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/*
* Copyright (c) 2010, Google, Inc.
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* AV1 decoder support via libaom
*/
#include <aom/aom_decoder.h>
#include <aom/aomdx.h>
#include "libavutil/common.h"
#include "libavutil/imgutils.h"
#include "avcodec.h"
#include "internal.h"
#include "libaom.h"
typedef struct AV1DecodeContext {
struct aom_codec_ctx decoder;
} AV1DecodeContext;
static av_cold int aom_init(AVCodecContext *avctx)
{
AV1DecodeContext *ctx = avctx->priv_data;
struct aom_codec_dec_cfg deccfg = {
/* token partitions+1 would be a decent choice */
.threads = FFMIN(avctx->thread_count, 16)
};
const struct aom_codec_iface *iface = &aom_codec_av1_dx_algo;
av_log(avctx, AV_LOG_INFO, "%s\n", aom_codec_version_str());
av_log(avctx, AV_LOG_VERBOSE, "%s\n", aom_codec_build_config());
if (aom_codec_dec_init(&ctx->decoder, iface, &deccfg, 0) != AOM_CODEC_OK) {
const char *error = aom_codec_error(&ctx->decoder);
av_log(avctx, AV_LOG_ERROR, "Failed to initialize decoder: %s\n",
error);
return AVERROR(EINVAL);
}
return 0;
}
static void image_copy_16_to_8(AVFrame *pic, struct aom_image *img)
{
int i;
for (i = 0; i < 3; i++) {
int w = img->d_w;
int h = img->d_h;
int x, y;
if (i) {
w = (w + img->x_chroma_shift) >> img->x_chroma_shift;
h = (h + img->y_chroma_shift) >> img->y_chroma_shift;
}
for (y = 0; y < h; y++) {
uint16_t *src = (uint16_t *)(img->planes[i] + y * img->stride[i]);
uint8_t *dst = pic->data[i] + y * pic->linesize[i];
for (x = 0; x < w; x++)
*dst++ = *src++;
}
}
}
static int aom_decode(AVCodecContext *avctx, void *data, int *got_frame,
AVPacket *avpkt)
{
AV1DecodeContext *ctx = avctx->priv_data;
AVFrame *picture = data;
const void *iter = NULL;
struct aom_image *img;
int ret;
if (aom_codec_decode(&ctx->decoder, avpkt->data, avpkt->size, NULL) !=
AOM_CODEC_OK) {
const char *error = aom_codec_error(&ctx->decoder);
const char *detail = aom_codec_error_detail(&ctx->decoder);
av_log(avctx, AV_LOG_ERROR, "Failed to decode frame: %s\n", error);
if (detail)
av_log(avctx, AV_LOG_ERROR, " Additional information: %s\n",
detail);
return AVERROR_INVALIDDATA;
}
if ((img = aom_codec_get_frame(&ctx->decoder, &iter))) {
avctx->pix_fmt = ff_aom_imgfmt_to_pixfmt(img->fmt, img->bit_depth);
if (avctx->pix_fmt == AV_PIX_FMT_NONE) {
av_log(avctx, AV_LOG_ERROR, "Unsupported output colorspace (0x%02x %dbits)\n",
img->fmt, img->bit_depth);
return AVERROR_INVALIDDATA;
}
if ((int)img->d_w != avctx->width || (int)img->d_h != avctx->height) {
av_log(avctx, AV_LOG_INFO, "dimension change! %dx%d -> %dx%d\n",
avctx->width, avctx->height, img->d_w, img->d_h);
ret = ff_set_dimensions(avctx, img->d_w, img->d_h);
if (ret < 0)
return ret;
}
if ((ret = ff_get_buffer(avctx, picture, 0)) < 0)
return ret;
if ((img->fmt & AOM_IMG_FMT_HIGHBITDEPTH) && img->bit_depth == 8)
image_copy_16_to_8(picture, img);
else
av_image_copy(picture->data, picture->linesize, (const uint8_t **)img->planes,
img->stride, avctx->pix_fmt, img->d_w, img->d_h);
switch (img->range) {
case AOM_CR_STUDIO_RANGE:
picture->color_range = AVCOL_RANGE_MPEG;
break;
case AOM_CR_FULL_RANGE:
picture->color_range = AVCOL_RANGE_JPEG;
break;
}
*got_frame = 1;
}
return avpkt->size;
}
static av_cold int aom_free(AVCodecContext *avctx)
{
AV1DecodeContext *ctx = avctx->priv_data;
aom_codec_destroy(&ctx->decoder);
return 0;
}
AVCodec ff_libaom_av1_decoder = {
.name = "libaom-av1",
.long_name = NULL_IF_CONFIG_SMALL("libaom AV1"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_AV1,
.priv_data_size = sizeof(AV1DecodeContext),
.init = aom_init,
.close = aom_free,
.decode = aom_decode,
.capabilities = AV_CODEC_CAP_AUTO_THREADS | AV_CODEC_CAP_DR1,
.wrapper_name = "libaom",
};
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