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qtdemux: move error code out of normal flow

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This commit is contained in:
Wim Taymans 2009-12-18 12:44:27 +01:00
parent 4b2b7067b6
commit 3b643817be
1 changed files with 59 additions and 55 deletions
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114
gst/qtdemux/qtdemux.c
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@ -777,17 +777,23 @@ gst_qtdemux_find_index_linear (GstQTDemux * qtdemux, QtDemuxStream * str,
result++;
while (index < str->n_samples - 1) {
if (index + 1 > str->stbl_index
&& !qtdemux_parse_samples (qtdemux, str, index + 1)) {
GST_LOG_OBJECT (qtdemux, "Parsing of index %u failed!", index + 1);
return -1;
}
&& !qtdemux_parse_samples (qtdemux, str, index + 1))
goto parse_failed;
if (media_time < result->timestamp)
break;
index++;
result++;
}
return index;
/* ERRORS */
parse_failed:
{
GST_LOG_OBJECT (qtdemux, "Parsing of index %u failed!", index + 1);
return -1;
}
}
/* find the index of the keyframe needed to decode the sample at @index
@ -1020,8 +1026,6 @@ gst_qtdemux_do_push_seek (GstQTDemux * qtdemux, GstPad * pad, GstEvent * event)
gst_event_parse_seek (event, &rate, &format, &flags,
&cur_type, &cur, &stop_type, &stop);
if (stop_type != GST_SEEK_TYPE_NONE)
goto unsupported_seek;
stop = -1;
/* only forward streaming and seeking is possible */
@ -4118,24 +4122,15 @@ static gboolean
qtdemux_parse_samples (GstQTDemux * qtdemux, QtDemuxStream * stream, guint32 n)
{
gint i, j, k;
int index = 0;
gint index = 0;
if (n >= stream->n_samples) {
GST_LOG_OBJECT (qtdemux,
"Tried to parse up to sample %u but there are only %u samples", n + 1,
stream->n_samples);
GST_ELEMENT_ERROR (qtdemux, STREAM, DECODE,
(_("This file is corrupt and cannot be played.")), (NULL));
return FALSE;
}
if (n >= stream->n_samples)
goto out_of_samples;
if (n <= stream->stbl_index) {
GST_LOG_OBJECT (qtdemux,
"Tried to parse up to sample %u but this sample has already been parsed",
n);
return TRUE;
} else
stream->stbl_index++;
if (n <= stream->stbl_index)
goto already_parsed;
stream->stbl_index++;
if (stream->chunks_are_chunks) {
/* set the sample sizes */
@ -4156,6 +4151,7 @@ qtdemux_parse_samples (GstQTDemux * qtdemux, QtDemuxStream * stream, guint32 n)
}
index = stream->stbl_index;
for (i = stream->stsc_index; i < stream->n_samples_per_chunk; i++) {
if (stream->stsc_chunk_index >= stream->last_chunk
|| stream->stsc_chunk_index < stream->first_chunk) {
@ -4166,12 +4162,10 @@ qtdemux_parse_samples (GstQTDemux * qtdemux, QtDemuxStream * stream, guint32 n)
gst_byte_reader_skip_unchecked (&stream->stsc, 4);
/* chunk numbers are counted from 1 it seems */
if (G_UNLIKELY (stream->first_chunk == 0)) {
GST_ELEMENT_ERROR (qtdemux, STREAM, DECODE,
(_("This file is corrupt and cannot be played.")), (NULL));
return FALSE;
} else
--stream->first_chunk;
if (G_UNLIKELY (stream->first_chunk == 0))
goto corrupt_file;
--stream->first_chunk;
/* the last chunk of each entry is calculated by taking the first chunk
* of the next entry; except if there is no next, where we fake it with
@ -4181,41 +4175,31 @@ qtdemux_parse_samples (GstQTDemux * qtdemux, QtDemuxStream * stream, guint32 n)
} else {
stream->last_chunk =
gst_byte_reader_peek_uint32_be_unchecked (&stream->stsc);
if (G_UNLIKELY (stream->last_chunk == 0)) {
GST_ELEMENT_ERROR (qtdemux, STREAM, DECODE,
(_("This file is corrupt and cannot be played.")), (NULL));
return FALSE;
} else
--stream->last_chunk;
if (G_UNLIKELY (stream->last_chunk == 0))
goto corrupt_file;
--stream->last_chunk;
}
GST_LOG_OBJECT (qtdemux,
"entry %d has first_chunk %d, last_chunk %d, samples_per_chunk %d", i,
stream->first_chunk, stream->last_chunk, stream->samples_per_chunk);
if (G_UNLIKELY (stream->last_chunk < stream->first_chunk)) {
GST_ELEMENT_ERROR (qtdemux, STREAM, DECODE,
(_("This file is corrupt and cannot be played.")), (NULL));
return FALSE;
}
if (G_UNLIKELY (stream->last_chunk < stream->first_chunk))
goto corrupt_file;
if (stream->last_chunk != G_MAXUINT32) {
if (!qt_atom_parser_peek_sub (&stream->stco,
stream->first_chunk * stream->co_size,
(stream->last_chunk - stream->first_chunk) * stream->co_size,
&stream->co_chunk)) {
GST_ELEMENT_ERROR (qtdemux, STREAM, DECODE,
(_("This file is corrupt and cannot be played.")), (NULL));
return FALSE;
}
&stream->co_chunk))
goto corrupt_file;
} else {
stream->co_chunk = stream->stco;
if (!gst_byte_reader_skip (&stream->co_chunk,
stream->first_chunk * stream->co_size)) {
GST_ELEMENT_ERROR (qtdemux, STREAM, DECODE,
(_("This file is corrupt and cannot be played.")), (NULL));
return FALSE;
}
stream->first_chunk * stream->co_size))
goto corrupt_file;
}
stream->stsc_chunk_index = stream->first_chunk;
@ -4225,11 +4209,8 @@ qtdemux_parse_samples (GstQTDemux * qtdemux, QtDemuxStream * stream, guint32 n)
for (j = stream->stsc_chunk_index; j < stream->last_chunk; j++) {
if (!stream->stsc_sample_index
&& !qt_atom_parser_get_offset (&stream->co_chunk, stream->co_size,
&stream->chunk_offset)) {
GST_ELEMENT_ERROR (qtdemux, STREAM, DECODE,
(_("This file is corrupt and cannot be played.")), (NULL));
return FALSE;
}
&stream->chunk_offset))
goto corrupt_file;
for (k = stream->stsc_sample_index; k < stream->samples_per_chunk; k++) {
GST_LOG_OBJECT (qtdemux, "Creating entry %d with offset %"
@ -4411,6 +4392,29 @@ done:
stream->stbl_index = n;
return TRUE;
/* SUCCESS */
already_parsed:
{
GST_LOG_OBJECT (qtdemux,
"Tried to parse up to sample %u but this sample has already been parsed",
n);
return TRUE;
}
/* ERRORS */
out_of_samples:
{
GST_LOG_OBJECT (qtdemux,
"Tried to parse up to sample %u but there are only %u samples", n + 1,
stream->n_samples);
goto corrupt_file;
}
corrupt_file:
{
GST_ELEMENT_ERROR (qtdemux, STREAM, DECODE,
(_("This file is corrupt and cannot be played.")), (NULL));
return FALSE;
}
}
/* collect all segment info for @stream.