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/*
* GStreamer QuickTime video decoder codecs wrapper
* Copyright <2006, 2007> Fluendo <gstreamer@fluendo.com>
* Copyright <2006, 2007> Pioneers of the Inevitable <songbird@songbirdnest.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Alternatively, the contents of this file may be used under the
* GNU Lesser General Public License Version 2.1 (the "LGPL"), in
* which case the following provisions apply instead of the ones
* mentioned above:
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <string.h>
#include "imagedescription.h"
static ImageDescription *
image_description_for_avc1 (GstBuffer * buf)
{
ImageDescription *desc = NULL;
guint8 *pos;
desc = g_malloc0 (sizeof (ImageDescription) + GST_BUFFER_SIZE (buf) + 8);
pos = (guint8 *) desc + sizeof (ImageDescription);
desc->idSize = sizeof (ImageDescription) + GST_BUFFER_SIZE (buf) + 8;
/* write size in Big-Endian */
GST_WRITE_UINT32_BE (pos, GST_BUFFER_SIZE (buf) + 8);
GST_WRITE_UINT32_LE (pos + 4, QT_MAKE_FOURCC_BE ('a', 'v', 'c', 'C'));
g_memmove (pos + 8, GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
return desc;
}
/* image_description_for_mp4v
*
* mpeg4 video has an 'esds' atom as extension for the ImageDescription.
* It is meant to contain the ES Description.
* We here create a fake one.
*/
static ImageDescription *
image_description_for_mp4v (GstBuffer * buf)
{
ImageDescription *desc = NULL;
guint32 offset = sizeof (ImageDescription);
guint8 *location;
GST_LOG ("buf %p , size:%d", buf, GST_BUFFER_SIZE (buf));
/* this image description contains:
* ImageDescription sizeof(ImageDescription)
* esds atom 34 bytes
* buffer GST_BUFFER_SIZE (buf)
* ending 3 bytes
*/
desc = g_malloc0 (offset + 37 + GST_BUFFER_SIZE (buf));
desc->idSize = offset + 37 + GST_BUFFER_SIZE (buf);
location = (guint8 *) desc + offset;
/* Fill in ESDS */
/* size */
GST_WRITE_UINT32_BE (location, 37 + GST_BUFFER_SIZE (buf));
/* atom */
GST_WRITE_UINT32_LE (location + 4, GST_MAKE_FOURCC ('e', 's', 'd', 's'));
/* version + flags */
QT_WRITE_UINT32 (location + 8, 0);
/* tag */
QT_WRITE_UINT8 (location + 12, 0x3);
/* size (buffsize + 23) */
QT_WRITE_UINT8 (location + 13, GST_BUFFER_SIZE (buf) + 23);
/* ESID */
QT_WRITE_UINT16 (location + 14, 0);
/* priority */
QT_WRITE_UINT8 (location + 16, 0);
/* tag */
QT_WRITE_UINT8 (location + 17, 0x4);
/* size (buffsize + 8) */
QT_WRITE_UINT8 (location + 18, GST_BUFFER_SIZE (buf) + 15);
/* object type */
QT_WRITE_UINT8 (location + 19, 0x20);
/* stream type */
QT_WRITE_UINT8 (location + 20, 0x11);
/* buffersize db */
QT_WRITE_UINT24 (location + 21, 13640);
/* max bitrate */
QT_WRITE_UINT32 (location + 24, 1849648);
/* avg bitrate */
QT_WRITE_UINT32 (location + 28, 918191);
/* tag */
QT_WRITE_UINT8 (location + 32, 0x05);
/* size */
QT_WRITE_UINT8 (location + 33, GST_BUFFER_SIZE (buf));
/* codec data */
g_memmove (location + 34, GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
/* end */
QT_WRITE_UINT8 (location + 34 + GST_BUFFER_SIZE (buf), 0x06);
QT_WRITE_UINT8 (location + 34 + GST_BUFFER_SIZE (buf) + 1, 0x01);
QT_WRITE_UINT8 (location + 34 + GST_BUFFER_SIZE (buf) + 2, 0x02);
return desc;
}
static ImageDescription *
image_description_from_stsd_buffer (GstBuffer * buf)
{
ImageDescription *desc = NULL;
guint8 *content;
guint size;
gint imds;
GST_LOG ("buffer %p, size:%u", buf, GST_BUFFER_SIZE (buf));
/* The buffer contains a full atom, we only need the contents */
/* This buffer has data in big-endian, we need to read it as such.
* except for the fourcc which are ALWAYS big-endian. */
content = GST_BUFFER_DATA (buf) + 16;
size = GST_BUFFER_SIZE (buf) - 16;
#if DEBUG_DUMP
GST_LOG ("incoming data in big-endian");
gst_util_dump_mem (content, size);
#endif
desc = g_malloc0 (size);
desc->idSize = size;
desc->cType = GST_READ_UINT32_BE (content + 4);
desc->version = QT_UINT16 (content + 16);
desc->revisionLevel = QT_UINT16 (content + 18);
desc->vendor = GST_READ_UINT32_BE (content + 20);
desc->temporalQuality = QT_UINT32 (content + 24);
desc->spatialQuality = QT_UINT32 (content + 24);
desc->dataSize = QT_UINT32 (content + 44);
desc->frameCount = QT_UINT16 (content + 48);
desc->depth = QT_UINT16 (content + 82);
desc->clutID = QT_UINT16 (content + 84);
imds = 86; /* sizeof (ImageDescription); */
if (desc->idSize > imds) {
GST_LOG ("Copying %d bytes from %p to %p",
size - imds, content + imds, desc + imds);
memcpy ((guint8 *) desc + imds, (guint8 *) content + imds, size - imds);
}
#if DEBUG_DUMP
GST_LOG ("outgoing data in machine-endian");
dump_image_description (desc);
#endif
return desc;
}
ImageDescription *
image_description_from_codec_data (GstBuffer * buf, guint32 codectype)
{
ImageDescription *desc = NULL;
GST_LOG ("codectype:%" GST_FOURCC_FORMAT " buf:%p",
GST_FOURCC_ARGS (codectype), buf);
if ((GST_BUFFER_SIZE (buf) == GST_READ_UINT32_BE (GST_BUFFER_DATA (buf))) &&
(QT_MAKE_FOURCC_LE ('s', 't', 's',
'd') == GST_READ_UINT32_BE (GST_BUFFER_DATA (buf) + 4))) {
/* We have the full stsd (ImageDescription) in our codec_data */
desc = image_description_from_stsd_buffer (buf);
} else {
switch (codectype) {
case QT_MAKE_FOURCC_LE ('m', 'p', '4', 'v'):
desc = image_description_for_mp4v (buf);
break;
case QT_MAKE_FOURCC_LE ('a', 'v', 'c', '1'):
desc = image_description_for_avc1 (buf);
break;
default:
GST_WARNING ("Format not handled !");
}
}
return desc;
}
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