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/* GStreamer JPEG 2000 Parser
*
* Copyright (C) <2016> Milos Seleceni
* @author Milos Seleceni <milos.seleceni@comprimato.com>
*
* Copyright (C) <2016-2017> Grok Image Compression Inc.
* @author Aaron Boxer <boxerab@gmail.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 <stdio.h>
#include "gstbasetsmuxjpeg2000.h"
#include <string.h>
#include <gst/audio/audio.h>
#include <gst/base/gstbytewriter.h>
#include <gst/gst.h>
#define GST_CAT_DEFAULT gst_base_ts_mux_debug
GstBuffer *
gst_base_ts_mux_prepare_jpeg2000 (GstBuffer * buf, GstBaseTsMuxPad * pad,
GstBaseTsMux * mux)
{
j2k_private_data *private_data = pad->prepare_data;
GstByteWriter wr;
GstBuffer *out_buf = NULL;
guint8 *elsm_header = NULL;
const guint header_size = private_data->interlace ? 48 : 38;
GstClockTime seconds = buf->pts / GST_SECOND;
GstClockTime minutes = seconds / 60;
GstClockTime hours = minutes / 60;
/* interlaced not supported */
if (private_data->interlace) {
GST_ERROR_OBJECT (mux, "Interlaced not supported");
return NULL;
}
seconds = seconds % 60;
minutes = minutes % 60;
hours = hours % 24;
/* ??? Hack for missing frame number index in buffer offset */
/* guint8 frame_number = private_data->frame_number % 60; */
gst_byte_writer_init_with_size (&wr, header_size, FALSE);
/* Elementary stream header box 'elsm' == 0x656c736d */
gst_byte_writer_put_uint32_be (&wr, 0x656c736d);
/* Framerate box 'frat' == 0x66726174 */
gst_byte_writer_put_uint32_be (&wr, 0x66726174);
/* put framerate denominator */
gst_byte_writer_put_uint16_be (&wr, private_data->den);
/* put framerate numerator */
gst_byte_writer_put_uint16_be (&wr, private_data->num);
/* Maximum bitrate box 'brat' == 0x62726174 */
gst_byte_writer_put_uint32_be (&wr, 0x62726174);
/* put Maximum bitrate */
gst_byte_writer_put_uint32_be (&wr, private_data->max_bitrate);
/* put size of first codestream */
/* private_data->AUF[0] */
gst_byte_writer_put_uint32_be (&wr, gst_buffer_get_size (buf));
/* ToDo: the if block below is never called, because we do not support muxing J2K-over-mpeg-TS interlaced data
* If we ever do, then the code below will need to tested and perhaps modified
*/
if (private_data->interlace) {
/* put size of second codestream */
gst_byte_writer_put_uint32_be (&wr, gst_buffer_get_size (buf));
/* Time Code Box 'fiel' == 0x6669656c */
gst_byte_writer_put_uint32_be (&wr, 0x6669656c);
/* put Fic */
gst_byte_writer_put_uint8 (&wr, private_data->Fic);
/* put Fio */
gst_byte_writer_put_uint8 (&wr, private_data->Fio);
}
/* Time Code Box 'tcod' == 0x74636f64 */
gst_byte_writer_put_uint32_be (&wr, 0x74636f64);
/* put HHMMSSFF */
gst_byte_writer_put_uint8 (&wr, (guint8) hours);
gst_byte_writer_put_uint8 (&wr, (guint8) minutes);
gst_byte_writer_put_uint8 (&wr, (guint8) seconds);
gst_byte_writer_put_uint8 (&wr, 0x0);
/* ??? Hack for missing frame number index in buffer offset */
/* private_data->frame_number++; */
/* Broadcast Color Box 'bcol' == 0x62636f6c */
gst_byte_writer_put_uint32_be (&wr, 0x62636f6c);
/* put color spec */
gst_byte_writer_put_uint8 (&wr, private_data->color_spec);
/* put reserved 8-bit */
gst_byte_writer_put_uint8 (&wr, 0xff);
/* Allocate ELSM header size only; gst_buffer_copy_into will add gst_buffer_get_size (buf) bytes to out_buf */
out_buf = gst_buffer_new_and_alloc (header_size);
/* Copy ELSM header */
elsm_header = gst_byte_writer_reset_and_get_data (&wr);
gst_buffer_fill (out_buf, 0, elsm_header, header_size);
g_free (elsm_header);
/* Copy complete frame */
gst_buffer_copy_into (out_buf, buf,
GST_BUFFER_COPY_METADATA | GST_BUFFER_COPY_TIMESTAMPS |
GST_BUFFER_COPY_MEMORY, 0, -1);
GST_DEBUG_OBJECT (mux, "Prepared J2K PES of size %d",
(int) gst_buffer_get_size (out_buf));
return out_buf;
}
void
gst_base_ts_mux_free_jpeg2000 (gpointer prepare_data)
{
/* Free prepare data memory object */
g_free (prepare_data);
}
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