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8a129077cc37202a00dd666bd5365c3f61ea2e80
FFmpeg/libavcodec/libaomdec.c
Anton Khirnov 8a129077cc lavc: replace internal use of AV_CODEC_CAP_AUTO_THREADS with an internal cap 
AV_CODEC_CAP_AUTO_THREADS was originally added in b4d44a45f9 to mark
codecs that spawn threads internally and are able to select an optimal
threads count by themselves (all such codecs are wrappers around
external libraries). It is used by lavc generic code to check whether it
should handle thread_count=0 itself or pass the zero directly to the
codec implementation. Within this meaning, it is clearly supposed to be
an internal cap rather than a public one, since from the viewpoint of a
libavcodec user, lavc ALWAYS handles thread_count=0. Whether it happens
in the generic code or within the codec internals is not a meaningful
difference for the caller.

External aspects of this flag will be dealt with in the following
commit.
2021-03-16 10:34:29 +01:00

244 lines
8.1 KiB
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/*
* Copyright (c) 2010, Google, Inc.
*
* 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
*/
/**
* @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 "profiles.h"
typedef struct AV1DecodeContext {
struct aom_codec_ctx decoder;
} AV1DecodeContext;
static av_cold int aom_init(AVCodecContext *avctx,
const struct aom_codec_iface *iface)
{
AV1DecodeContext *ctx = avctx->priv_data;
struct aom_codec_dec_cfg deccfg = {
.threads = FFMIN(avctx->thread_count ? avctx->thread_count : av_cpu_count(), 16)
};
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)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pic->format);
int i;
for (i = 0; i < desc->nb_components; 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++;
}
}
}
// returns 0 on success, AVERROR_INVALIDDATA otherwise
static int set_pix_fmt(AVCodecContext *avctx, struct aom_image *img)
{
static const enum AVColorRange color_ranges[] = {
AVCOL_RANGE_MPEG, AVCOL_RANGE_JPEG
};
avctx->color_range = color_ranges[img->range];
avctx->color_primaries = img->cp;
avctx->colorspace = img->mc;
avctx->color_trc = img->tc;
switch (img->fmt) {
case AOM_IMG_FMT_I420:
case AOM_IMG_FMT_I42016:
if (img->bit_depth == 8) {
avctx->pix_fmt = img->monochrome ?
AV_PIX_FMT_GRAY8 : AV_PIX_FMT_YUV420P;
avctx->profile = FF_PROFILE_AV1_MAIN;
return 0;
} else if (img->bit_depth == 10) {
avctx->pix_fmt = img->monochrome ?
AV_PIX_FMT_GRAY10 : AV_PIX_FMT_YUV420P10;
avctx->profile = FF_PROFILE_AV1_MAIN;
return 0;
} else if (img->bit_depth == 12) {
avctx->pix_fmt = img->monochrome ?
AV_PIX_FMT_GRAY12 : AV_PIX_FMT_YUV420P12;
avctx->profile = FF_PROFILE_AV1_PROFESSIONAL;
return 0;
} else {
return AVERROR_INVALIDDATA;
}
case AOM_IMG_FMT_I422:
case AOM_IMG_FMT_I42216:
if (img->bit_depth == 8) {
avctx->pix_fmt = AV_PIX_FMT_YUV422P;
avctx->profile = FF_PROFILE_AV1_PROFESSIONAL;
return 0;
} else if (img->bit_depth == 10) {
avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
avctx->profile = FF_PROFILE_AV1_PROFESSIONAL;
return 0;
} else if (img->bit_depth == 12) {
avctx->pix_fmt = AV_PIX_FMT_YUV422P12;
avctx->profile = FF_PROFILE_AV1_PROFESSIONAL;
return 0;
} else {
return AVERROR_INVALIDDATA;
}
case AOM_IMG_FMT_I444:
case AOM_IMG_FMT_I44416:
if (img->bit_depth == 8) {
avctx->pix_fmt = AV_PIX_FMT_YUV444P;
avctx->profile = FF_PROFILE_AV1_HIGH;
return 0;
} else if (img->bit_depth == 10) {
avctx->pix_fmt = AV_PIX_FMT_YUV444P10;
avctx->profile = FF_PROFILE_AV1_HIGH;
return 0;
} else if (img->bit_depth == 12) {
avctx->pix_fmt = AV_PIX_FMT_YUV444P12;
avctx->profile = FF_PROFILE_AV1_PROFESSIONAL;
return 0;
} else {
return AVERROR_INVALIDDATA;
}
default:
return AVERROR_INVALIDDATA;
}
}
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))) {
if (img->d_w > img->w || img->d_h > img->h) {
av_log(avctx, AV_LOG_ERROR, "Display dimensions %dx%d exceed storage %dx%d\n",
img->d_w, img->d_h, img->w, img->h);
return AVERROR_EXTERNAL;
}
if ((ret = set_pix_fmt(avctx, img)) < 0) {
av_log(avctx, AV_LOG_ERROR, "Unsupported output colorspace (%d) / bit_depth (%d)\n",
img->fmt, img->bit_depth);
return ret;
}
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;
av_reduce(&picture->sample_aspect_ratio.num,
&picture->sample_aspect_ratio.den,
picture->height * img->r_w,
picture->width * img->r_h,
INT_MAX);
ff_set_sar(avctx, picture->sample_aspect_ratio);
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);
*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;
}
static av_cold int av1_init(AVCodecContext *avctx)
{
return aom_init(avctx, &aom_codec_av1_dx_algo);
}
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 = av1_init,
.close = aom_free,
.decode = aom_decode,
.capabilities = AV_CODEC_CAP_AUTO_THREADS | AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_AUTO_THREADS,
.profiles = NULL_IF_CONFIG_SMALL(ff_av1_profiles),
.wrapper_name = "libaom",
};
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