avcodec: add an AV1 parser

Simple parser to set keyframes, frame type, structure, width, height, and pixel
format, plus stream profile and level.
Reviewed-by: Mark Thompson <sw@jkqxz.net>
Signed-off-by: James Almer <jamrial@gmail.com>

Changelog

@@ -32,6 +32,7 @@ version <next>:
 - acrossover filter
 - ilbc decoder
 - audio denoiser as afftdn filter
+- AV1 parser
 
 
 version 4.0:

configure

@@ -3020,6 +3020,7 @@ wmv3_crystalhd_decoder_select="crystalhd"
 
 # parsers
 aac_parser_select="adts_header"
+av1_parser_select="cbs_av1"
 h264_parser_select="golomb h264dsp h264parse"
 hevc_parser_select="hevcparse"
 mpegaudio_parser_select="mpegaudioheader"

libavcodec/Makefile

@@ -1006,6 +1006,7 @@ OBJS-$(CONFIG_AAC_PARSER)              += aac_parser.o aac_ac3_parser.o \
                                           mpeg4audio.o
 OBJS-$(CONFIG_AC3_PARSER)              += ac3tab.o aac_ac3_parser.o
 OBJS-$(CONFIG_ADX_PARSER)              += adx_parser.o adx.o
+OBJS-$(CONFIG_AV1_PARSER)              += av1_parser.o av1_parse.o
 OBJS-$(CONFIG_AVS2_PARSER)             += avs2_parser.o
 OBJS-$(CONFIG_BMP_PARSER)              += bmp_parser.o
 OBJS-$(CONFIG_CAVSVIDEO_PARSER)        += cavs_parser.o

libavcodec/av1_parser.c

+/*
+ * 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 "av1_parse.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 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;
+    CodedBitstreamAV1Context *av1 = s->cbc->priv_data;
+    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(s->cbc, td, avctx->extradata, avctx->extradata_size);
+        if (ret < 0) {
+            av_log(avctx, AV_LOG_ERROR, "Failed to parse extradata.\n");
+            goto end;
+        }
+
+        ff_cbs_fragment_uninit(s->cbc, 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;
+    }
+
+    for (int i = 0; i < td->nb_units; i++) {
+        CodedBitstreamUnit *unit = &td->units[i];
+        AV1RawOBU *obu = unit->content;
+        AV1RawSequenceHeader *seq = av1->sequence_header;
+        AV1RawColorConfig *color = &seq->color_config;
+        AV1RawFrameHeader *frame;
+        int frame_type;
+
+        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 (frame->show_existing_frame) {
+            AV1ReferenceFrameState *ref = &av1->ref[frame->frame_to_show_map_idx];
+
+            if (!ref->valid) {
+                av_log(avctx, AV_LOG_ERROR, "Invalid reference frame\n");
+                goto end;
+            }
+
+            ctx->width  = ref->frame_width;
+            ctx->height = ref->frame_height;
+            frame_type  = ref->frame_type;
+
+            ctx->key_frame = 0;
+        } else if (!frame->show_frame) {
+            continue;
+        } else {
+            ctx->width  = av1->frame_width;
+            ctx->height = av1->frame_height;
+            frame_type  = frame->frame_type;
+
+            ctx->key_frame = frame_type == AV1_FRAME_KEY;
+        }
+
+        avctx->profile = seq->seq_profile;
+        avctx->level   = seq->seq_level_idx[0];
+
+        switch (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);
+    }
+
+end:
+    ff_cbs_fragment_uninit(s->cbc, 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    = (CodedBitstreamUnitType *)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_close(&s->cbc);
+}
+
+static int av1_parser_split(AVCodecContext *avctx,
+                            const uint8_t *buf, int buf_size)
+{
+    AV1OBU obu;
+    const uint8_t *ptr = buf, *end = buf + buf_size;
+
+    while (ptr < end) {
+        int len = ff_av1_extract_obu(&obu, ptr, buf_size, avctx);
+        if (len < 0)
+            break;
+
+        if (obu.type == AV1_OBU_FRAME_HEADER ||
+            obu.type == AV1_OBU_FRAME) {
+            return ptr - buf;
+        }
+        ptr      += len;
+        buf_size -= len;
+    }
+
+    return 0;
+}
+
+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,
+    .split          = av1_parser_split,
+};

libavcodec/parsers.c

@@ -26,6 +26,7 @@ extern AVCodecParser ff_aac_parser;
 extern AVCodecParser ff_aac_latm_parser;
 extern AVCodecParser ff_ac3_parser;
 extern AVCodecParser ff_adx_parser;
+extern AVCodecParser ff_av1_parser;
 extern AVCodecParser ff_avs2_parser;
 extern AVCodecParser ff_bmp_parser;
 extern AVCodecParser ff_cavsvideo_parser;

libavcodec/version.h

@@ -28,8 +28,8 @@
 #include "libavutil/version.h"
 
 #define LIBAVCODEC_VERSION_MAJOR  58
-#define LIBAVCODEC_VERSION_MINOR  31
-#define LIBAVCODEC_VERSION_MICRO 102
+#define LIBAVCODEC_VERSION_MINOR  32
+#define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \