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gstreamer/gst-libs/gst/video/video-anc.c
Matthew Waters 98249a57db gst: don't use volatile to mean atomic 
volatile is not sufficient to provide atomic guarantees and real atomics
should be used instead.  GCC 11 has started warning about using volatile
with atomic operations.

https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1719

Discovered in https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/issues/868

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/1073>
2021-03-19 04:20:19 +00:00

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/* GStreamer
* Copyright (C) 2018 Edward Hervey <edward@centricular.com>
* Copyright (C) 2018 Sebastian Dröge <sebastian@centricular.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.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <string.h>
#include <gst/base/gstbytereader.h>
#include "video-anc.h"
/**
* SECTION:gstvideoanc
* @title: GstVideo Ancillary
* @short_description: Utilities for Ancillary data, VBI and Closed Caption
*
* A collection of objects and methods to assist with handling Ancillary Data
* present in Vertical Blanking Interval as well as Closed Caption.
*/
#ifndef GST_DISABLE_GST_DEBUG
#define GST_CAT_DEFAULT ensure_debug_category()
static GstDebugCategory *
ensure_debug_category (void)
{
static gsize cat_gonce = 0;
if (g_once_init_enter (&cat_gonce)) {
gsize cat_done;
cat_done = (gsize) _gst_debug_category_new ("video-anc", 0,
"Ancillary data, VBI and CC utilities");
g_once_init_leave (&cat_gonce, cat_done);
}
return (GstDebugCategory *) cat_gonce;
}
#else
#define ensure_debug_category() /* NOOP */
#endif /* GST_DISABLE_GST_DEBUG */
struct _GstVideoVBIParser
{
GstVideoInfo info; /* format of the lines provided */
guint8 *work_data; /* Converted line in planar 16bit format */
guint32 work_data_size; /* Size in bytes of work_data */
guint offset; /* Current offset (in bytes) in work_data */
gboolean bit16; /* Data is stored as 16bit if TRUE. Else 8bit(without parity) */
};
G_DEFINE_BOXED_TYPE (GstVideoVBIParser, gst_video_vbi_parser,
(GBoxedCopyFunc) gst_video_vbi_parser_copy,
(GBoxedFreeFunc) gst_video_vbi_parser_free);
GstVideoVBIParser *
gst_video_vbi_parser_copy (const GstVideoVBIParser * parser)
{
GstVideoVBIParser *res;
g_return_val_if_fail (parser != NULL, NULL);
res = gst_video_vbi_parser_new (GST_VIDEO_INFO_FORMAT (&parser->info),
parser->info.width);
if (res) {
memcpy (res->work_data, parser->work_data, parser->work_data_size);
}
return res;
}
/* See SMPTE S291 */
static GstVideoVBIParserResult
get_ancillary_16 (GstVideoVBIParser * parser, GstVideoAncillary * anc)
{
gboolean found = FALSE;
const guint16 *data = (const guint16 *) parser->work_data;
g_return_val_if_fail (parser != NULL, GST_VIDEO_VBI_PARSER_RESULT_ERROR);
g_return_val_if_fail (anc != NULL, GST_VIDEO_VBI_PARSER_RESULT_ERROR);
/* 3 words are needed at least to detect what kind of packet we look at
*
* - ADF (SMPTE S291 3.2.1) in case of component ancillary format:
* 0x000 0x3ff 0x3ff (followed by DID, SDID)
* - ADF (SMPTE S291 3.2.2) in case of composite ancillary format:
* 0x3fc DID SDID
*/
while (parser->offset + 3 < parser->work_data_size) {
guint8 DID, SDID, DC;
guint i = 0, j;
guint checksum = 0;
gboolean composite;
/* Look for ADF */
if (data[parser->offset] == 0x3fc) {
/* composite */
i += 1;
composite = TRUE;
} else if (data[parser->offset] == 0x000 &&
data[parser->offset + 1] == 0x3ff &&
data[parser->offset + 2] == 0x3ff) {
/* component */
i += 3;
composite = FALSE;
} else {
parser->offset += 1;
continue;
}
/* TODO: Might want to check parity bits here but the checksum in
* the end should really be enough */
/* 4 words: DID, SDID, DC, [DATA], checksum */
if (parser->offset + i + 4 >= parser->work_data_size)
goto not_enough_data;
/* We have a valid ADF */
DID = data[parser->offset + i] & 0xff;
SDID = data[parser->offset + i + 1] & 0xff;
DC = data[parser->offset + i + 2] & 0xff;
i += 3;
/* Check if we have enough room to get the User Data and checksum */
if (parser->offset + i + DC + 1 >= parser->work_data_size)
goto not_enough_data;
/* We found a valid ANC \o/ */
anc->DID = DID;
anc->SDID_block_number = SDID;
anc->data_count = DC;
memset (anc->data, 0, 256);
/* FIXME: We assume here the same data format for the user data as for the
* DID/SDID: 10 bits with parity in the upper 2 bits. In theory some
* standards could define this differently and even have full 10 bits of
* user data but there does not seem to be a single such standard after
* all these years.
*/
/* i is at the beginning of the user data now */
for (j = 0; j < anc->data_count; j++)
anc->data[j] = data[parser->offset + i + j] & 0xff;
i += DC;
/* Checksum calculation SMPTE S291 3.2.1 */
for (j = (composite ? 1 : 3); j < i; j++)
checksum += data[parser->offset + j] & 0x1ff;
checksum &= 0x1ff;
checksum |= (!(checksum >> 8)) << 9;
if (checksum != (data[parser->offset + i] & 0x3ff)) {
GST_WARNING ("ADF checksum mismatch: expected 0x%03x, got 0x%03x",
checksum, (data[parser->offset + i] & 0x3ff));
parser->offset += 1;
continue;
}
i += 1;
found = TRUE;
parser->offset += i;
break;
}
if (found)
return GST_VIDEO_VBI_PARSER_RESULT_OK;
return GST_VIDEO_VBI_PARSER_RESULT_DONE;
/* ERRORS */
not_enough_data:
{
GST_WARNING ("ANC requires more User Data than available line size");
/* Avoid further calls to go in the same error */
parser->offset = parser->work_data_size;
return GST_VIDEO_VBI_PARSER_RESULT_ERROR;
}
}
/* See SMPTE S291 */
static GstVideoVBIParserResult
get_ancillary_8 (GstVideoVBIParser * parser, GstVideoAncillary * anc)
{
gboolean found = FALSE;
const guint8 *data = parser->work_data;
g_return_val_if_fail (parser != NULL, GST_VIDEO_VBI_PARSER_RESULT_ERROR);
g_return_val_if_fail (anc != NULL, GST_VIDEO_VBI_PARSER_RESULT_ERROR);
/* 3 words are needed at least to detect what kind of packet we look at
*
* - ADF (SMPTE S291 3.2.1) in case of component ancillary format:
* 0x000 0x3ff 0x3ff (followed by DID, SDID)
* - ADF (SMPTE S291 3.2.2) in case of composite ancillary format:
* 0x3fc DID SDID
*/
while (parser->offset + 3 < parser->work_data_size) {
guint8 DID, SDID, DC;
guint i = 0, j;
gboolean composite;
guint checksum = 0;
/* Look for ADF */
if (data[parser->offset] == 0xfc) {
/* composite */
composite = TRUE;
i += 1;
} else if (data[parser->offset] == 0x00 &&
data[parser->offset + 1] == 0xff && data[parser->offset + 2] == 0xff) {
/* component */
composite = FALSE;
i += 3;
} else {
parser->offset += 1;
continue;
}
/* 4 words: DID, SDID, DC, [DATA], checksum */
if (parser->offset + i + 4 >= parser->work_data_size)
goto not_enough_data;
/* We have a valid ADF */
DID = data[parser->offset + i];
SDID = data[parser->offset + i + 1];
DC = data[parser->offset + i + 2];
i += 3;
/* Check if we have enough room to get the User Data and checksum */
if (parser->offset + i + DC + 1 >= parser->work_data_size)
goto not_enough_data;
/* We found a valid ANC \o/ */
anc->DID = DID;
anc->SDID_block_number = SDID;
anc->data_count = DC;
memset (anc->data, 0, 256);
/* i is at the beginning of the user data now */
for (j = 0; j < anc->data_count; j++)
anc->data[j] = data[parser->offset + i + j] & 0xff;
i += DC;
/* Checksum calculation SMPTE S291 3.2.1 */
for (j = (composite ? 1 : 3); j < i; j++)
checksum += data[parser->offset + j];
checksum &= 0xff;
if (checksum != data[parser->offset + i]) {
GST_WARNING ("ADF checksum mismatch: expected 0x%02x, got 0x%02x",
checksum, data[parser->offset + i]);
parser->offset += 1;
continue;
}
i += 1;
found = TRUE;
parser->offset += i;
break;
}
if (found)
return GST_VIDEO_VBI_PARSER_RESULT_OK;
return GST_VIDEO_VBI_PARSER_RESULT_DONE;
/* ERRORS */
not_enough_data:
{
GST_WARNING ("ANC requires more User Data than available line size");
/* Avoid further calls to go in the same error */
parser->offset = parser->work_data_size;
return GST_VIDEO_VBI_PARSER_RESULT_ERROR;
}
}
/**
* gst_video_vbi_parser_get_ancillary:
* @parser: a #GstVideoVBIParser
* @anc: (out caller-allocates): a #GstVideoAncillary to start the eventual ancillary data
*
* Parse the line provided previously by gst_video_vbi_parser_add_line().
*
* Since: 1.16
*
* Returns: %GST_VIDEO_VBI_PARSER_RESULT_OK if ancillary data was found and
* @anc was filled. %GST_VIDEO_VBI_PARSER_RESULT_DONE if there wasn't any
* data.
*/
GstVideoVBIParserResult
gst_video_vbi_parser_get_ancillary (GstVideoVBIParser * parser,
GstVideoAncillary * anc)
{
g_return_val_if_fail (parser != NULL, GST_VIDEO_VBI_PARSER_RESULT_ERROR);
g_return_val_if_fail (anc != NULL, GST_VIDEO_VBI_PARSER_RESULT_ERROR);
if (parser->bit16)
return get_ancillary_16 (parser, anc);
return get_ancillary_8 (parser, anc);
}
/**
* gst_video_vbi_parser_new:
* @format: a #GstVideoFormat
* @pixel_width: The width in pixel to use
*
* Create a new #GstVideoVBIParser for the specified @format and @pixel_width.
*
* Since: 1.16
*
* Returns: The new #GstVideoVBIParser or %NULL if the @format and/or @pixel_width
* is not supported.
*/
GstVideoVBIParser *
gst_video_vbi_parser_new (GstVideoFormat format, guint32 pixel_width)
{
GstVideoVBIParser *parser;
g_return_val_if_fail (pixel_width > 0, NULL);
switch (format) {
case GST_VIDEO_FORMAT_v210:
parser = g_new0 (GstVideoVBIParser, 1);
parser->bit16 = TRUE;
break;
case GST_VIDEO_FORMAT_UYVY:
parser = g_new0 (GstVideoVBIParser, 1);
parser->bit16 = FALSE;
break;
default:
GST_WARNING ("Format not supported by GstVideoVBIParser");
return NULL;
}
gst_video_info_init (&parser->info);
if (!gst_video_info_set_format (&parser->info, format, pixel_width, 1)) {
GST_ERROR ("Could not create GstVideoInfo");
g_free (parser);
return NULL;
}
/* Allocate the workspace which is going to be 2 * pixel_width big
* 2 : number of pixels per "component" (we only deal with 4:2:2)
* We use 1 or 2 bytes per pixel depending on whether we are internally
* working in 8 or 16bit */
parser->work_data_size = 2 * pixel_width;
if (parser->bit16)
parser->work_data = g_malloc0 (parser->work_data_size * 2);
else
parser->work_data = g_malloc0 (parser->work_data_size);
parser->offset = 0;
return parser;
}
/**
* gst_video_vbi_parser_free:
* @parser: a #GstVideoVBIParser
*
* Frees the @parser.
*
* Since: 1.16
*/
void
gst_video_vbi_parser_free (GstVideoVBIParser * parser)
{
g_return_if_fail (parser != NULL);
g_free (parser->work_data);
g_free (parser);
}
static void
convert_line_from_uyvy (GstVideoVBIParser * parser, const guint8 * data)
{
guint i;
guint8 *y = parser->work_data;
/* Data is stored differently in SD, making no distinction between Y and UV */
if (parser->info.width < 1280) {
for (i = 0; i < parser->info.width - 3; i += 4) {
*y++ = data[(i / 4) * 4 + 0];
*y++ = data[(i / 4) * 4 + 1];
*y++ = data[(i / 4) * 4 + 2];
*y++ = data[(i / 4) * 4 + 3];
}
} else {
guint8 *uv = y + parser->info.width;
for (i = 0; i < parser->info.width - 3; i += 4) {
*uv++ = data[(i / 4) * 4 + 0];
*y++ = data[(i / 4) * 4 + 1];
*uv++ = data[(i / 4) * 4 + 2];
*y++ = data[(i / 4) * 4 + 3];
}
}
GST_MEMDUMP ("Converted line", parser->work_data, 128);
}
static void
gst_info_dump_mem16_line (gchar * linebuf, gsize linebuf_size,
const guint16 * mem, gsize mem_offset, gsize mem_size)
{
gchar hexstr[50], digitstr[6];
if (mem_size > 8)
mem_size = 8;
hexstr[0] = '\0';
if (mem != NULL) {
guint i = 0;
mem += mem_offset;
while (i < mem_size) {
g_snprintf (digitstr, sizeof (digitstr), "%04x ", mem[i]);
g_strlcat (hexstr, digitstr, sizeof (hexstr));
++i;
}
}
g_snprintf (linebuf, linebuf_size, "%08x: %-48.48s",
(guint) mem_offset, hexstr);
}
static void
convert_line_from_v210 (GstVideoVBIParser * parser, const guint8 * data)
{
guint i;
guint16 *y = (guint16 *) parser->work_data;
guint32 a, b, c, d;
/* Data is stored differently in SD, making no distinction between Y and UV */
if (parser->info.width < 1280) {
/* Convert the line */
for (i = 0; i < parser->info.width - 5; i += 6) {
a = GST_READ_UINT32_LE (data + (i / 6) * 16 + 0);
b = GST_READ_UINT32_LE (data + (i / 6) * 16 + 4);
c = GST_READ_UINT32_LE (data + (i / 6) * 16 + 8);
d = GST_READ_UINT32_LE (data + (i / 6) * 16 + 12);
*y++ = (a >> 0) & 0x3ff;
*y++ = (a >> 10) & 0x3ff;
*y++ = (a >> 20) & 0x3ff;
*y++ = (b >> 0) & 0x3ff;
*y++ = (b >> 10) & 0x3ff;
*y++ = (b >> 20) & 0x3ff;
*y++ = (c >> 0) & 0x3ff;
*y++ = (c >> 10) & 0x3ff;
*y++ = (c >> 20) & 0x3ff;
*y++ = (d >> 0) & 0x3ff;
*y++ = (d >> 10) & 0x3ff;
*y++ = (d >> 20) & 0x3ff;
}
} else {
guint16 *uv = y + parser->info.width;
/* Convert the line */
for (i = 0; i < parser->info.width - 5; i += 6) {
a = GST_READ_UINT32_LE (data + (i / 6) * 16 + 0);
b = GST_READ_UINT32_LE (data + (i / 6) * 16 + 4);
c = GST_READ_UINT32_LE (data + (i / 6) * 16 + 8);
d = GST_READ_UINT32_LE (data + (i / 6) * 16 + 12);
*uv++ = (a >> 0) & 0x3ff;
*y++ = (a >> 10) & 0x3ff;
*uv++ = (a >> 20) & 0x3ff;
*y++ = (b >> 0) & 0x3ff;
*uv++ = (b >> 10) & 0x3ff;
*y++ = (b >> 20) & 0x3ff;
*uv++ = (c >> 0) & 0x3ff;
*y++ = (c >> 10) & 0x3ff;
*uv++ = (c >> 20) & 0x3ff;
*y++ = (d >> 0) & 0x3ff;
*uv++ = (d >> 10) & 0x3ff;
*y++ = (d >> 20) & 0x3ff;
}
}
if (0) {
guint off = 0;
gsize length = parser->info.width * 2;
GST_TRACE ("--------"
"-------------------------------------------------------------------");
while (off < length) {
gchar buf[128];
/* gst_info_dump_mem_line will process 16 bytes (8 16bit chunks) at most */
gst_info_dump_mem16_line (buf, sizeof (buf),
(guint16 *) parser->work_data, off, length - off);
GST_TRACE ("%s", buf);
off += 8;
}
GST_TRACE ("--------"
"-------------------------------------------------------------------");
}
}
/**
* gst_video_vbi_parser_add_line:
* @parser: a #GstVideoVBIParser
* @data: (array) (transfer none): The line of data to parse
*
* Provide a new line of data to the @parser. Call gst_video_vbi_parser_get_ancillary()
* to get the Ancillary data that might be present on that line.
*
* Since: 1.16
*/
void
gst_video_vbi_parser_add_line (GstVideoVBIParser * parser, const guint8 * data)
{
g_return_if_fail (parser != NULL);
g_return_if_fail (data != NULL);
/* Reset offset */
parser->offset = 0;
switch (GST_VIDEO_INFO_FORMAT (&parser->info)) {
case GST_VIDEO_FORMAT_v210:
convert_line_from_v210 (parser, data);
break;
case GST_VIDEO_FORMAT_UYVY:
convert_line_from_uyvy (parser, data);
break;
default:
GST_ERROR ("UNSUPPORTED FORMAT !");
g_assert_not_reached ();
break;
}
}
struct _GstVideoVBIEncoder
{
GstVideoInfo info; /* format of the lines provided */
guint8 *work_data; /* Converted line in planar 16bit format */
guint32 work_data_size; /* Size in bytes of work_data */
guint offset; /* Current offset (in bytes) in work_data */
gboolean bit16; /* Data is stored as 16bit if TRUE. Else 8bit(without parity) */
};
G_DEFINE_BOXED_TYPE (GstVideoVBIEncoder, gst_video_vbi_encoder,
(GBoxedCopyFunc) gst_video_vbi_encoder_copy,
(GBoxedFreeFunc) gst_video_vbi_encoder_free);
GstVideoVBIEncoder *
gst_video_vbi_encoder_copy (const GstVideoVBIEncoder * encoder)
{
GstVideoVBIEncoder *res;
g_return_val_if_fail (encoder != NULL, NULL);
res = gst_video_vbi_encoder_new (GST_VIDEO_INFO_FORMAT (&encoder->info),
encoder->info.width);
if (res) {
memcpy (res->work_data, encoder->work_data, encoder->work_data_size);
}
return res;
}
/**
* gst_video_vbi_encoder_free:
* @encoder: a #GstVideoVBIEncoder
*
* Frees the @encoder.
*
* Since: 1.16
*/
void
gst_video_vbi_encoder_free (GstVideoVBIEncoder * encoder)
{
g_return_if_fail (encoder != NULL);
g_free (encoder->work_data);
g_free (encoder);
}
/**
* gst_video_vbi_encoder_new:
* @format: a #GstVideoFormat
* @pixel_width: The width in pixel to use
*
* Create a new #GstVideoVBIEncoder for the specified @format and @pixel_width.
*
* Since: 1.16
*
* Returns: The new #GstVideoVBIEncoder or %NULL if the @format and/or @pixel_width
* is not supported.
*/
GstVideoVBIEncoder *
gst_video_vbi_encoder_new (GstVideoFormat format, guint32 pixel_width)
{
GstVideoVBIEncoder *encoder;
g_return_val_if_fail (pixel_width > 0, NULL);
switch (format) {
case GST_VIDEO_FORMAT_v210:
encoder = g_new0 (GstVideoVBIEncoder, 1);
encoder->bit16 = TRUE;
break;
case GST_VIDEO_FORMAT_UYVY:
encoder = g_new0 (GstVideoVBIEncoder, 1);
encoder->bit16 = FALSE;
break;
default:
GST_WARNING ("Format not supported by GstVideoVBIEncoder");
return NULL;
}
gst_video_info_init (&encoder->info);
if (!gst_video_info_set_format (&encoder->info, format, pixel_width, 1)) {
GST_ERROR ("Could not create GstVideoInfo");
g_free (encoder);
return NULL;
}
/* Allocate the workspace which is going to be 2 * pixel_width big
* 2 : number of pixels per "component" (we only deal with 4:2:2)
* We use 1 or 2 bytes per pixel depending on whether we are internally
* working in 8 or 16bit */
encoder->work_data_size = 2 * pixel_width;
if (encoder->bit16)
encoder->work_data = g_malloc0 (encoder->work_data_size * 2);
else
encoder->work_data = g_malloc0 (encoder->work_data_size);
encoder->offset = 0;
return encoder;
}
#if G_GNUC_CHECK_VERSION(3,4)
static inline guint
parity (guint8 x)
{
return __builtin_parity (x);
}
#else
static guint
parity (guint8 x)
{
guint count = 0;
while (x) {
count += x & 1;
x >>= 1;
}
return count & 1;
}
#endif
/* Odd/even parity in the upper two bits */
#define SET_WITH_PARITY(buf, val) G_STMT_START { \
*(buf) = val; \
if (parity (val)) \
*(buf) |= 0x100; \
else \
*(buf) |= 0x200; \
} G_STMT_END;
/**
* gst_video_vbi_encoder_add_ancillary:
* @encoder: a #GstVideoVBIEncoder
* @composite: %TRUE if composite ADF should be created, component otherwise
* @DID: The Data Identifier
* @SDID_block_number: The Secondary Data Identifier (if type 2) or the Data
* Block Number (if type 1)
* @data_count: The amount of data (in bytes) in @data (max 255 bytes)
* @data: (array length=data_count): The user data content of the Ancillary packet.
* Does not contain the ADF, DID, SDID nor CS.
*
* Stores Video Ancillary data, according to SMPTE-291M specification.
*
* Note that the contents of the data are always read as 8bit data (i.e. do not contain
* the parity check bits).
*
* Since: 1.16
*
* Returns: %TRUE if enough space was left in the current line, %FALSE
* otherwise.
*/
gboolean
gst_video_vbi_encoder_add_ancillary (GstVideoVBIEncoder * encoder,
gboolean composite, guint8 DID, guint8 SDID_block_number,
const guint8 * data, guint data_count)
{
g_return_val_if_fail (encoder != NULL, FALSE);
g_return_val_if_fail (data != NULL, FALSE);
g_return_val_if_fail (data_count < 256, FALSE);
/* Doesn't fit into this line anymore */
if (encoder->offset + data_count + (composite ? 5 : 7) >
encoder->work_data_size)
return FALSE;
if (encoder->bit16) {
guint16 *work_data = ((guint16 *) encoder->work_data) + encoder->offset;
guint i = 0, j;
guint checksum = 0;
/* Write ADF */
if (composite) {
work_data[i] = 0x3fc;
i += 1;
} else {
work_data[i] = 0x000;
work_data[i + 1] = 0x3ff;
work_data[i + 2] = 0x3ff;
i += 3;
}
SET_WITH_PARITY (&work_data[i], DID);
SET_WITH_PARITY (&work_data[i + 1], SDID_block_number);
SET_WITH_PARITY (&work_data[i + 2], data_count);
i += 3;
for (j = 0; j < data_count; j++)
SET_WITH_PARITY (&work_data[i + j], data[j]);
i += data_count;
for (j = (composite ? 1 : 3); j < i; j++)
checksum += work_data[j];
checksum &= 0x1ff;
checksum |= (!(checksum >> 8)) << 9;
work_data[i] = checksum;
i += 1;
encoder->offset += i;
} else {
guint8 *work_data = ((guint8 *) encoder->work_data) + encoder->offset;
guint i = 0, j;
guint checksum = 0;
/* Write ADF */
if (composite) {
work_data[i] = 0xfc;
i += 1;
} else {
work_data[i] = 0x00;
work_data[i + 1] = 0xff;
work_data[i + 2] = 0xff;
i += 3;
}
work_data[i] = DID;
work_data[i + 1] = SDID_block_number;
work_data[i + 2] = data_count;
i += 3;
for (j = 0; j < data_count; j++)
work_data[i + j] = data[j];
i += data_count;
for (j = (composite ? 1 : 3); j < i; j++)
checksum += work_data[j];
checksum &= 0xff;
work_data[i] = checksum;
i += 1;
encoder->offset += i;
}
return TRUE;
}
static void
convert_line_to_v210 (GstVideoVBIEncoder * encoder, guint8 * data)
{
guint i;
const guint16 *y = (const guint16 *) encoder->work_data;
guint32 a, b, c, d;
/* Data is stored differently in SD, making no distinction between Y and UV */
if (encoder->info.width < 1280) {
/* Convert the line */
for (i = 0; i < encoder->info.width - 5; i += 6) {
a = ((y[0] & 0x3ff) << 0)
| ((y[1] & 0x3ff) << 10)
| ((y[2] & 0x3ff) << 20);
y += 3;
b = ((y[0] & 0x3ff) << 0)
| ((y[1] & 0x3ff) << 10)
| ((y[2] & 0x3ff) << 20);
y += 3;
c = ((y[0] & 0x3ff) << 0)
| ((y[1] & 0x3ff) << 10)
| ((y[2] & 0x3ff) << 20);
y += 3;
d = ((y[0] & 0x3ff) << 0)
| ((y[1] & 0x3ff) << 10)
| ((y[2] & 0x3ff) << 20);
y += 3;
GST_WRITE_UINT32_LE (data + (i / 6) * 16 + 0, a);
GST_WRITE_UINT32_LE (data + (i / 6) * 16 + 4, b);
GST_WRITE_UINT32_LE (data + (i / 6) * 16 + 8, c);
GST_WRITE_UINT32_LE (data + (i / 6) * 16 + 12, d);
}
} else {
const guint16 *uv = y + encoder->info.width;
/* Convert the line */
for (i = 0; i < encoder->info.width - 5; i += 6) {
a = ((uv[0] & 0x3ff) << 0)
| ((y[0] & 0x3ff) << 10)
| ((uv[1] & 0x3ff) << 20);
uv += 2;
y++;
b = ((y[0] & 0x3ff) << 0)
| ((uv[0] & 0x3ff) << 10)
| ((y[1] & 0x3ff) << 20);
y += 2;
uv++;
c = ((uv[0] & 0x3ff) << 0)
| ((y[0] & 0x3ff) << 10)
| ((uv[1] & 0x3ff) << 20);
uv += 2;
y++;
d = ((y[0] & 0x3ff) << 0)
| ((uv[0] & 0x3ff) << 10)
| ((y[1] & 0x3ff) << 20);
y += 2;
uv++;
GST_WRITE_UINT32_LE (data + (i / 6) * 16 + 0, a);
GST_WRITE_UINT32_LE (data + (i / 6) * 16 + 4, b);
GST_WRITE_UINT32_LE (data + (i / 6) * 16 + 8, c);
GST_WRITE_UINT32_LE (data + (i / 6) * 16 + 12, d);
}
}
}
static void
convert_line_to_uyvy (GstVideoVBIEncoder * encoder, guint8 * data)
{
guint i;
const guint8 *y = encoder->work_data;
/* Data is stored differently in SD, making no distinction between Y and UV */
if (encoder->info.width < 1280) {
for (i = 0; i < encoder->info.width - 3; i += 4) {
data[(i / 4) * 4 + 0] = *y++;
data[(i / 4) * 4 + 1] = *y++;
data[(i / 4) * 4 + 2] = *y++;
data[(i / 4) * 4 + 3] = *y++;
}
} else {
const guint8 *uv = y + encoder->info.width;
for (i = 0; i < encoder->info.width - 3; i += 4) {
data[(i / 4) * 4 + 0] = *uv++;
data[(i / 4) * 4 + 1] = *y++;
data[(i / 4) * 4 + 2] = *uv++;
data[(i / 4) * 4 + 3] = *y++;
}
}
}
void
gst_video_vbi_encoder_write_line (GstVideoVBIEncoder * encoder, guint8 * data)
{
g_return_if_fail (encoder != NULL);
g_return_if_fail (data != NULL);
/* nothing to write? just exit early */
if (!encoder->offset)
return;
switch (GST_VIDEO_INFO_FORMAT (&encoder->info)) {
case GST_VIDEO_FORMAT_v210:
convert_line_to_v210 (encoder, data);
break;
case GST_VIDEO_FORMAT_UYVY:
convert_line_to_uyvy (encoder, data);
break;
default:
GST_ERROR ("UNSUPPORTED FORMAT !");
g_assert_not_reached ();
break;
}
encoder->offset = 0;
memset (encoder->work_data, 0,
encoder->work_data_size * (encoder->bit16 ? 2 : 1));
}
/* Closed Caption Meta implementation *******************************************/
GType
gst_video_caption_meta_api_get_type (void)
{
static GType type = 0;
if (g_once_init_enter (&type)) {
static const gchar *tags[] = { NULL };
GType _type = gst_meta_api_type_register ("GstVideoCaptionMetaAPI", tags);
GST_INFO ("registering");
g_once_init_leave (&type, _type);
}
return type;
}
static gboolean
gst_video_caption_meta_transform (GstBuffer * dest, GstMeta * meta,
GstBuffer * buffer, GQuark type, gpointer data)
{
GstVideoCaptionMeta *dmeta, *smeta;
/* We always copy over the caption meta */
smeta = (GstVideoCaptionMeta *) meta;
GST_DEBUG ("copy caption metadata");
dmeta =
gst_buffer_add_video_caption_meta (dest, smeta->caption_type,
smeta->data, smeta->size);
if (!dmeta)
return FALSE;
return TRUE;
}
static gboolean
gst_video_caption_meta_init (GstMeta * meta, gpointer params,
GstBuffer * buffer)
{
GstVideoCaptionMeta *emeta = (GstVideoCaptionMeta *) meta;
emeta->caption_type = GST_VIDEO_CAPTION_TYPE_UNKNOWN;
emeta->data = NULL;
emeta->size = 0;
return TRUE;
}
static void
gst_video_caption_meta_free (GstMeta * meta, GstBuffer * buffer)
{
GstVideoCaptionMeta *emeta = (GstVideoCaptionMeta *) meta;
g_free (emeta->data);
}
const GstMetaInfo *
gst_video_caption_meta_get_info (void)
{
static const GstMetaInfo *meta_info = NULL;
if (g_once_init_enter ((GstMetaInfo **) & meta_info)) {
const GstMetaInfo *mi = gst_meta_register (GST_VIDEO_CAPTION_META_API_TYPE,
"GstVideoCaptionMeta",
sizeof (GstVideoCaptionMeta),
gst_video_caption_meta_init,
gst_video_caption_meta_free,
gst_video_caption_meta_transform);
g_once_init_leave ((GstMetaInfo **) & meta_info, (GstMetaInfo *) mi);
}
return meta_info;
}
/**
* gst_buffer_add_video_caption_meta:
* @buffer: a #GstBuffer
* @caption_type: The type of Closed Caption to add
* @data: (array length=size) (transfer none): The Closed Caption data
* @size: The size of @data in bytes
*
* Attaches #GstVideoCaptionMeta metadata to @buffer with the given
* parameters.
*
* Returns: (transfer none): the #GstVideoCaptionMeta on @buffer.
*
* Since: 1.16
*/
GstVideoCaptionMeta *
gst_buffer_add_video_caption_meta (GstBuffer * buffer,
GstVideoCaptionType caption_type, const guint8 * data, gsize size)
{
GstVideoCaptionMeta *meta;
g_return_val_if_fail (GST_IS_BUFFER (buffer), NULL);
g_return_val_if_fail (data != NULL, NULL);
g_return_val_if_fail (size > 0, NULL);
switch (caption_type) {
case GST_VIDEO_CAPTION_TYPE_CEA608_RAW:
case GST_VIDEO_CAPTION_TYPE_CEA608_S334_1A:
case GST_VIDEO_CAPTION_TYPE_CEA708_RAW:
case GST_VIDEO_CAPTION_TYPE_CEA708_CDP:
break;
default:
GST_ERROR ("Unknown caption type !");
return NULL;
}
/* FIXME : Add checks for content ? */
meta = (GstVideoCaptionMeta *) gst_buffer_add_meta (buffer,
GST_VIDEO_CAPTION_META_INFO, NULL);
g_return_val_if_fail (meta != NULL, NULL);
meta->caption_type = caption_type;
meta->data = g_memdup (data, size);
meta->size = size;
return meta;
}
/**
* gst_video_caption_type_from_caps:
* @caps: Fixed #GstCaps to parse
*
* Parses fixed Closed Caption #GstCaps and returns the corresponding caption
* type, or %GST_VIDEO_CAPTION_TYPE_UNKNOWN.
*
* Returns: #GstVideoCaptionType.
*
* Since: 1.16
*/
GstVideoCaptionType
gst_video_caption_type_from_caps (const GstCaps * caps)
{
const GstStructure *s;
const gchar *format;
g_return_val_if_fail (gst_caps_is_fixed (caps),
GST_VIDEO_CAPTION_TYPE_UNKNOWN);
s = gst_caps_get_structure (caps, 0);
g_return_val_if_fail (s != NULL, GST_VIDEO_CAPTION_TYPE_UNKNOWN);
format = gst_structure_get_string (s, "format");
if (gst_structure_has_name (s, "closedcaption/x-cea-608")) {
if (g_strcmp0 (format, "raw") == 0) {
return GST_VIDEO_CAPTION_TYPE_CEA608_RAW;
} else if (g_strcmp0 (format, "s334-1a") == 0) {
return GST_VIDEO_CAPTION_TYPE_CEA608_S334_1A;
}
} else if (gst_structure_has_name (s, "closedcaption/x-cea-708")) {
if (g_strcmp0 (format, "cc_data") == 0) {
return GST_VIDEO_CAPTION_TYPE_CEA708_RAW;
} else if (g_strcmp0 (format, "cdp") == 0) {
return GST_VIDEO_CAPTION_TYPE_CEA708_CDP;
}
}
return GST_VIDEO_CAPTION_TYPE_UNKNOWN;
}
/**
* gst_video_caption_type_to_caps:
* @type: #GstVideoCaptionType
*
* Creates new caps corresponding to @type.
*
* Returns: (transfer full): new #GstCaps
*
* Since: 1.16
*/
GstCaps *
gst_video_caption_type_to_caps (GstVideoCaptionType type)
{
GstCaps *caption_caps;
g_return_val_if_fail (type != GST_VIDEO_CAPTION_TYPE_UNKNOWN, NULL);
switch (type) {
case GST_VIDEO_CAPTION_TYPE_CEA608_RAW:
caption_caps = gst_caps_new_simple ("closedcaption/x-cea-608",
"format", G_TYPE_STRING, "raw", NULL);
break;
case GST_VIDEO_CAPTION_TYPE_CEA608_S334_1A:
caption_caps = gst_caps_new_simple ("closedcaption/x-cea-608",
"format", G_TYPE_STRING, "s334-1a", NULL);
break;
case GST_VIDEO_CAPTION_TYPE_CEA708_RAW:
caption_caps = gst_caps_new_simple ("closedcaption/x-cea-708",
"format", G_TYPE_STRING, "cc_data", NULL);
break;
case GST_VIDEO_CAPTION_TYPE_CEA708_CDP:
caption_caps = gst_caps_new_simple ("closedcaption/x-cea-708",
"format", G_TYPE_STRING, "cdp", NULL);
break;
default:
g_return_val_if_reached (NULL);
break;
}
return caption_caps;
}
/* Active Format Description (AFD) Meta implementation */
GType
gst_video_afd_meta_api_get_type (void)
{
static GType type = 0;
if (g_once_init_enter (&type)) {
static const gchar *tags[] = {
GST_META_TAG_VIDEO_SIZE_STR,
GST_META_TAG_VIDEO_ORIENTATION_STR,
GST_META_TAG_VIDEO_STR,
NULL
};
GType _type = gst_meta_api_type_register ("GstVideoAFDMetaAPI", tags);
g_once_init_leave (&type, _type);
}
return type;
}
static gboolean
gst_video_afd_meta_init (GstMeta * meta, gpointer params, GstBuffer * buffer)
{
GstVideoAFDMeta *emeta = (GstVideoAFDMeta *) meta;
emeta->field = 0;
emeta->spec = GST_VIDEO_AFD_SPEC_ATSC_A53;
emeta->afd = GST_VIDEO_AFD_UNAVAILABLE;
return TRUE;
}
static gboolean
gst_video_afd_meta_transform (GstBuffer * dest, GstMeta * meta,
GstBuffer * buffer, GQuark type, gpointer data)
{
GstVideoAFDMeta *smeta = (GstVideoAFDMeta *) meta;
if (GST_META_TRANSFORM_IS_COPY (type)) {
GST_DEBUG ("copy AFD metadata");
gst_buffer_add_video_afd_meta (dest, smeta->field, smeta->spec, smeta->afd);
return TRUE;
} else if (GST_VIDEO_META_TRANSFORM_IS_SCALE (type)) {
GstVideoMetaTransform *trans = data;
gdouble diff;
gint ow, oh, nw, nh;
gint opn, opd, npn, npd;
ow = GST_VIDEO_INFO_WIDTH (trans->in_info);
nw = GST_VIDEO_INFO_WIDTH (trans->out_info);
oh = GST_VIDEO_INFO_HEIGHT (trans->in_info);
nh = GST_VIDEO_INFO_HEIGHT (trans->out_info);
opn = GST_VIDEO_INFO_PAR_N (trans->in_info);
opd = GST_VIDEO_INFO_PAR_D (trans->in_info);
npn = GST_VIDEO_INFO_PAR_N (trans->out_info);
npd = GST_VIDEO_INFO_PAR_D (trans->out_info);
/* if the aspect ratio stays the same we can copy the meta, otherwise
* we can't know if the aspect ratio was changed or black borders were
* introduced. Both would invalidate the AFD meta */
diff =
ABS (((gdouble) ow / (gdouble) oh) * ((gdouble) opn / (gdouble) opd) -
((gdouble) nw / (gdouble) nh) * ((gdouble) npn / (gdouble) npd));
if (diff < 0.0001) {
GST_DEBUG ("copying AFD metadata, aspect ratio did not change");
gst_buffer_add_video_afd_meta (dest, smeta->field, smeta->spec,
smeta->afd);
return TRUE;
} else {
return FALSE;
}
} else {
/* return FALSE, if transform type is not supported */
return FALSE;
}
}
const GstMetaInfo *
gst_video_afd_meta_get_info (void)
{
static const GstMetaInfo *meta_info = NULL;
if (g_once_init_enter ((GstMetaInfo **) & meta_info)) {
const GstMetaInfo *mi = gst_meta_register (GST_VIDEO_AFD_META_API_TYPE,
"GstVideoAFDMeta",
sizeof (GstVideoAFDMeta),
gst_video_afd_meta_init,
NULL,
gst_video_afd_meta_transform);
g_once_init_leave ((GstMetaInfo **) & meta_info, (GstMetaInfo *) mi);
}
return meta_info;
}
/**
* gst_buffer_add_video_afd_meta:
* @buffer: a #GstBuffer
* @field: 0 for progressive or field 1 and 1 for field 2
* @spec: #GstVideoAFDSpec that applies to AFD value
* @afd: #GstVideoAFDValue AFD enumeration
*
* Attaches #GstVideoAFDMeta metadata to @buffer with the given
* parameters.
*
* Returns: (transfer none): the #GstVideoAFDMeta on @buffer.
*
* Since: 1.18
*/
GstVideoAFDMeta *
gst_buffer_add_video_afd_meta (GstBuffer * buffer, guint8 field,
GstVideoAFDSpec spec, GstVideoAFDValue afd)
{
GstVideoAFDMeta *meta;
gint8 afd_data = (gint8) afd;
g_return_val_if_fail (GST_IS_BUFFER (buffer), NULL);
g_return_val_if_fail (field <= 1, NULL);
g_return_val_if_fail ((guint8) spec <= 2, NULL);
/* AFD is stored in a nybble */
g_return_val_if_fail (afd_data <= 0xF, NULL);
/* reserved values for all specifications */
g_return_val_if_fail (afd_data != 1 && (afd_data < 5 || afd_data > 7)
&& afd_data != 12, NULL);
/* reserved for DVB/ETSI */
g_return_val_if_fail ((spec != GST_VIDEO_AFD_SPEC_DVB_ETSI)
|| (afd_data != 0), NULL);
meta = (GstVideoAFDMeta *) gst_buffer_add_meta (buffer,
GST_VIDEO_AFD_META_INFO, NULL);
g_assert (meta != NULL);
meta->field = field;
meta->spec = spec;
meta->afd = afd;
return meta;
}
/* Bar Meta implementation */
GType
gst_video_bar_meta_api_get_type (void)
{
static GType type = 0;
if (g_once_init_enter (&type)) {
static const gchar *tags[] = {
GST_META_TAG_VIDEO_SIZE_STR,
GST_META_TAG_VIDEO_ORIENTATION_STR,
GST_META_TAG_VIDEO_STR,
NULL
};
GType _type = gst_meta_api_type_register ("GstVideoBarMetaAPI", tags);
g_once_init_leave (&type, _type);
}
return type;
}
static gboolean
gst_video_bar_meta_init (GstMeta * meta, gpointer params, GstBuffer * buffer)
{
GstVideoBarMeta *emeta = (GstVideoBarMeta *) meta;
emeta->field = 0;
emeta->is_letterbox = FALSE;
emeta->bar_data1 = 0;
emeta->bar_data2 = 0;
return TRUE;
}
static gboolean
gst_video_bar_meta_transform (GstBuffer * dest, GstMeta * meta,
GstBuffer * buffer, GQuark type, gpointer data)
{
GstVideoBarMeta *smeta = (GstVideoBarMeta *) meta;
if (GST_META_TRANSFORM_IS_COPY (type)) {
GST_DEBUG ("copy Bar metadata");
gst_buffer_add_video_bar_meta (dest, smeta->field, smeta->is_letterbox,
smeta->bar_data1, smeta->bar_data2);
return TRUE;
} else {
/* return FALSE, if transform type is not supported */
return FALSE;
}
}
const GstMetaInfo *
gst_video_bar_meta_get_info (void)
{
static const GstMetaInfo *meta_info = NULL;
if (g_once_init_enter ((GstMetaInfo **) & meta_info)) {
const GstMetaInfo *mi = gst_meta_register (GST_VIDEO_BAR_META_API_TYPE,
"GstVideoBarMeta",
sizeof (GstVideoBarMeta),
gst_video_bar_meta_init,
NULL,
gst_video_bar_meta_transform);
g_once_init_leave ((GstMetaInfo **) & meta_info, (GstMetaInfo *) mi);
}
return meta_info;
}
/**
* gst_buffer_add_video_bar_meta:
* @buffer: a #GstBuffer
* @field: 0 for progressive or field 1 and 1 for field 2
* @is_letterbox: if true then bar data specifies letterbox, otherwise pillarbox
* @bar_data1: If @is_letterbox is true, then the value specifies the
* last line of a horizontal letterbox bar area at top of reconstructed frame.
* Otherwise, it specifies the last horizontal luminance sample of a vertical pillarbox
* bar area at the left side of the reconstructed frame
* @bar_data2: If @is_letterbox is true, then the value specifies the
* first line of a horizontal letterbox bar area at bottom of reconstructed frame.
* Otherwise, it specifies the first horizontal
* luminance sample of a vertical pillarbox bar area at the right side of the reconstructed frame.
*
* Attaches #GstVideoBarMeta metadata to @buffer with the given
* parameters.
*
* Returns: (transfer none): the #GstVideoBarMeta on @buffer.
*
* See Table 6.11 Bar Data Syntax
*
* https://www.atsc.org/wp-content/uploads/2015/03/a_53-Part-4-2009.pdf
*
* Since: 1.18
*/
GstVideoBarMeta *
gst_buffer_add_video_bar_meta (GstBuffer * buffer, guint8 field,
gboolean is_letterbox, guint bar_data1, guint bar_data2)
{
GstVideoBarMeta *meta;
g_return_val_if_fail (GST_IS_BUFFER (buffer), NULL);
g_return_val_if_fail (field <= 1, NULL);
meta = (GstVideoBarMeta *) gst_buffer_add_meta (buffer,
GST_VIDEO_BAR_META_INFO, NULL);
g_assert (meta != NULL);
meta->field = field;
meta->is_letterbox = is_letterbox;
meta->bar_data1 = bar_data1;
meta->bar_data2 = bar_data2;
return meta;
}
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