gstreamer/gst-libs/gst/isoff/gstisoff.c

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/*
* ISO File Format parsing library
*
* gstisoff.h
*
* Copyright (C) 2015 Samsung Electronics. All rights reserved.
* Author: Thiago Santos <thiagoss@osg.samsung.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 2.1 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 (COPYING); if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
libs: fix API export/import and 'inconsistent linkage' on MSVC For each lib we build export its own API in headers when we're building it, otherwise import the API from the headers. This fixes linker warnings on Windows when building with MSVC. The problem was that we had defined all GST_*_API decorators unconditionally to GST_EXPORT. This was intentional and only supposed to be temporary, but caused linker warnings because we tell the linker that we want to export all symbols even those from externall DLLs, and when the linker notices that they were in external DLLS and not present locally it warns. What we need to do when building each library is: export the library's own symbols and import all other symbols. To this end we define e.g. BUILDING_GST_FOO and then we define the GST_FOO_API decorator either to export or to import symbols depending on whether BUILDING_GST_FOO is set or not. That way external users of each library API automatically get the import. While we're at it, add new GST_API_EXPORT in config.h and use that for GST_*_API decorators instead of GST_EXPORT. The right export define depends on the toolchain and whether we're using -fvisibility=hidden or not, so it's better to set it to the right thing directly than hard-coding a compiler whitelist in the public header. We put the export define into config.h instead of passing it via the command line to the compiler because it might contain spaces and brackets and in the autotools scenario we'd have to pass that through multiple layers of plumbing and Makefile/shell escaping and we're just not going to be *that* lucky. The export define is only used if we're compiling our lib, not by external users of the lib headers, so it's not a problem to put it into config.h Also, this means all .c files of libs need to include config.h to get the export marker defined, so fix up a few that didn't include config.h. This commit depends on a common submodule commit that makes gst-glib-gen.mak add an #include "config.h" to generated enum/marshal .c files for the autotools build. https://bugzilla.gnome.org/show_bug.cgi?id=797185
2018-09-24 10:52:22 +00:00
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstisoff.h"
#include <gst/base/gstbytereader.h>
#include <string.h>
GST_DEBUG_CATEGORY_STATIC (gst_isoff_debug);
#define GST_CAT_DEFAULT gst_isoff_debug
static gboolean initialized = FALSE;
#define INITIALIZE_DEBUG_CATEGORY \
if (!initialized) { \
GST_DEBUG_CATEGORY_INIT (gst_isoff_debug, "isoff", 0, \
"ISO File Format parsing library"); \
initialized = TRUE; \
}
static const guint8 tfrf_uuid[] = {
0xd4, 0x80, 0x7e, 0xf2, 0xca, 0x39, 0x46, 0x95,
0x8e, 0x54, 0x26, 0xcb, 0x9e, 0x46, 0xa7, 0x9f
};
static const guint8 tfxd_uuid[] = {
0x6d, 0x1d, 0x9b, 0x05, 0x42, 0xd5, 0x44, 0xe6,
0x80, 0xe2, 0x14, 0x1d, 0xaf, 0xf7, 0x57, 0xb2
};
/* gst_isoff_parse_box_header:
* @reader:
* @type: type that was found at the current position
* @extended_type: (allow-none): extended type if type=='uuid'
* @header_size: (allow-none): size of the box header (type, extended type and size)
* @size: size of the complete box including type, extended type and size
*
* Advances the byte reader to the start of the box content. To skip
* over the complete box, skip size - header_size bytes.
*
* Returns: TRUE if a box header could be parsed, FALSE if more data is needed
*/
gboolean
gst_isoff_parse_box_header (GstByteReader * reader, guint32 * type,
guint8 extended_type[16], guint * header_size, guint64 * size)
{
guint header_start_offset;
guint32 size_field;
INITIALIZE_DEBUG_CATEGORY;
header_start_offset = gst_byte_reader_get_pos (reader);
if (gst_byte_reader_get_remaining (reader) < 8)
goto not_enough_data;
size_field = gst_byte_reader_get_uint32_be_unchecked (reader);
*type = gst_byte_reader_get_uint32_le_unchecked (reader);
if (size_field == 1) {
if (gst_byte_reader_get_remaining (reader) < 8)
goto not_enough_data;
*size = gst_byte_reader_get_uint64_be_unchecked (reader);
} else {
*size = size_field;
}
if (*type == GST_ISOFF_FOURCC_UUID) {
if (gst_byte_reader_get_remaining (reader) < 16)
goto not_enough_data;
if (extended_type)
memcpy (extended_type, gst_byte_reader_get_data_unchecked (reader, 16),
16);
}
if (header_size)
*header_size = gst_byte_reader_get_pos (reader) - header_start_offset;
return TRUE;
not_enough_data:
gst_byte_reader_set_pos (reader, header_start_offset);
return FALSE;
}
static void
gst_isoff_trun_box_clear (GstTrunBox * trun)
{
if (trun->samples)
g_array_free (trun->samples, TRUE);
}
static void
gst_isoff_tfrf_box_free (GstTfrfBox * tfrf)
{
if (tfrf->entries)
g_array_free (tfrf->entries, TRUE);
g_free (tfrf);
}
static void
gst_isoff_traf_box_clear (GstTrafBox * traf)
{
if (traf->trun)
g_array_free (traf->trun, TRUE);
if (traf->tfrf)
gst_isoff_tfrf_box_free (traf->tfrf);
g_free (traf->tfxd);
traf->trun = NULL;
traf->tfrf = NULL;
traf->tfxd = NULL;
}
static gboolean
gst_isoff_mfhd_box_parse (GstMfhdBox * mfhd, GstByteReader * reader)
{
guint8 version;
guint32 flags;
if (gst_byte_reader_get_remaining (reader) != 8)
return FALSE;
version = gst_byte_reader_get_uint8_unchecked (reader);
if (version != 0)
return FALSE;
flags = gst_byte_reader_get_uint24_be_unchecked (reader);
if (flags != 0)
return FALSE;
mfhd->sequence_number = gst_byte_reader_get_uint32_be_unchecked (reader);
return TRUE;
}
static gboolean
gst_isoff_tfhd_box_parse (GstTfhdBox * tfhd, GstByteReader * reader)
{
memset (tfhd, 0, sizeof (*tfhd));
if (gst_byte_reader_get_remaining (reader) < 4)
return FALSE;
tfhd->version = gst_byte_reader_get_uint8_unchecked (reader);
if (tfhd->version != 0)
return FALSE;
tfhd->flags = gst_byte_reader_get_uint24_be_unchecked (reader);
if (!gst_byte_reader_get_uint32_be (reader, &tfhd->track_id))
return FALSE;
if ((tfhd->flags & GST_TFHD_FLAGS_BASE_DATA_OFFSET_PRESENT) &&
!gst_byte_reader_get_uint64_be (reader, &tfhd->base_data_offset))
return FALSE;
if ((tfhd->flags & GST_TFHD_FLAGS_SAMPLE_DESCRIPTION_INDEX_PRESENT) &&
!gst_byte_reader_get_uint32_be (reader, &tfhd->sample_description_index))
return FALSE;
if ((tfhd->flags & GST_TFHD_FLAGS_DEFAULT_SAMPLE_DURATION_PRESENT) &&
!gst_byte_reader_get_uint32_be (reader, &tfhd->default_sample_duration))
return FALSE;
if ((tfhd->flags & GST_TFHD_FLAGS_DEFAULT_SAMPLE_SIZE_PRESENT) &&
!gst_byte_reader_get_uint32_be (reader, &tfhd->default_sample_size))
return FALSE;
if ((tfhd->flags & GST_TFHD_FLAGS_DEFAULT_SAMPLE_FLAGS_PRESENT) &&
!gst_byte_reader_get_uint32_be (reader, &tfhd->default_sample_flags))
return FALSE;
return TRUE;
}
static gboolean
gst_isoff_trun_box_parse (GstTrunBox * trun, GstByteReader * reader)
{
gint i;
memset (trun, 0, sizeof (*trun));
if (gst_byte_reader_get_remaining (reader) < 4)
return FALSE;
trun->version = gst_byte_reader_get_uint8_unchecked (reader);
if (trun->version != 0 && trun->version != 1)
return FALSE;
trun->flags = gst_byte_reader_get_uint24_be_unchecked (reader);
if (!gst_byte_reader_get_uint32_be (reader, &trun->sample_count))
return FALSE;
trun->samples =
g_array_sized_new (FALSE, FALSE, sizeof (GstTrunSample),
trun->sample_count);
if ((trun->flags & GST_TRUN_FLAGS_DATA_OFFSET_PRESENT) &&
!gst_byte_reader_get_uint32_be (reader, (guint32 *) & trun->data_offset))
return FALSE;
if ((trun->flags & GST_TRUN_FLAGS_FIRST_SAMPLE_FLAGS_PRESENT) &&
!gst_byte_reader_get_uint32_be (reader, &trun->first_sample_flags))
return FALSE;
for (i = 0; i < trun->sample_count; i++) {
GstTrunSample sample = { 0, };
if ((trun->flags & GST_TRUN_FLAGS_SAMPLE_DURATION_PRESENT) &&
!gst_byte_reader_get_uint32_be (reader, &sample.sample_duration))
goto error;
if ((trun->flags & GST_TRUN_FLAGS_SAMPLE_SIZE_PRESENT) &&
!gst_byte_reader_get_uint32_be (reader, &sample.sample_size))
goto error;
if ((trun->flags & GST_TRUN_FLAGS_SAMPLE_FLAGS_PRESENT) &&
!gst_byte_reader_get_uint32_be (reader, &sample.sample_flags))
goto error;
if ((trun->flags & GST_TRUN_FLAGS_SAMPLE_COMPOSITION_TIME_OFFSETS_PRESENT)
&& !gst_byte_reader_get_uint32_be (reader,
&sample.sample_composition_time_offset.u))
goto error;
g_array_append_val (trun->samples, sample);
}
return TRUE;
error:
gst_isoff_trun_box_clear (trun);
return FALSE;
}
static gboolean
gst_isoff_tfdt_box_parse (GstTfdtBox * tfdt, GstByteReader * reader)
{
gint8 version;
memset (tfdt, 0, sizeof (*tfdt));
if (gst_byte_reader_get_remaining (reader) < 4)
return FALSE;
version = gst_byte_reader_get_uint8_unchecked (reader);
if (!gst_byte_reader_skip (reader, 3))
return FALSE;
if (version == 1) {
if (!gst_byte_reader_get_uint64_be (reader, &tfdt->decode_time))
return FALSE;
} else {
guint32 dec_time = 0;
if (!gst_byte_reader_get_uint32_be (reader, &dec_time))
return FALSE;
tfdt->decode_time = dec_time;
}
return TRUE;
}
static gboolean
gst_isoff_tfxd_box_parse (GstTfxdBox * tfxd, GstByteReader * reader)
{
guint8 version;
guint32 flags = 0;
guint64 absolute_time = 0;
guint64 absolute_duration = 0;
memset (tfxd, 0, sizeof (*tfxd));
if (gst_byte_reader_get_remaining (reader) < 4)
return FALSE;
if (!gst_byte_reader_get_uint8 (reader, &version)) {
GST_ERROR ("Error getting box's version field");
return FALSE;
}
if (!gst_byte_reader_get_uint24_be (reader, &flags)) {
GST_ERROR ("Error getting box's flags field");
return FALSE;
}
tfxd->version = version;
tfxd->flags = flags;
if (gst_byte_reader_get_remaining (reader) < ((version & 0x01) ? 16 : 8))
return FALSE;
if (version & 0x01) {
gst_byte_reader_get_uint64_be (reader, &absolute_time);
gst_byte_reader_get_uint64_be (reader, &absolute_duration);
} else {
guint32 time = 0;
guint32 duration = 0;
gst_byte_reader_get_uint32_be (reader, &time);
gst_byte_reader_get_uint32_be (reader, &duration);
absolute_time = time;
absolute_duration = duration;
}
tfxd->time = absolute_time;
tfxd->duration = absolute_duration;
return TRUE;
}
static gboolean
gst_isoff_tfrf_box_parse (GstTfrfBox * tfrf, GstByteReader * reader)
{
guint8 version;
guint32 flags = 0;
guint8 fragment_count = 0;
guint8 index = 0;
memset (tfrf, 0, sizeof (*tfrf));
if (gst_byte_reader_get_remaining (reader) < 4)
return FALSE;
if (!gst_byte_reader_get_uint8 (reader, &version)) {
GST_ERROR ("Error getting box's version field");
return FALSE;
}
if (!gst_byte_reader_get_uint24_be (reader, &flags)) {
GST_ERROR ("Error getting box's flags field");
return FALSE;
}
tfrf->version = version;
tfrf->flags = flags;
if (!gst_byte_reader_get_uint8 (reader, &fragment_count))
return FALSE;
tfrf->entries_count = fragment_count;
tfrf->entries =
g_array_sized_new (FALSE, FALSE, sizeof (GstTfrfBoxEntry),
tfrf->entries_count);
for (index = 0; index < fragment_count; index++) {
GstTfrfBoxEntry entry = { 0, };
guint64 absolute_time = 0;
guint64 absolute_duration = 0;
if (gst_byte_reader_get_remaining (reader) < ((version & 0x01) ? 16 : 8))
return FALSE;
if (version & 0x01) {
if (!gst_byte_reader_get_uint64_be (reader, &absolute_time) ||
!gst_byte_reader_get_uint64_be (reader, &absolute_duration)) {
return FALSE;
}
} else {
guint32 time = 0;
guint32 duration = 0;
if (!gst_byte_reader_get_uint32_be (reader, &time) ||
!gst_byte_reader_get_uint32_be (reader, &duration)) {
return FALSE;
}
absolute_time = time;
absolute_duration = duration;
}
entry.time = absolute_time;
entry.duration = absolute_duration;
g_array_append_val (tfrf->entries, entry);
}
return TRUE;
}
static gboolean
gst_isoff_traf_box_parse (GstTrafBox * traf, GstByteReader * reader)
{
gboolean had_tfhd = FALSE;
memset (traf, 0, sizeof (*traf));
traf->trun = g_array_new (FALSE, FALSE, sizeof (GstTrunBox));
g_array_set_clear_func (traf->trun,
(GDestroyNotify) gst_isoff_trun_box_clear);
traf->tfdt.decode_time = GST_CLOCK_TIME_NONE;
while (gst_byte_reader_get_remaining (reader) > 0) {
guint32 fourcc;
guint header_size;
guint64 size;
GstByteReader sub_reader;
guint8 extended_type[16] = { 0, };
if (!gst_isoff_parse_box_header (reader, &fourcc, extended_type,
&header_size, &size))
goto error;
if (gst_byte_reader_get_remaining (reader) < size - header_size)
goto error;
switch (fourcc) {
case GST_ISOFF_FOURCC_TFHD:{
gst_byte_reader_get_sub_reader (reader, &sub_reader,
size - header_size);
if (!gst_isoff_tfhd_box_parse (&traf->tfhd, &sub_reader))
goto error;
had_tfhd = TRUE;
break;
}
case GST_ISOFF_FOURCC_TFDT:{
gst_byte_reader_get_sub_reader (reader, &sub_reader,
size - header_size);
if (!gst_isoff_tfdt_box_parse (&traf->tfdt, &sub_reader))
goto error;
break;
}
case GST_ISOFF_FOURCC_TRUN:{
GstTrunBox trun;
gst_byte_reader_get_sub_reader (reader, &sub_reader,
size - header_size);
if (!gst_isoff_trun_box_parse (&trun, &sub_reader))
goto error;
g_array_append_val (traf->trun, trun);
break;
}
case GST_ISOFF_FOURCC_UUID:{
/* smooth-streaming specific */
if (memcmp (extended_type, tfrf_uuid, 16) == 0) {
traf->tfrf = g_new0 (GstTfrfBox, 1);
gst_byte_reader_get_sub_reader (reader, &sub_reader,
size - header_size);
if (!gst_isoff_tfrf_box_parse (traf->tfrf, &sub_reader))
goto error;
} else if (memcmp (extended_type, tfxd_uuid, 16) == 0) {
traf->tfxd = g_new0 (GstTfxdBox, 1);
gst_byte_reader_get_sub_reader (reader, &sub_reader,
size - header_size);
if (!gst_isoff_tfxd_box_parse (traf->tfxd, &sub_reader))
goto error;
} else {
gst_byte_reader_skip (reader, size - header_size);
}
break;
}
default:
gst_byte_reader_skip (reader, size - header_size);
break;
}
}
if (!had_tfhd)
goto error;
return TRUE;
error:
gst_isoff_traf_box_clear (traf);
return FALSE;
}
GstMoofBox *
gst_isoff_moof_box_parse (GstByteReader * reader)
{
GstMoofBox *moof;
gboolean had_mfhd = FALSE;
GstByteReader sub_reader;
INITIALIZE_DEBUG_CATEGORY;
moof = g_new0 (GstMoofBox, 1);
moof->traf = g_array_new (FALSE, FALSE, sizeof (GstTrafBox));
g_array_set_clear_func (moof->traf,
(GDestroyNotify) gst_isoff_traf_box_clear);
while (gst_byte_reader_get_remaining (reader) > 0) {
guint32 fourcc;
guint header_size;
guint64 size;
if (!gst_isoff_parse_box_header (reader, &fourcc, NULL, &header_size,
&size))
goto error;
if (gst_byte_reader_get_remaining (reader) < size - header_size)
goto error;
switch (fourcc) {
case GST_ISOFF_FOURCC_MFHD:{
gst_byte_reader_get_sub_reader (reader, &sub_reader,
size - header_size);
if (!gst_isoff_mfhd_box_parse (&moof->mfhd, &sub_reader))
goto error;
had_mfhd = TRUE;
break;
}
case GST_ISOFF_FOURCC_TRAF:{
GstTrafBox traf;
gst_byte_reader_get_sub_reader (reader, &sub_reader,
size - header_size);
if (!gst_isoff_traf_box_parse (&traf, &sub_reader))
goto error;
g_array_append_val (moof->traf, traf);
break;
}
default:
gst_byte_reader_skip (reader, size - header_size);
break;
}
}
if (!had_mfhd)
goto error;
return moof;
error:
gst_isoff_moof_box_free (moof);
return NULL;
}
void
gst_isoff_moof_box_free (GstMoofBox * moof)
{
g_array_free (moof->traf, TRUE);
g_free (moof);
}
static gboolean
gst_isoff_mdhd_box_parse (GstMdhdBox * mdhd, GstByteReader * reader)
{
guint8 version;
memset (mdhd, 0, sizeof (*mdhd));
if (gst_byte_reader_get_remaining (reader) < 4)
return FALSE;
version = gst_byte_reader_get_uint8_unchecked (reader);
if (!gst_byte_reader_skip (reader, 3))
return FALSE;
/* skip {creation, modification}_time, we don't have interest */
if (version == 1) {
if (!gst_byte_reader_skip (reader, 16))
return FALSE;
} else {
if (!gst_byte_reader_skip (reader, 8))
return FALSE;
}
if (!gst_byte_reader_get_uint32_be (reader, &mdhd->timescale))
return FALSE;
return TRUE;
}
static gboolean
gst_isoff_hdlr_box_parse (GstHdlrBox * hdlr, GstByteReader * reader)
{
memset (hdlr, 0, sizeof (*hdlr));
if (gst_byte_reader_get_remaining (reader) < 4)
return FALSE;
/* version & flag */
if (!gst_byte_reader_skip (reader, 4))
return FALSE;
/* pre_defined = 0 */
if (!gst_byte_reader_skip (reader, 4))
return FALSE;
if (!gst_byte_reader_get_uint32_le (reader, &hdlr->handler_type))
return FALSE;
return TRUE;
}
static gboolean
gst_isoff_mdia_box_parse (GstMdiaBox * mdia, GstByteReader * reader)
{
gboolean had_mdhd = FALSE, had_hdlr = FALSE;
while (gst_byte_reader_get_remaining (reader) > 0) {
guint32 fourcc;
guint header_size;
guint64 size;
GstByteReader sub_reader;
if (!gst_isoff_parse_box_header (reader, &fourcc, NULL, &header_size,
&size))
return FALSE;
if (gst_byte_reader_get_remaining (reader) < size - header_size)
return FALSE;
switch (fourcc) {
case GST_ISOFF_FOURCC_MDHD:{
gst_byte_reader_get_sub_reader (reader, &sub_reader,
size - header_size);
if (!gst_isoff_mdhd_box_parse (&mdia->mdhd, &sub_reader))
return FALSE;
had_mdhd = TRUE;
break;
}
case GST_ISOFF_FOURCC_HDLR:{
gst_byte_reader_get_sub_reader (reader, &sub_reader,
size - header_size);
if (!gst_isoff_hdlr_box_parse (&mdia->hdlr, &sub_reader))
return FALSE;
had_hdlr = TRUE;
break;
}
default:
gst_byte_reader_skip (reader, size - header_size);
break;
}
}
if (!had_mdhd || !had_hdlr)
return FALSE;
return TRUE;
}
static gboolean
gst_isoff_tkhd_box_parse (GstTkhdBox * tkhd, GstByteReader * reader)
{
guint8 version;
memset (tkhd, 0, sizeof (*tkhd));
if (gst_byte_reader_get_remaining (reader) < 4)
return FALSE;
if (!gst_byte_reader_get_uint8 (reader, &version))
return FALSE;
if (!gst_byte_reader_skip (reader, 3))
return FALSE;
/* skip {creation, modification}_time, we don't have interest */
if (version == 1) {
if (!gst_byte_reader_skip (reader, 16))
return FALSE;
} else {
if (!gst_byte_reader_skip (reader, 8))
return FALSE;
}
if (!gst_byte_reader_get_uint32_be (reader, &tkhd->track_id))
return FALSE;
return TRUE;
}
static gboolean
gst_isoff_trak_box_parse (GstTrakBox * trak, GstByteReader * reader)
{
gboolean had_mdia = FALSE, had_tkhd = FALSE;
while (gst_byte_reader_get_remaining (reader) > 0) {
guint32 fourcc;
guint header_size;
guint64 size;
GstByteReader sub_reader;
if (!gst_isoff_parse_box_header (reader, &fourcc, NULL, &header_size,
&size))
return FALSE;
if (gst_byte_reader_get_remaining (reader) < size - header_size)
return FALSE;
switch (fourcc) {
case GST_ISOFF_FOURCC_MDIA:{
gst_byte_reader_get_sub_reader (reader, &sub_reader,
size - header_size);
if (!gst_isoff_mdia_box_parse (&trak->mdia, &sub_reader))
return FALSE;
had_mdia = TRUE;
break;
}
case GST_ISOFF_FOURCC_TKHD:{
gst_byte_reader_get_sub_reader (reader, &sub_reader,
size - header_size);
if (!gst_isoff_tkhd_box_parse (&trak->tkhd, &sub_reader))
return FALSE;
had_tkhd = TRUE;
break;
}
default:
gst_byte_reader_skip (reader, size - header_size);
break;
}
}
if (!had_tkhd || !had_mdia)
return FALSE;
return TRUE;
}
GstMoovBox *
gst_isoff_moov_box_parse (GstByteReader * reader)
{
GstMoovBox *moov;
gboolean had_trak = FALSE;
moov = g_new0 (GstMoovBox, 1);
moov->trak = g_array_new (FALSE, FALSE, sizeof (GstTrakBox));
while (gst_byte_reader_get_remaining (reader) > 0) {
guint32 fourcc;
guint header_size;
guint64 size;
if (!gst_isoff_parse_box_header (reader, &fourcc, NULL, &header_size,
&size))
goto error;
if (gst_byte_reader_get_remaining (reader) < size - header_size)
goto error;
switch (fourcc) {
case GST_ISOFF_FOURCC_TRAK:{
GstByteReader sub_reader;
GstTrakBox trak;
gst_byte_reader_get_sub_reader (reader, &sub_reader,
size - header_size);
if (!gst_isoff_trak_box_parse (&trak, &sub_reader))
goto error;
had_trak = TRUE;
g_array_append_val (moov->trak, trak);
break;
}
default:
gst_byte_reader_skip (reader, size - header_size);
break;
}
}
if (!had_trak)
goto error;
return moov;
error:
gst_isoff_moov_box_free (moov);
return NULL;
}
void
gst_isoff_moov_box_free (GstMoovBox * moov)
{
g_array_free (moov->trak, TRUE);
g_free (moov);
}
void
gst_isoff_sidx_parser_init (GstSidxParser * parser)
{
parser->status = GST_ISOFF_SIDX_PARSER_INIT;
parser->cumulative_entry_size = 0;
parser->sidx.entries = NULL;
parser->sidx.entries_count = 0;
}
void
gst_isoff_sidx_parser_clear (GstSidxParser * parser)
{
g_free (parser->sidx.entries);
memset (parser, 0, sizeof (*parser));
gst_isoff_sidx_parser_init (parser);
}
static void
gst_isoff_parse_sidx_entry (GstSidxBoxEntry * entry, GstByteReader * reader)
{
guint32 aux;
aux = gst_byte_reader_get_uint32_be_unchecked (reader);
entry->ref_type = aux >> 31;
entry->size = aux & 0x7FFFFFFF;
entry->duration = gst_byte_reader_get_uint32_be_unchecked (reader);
aux = gst_byte_reader_get_uint32_be_unchecked (reader);
entry->starts_with_sap = aux >> 31;
entry->sap_type = ((aux >> 28) & 0x7);
entry->sap_delta_time = aux & 0xFFFFFFF;
}
GstIsoffParserResult
gst_isoff_sidx_parser_parse (GstSidxParser * parser,
GstByteReader * reader, guint * consumed)
{
GstIsoffParserResult res = GST_ISOFF_PARSER_OK;
gsize remaining;
INITIALIZE_DEBUG_CATEGORY;
switch (parser->status) {
case GST_ISOFF_SIDX_PARSER_INIT:
/* Try again once we have enough data for the FullBox header */
if (gst_byte_reader_get_remaining (reader) < 4) {
gst_byte_reader_set_pos (reader, 0);
break;
}
parser->sidx.version = gst_byte_reader_get_uint8_unchecked (reader);
parser->sidx.flags = gst_byte_reader_get_uint24_le_unchecked (reader);
parser->status = GST_ISOFF_SIDX_PARSER_HEADER;
case GST_ISOFF_SIDX_PARSER_HEADER:
remaining = gst_byte_reader_get_remaining (reader);
if (remaining < 12 + (parser->sidx.version == 0 ? 8 : 16)) {
break;
}
parser->sidx.ref_id = gst_byte_reader_get_uint32_be_unchecked (reader);
parser->sidx.timescale = gst_byte_reader_get_uint32_be_unchecked (reader);
if (parser->sidx.version == 0) {
parser->sidx.earliest_pts =
gst_byte_reader_get_uint32_be_unchecked (reader);
parser->sidx.first_offset =
gst_byte_reader_get_uint32_be_unchecked (reader);
} else {
parser->sidx.earliest_pts =
gst_byte_reader_get_uint64_be_unchecked (reader);
parser->sidx.first_offset =
gst_byte_reader_get_uint64_be_unchecked (reader);
}
/* skip 2 reserved bytes */
gst_byte_reader_skip_unchecked (reader, 2);
parser->sidx.entries_count =
gst_byte_reader_get_uint16_be_unchecked (reader);
GST_LOG ("Timescale: %" G_GUINT32_FORMAT, parser->sidx.timescale);
GST_LOG ("Earliest pts: %" G_GUINT64_FORMAT, parser->sidx.earliest_pts);
GST_LOG ("First offset: %" G_GUINT64_FORMAT, parser->sidx.first_offset);
parser->cumulative_pts =
gst_util_uint64_scale_int_round (parser->sidx.earliest_pts,
GST_SECOND, parser->sidx.timescale);
if (parser->sidx.entries_count) {
parser->sidx.entries =
g_malloc (sizeof (GstSidxBoxEntry) * parser->sidx.entries_count);
}
parser->sidx.entry_index = 0;
parser->status = GST_ISOFF_SIDX_PARSER_DATA;
case GST_ISOFF_SIDX_PARSER_DATA:
while (parser->sidx.entry_index < parser->sidx.entries_count) {
GstSidxBoxEntry *entry =
&parser->sidx.entries[parser->sidx.entry_index];
remaining = gst_byte_reader_get_remaining (reader);
if (remaining < 12)
break;
entry->offset = parser->cumulative_entry_size;
entry->pts = parser->cumulative_pts;
gst_isoff_parse_sidx_entry (entry, reader);
entry->duration = gst_util_uint64_scale_int_round (entry->duration,
GST_SECOND, parser->sidx.timescale);
parser->cumulative_entry_size += entry->size;
parser->cumulative_pts += entry->duration;
GST_LOG ("Sidx entry %d) offset: %" G_GUINT64_FORMAT ", pts: %"
GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT " - size %"
G_GUINT32_FORMAT, parser->sidx.entry_index, entry->offset,
GST_TIME_ARGS (entry->pts), GST_TIME_ARGS (entry->duration),
entry->size);
parser->sidx.entry_index++;
}
if (parser->sidx.entry_index == parser->sidx.entries_count)
parser->status = GST_ISOFF_SIDX_PARSER_FINISHED;
else
break;
case GST_ISOFF_SIDX_PARSER_FINISHED:
parser->sidx.entry_index = 0;
res = GST_ISOFF_PARSER_DONE;
break;
}
*consumed = gst_byte_reader_get_pos (reader);
return res;
}
GstIsoffParserResult
gst_isoff_sidx_parser_add_buffer (GstSidxParser * parser, GstBuffer * buffer,
guint * consumed)
{
GstIsoffParserResult res = GST_ISOFF_PARSER_OK;
GstByteReader reader;
GstMapInfo info;
guint32 fourcc;
INITIALIZE_DEBUG_CATEGORY;
if (!gst_buffer_map (buffer, &info, GST_MAP_READ)) {
*consumed = 0;
return GST_ISOFF_PARSER_ERROR;
}
gst_byte_reader_init (&reader, info.data, info.size);
if (parser->status == GST_ISOFF_SIDX_PARSER_INIT) {
if (!gst_isoff_parse_box_header (&reader, &fourcc, NULL, NULL,
&parser->size))
goto done;
if (fourcc != GST_ISOFF_FOURCC_SIDX) {
res = GST_ISOFF_PARSER_UNEXPECTED;
gst_byte_reader_set_pos (&reader, 0);
goto done;
}
if (parser->size == 0) {
res = GST_ISOFF_PARSER_ERROR;
gst_byte_reader_set_pos (&reader, 0);
goto done;
}
/* Try again once we have enough data for the FullBox header */
if (gst_byte_reader_get_remaining (&reader) < 4) {
gst_byte_reader_set_pos (&reader, 0);
goto done;
}
}
res = gst_isoff_sidx_parser_parse (parser, &reader, consumed);
done:
gst_buffer_unmap (buffer, &info);
return res;
}