mirror of https://github.com/FFmpeg/FFmpeg.git
* commit 'c438899a706422b8362a13714580e988be4d638b': Add AV1 video decoding support through libaom This contains some extra changes taken from the libvpx decoder wrapper, most of them contained in the set_pix_fmt() function. Merged-by: James Almer <jamrial@gmail.com>pull/283/head
James Almer
7 years ago
commit
0dc11d8bbd
6 changed files with 266 additions and 0 deletions
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/*
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* Copyright (c) 2010, Google, Inc. |
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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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/**
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* @file |
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* AV1 decoder support via libaom |
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*/ |
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#include <aom/aom_decoder.h> |
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#include <aom/aomdx.h> |
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#include "libavutil/common.h" |
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#include "libavutil/imgutils.h" |
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#include "avcodec.h" |
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#include "internal.h" |
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typedef struct AV1DecodeContext { |
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struct aom_codec_ctx decoder; |
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} AV1DecodeContext; |
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static av_cold int aom_init(AVCodecContext *avctx, |
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const struct aom_codec_iface *iface) |
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{ |
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AV1DecodeContext *ctx = avctx->priv_data; |
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struct aom_codec_dec_cfg deccfg = { |
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/* token partitions+1 would be a decent choice */ |
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.threads = FFMIN(avctx->thread_count, 16) |
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}; |
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av_log(avctx, AV_LOG_INFO, "%s\n", aom_codec_version_str()); |
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av_log(avctx, AV_LOG_VERBOSE, "%s\n", aom_codec_build_config()); |
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if (aom_codec_dec_init(&ctx->decoder, iface, &deccfg, 0) != AOM_CODEC_OK) { |
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const char *error = aom_codec_error(&ctx->decoder); |
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av_log(avctx, AV_LOG_ERROR, "Failed to initialize decoder: %s\n", |
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error); |
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return AVERROR(EINVAL); |
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} |
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return 0; |
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} |
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static void image_copy_16_to_8(AVFrame *pic, struct aom_image *img) |
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{ |
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int i; |
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for (i = 0; i < 3; i++) { |
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int w = img->d_w; |
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int h = img->d_h; |
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int x, y; |
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if (i) { |
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w = (w + img->x_chroma_shift) >> img->x_chroma_shift; |
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h = (h + img->y_chroma_shift) >> img->y_chroma_shift; |
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} |
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for (y = 0; y < h; y++) { |
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uint16_t *src = (uint16_t *)(img->planes[i] + y * img->stride[i]); |
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uint8_t *dst = pic->data[i] + y * pic->linesize[i]; |
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for (x = 0; x < w; x++) |
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*dst++ = *src++; |
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} |
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} |
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} |
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// returns 0 on success, AVERROR_INVALIDDATA otherwise
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static int set_pix_fmt(AVCodecContext *avctx, struct aom_image *img) |
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{ |
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static const enum AVColorSpace colorspaces[10] = { |
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AVCOL_SPC_UNSPECIFIED, AVCOL_SPC_BT470BG, AVCOL_SPC_BT709, AVCOL_SPC_SMPTE170M, |
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AVCOL_SPC_SMPTE240M, AVCOL_SPC_BT2020_NCL, AVCOL_SPC_BT2020_CL, AVCOL_SPC_RGB, |
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AVCOL_SPC_ICTCP, AVCOL_SPC_RESERVED |
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}; |
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static const enum AVColorRange color_ranges[] = { |
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AVCOL_RANGE_MPEG, AVCOL_RANGE_JPEG |
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}; |
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avctx->color_range = color_ranges[img->range]; |
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avctx->colorspace = colorspaces[img->cs]; |
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switch (img->fmt) { |
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case AOM_IMG_FMT_I420: |
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avctx->pix_fmt = AV_PIX_FMT_YUV420P; |
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return 0; |
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case AOM_IMG_FMT_I422: |
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avctx->pix_fmt = AV_PIX_FMT_YUV422P; |
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return 0; |
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case AOM_IMG_FMT_I440: |
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avctx->pix_fmt = AV_PIX_FMT_YUV440P; |
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return 0; |
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case AOM_IMG_FMT_I444: |
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avctx->pix_fmt = avctx->colorspace == AVCOL_SPC_RGB ? |
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AV_PIX_FMT_GBRP : AV_PIX_FMT_YUV444P; |
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return 0; |
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case AOM_IMG_FMT_I42016: |
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if (img->bit_depth == 8) { |
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avctx->pix_fmt = AV_PIX_FMT_YUV420P; |
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return 0; |
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} else if (img->bit_depth == 10) { |
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avctx->pix_fmt = AV_PIX_FMT_YUV420P10; |
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return 0; |
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} else if (img->bit_depth == 12) { |
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avctx->pix_fmt = AV_PIX_FMT_YUV420P12; |
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return 0; |
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} else { |
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return AVERROR_INVALIDDATA; |
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} |
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case AOM_IMG_FMT_I42216: |
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if (img->bit_depth == 8) { |
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avctx->pix_fmt = AV_PIX_FMT_YUV422P; |
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return 0; |
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} else if (img->bit_depth == 10) { |
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avctx->pix_fmt = AV_PIX_FMT_YUV422P10; |
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return 0; |
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} else if (img->bit_depth == 12) { |
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avctx->pix_fmt = AV_PIX_FMT_YUV422P12; |
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return 0; |
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} else { |
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return AVERROR_INVALIDDATA; |
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} |
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case AOM_IMG_FMT_I44016: |
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if (img->bit_depth == 8) { |
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avctx->pix_fmt = AV_PIX_FMT_YUV440P; |
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return 0; |
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} else if (img->bit_depth == 10) { |
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avctx->pix_fmt = AV_PIX_FMT_YUV440P10; |
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return 0; |
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} else if (img->bit_depth == 12) { |
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avctx->pix_fmt = AV_PIX_FMT_YUV440P12; |
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return 0; |
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} else { |
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return AVERROR_INVALIDDATA; |
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} |
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case AOM_IMG_FMT_I44416: |
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if (img->bit_depth == 8) { |
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avctx->pix_fmt = avctx->colorspace == AVCOL_SPC_RGB ? |
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AV_PIX_FMT_GBRP : AV_PIX_FMT_YUV444P; |
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return 0; |
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} else if (img->bit_depth == 10) { |
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avctx->pix_fmt = avctx->colorspace == AVCOL_SPC_RGB ? |
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AV_PIX_FMT_GBRP10 : AV_PIX_FMT_YUV444P10; |
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return 0; |
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} else if (img->bit_depth == 12) { |
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avctx->pix_fmt = avctx->colorspace == AVCOL_SPC_RGB ? |
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AV_PIX_FMT_GBRP12 : AV_PIX_FMT_YUV444P12; |
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return 0; |
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} else { |
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return AVERROR_INVALIDDATA; |
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} |
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default: |
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return AVERROR_INVALIDDATA; |
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} |
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} |
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static int aom_decode(AVCodecContext *avctx, void *data, int *got_frame, |
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AVPacket *avpkt) |
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{ |
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AV1DecodeContext *ctx = avctx->priv_data; |
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AVFrame *picture = data; |
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const void *iter = NULL; |
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struct aom_image *img; |
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int ret; |
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if (aom_codec_decode(&ctx->decoder, avpkt->data, avpkt->size, NULL) != |
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AOM_CODEC_OK) { |
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const char *error = aom_codec_error(&ctx->decoder); |
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const char *detail = aom_codec_error_detail(&ctx->decoder); |
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av_log(avctx, AV_LOG_ERROR, "Failed to decode frame: %s\n", error); |
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if (detail) |
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av_log(avctx, AV_LOG_ERROR, " Additional information: %s\n", |
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detail); |
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return AVERROR_INVALIDDATA; |
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} |
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if ((img = aom_codec_get_frame(&ctx->decoder, &iter))) { |
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if (img->d_w > img->w || img->d_h > img->h) { |
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av_log(avctx, AV_LOG_ERROR, "Display dimensions %dx%d exceed storage %dx%d\n", |
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img->d_w, img->d_h, img->w, img->h); |
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return AVERROR_EXTERNAL; |
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} |
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if ((ret = set_pix_fmt(avctx, img)) < 0) { |
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av_log(avctx, AV_LOG_ERROR, "Unsupported output colorspace (%d) / bit_depth (%d)\n", |
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img->fmt, img->bit_depth); |
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return ret; |
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} |
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if ((int)img->d_w != avctx->width || (int)img->d_h != avctx->height) { |
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av_log(avctx, AV_LOG_INFO, "dimension change! %dx%d -> %dx%d\n", |
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avctx->width, avctx->height, img->d_w, img->d_h); |
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ret = ff_set_dimensions(avctx, img->d_w, img->d_h); |
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if (ret < 0) |
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return ret; |
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} |
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if ((ret = ff_get_buffer(avctx, picture, 0)) < 0) |
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return ret; |
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if ((img->fmt & AOM_IMG_FMT_HIGHBITDEPTH) && img->bit_depth == 8) |
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image_copy_16_to_8(picture, img); |
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else |
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av_image_copy(picture->data, picture->linesize, (const uint8_t **)img->planes, |
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img->stride, avctx->pix_fmt, img->d_w, img->d_h); |
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*got_frame = 1; |
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} |
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return avpkt->size; |
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} |
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static av_cold int aom_free(AVCodecContext *avctx) |
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{ |
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AV1DecodeContext *ctx = avctx->priv_data; |
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aom_codec_destroy(&ctx->decoder); |
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return 0; |
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} |
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static av_cold int av1_init(AVCodecContext *avctx) |
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{ |
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return aom_init(avctx, &aom_codec_av1_dx_algo); |
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} |
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AVCodec ff_libaom_av1_decoder = { |
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.name = "libaom-av1", |
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.long_name = NULL_IF_CONFIG_SMALL("libaom AV1"), |
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.type = AVMEDIA_TYPE_VIDEO, |
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.id = AV_CODEC_ID_AV1, |
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.priv_data_size = sizeof(AV1DecodeContext), |
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.init = av1_init, |
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.close = aom_free, |
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.decode = aom_decode, |
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.capabilities = AV_CODEC_CAP_AUTO_THREADS | AV_CODEC_CAP_DR1, |
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.wrapper_name = "libaom", |
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}; |
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