This patchset adds new boxes and projection values from from
https://developer.apple.com/av-foundation/Stereo-Video-ISOBMFF-Extensions.pdf
Vittorio Giovara (2):
mov: Export frame packing information from pack box
lavu/spherical: Add support for Spherical Immersive type
libavformat/mov.c | 89 +++++++++++++++++++++++++++++++++++++++++++
libavutil/spherical.c | 1 +
libavutil/spherical.h | 6 +++
3 files changed, 96 insertions(+)
From a244d96e045439f9e3a4db99e2f479e8686221da Mon Sep 17 00:00:00 2001
From: Vittorio Giovara <vittorio.giovara@gmail.com>
Date: Wed, 23 Jul 2025 23:42:14 +0200
Subject: [PATCH 2/2] lavu/spherical: Add support for Spherical Immersive type
---
libavformat/mov.c | 3 +++
libavutil/spherical.c | 1 +
libavutil/spherical.h | 6 ++++++
3 files changed, 10 insertions(+)
diff --git a/libavformat/mov.c b/libavformat/mov.c
index 7c91322027..eeb406609c 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -6860,6 +6860,9 @@ static int mov_read_vexu_proj(MOVContext *c, AVIOContext *pb, MOVAtom atom)
case MKTAG('f','i','s','h'):
projection = AV_SPHERICAL_FISHEYE;
break;
+ case MKTAG('p','r','i','m'):
+ projection = AV_SPHERICAL_PARAMETRIC_IMMERSIVE;
+ break;
default:
av_log(c->fc, AV_LOG_ERROR, "Invalid projection type in prji box: 0x%08X\n", tag);
return AVERROR_INVALIDDATA;
diff --git a/libavutil/spherical.c b/libavutil/spherical.c
index 64ade1d0ec..71342faea9 100644
--- a/libavutil/spherical.c
+++ b/libavutil/spherical.c
@@ -62,6 +62,7 @@ static const char *const spherical_projection_names[] = {
[AV_SPHERICAL_HALF_EQUIRECTANGULAR] = "half equirectangular",
[AV_SPHERICAL_RECTILINEAR] = "rectilinear",
[AV_SPHERICAL_FISHEYE] = "fisheye",
+ [AV_SPHERICAL_PARAMETRIC_IMMERSIVE] = "parametric immersive",
};
const char *av_spherical_projection_name(enum AVSphericalProjection projection)
diff --git a/libavutil/spherical.h b/libavutil/spherical.h
index 2e90f7752d..4b78978eb9 100644
--- a/libavutil/spherical.h
+++ b/libavutil/spherical.h
@@ -82,6 +82,12 @@ enum AVSphericalProjection {
* See: https://developer.apple.com/documentation/coremedia/cmprojectiontype/fisheye
*/
AV_SPHERICAL_FISHEYE,
+
+ /**
+ * Parametric Immersive projection (Apple).
+ * See: https://developer.apple.com/documentation/coremedia/cmprojectiontype/parametricimmersive
+ */
+ AV_SPHERICAL_PARAMETRIC_IMMERSIVE,
};
/**
--
2.50.0
From e312beb0c66c96a5cf4ef1c822bd8efbdf5c3b44 Mon Sep 17 00:00:00 2001
From: Vittorio Giovara <vittorio.giovara@gmail.com>
Date: Wed, 23 Jul 2025 23:29:19 +0200
Subject: [PATCH 1/2] mov: Export frame packing information from pack box
---
libavformat/mov.c | 86 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 86 insertions(+)
diff --git a/libavformat/mov.c b/libavformat/mov.c
index ccaa988e4b..7c91322027 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -6596,6 +6596,85 @@ static int mov_read_st3d(MOVContext *c, AVIOContext *pb, MOVAtom atom)
return 0;
}
+static int mov_read_pack(MOVContext *c, AVIOContext *pb, MOVAtom atom)
+{
+ AVStream *st;
+ MOVStreamContext *sc;
+ int size = 0;
+ int64_t remaining;
+ uint32_t tag = 0;
+ enum AVStereo3DType type = AV_STEREO3D_2D;
+
+ if (c->fc->nb_streams < 1)
+ return 0;
+
+ st = c->fc->streams[c->fc->nb_streams - 1];
+ sc = st->priv_data;
+
+ remaining = atom.size;
+ while (remaining > 0) {
+ size = avio_rb32(pb);
+ if (size < 8 || size > remaining ) {
+ av_log(c->fc, AV_LOG_ERROR, "Invalid child size in pack box\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ tag = avio_rl32(pb);
+ switch (tag) {
+ case MKTAG('p','k','i','n'): {
+ if (size != 16) {
+ av_log(c->fc, AV_LOG_ERROR, "Invalid size of pkin box: %d\n", size);
+ return AVERROR_INVALIDDATA;
+ }
+ avio_skip(pb, 1); // version
+ avio_skip(pb, 3); // flags
+
+ tag = avio_rl32(pb);
+ switch (tag) {
+ case MKTAG('s','i','d','e'):
+ type = AV_STEREO3D_SIDEBYSIDE;
+ break;
+ case MKTAG('o','v','e','r'):
+ type = AV_STEREO3D_TOPBOTTOM;
+ break;
+ case 0:
+ // This means value will be set in another layer
+ break;
+ default:
+ av_log(c->fc, AV_LOG_WARNING, "Unknown tag in pkin: 0x%08X\n", tag);
+ avio_skip(pb, size - 8);
+ break;
+ }
+
+ break;
+ }
+ default:
+ av_log(c->fc, AV_LOG_WARNING, "Unknown tag in pack: 0x%08X\n", tag);
+ avio_skip(pb, size - 8);
+ break;
+ }
+ remaining -= size;
+ }
+
+ if (remaining != 0) {
+ av_log(c->fc, AV_LOG_ERROR, "Broken pack box\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ if (type == AV_STEREO3D_2D)
+ return 0;
+
+ if (!sc->stereo3d) {
+ sc->stereo3d = av_stereo3d_alloc_size(&sc->stereo3d_size);
+ if (!sc->stereo3d)
+ return AVERROR(ENOMEM);
+ }
+
+ sc->stereo3d->type = type;
+
+ return 0;
+}
+
static int mov_read_sv3d(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
@@ -7007,6 +7086,13 @@ static int mov_read_vexu(MOVContext *c, AVIOContext *pb, MOVAtom atom)
return ret;
break;
}
+ case MKTAG('p','a','c','k'): {
+ MOVAtom pack = { tag, size - 8 };
+ int ret = mov_read_pack(c, pb, pack);
+ if (ret < 0)
+ return ret;
+ break;
+ }
default:
av_log(c->fc, AV_LOG_WARNING, "Unknown tag in vexu: 0x%08X\n", tag);
avio_skip(pb, size - 8);
--
2.50.0
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