mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-12-04 23:46:43 +00:00
Code Issues 1 Projects Releases Wiki Activity
gstreamer/subprojects/gst-plugins-base/gst-libs/gst/video/video-anc.c

1371 lines
38 KiB
C
Raw Blame History

/* 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: (nullable): 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: (nullable): 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_memdup2 (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;
}
Reference in a new issue View git blame Copy permalink