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ffmpeg/libavcodec/ljpegenc.c
Andreas Rheinhardt 1d66a122df avcodec/avcodec: Deprecate AV_INPUT_BUFFER_MIN_SIZE 
It used to be used with preallocated packet buffers with
the old encode API, but said API is no more and therefore
there is no reason for this to be public any more.
So deprecate it and use an internal replacement
for the encoders using it as an upper bound for the
size of their headers.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-02-21 00:24:44 +01:00

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/*
* lossless JPEG encoder
* Copyright (c) 2000, 2001 Fabrice Bellard
* Copyright (c) 2003 Alex Beregszaszi
* Copyright (c) 2003-2004 Michael Niedermayer
*
* Support for external huffman table, various fixes (AVID workaround),
* aspecting, new decode_frame mechanism and apple mjpeg-b support
* by 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
* lossless JPEG encoder.
*/
#include "libavutil/frame.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "encode.h"
#include "jpegtables.h"
#include "mjpegenc_common.h"
#include "mjpeg.h"
typedef struct LJpegEncContext {
AVClass *class;
int vsample[4];
int hsample[4];
uint16_t huff_code_dc_luminance[12];
uint16_t huff_code_dc_chrominance[12];
uint8_t huff_size_dc_luminance[12];
uint8_t huff_size_dc_chrominance[12];
uint16_t (*scratch)[4];
int pred;
} LJpegEncContext;
static int ljpeg_encode_bgr(AVCodecContext *avctx, PutBitContext *pb,
const AVFrame *frame)
{
LJpegEncContext *s = avctx->priv_data;
const int width = frame->width;
const int height = frame->height;
const int linesize = frame->linesize[0];
uint16_t (*buffer)[4] = s->scratch;
int left[4], top[4], topleft[4];
int x, y, i;
for (i = 0; i < 4; i++)
buffer[0][i] = 1 << (9 - 1);
for (y = 0; y < height; y++) {
const int modified_predictor = y ? s->pred : 1;
const uint8_t *ptr = frame->data[0] + (linesize * y);
if (put_bytes_left(pb, 0) < width * 4 * 4) {
av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
return -1;
}
for (i = 0; i < 4; i++)
top[i]= left[i]= topleft[i]= buffer[0][i];
for (x = 0; x < width; x++) {
if(avctx->pix_fmt == AV_PIX_FMT_BGR24){
buffer[x][1] = ptr[3 * x + 0] - ptr[3 * x + 1] + 0x100;
buffer[x][2] = ptr[3 * x + 2] - ptr[3 * x + 1] + 0x100;
buffer[x][0] = (ptr[3 * x + 0] + 2 * ptr[3 * x + 1] + ptr[3 * x + 2]) >> 2;
}else{
buffer[x][1] = ptr[4 * x + 0] - ptr[4 * x + 1] + 0x100;
buffer[x][2] = ptr[4 * x + 2] - ptr[4 * x + 1] + 0x100;
buffer[x][0] = (ptr[4 * x + 0] + 2 * ptr[4 * x + 1] + ptr[4 * x + 2]) >> 2;
if (avctx->pix_fmt == AV_PIX_FMT_BGRA)
buffer[x][3] = ptr[4 * x + 3];
}
for (i = 0; i < 3 + (avctx->pix_fmt == AV_PIX_FMT_BGRA); i++) {
int pred, diff;
PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
topleft[i] = top[i];
top[i] = buffer[x+1][i];
left[i] = buffer[x][i];
diff = ((left[i] - pred + 0x100) & 0x1FF) - 0x100;
if (i == 0 || i == 3)
ff_mjpeg_encode_dc(pb, diff, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
else
ff_mjpeg_encode_dc(pb, diff, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
}
}
}
return 0;
}
static inline void ljpeg_encode_yuv_mb(LJpegEncContext *s, PutBitContext *pb,
const AVFrame *frame, int predictor,
int mb_x, int mb_y)
{
int i;
if (mb_x == 0 || mb_y == 0) {
for (i = 0; i < 3; i++) {
const uint8_t *ptr;
int x, y, h, v, linesize;
h = s->hsample[i];
v = s->vsample[i];
linesize = frame->linesize[i];
for (y = 0; y < v; y++) {
for (x = 0; x < h; x++) {
int pred;
ptr = frame->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
if (y == 0 && mb_y == 0) {
if (x == 0 && mb_x == 0)
pred = 128;
else
pred = ptr[-1];
} else {
if (x == 0 && mb_x == 0) {
pred = ptr[-linesize];
} else {
PREDICT(pred, ptr[-linesize - 1], ptr[-linesize],
ptr[-1], predictor);
}
}
if (i == 0)
ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
else
ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
}
}
}
} else {
for (i = 0; i < 3; i++) {
const uint8_t *ptr;
int x, y, h, v, linesize;
h = s->hsample[i];
v = s->vsample[i];
linesize = frame->linesize[i];
for (y = 0; y < v; y++) {
for (x = 0; x < h; x++) {
int pred;
ptr = frame->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
PREDICT(pred, ptr[-linesize - 1], ptr[-linesize], ptr[-1], predictor);
if (i == 0)
ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
else
ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
}
}
}
}
}
static int ljpeg_encode_yuv(AVCodecContext *avctx, PutBitContext *pb,
const AVFrame *frame)
{
LJpegEncContext *s = avctx->priv_data;
const int mb_width = (avctx->width + s->hsample[0] - 1) / s->hsample[0];
const int mb_height = (avctx->height + s->vsample[0] - 1) / s->vsample[0];
int mb_x, mb_y;
for (mb_y = 0; mb_y < mb_height; mb_y++) {
if (put_bytes_left(pb, 0) <
mb_width * 4 * 3 * s->hsample[0] * s->vsample[0]) {
av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
return -1;
}
for (mb_x = 0; mb_x < mb_width; mb_x++)
ljpeg_encode_yuv_mb(s, pb, frame, s->pred, mb_x, mb_y);
}
return 0;
}
static int ljpeg_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *pict, int *got_packet)
{
LJpegEncContext *s = avctx->priv_data;
PutBitContext pb;
const int width = avctx->width;
const int height = avctx->height;
const int mb_width = (width + s->hsample[0] - 1) / s->hsample[0];
const int mb_height = (height + s->vsample[0] - 1) / s->vsample[0];
size_t max_pkt_size = FF_INPUT_BUFFER_MIN_SIZE;
int ret, header_bits;
if( avctx->pix_fmt == AV_PIX_FMT_BGR0
|| avctx->pix_fmt == AV_PIX_FMT_BGR24)
max_pkt_size += width * height * 3 * 4;
else if(avctx->pix_fmt == AV_PIX_FMT_BGRA)
max_pkt_size += width * height * 4 * 4;
else {
max_pkt_size += mb_width * mb_height * 3 * 4
* s->hsample[0] * s->vsample[0];
}
if ((ret = ff_mjpeg_add_icc_profile_size(avctx, pict, &max_pkt_size)) < 0)
return ret;
if ((ret = ff_alloc_packet(avctx, pkt, max_pkt_size)) < 0)
return ret;
init_put_bits(&pb, pkt->data, pkt->size);
ff_mjpeg_encode_picture_header(avctx, &pb, pict, NULL, NULL,
s->pred, NULL, NULL, 0);
header_bits = put_bits_count(&pb);
if( avctx->pix_fmt == AV_PIX_FMT_BGR0
|| avctx->pix_fmt == AV_PIX_FMT_BGRA
|| avctx->pix_fmt == AV_PIX_FMT_BGR24)
ret = ljpeg_encode_bgr(avctx, &pb, pict);
else
ret = ljpeg_encode_yuv(avctx, &pb, pict);
if (ret < 0)
return ret;
ff_mjpeg_escape_FF(&pb, header_bits >> 3);
ff_mjpeg_encode_picture_trailer(&pb, header_bits);
flush_put_bits(&pb);
pkt->size = put_bits_ptr(&pb) - pb.buf;
*got_packet = 1;
return 0;
}
static av_cold int ljpeg_encode_close(AVCodecContext *avctx)
{
LJpegEncContext *s = avctx->priv_data;
av_freep(&s->scratch);
return 0;
}
static av_cold int ljpeg_encode_init(AVCodecContext *avctx)
{
int ret = ff_mjpeg_encode_check_pix_fmt(avctx);
LJpegEncContext *s = avctx->priv_data;
if (ret < 0)
return ret;
s->scratch = av_malloc_array(avctx->width + 1, sizeof(*s->scratch));
if (!s->scratch)
return AVERROR(ENOMEM);
ff_mjpeg_init_hvsample(avctx, s->hsample, s->vsample);
ff_mjpeg_build_huffman_codes(s->huff_size_dc_luminance,
s->huff_code_dc_luminance,
ff_mjpeg_bits_dc_luminance,
ff_mjpeg_val_dc);
ff_mjpeg_build_huffman_codes(s->huff_size_dc_chrominance,
s->huff_code_dc_chrominance,
ff_mjpeg_bits_dc_chrominance,
ff_mjpeg_val_dc);
return 0;
}
#define OFFSET(x) offsetof(LJpegEncContext, x)
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
{ "pred", "Prediction method", OFFSET(pred), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, 3, VE, .unit = "pred" },
{ "left", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, .unit = "pred" },
{ "plane", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, INT_MIN, INT_MAX, VE, .unit = "pred" },
{ "median", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 3 }, INT_MIN, INT_MAX, VE, .unit = "pred" },
{ NULL},
};
static const AVClass ljpeg_class = {
.class_name = "ljpeg",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
const FFCodec ff_ljpeg_encoder = {
.p.name = "ljpeg",
CODEC_LONG_NAME("Lossless JPEG"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_LJPEG,
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS |
AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
.priv_data_size = sizeof(LJpegEncContext),
.p.priv_class = &ljpeg_class,
.init = ljpeg_encode_init,
FF_CODEC_ENCODE_CB(ljpeg_encode_frame),
.close = ljpeg_encode_close,
.p.pix_fmts = (const enum AVPixelFormat[]){
AV_PIX_FMT_BGR24 , AV_PIX_FMT_BGRA , AV_PIX_FMT_BGR0,
AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
AV_PIX_FMT_YUV420P , AV_PIX_FMT_YUV444P , AV_PIX_FMT_YUV422P,
AV_PIX_FMT_NONE},
};
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