avutil/frame: move side data helpers to a new file

Should reduce clutter in frame.c, plus allow us to make opaque changes to
side data handling.

Signed-off-by: James Almer <jamrial@gmail.com>

1 files changed, 313 insertions, 0 deletions

diff --git a/libavutil/side_data.c b/libavutil/side_data.c
new file mode 100644
index 0000000000..17965f2d3c
--- /dev/null
+++ b/libavutil/side_data.c
@@ -0,0 +1,313 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "avassert.h"
+#include "buffer.h"
+#include "common.h"
+#include "dict.h"
+#include "frame.h"
+#include "mem.h"
+#include "side_data.h"
+
+static const AVSideDataDescriptor sd_props[] = {
+    [AV_FRAME_DATA_PANSCAN]                     = { "AVPanScan",                                    AV_SIDE_DATA_PROP_SIZE_DEPENDENT },
+    [AV_FRAME_DATA_A53_CC]                      = { "ATSC A53 Part 4 Closed Captions" },
+    [AV_FRAME_DATA_MATRIXENCODING]              = { "AVMatrixEncoding",                             AV_SIDE_DATA_PROP_CHANNEL_DEPENDENT },
+    [AV_FRAME_DATA_DOWNMIX_INFO]                = { "Metadata relevant to a downmix procedure",     AV_SIDE_DATA_PROP_CHANNEL_DEPENDENT },
+    [AV_FRAME_DATA_AFD]                         = { "Active format description" },
+    [AV_FRAME_DATA_MOTION_VECTORS]              = { "Motion vectors",                               AV_SIDE_DATA_PROP_SIZE_DEPENDENT },
+    [AV_FRAME_DATA_SKIP_SAMPLES]                = { "Skip samples" },
+    [AV_FRAME_DATA_GOP_TIMECODE]                = { "GOP timecode" },
+    [AV_FRAME_DATA_S12M_TIMECODE]               = { "SMPTE 12-1 timecode" },
+    [AV_FRAME_DATA_DYNAMIC_HDR_PLUS]            = { "HDR Dynamic Metadata SMPTE2094-40 (HDR10+)",   AV_SIDE_DATA_PROP_COLOR_DEPENDENT },
+    [AV_FRAME_DATA_DYNAMIC_HDR_VIVID]           = { "HDR Dynamic Metadata CUVA 005.1 2021 (Vivid)", AV_SIDE_DATA_PROP_COLOR_DEPENDENT },
+    [AV_FRAME_DATA_REGIONS_OF_INTEREST]         = { "Regions Of Interest",                          AV_SIDE_DATA_PROP_SIZE_DEPENDENT },
+    [AV_FRAME_DATA_VIDEO_ENC_PARAMS]            = { "Video encoding parameters" },
+    [AV_FRAME_DATA_FILM_GRAIN_PARAMS]           = { "Film grain parameters" },
+    [AV_FRAME_DATA_DETECTION_BBOXES]            = { "Bounding boxes for object detection and classification", AV_SIDE_DATA_PROP_SIZE_DEPENDENT },
+    [AV_FRAME_DATA_DOVI_RPU_BUFFER]             = { "Dolby Vision RPU Data",                        AV_SIDE_DATA_PROP_COLOR_DEPENDENT },
+    [AV_FRAME_DATA_DOVI_METADATA]               = { "Dolby Vision Metadata",                        AV_SIDE_DATA_PROP_COLOR_DEPENDENT },
+    [AV_FRAME_DATA_LCEVC]                       = { "LCEVC NAL data",                               AV_SIDE_DATA_PROP_SIZE_DEPENDENT },
+    [AV_FRAME_DATA_VIEW_ID]                     = { "View ID" },
+    [AV_FRAME_DATA_STEREO3D]                    = { "Stereo 3D",                                    AV_SIDE_DATA_PROP_GLOBAL },
+    [AV_FRAME_DATA_REPLAYGAIN]                  = { "AVReplayGain",                                 AV_SIDE_DATA_PROP_GLOBAL },
+    [AV_FRAME_DATA_DISPLAYMATRIX]               = { "3x3 displaymatrix",                            AV_SIDE_DATA_PROP_GLOBAL },
+    [AV_FRAME_DATA_AUDIO_SERVICE_TYPE]          = { "Audio service type",                           AV_SIDE_DATA_PROP_GLOBAL },
+    [AV_FRAME_DATA_MASTERING_DISPLAY_METADATA]  = { "Mastering display metadata",                   AV_SIDE_DATA_PROP_GLOBAL | AV_SIDE_DATA_PROP_COLOR_DEPENDENT },
+    [AV_FRAME_DATA_CONTENT_LIGHT_LEVEL]         = { "Content light level metadata",                 AV_SIDE_DATA_PROP_GLOBAL | AV_SIDE_DATA_PROP_COLOR_DEPENDENT },
+    [AV_FRAME_DATA_AMBIENT_VIEWING_ENVIRONMENT] = { "Ambient viewing environment",                  AV_SIDE_DATA_PROP_GLOBAL },
+    [AV_FRAME_DATA_SPHERICAL]                   = { "Spherical Mapping",                            AV_SIDE_DATA_PROP_GLOBAL | AV_SIDE_DATA_PROP_SIZE_DEPENDENT },
+    [AV_FRAME_DATA_ICC_PROFILE]                 = { "ICC profile",                                  AV_SIDE_DATA_PROP_GLOBAL | AV_SIDE_DATA_PROP_COLOR_DEPENDENT },
+    [AV_FRAME_DATA_SEI_UNREGISTERED]            = { "H.26[45] User Data Unregistered SEI message",  AV_SIDE_DATA_PROP_MULTI },
+    [AV_FRAME_DATA_VIDEO_HINT]                  = { "Encoding video hint",                          AV_SIDE_DATA_PROP_SIZE_DEPENDENT },
+};
+
+const AVSideDataDescriptor *av_frame_side_data_desc(enum AVFrameSideDataType type)
+{
+    unsigned t = type;
+    if (t < FF_ARRAY_ELEMS(sd_props) && sd_props[t].name)
+        return &sd_props[t];
+    return NULL;
+}
+
+const char *av_frame_side_data_name(enum AVFrameSideDataType type)
+{
+    const AVSideDataDescriptor *desc = av_frame_side_data_desc(type);
+    return desc ? desc->name : NULL;
+}
+
+static void free_side_data_entry(AVFrameSideData **ptr_sd)
+{
+    AVFrameSideData *sd = *ptr_sd;
+
+    av_buffer_unref(&sd->buf);
+    av_dict_free(&sd->metadata);
+    av_freep(ptr_sd);
+}
+
+static void remove_side_data_by_entry(AVFrameSideData ***sd, int *nb_sd,
+                                      const AVFrameSideData *target)
+{
+    for (int i = *nb_sd - 1; i >= 0; i--) {
+        AVFrameSideData *entry = ((*sd)[i]);
+        if (entry != target)
+            continue;
+
+        free_side_data_entry(&entry);
+
+        ((*sd)[i]) = ((*sd)[*nb_sd - 1]);
+        (*nb_sd)--;
+
+        return;
+    }
+}
+
+void av_frame_side_data_remove(AVFrameSideData ***sd, int *nb_sd,
+                               enum AVFrameSideDataType type)
+{
+    for (int i = *nb_sd - 1; i >= 0; i--) {
+        AVFrameSideData *entry = ((*sd)[i]);
+        if (entry->type != type)
+            continue;
+
+        free_side_data_entry(&entry);
+
+        ((*sd)[i]) = ((*sd)[*nb_sd - 1]);
+        (*nb_sd)--;
+    }
+}
+
+void av_frame_side_data_remove_by_props(AVFrameSideData ***sd, int *nb_sd,
+                                        int props)
+{
+    for (int i = *nb_sd - 1; i >= 0; i--) {
+        AVFrameSideData *entry = ((*sd)[i]);
+        const AVSideDataDescriptor *desc = av_frame_side_data_desc(entry->type);
+        if (!desc || !(desc->props & props))
+            continue;
+
+        free_side_data_entry(&entry);
+
+        ((*sd)[i]) = ((*sd)[*nb_sd - 1]);
+        (*nb_sd)--;
+    }
+}
+
+void av_frame_side_data_free(AVFrameSideData ***sd, int *nb_sd)
+{
+    for (int i = 0; i < *nb_sd; i++)
+        free_side_data_entry(&((*sd)[i]));
+    *nb_sd = 0;
+
+    av_freep(sd);
+}
+
+static AVFrameSideData *add_side_data_from_buf_ext(AVFrameSideData ***sd,
+                                                   int *nb_sd,
+                                                   enum AVFrameSideDataType type,
+                                                   AVBufferRef *buf, uint8_t *data,
+                                                   size_t size)
+{
+    AVFrameSideData *ret, **tmp;
+
+    // *nb_sd + 1 needs to fit into an int and a size_t.
+    if ((unsigned)*nb_sd >= FFMIN(INT_MAX, SIZE_MAX))
+        return NULL;
+
+    tmp = av_realloc_array(*sd, sizeof(**sd), *nb_sd + 1);
+    if (!tmp)
+        return NULL;
+    *sd = tmp;
+
+    ret = av_mallocz(sizeof(*ret));
+    if (!ret)
+        return NULL;
+
+    ret->buf = buf;
+    ret->data = data;
+    ret->size = size;
+    ret->type = type;
+
+    (*sd)[(*nb_sd)++] = ret;
+
+    return ret;
+}
+
+AVFrameSideData *ff_frame_side_data_add_from_buf(AVFrameSideData ***sd,
+                                                 int *nb_sd,
+                                                 enum AVFrameSideDataType type,
+                                                 AVBufferRef *buf)
+{
+    if (!buf)
+        return NULL;
+
+    return add_side_data_from_buf_ext(sd, nb_sd, type, buf, buf->data, buf->size);
+}
+
+static AVFrameSideData *replace_side_data_from_buf(AVFrameSideData *dst,
+                                                   AVBufferRef *buf, int flags)
+{
+    if (!(flags & AV_FRAME_SIDE_DATA_FLAG_REPLACE))
+        return NULL;
+
+    av_dict_free(&dst->metadata);
+    av_buffer_unref(&dst->buf);
+    dst->buf  = buf;
+    dst->data = buf->data;
+    dst->size = buf->size;
+    return dst;
+}
+
+AVFrameSideData *av_frame_side_data_new(AVFrameSideData ***sd, int *nb_sd,
+                                        enum AVFrameSideDataType type,
+                                        size_t size, unsigned int flags)
+{
+    const AVSideDataDescriptor *desc = av_frame_side_data_desc(type);
+    AVBufferRef     *buf = av_buffer_alloc(size);
+    AVFrameSideData *ret = NULL;
+
+    if (flags & AV_FRAME_SIDE_DATA_FLAG_UNIQUE)
+        av_frame_side_data_remove(sd, nb_sd, type);
+    if ((!desc || !(desc->props & AV_SIDE_DATA_PROP_MULTI)) &&
+        (ret = (AVFrameSideData *)av_frame_side_data_get(*sd, *nb_sd, type))) {
+        ret = replace_side_data_from_buf(ret, buf, flags);
+        if (!ret)
+            av_buffer_unref(&buf);
+        return ret;
+    }
+
+    ret = ff_frame_side_data_add_from_buf(sd, nb_sd, type, buf);
+    if (!ret)
+        av_buffer_unref(&buf);
+
+    return ret;
+}
+
+AVFrameSideData *av_frame_side_data_add(AVFrameSideData ***sd, int *nb_sd,
+                                        enum AVFrameSideDataType type,
+                                        AVBufferRef **pbuf, unsigned int flags)
+{
+    const AVSideDataDescriptor *desc = av_frame_side_data_desc(type);
+    AVFrameSideData *sd_dst  = NULL;
+    AVBufferRef *buf = *pbuf;
+
+    if ((flags & AV_FRAME_SIDE_DATA_FLAG_NEW_REF) && !(buf = av_buffer_ref(*pbuf)))
+        return NULL;
+    if (flags & AV_FRAME_SIDE_DATA_FLAG_UNIQUE)
+        av_frame_side_data_remove(sd, nb_sd, type);
+    if ((!desc || !(desc->props & AV_SIDE_DATA_PROP_MULTI)) &&
+        (sd_dst = (AVFrameSideData *)av_frame_side_data_get(*sd, *nb_sd, type))) {
+        sd_dst = replace_side_data_from_buf(sd_dst, buf, flags);
+    } else
+        sd_dst = ff_frame_side_data_add_from_buf(sd, nb_sd, type, buf);
+
+    if (sd_dst && !(flags & AV_FRAME_SIDE_DATA_FLAG_NEW_REF))
+        *pbuf = NULL;
+    else if (!sd_dst && (flags & AV_FRAME_SIDE_DATA_FLAG_NEW_REF))
+        av_buffer_unref(&buf);
+    return sd_dst;
+}
+
+int av_frame_side_data_clone(AVFrameSideData ***sd, int *nb_sd,
+                             const AVFrameSideData *src, unsigned int flags)
+{
+    const AVSideDataDescriptor *desc;
+    AVBufferRef     *buf    = NULL;
+    AVFrameSideData *sd_dst = NULL;
+    int              ret    = AVERROR_BUG;
+
+    if (!sd || !src || !nb_sd || (*nb_sd && !*sd))
+        return AVERROR(EINVAL);
+
+    desc = av_frame_side_data_desc(src->type);
+    if (flags & AV_FRAME_SIDE_DATA_FLAG_UNIQUE)
+        av_frame_side_data_remove(sd, nb_sd, src->type);
+    if ((!desc || !(desc->props & AV_SIDE_DATA_PROP_MULTI)) &&
+        (sd_dst = (AVFrameSideData *)av_frame_side_data_get(*sd, *nb_sd, src->type))) {
+        AVDictionary *dict = NULL;
+
+        if (!(flags & AV_FRAME_SIDE_DATA_FLAG_REPLACE))
+            return AVERROR(EEXIST);
+
+        ret = av_dict_copy(&dict, src->metadata, 0);
+        if (ret < 0)
+            return ret;
+
+        ret = av_buffer_replace(&sd_dst->buf, src->buf);
+        if (ret < 0) {
+            av_dict_free(&dict);
+            return ret;
+        }
+
+        av_dict_free(&sd_dst->metadata);
+        sd_dst->metadata = dict;
+        sd_dst->data     = src->data;
+        sd_dst->size     = src->size;
+        return 0;
+    }
+
+    buf = av_buffer_ref(src->buf);
+    if (!buf)
+        return AVERROR(ENOMEM);
+
+    sd_dst = add_side_data_from_buf_ext(sd, nb_sd, src->type, buf,
+                                        src->data, src->size);
+    if (!sd_dst) {
+        av_buffer_unref(&buf);
+        return AVERROR(ENOMEM);
+    }
+
+    ret = av_dict_copy(&sd_dst->metadata, src->metadata, 0);
+    if (ret < 0) {
+        remove_side_data_by_entry(sd, nb_sd, sd_dst);
+        return ret;
+    }
+
+    return 0;
+}
+
+const AVFrameSideData *av_frame_side_data_get_c(const AVFrameSideData * const *sd,
+                                                const int nb_sd,
+                                                enum AVFrameSideDataType type)
+{
+    for (int i = 0; i < nb_sd; i++) {
+        if (sd[i]->type == type)
+            return sd[i];
+    }
+    return NULL;
+}