/* * AV1 parser * * Copyright (C) 2018 James Almer <jamrial@gmail.com> * * 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 "libavutil/avassert.h"#include "cbs.h"#include "cbs_av1.h"#include "parser.h" typedef struct AV1ParseContext {    CodedBitstreamContext *cbc;    CodedBitstreamFragment temporal_unit;    int parsed_extradata;} AV1ParseContext; static const enum AVPixelFormat pix_fmts_8bit[2][2] = {    { AV_PIX_FMT_YUV444P, AV_PIX_FMT_NONE },    { AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P },};static const enum AVPixelFormat pix_fmts_10bit[2][2] = {    { AV_PIX_FMT_YUV444P10, AV_PIX_FMT_NONE },    { AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV420P10 },};static const enum AVPixelFormat pix_fmts_12bit[2][2] = {    { AV_PIX_FMT_YUV444P12, AV_PIX_FMT_NONE },    { AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12 },}; static const enum AVPixelFormat pix_fmts_rgb[3] = {    AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP12,}; static int av1_parser_parse(AVCodecParserContext *ctx,                            AVCodecContext *avctx,                            const uint8_t **out_data, int *out_size,                            const uint8_t *data, int size){    AV1ParseContext *s = ctx->priv_data;    CodedBitstreamFragment *td = &s->temporal_unit;    const CodedBitstreamAV1Context *av1 = s->cbc->priv_data;    const AV1RawSequenceHeader *seq;    const AV1RawColorConfig *color;    int ret;     *out_data = data;    *out_size = size;     ctx->key_frame         = -1;    ctx->pict_type         = AV_PICTURE_TYPE_NONE;    ctx->picture_structure = AV_PICTURE_STRUCTURE_UNKNOWN;     s->cbc->log_ctx = avctx;     if (avctx->extradata_size && !s->parsed_extradata) {        s->parsed_extradata = 1;         ret = ff_cbs_read_extradata_from_codec(s->cbc, td, avctx);        if (ret < 0) {            av_log(avctx, AV_LOG_WARNING, "Failed to parse extradata.\n");        }         ff_cbs_fragment_reset(td);    }     ret = ff_cbs_read(s->cbc, td, data, size);    if (ret < 0) {        av_log(avctx, AV_LOG_ERROR, "Failed to parse temporal unit.\n");        goto end;    }     if (!av1->sequence_header) {        av_log(avctx, AV_LOG_ERROR, "No sequence header available\n");        goto end;    }     seq = av1->sequence_header;    color = &seq->color_config;     for (int i = 0; i < td->nb_units; i++) {        const CodedBitstreamUnit *unit = &td->units[i];        const AV1RawOBU *obu = unit->content;        const AV1RawFrameHeader *frame;         if (unit->type == AV1_OBU_FRAME)            frame = &obu->obu.frame.header;        else if (unit->type == AV1_OBU_FRAME_HEADER)            frame = &obu->obu.frame_header;        else            continue;         if (obu->header.spatial_id > 0)            continue;         if (!frame->show_frame && !frame->show_existing_frame)            continue;         ctx->width  = frame->frame_width_minus_1 + 1;        ctx->height = frame->frame_height_minus_1 + 1;         ctx->key_frame = frame->frame_type == AV1_FRAME_KEY && !frame->show_existing_frame;         switch (frame->frame_type) {        case AV1_FRAME_KEY:        case AV1_FRAME_INTRA_ONLY:            ctx->pict_type = AV_PICTURE_TYPE_I;            break;        case AV1_FRAME_INTER:            ctx->pict_type = AV_PICTURE_TYPE_P;            break;        case AV1_FRAME_SWITCH:            ctx->pict_type = AV_PICTURE_TYPE_SP;            break;        }        ctx->picture_structure = AV_PICTURE_STRUCTURE_FRAME;    }     switch (av1->bit_depth) {    case 8:        ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY8                                         : pix_fmts_8bit [color->subsampling_x][color->subsampling_y];        break;    case 10:        ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY10                                         : pix_fmts_10bit[color->subsampling_x][color->subsampling_y];        break;    case 12:        ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY12                                         : pix_fmts_12bit[color->subsampling_x][color->subsampling_y];        break;    }    av_assert2(ctx->format != AV_PIX_FMT_NONE);     if (!color->subsampling_x && !color->subsampling_y &&        color->matrix_coefficients       == AVCOL_SPC_RGB &&        color->color_primaries           == AVCOL_PRI_BT709 &&        color->transfer_characteristics  == AVCOL_TRC_IEC61966_2_1)        ctx->format = pix_fmts_rgb[color->high_bitdepth + color->twelve_bit];     avctx->profile = seq->seq_profile;    avctx->level   = seq->seq_level_idx[0];     avctx->colorspace = (enum AVColorSpace) color->matrix_coefficients;    avctx->color_primaries = (enum AVColorPrimaries) color->color_primaries;    avctx->color_trc = (enum AVColorTransferCharacteristic) color->transfer_characteristics;    avctx->color_range = color->color_range ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;     if (seq->timing_info_present_flag) {        const AV1RawTimingInfo *timing = &seq->timing_info;        av_reduce(&avctx->framerate.den, &avctx->framerate.num,                  timing->num_units_in_display_tick, timing->time_scale, INT_MAX);    }     if (avctx->framerate.num)        avctx->time_base = av_inv_q(av_mul_q(avctx->framerate, (AVRational){avctx->ticks_per_frame, 1})); end:    ff_cbs_fragment_reset(td);     s->cbc->log_ctx = NULL;     return size;} static const CodedBitstreamUnitType decompose_unit_types[] = {    AV1_OBU_TEMPORAL_DELIMITER,    AV1_OBU_SEQUENCE_HEADER,    AV1_OBU_FRAME_HEADER,    AV1_OBU_TILE_GROUP,    AV1_OBU_FRAME,}; static av_cold int av1_parser_init(AVCodecParserContext *ctx){    AV1ParseContext *s = ctx->priv_data;    int ret;     ret = ff_cbs_init(&s->cbc, AV_CODEC_ID_AV1, NULL);    if (ret < 0)        return ret;     s->cbc->decompose_unit_types    = decompose_unit_types;    s->cbc->nb_decompose_unit_types = FF_ARRAY_ELEMS(decompose_unit_types);     return 0;} static void av1_parser_close(AVCodecParserContext *ctx){    AV1ParseContext *s = ctx->priv_data;     ff_cbs_fragment_free(&s->temporal_unit);    ff_cbs_close(&s->cbc);} const AVCodecParser ff_av1_parser = {    .codec_ids      = { AV_CODEC_ID_AV1 },    .priv_data_size = sizeof(AV1ParseContext),    .parser_init    = av1_parser_init,    .parser_close   = av1_parser_close,    .parser_parse   = av1_parser_parse,};