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/*
* Dolby Vision RPU encoder
*
* Copyright (C) 2024 Niklas Haas
*
* 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 "libavutil/mem.h"
#include "avcodec.h"
#include "dovi_rpu.h"
static struct {
uint64_t pps; // maximum pixels per second
int width; // maximum width
int main; // maximum bitrate in main tier
int high; // maximum bitrate in high tier
} dv_levels[] = {
[1] = {1280*720*24, 1280, 20, 50},
[2] = {1280*720*30, 1280, 20, 50},
[3] = {1920*1080*24, 1920, 20, 70},
[4] = {1920*1080*30, 2560, 20, 70},
[5] = {1920*1080*60, 3840, 20, 70},
[6] = {3840*2160*24, 3840, 25, 130},
[7] = {3840*2160*30, 3840, 25, 130},
[8] = {3840*2160*48, 3840, 40, 130},
[9] = {3840*2160*60, 3840, 40, 130},
[10] = {3840*2160*120, 3840, 60, 240},
[11] = {3840*2160*120, 7680, 60, 240},
[12] = {7680*4320*60, 7680, 120, 450},
[13] = {7680*4320*120u, 7680, 240, 800},
};
int ff_dovi_configure(DOVIContext *s, AVCodecContext *avctx)
{
AVDOVIDecoderConfigurationRecord *cfg;
const AVDOVIRpuDataHeader *hdr = NULL;
const AVFrameSideData *sd;
int dv_profile, dv_level, bl_compat_id;
size_t cfg_size;
uint64_t pps;
if (!s->enable)
goto skip;
sd = av_frame_side_data_get(avctx->decoded_side_data,
avctx->nb_decoded_side_data, AV_FRAME_DATA_DOVI_METADATA);
if (sd)
hdr = av_dovi_get_header((const AVDOVIMetadata *) sd->data);
if (s->enable == FF_DOVI_AUTOMATIC && !hdr)
goto skip;
switch (avctx->codec_id) {
case AV_CODEC_ID_AV1: dv_profile = 10; break;
case AV_CODEC_ID_H264: dv_profile = 9; break;
case AV_CODEC_ID_HEVC: dv_profile = hdr ? ff_dovi_guess_profile_hevc(hdr) : 8; break;
default:
/* No other encoder should be calling this! */
av_assert0(0);
return AVERROR_BUG;
}
if (avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
if (dv_profile == 9) {
if (avctx->pix_fmt != AV_PIX_FMT_YUV420P)
dv_profile = 0;
} else {
if (avctx->pix_fmt != AV_PIX_FMT_YUV420P10)
dv_profile = 0;
}
}
switch (dv_profile) {
case 0: /* None */
bl_compat_id = -1;
break;
case 4: /* HEVC with enhancement layer */
case 7:
if (s->enable > 0) {
av_log(s->logctx, AV_LOG_ERROR, "Coding of Dolby Vision enhancement "
"layers is currently unsupported.");
return AVERROR_PATCHWELCOME;
} else {
goto skip;
}
case 5: /* HEVC with proprietary IPTPQc2 */
bl_compat_id = 0;
break;
case 10:
/* FIXME: check for proper H.273 tags once those are added */
if (hdr && hdr->bl_video_full_range_flag) {
/* AV1 with proprietary IPTPQc2 */
bl_compat_id = 0;
break;
}
/* fall through */
case 8: /* HEVC (or AV1) with BL compatibility */
if (avctx->colorspace == AVCOL_SPC_BT2020_NCL &&
avctx->color_primaries == AVCOL_PRI_BT2020 &&
avctx->color_trc == AVCOL_TRC_SMPTE2084) {
bl_compat_id = 1;
} else if (avctx->colorspace == AVCOL_SPC_BT2020_NCL &&
avctx->color_primaries == AVCOL_PRI_BT2020 &&
avctx->color_trc == AVCOL_TRC_ARIB_STD_B67) {
bl_compat_id = 4;
} else if (avctx->colorspace == AVCOL_SPC_BT709 &&
avctx->color_primaries == AVCOL_PRI_BT709 &&
avctx->color_trc == AVCOL_TRC_BT709) {
bl_compat_id = 2;
} else {
/* Not a valid colorspace combination */
bl_compat_id = -1;
}
}
if (!dv_profile || bl_compat_id < 0) {
if (s->enable > 0) {
av_log(s->logctx, AV_LOG_ERROR, "Dolby Vision enabled, but could "
"not determine profile and compaatibility mode. Double-check "
"colorspace and format settings for compatibility?\n");
return AVERROR(EINVAL);
}
goto skip;
}
pps = avctx->width * avctx->height;
if (avctx->framerate.num) {
pps = pps * avctx->framerate.num / avctx->framerate.den;
} else {
pps *= 25; /* sanity fallback */
}
dv_level = 0;
for (int i = 1; i < FF_ARRAY_ELEMS(dv_levels); i++) {
if (pps > dv_levels[i].pps)
continue;
if (avctx->width > dv_levels[i].width)
continue;
/* In theory, we should also test the bitrate when known, and
* distinguish between main and high tier. In practice, just ignore
* the bitrate constraints and hope they work out. This would ideally
* be handled by either the encoder or muxer directly. */
dv_level = i;
break;
}
if (!dv_level) {
if (avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT) {
av_log(s->logctx, AV_LOG_ERROR, "Coded PPS (%"PRIu64") and width (%d) "
"exceed Dolby Vision limitations\n", pps, avctx->width);
return AVERROR(EINVAL);
} else {
av_log(s->logctx, AV_LOG_WARNING, "Coded PPS (%"PRIu64") and width (%d) "
"exceed Dolby Vision limitations. Ignoring, resulting file "
"may be non-conforming.\n", pps, avctx->width);
dv_level = FF_ARRAY_ELEMS(dv_levels) - 1;
}
}
cfg = av_dovi_alloc(&cfg_size);
if (!cfg)
return AVERROR(ENOMEM);
if (!av_packet_side_data_add(&avctx->coded_side_data, &avctx->nb_coded_side_data,
AV_PKT_DATA_DOVI_CONF, cfg, cfg_size, 0)) {
av_free(cfg);
return AVERROR(ENOMEM);
}
cfg->dv_version_major = 1;
cfg->dv_version_minor = 0;
cfg->dv_profile = dv_profile;
cfg->dv_level = dv_level;
cfg->rpu_present_flag = 1;
cfg->el_present_flag = 0;
cfg->bl_present_flag = 1;
cfg->dv_bl_signal_compatibility_id = bl_compat_id;
s->cfg = *cfg;
return 0;
skip:
s->cfg = (AVDOVIDecoderConfigurationRecord) {0};
return 0;
}
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