gstreamer/subprojects/gst-plugins-bad/gst-libs/gst/isoff/gstisoff.c

975 lines
26 KiB
C

/*
* 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.
*/
#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;
}