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;
}
static GstFlowReturn
gst_h264_parse_chain (GstPad * pad, GstBuffer * buffer)
{
GstH264Parse *h264parse = GST_H264_PARSE (GST_PAD_PARENT (pad));
if (h264parse->packetized && buffer) {
GstByteReader br;
GstBuffer *sub;
GstFlowReturn ret = GST_FLOW_OK;
guint32 len;
const guint nl = h264parse->nal_length_size;
GST_LOG_OBJECT (h264parse, "processing packet buffer of size %d",
GST_BUFFER_SIZE (buffer));
gst_byte_reader_init_from_buffer (&br, buffer);
while (ret == GST_FLOW_OK && gst_byte_reader_get_remaining (&br)) {
GST_DEBUG_OBJECT (h264parse, "AVC nal offset %d",
gst_byte_reader_get_pos (&br));
if (gst_byte_reader_get_remaining (&br) < nl)
goto parse_failed;
switch (nl) {
case 4:
len = gst_byte_reader_get_uint32_be_unchecked (&br);
break;
case 3:
len = gst_byte_reader_get_uint24_be_unchecked (&br);
break;
case 2:
len = gst_byte_reader_get_uint16_be_unchecked (&br);
break;
case 1:
len = gst_byte_reader_get_uint8_unchecked (&br);
break;
default:
goto not_negotiated;
break;
}
GST_DEBUG_OBJECT (h264parse, "AVC nal size %d", len);
if (gst_byte_reader_get_remaining (&br) < len)
goto parse_failed;
if (h264parse->split_packetized) {
/* convert to NAL aligned byte stream input */
sub = gst_h264_parse_wrap_nal (h264parse, GST_H264_PARSE_FORMAT_BYTE,
(guint8 *) gst_byte_reader_get_data_unchecked (&br, len), len);
/* at least this should make sense */
GST_BUFFER_TIMESTAMP (sub) = GST_BUFFER_TIMESTAMP (buffer);
GST_LOG_OBJECT (h264parse, "pushing NAL of size %d", len);
ret = h264parse->parse_chain (pad, sub);
} else {
/* pass-through: no looking for frames (and nal processing),
* so need to parse to collect data here */
/* NOTE: so if it is really configured to do so,
* pre_push can/will still insert codec-data at intervals,
* which is not really pure pass-through, but anyway ... */
gst_h264_parse_process_nal (h264parse,
GST_BUFFER_DATA (buffer), gst_byte_reader_get_pos (&br) - nl,
gst_byte_reader_get_pos (&br), len);
gst_byte_reader_skip_unchecked (&br, len);
}
}
if (h264parse->split_packetized)
return ret;
}
exit:
/* nal processing in pass-through might have collected stuff;
* ensure nothing happens with this later on */
gst_adapter_clear (h264parse->frame_out);
return h264parse->parse_chain (pad, buffer);
/* ERRORS */
not_negotiated:
{
GST_DEBUG_OBJECT (h264parse, "insufficient data to split input");
return GST_FLOW_NOT_NEGOTIATED;
}
parse_failed:
{
if (h264parse->split_packetized) {
GST_ELEMENT_ERROR (h264parse, STREAM, FAILED, (NULL),
("invalid AVC input data"));
return GST_FLOW_ERROR;
} else {
/* do not meddle to much in this case */
GST_DEBUG_OBJECT (h264parse, "parsing packet failed");
goto exit;
}
}
}
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;
}
