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h264parse: Fix AU collection

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If remaining NALUs are expected to be drained in the current
process_frame() loop, do not adjust offsets. Otherwise NALU data
will point to random byte position and it would be broken data.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5911>
This commit is contained in:
Seungha Yang 2024-01-11 22:20:28 +09:00 committed by GStreamer Marge Bot
parent 100497df20
commit 495390f63a
1 changed files with 23 additions and 13 deletions
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36
subprojects/gst-plugins-bad/gst/videoparsers/gsth264parse.c
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@ -1671,8 +1671,8 @@ gst_h264_parse_clear_backlog (GstH264Parse * h264parse)
static gboolean
gst_h264_parse_process_backlog_loop (GstH264Parse * h264parse,
gint curr_next_thresh, gboolean * aud_insert, guint8 * data,
gint * framesize)
gint curr_next_thresh, gboolean adjust_offset_for_next,
gboolean * aud_insert, guint8 * data, gint * framesize)
{
GstH264NalUnit *bnalu;
gint i, size = 0;
@ -1690,7 +1690,7 @@ gst_h264_parse_process_backlog_loop (GstH264Parse * h264parse,
size = bnalu->offset + bnalu->size;
h264parse->bl_next_nal = i + 1;
} else {
} else if (adjust_offset_for_next) {
/* section of backlog that belong to next AU */
bnalu->offset -= size;
bnalu->sc_offset -= size;
@ -1726,10 +1726,11 @@ gst_h264_parse_process_backlog_nal (GstH264Parse * h264parse, gint * proc_size,
* insert a AUD. If the first nal from next AU is a AUD we don't need to wait
* the completion the first vcl from next AU, AUD is the start of next AU.
*/
if (gst_h264_parse_process_backlog_loop (h264parse,
h264parse->bl_next_au_first_nal, aud_insert, data,
&framesize) == FALSE)
if (!gst_h264_parse_process_backlog_loop (h264parse,
h264parse->bl_next_au_first_nal, FALSE, aud_insert, data,
&framesize)) {
goto fail;
}
/* We've processed a complete AU */
if (au_completed) {
@ -1737,9 +1738,10 @@ gst_h264_parse_process_backlog_nal (GstH264Parse * h264parse, gint * proc_size,
}
/* Process all backlog. Used when draining or output in NAL mode. */
if (gst_h264_parse_process_backlog_loop (h264parse,
h264parse->nal_backlog->len, aud_insert, data, &framesize) == FALSE)
if (!gst_h264_parse_process_backlog_loop (h264parse,
h264parse->nal_backlog->len, TRUE, aud_insert, data, &framesize)) {
goto fail;
}
if (clear_bl) {
gst_h264_parse_clear_backlog (h264parse);
@ -1772,10 +1774,11 @@ gst_h264_parse_process_backlog (GstH264Parse * h264parse, gint * proc_size,
h264parse->nal_backlog->len - 1);
h264parse->current_off = bnalu->offset + bnalu->size;
if (gst_h264_parse_process_backlog_loop (h264parse,
h264parse->bl_next_au_first_nal, aud_insert, data,
&framesize) == FALSE)
if (!gst_h264_parse_process_backlog_loop (h264parse,
h264parse->bl_next_au_first_nal, !proc_nau, aud_insert, data,
&framesize)) {
goto fail;
}
/* We've processed a complete AU */
if (h264parse->bl_next_au_first_nal < h264parse->nal_backlog->len) {
@ -1784,11 +1787,18 @@ gst_h264_parse_process_backlog (GstH264Parse * h264parse, gint * proc_size,
/* Process all backlog. Used when draining or output in NAL mode. */
if (proc_nau) {
if (gst_h264_parse_process_backlog_loop (h264parse,
h264parse->nal_backlog->len, aud_insert, data, &framesize) == FALSE)
gint drain_size = 0;
if (!gst_h264_parse_process_backlog_loop (h264parse,
h264parse->nal_backlog->len, TRUE, aud_insert, data, &drain_size)) {
goto fail;
}
/* returned size is pointing the byte position of the last nalu end.
* do not accumulate but replace with last nalu position */
if (drain_size > 0)
framesize = drain_size;
}
if (clear_bl) {
gst_h264_parse_clear_backlog (h264parse);
}