GstIsoffParserResult
gst_isoff_sidx_parser_parse (GstSidxParser * parser,
GstByteReader * reader, guint * consumed)
{
GstIsoffParserResult res = GST_ISOFF_PARSER_OK;
gsize remaining;
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;
gsize remaining;
guint32 fourcc;
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);
switch (parser->status) {
case GST_ISOFF_SIDX_PARSER_INIT:
if (gst_byte_reader_get_remaining (&reader) < GST_ISOFF_FULL_BOX_SIZE) {
break;
}
parser->size = gst_byte_reader_get_uint32_be_unchecked (&reader);
fourcc = gst_byte_reader_get_uint32_le_unchecked (&reader);
if (fourcc != GST_ISOFF_FOURCC_SIDX) {
res = GST_ISOFF_PARSER_UNEXPECTED;
gst_byte_reader_set_pos (&reader, 0);
break;
}
if (parser->size == 1) {
if (gst_byte_reader_get_remaining (&reader) < 12) {
gst_byte_reader_set_pos (&reader, 0);
break;
}
parser->size = gst_byte_reader_get_uint64_be_unchecked (&reader);
}
if (parser->size == 0) {
res = GST_ISOFF_PARSER_ERROR;
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 = parser->sidx.earliest_pts =
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);
gst_buffer_unmap (buffer, &info);
return res;
}
