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Diffstat (limited to '')
| -rw-r--r-- | media/ffvpx/libavcodec/packet.c | 752 |
1 files changed, 752 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/packet.c b/media/ffvpx/libavcodec/packet.c new file mode 100644 index 0000000000..e118bbaad1 --- /dev/null +++ b/media/ffvpx/libavcodec/packet.c @@ -0,0 +1,752 @@ +/* + * 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_AMBIENT_VIEWING_ENVIRONMENT:return "Ambient viewing environment"; + 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; +} |