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mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-02 03:06:28 +02:00
FFmpeg/libavcodec/cljrenc.c
Niklas Haas 703288cec6 avcodec/internal: add FFCodec.color_ranges
I went through all codecs and put them into five basic categories:

1. JPEG range only
2. MPEG range only
3. Explicitly tagged
4. Broken (codec supports both but encoder ignores tags)
5. N/A (headerless or pseudo-formats)

Filters in category 5 remain untouched. The rest gain an explicit
assignment of their supported color ranges, with codecs in category
4 being set to MPEG-only for safety.

It might be considered redundant to distinguish between 0 (category 5)
and MPEG+JPEG (category 3), but in doing so we effectively communicate
that we can guarantee that these tags will be encoded, which is distinct
from the situation where there are some codecs that simply don't have
tagging or implied semantics (e.g. rawvideo).

A full list of codecs follows:

JPEG range only:
 - amv
 - roqvideo

MPEG range only:
 - asv1, asv2
 - avui
 - cfhd
 - cljr
 - dnxhd
 - dvvideo
 - ffv1
 - flv
 - h261, h263, h263p
 - {h263,vp8}_v4l2m2m
 - huffyuv, ffvhuff
 - jpeg2000
 - libopenjpeg
 - libtheora
 - libwebp, libwebp_anim
 - libx262
 - libxavs, libxavs2
 - libxvid
 - mpeg1video, mpeg2video
 - mpeg2_qsv
 - mpeg2_vaapi
 - mpeg4, msmpeg4, msmpeg4v2, wmv1, wmv2
 - mpeg4_omx
 - prores, prores_aw, prores_ks
 - rv10, rv20
 - snow
 - speedhq
 - svq1
 - tiff
 - utvideo

Explicitly tagged (MPEG/JPEG):
 - {av1,h264,hevc}_nvenc
 - {av1,h264,hevc}_vaapi
 - {av1,h264,hevc,vp8,vp9,mpeg4}_mediacodec
 - {av1,h264,hevc,vp9}_qsv
 - h264_amf
 - {h264,hevc,prores}_videotoolbox
 - libaom-av1
 - libkvazaar
 - libopenh264
 - librav1e
 - libsvtav1
 - libvpx, libvpx-vp9
 - libx264
 - libx265
 - ljpeg
 - mjpeg
 - vc2

Broken (encoder ignores tags):
 - {av1,hevc}_amf
 - {h264,hevc,mpeg4}_v4l2m2m
 - h264_omx
 - libxeve
 - magicyuv
 - {vp8,vp9,mjpeg}_vaapi

N/A:
 - ayuv, yuv4, y41p, v308, v210, v410, v408 (headerless)
 - pgmyuv (headerless)
 - rawvideo, bitpacked (headerless)
 - vnull, wrapped_avframe (pseudocodecs)
2024-09-08 13:58:11 +02:00

124 lines
4.2 KiB
C

/*
* Cirrus Logic AccuPak (CLJR) encoder
* Copyright (c) 2003 Alex Beregszaszi
*
* 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
* Cirrus Logic AccuPak encoder.
*/
#include "libavutil/opt.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "encode.h"
#include "put_bits.h"
typedef struct CLJRContext {
AVClass *avclass;
int dither_type;
} CLJRContext;
static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *p, int *got_packet)
{
CLJRContext *a = avctx->priv_data;
PutBitContext pb;
int x, y, ret;
uint32_t dither= avctx->frame_num;
static const uint32_t ordered_dither[2][2] =
{
{ 0x10400000, 0x104F0000 },
{ 0xCB2A0000, 0xCB250000 },
};
if (avctx->width%4 && avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
av_log(avctx, AV_LOG_ERROR,
"Widths which are not a multiple of 4 might fail with some decoders, "
"use vstrict=-1 / -strict -1 to use %d anyway.\n", avctx->width);
return AVERROR_EXPERIMENTAL;
}
ret = ff_get_encode_buffer(avctx, pkt, 4 * avctx->height * ((avctx->width + 3) / 4), 0);
if (ret < 0)
return ret;
init_put_bits(&pb, pkt->data, pkt->size);
for (y = 0; y < avctx->height; y++) {
const uint8_t *luma = &p->data[0][y * p->linesize[0]];
const uint8_t *cb = &p->data[1][y * p->linesize[1]];
const uint8_t *cr = &p->data[2][y * p->linesize[2]];
uint8_t luma_tmp[4];
for (x = 0; x < avctx->width; x += 4) {
switch (a->dither_type) {
case 0: dither = 0x492A0000; break;
case 1: dither = dither * 1664525 + 1013904223; break;
case 2: dither = ordered_dither[ y&1 ][ (x>>2)&1 ];break;
}
if (x+3 >= avctx->width) {
memset(luma_tmp, 0, sizeof(luma_tmp));
memcpy(luma_tmp, luma, avctx->width - x);
luma = luma_tmp;
}
put_bits(&pb, 5, (249*(luma[3] + (dither>>29) )) >> 11);
put_bits(&pb, 5, (249*(luma[2] + ((dither>>26)&7))) >> 11);
put_bits(&pb, 5, (249*(luma[1] + ((dither>>23)&7))) >> 11);
put_bits(&pb, 5, (249*(luma[0] + ((dither>>20)&7))) >> 11);
luma += 4;
put_bits(&pb, 6, (253*(*(cb++) + ((dither>>18)&3))) >> 10);
put_bits(&pb, 6, (253*(*(cr++) + ((dither>>16)&3))) >> 10);
}
}
flush_put_bits(&pb);
*got_packet = 1;
return 0;
}
#define OFFSET(x) offsetof(CLJRContext, x)
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
{ "dither_type", "Dither type", OFFSET(dither_type), AV_OPT_TYPE_INT, { .i64=1 }, 0, 2, VE},
{ NULL },
};
static const AVClass cljr_class = {
.class_name = "cljr encoder",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
const FFCodec ff_cljr_encoder = {
.p.name = "cljr",
CODEC_LONG_NAME("Cirrus Logic AccuPak"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_CLJR,
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
.priv_data_size = sizeof(CLJRContext),
FF_CODEC_ENCODE_CB(encode_frame),
.p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV411P,
AV_PIX_FMT_NONE },
.color_ranges = AVCOL_RANGE_MPEG,
.p.priv_class = &cljr_class,
};