/*
* lossless JPEG encoder
- * Copyright (c) 2000, 2001 Fabrice Bellard.
+ * Copyright (c) 2000, 2001 Fabrice Bellard
* Copyright (c) 2003 Alex Beregszaszi
* Copyright (c) 2003-2004 Michael Niedermayer
*
- * This file is part of FFmpeg.
+ * Support for external huffman table, various fixes (AVID workaround),
+ * aspecting, new decode_frame mechanism and apple mjpeg-b support
+ * by Alex Beregszaszi
*
- * FFmpeg is free software; you can redistribute it and/or
+ * This file is part of Libav.
+ *
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * Support for external huffman table, various fixes (AVID workaround),
- * aspecting, new decode_frame mechanism and apple mjpeg-b support
- * by Alex Beregszaszi
*/
/**
- * @file ljpegenc.c
+ * @file
* lossless JPEG encoder.
*/
#include "avcodec.h"
#include "dsputil.h"
+#include "internal.h"
#include "mpegvideo.h"
#include "mjpeg.h"
#include "mjpegenc.h"
-static int encode_picture_lossless(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
+static int encode_picture_lossless(AVCodecContext *avctx, AVPacket *pkt,
+ const AVFrame *pict, int *got_packet)
+{
MpegEncContext * const s = avctx->priv_data;
MJpegContext * const m = s->mjpeg_ctx;
- AVFrame *pict = data;
const int width= s->width;
const int height= s->height;
- AVFrame * const p= (AVFrame*)&s->current_picture;
+ AVFrame * const p = &s->current_picture.f;
const int predictor= avctx->prediction_method+1;
+ const int mb_width = (width + s->mjpeg_hsample[0] - 1) / s->mjpeg_hsample[0];
+ const int mb_height = (height + s->mjpeg_vsample[0] - 1) / s->mjpeg_vsample[0];
+ int ret, max_pkt_size = FF_MIN_BUFFER_SIZE;
+
+ if (avctx->pix_fmt == AV_PIX_FMT_BGRA)
+ max_pkt_size += width * height * 3 * 4;
+ else {
+ max_pkt_size += mb_width * mb_height * 3 * 4
+ * s->mjpeg_hsample[0] * s->mjpeg_vsample[0];
+ }
+ if ((ret = ff_alloc_packet(pkt, max_pkt_size)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "Error getting output packet of size %d.\n", max_pkt_size);
+ return ret;
+ }
- init_put_bits(&s->pb, buf, buf_size);
+ init_put_bits(&s->pb, pkt->data, pkt->size);
*p = *pict;
- p->pict_type= FF_I_TYPE;
+ p->pict_type= AV_PICTURE_TYPE_I;
p->key_frame= 1;
- mjpeg_picture_header(s);
+ ff_mjpeg_encode_picture_header(s);
s->header_bits= put_bits_count(&s->pb);
- if(avctx->pix_fmt == PIX_FMT_RGB32){
+ if(avctx->pix_fmt == AV_PIX_FMT_BGRA){
int x, y, i;
const int linesize= p->linesize[0];
uint16_t (*buffer)[4]= (void *) s->rd_scratchpad;
diff= ((left[i] - pred + 0x100)&0x1FF) - 0x100;
if(i==0)
- mjpeg_encode_dc(s, diff, m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
+ ff_mjpeg_encode_dc(s, diff, m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
else
- mjpeg_encode_dc(s, diff, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
+ ff_mjpeg_encode_dc(s, diff, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
}
}
}
}else{
int mb_x, mb_y, i;
- const int mb_width = (width + s->mjpeg_hsample[0] - 1) / s->mjpeg_hsample[0];
- const int mb_height = (height + s->mjpeg_vsample[0] - 1) / s->mjpeg_vsample[0];
for(mb_y = 0; mb_y < mb_height; mb_y++) {
if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < mb_width * 4 * 3 * s->mjpeg_hsample[0] * s->mjpeg_vsample[0]){
}
if(i==0)
- mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
+ ff_mjpeg_encode_dc(s, *ptr - pred, m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
else
- mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
+ ff_mjpeg_encode_dc(s, *ptr - pred, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
}
}
}
int pred;
ptr = p->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
-//printf("%d %d %d %d %8X\n", mb_x, mb_y, x, y, ptr);
PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
if(i==0)
- mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
+ ff_mjpeg_encode_dc(s, *ptr - pred, m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
else
- mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
+ ff_mjpeg_encode_dc(s, *ptr - pred, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
}
}
}
emms_c();
- mjpeg_picture_trailer(s);
+ ff_mjpeg_encode_picture_trailer(s);
s->picture_number++;
flush_put_bits(&s->pb);
- return pbBufPtr(&s->pb) - s->pb.buf;
+ pkt->size = put_bits_ptr(&s->pb) - s->pb.buf;
+ pkt->flags |= AV_PKT_FLAG_KEY;
+ *got_packet = 1;
+
+ return 0;
// return (put_bits_count(&f->pb)+7)/8;
}
-AVCodec ljpeg_encoder = { //FIXME avoid MPV_* lossless jpeg shouldnt need them
- "ljpeg",
- CODEC_TYPE_VIDEO,
- CODEC_ID_LJPEG,
- sizeof(MpegEncContext),
- MPV_encode_init,
- encode_picture_lossless,
- MPV_encode_end,
+AVCodec ff_ljpeg_encoder = { //FIXME avoid MPV_* lossless JPEG should not need them
+ .name = "ljpeg",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_LJPEG,
+ .priv_data_size = sizeof(MpegEncContext),
+ .init = ff_MPV_encode_init,
+ .encode2 = encode_picture_lossless,
+ .close = ff_MPV_encode_end,
+ .long_name = NULL_IF_CONFIG_SMALL("Lossless JPEG"),
};
projects / ffmpeg / blobdiff