815 lines
22 KiB
C
815 lines
22 KiB
C
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/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <string.h>
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#include "config.h"
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#include "libavutil/avassert.h"
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#include "libavutil/buffer.h"
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#include "libavutil/common.h"
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#include "cbs.h"
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#include "cbs_internal.h"
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static const CodedBitstreamType *cbs_type_table[] = {
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#if CONFIG_CBS_AV1
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&ff_cbs_type_av1,
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#endif
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#if CONFIG_CBS_H264
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&ff_cbs_type_h264,
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#endif
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#if CONFIG_CBS_H265
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&ff_cbs_type_h265,
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#endif
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#if CONFIG_CBS_JPEG
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&ff_cbs_type_jpeg,
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#endif
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#if CONFIG_CBS_MPEG2
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&ff_cbs_type_mpeg2,
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#endif
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#if CONFIG_CBS_VP9
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&ff_cbs_type_vp9,
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#endif
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};
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const enum AVCodecID ff_cbs_all_codec_ids[] = {
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#if CONFIG_CBS_AV1
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AV_CODEC_ID_AV1,
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#endif
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#if CONFIG_CBS_H264
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AV_CODEC_ID_H264,
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#endif
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#if CONFIG_CBS_H265
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AV_CODEC_ID_H265,
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#endif
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#if CONFIG_CBS_JPEG
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AV_CODEC_ID_MJPEG,
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#endif
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#if CONFIG_CBS_MPEG2
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AV_CODEC_ID_MPEG2VIDEO,
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#endif
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#if CONFIG_CBS_VP9
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AV_CODEC_ID_VP9,
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#endif
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AV_CODEC_ID_NONE
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};
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int ff_cbs_init(CodedBitstreamContext **ctx_ptr,
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enum AVCodecID codec_id, void *log_ctx)
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{
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CodedBitstreamContext *ctx;
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const CodedBitstreamType *type;
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int i;
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type = NULL;
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for (i = 0; i < FF_ARRAY_ELEMS(cbs_type_table); i++) {
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if (cbs_type_table[i]->codec_id == codec_id) {
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type = cbs_type_table[i];
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break;
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}
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}
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if (!type)
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return AVERROR(EINVAL);
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ctx = av_mallocz(sizeof(*ctx));
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if (!ctx)
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return AVERROR(ENOMEM);
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ctx->log_ctx = log_ctx;
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ctx->codec = type;
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if (type->priv_data_size) {
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ctx->priv_data = av_mallocz(ctx->codec->priv_data_size);
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if (!ctx->priv_data) {
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av_freep(&ctx);
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return AVERROR(ENOMEM);
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}
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}
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ctx->decompose_unit_types = NULL;
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ctx->trace_enable = 0;
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ctx->trace_level = AV_LOG_TRACE;
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*ctx_ptr = ctx;
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return 0;
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}
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void ff_cbs_close(CodedBitstreamContext **ctx_ptr)
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{
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CodedBitstreamContext *ctx = *ctx_ptr;
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if (!ctx)
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return;
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if (ctx->codec && ctx->codec->close)
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ctx->codec->close(ctx);
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av_freep(&ctx->write_buffer);
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av_freep(&ctx->priv_data);
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av_freep(ctx_ptr);
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}
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static void cbs_unit_uninit(CodedBitstreamContext *ctx,
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CodedBitstreamUnit *unit)
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{
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av_buffer_unref(&unit->content_ref);
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unit->content = NULL;
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av_buffer_unref(&unit->data_ref);
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unit->data = NULL;
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unit->data_size = 0;
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unit->data_bit_padding = 0;
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}
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void ff_cbs_fragment_reset(CodedBitstreamContext *ctx,
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CodedBitstreamFragment *frag)
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{
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int i;
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for (i = 0; i < frag->nb_units; i++)
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cbs_unit_uninit(ctx, &frag->units[i]);
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frag->nb_units = 0;
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av_buffer_unref(&frag->data_ref);
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frag->data = NULL;
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frag->data_size = 0;
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frag->data_bit_padding = 0;
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}
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void ff_cbs_fragment_free(CodedBitstreamContext *ctx,
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CodedBitstreamFragment *frag)
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{
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ff_cbs_fragment_reset(ctx, frag);
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av_freep(&frag->units);
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frag->nb_units_allocated = 0;
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}
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static int cbs_read_fragment_content(CodedBitstreamContext *ctx,
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CodedBitstreamFragment *frag)
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{
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int err, i, j;
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for (i = 0; i < frag->nb_units; i++) {
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CodedBitstreamUnit *unit = &frag->units[i];
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if (ctx->decompose_unit_types) {
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for (j = 0; j < ctx->nb_decompose_unit_types; j++) {
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if (ctx->decompose_unit_types[j] == unit->type)
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break;
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}
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if (j >= ctx->nb_decompose_unit_types)
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continue;
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}
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av_buffer_unref(&unit->content_ref);
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unit->content = NULL;
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av_assert0(unit->data && unit->data_ref);
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err = ctx->codec->read_unit(ctx, unit);
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if (err == AVERROR(ENOSYS)) {
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av_log(ctx->log_ctx, AV_LOG_VERBOSE,
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"Decomposition unimplemented for unit %d "
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"(type %"PRIu32").\n", i, unit->type);
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} else if (err < 0) {
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av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to read unit %d "
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"(type %"PRIu32").\n", i, unit->type);
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return err;
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}
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}
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return 0;
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}
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static int cbs_fill_fragment_data(CodedBitstreamContext *ctx,
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CodedBitstreamFragment *frag,
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const uint8_t *data, size_t size)
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{
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av_assert0(!frag->data && !frag->data_ref);
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frag->data_ref =
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av_buffer_alloc(size + AV_INPUT_BUFFER_PADDING_SIZE);
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if (!frag->data_ref)
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return AVERROR(ENOMEM);
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frag->data = frag->data_ref->data;
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frag->data_size = size;
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memcpy(frag->data, data, size);
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memset(frag->data + size, 0,
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AV_INPUT_BUFFER_PADDING_SIZE);
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return 0;
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}
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int ff_cbs_read_extradata(CodedBitstreamContext *ctx,
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CodedBitstreamFragment *frag,
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const AVCodecParameters *par)
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{
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int err;
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err = cbs_fill_fragment_data(ctx, frag, par->extradata,
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par->extradata_size);
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if (err < 0)
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return err;
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err = ctx->codec->split_fragment(ctx, frag, 1);
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if (err < 0)
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return err;
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return cbs_read_fragment_content(ctx, frag);
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}
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|
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int ff_cbs_read_packet(CodedBitstreamContext *ctx,
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CodedBitstreamFragment *frag,
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const AVPacket *pkt)
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{
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int err;
|
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|
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if (pkt->buf) {
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frag->data_ref = av_buffer_ref(pkt->buf);
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if (!frag->data_ref)
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return AVERROR(ENOMEM);
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|
|
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frag->data = pkt->data;
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frag->data_size = pkt->size;
|
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} else {
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err = cbs_fill_fragment_data(ctx, frag, pkt->data, pkt->size);
|
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if (err < 0)
|
||
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return err;
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||
|
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}
|
||
|
|
|
||
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err = ctx->codec->split_fragment(ctx, frag, 0);
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||
|
|
if (err < 0)
|
||
|
|
return err;
|
||
|
|
|
||
|
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return cbs_read_fragment_content(ctx, frag);
|
||
|
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}
|
||
|
|
|
||
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int ff_cbs_read(CodedBitstreamContext *ctx,
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|
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CodedBitstreamFragment *frag,
|
||
|
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const uint8_t *data, size_t size)
|
||
|
|
{
|
||
|
|
int err;
|
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|
|
|
||
|
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err = cbs_fill_fragment_data(ctx, frag, data, size);
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|
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if (err < 0)
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||
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return err;
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|
|
|
||
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err = ctx->codec->split_fragment(ctx, frag, 0);
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if (err < 0)
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return err;
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|
|
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return cbs_read_fragment_content(ctx, frag);
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|
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}
|
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|
|
|
||
|
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static int cbs_write_unit_data(CodedBitstreamContext *ctx,
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CodedBitstreamUnit *unit)
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|
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{
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|
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PutBitContext pbc;
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|
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int ret;
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|
|
|
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if (!ctx->write_buffer) {
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// Initial write buffer size is 1MB.
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ctx->write_buffer_size = 1024 * 1024;
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reallocate_and_try_again:
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ret = av_reallocp(&ctx->write_buffer, ctx->write_buffer_size);
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||
|
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if (ret < 0) {
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||
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av_log(ctx->log_ctx, AV_LOG_ERROR, "Unable to allocate a "
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|
|
"sufficiently large write buffer (last attempt "
|
||
|
|
"%"SIZE_SPECIFIER" bytes).\n", ctx->write_buffer_size);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
}
|
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|
|
|
||
|
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init_put_bits(&pbc, ctx->write_buffer, ctx->write_buffer_size);
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|
|
|
||
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ret = ctx->codec->write_unit(ctx, unit, &pbc);
|
||
|
|
if (ret < 0) {
|
||
|
|
if (ret == AVERROR(ENOSPC)) {
|
||
|
|
// Overflow.
|
||
|
|
if (ctx->write_buffer_size == INT_MAX / 8)
|
||
|
|
return AVERROR(ENOMEM);
|
||
|
|
ctx->write_buffer_size = FFMIN(2 * ctx->write_buffer_size, INT_MAX / 8);
|
||
|
|
goto reallocate_and_try_again;
|
||
|
|
}
|
||
|
|
// Write failed for some other reason.
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Overflow but we didn't notice.
|
||
|
|
av_assert0(put_bits_count(&pbc) <= 8 * ctx->write_buffer_size);
|
||
|
|
|
||
|
|
if (put_bits_count(&pbc) % 8)
|
||
|
|
unit->data_bit_padding = 8 - put_bits_count(&pbc) % 8;
|
||
|
|
else
|
||
|
|
unit->data_bit_padding = 0;
|
||
|
|
|
||
|
|
flush_put_bits(&pbc);
|
||
|
|
|
||
|
|
ret = ff_cbs_alloc_unit_data(ctx, unit, put_bits_count(&pbc) / 8);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
memcpy(unit->data, ctx->write_buffer, unit->data_size);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int ff_cbs_write_fragment_data(CodedBitstreamContext *ctx,
|
||
|
|
CodedBitstreamFragment *frag)
|
||
|
|
{
|
||
|
|
int err, i;
|
||
|
|
|
||
|
|
for (i = 0; i < frag->nb_units; i++) {
|
||
|
|
CodedBitstreamUnit *unit = &frag->units[i];
|
||
|
|
|
||
|
|
if (!unit->content)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
av_buffer_unref(&unit->data_ref);
|
||
|
|
unit->data = NULL;
|
||
|
|
|
||
|
|
err = cbs_write_unit_data(ctx, unit);
|
||
|
|
if (err < 0) {
|
||
|
|
av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to write unit %d "
|
||
|
|
"(type %"PRIu32").\n", i, unit->type);
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
av_assert0(unit->data && unit->data_ref);
|
||
|
|
}
|
||
|
|
|
||
|
|
av_buffer_unref(&frag->data_ref);
|
||
|
|
frag->data = NULL;
|
||
|
|
|
||
|
|
err = ctx->codec->assemble_fragment(ctx, frag);
|
||
|
|
if (err < 0) {
|
||
|
|
av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to assemble fragment.\n");
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
av_assert0(frag->data && frag->data_ref);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int ff_cbs_write_extradata(CodedBitstreamContext *ctx,
|
||
|
|
AVCodecParameters *par,
|
||
|
|
CodedBitstreamFragment *frag)
|
||
|
|
{
|
||
|
|
int err;
|
||
|
|
|
||
|
|
err = ff_cbs_write_fragment_data(ctx, frag);
|
||
|
|
if (err < 0)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
av_freep(&par->extradata);
|
||
|
|
|
||
|
|
par->extradata = av_malloc(frag->data_size +
|
||
|
|
AV_INPUT_BUFFER_PADDING_SIZE);
|
||
|
|
if (!par->extradata)
|
||
|
|
return AVERROR(ENOMEM);
|
||
|
|
|
||
|
|
memcpy(par->extradata, frag->data, frag->data_size);
|
||
|
|
memset(par->extradata + frag->data_size, 0,
|
||
|
|
AV_INPUT_BUFFER_PADDING_SIZE);
|
||
|
|
par->extradata_size = frag->data_size;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int ff_cbs_write_packet(CodedBitstreamContext *ctx,
|
||
|
|
AVPacket *pkt,
|
||
|
|
CodedBitstreamFragment *frag)
|
||
|
|
{
|
||
|
|
AVBufferRef *buf;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
err = ff_cbs_write_fragment_data(ctx, frag);
|
||
|
|
if (err < 0)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
buf = av_buffer_ref(frag->data_ref);
|
||
|
|
if (!buf)
|
||
|
|
return AVERROR(ENOMEM);
|
||
|
|
|
||
|
|
av_buffer_unref(&pkt->buf);
|
||
|
|
|
||
|
|
pkt->buf = buf;
|
||
|
|
pkt->data = frag->data;
|
||
|
|
pkt->size = frag->data_size;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void ff_cbs_trace_header(CodedBitstreamContext *ctx,
|
||
|
|
const char *name)
|
||
|
|
{
|
||
|
|
if (!ctx->trace_enable)
|
||
|
|
return;
|
||
|
|
|
||
|
|
av_log(ctx->log_ctx, ctx->trace_level, "%s\n", name);
|
||
|
|
}
|
||
|
|
|
||
|
|
void ff_cbs_trace_syntax_element(CodedBitstreamContext *ctx, int position,
|
||
|
|
const char *str, const int *subscripts,
|
||
|
|
const char *bits, int64_t value)
|
||
|
|
{
|
||
|
|
char name[256];
|
||
|
|
size_t name_len, bits_len;
|
||
|
|
int pad, subs, i, j, k, n;
|
||
|
|
|
||
|
|
if (!ctx->trace_enable)
|
||
|
|
return;
|
||
|
|
|
||
|
|
av_assert0(value >= INT_MIN && value <= UINT32_MAX);
|
||
|
|
|
||
|
|
subs = subscripts ? subscripts[0] : 0;
|
||
|
|
n = 0;
|
||
|
|
for (i = j = 0; str[i];) {
|
||
|
|
if (str[i] == '[') {
|
||
|
|
if (n < subs) {
|
||
|
|
++n;
|
||
|
|
k = snprintf(name + j, sizeof(name) - j, "[%d", subscripts[n]);
|
||
|
|
av_assert0(k > 0 && j + k < sizeof(name));
|
||
|
|
j += k;
|
||
|
|
for (++i; str[i] && str[i] != ']'; i++);
|
||
|
|
av_assert0(str[i] == ']');
|
||
|
|
} else {
|
||
|
|
while (str[i] && str[i] != ']')
|
||
|
|
name[j++] = str[i++];
|
||
|
|
av_assert0(str[i] == ']');
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
av_assert0(j + 1 < sizeof(name));
|
||
|
|
name[j++] = str[i++];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
av_assert0(j + 1 < sizeof(name));
|
||
|
|
name[j] = 0;
|
||
|
|
av_assert0(n == subs);
|
||
|
|
|
||
|
|
name_len = strlen(name);
|
||
|
|
bits_len = strlen(bits);
|
||
|
|
|
||
|
|
if (name_len + bits_len > 60)
|
||
|
|
pad = bits_len + 2;
|
||
|
|
else
|
||
|
|
pad = 61 - name_len;
|
||
|
|
|
||
|
|
av_log(ctx->log_ctx, ctx->trace_level, "%-10d %s%*s = %"PRId64"\n",
|
||
|
|
position, name, pad, bits, value);
|
||
|
|
}
|
||
|
|
|
||
|
|
int ff_cbs_read_unsigned(CodedBitstreamContext *ctx, GetBitContext *gbc,
|
||
|
|
int width, const char *name,
|
||
|
|
const int *subscripts, uint32_t *write_to,
|
||
|
|
uint32_t range_min, uint32_t range_max)
|
||
|
|
{
|
||
|
|
uint32_t value;
|
||
|
|
int position;
|
||
|
|
|
||
|
|
av_assert0(width > 0 && width <= 32);
|
||
|
|
|
||
|
|
if (get_bits_left(gbc) < width) {
|
||
|
|
av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid value at "
|
||
|
|
"%s: bitstream ended.\n", name);
|
||
|
|
return AVERROR_INVALIDDATA;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ctx->trace_enable)
|
||
|
|
position = get_bits_count(gbc);
|
||
|
|
|
||
|
|
value = get_bits_long(gbc, width);
|
||
|
|
|
||
|
|
if (ctx->trace_enable) {
|
||
|
|
char bits[33];
|
||
|
|
int i;
|
||
|
|
for (i = 0; i < width; i++)
|
||
|
|
bits[i] = value >> (width - i - 1) & 1 ? '1' : '0';
|
||
|
|
bits[i] = 0;
|
||
|
|
|
||
|
|
ff_cbs_trace_syntax_element(ctx, position, name, subscripts,
|
||
|
|
bits, value);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (value < range_min || value > range_max) {
|
||
|
|
av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
|
||
|
|
"%"PRIu32", but must be in [%"PRIu32",%"PRIu32"].\n",
|
||
|
|
name, value, range_min, range_max);
|
||
|
|
return AVERROR_INVALIDDATA;
|
||
|
|
}
|
||
|
|
|
||
|
|
*write_to = value;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int ff_cbs_write_unsigned(CodedBitstreamContext *ctx, PutBitContext *pbc,
|
||
|
|
int width, const char *name,
|
||
|
|
const int *subscripts, uint32_t value,
|
||
|
|
uint32_t range_min, uint32_t range_max)
|
||
|
|
{
|
||
|
|
av_assert0(width > 0 && width <= 32);
|
||
|
|
|
||
|
|
if (value < range_min || value > range_max) {
|
||
|
|
av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
|
||
|
|
"%"PRIu32", but must be in [%"PRIu32",%"PRIu32"].\n",
|
||
|
|
name, value, range_min, range_max);
|
||
|
|
return AVERROR_INVALIDDATA;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (put_bits_left(pbc) < width)
|
||
|
|
return AVERROR(ENOSPC);
|
||
|
|
|
||
|
|
if (ctx->trace_enable) {
|
||
|
|
char bits[33];
|
||
|
|
int i;
|
||
|
|
for (i = 0; i < width; i++)
|
||
|
|
bits[i] = value >> (width - i - 1) & 1 ? '1' : '0';
|
||
|
|
bits[i] = 0;
|
||
|
|
|
||
|
|
ff_cbs_trace_syntax_element(ctx, put_bits_count(pbc),
|
||
|
|
name, subscripts, bits, value);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (width < 32)
|
||
|
|
put_bits(pbc, width, value);
|
||
|
|
else
|
||
|
|
put_bits32(pbc, value);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int ff_cbs_read_signed(CodedBitstreamContext *ctx, GetBitContext *gbc,
|
||
|
|
int width, const char *name,
|
||
|
|
const int *subscripts, int32_t *write_to,
|
||
|
|
int32_t range_min, int32_t range_max)
|
||
|
|
{
|
||
|
|
int32_t value;
|
||
|
|
int position;
|
||
|
|
|
||
|
|
av_assert0(width > 0 && width <= 32);
|
||
|
|
|
||
|
|
if (get_bits_left(gbc) < width) {
|
||
|
|
av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid value at "
|
||
|
|
"%s: bitstream ended.\n", name);
|
||
|
|
return AVERROR_INVALIDDATA;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ctx->trace_enable)
|
||
|
|
position = get_bits_count(gbc);
|
||
|
|
|
||
|
|
value = get_sbits_long(gbc, width);
|
||
|
|
|
||
|
|
if (ctx->trace_enable) {
|
||
|
|
char bits[33];
|
||
|
|
int i;
|
||
|
|
for (i = 0; i < width; i++)
|
||
|
|
bits[i] = value & (1U << (width - i - 1)) ? '1' : '0';
|
||
|
|
bits[i] = 0;
|
||
|
|
|
||
|
|
ff_cbs_trace_syntax_element(ctx, position, name, subscripts,
|
||
|
|
bits, value);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (value < range_min || value > range_max) {
|
||
|
|
av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
|
||
|
|
"%"PRId32", but must be in [%"PRId32",%"PRId32"].\n",
|
||
|
|
name, value, range_min, range_max);
|
||
|
|
return AVERROR_INVALIDDATA;
|
||
|
|
}
|
||
|
|
|
||
|
|
*write_to = value;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int ff_cbs_write_signed(CodedBitstreamContext *ctx, PutBitContext *pbc,
|
||
|
|
int width, const char *name,
|
||
|
|
const int *subscripts, int32_t value,
|
||
|
|
int32_t range_min, int32_t range_max)
|
||
|
|
{
|
||
|
|
av_assert0(width > 0 && width <= 32);
|
||
|
|
|
||
|
|
if (value < range_min || value > range_max) {
|
||
|
|
av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
|
||
|
|
"%"PRId32", but must be in [%"PRId32",%"PRId32"].\n",
|
||
|
|
name, value, range_min, range_max);
|
||
|
|
return AVERROR_INVALIDDATA;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (put_bits_left(pbc) < width)
|
||
|
|
return AVERROR(ENOSPC);
|
||
|
|
|
||
|
|
if (ctx->trace_enable) {
|
||
|
|
char bits[33];
|
||
|
|
int i;
|
||
|
|
for (i = 0; i < width; i++)
|
||
|
|
bits[i] = value & (1U << (width - i - 1)) ? '1' : '0';
|
||
|
|
bits[i] = 0;
|
||
|
|
|
||
|
|
ff_cbs_trace_syntax_element(ctx, put_bits_count(pbc),
|
||
|
|
name, subscripts, bits, value);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (width < 32)
|
||
|
|
put_sbits(pbc, width, value);
|
||
|
|
else
|
||
|
|
put_bits32(pbc, value);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
int ff_cbs_alloc_unit_content(CodedBitstreamContext *ctx,
|
||
|
|
CodedBitstreamUnit *unit,
|
||
|
|
size_t size,
|
||
|
|
void (*free)(void *opaque, uint8_t *data))
|
||
|
|
{
|
||
|
|
av_assert0(!unit->content && !unit->content_ref);
|
||
|
|
|
||
|
|
unit->content = av_mallocz(size);
|
||
|
|
if (!unit->content)
|
||
|
|
return AVERROR(ENOMEM);
|
||
|
|
|
||
|
|
unit->content_ref = av_buffer_create(unit->content, size,
|
||
|
|
free, NULL, 0);
|
||
|
|
if (!unit->content_ref) {
|
||
|
|
av_freep(&unit->content);
|
||
|
|
return AVERROR(ENOMEM);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int ff_cbs_alloc_unit_data(CodedBitstreamContext *ctx,
|
||
|
|
CodedBitstreamUnit *unit,
|
||
|
|
size_t size)
|
||
|
|
{
|
||
|
|
av_assert0(!unit->data && !unit->data_ref);
|
||
|
|
|
||
|
|
unit->data_ref = av_buffer_alloc(size + AV_INPUT_BUFFER_PADDING_SIZE);
|
||
|
|
if (!unit->data_ref)
|
||
|
|
return AVERROR(ENOMEM);
|
||
|
|
|
||
|
|
unit->data = unit->data_ref->data;
|
||
|
|
unit->data_size = size;
|
||
|
|
|
||
|
|
memset(unit->data + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int cbs_insert_unit(CodedBitstreamContext *ctx,
|
||
|
|
CodedBitstreamFragment *frag,
|
||
|
|
int position)
|
||
|
|
{
|
||
|
|
CodedBitstreamUnit *units;
|
||
|
|
|
||
|
|
if (frag->nb_units < frag->nb_units_allocated) {
|
||
|
|
units = frag->units;
|
||
|
|
|
||
|
|
if (position < frag->nb_units)
|
||
|
|
memmove(units + position + 1, units + position,
|
||
|
|
(frag->nb_units - position) * sizeof(*units));
|
||
|
|
} else {
|
||
|
|
units = av_malloc_array(frag->nb_units*2 + 1, sizeof(*units));
|
||
|
|
if (!units)
|
||
|
|
return AVERROR(ENOMEM);
|
||
|
|
|
||
|
|
frag->nb_units_allocated = 2*frag->nb_units_allocated + 1;
|
||
|
|
|
||
|
|
if (position > 0)
|
||
|
|
memcpy(units, frag->units, position * sizeof(*units));
|
||
|
|
|
||
|
|
if (position < frag->nb_units)
|
||
|
|
memcpy(units + position + 1, frag->units + position,
|
||
|
|
(frag->nb_units - position) * sizeof(*units));
|
||
|
|
}
|
||
|
|
|
||
|
|
memset(units + position, 0, sizeof(*units));
|
||
|
|
|
||
|
|
if (units != frag->units) {
|
||
|
|
av_free(frag->units);
|
||
|
|
frag->units = units;
|
||
|
|
}
|
||
|
|
|
||
|
|
++frag->nb_units;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int ff_cbs_insert_unit_content(CodedBitstreamContext *ctx,
|
||
|
|
CodedBitstreamFragment *frag,
|
||
|
|
int position,
|
||
|
|
CodedBitstreamUnitType type,
|
||
|
|
void *content,
|
||
|
|
AVBufferRef *content_buf)
|
||
|
|
{
|
||
|
|
CodedBitstreamUnit *unit;
|
||
|
|
AVBufferRef *content_ref;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
if (position == -1)
|
||
|
|
position = frag->nb_units;
|
||
|
|
av_assert0(position >= 0 && position <= frag->nb_units);
|
||
|
|
|
||
|
|
if (content_buf) {
|
||
|
|
content_ref = av_buffer_ref(content_buf);
|
||
|
|
if (!content_ref)
|
||
|
|
return AVERROR(ENOMEM);
|
||
|
|
} else {
|
||
|
|
content_ref = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
err = cbs_insert_unit(ctx, frag, position);
|
||
|
|
if (err < 0) {
|
||
|
|
av_buffer_unref(&content_ref);
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
unit = &frag->units[position];
|
||
|
|
unit->type = type;
|
||
|
|
unit->content = content;
|
||
|
|
unit->content_ref = content_ref;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int ff_cbs_insert_unit_data(CodedBitstreamContext *ctx,
|
||
|
|
CodedBitstreamFragment *frag,
|
||
|
|
int position,
|
||
|
|
CodedBitstreamUnitType type,
|
||
|
|
uint8_t *data, size_t data_size,
|
||
|
|
AVBufferRef *data_buf)
|
||
|
|
{
|
||
|
|
CodedBitstreamUnit *unit;
|
||
|
|
AVBufferRef *data_ref;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
if (position == -1)
|
||
|
|
position = frag->nb_units;
|
||
|
|
av_assert0(position >= 0 && position <= frag->nb_units);
|
||
|
|
|
||
|
|
if (data_buf)
|
||
|
|
data_ref = av_buffer_ref(data_buf);
|
||
|
|
else
|
||
|
|
data_ref = av_buffer_create(data, data_size, NULL, NULL, 0);
|
||
|
|
if (!data_ref) {
|
||
|
|
if (!data_buf)
|
||
|
|
av_free(data);
|
||
|
|
return AVERROR(ENOMEM);
|
||
|
|
}
|
||
|
|
|
||
|
|
err = cbs_insert_unit(ctx, frag, position);
|
||
|
|
if (err < 0) {
|
||
|
|
av_buffer_unref(&data_ref);
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
unit = &frag->units[position];
|
||
|
|
unit->type = type;
|
||
|
|
unit->data = data;
|
||
|
|
unit->data_size = data_size;
|
||
|
|
unit->data_ref = data_ref;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
void ff_cbs_delete_unit(CodedBitstreamContext *ctx,
|
||
|
|
CodedBitstreamFragment *frag,
|
||
|
|
int position)
|
||
|
|
{
|
||
|
|
av_assert0(0 <= position && position < frag->nb_units
|
||
|
|
&& "Unit to be deleted not in fragment.");
|
||
|
|
|
||
|
|
cbs_unit_uninit(ctx, &frag->units[position]);
|
||
|
|
|
||
|
|
--frag->nb_units;
|
||
|
|
|
||
|
|
if (frag->nb_units > 0)
|
||
|
|
memmove(frag->units + position,
|
||
|
|
frag->units + position + 1,
|
||
|
|
(frag->nb_units - position) * sizeof(*frag->units));
|
||
|
|
}
|