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qtmux: Implement writing of av1C version 1 box

Browse source 
Version 0 is ancient and not specified in any documents. Take it
directly from the `codec_data` if presents or otherwise try to construct
a reasonably looking `av1C` box.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4028>
This commit is contained in:
Sebastian Dröge 2023-02-02 16:48:05 +02:00 committed by GStreamer Marge Bot
parent 9ab884833b
commit 3e596c9038
1 changed files with 79 additions and 16 deletions
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95
subprojects/gst-plugins-good/gst/isomp4/gstqtmux.c
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@ -6525,25 +6525,88 @@ gst_qt_mux_video_sink_set_caps (GstQTMuxPad * qtpad, GstCaps * caps)
entry.fourcc = FOURCC_cfhd;
sync = FALSE;
} else if (strcmp (mimetype, "video/x-av1") == 0) {
gint presentation_delay;
guint8 presentation_delay_byte = 0;
GstBuffer *av1_codec_data;
gint presentation_delay = -1;
GstBuffer *av1_codec_data = NULL;
if (gst_structure_get_int (structure, "presentation-delay",
&presentation_delay)) {
presentation_delay_byte = 1 << 5;
presentation_delay_byte |= MAX (0xF, presentation_delay & 0xF);
if (codec_data) {
av1_codec_data = gst_buffer_ref ((GstBuffer *) codec_data);
} else {
GstMapInfo map;
const gchar *tmp;
guint tmp2;
gst_structure_get_int (structure, "presentation-delay",
&presentation_delay);
av1_codec_data = gst_buffer_new_allocate (NULL, 4, NULL);
gst_buffer_map (av1_codec_data, &map, GST_MAP_WRITE);
/*
* unsigned int (1) marker = 1;
* unsigned int (7) version = 1;
* unsigned int (3) seq_profile;
* unsigned int (5) seq_level_idx_0;
* unsigned int (1) seq_tier_0;
* unsigned int (1) high_bitdepth;
* unsigned int (1) twelve_bit;
* unsigned int (1) monochrome;
* unsigned int (1) chroma_subsampling_x;
* unsigned int (1) chroma_subsampling_y;
* unsigned int (2) chroma_sample_position;
* unsigned int (3) reserved = 0;
*
* unsigned int (1) initial_presentation_delay_present;
* if (initial_presentation_delay_present) {
* unsigned int (4) initial_presentation_delay_minus_one;
* } else {
* unsigned int (4) reserved = 0;
* }
*/
map.data[0] = 0x81;
map.data[1] = 0x00;
if ((tmp = gst_structure_get_string (structure, "profile"))) {
if (strcmp (tmp, "main") == 0)
map.data[1] |= (0 << 5);
if (strcmp (tmp, "high") == 0)
map.data[1] |= (1 << 5);
if (strcmp (tmp, "professional") == 0)
map.data[1] |= (2 << 5);
}
/* FIXME: level set to 1 */
map.data[1] |= 0x01;
/* FIXME: tier set to 0 */
if (gst_structure_get_uint (structure, "bit-depth-luma", &tmp2)) {
if (tmp2 == 10) {
map.data[2] |= 0x40;
} else if (tmp2 == 12) {
map.data[2] |= 0x60;
}
}
/* Assume 4:2:0 if nothing else is given */
map.data[2] |= 0x0C;
if ((tmp = gst_structure_get_string (structure, "chroma-format"))) {
if (strcmp (tmp, "4:0:0") == 0)
map.data[2] |= 0x1C;
if (strcmp (tmp, "4:2:0") == 0)
map.data[2] |= 0x0C;
if (strcmp (tmp, "4:2:2") == 0)
map.data[2] |= 0x08;
if (strcmp (tmp, "4:4:4") == 0)
map.data[2] |= 0x00;
}
/* FIXME: keep chroma-site unknown */
if (presentation_delay != -1) {
map.data[3] = 0x10 | (MAX (0xF, presentation_delay) & 0xF);
}
gst_buffer_unmap (av1_codec_data, &map);
}
av1_codec_data = gst_buffer_new_allocate (NULL, 5, NULL);
/* Fill version and 3 bytes of flags to 0 */
gst_buffer_memset (av1_codec_data, 0, 0, 4);
gst_buffer_fill (av1_codec_data, 4, &presentation_delay_byte, 1);
if (codec_data)
av1_codec_data = gst_buffer_append (av1_codec_data,
gst_buffer_ref ((GstBuffer *) codec_data));
entry.fourcc = FOURCC_av01;
ext_atom = build_btrt_extension (0, qtpad->avg_bitrate, qtpad->max_bitrate);