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+From c4d0f4bbd9a8e97f119a4528b9f4662a6b80922c Mon Sep 17 00:00:00 2001
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+From: Jochen Henneberg <jochen@centricular.com>
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+Date: Tue, 10 Dec 2024 21:34:48 +0100
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+Subject: [PATCH] qtdemux: Use mvhd transform matrix and support for flipping
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+
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+The mvhd matrix is now combined with the tkhd matrix. The combined
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+matrix is then checked if it matches one of the standard values for
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+GST_TAG_IMAGE_ORIENTATION.
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+This check now includes matrices with flipping.
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+
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+Fixes #4064
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+
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+Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/8127>
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+
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+CVE: CVE-2025-47183
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+Upstream-Status: Backport [https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/c4d0f4bbd9a8e97f119a4528b9f4662a6b80922c]
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+Signed-off-by: Hitendra Prajapati <hprajapati@mvista.com>
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+---
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+ gst/isomp4/qtdemux.c | 53 ++++++++++++++++++++++++++++++++++++++++----
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+ 1 file changed, 49 insertions(+), 4 deletions(-)
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+
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+diff --git a/gst/isomp4/qtdemux.c b/gst/isomp4/qtdemux.c
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+index 10b21a6..e708ef4 100644
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+--- a/gst/isomp4/qtdemux.c
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++++ b/gst/isomp4/qtdemux.c
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+@@ -10861,6 +10861,23 @@ qtdemux_parse_transformation_matrix (GstQTDemux * qtdemux,
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+ return TRUE;
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+ }
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+
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++static void
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++qtdemux_mul_transformation_matrix (GstQTDemux * qtdemux,
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++ guint32 * a, guint32 * b, guint32 * c)
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++{
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++#define QTMUL_MATRIX(_a,_b) (((_a) == 0 || (_b) == 0) ? 0 : \
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++ ((_a) == (_b) ? 1 : -1))
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++#define QTADD_MATRIX(_a,_b) ((_a) + (_b) > 0 ? (1U << 16) : \
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++ ((_a) + (_b) < 0) ? (G_MAXUINT16 << 16) : 0u)
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++
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++ c[2] = c[5] = c[6] = c[7] = 0;
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++ c[0] = QTADD_MATRIX (QTMUL_MATRIX (a[0], b[0]), QTMUL_MATRIX (a[1], b[3]));
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++ c[1] = QTADD_MATRIX (QTMUL_MATRIX (a[0], b[1]), QTMUL_MATRIX (a[1], b[4]));
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++ c[3] = QTADD_MATRIX (QTMUL_MATRIX (a[3], b[0]), QTMUL_MATRIX (a[4], b[3]));
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++ c[4] = QTADD_MATRIX (QTMUL_MATRIX (a[3], b[1]), QTMUL_MATRIX (a[4], b[4]));
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++ c[8] = a[8];
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++}
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++
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+ static void
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+ qtdemux_inspect_transformation_matrix (GstQTDemux * qtdemux,
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+ QtDemuxStream * stream, guint32 * matrix, GstTagList ** taglist)
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+@@ -10889,6 +10906,14 @@ qtdemux_inspect_transformation_matrix (GstQTDemux * qtdemux,
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+ rotation_tag = "rotate-180";
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+ } else if (QTCHECK_MATRIX (matrix, 0, G_MAXUINT16, 1, 0)) {
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+ rotation_tag = "rotate-270";
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++ } else if (QTCHECK_MATRIX (matrix, G_MAXUINT16, 0, 0, 1)) {
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++ rotation_tag = "flip-rotate-0";
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++ } else if (QTCHECK_MATRIX (matrix, 0, G_MAXUINT16, 1, 0)) {
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++ rotation_tag = "flip-rotate-90";
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++ } else if (QTCHECK_MATRIX (matrix, 1, 0, 0, G_MAXUINT16)) {
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++ rotation_tag = "flip-rotate-180";
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++ } else if (QTCHECK_MATRIX (matrix, 0, 1, 1, 0)) {
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++ rotation_tag = "flip-rotate-270";
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+ } else {
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+ GST_FIXME_OBJECT (qtdemux, "Unhandled transformation matrix values");
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+ }
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+@@ -11175,7 +11200,7 @@ qtdemux_parse_stereo_svmi_atom (GstQTDemux * qtdemux, QtDemuxStream * stream,
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+ * traks that do not decode to something (like strm traks) will not have a pad.
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+ */
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+ static gboolean
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+-qtdemux_parse_trak (GstQTDemux * qtdemux, GNode * trak)
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++qtdemux_parse_trak (GstQTDemux * qtdemux, GNode * trak, guint32 * mvhd_matrix)
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+ {
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+ GstByteReader tkhd;
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+ int offset;
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+@@ -11347,15 +11372,21 @@ qtdemux_parse_trak (GstQTDemux * qtdemux, GNode * trak)
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+
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+ /* parse rest of tkhd */
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+ if (stream->subtype == FOURCC_vide) {
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++ guint32 tkhd_matrix[9];
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+ guint32 matrix[9];
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+
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+ /* version 1 uses some 64-bit ints */
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+ if (!gst_byte_reader_skip (&tkhd, 20 + value_size))
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+ goto corrupt_file;
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+
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+- if (!qtdemux_parse_transformation_matrix (qtdemux, &tkhd, matrix, "tkhd"))
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++ if (!qtdemux_parse_transformation_matrix (qtdemux, &tkhd, tkhd_matrix,
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++ "tkhd"))
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+ goto corrupt_file;
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+
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++ /* calculate the final matrix from the mvhd_matrix and the tkhd matrix */
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++ qtdemux_mul_transformation_matrix (qtdemux, mvhd_matrix, tkhd_matrix,
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++ matrix);
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++
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+ if (!gst_byte_reader_get_uint32_be (&tkhd, &w)
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+ || !gst_byte_reader_get_uint32_be (&tkhd, &h))
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+ goto corrupt_file;
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+@@ -14198,11 +14229,14 @@ qtdemux_parse_tree (GstQTDemux * qtdemux)
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+ guint64 creation_time;
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+ GstDateTime *datetime = NULL;
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+ gint version;
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++ GstByteReader mvhd_reader;
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++ guint32 matrix[9];
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+
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+ /* make sure we have a usable taglist */
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+ qtdemux->tag_list = gst_tag_list_make_writable (qtdemux->tag_list);
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+
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+- mvhd = qtdemux_tree_get_child_by_type (qtdemux->moov_node, FOURCC_mvhd);
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++ mvhd = qtdemux_tree_get_child_by_type_full (qtdemux->moov_node,
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++ FOURCC_mvhd, &mvhd_reader);
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+ if (mvhd == NULL) {
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+ GST_LOG_OBJECT (qtdemux, "No mvhd node found, looking for redirects.");
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+ return qtdemux_parse_redirects (qtdemux);
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+@@ -14213,15 +14247,26 @@ qtdemux_parse_tree (GstQTDemux * qtdemux)
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+ creation_time = QT_UINT64 ((guint8 *) mvhd->data + 12);
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+ qtdemux->timescale = QT_UINT32 ((guint8 *) mvhd->data + 28);
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+ qtdemux->duration = QT_UINT64 ((guint8 *) mvhd->data + 32);
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++ if (!gst_byte_reader_skip (&mvhd_reader, 4 + 8 + 8 + 4 + 8))
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++ return FALSE;
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+ } else if (version == 0) {
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+ creation_time = QT_UINT32 ((guint8 *) mvhd->data + 12);
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+ qtdemux->timescale = QT_UINT32 ((guint8 *) mvhd->data + 20);
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+ qtdemux->duration = QT_UINT32 ((guint8 *) mvhd->data + 24);
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++ if (!gst_byte_reader_skip (&mvhd_reader, 4 + 4 + 4 + 4 + 4))
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++ return FALSE;
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+ } else {
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+ GST_WARNING_OBJECT (qtdemux, "Unhandled mvhd version %d", version);
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+ return FALSE;
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+ }
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+
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++ if (!gst_byte_reader_skip (&mvhd_reader, 4 + 2 + 2 + 2 * 4))
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++ return FALSE;
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++
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++ if (!qtdemux_parse_transformation_matrix (qtdemux, &mvhd_reader, matrix,
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++ "mvhd"))
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++ return FALSE;
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++
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+ /* Moving qt creation time (secs since 1904) to unix time */
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+ if (creation_time != 0) {
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+ /* Try to use epoch first as it should be faster and more commonly found */
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+@@ -14290,7 +14335,7 @@ qtdemux_parse_tree (GstQTDemux * qtdemux)
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+ /* parse all traks */
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+ trak = qtdemux_tree_get_child_by_type (qtdemux->moov_node, FOURCC_trak);
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+ while (trak) {
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+- qtdemux_parse_trak (qtdemux, trak);
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++ qtdemux_parse_trak (qtdemux, trak, matrix);
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+ /* iterate all siblings */
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+ trak = qtdemux_tree_get_sibling_by_type (trak, FOURCC_trak);
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+ }
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+--
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+2.50.1
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+
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