This implements Spherical Video V1 and V2, as described in the
spatial-media collection by Google.
Signed-off-by: Vittorio Giovara <vittorio.giov...@gmail.com>
---
Please CC.
Vittorio
libavformat/isom.h | 7 ++
libavformat/mov.c | 281 ++++++++++++++++++++++++++++++++++++++++++++++++++++-
2 files changed, 287 insertions(+), 1 deletion(-)
diff --git a/libavformat/isom.h b/libavformat/isom.h
index 02bfedd..0fd9eb0 100644
--- a/libavformat/isom.h
+++ b/libavformat/isom.h
@@ -24,6 +24,9 @@
#ifndef AVFORMAT_ISOM_H
#define AVFORMAT_ISOM_H
+#include "libavutil/spherical.h"
+#include "libavutil/stereo3d.h"
+
#include "avio.h"
#include "internal.h"
#include "dv.h"
@@ -177,6 +180,10 @@ typedef struct MOVStreamContext {
int stsd_count;
int32_t *display_matrix;
+ AVStereo3D *stereo3d;
+ AVSphericalMapping *spherical;
+ size_t spherical_size;
+
uint32_t format;
int has_sidx; // If there is an sidx entry for this stream.
diff --git a/libavformat/mov.c b/libavformat/mov.c
index cb3c61c..d36c935 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -42,6 +42,8 @@
#include "libavutil/aes.h"
#include "libavutil/aes_ctr.h"
#include "libavutil/sha.h"
+#include "libavutil/spherical.h"
+#include "libavutil/stereo3d.h"
#include "libavutil/timecode.h"
#include "libavcodec/ac3tab.h"
#include "libavcodec/mpegaudiodecheader.h"
@@ -4498,8 +4500,230 @@ static int mov_read_tmcd(MOVContext *c, AVIOContext
*pb, MOVAtom atom)
return 0;
}
+static int mov_read_st3d(MOVContext *c, AVIOContext *pb, MOVAtom atom)
+{
+ AVStream *st;
+ MOVStreamContext *sc;
+ enum AVStereo3DType type;
+ int mode;
+
+ if (c->fc->nb_streams < 1)
+ return 0;
+
+ st = c->fc->streams[c->fc->nb_streams - 1];
+ sc = st->priv_data;
+
+ if (atom.size < 1) {
+ av_log(c->fc, AV_LOG_ERROR, "Empty stereoscopic video box\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ mode = avio_r8(pb);
+ switch (mode) {
+ case 0:
+ type = AV_STEREO3D_2D;
+ break;
+ case 1:
+ type = AV_STEREO3D_TOPBOTTOM;
+ break;
+ case 2:
+ type = AV_STEREO3D_SIDEBYSIDE;
+ break;
+ default:
+ av_log(c->fc, AV_LOG_WARNING, "Unknown st3d mode value %d\n", mode);
+ return 0;
+ }
+
+ sc->stereo3d = av_stereo3d_alloc();
+ 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;
+ MOVStreamContext *sc;
+ int size;
+ int32_t yaw, pitch, roll;
+ uint32_t tag;
+ unsigned l, t, r, b;
+ enum AVSphericalProjection projection;
+
+ if (c->fc->nb_streams < 1)
+ return 0;
+
+ st = c->fc->streams[c->fc->nb_streams - 1];
+ sc = st->priv_data;
+
+ if (atom.size < 4) {
+ av_log(c->fc, AV_LOG_ERROR, "Empty spherical video box\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ size = avio_rb32(pb);
+ if (size > atom.size)
+ return AVERROR_INVALIDDATA;
+
+ tag = avio_rl32(pb);
+ if (tag != MKTAG('s','v','h','d')) {
+ av_log(c->fc, AV_LOG_ERROR, "Missing spherical video header\n");
+ return 0;
+ }
+ avio_skip(pb, size - 8); /* metadata_source */
+
+ size = avio_rb32(pb);
+ if (size > atom.size)
+ return AVERROR_INVALIDDATA;
+
+ tag = avio_rl32(pb);
+ if (tag != MKTAG('p','r','o','j')) {
+ av_log(c->fc, AV_LOG_ERROR, "Missing projection box\n");
+ return 0;
+ }
+
+ size = avio_rb32(pb);
+ if (size > atom.size)
+ return AVERROR_INVALIDDATA;
+
+ tag = avio_rl32(pb);
+ if (tag != MKTAG('p','r','h','d')) {
+ av_log(c->fc, AV_LOG_ERROR, "Missing projection header box\n");
+ return 0;
+ }
+
+ /* 16.16 fixed point */
+ yaw = avio_rb32(pb);
+ pitch = avio_rb32(pb);
+ roll = avio_rb32(pb);
+
+ avio_skip(pb, size - 20);
+
+ size = avio_rb32(pb);
+ if (size > atom.size)
+ return AVERROR_INVALIDDATA;
+
+ tag = avio_rl32(pb);
+ switch (tag) {
+ case MKTAG('c','b','m','p'):
+ projection = AV_SPHERICAL_CUBEMAP;
+ avio_skip(pb, 4); /* layout */
+ l = t = r = b = avio_rb32(pb);
+ break;
+ case MKTAG('e','q','u','i'):
+ projection = AV_SPHERICAL_EQUIRECTANGULAR;
+ t = avio_rb32(pb);
+ b = avio_rb32(pb);
+ l = avio_rb32(pb);
+ r = avio_rb32(pb);
+ break;
+ default:
+ av_log(c->fc, AV_LOG_ERROR, "Unknown projection type\n");
+ return 0;
+ }
+
+ sc->spherical = av_spherical_alloc(&sc->spherical_size);
+ if (!sc->spherical)
+ return AVERROR(ENOMEM);
+
+ sc->spherical->projection = projection;
+
+ sc->spherical->yaw = ((double) yaw) / (1 << 16);
+ sc->spherical->pitch = ((double) pitch) / (1 << 16);
+ sc->spherical->roll = ((double) roll) / (1 << 16);
+
+ sc->spherical->left_offset = l;
+ sc->spherical->top_offset = t;
+ sc->spherical->right_offset = r;
+ sc->spherical->bottom_offset = b;
+
+ return 0;
+}
+
+static int mov_parse_uuid_spherical(MOVStreamContext *sc, AVIOContext *pb,
size_t len)
+{
+ int ret = 0;
+ uint8_t *buffer = av_malloc(len + 1);
+ const char *val;
+
+ if (!buffer)
+ return AVERROR(ENOMEM);
+ buffer[len] = '\0';
+
+ ret = ffio_read_size(pb, buffer, len);
+ if (ret < 0)
+ goto out;
+
+ /* Check for mandatory keys and values, try to support XML as best-effort
*/
+ if (av_stristr(buffer, "<GSpherical:StitchingSoftware>") &&
+ (val = av_stristr(buffer, "<GSpherical:Spherical>")) &&
+ av_stristr(val, "true") &&
+ (val = av_stristr(buffer, "<GSpherical:Stitched>")) &&
+ av_stristr(val, "true") &&
+ (val = av_stristr(buffer, "<GSpherical:ProjectionType>")) &&
+ av_stristr(val, "equirectangular")) {
+ sc->spherical = av_spherical_alloc(&sc->spherical_size);
+ if (!sc->spherical)
+ goto out;
+
+ sc->spherical->projection = AV_SPHERICAL_EQUIRECTANGULAR;
+
+ if (av_stristr(buffer, "<GSpherical:StereoMode>")) {
+ enum AVStereo3DType mode;
+
+ if (av_stristr(buffer, "left-right"))
+ mode = AV_STEREO3D_SIDEBYSIDE;
+ else if (av_stristr(buffer, "top-bottom"))
+ mode = AV_STEREO3D_TOPBOTTOM;
+ else
+ mode = AV_STEREO3D_2D;
+
+ sc->stereo3d = av_stereo3d_alloc();
+ if (!sc->stereo3d)
+ goto out;
+
+ sc->stereo3d->type = mode;
+ }
+
+ /* orientation */
+ val = av_stristr(buffer, "<GSpherical:InitialViewHeadingDegrees>");
+ if (val)
+ sc->spherical->yaw = strtol(val, NULL, 10);
+ val = av_stristr(buffer, "<GSpherical:InitialViewPitchDegrees>");
+ if (val)
+ sc->spherical->pitch = strtol(val, NULL, 10);
+ val = av_stristr(buffer, "<GSpherical:InitialViewRollDegrees>");
+ if (val)
+ sc->spherical->roll = strtol(val, NULL, 10);
+
+ /* cropping */
+ val = av_stristr(buffer, "<GSpherical:CroppedAreaLeftPixels>");
+ if (val)
+ sc->spherical->left_offset = strtol(val, NULL, 10);
+ val = av_stristr(buffer, "<GSpherical:CroppedAreaTopPixels>");
+ if (val)
+ sc->spherical->top_offset = strtol(val, NULL, 10);
+ val = av_stristr(buffer, "<GSpherical:CroppedAreaImageWidthPixels>");
+ if (val)
+ sc->spherical->right_offset =
+ sc->width - sc->spherical->left_offset - strtol(val, NULL, 10);
+ val = av_stristr(buffer, "<GSpherical:CroppedAreaImageHeightPixels>");
+ if (val)
+ sc->spherical->bottom_offset =
+ sc->height - sc->spherical->top_offset - strtol(val, NULL, 10);
+ }
+
+out:
+ av_free(buffer);
+ return ret;
+}
+
static int mov_read_uuid(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
+ AVStream *st;
+ MOVStreamContext *sc;
int ret;
uint8_t uuid[16];
static const uint8_t uuid_isml_manifest[] = {
@@ -4510,10 +4734,19 @@ static int mov_read_uuid(MOVContext *c, AVIOContext
*pb, MOVAtom atom)
0xbe, 0x7a, 0xcf, 0xcb, 0x97, 0xa9, 0x42, 0xe8,
0x9c, 0x71, 0x99, 0x94, 0x91, 0xe3, 0xaf, 0xac
};
+ static const uint8_t uuid_spherical[] = {
+ 0xff, 0xcc, 0x82, 0x63, 0xf8, 0x55, 0x4a, 0x93,
+ 0x88, 0x14, 0x58, 0x7a, 0x02, 0x52, 0x1f, 0xdd,
+ };
if (atom.size < sizeof(uuid) || atom.size == INT64_MAX)
return AVERROR_INVALIDDATA;
+ if (c->fc->nb_streams < 1)
+ return 0;
+ st = c->fc->streams[c->fc->nb_streams - 1];
+ sc = st->priv_data;
+
ret = avio_read(pb, uuid, sizeof(uuid));
if (ret < 0) {
return ret;
@@ -4585,7 +4818,14 @@ static int mov_read_uuid(MOVContext *c, AVIOContext *pb,
MOVAtom atom)
av_dict_set(&c->fc->metadata, "xmp", buffer, 0);
}
av_free(buffer);
- }
+ } else if (!memcmp(uuid, uuid_spherical, sizeof(uuid))) {
+ size_t len = atom.size - sizeof(uuid);
+ ret = mov_parse_uuid_spherical(sc, pb, len);
+ if (ret < 0)
+ return ret;
+ if (!sc->spherical)
+ av_log(c->fc, AV_LOG_WARNING, "Invalid spherical metadata
found\n"); }
+
return 0;
}
@@ -4935,6 +5175,8 @@ static const MOVParseTableEntry mov_default_parse_table[]
= {
{ MKTAG('f','r','m','a'), mov_read_frma },
{ MKTAG('s','e','n','c'), mov_read_senc },
{ MKTAG('s','a','i','z'), mov_read_saiz },
+{ MKTAG('s','t','3','d'), mov_read_st3d }, /* stereoscopic 3D video box */
+{ MKTAG('s','v','3','d'), mov_read_sv3d }, /* spherical video box */
{ 0, NULL }
};
@@ -5355,6 +5597,9 @@ static int mov_read_close(AVFormatContext *s)
av_freep(&sc->cenc.auxiliary_info);
av_freep(&sc->cenc.auxiliary_info_sizes);
av_aes_ctr_free(sc->cenc.aes_ctr);
+
+ av_freep(&sc->stereo3d);
+ av_freep(&sc->spherical);
}
if (mov->dv_demux) {
@@ -5682,6 +5927,40 @@ static int mov_read_header(AVFormatContext *s)
sd->data = (uint8_t*)sc->display_matrix;
sc->display_matrix = NULL;
}
+ if (sc->stereo3d) {
+ AVPacketSideData *sd, *tmp;
+
+ tmp = av_realloc_array(st->side_data,
+ st->nb_side_data + 1, sizeof(*tmp));
+ if (!tmp)
+ return AVERROR(ENOMEM);
+
+ st->side_data = tmp;
+ st->nb_side_data++;
+
+ sd = &st->side_data[st->nb_side_data - 1];
+ sd->type = AV_PKT_DATA_STEREO3D;
+ sd->size = sizeof(*sc->stereo3d);
+ sd->data = (uint8_t *)sc->stereo3d;
+ sc->stereo3d = NULL;
+ }
+ if (sc->spherical) {
+ AVPacketSideData *sd, *tmp;
+
+ tmp = av_realloc_array(st->side_data,
+ st->nb_side_data + 1, sizeof(*tmp));
+ if (!tmp)
+ return AVERROR(ENOMEM);
+
+ st->side_data = tmp;
+ st->nb_side_data++;
+
+ sd = &st->side_data[st->nb_side_data - 1];
+ sd->type = AV_PKT_DATA_SPHERICAL;
+ sd->size = sc->spherical_size;
+ sd->data = (uint8_t *)sc->spherical;
+ sc->spherical = NULL;
+ }
break;
}
}
--
2.10.0
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