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136 lines
4.7 KiB
C
136 lines
4.7 KiB
C
/* GStreamer JPEG 2000 Parser
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*
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* Copyright (C) <2016> Milos Seleceni
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* @author Milos Seleceni <milos.seleceni@comprimato.com>
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*
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* Copyright (C) <2016-2017> Grok Image Compression Inc.
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* @author Aaron Boxer <boxerab@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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* SPDX-License-Identifier: LGPL-2.0-or-later
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdio.h>
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#include "gstbasetsmuxjpeg2000.h"
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#include <string.h>
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#include <gst/audio/audio.h>
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#include <gst/base/gstbytewriter.h>
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#include <gst/gst.h>
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#define GST_CAT_DEFAULT gst_base_ts_mux_debug
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GstBuffer *
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gst_base_ts_mux_prepare_jpeg2000 (GstBuffer * buf, GstBaseTsMuxPad * pad,
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GstBaseTsMux * mux)
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{
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j2k_private_data *private_data = pad->prepare_data;
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GstByteWriter wr;
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GstBuffer *out_buf = NULL;
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guint8 *elsm_header = NULL;
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const guint header_size = private_data->interlace ? 48 : 38;
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GstClockTime seconds = buf->pts / GST_SECOND;
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GstClockTime minutes = seconds / 60;
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GstClockTime hours = minutes / 60;
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/* interlaced not supported */
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if (private_data->interlace) {
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GST_ERROR_OBJECT (mux, "Interlaced not supported");
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return NULL;
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}
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seconds = seconds % 60;
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minutes = minutes % 60;
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hours = hours % 24;
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/* ??? Hack for missing frame number index in buffer offset */
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/* guint8 frame_number = private_data->frame_number % 60; */
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gst_byte_writer_init_with_size (&wr, header_size, FALSE);
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/* Elementary stream header box 'elsm' == 0x656c736d */
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gst_byte_writer_put_uint32_be (&wr, 0x656c736d);
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/* Framerate box 'frat' == 0x66726174 */
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gst_byte_writer_put_uint32_be (&wr, 0x66726174);
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/* put framerate denominator */
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gst_byte_writer_put_uint16_be (&wr, private_data->den);
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/* put framerate numerator */
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gst_byte_writer_put_uint16_be (&wr, private_data->num);
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/* Maximum bitrate box 'brat' == 0x62726174 */
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gst_byte_writer_put_uint32_be (&wr, 0x62726174);
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/* put Maximum bitrate */
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gst_byte_writer_put_uint32_be (&wr, private_data->max_bitrate);
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/* put size of first codestream */
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/* private_data->AUF[0] */
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gst_byte_writer_put_uint32_be (&wr, gst_buffer_get_size (buf));
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/* ToDo: the if block below is never called, because we do not support muxing J2K-over-mpeg-TS interlaced data
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* If we ever do, then the code below will need to tested and perhaps modified
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*/
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if (private_data->interlace) {
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/* put size of second codestream */
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gst_byte_writer_put_uint32_be (&wr, gst_buffer_get_size (buf));
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/* Time Code Box 'fiel' == 0x6669656c */
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gst_byte_writer_put_uint32_be (&wr, 0x6669656c);
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/* put Fic */
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gst_byte_writer_put_uint8 (&wr, private_data->Fic);
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/* put Fio */
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gst_byte_writer_put_uint8 (&wr, private_data->Fio);
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}
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/* Time Code Box 'tcod' == 0x74636f64 */
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gst_byte_writer_put_uint32_be (&wr, 0x74636f64);
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/* put HHMMSSFF */
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gst_byte_writer_put_uint8 (&wr, (guint8) hours);
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gst_byte_writer_put_uint8 (&wr, (guint8) minutes);
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gst_byte_writer_put_uint8 (&wr, (guint8) seconds);
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gst_byte_writer_put_uint8 (&wr, 0x0);
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/* ??? Hack for missing frame number index in buffer offset */
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/* private_data->frame_number++; */
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/* Broadcast Color Box 'bcol' == 0x62636f6c */
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gst_byte_writer_put_uint32_be (&wr, 0x62636f6c);
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/* put color spec */
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gst_byte_writer_put_uint8 (&wr, private_data->color_spec);
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/* put reserved 8-bit */
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gst_byte_writer_put_uint8 (&wr, 0xff);
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/* Allocate ELSM header size only; gst_buffer_copy_into will add gst_buffer_get_size (buf) bytes to out_buf */
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out_buf = gst_buffer_new_and_alloc (header_size);
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/* Copy ELSM header */
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elsm_header = gst_byte_writer_reset_and_get_data (&wr);
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gst_buffer_fill (out_buf, 0, elsm_header, header_size);
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g_free (elsm_header);
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/* Copy complete frame */
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gst_buffer_copy_into (out_buf, buf,
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GST_BUFFER_COPY_METADATA | GST_BUFFER_COPY_TIMESTAMPS |
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GST_BUFFER_COPY_MEMORY, 0, -1);
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GST_DEBUG_OBJECT (mux, "Prepared J2K PES of size %d",
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(int) gst_buffer_get_size (out_buf));
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return out_buf;
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}
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void
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gst_base_ts_mux_free_jpeg2000 (gpointer prepare_data)
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{
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/* Free prepare data memory object */
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g_free (prepare_data);
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}
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