GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/av1_parser.c Lines: 93 122 76.2 %
Date: 2020-07-11 02:49:52 Branches: 36 68 52.9 %

Line Branch Exec Source
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/*
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 * AV1 parser
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 *
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 * Copyright (C) 2018 James Almer <jamrial@gmail.com>
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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 "av1_parse.h"
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#include "cbs.h"
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#include "cbs_av1.h"
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#include "internal.h"
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#include "parser.h"
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29
typedef struct AV1ParseContext {
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    CodedBitstreamContext *cbc;
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    CodedBitstreamFragment temporal_unit;
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    int parsed_extradata;
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} AV1ParseContext;
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static const enum AVPixelFormat pix_fmts_8bit[2][2] = {
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    { AV_PIX_FMT_YUV444P, AV_PIX_FMT_NONE },
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    { AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P },
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};
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static const enum AVPixelFormat pix_fmts_10bit[2][2] = {
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    { AV_PIX_FMT_YUV444P10, AV_PIX_FMT_NONE },
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    { AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV420P10 },
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};
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static const enum AVPixelFormat pix_fmts_12bit[2][2] = {
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    { AV_PIX_FMT_YUV444P12, AV_PIX_FMT_NONE },
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    { AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12 },
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};
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static const enum AVPixelFormat pix_fmts_rgb[3] = {
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    AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP12,
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};
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370
static int av1_parser_parse(AVCodecParserContext *ctx,
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                            AVCodecContext *avctx,
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                            const uint8_t **out_data, int *out_size,
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                            const uint8_t *data, int size)
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{
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370
    AV1ParseContext *s = ctx->priv_data;
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370
    CodedBitstreamFragment *td = &s->temporal_unit;
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370
    CodedBitstreamAV1Context *av1 = s->cbc->priv_data;
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    AV1RawSequenceHeader *seq;
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    AV1RawColorConfig *color;
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    int ret;
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64
370
    *out_data = data;
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370
    *out_size = size;
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67
370
    ctx->key_frame         = -1;
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370
    ctx->pict_type         = AV_PICTURE_TYPE_NONE;
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370
    ctx->picture_structure = AV_PICTURE_STRUCTURE_UNKNOWN;
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71
370
    s->cbc->log_ctx = avctx;
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73

370
    if (avctx->extradata_size && !s->parsed_extradata) {
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21
        s->parsed_extradata = 1;
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76
21
        ret = ff_cbs_read(s->cbc, td, avctx->extradata, avctx->extradata_size);
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21
        if (ret < 0) {
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            av_log(avctx, AV_LOG_WARNING, "Failed to parse extradata.\n");
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        }
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81
21
        ff_cbs_fragment_reset(td);
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    }
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84
370
    ret = ff_cbs_read(s->cbc, td, data, size);
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370
    if (ret < 0) {
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        av_log(avctx, AV_LOG_ERROR, "Failed to parse temporal unit.\n");
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        goto end;
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    }
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90
370
    if (!av1->sequence_header) {
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        av_log(avctx, AV_LOG_ERROR, "No sequence header available\n");
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        goto end;
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    }
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370
    seq = av1->sequence_header;
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370
    color = &seq->color_config;
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1393
    for (int i = 0; i < td->nb_units; i++) {
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1023
        CodedBitstreamUnit *unit = &td->units[i];
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1023
        AV1RawOBU *obu = unit->content;
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        AV1RawFrameHeader *frame;
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        int frame_type;
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104
1023
        if (unit->type == AV1_OBU_FRAME)
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346
            frame = &obu->obu.frame.header;
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677
        else if (unit->type == AV1_OBU_FRAME_HEADER)
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90
            frame = &obu->obu.frame_header;
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        else
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587
            continue;
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111
436
        if (obu->header.spatial_id > 0)
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16
            continue;
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420
        if (frame->show_existing_frame) {
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50
            AV1ReferenceFrameState *ref = &av1->ref[frame->frame_to_show_map_idx];
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117
50
            if (!ref->valid) {
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                av_log(avctx, AV_LOG_ERROR, "Invalid reference frame\n");
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                goto end;
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            }
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122
50
            ctx->width  = ref->frame_width;
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50
            ctx->height = ref->frame_height;
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50
            frame_type  = ref->frame_type;
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126
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            ctx->key_frame = 0;
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370
        } else if (!frame->show_frame) {
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71
            continue;
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        } else {
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299
            ctx->width  = av1->frame_width;
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            ctx->height = av1->frame_height;
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299
            frame_type  = frame->frame_type;
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134
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            ctx->key_frame = frame_type == AV1_FRAME_KEY;
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        }
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137

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        switch (frame_type) {
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        case AV1_FRAME_KEY:
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        case AV1_FRAME_INTRA_ONLY:
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            ctx->pict_type = AV_PICTURE_TYPE_I;
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61
            break;
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287
        case AV1_FRAME_INTER:
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287
            ctx->pict_type = AV_PICTURE_TYPE_P;
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287
            break;
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1
        case AV1_FRAME_SWITCH:
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1
            ctx->pict_type = AV_PICTURE_TYPE_SP;
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1
            break;
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        }
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349
        ctx->picture_structure = AV_PICTURE_STRUCTURE_FRAME;
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    }
151
152

370
    switch (av1->bit_depth) {
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359
    case 8:
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718
        ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY8
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359
                                         : pix_fmts_8bit [color->subsampling_x][color->subsampling_y];
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359
        break;
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11
    case 10:
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22
        ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY10
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11
                                         : pix_fmts_10bit[color->subsampling_x][color->subsampling_y];
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11
        break;
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    case 12:
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        ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY12
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                                         : pix_fmts_12bit[color->subsampling_x][color->subsampling_y];
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        break;
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    }
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370
    av_assert2(ctx->format != AV_PIX_FMT_NONE);
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168

370
    if (!color->subsampling_x && !color->subsampling_y &&
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        color->matrix_coefficients       == AVCOL_SPC_RGB &&
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        color->color_primaries           == AVCOL_PRI_BT709 &&
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        color->transfer_characteristics  == AVCOL_TRC_IEC61966_2_1)
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        ctx->format = pix_fmts_rgb[color->high_bitdepth + color->twelve_bit];
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174
370
    avctx->pix_fmt = ctx->format;
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176
370
    avctx->profile = seq->seq_profile;
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370
    avctx->level   = seq->seq_level_idx[0];
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179
370
    avctx->colorspace = (enum AVColorSpace) color->matrix_coefficients;
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370
    avctx->color_primaries = (enum AVColorPrimaries) color->color_primaries;
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370
    avctx->color_trc = (enum AVColorTransferCharacteristic) color->transfer_characteristics;
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370
    avctx->color_range = color->color_range ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
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184

370
    if (ctx->width != avctx->width || ctx->height != avctx->height) {
185
4
        ret = ff_set_dimensions(avctx, ctx->width, ctx->height);
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4
        if (ret < 0)
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            goto end;
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    }
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190
370
    if (avctx->framerate.num)
191
12
        avctx->time_base = av_inv_q(av_mul_q(avctx->framerate, (AVRational){avctx->ticks_per_frame, 1}));
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193
358
end:
194
370
    ff_cbs_fragment_reset(td);
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196
370
    s->cbc->log_ctx = NULL;
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198
370
    return size;
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}
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static const CodedBitstreamUnitType decompose_unit_types[] = {
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    AV1_OBU_TEMPORAL_DELIMITER,
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    AV1_OBU_SEQUENCE_HEADER,
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    AV1_OBU_FRAME_HEADER,
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    AV1_OBU_TILE_GROUP,
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    AV1_OBU_FRAME,
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};
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209
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static av_cold int av1_parser_init(AVCodecParserContext *ctx)
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{
211
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    AV1ParseContext *s = ctx->priv_data;
212
    int ret;
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214
22
    ret = ff_cbs_init(&s->cbc, AV_CODEC_ID_AV1, NULL);
215
22
    if (ret < 0)
216
        return ret;
217
218
22
    s->cbc->decompose_unit_types    = (CodedBitstreamUnitType *)decompose_unit_types;
219
22
    s->cbc->nb_decompose_unit_types = FF_ARRAY_ELEMS(decompose_unit_types);
220
221
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    return 0;
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}
223
224
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static void av1_parser_close(AVCodecParserContext *ctx)
225
{
226
22
    AV1ParseContext *s = ctx->priv_data;
227
228
22
    ff_cbs_fragment_free(&s->temporal_unit);
229
22
    ff_cbs_close(&s->cbc);
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22
}
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232
static int av1_parser_split(AVCodecContext *avctx,
233
                            const uint8_t *buf, int buf_size)
234
{
235
    AV1OBU obu;
236
    const uint8_t *ptr = buf, *end = buf + buf_size;
237
238
    while (ptr < end) {
239
        int len = ff_av1_extract_obu(&obu, ptr, buf_size, avctx);
240
        if (len < 0)
241
            break;
242
243
        if (obu.type == AV1_OBU_FRAME_HEADER ||
244
            obu.type == AV1_OBU_FRAME) {
245
            return ptr - buf;
246
        }
247
        ptr      += len;
248
        buf_size -= len;
249
    }
250
251
    return 0;
252
}
253
254
AVCodecParser ff_av1_parser = {
255
    .codec_ids      = { AV_CODEC_ID_AV1 },
256
    .priv_data_size = sizeof(AV1ParseContext),
257
    .parser_init    = av1_parser_init,
258
    .parser_close   = av1_parser_close,
259
    .parser_parse   = av1_parser_parse,
260
    .split          = av1_parser_split,
261
};