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 int ff_sp5x_process_packet(AVCodecContext *avctx, AVPacket *avpkt)
35 const uint8_t *buf = avpkt->data;
36 int buf_size = avpkt->size;
37 AVBufferRef *buf_recoded;
42 if (!avctx->width || !avctx->height)
45 buf_recoded = av_buffer_allocz(buf_size + 1024);
48 recoded = buf_recoded->data;
54 memcpy(recoded+j, &sp5x_data_dqt[0], sizeof(sp5x_data_dqt));
55 memcpy(recoded+j+5, &sp5x_quant_table[qscale * 2], 64);
56 memcpy(recoded+j+70, &sp5x_quant_table[(qscale * 2) + 1], 64);
57 j += sizeof(sp5x_data_dqt);
59 memcpy(recoded+j, &sp5x_data_dht[0], sizeof(sp5x_data_dht));
60 j += sizeof(sp5x_data_dht);
62 memcpy(recoded+j, &sp5x_data_sof[0], sizeof(sp5x_data_sof));
63 AV_WB16(recoded+j+5, avctx->coded_height);
64 AV_WB16(recoded+j+7, avctx->coded_width);
65 j += sizeof(sp5x_data_sof);
67 memcpy(recoded+j, &sp5x_data_sos[0], sizeof(sp5x_data_sos));
68 j += sizeof(sp5x_data_sos);
70 if(avctx->codec_id==AV_CODEC_ID_AMV)
71 for (i = 2; i < buf_size-2 && j < buf_size+1024-2; i++)
72 recoded[j++] = buf[i];
74 for (i = 14; i < buf_size && j < buf_size+1024-3; i++)
76 recoded[j++] = buf[i];
85 av_buffer_unref(&avpkt->buf);
86 avpkt->buf = buf_recoded;
87 avpkt->data = recoded;
93 #if CONFIG_SP5X_DECODER
94 AVCodec ff_sp5x_decoder = {
96 .long_name = NULL_IF_CONFIG_SMALL("Sunplus JPEG (SP5X)"),
97 .type = AVMEDIA_TYPE_VIDEO,
98 .id = AV_CODEC_ID_SP5X,
99 .priv_data_size = sizeof(MJpegDecodeContext),
100 .init = ff_mjpeg_decode_init,
101 .close = ff_mjpeg_decode_end,
102 .receive_frame = ff_mjpeg_receive_frame,
103 .capabilities = AV_CODEC_CAP_DR1,
105 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP |
106 FF_CODEC_CAP_SETS_PKT_DTS,
109 #if CONFIG_AMV_DECODER
110 AVCodec ff_amv_decoder = {
112 .long_name = NULL_IF_CONFIG_SMALL("AMV Video"),
113 .type = AVMEDIA_TYPE_VIDEO,
114 .id = AV_CODEC_ID_AMV,
115 .priv_data_size = sizeof(MJpegDecodeContext),
116 .init = ff_mjpeg_decode_init,
117 .close = ff_mjpeg_decode_end,
118 .receive_frame = ff_mjpeg_receive_frame,
120 .capabilities = AV_CODEC_CAP_DR1,
121 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP |
122 FF_CODEC_CAP_SETS_PKT_DTS,