id %d is bigger than highest_spatial_id %d",
obu->header.obu_spatial_id, self->highest_spatial_id);
res = GST_AV1_PARSER_BITSTREAM_ERROR;
goto out;
}
if (obu->obu_type == GST_AV1_OBU_SEQUENCE_HEADER)
self->header = TRUE;
if (obu->obu_type == GST_AV1_OBU_FRAME_HEADER
|| obu->obu_type == GST_AV1_OBU_FRAME
|| obu->obu_type == GST_AV1_OBU_REDUNDANT_FRAME_HEADER) {
GstAV1FrameHeaderOBU *fh = &frame_header;
if (obu->obu_type == GST_AV1_OBU_FRAME)
fh = &frame.frame_header;
/* if a show_existing_frame case, only update key frame.
otherwise, update all type of frame. */
if (!fh->show_existing_frame || fh->frame_type == GST_AV1_KEY_FRAME)
res = gst_av1_parser_reference_frame_update (self->parser, fh);
if (res != GST_AV1_PARSER_OK)
GST_WARNING_OBJECT (self, "update frame get result %d", res);
if (fh->show_existing_frame)
*frame_complete = TRUE;
if (fh->frame_type == GST_AV1_KEY_FRAME)
self->keyframe = TRUE;
}
if (obu->obu_type == GST_AV1_OBU_TILE_GROUP
|| obu->obu_type == GST_AV1_OBU_FRAME) {
GstAV1TileGroupOBU *tg = &tile_group;
if (obu->obu_type == GST_AV1_OBU_FRAME)
tg = &frame.tile_group;
if (tg->tg_end == tg->num_tiles - 1)
*frame_complete = TRUE;
}
out:
if (res != GST_AV1_PARSER_OK) {
/* Some verbose OBU can be skip */
if (obu->obu_type == GST_AV1_OBU_REDUNDANT_FRAME_HEADER) {
GST_WARNING_OBJECT (self, "Ignore a verbose %s OBU parsing error",
_obu_name (obu->obu_type));
res = GST_AV1_PARSER_OK;
}
}
return res;
}
static GstFlowReturn
gst_av1_parse_handle_obu_to_obu (GstBaseParse * parse,
GstBaseParseFrame * frame, gint * skipsize)
{
GstAV1Parse *self = GST_AV1_PARSE (parse);
GstMapInfo map_info;
GstAV1OBU obu;
GstFlowReturn ret = GST_FLOW_OK;
GstAV1ParserResult res;
GstBuffer *buffer = gst_buffer_ref (frame->buffer);
guint32 consumed;
gboolean frame_complete;
if (!gst_buffer_map (buffer, &map_info, GST_MAP_READ)) {
*skipsize = 0;
GST_ERROR_OBJECT (parse, "Couldn't map incoming buffer");
return GST_FLOW_ERROR;
}
consumed = 0;
frame_complete = FALSE;
res = gst_av1_parser_identify_one_obu (self->parser, map_info.data,
map_info.size, &obu, &consumed);
if (res == GST_AV1_PARSER_OK)
res = gst_av1_parse_handle_one_obu (self, &obu, &frame_complete);
g_assert (consumed <= map_info.size);
if (res == GST_AV1_PARSER_BITSTREAM_ERROR) {
if (consumed) {
*skipsize = consumed;
} else {
*skipsize = map_info.size;
}
GST_WARNING_OBJECT (parse, "Parse obu error, discard %d.", *skipsize);
ret = GST_FLOW_OK;
goto out;
} else if (res == GST_AV1_PARSER_NO_MORE_DATA) {
*skipsize = 0;
if (self->in_align == GST_AV1_PARSE_ALIGN_OBU) {
/* The buffer is already aligned to OBU, should not happen. */
if (consumed) {
*skipsize = consumed;
} else {
*skipsize = map_info.size;
}
GST_WARNING_OBJECT (parse, "Parse obu need more data, discard %d.",
*skipsize);
}
ret = GST_FLOW_OK;
goto out;
} else if (res == GST_AV1_PARSER_DROP) {
GST_DEBUG_OBJECT (parse, "Drop %d data", consumed);
*skipsize = consumed;
ret = GST_FLOW_OK;
goto out;
} else if (res != GST_AV1_PARSER_OK) {
GST_ERROR_OBJECT (parse, "Parse obu get unexpect error %d", res);
*skipsize = 0;
ret = GST_FLOW_ERROR;
goto out;
}
g_assert (consumed);
gst_av1_parse_update_src_caps (self, NULL);
if (self->discont) {
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
self->discont = FALSE;
}
if (self->header) {
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_HEADER);
self->header = FALSE;
}
/* happen to be a frame boundary */
if (frame_complete)
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_MARKER);
GST_LOG_OBJECT (self, "Output one buffer with size %d", consumed);
ret = gst_base_parse_finish_frame (parse, frame, consumed);
*skipsize = 0;
out:
gst_buffer_unmap (buffer, &map_info);
gst_buffer_unref (buffer);
return ret;
}
static GstFlowReturn
gst_av1_parse_handle_to_small_and_equal_align (GstBaseParse * parse,
GstBaseParseFrame * frame, gint * skipsize)
{
GstAV1Parse *self = GST_AV1_PARSE (parse);
GstMapInfo map_info;
GstAV1OBU obu;
GstFlowReturn ret = GST_FLOW_OK;
GstAV1ParserResult res;
GstBuffer *buffer = gst_buffer_ref (frame->buffer);
guint32 total_consumed, consumed;
gboolean frame_complete;
if (!gst_buffer_map (buffer, &map_info, GST_MAP_READ)) {
GST_ERROR_OBJECT (parse, "Couldn't map incoming buffer");
return GST_FLOW_ERROR;
}
total_consumed = 0;
frame_complete = FALSE;
again:
while (total_consumed < map_info.size) {
res = gst_av1_parser_identify_one_obu (self->parser,
map_info.data + total_consumed, map_info.size - total_consumed,
&obu, &consumed);
if (res == GST_AV1_PARSER_OK)
res = gst_av1_parse_handle_one_obu (self, &obu, &frame_complete);
if (res != GST_AV1_PARSER_OK)
break;
if (obu.obu_type == GST_AV1_OBU_TEMPORAL_DELIMITER && total_consumed) {
GST_DEBUG_OBJECT (self, "Encounter TD inside one %s aligned"
" buffer, should not happen normally.",
gst_av1_parse_alignment_to_string (self->in_align));
frame_complete = TRUE;
if (self->in_align == GST_AV1_PARSE_ALIGN_TEMPORAL_UNIT_ANNEX_B)
gst_av1_parser_reset_annex_b (self->parser);
/* Not include this TD obu, it should belong to the next TU or frame */
break;
}
gst_av1_parse_cache_one_obu (self, &obu,
map_info.data + total_consumed, consumed, frame_complete);
total_consumed += consumed;
if (self->align == GST_AV1_PARSE_ALIGN_OBU)
break;
if (self->align == GST_AV1_PARSE_ALIGN_FRAME && frame_complete)
break;
}
if (res == GST_AV1_PARSER_BITSTREAM_ERROR) {
/* Discard the whole frame */
*skipsize = map_info.size;
GST_WARNING_OBJECT (parse, "Parse obu error, discard %d", *skipsize);
if (self->in_align == GST_AV1_PARSE_ALIGN_TEMPORAL_UNIT_ANNEX_B)
gst_av1_parser_reset_annex_b (self->parser);
ret = GST_FLOW_OK;
goto out;
} else if (res == GST_AV1_PARSER_NO_MORE_DATA) {
/* Discard the whole buffer */
*skipsize = map_info.size;
GST_WARNING_OBJECT (parse, "Parse obu need more data, discard %d.",
*skipsize);
if (self->in_align == GST_AV1_PARSE_ALIGN_TEMPORAL_UNIT_ANNEX_B)
gst_av1_parser_reset_annex_b (self->parser);
ret = GST_FLOW_OK;
goto out;
} else if (res == GST_AV1_PARSER_DROP) {
GST_DEBUG_OBJECT (parse, "Drop %d data", consumed);
total_consumed += consumed;
res = GST_AV1_PARSER_OK;
goto again;
} else if (res != GST_AV1_PARSER_OK) {
GST_ERROR_OBJECT (parse, "Parse obu get unexpect error %d", res);
*skipsize = 0;
ret = GST_FLOW_ERROR;
goto out;
}
g_assert (total_consumed >= map_info.size || frame_complete
|| self->align == GST_AV1_PARSE_ALIGN_OBU);
if (total_consumed >= map_info.size && !frame_complete
&& self->align == GST_AV1_PARSE_ALIGN_FRAME) {
/* Warning and still consider this frame as complete */
GST_WARNING_OBJECT (self, "Exhaust the buffer but still incomplete frame,"
" should not happend in %s alignment",
gst_av1_parse_alignment_to_string (self->in_align));
}
ret = gst_av1_parse_push_data (self, frame, total_consumed, frame_complete);
out:
gst_buffer_unmap (buffer, &map_info);
gst_buffer_unref (buffer);
return ret;
}
static GstFlowReturn
gst_av1_parse_handle_to_big_align (GstBaseParse * parse,
GstBaseParseFrame * frame, gint * skipsize)
{
GstAV1Parse *self = GST_AV1_PARSE (parse);
GstMapInfo map_info;
GstAV1OBU obu;
GstFlowReturn ret = GST_FLOW_OK;
GstAV1ParserResult res = GST_AV1_PARSER_OK;
GstBuffer *buffer = gst_buffer_ref (frame->buffer);
guint32 consumed;
gboolean frame_complete;
gboolean complete;
g_assert (self->in_align <= GST_AV1_PARSE_ALIGN_FRAME);
if (!gst_buffer_map (buffer, &map_info, GST_MAP_READ)) {
*skipsize = 0;
GST_ERROR_OBJECT (parse, "Couldn't map incoming buffer");
return GST_FLOW_ERROR;
}
complete = FALSE;
again:
while (self->last_parsed_offset < map_info.size) {
res = gst_av1_parser_identify_one_obu (self->parser,
map_info.data + self->last_parsed_offset,
map_info.size - self->last_parsed_offset, &obu, &consumed);
if (res == GST_AV1_PARSER_OK)
res = gst_av1_parse_handle_one_obu (self, &obu, &frame_complete);
if (res != GST_AV1_PARSER_OK)
break;
/* New TD come, always begin a new temporal unit or frame */
if (obu.obu_type == GST_AV1_OBU_TEMPORAL_DELIMITER
&& (gst_adapter_available (self->cache_out) ||
gst_adapter_available (self->frame_cache))) {
complete = TRUE;
break;
}
if (self->align == GST_AV1_PARSE_ALIGN_TEMPORAL_UNIT ||
self->align == GST_AV1_PARSE_ALIGN_FRAME) {
GstBuffer *buf = gst_buffer_copy_region (buffer, GST_BUFFER_COPY_ALL,
self->last_parsed_offset, consumed);
gst_adapter_push (self->cache_out, buf);
} else if (self->align == GST_AV1_PARSE_ALIGN_TEMPORAL_UNIT_ANNEX_B) {
gst_av1_parse_convert_to_annexb (self, &obu, frame_complete);
} else {
g_assert_not_reached ();
}
self->last_parsed_offset += consumed;
if (self->align == GST_AV1_PARSE_ALIGN_FRAME && frame_complete)
complete = TRUE;
if (complete)
break;
}
/* Finish a complete frame anyway */
if (complete || GST_BASE_PARSE_DRAINING (parse)) {
*skipsize = 0;
/* push the left anyway if no error */
if (res == GST_AV1_PARSER_OK)
ret = gst_av1_parse_push_data (self, frame,
self->last_parsed_offset, TRUE);
self->last_parsed_offset = 0;
goto out;
}
if (res == GST_AV1_PARSER_BITSTREAM_ERROR) {
*skipsize = map_info.size;
GST_WARNING_OBJECT (parse, "Parse obu error, discard whole buffer %d.",
*skipsize);
/* The adapter will be cleared in next loop because of
GST_BASE_PARSE_FRAME_FLAG_NEW_FRAME flag */
ret = GST_FLOW_OK;
} else if (res == GST_AV1_PARSER_NO_MORE_DATA) {
*skipsize = 0;
if (self->in_align >= GST_AV1_PARSE_ALIGN_OBU) {
/* The buffer is already aligned to OBU, should not happen.
The adapter will be cleared in next loop because of
GST_BASE_PARSE_FRAME_FLAG_NEW_FRAME flag */
*skipsize = map_info.size;
GST_WARNING_OBJECT (parse,
"Parse obu need more data, discard whole buffer %d.", *skipsize);
}
ret = GST_FLOW_OK;
} else if (res == GST_AV1_PARSER_DROP) {
GST_DEBUG_OBJECT (parse, "Drop %d data", consumed);
self->last_parsed_offset += consumed;
res = GST_AV1_PARSER_OK;
goto again;
} else if (res == GST_AV1_PARSER_OK) {
/* Everything is correct but still not get a frame or tu,
need more data */
GST_DEBUG_OBJECT (parse, "Need more data");
*skipsize = 0;
ret = GST_FLOW_OK;
} else {
GST_ERROR_OBJECT (parse, "Parse obu get unexpect error %d", res);
*skipsize = 0;
ret = GST_FLOW_ERROR;
}
out:
gst_buffer_unmap (buffer, &map_info);
gst_buffer_unref (buffer);
return ret;
}
/* Try to recognize whether the input is annex-b format. */
static GstFlowReturn
gst_av1_parse_detect_alignment (GstBaseParse * parse,
GstBaseParseFrame * frame, gint * skipsize)
{
GstAV1Parse *self = GST_AV1_PARSE (parse);
GstMapInfo map_info;
GstAV1OBU obu;
GstAV1ParserResult res;
GstBuffer *buffer = gst_buffer_ref (frame->buffer);
gboolean got_seq, got_frame;
gboolean frame_complete;
guint32 consumed, total_consumed;
guint32 frame_sz;
GstFlowReturn ret = GST_FLOW_OK;
if (!gst_buffer_map (buffer, &map_info, GST_MAP_READ)) {
*skipsize = 0;
GST_ERROR_OBJECT (parse, "Couldn't map incoming buffer");
return GST_FLOW_ERROR;
}
gst_av1_parser_reset (self->parser, FALSE);
/* Detect the alignment obu first */
got_seq = FALSE;
got_frame = FALSE;
total_consumed = 0;
again:
while (total_consumed < map_info.size) {
res = gst_av1_parser_identify_one_obu (self->parser,
map_info.data + total_consumed, map_info.size - total_consumed,
&obu, &consumed);
if (res == GST_AV1_PARSER_OK)
res = gst_av1_parse_handle_one_obu (self, &obu, &frame_complete);
if (res != GST_AV1_PARSER_OK)
break;
total_consumed += consumed;
if (obu.obu_type == GST_AV1_OBU_SEQUENCE_HEADER)
got_seq = TRUE;
if (obu.obu_type == GST_AV1_OBU_REDUNDANT_FRAME_HEADER ||
obu.obu_type == GST_AV1_OBU_FRAME ||
obu.obu_type == GST_AV1_OBU_FRAME_HEADER)
got_frame = TRUE;
if (got_seq || got_frame)
break;
}
gst_av1_parser_reset (self->parser, FALSE);
if (res == GST_AV1_PARSER_OK || res == GST_AV1_PARSER_NO_MORE_DATA) {
*skipsize = 0;
/* If succeed recognize seq or frame, we can decide,
otherwise, just skipsize to 0 and get more data. */
if (got_seq || got_frame)
self->in_align = GST_AV1_PARSE_ALIGN_BYTE;
ret = GST_FLOW_OK;
goto out;
} else if (res == GST_AV1_PARSER_DROP) {
total_consumed += consumed;
res = GST_AV1_PARSER_OK;
goto again;
}
/* Try the annexb. The buffer should hold the whole frame, and
the buffer start with the frame size in leb128() format. */
if (map_info.size < 8) {
/* Get more data. */
*skipsize = 0;
ret = GST_FLOW_OK;
goto out;
}
frame_sz = _read_leb128 (map_info.data, &res, &consumed);
if (frame_sz == 0 || res != GST_AV1_PARSER_OK) {
/* Both modes does not match, we can decide a error */
ret = GST_FLOW_ERROR;
goto out;
}
if (frame_sz + consumed != map_info.size) {
GST_DEBUG_OBJECT (self, "Buffer size %" G_GSSIZE_FORMAT ", frame size %d,"
" consumed %d, does not match annex b format.",
map_info.size, frame_sz, consumed);
/* Both modes does not match, we can decide a error */
ret = GST_FLOW_ERROR;
goto out;
}
self->in_align = GST_AV1_PARSE_ALIGN_TEMPORAL_UNIT_ANNEX_B;
gst_av1_parser_reset (self->parser, TRUE);
ret = GST_FLOW_OK;
out:
gst_buffer_unmap (buffer, &map_info);
gst_buffer_unref (buffer);
return ret;
}
static GstFlowReturn
gst_av1_parse_handle_frame (GstBaseParse * parse,
GstBaseParseFrame * frame, gint * skipsize)
{
GstAV1Parse *self = GST_AV1_PARSE (parse);
GstFlowReturn ret = GST_FLOW_OK;
guint in_level, out_level;
if (GST_BUFFER_FLAG_IS_SET (frame->buffer, GST_BUFFER_FLAG_DISCONT))
self->discont = TRUE;
else
self->discont = FALSE;
GST_LOG_OBJECT (self, "Input frame size %" G_GSSIZE_FORMAT,
gst_buffer_get_size (frame->buffer));
/* avoid stale cached parsing state */
if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_NEW_FRAME) {
GST_LOG_OBJECT (self, "parsing new frame");
gst_adapter_clear (self->cache_out);
gst_adapter_clear (self->frame_cache);
self->last_parsed_offset = 0;
self->header = FALSE;
self->keyframe = FALSE;
} else {
GST_LOG_OBJECT (self, "resuming frame parsing");
}
/* When in pull mode, the sink pad has no caps, we may get the
caps by query the upstream element */
if (self->in_align == GST_AV1_PARSE_ALIGN_NONE) {
GstCaps *upstream_caps;
upstream_caps =
gst_pad_peer_query_caps (GST_BASE_PARSE_SINK_PAD (self), NULL);
if (upstream_caps) {
if (!gst_caps_is_empty (upstream_caps)
&& !gst_caps_is_any (upstream_caps)) {
GST_LOG_OBJECT (self, "upstream caps: %" GST_PTR_FORMAT, upstream_caps);
/* fixate to avoid ambiguity with lists when parsing */
upstream_caps = gst_caps_fixate (upstream_caps);
self->in_align = gst_av1_parse_alignment_from_caps (upstream_caps);
}
gst_caps_unref (upstream_caps);
gst_av1_parser_reset (self->parser,
self->in_align == GST_AV1_PARSE_ALIGN_TEMPORAL_UNIT_ANNEX_B);
}
if (self->in_align != GST_AV1_PARSE_ALIGN_NONE)
GST_LOG_OBJECT (self, "Query the upstream get the alignment %d",
self->in_align);
}
if (self->in_align == GST_AV1_PARSE_ALIGN_NONE) {
/* Only happend at the first time of handle_frame, and the
alignment in the sink caps is unset. Try the default and
if error, try the annex B. */
ret = gst_av1_parse_detect_alignment (parse, frame, skipsize);
if (ret == GST_FLOW_OK && self->in_align != GST_AV1_PARSE_ALIGN_NONE)
GST_INFO_OBJECT (self, "Detect the input alignment %d", self->in_align);
}
if (self->in_align == GST_AV1_PARSE_ALIGN_NONE) {
GST_ERROR_OBJECT (self, "Input alignment is unknown");
return GST_FLOW_ERROR;
}
/* We may in pull mode and no caps is set */
if (self->align == GST_AV1_PARSE_ALIGN_NONE)
gst_av1_parse_negotiate (self, NULL);
in_level = self->in_align;
if (self->in_align == GST_AV1_PARSE_ALIGN_TEMPORAL_UNIT_ANNEX_B)
in_level = GST_AV1_PARSE_ALIGN_TEMPORAL_UNIT;
out_level = self->align;
if (self->align == GST_AV1_PARSE_ALIGN_TEMPORAL_UNIT_ANNEX_B)
out_level = GST_AV1_PARSE_ALIGN_TEMPORAL_UNIT;
if (self->in_align <= GST_AV1_PARSE_ALIGN_OBU
&& self->align == GST_AV1_PARSE_ALIGN_OBU) {
ret = gst_av1_parse_handle_obu_to_obu (parse, frame, skipsize);
} else if (in_level < out_level) {
ret = gst_av1_parse_handle_to_big_align (parse, frame, skipsize);
} else {
ret = gst_av1_parse_handle_to_small_and_equal_align (parse,
frame, skipsize);
}
return ret;
}
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