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/* |
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* lossless JPEG encoder |
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* Copyright (c) 2000, 2001 Fabrice Bellard |
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* Copyright (c) 2003 Alex Beregszaszi |
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* Copyright (c) 2003-2004 Michael Niedermayer |
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* |
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* Support for external huffman table, various fixes (AVID workaround), |
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* aspecting, new decode_frame mechanism and apple mjpeg-b support |
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* by Alex Beregszaszi |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* @file |
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* lossless JPEG encoder. |
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*/ |
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#include "libavutil/frame.h" |
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#include "libavutil/mem.h" |
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#include "libavutil/opt.h" |
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#include "libavutil/pixdesc.h" |
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#include "avcodec.h" |
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#include "idctdsp.h" |
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#include "internal.h" |
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#include "jpegtables.h" |
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#include "mathops.h" |
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#include "mjpegenc_common.h" |
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#include "mjpeg.h" |
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typedef struct LJpegEncContext { |
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AVClass *class; |
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IDCTDSPContext idsp; |
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ScanTable scantable; |
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uint16_t matrix[64]; |
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int vsample[4]; |
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int hsample[4]; |
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uint16_t huff_code_dc_luminance[12]; |
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uint16_t huff_code_dc_chrominance[12]; |
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uint8_t huff_size_dc_luminance[12]; |
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uint8_t huff_size_dc_chrominance[12]; |
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uint16_t (*scratch)[4]; |
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int pred; |
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} LJpegEncContext; |
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static int ljpeg_encode_bgr(AVCodecContext *avctx, PutBitContext *pb, |
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const AVFrame *frame) |
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{ |
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LJpegEncContext *s = avctx->priv_data; |
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const int width = frame->width; |
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const int height = frame->height; |
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const int linesize = frame->linesize[0]; |
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uint16_t (*buffer)[4] = s->scratch; |
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int left[4], top[4], topleft[4]; |
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int x, y, i; |
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#if FF_API_PRIVATE_OPT |
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FF_DISABLE_DEPRECATION_WARNINGS |
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if (avctx->prediction_method) |
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s->pred = avctx->prediction_method + 1; |
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FF_ENABLE_DEPRECATION_WARNINGS |
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#endif |
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for (i = 0; i < 4; i++) |
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buffer[0][i] = 1 << (9 - 1); |
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for (y = 0; y < height; y++) { |
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const int modified_predictor = y ? s->pred : 1; |
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uint8_t *ptr = frame->data[0] + (linesize * y); |
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if (put_bytes_left(pb, 0) < width * 4 * 4) { |
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av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n"); |
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return -1; |
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} |
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for (i = 0; i < 4; i++) |
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top[i]= left[i]= topleft[i]= buffer[0][i]; |
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for (x = 0; x < width; x++) { |
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if(avctx->pix_fmt == AV_PIX_FMT_BGR24){ |
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buffer[x][1] = ptr[3 * x + 0] - ptr[3 * x + 1] + 0x100; |
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buffer[x][2] = ptr[3 * x + 2] - ptr[3 * x + 1] + 0x100; |
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buffer[x][0] = (ptr[3 * x + 0] + 2 * ptr[3 * x + 1] + ptr[3 * x + 2]) >> 2; |
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}else{ |
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buffer[x][1] = ptr[4 * x + 0] - ptr[4 * x + 1] + 0x100; |
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buffer[x][2] = ptr[4 * x + 2] - ptr[4 * x + 1] + 0x100; |
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buffer[x][0] = (ptr[4 * x + 0] + 2 * ptr[4 * x + 1] + ptr[4 * x + 2]) >> 2; |
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if (avctx->pix_fmt == AV_PIX_FMT_BGRA) |
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buffer[x][3] = ptr[4 * x + 3]; |
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} |
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for (i = 0; i < 3 + (avctx->pix_fmt == AV_PIX_FMT_BGRA); i++) { |
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int pred, diff; |
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PREDICT(pred, topleft[i], top[i], left[i], modified_predictor); |
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topleft[i] = top[i]; |
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top[i] = buffer[x+1][i]; |
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left[i] = buffer[x][i]; |
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diff = ((left[i] - pred + 0x100) & 0x1FF) - 0x100; |
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if (i == 0 || i == 3) |
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ff_mjpeg_encode_dc(pb, diff, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly |
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else |
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ff_mjpeg_encode_dc(pb, diff, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance); |
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} |
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} |
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} |
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return 0; |
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} |
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3816050 |
static inline void ljpeg_encode_yuv_mb(LJpegEncContext *s, PutBitContext *pb, |
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const AVFrame *frame, int predictor, |
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int mb_x, int mb_y) |
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{ |
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int i; |
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✓✓✓✓
|
3816050 |
if (mb_x == 0 || mb_y == 0) { |
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✓✓ |
198000 |
for (i = 0; i < 3; i++) { |
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uint8_t *ptr; |
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int x, y, h, v, linesize; |
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148500 |
h = s->hsample[i]; |
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148500 |
v = s->vsample[i]; |
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148500 |
linesize = frame->linesize[i]; |
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✓✓ |
346500 |
for (y = 0; y < v; y++) { |
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✓✓ |
495000 |
for (x = 0; x < h; x++) { |
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int pred; |
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ptr = frame->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap |
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✓✓✓✓
|
297000 |
if (y == 0 && mb_y == 0) { |
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✓✓✓✓
|
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if (x == 0 && mb_x == 0) |
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pred = 128; |
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else |
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108400 |
pred = ptr[-1]; |
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} else { |
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✓✓✓✓
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if (x == 0 && mb_x == 0) { |
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89200 |
pred = ptr[-linesize]; |
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} else { |
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✗✓✗✗
✗✗✗✗
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PREDICT(pred, ptr[-linesize - 1], ptr[-linesize], |
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ptr[-1], predictor); |
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} |
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} |
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✓✓ |
297000 |
if (i == 0) |
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198000 |
ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly |
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else |
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ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance); |
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} |
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} |
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} |
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} else { |
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✓✓ |
15066200 |
for (i = 0; i < 3; i++) { |
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uint8_t *ptr; |
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int x, y, h, v, linesize; |
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11299650 |
h = s->hsample[i]; |
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11299650 |
v = s->vsample[i]; |
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11299650 |
linesize = frame->linesize[i]; |
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✓✓ |
26365850 |
for (y = 0; y < v; y++) { |
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✓✓ |
37665500 |
for (x = 0; x < h; x++) { |
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int pred; |
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ptr = frame->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap |
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✗✓✗✗
✗✗✗✗
|
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PREDICT(pred, ptr[-linesize - 1], ptr[-linesize], ptr[-1], predictor); |
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✓✓ |
22599300 |
if (i == 0) |
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15066200 |
ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly |
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else |
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ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance); |
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} |
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} |
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} |
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} |
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3816050 |
} |
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static int ljpeg_encode_yuv(AVCodecContext *avctx, PutBitContext *pb, |
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const AVFrame *frame) |
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{ |
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LJpegEncContext *s = avctx->priv_data; |
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const int mb_width = (avctx->width + s->hsample[0] - 1) / s->hsample[0]; |
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const int mb_height = (avctx->height + s->vsample[0] - 1) / s->vsample[0]; |
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int mb_x, mb_y; |
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#if FF_API_PRIVATE_OPT |
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FF_DISABLE_DEPRECATION_WARNINGS |
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✗✓ |
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if (avctx->prediction_method) |
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s->pred = avctx->prediction_method + 1; |
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FF_ENABLE_DEPRECATION_WARNINGS |
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#endif |
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✓✓ |
22650 |
for (mb_y = 0; mb_y < mb_height; mb_y++) { |
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22450 |
if (put_bytes_left(pb, 0) < |
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✗✓ |
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mb_width * 4 * 3 * s->hsample[0] * s->vsample[0]) { |
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av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n"); |
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return -1; |
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} |
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✓✓ |
3838500 |
for (mb_x = 0; mb_x < mb_width; mb_x++) |
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3816050 |
ljpeg_encode_yuv_mb(s, pb, frame, s->pred, mb_x, mb_y); |
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} |
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return 0; |
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} |
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static int ljpeg_encode_frame(AVCodecContext *avctx, AVPacket *pkt, |
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const AVFrame *pict, int *got_packet) |
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{ |
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LJpegEncContext *s = avctx->priv_data; |
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PutBitContext pb; |
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const int width = avctx->width; |
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const int height = avctx->height; |
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const int mb_width = (width + s->hsample[0] - 1) / s->hsample[0]; |
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const int mb_height = (height + s->vsample[0] - 1) / s->vsample[0]; |
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int max_pkt_size = AV_INPUT_BUFFER_MIN_SIZE; |
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int ret, header_bits; |
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✓✗ |
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if( avctx->pix_fmt == AV_PIX_FMT_BGR0 |
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✗✓ |
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|| avctx->pix_fmt == AV_PIX_FMT_BGR24) |
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max_pkt_size += width * height * 3 * 4; |
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✗✓ |
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else if(avctx->pix_fmt == AV_PIX_FMT_BGRA) |
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max_pkt_size += width * height * 4 * 4; |
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else { |
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max_pkt_size += mb_width * mb_height * 3 * 4 |
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* s->hsample[0] * s->vsample[0]; |
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} |
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✗✓ |
200 |
if ((ret = ff_alloc_packet2(avctx, pkt, max_pkt_size, 0)) < 0) |
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return ret; |
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init_put_bits(&pb, pkt->data, pkt->size); |
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ff_mjpeg_encode_picture_header(avctx, &pb, &s->scantable, |
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s->pred, s->matrix, s->matrix); |
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|
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header_bits = put_bits_count(&pb); |
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✓✗ |
200 |
if( avctx->pix_fmt == AV_PIX_FMT_BGR0 |
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✓✗ |
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|| avctx->pix_fmt == AV_PIX_FMT_BGRA |
261 |
✗✓ |
200 |
|| avctx->pix_fmt == AV_PIX_FMT_BGR24) |
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ret = ljpeg_encode_bgr(avctx, &pb, pict); |
263 |
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else |
264 |
|
200 |
ret = ljpeg_encode_yuv(avctx, &pb, pict); |
265 |
✗✓ |
200 |
if (ret < 0) |
266 |
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return ret; |
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emms_c(); |
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200 |
ff_mjpeg_escape_FF(&pb, header_bits >> 3); |
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200 |
ff_mjpeg_encode_picture_trailer(&pb, header_bits); |
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flush_put_bits(&pb); |
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pkt->size = put_bits_ptr(&pb) - pb.buf; |
275 |
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200 |
pkt->flags |= AV_PKT_FLAG_KEY; |
276 |
|
200 |
*got_packet = 1; |
277 |
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278 |
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200 |
return 0; |
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} |
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281 |
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4 |
static av_cold int ljpeg_encode_close(AVCodecContext *avctx) |
282 |
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{ |
283 |
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4 |
LJpegEncContext *s = avctx->priv_data; |
284 |
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285 |
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4 |
av_freep(&s->scratch); |
286 |
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287 |
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4 |
return 0; |
288 |
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} |
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290 |
|
4 |
static av_cold int ljpeg_encode_init(AVCodecContext *avctx) |
291 |
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{ |
292 |
|
4 |
int ret = ff_mjpeg_encode_check_pix_fmt(avctx); |
293 |
|
4 |
LJpegEncContext *s = avctx->priv_data; |
294 |
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295 |
✗✓ |
4 |
if (ret < 0) |
296 |
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return ret; |
297 |
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#if FF_API_CODED_FRAME |
299 |
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FF_DISABLE_DEPRECATION_WARNINGS |
300 |
|
4 |
avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I; |
301 |
|
4 |
avctx->coded_frame->key_frame = 1; |
302 |
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FF_ENABLE_DEPRECATION_WARNINGS |
303 |
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#endif |
304 |
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|
305 |
|
4 |
s->scratch = av_malloc_array(avctx->width + 1, sizeof(*s->scratch)); |
306 |
✗✓ |
4 |
if (!s->scratch) |
307 |
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return AVERROR(ENOMEM); |
308 |
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|
309 |
|
4 |
ff_idctdsp_init(&s->idsp, avctx); |
310 |
|
4 |
ff_init_scantable(s->idsp.idct_permutation, &s->scantable, |
311 |
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ff_zigzag_direct); |
312 |
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313 |
|
4 |
ff_mjpeg_init_hvsample(avctx, s->hsample, s->vsample); |
314 |
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|
315 |
|
4 |
ff_mjpeg_build_huffman_codes(s->huff_size_dc_luminance, |
316 |
|
4 |
s->huff_code_dc_luminance, |
317 |
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avpriv_mjpeg_bits_dc_luminance, |
318 |
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avpriv_mjpeg_val_dc); |
319 |
|
4 |
ff_mjpeg_build_huffman_codes(s->huff_size_dc_chrominance, |
320 |
|
4 |
s->huff_code_dc_chrominance, |
321 |
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avpriv_mjpeg_bits_dc_chrominance, |
322 |
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avpriv_mjpeg_val_dc); |
323 |
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324 |
|
4 |
return 0; |
325 |
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} |
326 |
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327 |
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#define OFFSET(x) offsetof(LJpegEncContext, x) |
328 |
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#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM |
329 |
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static const AVOption options[] = { |
330 |
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{ "pred", "Prediction method", OFFSET(pred), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, 3, VE, "pred" }, |
331 |
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{ "left", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, "pred" }, |
332 |
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{ "plane", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, INT_MIN, INT_MAX, VE, "pred" }, |
333 |
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{ "median", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 3 }, INT_MIN, INT_MAX, VE, "pred" }, |
334 |
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335 |
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{ NULL}, |
336 |
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}; |
337 |
|
|
|
338 |
|
|
static const AVClass ljpeg_class = { |
339 |
|
|
.class_name = "ljpeg", |
340 |
|
|
.item_name = av_default_item_name, |
341 |
|
|
.option = options, |
342 |
|
|
.version = LIBAVUTIL_VERSION_INT, |
343 |
|
|
}; |
344 |
|
|
|
345 |
|
|
AVCodec ff_ljpeg_encoder = { |
346 |
|
|
.name = "ljpeg", |
347 |
|
|
.long_name = NULL_IF_CONFIG_SMALL("Lossless JPEG"), |
348 |
|
|
.type = AVMEDIA_TYPE_VIDEO, |
349 |
|
|
.id = AV_CODEC_ID_LJPEG, |
350 |
|
|
.priv_data_size = sizeof(LJpegEncContext), |
351 |
|
|
.priv_class = &ljpeg_class, |
352 |
|
|
.init = ljpeg_encode_init, |
353 |
|
|
.encode2 = ljpeg_encode_frame, |
354 |
|
|
.close = ljpeg_encode_close, |
355 |
|
|
.capabilities = AV_CODEC_CAP_FRAME_THREADS, |
356 |
|
|
.pix_fmts = (const enum AVPixelFormat[]){ |
357 |
|
|
AV_PIX_FMT_BGR24 , AV_PIX_FMT_BGRA , AV_PIX_FMT_BGR0, |
358 |
|
|
AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, |
359 |
|
|
AV_PIX_FMT_YUV420P , AV_PIX_FMT_YUV444P , AV_PIX_FMT_YUV422P, |
360 |
|
|
AV_PIX_FMT_NONE}, |
361 |
|
|
}; |