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gstreamer/subprojects/gst-plugins-bad/gst/jp2kdecimator/jp2kcodestream.c

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/* GStreamer
* Copyright (C) 2010 Oblong Industries, Inc.
* Copyright (C) 2010 Collabora Multimedia
*
* 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 "jp2kcodestream.h"
GST_DEBUG_CATEGORY_EXTERN (gst_jp2k_decimator_debug);
#define GST_CAT_DEFAULT gst_jp2k_decimator_debug
/* Delimiting markers and marker segments */
#define MARKER_SOC 0xFF4F
#define MARKER_SOT 0xFF90
#define MARKER_SOD 0xFF93
#define MARKER_EOC 0xFFD9
/* Fixed information marker segments */
#define MARKER_SIZ 0xFF51
/* Functional marker segments */
#define MARKER_COD 0xFF52
#define MARKER_COC 0xFF53
#define MARKER_RGN 0xFF5E
#define MARKER_QCD 0xFF5C
#define MARKER_QCC 0xFF5D
#define MARKER_POC 0xFF5F
/* Pointer marker segments */
#define MARKER_PLM 0xFF57
#define MARKER_PLT 0xFF58
#define MARKER_PPM 0xFF60
#define MARKER_PPT 0xFF61
#define MARKER_TLM 0xFF55
/* In-bit-stream markers and marker segments */
#define MARKER_SOP 0xFF91
#define MARKER_EPH 0xFF92
/* Informational marker segments */
#define MARKER_CRG 0xFF63
#define MARKER_COM 0xFF64
static void
packet_iterator_changed_resolution_or_component (PacketIterator * it)
{
gint tx0, tx1, ty0, ty1;
gint tcx0, tcx1, tcy0, tcy1;
gint trx0, trx1, try0, try1;
gint tpx0, tpx1, tpy0, tpy1;
gint two_nl_r;
gint two_ppx, two_ppy;
gint xr, yr;
guint8 *PPx, *PPy;
tx0 = it->tile->tx0;
tx1 = it->tile->tx1;
ty0 = it->tile->ty0;
ty1 = it->tile->ty1;
it->two_nl_r = two_nl_r = (1 << (it->n_resolutions - it->cur_resolution - 1));
PPx = it->tile->cod ? it->tile->cod->PPx : it->header->cod.PPx;
PPy = it->tile->cod ? it->tile->cod->PPy : it->header->cod.PPy;
it->two_ppx = two_ppx = (1 << (PPx ? PPx[it->cur_resolution] : 15));
it->two_ppy = two_ppy = (1 << (PPy ? PPy[it->cur_resolution] : 15));
it->xr = xr = it->header->siz.components[it->cur_component].xr;
it->yr = yr = it->header->siz.components[it->cur_component].yr;
it->tcx0 = tcx0 = (tx0 + xr - 1) / xr;
it->tcx1 = tcx1 = (tx1 + xr - 1) / xr;
it->tcy0 = tcy0 = (ty0 + yr - 1) / yr;
it->tcy1 = tcy1 = (ty1 + yr - 1) / yr;
it->trx0 = trx0 = (tcx0 + two_nl_r - 1) / two_nl_r;
it->trx1 = trx1 = (tcx1 + two_nl_r - 1) / two_nl_r;
it->try0 = try0 = (tcy0 + two_nl_r - 1) / two_nl_r;
it->try1 = try1 = (tcy1 + two_nl_r - 1) / two_nl_r;
it->tpx0 = tpx0 = two_ppx * (trx0 / two_ppx);
it->tpx1 = tpx1 = two_ppx * ((trx1 + two_ppx - 1) / two_ppx);
it->tpy0 = tpy0 = two_ppy * (try0 / two_ppy);
it->tpy1 = tpy1 = two_ppy * ((try1 + two_ppy - 1) / two_ppy);
it->n_precincts_w = (trx0 == trx1) ? 0 : (tpx1 - tpx0) / two_ppx;
it->n_precincts_h = (try0 == try1) ? 0 : (tpy1 - tpy0) / two_ppy;
it->n_precincts = it->n_precincts_w * it->n_precincts_h;
}
static gboolean
packet_iterator_next_lrcp (PacketIterator * it)
{
g_return_val_if_fail (it->cur_layer < it->n_layers, FALSE);
if (it->first) {
packet_iterator_changed_resolution_or_component (it);
it->first = FALSE;
return TRUE;
}
it->cur_precinct += 1;
if (it->cur_precinct >= it->n_precincts) {
it->cur_precinct = 0;
it->cur_component += 1;
if (it->cur_component >= it->n_components) {
it->cur_component = 0;
it->cur_resolution += 1;
if (it->cur_resolution >= it->n_resolutions) {
it->cur_resolution = 0;
it->cur_layer += 1;
if (it->cur_layer >= it->n_layers) {
it->cur_packet++;
return FALSE;
}
}
}
packet_iterator_changed_resolution_or_component (it);
}
it->cur_packet++;
return TRUE;
}
static gboolean
packet_iterator_next_rlcp (PacketIterator * it)
{
g_return_val_if_fail (it->cur_resolution < it->n_resolutions, FALSE);
if (it->first) {
packet_iterator_changed_resolution_or_component (it);
it->first = FALSE;
return TRUE;
}
it->cur_precinct += 1;
if (it->cur_precinct >= it->n_precincts) {
it->cur_precinct = 0;
it->cur_component += 1;
if (it->cur_component >= it->n_components) {
it->cur_component = 0;
it->cur_layer += 1;
if (it->cur_layer >= it->n_layers) {
it->cur_layer = 0;
it->cur_resolution += 1;
if (it->cur_resolution >= it->n_resolutions) {
it->cur_packet++;
return FALSE;
}
}
}
packet_iterator_changed_resolution_or_component (it);
}
it->cur_packet++;
return TRUE;
}
static gboolean
packet_iterator_next_rpcl (PacketIterator * it)
{
g_return_val_if_fail (it->cur_resolution < it->n_resolutions, FALSE);
if (it->first) {
packet_iterator_changed_resolution_or_component (it);
it->first = FALSE;
return TRUE;
}
it->cur_layer += 1;
if (it->cur_layer >= it->n_layers) {
it->cur_layer = 0;
/* Loop and advance the position and resolution until
* we find the next precinct
*/
while (TRUE) {
it->cur_component += 1;
if (it->cur_component >= it->n_components) {
it->cur_component = 0;
it->cur_x += it->x_step - (it->cur_x % it->x_step);
if (it->cur_x >= it->tx1) {
it->cur_x = it->tx0;
it->cur_y += it->y_step - (it->cur_y % it->y_step);
if (it->cur_y >= it->ty1) {
it->cur_y = it->ty0;
it->cur_resolution += 1;
if (it->cur_resolution >= it->n_resolutions) {
it->cur_packet++;
return FALSE;
}
}
}
}
packet_iterator_changed_resolution_or_component (it);
if (((it->cur_y % (it->yr * it->two_ppy * it->two_nl_r) == 0)
|| (it->cur_y == it->ty0
&& ((it->try0 * it->two_nl_r) %
(it->two_ppy * it->two_nl_r) != 0)))
&& ((it->cur_x % (it->xr * it->two_ppx * it->two_nl_r) == 0)
|| (it->cur_x == it->tx0
&& ((it->trx0 * it->two_nl_r) %
(it->two_ppx * it->two_nl_r) != 0)))) {
gint k;
k = (((it->cur_x + it->xr * it->two_nl_r - 1) /
(it->xr * it->two_nl_r)) / it->two_ppx) -
(it->trx0 / it->two_ppx) +
it->n_precincts_w *
(((it->cur_y + it->yr * it->two_nl_r - 1) /
(it->yr * it->two_nl_r)) / it->two_ppy);
g_assert (k < it->n_precincts);
it->cur_precinct = k;
break;
}
}
}
it->cur_packet++;
return TRUE;
}
static gboolean
packet_iterator_next_pcrl (PacketIterator * it)
{
g_return_val_if_fail (it->cur_resolution < it->n_resolutions, FALSE);
if (it->first) {
it->first = FALSE;
return TRUE;
}
it->cur_layer += 1;
if (it->cur_layer >= it->n_layers) {
it->cur_layer = 0;
/* Loop and advance the position and resolution until
* we find the next precinct
*/
while (TRUE) {
it->cur_resolution += 1;
if (it->cur_resolution >= it->n_resolutions) {
it->cur_resolution = 0;
it->cur_component += 1;
if (it->cur_component >= it->n_components) {
it->cur_x += it->x_step - (it->cur_x % it->x_step);
if (it->cur_x >= it->tx1) {
it->cur_x = it->tx0;
it->cur_y += it->y_step - (it->cur_y % it->y_step);
if (it->cur_y >= it->ty1) {
it->cur_packet++;
return FALSE;
}
}
}
}
packet_iterator_changed_resolution_or_component (it);
if (((it->cur_y % (it->yr * it->two_ppy * it->two_nl_r) == 0)
|| (it->cur_y == it->ty0
&& ((it->try0 * it->two_nl_r) %
(it->two_ppy * it->two_nl_r) != 0)))
&& ((it->cur_x % (it->xr * it->two_ppx * it->two_nl_r) == 0)
|| (it->cur_x == it->tx0
&& ((it->trx0 * it->two_nl_r) %
(it->two_ppx * it->two_nl_r) != 0)))) {
gint k;
k = (((it->cur_x + it->xr * it->two_nl_r - 1) /
(it->xr * it->two_nl_r)) / it->two_ppx) -
(it->trx0 / it->two_ppx) +
it->n_precincts_w *
(((it->cur_y + it->yr * it->two_nl_r - 1) /
(it->yr * it->two_nl_r)) / it->two_ppy);
g_assert (k < it->n_precincts);
it->cur_precinct = k;
break;
}
}
}
it->cur_packet++;
return TRUE;
}
static gboolean
packet_iterator_next_cprl (PacketIterator * it)
{
g_return_val_if_fail (it->cur_resolution < it->n_resolutions, FALSE);
if (it->first) {
packet_iterator_changed_resolution_or_component (it);
it->first = FALSE;
return TRUE;
}
it->cur_layer += 1;
if (it->cur_layer >= it->n_layers) {
it->cur_layer = 0;
/* Loop and advance the position and resolution until
* we find the next precinct
*/
while (TRUE) {
it->cur_resolution += 1;
if (it->cur_resolution >= it->n_resolutions) {
it->cur_resolution = 0;
it->cur_x += it->x_step - (it->cur_x % it->x_step);
if (it->cur_x >= it->tx1) {
it->cur_x = it->tx0;
it->cur_y += it->y_step - (it->cur_y % it->y_step);
if (it->cur_y >= it->ty1) {
it->cur_y = it->ty0;
it->cur_component += 1;
if (it->cur_component >= it->n_components) {
it->cur_packet++;
return FALSE;
}
}
}
}
packet_iterator_changed_resolution_or_component (it);
if (((it->cur_y % (it->yr * it->two_ppy * it->two_nl_r) == 0)
|| (it->cur_y == it->ty0
&& ((it->try0 * it->two_nl_r) %
(it->two_ppy * it->two_nl_r) != 0)))
&& ((it->cur_x % (it->xr * it->two_ppx * it->two_nl_r) == 0)
|| (it->cur_x == it->tx0
&& ((it->trx0 * it->two_nl_r) %
(it->two_ppx * it->two_nl_r) != 0)))) {
gint k;
k = (((it->cur_x + it->xr * it->two_nl_r - 1) /
(it->xr * it->two_nl_r)) / it->two_ppx) -
(it->trx0 / it->two_ppx) +
it->n_precincts_w *
(((it->cur_y + it->yr * it->two_nl_r - 1) /
(it->yr * it->two_nl_r)) / it->two_ppy);
g_assert (k < it->n_precincts);
it->cur_precinct = k;
break;
}
}
}
it->cur_packet++;
return TRUE;
}
static GstFlowReturn
init_packet_iterator (GstJP2kDecimator * self, PacketIterator * it,
const MainHeader * header, const Tile * tile)
{
ProgressionOrder order;
gint i, j;
memset (it, 0, sizeof (PacketIterator));
it->header = header;
it->tile = tile;
it->first = TRUE;
it->n_layers = (tile->cod) ? tile->cod->n_layers : header->cod.n_layers;
it->n_resolutions =
1 +
((tile->cod) ? tile->cod->n_decompositions : header->cod.
n_decompositions);
it->n_components = header->siz.n_components;
it->tx0 = tile->tx0;
it->tx1 = tile->tx1;
it->ty0 = tile->ty0;
it->ty1 = tile->ty1;
it->cur_x = it->tx0;
it->cur_y = it->ty0;
/* Calculate the step sizes for the position-dependent progression orders */
it->x_step = it->y_step = 0;
for (i = 0; i < it->n_components; i++) {
gint xr, yr;
xr = header->siz.components[i].xr;
yr = header->siz.components[i].yr;
for (j = 0; j < it->n_resolutions; j++) {
gint xs, ys;
guint8 PPx, PPy;
if (tile->cod) {
PPx = (tile->cod->PPx) ? tile->cod->PPx[j] : 15;
PPy = (tile->cod->PPy) ? tile->cod->PPy[j] : 15;
} else {
PPx = (header->cod.PPx) ? header->cod.PPx[j] : 15;
PPy = (header->cod.PPy) ? header->cod.PPy[j] : 15;
}
xs = xr * (1 << (PPx + it->n_resolutions - j - 1));
ys = yr * (1 << (PPy + it->n_resolutions - j - 1));
if (it->x_step == 0 || it->x_step > xs)
it->x_step = xs;
if (it->y_step == 0 || it->y_step > ys)
it->y_step = ys;
}
}
order =
(tile->cod) ? tile->cod->progression_order : header->cod.
progression_order;
if (order == PROGRESSION_ORDER_LRCP) {
it->next = packet_iterator_next_lrcp;
} else if (order == PROGRESSION_ORDER_RLCP) {
it->next = packet_iterator_next_rlcp;
} else if (order == PROGRESSION_ORDER_RPCL) {
it->next = packet_iterator_next_rpcl;
} else if (order == PROGRESSION_ORDER_PCRL) {
it->next = packet_iterator_next_pcrl;
} else if (order == PROGRESSION_ORDER_CPRL) {
it->next = packet_iterator_next_cprl;
} else {
GST_ERROR_OBJECT (self, "Progression order %d not supported", order);
return GST_FLOW_ERROR;
}
return GST_FLOW_OK;
}
static GstFlowReturn
parse_siz (GstJP2kDecimator * self, GstByteReader * reader,
ImageSize * siz, guint16 length)
{
gint i;
if (length < 38) {
GST_ERROR_OBJECT (self, "Invalid SIZ marker");
return GST_FLOW_ERROR;
}
siz->caps = gst_byte_reader_get_uint16_be_unchecked (reader);
siz->x = gst_byte_reader_get_uint32_be_unchecked (reader);
siz->y = gst_byte_reader_get_uint32_be_unchecked (reader);
siz->xo = gst_byte_reader_get_uint32_be_unchecked (reader);
siz->yo = gst_byte_reader_get_uint32_be_unchecked (reader);
siz->xt = gst_byte_reader_get_uint32_be_unchecked (reader);
siz->yt = gst_byte_reader_get_uint32_be_unchecked (reader);
siz->xto = gst_byte_reader_get_uint32_be_unchecked (reader);
siz->yto = gst_byte_reader_get_uint32_be_unchecked (reader);
siz->n_components = gst_byte_reader_get_uint16_be_unchecked (reader);
if (length < 38 + 3 * siz->n_components) {
GST_ERROR_OBJECT (self, "Invalid SIZ marker");
return GST_FLOW_ERROR;
}
siz->components = g_new (ComponentSize, siz->n_components);
for (i = 0; i < siz->n_components; i++) {
siz->components[i].s = gst_byte_reader_get_uint8_unchecked (reader);
siz->components[i].xr = gst_byte_reader_get_uint8_unchecked (reader);
siz->components[i].yr = gst_byte_reader_get_uint8_unchecked (reader);
}
return GST_FLOW_OK;
}
static guint
sizeof_siz (GstJP2kDecimator * self, const ImageSize * siz)
{
return 2 + 38 + 3 * siz->n_components;
}
static void
reset_siz (GstJP2kDecimator * self, ImageSize * siz)
{
if (siz->components)
g_free (siz->components);
memset (siz, 0, sizeof (ImageSize));
}
static GstFlowReturn
write_siz (GstJP2kDecimator * self, GstByteWriter * writer,
const ImageSize * siz)
{
gint i;
if (!gst_byte_writer_ensure_free_space (writer,
2 + 38 + 3 * siz->n_components)) {
GST_ERROR_OBJECT (self, "Could not ensure free space");
return GST_FLOW_ERROR;
}
gst_byte_writer_put_uint16_be_unchecked (writer, MARKER_SIZ);
gst_byte_writer_put_uint16_be_unchecked (writer, 38 + 3 * siz->n_components);
gst_byte_writer_put_uint16_be_unchecked (writer, siz->caps);
gst_byte_writer_put_uint32_be_unchecked (writer, siz->x);
gst_byte_writer_put_uint32_be_unchecked (writer, siz->y);
gst_byte_writer_put_uint32_be_unchecked (writer, siz->xo);
gst_byte_writer_put_uint32_be_unchecked (writer, siz->yo);
gst_byte_writer_put_uint32_be_unchecked (writer, siz->xt);
gst_byte_writer_put_uint32_be_unchecked (writer, siz->yt);
gst_byte_writer_put_uint32_be_unchecked (writer, siz->xto);
gst_byte_writer_put_uint32_be_unchecked (writer, siz->yto);
gst_byte_writer_put_uint16_be_unchecked (writer, siz->n_components);
for (i = 0; i < siz->n_components; i++) {
gst_byte_writer_put_uint8_unchecked (writer, siz->components[i].s);
gst_byte_writer_put_uint8_unchecked (writer, siz->components[i].xr);
gst_byte_writer_put_uint8_unchecked (writer, siz->components[i].yr);
}
return GST_FLOW_OK;
}
static GstFlowReturn
parse_cod (GstJP2kDecimator * self, GstByteReader * reader,
CodingStyleDefault * cod, guint16 length)
{
guint8 Scod;
if (length < 12) {
GST_ERROR_OBJECT (self, "Invalid COD marker");
return GST_FLOW_ERROR;
}
Scod = gst_byte_reader_get_uint8_unchecked (reader);
cod->sop = !!(Scod & 0x02);
cod->eph = !!(Scod & 0x04);
/* SGcod */
cod->progression_order = gst_byte_reader_get_uint8_unchecked (reader);
cod->n_layers = gst_byte_reader_get_uint16_be_unchecked (reader);
cod->multi_component_transform = gst_byte_reader_get_uint8_unchecked (reader);
/* SPcod */
cod->n_decompositions = gst_byte_reader_get_uint8_unchecked (reader);
cod->xcb = gst_byte_reader_get_uint8_unchecked (reader) + 2;
cod->ycb = gst_byte_reader_get_uint8_unchecked (reader) + 2;
cod->code_block_style = gst_byte_reader_get_uint8_unchecked (reader);
cod->transformation = gst_byte_reader_get_uint8_unchecked (reader);
if ((Scod & 0x01)) {
gint i;
/* User defined precincts */
if (length < 12 + (Scod & 0x01) * (cod->n_decompositions + 1)) {
GST_ERROR_OBJECT (self, "Invalid COD marker");
return GST_FLOW_ERROR;
}
cod->PPx = g_new (guint8, (cod->n_decompositions + 1));
for (i = 0; i < cod->n_decompositions + 1; i++) {
guint8 v = gst_byte_reader_get_uint8_unchecked (reader);
cod->PPx[i] = (v & 0x0f);
cod->PPy[i] = (v >> 4);
}
}
return GST_FLOW_OK;
}
static guint
sizeof_cod (GstJP2kDecimator * self, const CodingStyleDefault * cod)
{
return 2 + 12 + (cod->PPx ? (cod->n_decompositions + 1) : 0);
}
static void
reset_cod (GstJP2kDecimator * self, CodingStyleDefault * cod)
{
g_free (cod->PPx);
g_free (cod->PPy);
memset (cod, 0, sizeof (CodingStyleDefault));
}
static GstFlowReturn
write_cod (GstJP2kDecimator * self, GstByteWriter * writer,
const CodingStyleDefault * cod)
{
guint tmp;
tmp = 12 + (cod->PPx ? (1 + cod->n_decompositions) : 0);
if (!gst_byte_writer_ensure_free_space (writer, tmp)) {
GST_ERROR_OBJECT (self, "Could not ensure free space");
return GST_FLOW_ERROR;
}
gst_byte_writer_put_uint16_be_unchecked (writer, MARKER_COD);
gst_byte_writer_put_uint16_be_unchecked (writer, tmp);
/* Scod */
tmp =
(cod->PPx ? 0x01 : 0x00) | (cod->sop ? 0x02 : 0x00) | (cod->
eph ? 0x04 : 0x00);
gst_byte_writer_put_uint8_unchecked (writer, tmp);
/* SGcod */
gst_byte_writer_put_uint8_unchecked (writer, cod->progression_order);
gst_byte_writer_put_uint16_be_unchecked (writer, cod->n_layers);
gst_byte_writer_put_uint8_unchecked (writer, cod->multi_component_transform);
/* SPcod */
gst_byte_writer_put_uint8_unchecked (writer, cod->n_decompositions);
gst_byte_writer_put_uint8_unchecked (writer, cod->xcb - 2);
gst_byte_writer_put_uint8_unchecked (writer, cod->ycb - 2);
gst_byte_writer_put_uint8_unchecked (writer, cod->code_block_style);
gst_byte_writer_put_uint8_unchecked (writer, cod->transformation);
if (cod->PPx) {
gint i;
for (i = 0; i < cod->n_decompositions + 1; i++) {
tmp = (cod->PPx[i]) | (cod->PPy[i] << 4);
gst_byte_writer_put_uint8_unchecked (writer, tmp);
}
}
return GST_FLOW_OK;
}
static GstFlowReturn
parse_plt (GstJP2kDecimator * self, GstByteReader * reader,
PacketLengthTilePart * plt, guint length)
{
guint32 n;
guint8 b = 0;
gint i;
if (length < 3) {
GST_ERROR_OBJECT (self, "Invalid PLT");
return GST_FLOW_ERROR;
}
plt->index = gst_byte_reader_get_uint8_unchecked (reader);
plt->packet_lengths = g_array_new (FALSE, FALSE, sizeof (guint32));
length -= 3;
n = 0;
for (i = 0; i < length; i++) {
b = gst_byte_reader_get_uint8_unchecked (reader);
if ((n & 0xfe000000)) {
GST_ERROR_OBJECT (self, "PLT element overflow");
return GST_FLOW_ERROR;
}
n = (n << 7) | (b & 0x7f);
if ((b & 0x80) == 0x00) {
g_array_append_val (plt->packet_lengths, n);
n = 0;
}
}
if ((b & 0x80) != 0x00) {
GST_ERROR_OBJECT (self, "Truncated PLT");
return GST_FLOW_ERROR;
}
return GST_FLOW_OK;
}
static guint
sizeof_plt (GstJP2kDecimator * self, const PacketLengthTilePart * plt)
{
guint size = 2 + 3;
gint i, n;
n = plt->packet_lengths->len;
for (i = 0; i < n; i++) {
guint32 len = g_array_index (plt->packet_lengths, guint32, i);
if (len < (1 << 7)) {
size += 1;
} else if (len < (1 << 14)) {
size += 2;
} else if (len < (1 << 21)) {
size += 3;
} else if (len < (1 << 28)) {
size += 4;
} else {
size += 5;
}
}
return size;
}
static void
reset_plt (GstJP2kDecimator * self, PacketLengthTilePart * plt)
{
if (plt->packet_lengths)
g_array_free (plt->packet_lengths, TRUE);
memset (plt, 0, sizeof (PacketLengthTilePart));
}
static GstFlowReturn
write_plt (GstJP2kDecimator * self, GstByteWriter * writer,
const PacketLengthTilePart * plt)
{
gint i, n;
guint plt_start_pos, plt_end_pos;
if (!gst_byte_writer_ensure_free_space (writer, 2 + 2 + 1)) {
GST_ERROR_OBJECT (self, "Could not ensure free space");
return GST_FLOW_ERROR;
}
gst_byte_writer_put_uint16_be_unchecked (writer, MARKER_PLT);
plt_start_pos = gst_byte_writer_get_pos (writer);
gst_byte_writer_put_uint16_be_unchecked (writer, 0);
gst_byte_writer_put_uint8_unchecked (writer, plt->index);
n = plt->packet_lengths->len;
for (i = 0; i < n; i++) {
guint32 len = g_array_index (plt->packet_lengths, guint32, i);
/* FIXME: Write multiple plt here */
if (gst_byte_writer_get_pos (writer) - plt_start_pos > 65535 - 5) {
GST_ERROR_OBJECT (self, "Too big PLT");
return GST_FLOW_ERROR;
}
if (len < (1 << 7)) {
if (!gst_byte_writer_ensure_free_space (writer, 1)) {
GST_ERROR_OBJECT (self, "Could not ensure free space");
return GST_FLOW_ERROR;
}
gst_byte_writer_put_uint8_unchecked (writer, (0x00 | (len & 0x7f)));
} else if (len < (1 << 14)) {
if (!gst_byte_writer_ensure_free_space (writer, 2)) {
GST_ERROR_OBJECT (self, "Could not ensure free space");
return GST_FLOW_ERROR;
}
gst_byte_writer_put_uint8_unchecked (writer,
(0x80 | ((len >> 7) & 0x7f)));
gst_byte_writer_put_uint8_unchecked (writer, (0x00 | (len & 0x7f)));
} else if (len < (1 << 21)) {
if (!gst_byte_writer_ensure_free_space (writer, 3)) {
GST_ERROR_OBJECT (self, "Could not ensure free space");
return GST_FLOW_ERROR;
}
gst_byte_writer_put_uint8_unchecked (writer,
(0x80 | ((len >> 14) & 0x7f)));
gst_byte_writer_put_uint8_unchecked (writer,
(0x80 | ((len >> 7) & 0x7f)));
gst_byte_writer_put_uint8_unchecked (writer, (0x00 | (len & 0x7f)));
} else if (len < (1 << 28)) {
if (!gst_byte_writer_ensure_free_space (writer, 4)) {
GST_ERROR_OBJECT (self, "Could not ensure free space");
return GST_FLOW_ERROR;
}
gst_byte_writer_put_uint8_unchecked (writer,
(0x80 | ((len >> 21) & 0x7f)));
gst_byte_writer_put_uint8_unchecked (writer,
(0x80 | ((len >> 14) & 0x7f)));
gst_byte_writer_put_uint8_unchecked (writer,
(0x80 | ((len >> 7) & 0x7f)));
gst_byte_writer_put_uint8_unchecked (writer, (0x00 | (len & 0x7f)));
} else {
if (!gst_byte_writer_ensure_free_space (writer, 5)) {
GST_ERROR_OBJECT (self, "Could not ensure free space");
return GST_FLOW_ERROR;
}
gst_byte_writer_put_uint8_unchecked (writer,
(0x80 | ((len >> 28) & 0x7f)));
gst_byte_writer_put_uint8_unchecked (writer,
(0x80 | ((len >> 21) & 0x7f)));
gst_byte_writer_put_uint8_unchecked (writer,
(0x80 | ((len >> 14) & 0x7f)));
gst_byte_writer_put_uint8_unchecked (writer,
(0x80 | ((len >> 7) & 0x7f)));
gst_byte_writer_put_uint8_unchecked (writer, (0x00 | (len & 0x7f)));
}
}
plt_end_pos = gst_byte_writer_get_pos (writer);
gst_byte_writer_set_pos (writer, plt_start_pos);
if (!gst_byte_writer_put_uint16_be (writer, plt_end_pos - plt_start_pos)) {
GST_ERROR_OBJECT (self, "Not enough space to write plt size");
return GST_FLOW_ERROR;
}
gst_byte_writer_set_pos (writer, plt_end_pos);
return GST_FLOW_OK;
}
static GstFlowReturn
parse_packet (GstJP2kDecimator * self, GstByteReader * reader,
const MainHeader * header, Tile * tile, const PacketIterator * it)
{
GstFlowReturn ret = GST_FLOW_OK;
guint16 marker = 0, length;
guint16 seqno = 0;
guint packet_start_pos;
const guint8 *packet_start_data;
gboolean sop, eph;
PacketLengthTilePart *plt = NULL;
sop = (tile->cod) ? tile->cod->sop : header->cod.sop;
eph = (tile->cod) ? tile->cod->eph : header->cod.eph;
if (tile->plt) {
if (g_list_length (tile->plt) > 1) {
GST_ERROR_OBJECT (self,
"Only a single PLT per tile is supported currently");
ret = GST_FLOW_ERROR;
goto done;
}
plt = tile->plt->data;
}
if (plt) {
guint32 length;
Packet *p;
if (plt->packet_lengths->len <= it->cur_packet) {
GST_ERROR_OBJECT (self, "Truncated PLT");
ret = GST_FLOW_ERROR;
goto done;
}
length = g_array_index (plt->packet_lengths, guint32, it->cur_packet);
if (gst_byte_reader_get_remaining (reader) < length) {
GST_ERROR_OBJECT (self, "Truncated file");
ret = GST_FLOW_ERROR;
goto done;
}
p = g_new0 (Packet, 1);
/* If there is a SOP keep the seqno */
if (sop && length > 6) {
if (!gst_byte_reader_peek_uint16_be (reader, &marker)) {
GST_ERROR_OBJECT (self, "Truncated file");
ret = GST_FLOW_ERROR;
g_free (p);
goto done;
}
if (marker == MARKER_SOP) {
guint16 dummy;
gst_byte_reader_skip_unchecked (reader, 2);
if (!gst_byte_reader_get_uint16_be (reader, &dummy)) {
GST_ERROR_OBJECT (self, "Truncated file");
ret = GST_FLOW_ERROR;
g_free (p);
goto done;
}
if (!gst_byte_reader_get_uint16_be (reader, &seqno)) {
GST_ERROR_OBJECT (self, "Truncated file");
ret = GST_FLOW_ERROR;
g_free (p);
goto done;
}
p->data = gst_byte_reader_peek_data_unchecked (reader);
p->length = length - 6;
p->sop = TRUE;
p->eph = eph;
p->seqno = seqno;
gst_byte_reader_skip_unchecked (reader, length - 6);
}
}
if (!p->data) {
p->data = gst_byte_reader_peek_data_unchecked (reader);
p->length = length;
p->sop = FALSE;
p->eph = eph;
gst_byte_reader_skip_unchecked (reader, length);
}
tile->packets = g_list_prepend (tile->packets, p);
} else if (sop) {
if (!gst_byte_reader_peek_uint16_be (reader, &marker)) {
GST_ERROR_OBJECT (self, "Truncated file");
ret = GST_FLOW_ERROR;
goto done;
}
if (marker != MARKER_SOP) {
GST_ERROR_OBJECT (self, "No SOP marker");
ret = GST_FLOW_EOS;
goto done;
}
gst_byte_reader_skip_unchecked (reader, 2);
if (!gst_byte_reader_get_uint16_be (reader, &length)) {
GST_ERROR_OBJECT (self, "Truncated file");
ret = GST_FLOW_ERROR;
goto done;
}
if (!gst_byte_reader_get_uint16_be (reader, &seqno)) {
GST_ERROR_OBJECT (self, "Truncated file");
ret = GST_FLOW_ERROR;
goto done;
}
packet_start_data = reader->data + reader->byte;
packet_start_pos = gst_byte_reader_get_pos (reader);
/* Find end of packet */
while (TRUE) {
if (!gst_byte_reader_peek_uint16_be (reader, &marker)) {
GST_ERROR_OBJECT (self, "Truncated file");
ret = GST_FLOW_ERROR;
goto done;
}
if (marker == MARKER_SOP || marker == MARKER_EOC || marker == MARKER_SOT) {
Packet *p = g_new (Packet, 1);
p->sop = TRUE;
p->eph = eph;
p->seqno = seqno;
p->data = packet_start_data;
p->length = reader->byte - packet_start_pos;
tile->packets = g_list_prepend (tile->packets, p);
if (marker == MARKER_EOC || marker == MARKER_SOT)
goto done;
else
break;
}
gst_byte_reader_skip_unchecked (reader, 1);
}
} else {
GST_ERROR_OBJECT (self, "Either PLT or SOP are required");
ret = GST_FLOW_ERROR;
goto done;
}
done:
return ret;
}
static guint
sizeof_packet (GstJP2kDecimator * self, const Packet * packet)
{
return packet->length + (packet->sop ? 6 : 0) + ((packet->eph
&& !packet->data) ? 2 : 0);
}
static GstFlowReturn
parse_packets (GstJP2kDecimator * self, GstByteReader * reader,
const MainHeader * header, Tile * tile)
{
guint16 marker = 0;
GstFlowReturn ret = GST_FLOW_OK;
PacketIterator it;
/* Start of data here */
if (!gst_byte_reader_get_uint16_be (reader, &marker)
&& marker != MARKER_SOD) {
GST_ERROR_OBJECT (self, "No SOD in tile");
return GST_FLOW_ERROR;
}
ret = init_packet_iterator (self, &it, header, tile);
if (ret != GST_FLOW_OK)
goto done;
while ((it.next (&it))) {
ret = parse_packet (self, reader, header, tile, &it);
if (ret != GST_FLOW_OK)
goto done;
}
tile->packets = g_list_reverse (tile->packets);
done:
return ret;
}
static GstFlowReturn
parse_tile (GstJP2kDecimator * self, GstByteReader * reader,
const MainHeader * header, Tile * tile)
{
GstFlowReturn ret = GST_FLOW_OK;
guint16 marker = 0, length;
if (!gst_byte_reader_peek_uint16_be (reader, &marker)) {
GST_ERROR_OBJECT (self, "Could not read marker");
ret = GST_FLOW_ERROR;
goto done;
}
if (marker != MARKER_SOT) {
GST_ERROR_OBJECT (self, "Unexpected marker 0x%04x", marker);
ret = GST_FLOW_ERROR;
goto done;
}
/* Skip marker */
gst_byte_reader_skip_unchecked (reader, 2);
if (gst_byte_reader_get_remaining (reader) < 10) {
GST_ERROR_OBJECT (self, "Invalid SOT marker");
ret = GST_FLOW_ERROR;
goto done;
}
length = gst_byte_reader_get_uint16_be_unchecked (reader);
if (length != 10) {
GST_ERROR_OBJECT (self, "Invalid SOT length");
ret = GST_FLOW_ERROR;
goto done;
}
/* FIXME: handle multiple tile parts per tile */
tile->sot.tile_index = gst_byte_reader_get_uint16_be_unchecked (reader);
tile->sot.tile_part_size = gst_byte_reader_get_uint32_be_unchecked (reader);
tile->sot.tile_part_index = gst_byte_reader_get_uint8_unchecked (reader);
tile->sot.n_tile_parts = gst_byte_reader_get_uint8_unchecked (reader);
if (tile->sot.tile_part_size >
2 + 10 + gst_byte_reader_get_remaining (reader)) {
GST_ERROR_OBJECT (self, "Truncated tile part");
ret = GST_FLOW_ERROR;
goto done;
}
tile->tile_x = tile->sot.tile_index % header->n_tiles_x;
tile->tile_y = tile->sot.tile_index / header->n_tiles_x;
tile->tx0 =
MAX (header->siz.xto + tile->tile_x * header->siz.xt, header->siz.xo);
tile->ty0 =
MAX (header->siz.yto + tile->tile_y * header->siz.yt, header->siz.yo);
tile->tx1 =
MIN (header->siz.xto + (tile->tile_x + 1) * header->siz.xt,
header->siz.x);
tile->ty1 =
MIN (header->siz.yto + (tile->tile_y + 1) * header->siz.yt,
header->siz.y);
/* tile part header */
while (TRUE) {
if (!gst_byte_reader_peek_uint16_be (reader, &marker)) {
GST_ERROR_OBJECT (self, "Could not read marker");
ret = GST_FLOW_ERROR;
goto done;
}
/* SOD starts the data */
if (marker == MARKER_SOD) {
break;
}
if ((marker >> 8) != 0xff) {
GST_ERROR_OBJECT (self, "Lost synchronization (0x%04x)", marker);
ret = GST_FLOW_ERROR;
goto done;
}
/* Skip the marker */
gst_byte_reader_skip_unchecked (reader, 2);
/* All markers here have a length */
if (!gst_byte_reader_get_uint16_be (reader, &length)) {
GST_ERROR_OBJECT (self, "Could not read marker length");
ret = GST_FLOW_ERROR;
goto done;
}
if (length < 2 || gst_byte_reader_get_remaining (reader) < length - 2) {
GST_ERROR_OBJECT (self, "Invalid marker length %u (available %u)",
length, gst_byte_reader_get_remaining (reader));
ret = GST_FLOW_ERROR;
goto done;
}
GST_LOG_OBJECT (self,
"Tile header Marker 0x%04x at offset %u with length %u", marker,
gst_byte_reader_get_pos (reader), length);
switch (marker) {
case MARKER_COD:
if (tile->cod) {
GST_ERROR_OBJECT (self, "Only one COD allowed");
ret = GST_FLOW_ERROR;
goto done;
}
tile->cod = g_new0 (CodingStyleDefault, 1);
ret = parse_cod (self, reader, tile->cod, length);
if (ret != GST_FLOW_OK)
goto done;
break;
case MARKER_COC:
GST_ERROR_OBJECT (self, "COC marker not supported yet");
ret = GST_FLOW_ERROR;
goto done;
case MARKER_POC:
GST_ERROR_OBJECT (self, "POC marker not supported yet");
ret = GST_FLOW_ERROR;
goto done;
case MARKER_RGN:
GST_ERROR_OBJECT (self, "RGN marker not supported yet");
ret = GST_FLOW_ERROR;
goto done;
case MARKER_PPT:
GST_ERROR_OBJECT (self, "PPT marker not supported yet");
ret = GST_FLOW_ERROR;
goto done;
case MARKER_PLT:{
PacketLengthTilePart *plt = g_new (PacketLengthTilePart, 1);
ret = parse_plt (self, reader, plt, length);
if (ret != GST_FLOW_OK) {
g_free (plt);
goto done;
}
tile->plt = g_list_append (tile->plt, plt);
break;
}
case MARKER_QCD:
if (tile->qcd != NULL) {
GST_ERROR_OBJECT (self, "Multiple QCD markers");
ret = GST_FLOW_ERROR;
goto done;
}
tile->qcd = g_new (Buffer, 1);
tile->qcd->data = gst_byte_reader_peek_data_unchecked (reader);
tile->qcd->length = length - 2;
gst_byte_reader_skip_unchecked (reader, length - 2);
break;
case MARKER_QCC:{
Buffer *p = g_new (Buffer, 1);
p->data = gst_byte_reader_peek_data_unchecked (reader);
p->length = length - 2;
tile->qcc = g_list_append (tile->qcc, p);
gst_byte_reader_skip_unchecked (reader, length - 2);
break;
}
case MARKER_COM:{
Buffer *p = g_new (Buffer, 1);
p->data = gst_byte_reader_peek_data_unchecked (reader);
p->length = length - 2;
tile->com = g_list_append (tile->com, p);
gst_byte_reader_skip_unchecked (reader, length - 2);
break;
}
default:
GST_DEBUG_OBJECT (self, "Skipping unknown marker 0x%04x", marker);
gst_byte_reader_skip_unchecked (reader, length - 2);
break;
}
}
ret = parse_packets (self, reader, header, tile);
done:
return ret;
}
static guint
sizeof_tile (GstJP2kDecimator * self, const Tile * tile)
{
guint size = 0;
GList *l;
/* SOT */
size += 2 + 2 + 2 + 4 + 1 + 1;
if (tile->cod)
size += sizeof_cod (self, tile->cod);
if (tile->qcd)
size += 2 + 2 + tile->qcd->length;
for (l = tile->qcc; l; l = l->next) {
Buffer *b = l->data;
size += 2 + 2 + b->length;
}
for (l = tile->plt; l; l = l->next) {
PacketLengthTilePart *plt = l->data;
size += sizeof_plt (self, plt);
}
for (l = tile->com; l; l = l->next) {
Buffer *b = l->data;
size += 2 + 2 + b->length;
}
/* SOD */
size += 2;
for (l = tile->packets; l; l = l->next) {
Packet *p = l->data;
size += sizeof_packet (self, p);
}
return size;
}
static void
reset_tile (GstJP2kDecimator * self, const MainHeader * header, Tile * tile)
{
GList *l;
if (tile->cod) {
reset_cod (self, tile->cod);
g_free (tile->cod);
}
for (l = tile->plt; l; l = l->next) {
PacketLengthTilePart *plt = l->data;
reset_plt (self, plt);
g_free (plt);
}
g_list_free (tile->plt);
if (tile->qcd)
g_free (tile->qcd);
for (l = tile->qcc; l; l = l->next) {
g_free (l->data);
}
g_list_free (tile->qcc);
for (l = tile->com; l; l = l->next) {
g_free (l->data);
}
g_list_free (tile->com);
for (l = tile->packets; l; l = l->next) {
Packet *p = l->data;
g_free (p);
}
g_list_free (tile->packets);
memset (tile, 0, sizeof (Tile));
}
static GstFlowReturn
write_marker_buffer (GstJP2kDecimator * self, GstByteWriter * writer,
guint16 marker, const Buffer * buffer)
{
if (!gst_byte_writer_ensure_free_space (writer, 2 + 2 + buffer->length)) {
GST_ERROR_OBJECT (self, "Could not ensure free space");
return GST_FLOW_ERROR;
}
gst_byte_writer_put_uint16_be_unchecked (writer, marker);
gst_byte_writer_put_uint16_be_unchecked (writer, buffer->length + 2);
gst_byte_writer_put_data_unchecked (writer, buffer->data, buffer->length);
return GST_FLOW_OK;
}
static GstFlowReturn
write_packet (GstJP2kDecimator * self, GstByteWriter * writer,
const Packet * packet)
{
guint size = packet->length;
if (packet->sop)
size += 6;
if (packet->eph && !packet->data)
size += 2;
if (!gst_byte_writer_ensure_free_space (writer, size)) {
GST_ERROR_OBJECT (self, "Could not ensure free space");
return GST_FLOW_ERROR;
}
if (packet->sop) {
gst_byte_writer_put_uint16_be_unchecked (writer, MARKER_SOP);
gst_byte_writer_put_uint16_be_unchecked (writer, 4);
gst_byte_writer_put_uint16_be_unchecked (writer, packet->seqno);
}
if (packet->data) {
gst_byte_writer_put_data_unchecked (writer, packet->data, packet->length);
} else {
gst_byte_writer_put_uint8_unchecked (writer, 0);
if (packet->eph) {
gst_byte_writer_put_uint16_be_unchecked (writer, MARKER_EPH);
}
}
return GST_FLOW_OK;
}
static GstFlowReturn
write_tile (GstJP2kDecimator * self, GstByteWriter * writer,
const MainHeader * header, Tile * tile)
{
GList *l;
GstFlowReturn ret = GST_FLOW_OK;
if (!gst_byte_writer_ensure_free_space (writer, 12)) {
GST_ERROR_OBJECT (self, "Could not ensure free space");
return GST_FLOW_ERROR;
}
gst_byte_writer_put_uint16_be_unchecked (writer, MARKER_SOT);
gst_byte_writer_put_uint16_be_unchecked (writer, 10);
gst_byte_writer_put_uint16_be_unchecked (writer, tile->sot.tile_index);
gst_byte_writer_put_uint32_be_unchecked (writer, tile->sot.tile_part_size);
gst_byte_writer_put_uint8_unchecked (writer, tile->sot.tile_part_index);
gst_byte_writer_put_uint8_unchecked (writer, tile->sot.n_tile_parts);
if (tile->cod) {
ret = write_cod (self, writer, tile->cod);
if (ret != GST_FLOW_OK)
goto done;
}
if (tile->qcd) {
ret = write_marker_buffer (self, writer, MARKER_QCD, tile->qcd);
if (ret != GST_FLOW_OK)
goto done;
}
for (l = tile->qcc; l; l = l->next) {
Buffer *p = l->data;
ret = write_marker_buffer (self, writer, MARKER_QCC, p);
if (ret != GST_FLOW_OK)
goto done;
}
for (l = tile->plt; l; l = l->next) {
PacketLengthTilePart *plt = l->data;
ret = write_plt (self, writer, plt);
if (ret != GST_FLOW_OK)
goto done;
}
for (l = tile->com; l; l = l->next) {
Buffer *p = l->data;
ret = write_marker_buffer (self, writer, MARKER_COM, p);
if (ret != GST_FLOW_OK)
goto done;
}
if (!gst_byte_writer_put_uint16_be (writer, MARKER_SOD)) {
GST_ERROR_OBJECT (self, "Could not ensure free space");
ret = GST_FLOW_ERROR;
goto done;
}
for (l = tile->packets; l; l = l->next) {
Packet *p = l->data;
ret = write_packet (self, writer, p);
if (ret != GST_FLOW_OK)
goto done;
}
done:
return ret;
}
GstFlowReturn
parse_main_header (GstJP2kDecimator * self, GstByteReader * reader,
MainHeader * header)
{
GstFlowReturn ret = GST_FLOW_OK;
guint16 marker = 0, length = 0;
/* First SOC */
if (!gst_byte_reader_get_uint16_be (reader, &marker)
|| marker != MARKER_SOC) {
GST_ERROR_OBJECT (self, "Frame does not start with SOC");
ret = GST_FLOW_ERROR;
goto done;
}
while (TRUE) {
if (!gst_byte_reader_peek_uint16_be (reader, &marker)) {
GST_ERROR_OBJECT (self, "Could not read marker");
ret = GST_FLOW_ERROR;
goto done;
}
/* SOT starts the tiles */
if (marker == MARKER_SOT) {
ret = GST_FLOW_OK;
break;
} else if (marker == MARKER_EOC) {
GST_WARNING_OBJECT (self, "EOC marker before SOT");
ret = GST_FLOW_EOS;
goto done;
}
if ((marker >> 8) != 0xff) {
GST_ERROR_OBJECT (self, "Lost synchronization (0x%04x)", marker);
ret = GST_FLOW_ERROR;
goto done;
}
/* Now skip the marker */
gst_byte_reader_skip_unchecked (reader, 2);
/* All markers here have a length */
if (!gst_byte_reader_get_uint16_be (reader, &length)) {
GST_ERROR_OBJECT (self, "Could not read marker length");
ret = GST_FLOW_ERROR;
goto done;
}
if (length < 2 || gst_byte_reader_get_remaining (reader) < length - 2) {
GST_ERROR_OBJECT (self, "Invalid marker length %u (available %u)",
length, gst_byte_reader_get_remaining (reader));
ret = GST_FLOW_ERROR;
goto done;
}
GST_LOG_OBJECT (self, "Marker 0x%04x at offset %u with length %u", marker,
gst_byte_reader_get_pos (reader), length);
switch (marker) {
case MARKER_SIZ:
if (header->siz.n_components != 0) {
GST_ERROR_OBJECT (self, "Multiple SIZ marker");
ret = GST_FLOW_ERROR;
goto done;
}
ret = parse_siz (self, reader, &header->siz, length);
if (ret != GST_FLOW_OK)
goto done;
break;
case MARKER_COD:
if (header->siz.n_components == 0) {
GST_ERROR_OBJECT (self, "Require SIZ before COD");
ret = GST_FLOW_ERROR;
goto done;
}
if (header->cod.n_layers != 0) {
GST_ERROR_OBJECT (self, "Multiple COD");
ret = GST_FLOW_ERROR;
goto done;
}
ret = parse_cod (self, reader, &header->cod, length);
if (ret != GST_FLOW_OK)
goto done;
break;
case MARKER_POC:
GST_ERROR_OBJECT (self, "POC marker not supported yet");
ret = GST_FLOW_ERROR;
goto done;
case MARKER_COC:
GST_ERROR_OBJECT (self, "COC marker not supported yet");
ret = GST_FLOW_ERROR;
goto done;
case MARKER_RGN:
GST_ERROR_OBJECT (self, "RGN marker not supported yet");
ret = GST_FLOW_ERROR;
goto done;
case MARKER_TLM:
GST_ERROR_OBJECT (self, "TLM marker not supported yet");
ret = GST_FLOW_ERROR;
goto done;
case MARKER_PLM:
GST_ERROR_OBJECT (self, "PLM marker not supported yet");
ret = GST_FLOW_ERROR;
goto done;
case MARKER_PPM:
GST_ERROR_OBJECT (self, "PPM marker not supported yet");
ret = GST_FLOW_ERROR;
goto done;
case MARKER_QCD:
if (header->qcd.data != NULL) {
GST_ERROR_OBJECT (self, "Multiple QCD markers");
ret = GST_FLOW_ERROR;
goto done;
}
header->qcd.data = gst_byte_reader_peek_data_unchecked (reader);
header->qcd.length = length - 2;
gst_byte_reader_skip_unchecked (reader, length - 2);
break;
case MARKER_QCC:{
Buffer *p = g_new (Buffer, 1);
p->data = gst_byte_reader_peek_data_unchecked (reader);
p->length = length - 2;
header->qcc = g_list_append (header->qcc, p);
gst_byte_reader_skip_unchecked (reader, length - 2);
break;
}
case MARKER_COM:{
Buffer *p = g_new (Buffer, 1);
p->data = gst_byte_reader_peek_data_unchecked (reader);
p->length = length - 2;
header->com = g_list_append (header->com, p);
gst_byte_reader_skip_unchecked (reader, length - 2);
break;
}
case MARKER_CRG:{
Buffer *p = g_new (Buffer, 1);
p->data = gst_byte_reader_peek_data_unchecked (reader);
p->length = length - 2;
header->crg = g_list_append (header->crg, p);
gst_byte_reader_skip_unchecked (reader, length - 2);
break;
}
default:
GST_DEBUG_OBJECT (self, "Skipping unknown marker 0x%04x", marker);
gst_byte_reader_skip_unchecked (reader, length - 2);
break;
}
}
if (header->siz.n_components == 0 || header->cod.n_layers == 0) {
GST_ERROR_OBJECT (self, "No SIZ or COD before SOT");
return GST_FLOW_ERROR;
}
header->n_tiles_x =
(header->siz.x - header->siz.xto + header->siz.xt - 1) / header->siz.xt;
header->n_tiles_y =
(header->siz.y - header->siz.yto + header->siz.yt - 1) / header->siz.yt;
header->n_tiles = header->n_tiles_x * header->n_tiles_y;
header->tiles = g_malloc0 (sizeof (Tile) * header->n_tiles);
/* now at SOT marker, read the tiles */
{
gint i;
for (i = 0; i < header->n_tiles; i++) {
ret = parse_tile (self, reader, header, &header->tiles[i]);
if (ret != GST_FLOW_OK)
goto done;
}
}
/* now there must be the EOC marker */
if (!gst_byte_reader_get_uint16_be (reader, &marker)
|| marker != MARKER_EOC) {
GST_ERROR_OBJECT (self, "Frame does not end with EOC");
ret = GST_FLOW_ERROR;
goto done;
}
done:
return ret;
}
guint
sizeof_main_header (GstJP2kDecimator * self, const MainHeader * header)
{
guint size = 2;
GList *l;
gint i;
size += sizeof_siz (self, &header->siz);
size += sizeof_cod (self, &header->cod);
size += 2 + 2 + header->qcd.length;
for (l = header->qcc; l; l = l->next) {
Buffer *b = l->data;
size += 2 + 2 + b->length;
}
for (l = header->crg; l; l = l->next) {
Buffer *b = l->data;
size += 2 + 2 + b->length;
}
for (l = header->com; l; l = l->next) {
Buffer *b = l->data;
size += 2 + 2 + b->length;
}
for (i = 0; i < header->n_tiles; i++) {
size += sizeof_tile (self, &header->tiles[i]);
}
/* EOC */
size += 2;
return size;
}
void
reset_main_header (GstJP2kDecimator * self, MainHeader * header)
{
gint i;
GList *l;
if (header->tiles) {
for (i = 0; i < header->n_tiles; i++) {
reset_tile (self, header, &header->tiles[i]);
}
g_free (header->tiles);
}
for (l = header->qcc; l; l = l->next)
g_free (l->data);
g_list_free (header->qcc);
for (l = header->com; l; l = l->next)
g_free (l->data);
g_list_free (header->com);
for (l = header->crg; l; l = l->next)
g_free (l->data);
g_list_free (header->crg);
reset_cod (self, &header->cod);
reset_siz (self, &header->siz);
memset (header, 0, sizeof (MainHeader));
}
GstFlowReturn
write_main_header (GstJP2kDecimator * self, GstByteWriter * writer,
const MainHeader * header)
{
GstFlowReturn ret = GST_FLOW_OK;
GList *l;
gint i;
if (!gst_byte_writer_ensure_free_space (writer, 2)) {
GST_ERROR_OBJECT (self, "Could not ensure free space");
return GST_FLOW_ERROR;
}
gst_byte_writer_put_uint16_be_unchecked (writer, MARKER_SOC);
ret = write_siz (self, writer, &header->siz);
if (ret != GST_FLOW_OK)
goto done;
ret = write_cod (self, writer, &header->cod);
if (ret != GST_FLOW_OK)
goto done;
ret = write_marker_buffer (self, writer, MARKER_QCD, &header->qcd);
if (ret != GST_FLOW_OK)
goto done;
for (l = header->qcc; l; l = l->next) {
Buffer *p = l->data;
ret = write_marker_buffer (self, writer, MARKER_QCC, p);
if (ret != GST_FLOW_OK)
goto done;
}
for (l = header->crg; l; l = l->next) {
Buffer *p = l->data;
ret = write_marker_buffer (self, writer, MARKER_CRG, p);
if (ret != GST_FLOW_OK)
goto done;
}
for (l = header->com; l; l = l->next) {
Buffer *p = l->data;
ret = write_marker_buffer (self, writer, MARKER_COM, p);
if (ret != GST_FLOW_OK)
goto done;
}
for (i = 0; i < header->n_tiles; i++) {
ret = write_tile (self, writer, header, &header->tiles[i]);
if (ret != GST_FLOW_OK)
goto done;
}
if (!gst_byte_writer_ensure_free_space (writer, 2)) {
GST_ERROR_OBJECT (self, "Could not ensure free space");
ret = GST_FLOW_ERROR;
goto done;
}
gst_byte_writer_put_uint16_be_unchecked (writer, MARKER_EOC);
done:
return ret;
}
GstFlowReturn
decimate_main_header (GstJP2kDecimator * self, MainHeader * header)
{
GstFlowReturn ret = GST_FLOW_OK;
gint i;
for (i = 0; i < header->n_tiles; i++) {
Tile *tile = &header->tiles[i];
GList *l;
PacketIterator it;
PacketLengthTilePart *plt = NULL;
if (tile->plt) {
if (g_list_length (tile->plt) > 1) {
GST_ERROR_OBJECT (self, "Multiple PLT per tile not supported yet");
ret = GST_FLOW_ERROR;
goto done;
}
plt = g_new (PacketLengthTilePart, 1);
plt->index = 0;
plt->packet_lengths = g_array_new (FALSE, FALSE, sizeof (guint32));
}
init_packet_iterator (self, &it, header, tile);
l = tile->packets;
while ((it.next (&it))) {
Packet *p;
if (l == NULL) {
GST_ERROR_OBJECT (self, "Not enough packets");
ret = GST_FLOW_ERROR;
g_array_free (plt->packet_lengths, TRUE);
g_free (plt);
goto done;
}
p = l->data;
if ((self->max_layers != 0 && it.cur_layer >= self->max_layers) ||
(self->max_decomposition_levels != -1
&& it.cur_resolution > self->max_decomposition_levels)) {
p->data = NULL;
p->length = 1;
}
if (plt) {
guint32 len = sizeof_packet (self, p);
g_array_append_val (plt->packet_lengths, len);
}
l = l->next;
}
if (plt) {
reset_plt (self, tile->plt->data);
g_free (tile->plt->data);
tile->plt->data = plt;
}
tile->sot.tile_part_size = sizeof_tile (self, tile);
}
done:
return ret;
}
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