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-rw-r--r--media/ffvpx/libavcodec/av1_parser.c216
1 files changed, 216 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/av1_parser.c b/media/ffvpx/libavcodec/av1_parser.c
new file mode 100644
index 0000000000..14dae92fe9
--- /dev/null
+++ b/media/ffvpx/libavcodec/av1_parser.c
@@ -0,0 +1,216 @@
+/*
+ * 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);
+ }
+
+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,
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-30 16:09:10 +0000