370 lines
12 KiB
C
370 lines
12 KiB
C
|
/*
|
||
|
|
* 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/pixdesc.h"
|
||
|
|
|
||
|
|
#include "avcodec.h"
|
||
|
|
#include "idctdsp.h"
|
||
|
|
#include "internal.h"
|
||
|
|
#include "jpegtables.h"
|
||
|
|
#include "mjpegenc_common.h"
|
||
|
|
#include "mjpeg.h"
|
||
|
|
|
||
|
|
typedef struct LJpegEncContext {
|
||
|
|
AVClass *class;
|
||
|
|
IDCTDSPContext idsp;
|
||
|
|
ScanTable scantable;
|
||
|
|
uint16_t matrix[64];
|
||
|
|
|
||
|
|
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;
|
||
|
|
|
||
|
|
#if FF_API_PRIVATE_OPT
|
||
|
|
FF_DISABLE_DEPRECATION_WARNINGS
|
||
|
|
if (avctx->prediction_method)
|
||
|
|
s->pred = avctx->prediction_method + 1;
|
||
|
|
FF_ENABLE_DEPRECATION_WARNINGS
|
||
|
|
#endif
|
||
|
|
|
||
|
|
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;
|
||
|
|
uint8_t *ptr = frame->data[0] + (linesize * y);
|
||
|
|
|
||
|
|
if (pb->buf_end - pb->buf - (put_bits_count(pb) >> 3) < 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++) {
|
||
|
|
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++) {
|
||
|
|
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;
|
||
|
|
|
||
|
|
#if FF_API_PRIVATE_OPT
|
||
|
|
FF_DISABLE_DEPRECATION_WARNINGS
|
||
|
|
if (avctx->prediction_method)
|
||
|
|
s->pred = avctx->prediction_method + 1;
|
||
|
|
FF_ENABLE_DEPRECATION_WARNINGS
|
||
|
|
#endif
|
||
|
|
|
||
|
|
for (mb_y = 0; mb_y < mb_height; mb_y++) {
|
||
|
|
if (pb->buf_end - pb->buf - (put_bits_count(pb) >> 3) <
|
||
|
|
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];
|
||
|
|
int max_pkt_size = AV_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_alloc_packet2(avctx, pkt, max_pkt_size, 0)) < 0)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
init_put_bits(&pb, pkt->data, pkt->size);
|
||
|
|
|
||
|
|
ff_mjpeg_encode_picture_header(avctx, &pb, &s->scantable,
|
||
|
|
s->pred, s->matrix, s->matrix);
|
||
|
|
|
||
|
|
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;
|
||
|
|
|
||
|
|
emms_c();
|
||
|
|
|
||
|
|
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;
|
||
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
||
|
|
*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)
|
||
|
|
{
|
||
|
|
LJpegEncContext *s = avctx->priv_data;
|
||
|
|
|
||
|
|
if ((avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
|
||
|
|
avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
|
||
|
|
avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
|
||
|
|
avctx->color_range == AVCOL_RANGE_MPEG) &&
|
||
|
|
avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
|
||
|
|
av_log(avctx, AV_LOG_ERROR,
|
||
|
|
"Limited range YUV is non-standard, set strict_std_compliance to "
|
||
|
|
"at least unofficial to use it.\n");
|
||
|
|
return AVERROR(EINVAL);
|
||
|
|
}
|
||
|
|
|
||
|
|
#if FF_API_CODED_FRAME
|
||
|
|
FF_DISABLE_DEPRECATION_WARNINGS
|
||
|
|
avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
|
||
|
|
avctx->coded_frame->key_frame = 1;
|
||
|
|
FF_ENABLE_DEPRECATION_WARNINGS
|
||
|
|
#endif
|
||
|
|
|
||
|
|
s->scratch = av_malloc_array(avctx->width + 1, sizeof(*s->scratch));
|
||
|
|
if (!s->scratch)
|
||
|
|
goto fail;
|
||
|
|
|
||
|
|
ff_idctdsp_init(&s->idsp, avctx);
|
||
|
|
ff_init_scantable(s->idsp.idct_permutation, &s->scantable,
|
||
|
|
ff_zigzag_direct);
|
||
|
|
|
||
|
|
ff_mjpeg_init_hvsample(avctx, s->hsample, s->vsample);
|
||
|
|
|
||
|
|
ff_mjpeg_build_huffman_codes(s->huff_size_dc_luminance,
|
||
|
|
s->huff_code_dc_luminance,
|
||
|
|
avpriv_mjpeg_bits_dc_luminance,
|
||
|
|
avpriv_mjpeg_val_dc);
|
||
|
|
ff_mjpeg_build_huffman_codes(s->huff_size_dc_chrominance,
|
||
|
|
s->huff_code_dc_chrominance,
|
||
|
|
avpriv_mjpeg_bits_dc_chrominance,
|
||
|
|
avpriv_mjpeg_val_dc);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
fail:
|
||
|
|
ljpeg_encode_close(avctx);
|
||
|
|
return AVERROR(ENOMEM);
|
||
|
|
}
|
||
|
|
|
||
|
|
#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, "pred" },
|
||
|
|
{ "left", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, "pred" },
|
||
|
|
{ "plane", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, INT_MIN, INT_MAX, VE, "pred" },
|
||
|
|
{ "median", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 3 }, INT_MIN, INT_MAX, VE, "pred" },
|
||
|
|
|
||
|
|
{ NULL},
|
||
|
|
};
|
||
|
|
|
||
|
|
static const AVClass ljpeg_class = {
|
||
|
|
.class_name = "ljpeg",
|
||
|
|
.item_name = av_default_item_name,
|
||
|
|
.option = options,
|
||
|
|
.version = LIBAVUTIL_VERSION_INT,
|
||
|
|
};
|
||
|
|
|
||
|
|
AVCodec ff_ljpeg_encoder = {
|
||
|
|
.name = "ljpeg",
|
||
|
|
.long_name = NULL_IF_CONFIG_SMALL("Lossless JPEG"),
|
||
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
||
|
|
.id = AV_CODEC_ID_LJPEG,
|
||
|
|
.priv_data_size = sizeof(LJpegEncContext),
|
||
|
|
.priv_class = &ljpeg_class,
|
||
|
|
.init = ljpeg_encode_init,
|
||
|
|
.encode2 = ljpeg_encode_frame,
|
||
|
|
.close = ljpeg_encode_close,
|
||
|
|
.capabilities = AV_CODEC_CAP_FRAME_THREADS,
|
||
|
|
.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},
|
||
|
|
};
|