mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-19 06:46:38 +00:00
qtdemux: Separate off stbl sub-atom initialisation
This commit is contained in:
Robert Swain
parent
6a6d2c4970
commit
1f7b878d89
1 changed files with 150 additions and 110 deletions
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@ -271,9 +271,14 @@ struct _QtDemuxStream
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/* stts */
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guint32 n_sample_times;
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/* stss */
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gboolean stss_present;
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guint32 n_sample_syncs;
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/* stps */
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gboolean stps_present;
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guint32 n_sample_partial_syncs;
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/* ctts */
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gboolean ctts_present;
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guint32 n_composition_times;
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};
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enum QtDemuxState
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@ -3734,26 +3739,93 @@ too_many_streams:
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}
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}
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/* collect all samples for @stream by reading the info from @stbl
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*/
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/* initialise bytereaders for stbl sub-atoms */
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static gboolean
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qtdemux_parse_samples (GstQTDemux * qtdemux, QtDemuxStream * stream,
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GNode * stbl)
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qtdemux_stbl_init (GstQTDemux * qtdemux, QtDemuxStream * stream, GNode * stbl)
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{
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int sample_index = 0;
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gint i, j, k;
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int index = 0;
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guint64 timestamp = 0;
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/* time-to-sample atom */
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if (!qtdemux_tree_get_child_by_type_full (stbl, FOURCC_stts, &stream->stts))
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goto corrupt_file;
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/* sample to chunk */
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/* skip version + flags */
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if (!gst_byte_reader_skip (&stream->stts, 1 + 3) ||
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!gst_byte_reader_get_uint32_be (&stream->stts, &stream->n_sample_times))
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goto corrupt_file;
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GST_LOG_OBJECT (qtdemux, "%u timestamp blocks", stream->n_sample_times);
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/* make sure there's enough data */
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if (!qt_atom_parser_has_chunks (&stream->stts, stream->n_sample_times, 2 * 4))
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goto corrupt_file;
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/* sync sample atom */
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stream->stps_present = FALSE;
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if ((stream->stss_present =
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!!qtdemux_tree_get_child_by_type_full (stbl, FOURCC_stss,
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&stream->stss) ? TRUE : FALSE) == TRUE) {
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/* skip version + flags */
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if (!gst_byte_reader_skip (&stream->stss, 1 + 3) ||
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!gst_byte_reader_get_uint32_be (&stream->stss, &stream->n_sample_syncs))
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goto corrupt_file;
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if (stream->n_sample_syncs) {
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/* make sure there's enough data */
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if (!qt_atom_parser_has_chunks (&stream->stss, stream->n_sample_syncs, 4))
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goto corrupt_file;
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}
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/* partial sync sample atom */
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if ((stream->stps_present =
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!!qtdemux_tree_get_child_by_type_full (stbl, FOURCC_stps,
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&stream->stps) ? TRUE : FALSE) == TRUE) {
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/* skip version + flags */
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if (!gst_byte_reader_skip (&stream->stps, 1 + 3) ||
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!gst_byte_reader_get_uint32_be (&stream->stps,
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&stream->n_sample_partial_syncs))
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goto corrupt_file;
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/* if there are no entries, the stss table contains the real
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* sync samples */
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if (stream->n_sample_partial_syncs) {
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/* make sure there's enough data */
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if (!qt_atom_parser_has_chunks (&stream->stps,
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stream->n_sample_partial_syncs, 4))
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goto corrupt_file;
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}
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}
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}
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/* sample-to-chunk atom */
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if (!qtdemux_tree_get_child_by_type_full (stbl, FOURCC_stsc, &stream->stsc))
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goto corrupt_file;
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/* skip version + flags */
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if (!gst_byte_reader_skip (&stream->stsc, 1 + 3) ||
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!gst_byte_reader_get_uint32_be (&stream->stsc,
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&stream->n_samples_per_chunk))
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goto corrupt_file;
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GST_DEBUG_OBJECT (qtdemux, "n_samples_per_chunk %u",
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stream->n_samples_per_chunk);
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/* make sure there's enough data */
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if (!qt_atom_parser_has_chunks (&stream->stsc, stream->n_samples_per_chunk,
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12))
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goto corrupt_file;
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/* sample size */
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if (!qtdemux_tree_get_child_by_type_full (stbl, FOURCC_stsz, &stream->stsz))
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goto corrupt_file;
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/* chunk offsets */
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/* skip version + flags */
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if (!gst_byte_reader_skip (&stream->stsz, 1 + 3) ||
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!gst_byte_reader_get_uint32_be (&stream->stsz, &stream->sample_size))
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goto corrupt_file;
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/* chunk offset */
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if (qtdemux_tree_get_child_by_type_full (stbl, FOURCC_stco, &stream->stco))
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stream->co_size = sizeof (guint32);
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else if (qtdemux_tree_get_child_by_type_full (stbl, FOURCC_co64,
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@ -3762,18 +3834,11 @@ qtdemux_parse_samples (GstQTDemux * qtdemux, QtDemuxStream * stream,
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else
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goto corrupt_file;
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/* sample time */
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if (!qtdemux_tree_get_child_by_type_full (stbl, FOURCC_stts, &stream->stts))
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goto corrupt_file;
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if (!gst_byte_reader_skip (&stream->stsz, 1 + 3) ||
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!gst_byte_reader_get_uint32_be (&stream->stsz, &stream->sample_size))
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goto corrupt_file;
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/* skip version + flags */
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if (!gst_byte_reader_skip (&stream->stco, 1 + 3))
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goto corrupt_file;
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/* chunks_are_chunks == 0 means treat chunks as samples */
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stream->chunks_are_chunks = !stream->sample_size || stream->sampled;
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if (stream->chunks_are_chunks) {
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/* skip number of entries */
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@ -3782,37 +3847,85 @@ qtdemux_parse_samples (GstQTDemux * qtdemux, QtDemuxStream * stream,
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if (!gst_byte_reader_get_uint32_be (&stream->stsz, &stream->n_samples))
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goto corrupt_file;
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/* make sure there are enough data in the stsz atom */
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if (!stream->sample_size) {
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/* different sizes for each sample */
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if (!qt_atom_parser_has_chunks (&stream->stsz, stream->n_samples, 4))
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goto corrupt_file;
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}
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} else {
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/* treat chunks as samples */
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if (!gst_byte_reader_get_uint32_be (&stream->stco, &stream->n_samples))
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goto corrupt_file;
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}
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if (!stream->n_samples)
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goto no_samples;
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if (stream->chunks_are_chunks)
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GST_DEBUG_OBJECT (qtdemux, "stsz sample_size 0");
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if (!stream->n_samples) {
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GST_WARNING_OBJECT (qtdemux, "stream has no samples");
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return FALSE;
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}
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GST_DEBUG_OBJECT (qtdemux, "allocating n_samples %u (%u MB)",
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stream->n_samples,
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(guint) (stream->n_samples * sizeof (QtDemuxSample)) >> 20);
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if (stream->n_samples >=
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QTDEMUX_MAX_SAMPLE_INDEX_SIZE / sizeof (QtDemuxSample))
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goto index_too_big;
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QTDEMUX_MAX_SAMPLE_INDEX_SIZE / sizeof (QtDemuxSample)) {
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GST_WARNING_OBJECT (qtdemux, "not allocating index of %d samples, would "
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"be larger than %uMB (broken file?)", stream->n_samples,
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QTDEMUX_MAX_SAMPLE_INDEX_SIZE >> 20);
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return FALSE;
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}
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stream->samples = g_try_new0 (QtDemuxSample, stream->n_samples);
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if (!stream->samples)
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goto out_of_memory;
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if (!stream->samples) {
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GST_WARNING_OBJECT (qtdemux, "failed to allocate %d samples",
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stream->n_samples);
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return FALSE;
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}
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/* composition time-to-sample */
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if ((stream->ctts_present =
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!!qtdemux_tree_get_child_by_type_full (stbl, FOURCC_ctts,
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&stream->ctts) ? TRUE : FALSE) == TRUE) {
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/* skip version + flags */
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if (!gst_byte_reader_skip (&stream->ctts, 1 + 3)
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|| !gst_byte_reader_get_uint32_be (&stream->ctts,
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&stream->n_composition_times))
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goto corrupt_file;
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/* make sure there's enough data */
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if (!qt_atom_parser_has_chunks (&stream->ctts, stream->n_composition_times,
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4 + 4))
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goto corrupt_file;
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}
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return TRUE;
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corrupt_file:
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{
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GST_ELEMENT_ERROR (qtdemux, STREAM, DECODE,
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(_("This file is corrupt and cannot be played.")), (NULL));
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return FALSE;
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}
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}
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/* collect all samples for @stream by reading the info from @stbl
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*/
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static gboolean
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qtdemux_parse_samples (GstQTDemux * qtdemux, QtDemuxStream * stream)
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{
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int sample_index = 0;
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gint i, j, k;
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int index = 0;
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guint64 timestamp = 0;
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if (stream->chunks_are_chunks) {
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/* set the sample sizes */
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if (stream->sample_size == 0) {
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/* different sizes for each sample */
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if (!qt_atom_parser_has_chunks (&stream->stsz, stream->n_samples, 4))
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goto corrupt_file;
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for (i = 0; i < stream->n_samples; i++) {
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stream->samples[i].size =
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gst_byte_reader_get_uint32_be_unchecked (&stream->stsz);
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@ -3827,21 +3940,6 @@ qtdemux_parse_samples (GstQTDemux * qtdemux, QtDemuxStream * stream,
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}
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}
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/* set the sample offsets in the file */
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if (!gst_byte_reader_skip (&stream->stsc, 1 + 3) ||
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!gst_byte_reader_get_uint32_be (&stream->stsc,
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&stream->n_samples_per_chunk))
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goto corrupt_file;
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if (!stream->chunks_are_chunks) {
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GST_DEBUG_OBJECT (qtdemux, "n_samples_per_chunk %u",
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stream->n_samples_per_chunk);
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}
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if (!qt_atom_parser_has_chunks (&stream->stsc, stream->n_samples_per_chunk,
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12))
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goto corrupt_file;
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for (i = 0; i < stream->n_samples_per_chunk; i++) {
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GstByteReader co_chunk;
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guint32 first_chunk, last_chunk;
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@ -3945,17 +4043,6 @@ done2:
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{
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guint32 time;
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if (!gst_byte_reader_skip (&stream->stts, 4))
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goto corrupt_file;
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if (!gst_byte_reader_get_uint32_be (&stream->stts, &stream->n_sample_times))
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goto corrupt_file;
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GST_LOG_OBJECT (qtdemux, "%u timestamp blocks", stream->n_sample_times);
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/* make sure there's enough data */
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if (!qt_atom_parser_has_chunks (&stream->stts, stream->n_sample_times,
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2 * 4))
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goto corrupt_file;
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timestamp = 0;
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stream->min_duration = 0;
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time = 0;
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@ -4005,22 +4092,10 @@ done2:
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done3:
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{
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/* sample sync, can be NULL */
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if (qtdemux_tree_get_child_by_type_full (stbl, FOURCC_stss, &stream->stss)) {
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/* mark keyframes */
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if (!gst_byte_reader_skip (&stream->stss, 4))
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goto corrupt_file;
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if (!gst_byte_reader_get_uint32_be (&stream->stss,
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&stream->n_sample_syncs))
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goto corrupt_file;
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if (stream->stss_present == TRUE) {
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if (!stream->n_sample_syncs) {
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stream->all_keyframe = TRUE;
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} else {
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/* make sure there's enough data */
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if (!qt_atom_parser_has_chunks (&stream->stss, stream->n_sample_syncs,
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4))
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goto corrupt_file;
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for (i = 0; i < stream->n_sample_syncs; i++) {
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/* note that the first sample is index 1, not 0 */
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index = gst_byte_reader_get_uint32_be_unchecked (&stream->stss);
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@ -4028,23 +4103,12 @@ done3:
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stream->samples[index - 1].keyframe = TRUE;
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}
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}
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/* stps marks partial sync frames like open GOP I-Frames */
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if (qtdemux_tree_get_child_by_type_full (stbl, FOURCC_stps,
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&stream->stps)) {
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if (!gst_byte_reader_skip (&stream->stps, 4))
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goto corrupt_file;
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if (!gst_byte_reader_get_uint32_be (&stream->stps,
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&stream->n_sample_partial_syncs))
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goto corrupt_file;
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if (stream->stps_present == TRUE) {
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/* if there are no entries, the stss table contains the real
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* sync samples */
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if (stream->n_sample_partial_syncs) {
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/* make sure there's enough data */
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if (!qt_atom_parser_has_chunks (&stream->stps,
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stream->n_sample_partial_syncs, 4))
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goto corrupt_file;
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for (i = 0; i < stream->n_sample_partial_syncs; i++) {
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/* note that the first sample is index 1, not 0 */
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index = gst_byte_reader_get_uint32_be_unchecked (&stream->stps);
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@ -4061,20 +4125,13 @@ done3:
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ctts:
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/* composition time to sample */
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if (qtdemux_tree_get_child_by_type_full (stbl, FOURCC_ctts, &stream->ctts)) {
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guint32 n_entries;
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if (stream->ctts_present == TRUE) {
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guint32 count;
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gint32 soffset;
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gst_byte_reader_skip (&stream->ctts, 1 + 3);
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n_entries = gst_byte_reader_get_uint32_be_unchecked (&stream->ctts);
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if (!qt_atom_parser_has_chunks (&stream->ctts, n_entries, 4 + 4))
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goto corrupt_file;
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/* Fill in the pts_offsets */
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index = 0;
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for (i = 0; i < n_entries; i++) {
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for (i = 0; i < stream->n_composition_times; i++) {
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count = gst_byte_reader_get_uint32_be_unchecked (&stream->ctts);
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soffset = gst_byte_reader_get_uint32_be_unchecked (&stream->ctts);
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for (j = 0; j < count; j++) {
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@ -4097,24 +4154,6 @@ corrupt_file:
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(_("This file is corrupt and cannot be played.")), (NULL));
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return FALSE;
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}
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no_samples:
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{
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GST_WARNING_OBJECT (qtdemux, "stream has no samples");
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return FALSE;
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}
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out_of_memory:
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{
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GST_WARNING_OBJECT (qtdemux, "failed to allocate %d samples",
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stream->n_samples);
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return FALSE;
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}
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index_too_big:
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{
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GST_WARNING_OBJECT (qtdemux, "not allocating index of %d samples, would "
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"be larger than %uMB (broken file?)", stream->n_samples,
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QTDEMUX_MAX_SAMPLE_INDEX_SIZE >> 20);
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return FALSE;
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}
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}
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/* collect all segment info for @stream.
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@ -5177,7 +5216,8 @@ qtdemux_parse_trak (GstQTDemux * qtdemux, GNode * trak)
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}
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/* collect sample information */
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if (!qtdemux_parse_samples (qtdemux, stream, stbl))
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if (!qtdemux_stbl_init (qtdemux, stream, stbl) ||
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!qtdemux_parse_samples (qtdemux, stream))
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goto samples_failed;
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/* configure segments */
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