Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 751 insertions, 0 deletions

diff --git a/media/ffvpx/libavcodec/avpacket.c b/media/ffvpx/libavcodec/avpacket.c
new file mode 100644
index 0000000000..0f8c9b77ae
--- /dev/null
+++ b/media/ffvpx/libavcodec/avpacket.c
@@ -0,0 +1,751 @@
+/*
+ * AVPacket functions for libavcodec
+ * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
+ *
+ * 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 <string.h>
+
+#include "libavutil/avassert.h"
+#include "libavutil/avutil.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/mem.h"
+#include "libavutil/rational.h"
+
+#include "defs.h"
+#include "packet.h"
+#include "packet_internal.h"
+
+#if FF_API_INIT_PACKET
+void av_init_packet(AVPacket *pkt)
+{
+    pkt->pts                  = AV_NOPTS_VALUE;
+    pkt->dts                  = AV_NOPTS_VALUE;
+    pkt->pos                  = -1;
+    pkt->duration             = 0;
+    pkt->flags                = 0;
+    pkt->stream_index         = 0;
+    pkt->buf                  = NULL;
+    pkt->side_data            = NULL;
+    pkt->side_data_elems      = 0;
+    pkt->opaque               = NULL;
+    pkt->opaque_ref           = NULL;
+    pkt->time_base            = av_make_q(0, 1);
+}
+#endif
+
+static void get_packet_defaults(AVPacket *pkt)
+{
+    memset(pkt, 0, sizeof(*pkt));
+
+    pkt->pts             = AV_NOPTS_VALUE;
+    pkt->dts             = AV_NOPTS_VALUE;
+    pkt->pos             = -1;
+    pkt->time_base       = av_make_q(0, 1);
+}
+
+AVPacket *av_packet_alloc(void)
+{
+    AVPacket *pkt = av_malloc(sizeof(AVPacket));
+    if (!pkt)
+        return pkt;
+
+    get_packet_defaults(pkt);
+
+    return pkt;
+}
+
+void av_packet_free(AVPacket **pkt)
+{
+    if (!pkt || !*pkt)
+        return;
+
+    av_packet_unref(*pkt);
+    av_freep(pkt);
+}
+
+static int packet_alloc(AVBufferRef **buf, int size)
+{
+    int ret;
+    if (size < 0 || size >= INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
+        return AVERROR(EINVAL);
+
+    ret = av_buffer_realloc(buf, size + AV_INPUT_BUFFER_PADDING_SIZE);
+    if (ret < 0)
+        return ret;
+
+    memset((*buf)->data + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
+
+    return 0;
+}
+
+int av_new_packet(AVPacket *pkt, int size)
+{
+    AVBufferRef *buf = NULL;
+    int ret = packet_alloc(&buf, size);
+    if (ret < 0)
+        return ret;
+
+    get_packet_defaults(pkt);
+    pkt->buf      = buf;
+    pkt->data     = buf->data;
+    pkt->size     = size;
+
+    return 0;
+}
+
+void av_shrink_packet(AVPacket *pkt, int size)
+{
+    if (pkt->size <= size)
+        return;
+    pkt->size = size;
+    memset(pkt->data + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
+}
+
+int av_grow_packet(AVPacket *pkt, int grow_by)
+{
+    int new_size;
+    av_assert0((unsigned)pkt->size <= INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE);
+    if ((unsigned)grow_by >
+        INT_MAX - (pkt->size + AV_INPUT_BUFFER_PADDING_SIZE))
+        return AVERROR(ENOMEM);
+
+    new_size = pkt->size + grow_by + AV_INPUT_BUFFER_PADDING_SIZE;
+    if (pkt->buf) {
+        size_t data_offset;
+        uint8_t *old_data = pkt->data;
+        if (pkt->data == NULL) {
+            data_offset = 0;
+            pkt->data = pkt->buf->data;
+        } else {
+            data_offset = pkt->data - pkt->buf->data;
+            if (data_offset > INT_MAX - new_size)
+                return AVERROR(ENOMEM);
+        }
+
+        if (new_size + data_offset > pkt->buf->size ||
+            !av_buffer_is_writable(pkt->buf)) {
+            int ret;
+
+            // allocate slightly more than requested to avoid excessive
+            // reallocations
+            if (new_size + data_offset < INT_MAX - new_size/16)
+                new_size += new_size/16;
+
+            ret = av_buffer_realloc(&pkt->buf, new_size + data_offset);
+            if (ret < 0) {
+                pkt->data = old_data;
+                return ret;
+            }
+            pkt->data = pkt->buf->data + data_offset;
+        }
+    } else {
+        pkt->buf = av_buffer_alloc(new_size);
+        if (!pkt->buf)
+            return AVERROR(ENOMEM);
+        if (pkt->size > 0)
+            memcpy(pkt->buf->data, pkt->data, pkt->size);
+        pkt->data = pkt->buf->data;
+    }
+    pkt->size += grow_by;
+    memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
+
+    return 0;
+}
+
+int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size)
+{
+    if (size >= INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
+        return AVERROR(EINVAL);
+
+    pkt->buf = av_buffer_create(data, size + AV_INPUT_BUFFER_PADDING_SIZE,
+                                av_buffer_default_free, NULL, 0);
+    if (!pkt->buf)
+        return AVERROR(ENOMEM);
+
+    pkt->data = data;
+    pkt->size = size;
+
+    return 0;
+}
+
+void av_packet_free_side_data(AVPacket *pkt)
+{
+    int i;
+    for (i = 0; i < pkt->side_data_elems; i++)
+        av_freep(&pkt->side_data[i].data);
+    av_freep(&pkt->side_data);
+    pkt->side_data_elems = 0;
+}
+
+int av_packet_add_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
+                            uint8_t *data, size_t size)
+{
+    AVPacketSideData *tmp;
+    int i, elems = pkt->side_data_elems;
+
+    for (i = 0; i < elems; i++) {
+        AVPacketSideData *sd = &pkt->side_data[i];
+
+        if (sd->type == type) {
+            av_free(sd->data);
+            sd->data = data;
+            sd->size = size;
+            return 0;
+        }
+    }
+
+    if ((unsigned)elems + 1 > AV_PKT_DATA_NB)
+        return AVERROR(ERANGE);
+
+    tmp = av_realloc(pkt->side_data, (elems + 1) * sizeof(*tmp));
+    if (!tmp)
+        return AVERROR(ENOMEM);
+
+    pkt->side_data = tmp;
+    pkt->side_data[elems].data = data;
+    pkt->side_data[elems].size = size;
+    pkt->side_data[elems].type = type;
+    pkt->side_data_elems++;
+
+    return 0;
+}
+
+
+uint8_t *av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
+                                 size_t size)
+{
+    int ret;
+    uint8_t *data;
+
+    if (size > SIZE_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
+        return NULL;
+    data = av_mallocz(size + AV_INPUT_BUFFER_PADDING_SIZE);
+    if (!data)
+        return NULL;
+
+    ret = av_packet_add_side_data(pkt, type, data, size);
+    if (ret < 0) {
+        av_freep(&data);
+        return NULL;
+    }
+
+    return data;
+}
+
+uint8_t *av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type,
+                                 size_t *size)
+{
+    int i;
+
+    for (i = 0; i < pkt->side_data_elems; i++) {
+        if (pkt->side_data[i].type == type) {
+            if (size)
+                *size = pkt->side_data[i].size;
+            return pkt->side_data[i].data;
+        }
+    }
+    if (size)
+        *size = 0;
+    return NULL;
+}
+
+const char *av_packet_side_data_name(enum AVPacketSideDataType type)
+{
+    switch(type) {
+    case AV_PKT_DATA_PALETTE:                    return "Palette";
+    case AV_PKT_DATA_NEW_EXTRADATA:              return "New Extradata";
+    case AV_PKT_DATA_PARAM_CHANGE:               return "Param Change";
+    case AV_PKT_DATA_H263_MB_INFO:               return "H263 MB Info";
+    case AV_PKT_DATA_REPLAYGAIN:                 return "Replay Gain";
+    case AV_PKT_DATA_DISPLAYMATRIX:              return "Display Matrix";
+    case AV_PKT_DATA_STEREO3D:                   return "Stereo 3D";
+    case AV_PKT_DATA_AUDIO_SERVICE_TYPE:         return "Audio Service Type";
+    case AV_PKT_DATA_QUALITY_STATS:              return "Quality stats";
+    case AV_PKT_DATA_FALLBACK_TRACK:             return "Fallback track";
+    case AV_PKT_DATA_CPB_PROPERTIES:             return "CPB properties";
+    case AV_PKT_DATA_SKIP_SAMPLES:               return "Skip Samples";
+    case AV_PKT_DATA_JP_DUALMONO:                return "JP Dual Mono";
+    case AV_PKT_DATA_STRINGS_METADATA:           return "Strings Metadata";
+    case AV_PKT_DATA_SUBTITLE_POSITION:          return "Subtitle Position";
+    case AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL:   return "Matroska BlockAdditional";
+    case AV_PKT_DATA_WEBVTT_IDENTIFIER:          return "WebVTT ID";
+    case AV_PKT_DATA_WEBVTT_SETTINGS:            return "WebVTT Settings";
+    case AV_PKT_DATA_METADATA_UPDATE:            return "Metadata Update";
+    case AV_PKT_DATA_MPEGTS_STREAM_ID:           return "MPEGTS Stream ID";
+    case AV_PKT_DATA_MASTERING_DISPLAY_METADATA: return "Mastering display metadata";
+    case AV_PKT_DATA_CONTENT_LIGHT_LEVEL:        return "Content light level metadata";
+    case AV_PKT_DATA_SPHERICAL:                  return "Spherical Mapping";
+    case AV_PKT_DATA_A53_CC:                     return "A53 Closed Captions";
+    case AV_PKT_DATA_ENCRYPTION_INIT_INFO:       return "Encryption initialization data";
+    case AV_PKT_DATA_ENCRYPTION_INFO:            return "Encryption info";
+    case AV_PKT_DATA_AFD:                        return "Active Format Description data";
+    case AV_PKT_DATA_PRFT:                       return "Producer Reference Time";
+    case AV_PKT_DATA_ICC_PROFILE:                return "ICC Profile";
+    case AV_PKT_DATA_DOVI_CONF:                  return "DOVI configuration record";
+    case AV_PKT_DATA_S12M_TIMECODE:              return "SMPTE ST 12-1:2014 timecode";
+    case AV_PKT_DATA_DYNAMIC_HDR10_PLUS:         return "HDR10+ Dynamic Metadata (SMPTE 2094-40)";
+    case AV_PKT_DATA_IAMF_MIX_GAIN_PARAM:        return "IAMF Mix Gain Parameter Data";
+    case AV_PKT_DATA_IAMF_DEMIXING_INFO_PARAM:   return "IAMF Demixing Info Parameter Data";
+    case AV_PKT_DATA_IAMF_RECON_GAIN_INFO_PARAM: return "IAMF Recon Gain Info Parameter Data";
+    }
+    return NULL;
+}
+
+uint8_t *av_packet_pack_dictionary(AVDictionary *dict, size_t *size)
+{
+    uint8_t *data = NULL;
+    *size = 0;
+
+    if (!dict)
+        return NULL;
+
+    for (int pass = 0; pass < 2; pass++) {
+        const AVDictionaryEntry *t = NULL;
+        size_t total_length = 0;
+
+        while ((t = av_dict_iterate(dict, t))) {
+            for (int i = 0; i < 2; i++) {
+                const char  *str = i ? t->value : t->key;
+                const size_t len = strlen(str) + 1;
+
+                if (pass)
+                    memcpy(data + total_length, str, len);
+                else if (len > SIZE_MAX - total_length)
+                    return NULL;
+                total_length += len;
+            }
+        }
+        if (pass)
+            break;
+        data = av_malloc(total_length);
+        if (!data)
+            return NULL;
+        *size = total_length;
+    }
+
+    return data;
+}
+
+int av_packet_unpack_dictionary(const uint8_t *data, size_t size,
+                                AVDictionary **dict)
+{
+    const uint8_t *end;
+    int ret;
+
+    if (!dict || !data || !size)
+        return 0;
+    end = data + size;
+    if (size && end[-1])
+        return AVERROR_INVALIDDATA;
+    while (data < end) {
+        const uint8_t *key = data;
+        const uint8_t *val = data + strlen(key) + 1;
+
+        if (val >= end || !*key)
+            return AVERROR_INVALIDDATA;
+
+        ret = av_dict_set(dict, key, val, 0);
+        if (ret < 0)
+            return ret;
+        data = val + strlen(val) + 1;
+    }
+
+    return 0;
+}
+
+int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
+                               size_t size)
+{
+    int i;
+
+    for (i = 0; i < pkt->side_data_elems; i++) {
+        if (pkt->side_data[i].type == type) {
+            if (size > pkt->side_data[i].size)
+                return AVERROR(ENOMEM);
+            pkt->side_data[i].size = size;
+            return 0;
+        }
+    }
+    return AVERROR(ENOENT);
+}
+
+int av_packet_copy_props(AVPacket *dst, const AVPacket *src)
+{
+    int i, ret;
+
+    dst->pts                  = src->pts;
+    dst->dts                  = src->dts;
+    dst->pos                  = src->pos;
+    dst->duration             = src->duration;
+    dst->flags                = src->flags;
+    dst->stream_index         = src->stream_index;
+    dst->opaque               = src->opaque;
+    dst->time_base            = src->time_base;
+    dst->opaque_ref           = NULL;
+    dst->side_data            = NULL;
+    dst->side_data_elems      = 0;
+
+    ret = av_buffer_replace(&dst->opaque_ref, src->opaque_ref);
+    if (ret < 0)
+        return ret;
+
+    for (i = 0; i < src->side_data_elems; i++) {
+        enum AVPacketSideDataType type = src->side_data[i].type;
+        size_t size = src->side_data[i].size;
+        uint8_t *src_data = src->side_data[i].data;
+        uint8_t *dst_data = av_packet_new_side_data(dst, type, size);
+
+        if (!dst_data) {
+            av_buffer_unref(&dst->opaque_ref);
+            av_packet_free_side_data(dst);
+            return AVERROR(ENOMEM);
+        }
+        memcpy(dst_data, src_data, size);
+    }
+
+    return 0;
+}
+
+void av_packet_unref(AVPacket *pkt)
+{
+    av_packet_free_side_data(pkt);
+    av_buffer_unref(&pkt->opaque_ref);
+    av_buffer_unref(&pkt->buf);
+    get_packet_defaults(pkt);
+}
+
+int av_packet_ref(AVPacket *dst, const AVPacket *src)
+{
+    int ret;
+
+    dst->buf = NULL;
+
+    ret = av_packet_copy_props(dst, src);
+    if (ret < 0)
+        goto fail;
+
+    if (!src->buf) {
+        ret = packet_alloc(&dst->buf, src->size);
+        if (ret < 0)
+            goto fail;
+        av_assert1(!src->size || src->data);
+        if (src->size)
+            memcpy(dst->buf->data, src->data, src->size);
+
+        dst->data = dst->buf->data;
+    } else {
+        dst->buf = av_buffer_ref(src->buf);
+        if (!dst->buf) {
+            ret = AVERROR(ENOMEM);
+            goto fail;
+        }
+        dst->data = src->data;
+    }
+
+    dst->size = src->size;
+
+    return 0;
+fail:
+    av_packet_unref(dst);
+    return ret;
+}
+
+AVPacket *av_packet_clone(const AVPacket *src)
+{
+    AVPacket *ret = av_packet_alloc();
+
+    if (!ret)
+        return ret;
+
+    if (av_packet_ref(ret, src))
+        av_packet_free(&ret);
+
+    return ret;
+}
+
+void av_packet_move_ref(AVPacket *dst, AVPacket *src)
+{
+    *dst = *src;
+    get_packet_defaults(src);
+}
+
+int av_packet_make_refcounted(AVPacket *pkt)
+{
+    int ret;
+
+    if (pkt->buf)
+        return 0;
+
+    ret = packet_alloc(&pkt->buf, pkt->size);
+    if (ret < 0)
+        return ret;
+    av_assert1(!pkt->size || pkt->data);
+    if (pkt->size)
+        memcpy(pkt->buf->data, pkt->data, pkt->size);
+
+    pkt->data = pkt->buf->data;
+
+    return 0;
+}
+
+int av_packet_make_writable(AVPacket *pkt)
+{
+    AVBufferRef *buf = NULL;
+    int ret;
+
+    if (pkt->buf && av_buffer_is_writable(pkt->buf))
+        return 0;
+
+    ret = packet_alloc(&buf, pkt->size);
+    if (ret < 0)
+        return ret;
+    av_assert1(!pkt->size || pkt->data);
+    if (pkt->size)
+        memcpy(buf->data, pkt->data, pkt->size);
+
+    av_buffer_unref(&pkt->buf);
+    pkt->buf  = buf;
+    pkt->data = buf->data;
+
+    return 0;
+}
+
+void av_packet_rescale_ts(AVPacket *pkt, AVRational src_tb, AVRational dst_tb)
+{
+    if (pkt->pts != AV_NOPTS_VALUE)
+        pkt->pts = av_rescale_q(pkt->pts, src_tb, dst_tb);
+    if (pkt->dts != AV_NOPTS_VALUE)
+        pkt->dts = av_rescale_q(pkt->dts, src_tb, dst_tb);
+    if (pkt->duration > 0)
+        pkt->duration = av_rescale_q(pkt->duration, src_tb, dst_tb);
+}
+
+int avpriv_packet_list_put(PacketList *packet_buffer,
+                           AVPacket      *pkt,
+                           int (*copy)(AVPacket *dst, const AVPacket *src),
+                           int flags)
+{
+    PacketListEntry *pktl = av_malloc(sizeof(*pktl));
+    int ret;
+
+    if (!pktl)
+        return AVERROR(ENOMEM);
+
+    if (copy) {
+        get_packet_defaults(&pktl->pkt);
+        ret = copy(&pktl->pkt, pkt);
+        if (ret < 0) {
+            av_free(pktl);
+            return ret;
+        }
+    } else {
+        ret = av_packet_make_refcounted(pkt);
+        if (ret < 0) {
+            av_free(pktl);
+            return ret;
+        }
+        av_packet_move_ref(&pktl->pkt, pkt);
+    }
+
+    pktl->next = NULL;
+
+    if (packet_buffer->head)
+        packet_buffer->tail->next = pktl;
+    else
+        packet_buffer->head = pktl;
+
+    /* Add the packet in the buffered packet list. */
+    packet_buffer->tail = pktl;
+    return 0;
+}
+
+int avpriv_packet_list_get(PacketList *pkt_buffer,
+                           AVPacket      *pkt)
+{
+    PacketListEntry *pktl = pkt_buffer->head;
+    if (!pktl)
+        return AVERROR(EAGAIN);
+    *pkt        = pktl->pkt;
+    pkt_buffer->head = pktl->next;
+    if (!pkt_buffer->head)
+        pkt_buffer->tail = NULL;
+    av_freep(&pktl);
+    return 0;
+}
+
+void avpriv_packet_list_free(PacketList *pkt_buf)
+{
+    PacketListEntry *tmp = pkt_buf->head;
+
+    while (tmp) {
+        PacketListEntry *pktl = tmp;
+        tmp = pktl->next;
+        av_packet_unref(&pktl->pkt);
+        av_freep(&pktl);
+    }
+    pkt_buf->head = pkt_buf->tail = NULL;
+}
+
+int ff_side_data_set_encoder_stats(AVPacket *pkt, int quality, int64_t *error, int error_count, int pict_type)
+{
+    uint8_t *side_data;
+    size_t side_data_size;
+    int i;
+
+    side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_QUALITY_STATS, &side_data_size);
+    if (!side_data) {
+        side_data_size = 4+4+8*error_count;
+        side_data = av_packet_new_side_data(pkt, AV_PKT_DATA_QUALITY_STATS,
+                                            side_data_size);
+    }
+
+    if (!side_data || side_data_size < 4+4+8*error_count)
+        return AVERROR(ENOMEM);
+
+    AV_WL32(side_data   , quality  );
+    side_data[4] = pict_type;
+    side_data[5] = error_count;
+    for (i = 0; i<error_count; i++)
+        AV_WL64(side_data+8 + 8*i , error[i]);
+
+    return 0;
+}
+
+int ff_side_data_set_prft(AVPacket *pkt, int64_t timestamp)
+{
+    AVProducerReferenceTime *prft;
+    uint8_t *side_data;
+    size_t side_data_size;
+
+    side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_PRFT, &side_data_size);
+    if (!side_data) {
+        side_data_size = sizeof(AVProducerReferenceTime);
+        side_data = av_packet_new_side_data(pkt, AV_PKT_DATA_PRFT, side_data_size);
+    }
+
+    if (!side_data || side_data_size < sizeof(AVProducerReferenceTime))
+        return AVERROR(ENOMEM);
+
+    prft = (AVProducerReferenceTime *)side_data;
+    prft->wallclock = timestamp;
+    prft->flags = 0;
+
+    return 0;
+}
+
+const AVPacketSideData *av_packet_side_data_get(const AVPacketSideData *sd, int nb_sd,
+                                                enum AVPacketSideDataType type)
+{
+    for (int i = 0; i < nb_sd; i++)
+        if (sd[i].type == type)
+            return &sd[i];
+
+    return NULL;
+}
+
+static AVPacketSideData *packet_side_data_add(AVPacketSideData **psd, int *pnb_sd,
+                                              enum AVPacketSideDataType type,
+                                              void *data, size_t size)
+{
+    AVPacketSideData *sd = *psd, *tmp;
+    int nb_sd = *pnb_sd;
+
+    for (int i = 0; i < nb_sd; i++) {
+        if (sd[i].type != type)
+            continue;
+
+        av_free(sd[i].data);
+        sd[i].data = data;
+        sd[i].size = size;
+        return &sd[i];
+    }
+
+    if (nb_sd == INT_MAX)
+        return NULL;
+
+    tmp = av_realloc_array(sd, nb_sd + 1, sizeof(*tmp));
+    if (!tmp)
+        return NULL;
+
+    *psd = sd = tmp;
+    sd[nb_sd].type = type;
+    sd[nb_sd].data = data;
+    sd[nb_sd].size = size;
+    *pnb_sd = nb_sd + 1;
+
+    return &sd[nb_sd];
+}
+
+AVPacketSideData *av_packet_side_data_add(AVPacketSideData **psd, int *pnb_sd,
+                                          enum AVPacketSideDataType type,
+                                          void *data, size_t size, int flags)
+{
+    return packet_side_data_add(psd, pnb_sd, type, data, size);
+}
+
+AVPacketSideData *av_packet_side_data_new(AVPacketSideData **psd, int *pnb_sd,
+                                          enum AVPacketSideDataType type,
+                                          size_t size, int flags)
+{
+    AVPacketSideData *sd = NULL;
+    uint8_t *data;
+
+    if (size > SIZE_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
+        return NULL;
+
+    data = av_malloc(size + AV_INPUT_BUFFER_PADDING_SIZE);
+    if (!data)
+        return NULL;
+    memset(data + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
+
+    sd = packet_side_data_add(psd, pnb_sd, type, data, size);
+    if (!sd)
+        av_freep(&data);
+
+    return sd;
+}
+
+void av_packet_side_data_remove(AVPacketSideData *sd, int *pnb_sd,
+                                enum AVPacketSideDataType type)
+{
+    int nb_sd = *pnb_sd;
+
+    for (int i = nb_sd - 1; i >= 0; i--) {
+        if (sd[i].type != type)
+            continue;
+        av_free(sd[i].data);
+        sd[i] = sd[--nb_sd];
+        break;
+    }
+
+    *pnb_sd = nb_sd;
+}
+
+void av_packet_side_data_free(AVPacketSideData **psd, int *pnb_sd)
+{
+    AVPacketSideData *sd = *psd;
+    int nb_sd = *pnb_sd;
+
+    for (int i = 0; i < nb_sd; i++)
+        av_free(sd[i].data);
+
+    av_freep(psd);
+    *pnb_sd = 0;
+}