2 * Sunplus JPEG decoder (SP5X)
3 * Copyright (c) 2003 Alex Beregszaszi
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * Sunplus JPEG decoder (SP5X).
33 static int sp5x_decode_frame(AVCodecContext *avctx,
34 void *data, int *data_size,
37 const uint8_t *buf = avpkt->data;
38 int buf_size = avpkt->size;
39 AVPacket avpkt_recoded;
41 const uint8_t *buf_ptr;
45 if (!avctx->width || !avctx->height)
50 recoded = av_mallocz(buf_size + 1024);
58 memcpy(recoded+j, &sp5x_data_dqt[0], sizeof(sp5x_data_dqt));
59 memcpy(recoded+j+5, &sp5x_quant_table[qscale * 2], 64);
60 memcpy(recoded+j+70, &sp5x_quant_table[(qscale * 2) + 1], 64);
61 j += sizeof(sp5x_data_dqt);
63 memcpy(recoded+j, &sp5x_data_dht[0], sizeof(sp5x_data_dht));
64 j += sizeof(sp5x_data_dht);
66 memcpy(recoded+j, &sp5x_data_sof[0], sizeof(sp5x_data_sof));
67 AV_WB16(recoded+j+5, avctx->coded_height);
68 AV_WB16(recoded+j+7, avctx->coded_width);
69 j += sizeof(sp5x_data_sof);
71 memcpy(recoded+j, &sp5x_data_sos[0], sizeof(sp5x_data_sos));
72 j += sizeof(sp5x_data_sos);
74 if(avctx->codec_id==CODEC_ID_AMV)
75 for (i = 2; i < buf_size-2 && j < buf_size+1024-2; i++)
76 recoded[j++] = buf[i];
78 for (i = 14; i < buf_size && j < buf_size+1024-2; i++)
80 recoded[j++] = buf[i];
89 avctx->flags &= ~CODEC_FLAG_EMU_EDGE;
90 av_init_packet(&avpkt_recoded);
91 avpkt_recoded.data = recoded;
92 avpkt_recoded.size = j;
93 i = ff_mjpeg_decode_frame(avctx, data, data_size, &avpkt_recoded);
100 AVCodec sp5x_decoder = {
104 sizeof(MJpegDecodeContext),
105 ff_mjpeg_decode_init,
112 .long_name = NULL_IF_CONFIG_SMALL("Sunplus JPEG (SP5X)"),
115 AVCodec amv_decoder = {
119 sizeof(MJpegDecodeContext),
120 ff_mjpeg_decode_init,
125 .long_name = NULL_IF_CONFIG_SMALL("AMV Video"),