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1 | /* | ||
2 | * Sunplus JPEG decoder (SP5X) | ||
3 | * Copyright (c) 2003 Alex Beregszaszi | ||
4 | * | ||
5 | * This file is part of FFmpeg. | ||
6 | * | ||
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. | ||
11 | * | ||
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. | ||
16 | * | ||
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 | ||
20 | */ | ||
21 | |||
22 | /** | ||
23 | * @file | ||
24 | * Sunplus JPEG decoder (SP5X). | ||
25 | */ | ||
26 | |||
27 | #include "config_components.h" | ||
28 | |||
29 | #include "libavutil/mem.h" | ||
30 | #include "avcodec.h" | ||
31 | #include "codec_internal.h" | ||
32 | #include "mjpegdec.h" | ||
33 | #include "sp5x.h" | ||
34 | |||
35 | |||
36 | 379 | static int sp5x_decode_frame(AVCodecContext *avctx, | |
37 | AVFrame *frame, int *got_frame, | ||
38 | AVPacket *avpkt) | ||
39 | { | ||
40 | 379 | const uint8_t *buf = avpkt->data; | |
41 | 379 | int buf_size = avpkt->size; | |
42 | uint8_t *recoded; | ||
43 | 379 | int i = 0, j = 0; | |
44 | int ret; | ||
45 | |||
46 |
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379 | if (!avctx->width || !avctx->height) |
47 | ✗ | return -1; | |
48 | |||
49 | 379 | recoded = av_mallocz(buf_size + 1024); | |
50 |
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379 | if (!recoded) |
51 | ✗ | return -1; | |
52 | |||
53 | /* SOI */ | ||
54 | 379 | recoded[j++] = 0xFF; | |
55 | 379 | recoded[j++] = 0xD8; | |
56 | |||
57 | 379 | memcpy(recoded+j, &sp5x_data_dqt[0], sizeof(sp5x_data_dqt)); | |
58 | 379 | memcpy(recoded + j + 5, &sp5x_qscale_five_quant_table[0], 64); | |
59 | 379 | memcpy(recoded + j + 70, &sp5x_qscale_five_quant_table[1], 64); | |
60 | 379 | j += sizeof(sp5x_data_dqt); | |
61 | |||
62 | 379 | memcpy(recoded+j, &sp5x_data_dht[0], sizeof(sp5x_data_dht)); | |
63 | 379 | j += sizeof(sp5x_data_dht); | |
64 | |||
65 | 379 | memcpy(recoded+j, &sp5x_data_sof[0], sizeof(sp5x_data_sof)); | |
66 | 379 | AV_WB16(recoded+j+5, avctx->coded_height); | |
67 | 379 | AV_WB16(recoded+j+7, avctx->coded_width); | |
68 | 379 | j += sizeof(sp5x_data_sof); | |
69 | |||
70 | 379 | memcpy(recoded+j, &sp5x_data_sos[0], sizeof(sp5x_data_sos)); | |
71 | 379 | j += sizeof(sp5x_data_sos); | |
72 | |||
73 |
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379 | if(avctx->codec_id==AV_CODEC_ID_AMV) |
74 |
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3662472 | for (i = 2; i < buf_size-2 && j < buf_size+1024-2; i++) |
75 | 3662104 | recoded[j++] = buf[i]; | |
76 | else | ||
77 |
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39435 | for (i = 14; i < buf_size && j < buf_size+1024-3; i++) |
78 | { | ||
79 | 39424 | recoded[j++] = buf[i]; | |
80 |
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39424 | if (buf[i] == 0xff) |
81 | 93 | recoded[j++] = 0; | |
82 | } | ||
83 | |||
84 | /* EOI */ | ||
85 | 379 | recoded[j++] = 0xFF; | |
86 | 379 | recoded[j++] = 0xD9; | |
87 | |||
88 | 379 | ret = ff_mjpeg_decode_frame_from_buf(avctx, frame, got_frame, | |
89 | avpkt, recoded, j); | ||
90 | |||
91 | 379 | av_free(recoded); | |
92 | |||
93 |
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379 | return ret < 0 ? ret : avpkt->size; |
94 | } | ||
95 | |||
96 | #if CONFIG_SP5X_DECODER | ||
97 | const FFCodec ff_sp5x_decoder = { | ||
98 | .p.name = "sp5x", | ||
99 | CODEC_LONG_NAME("Sunplus JPEG (SP5X)"), | ||
100 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
101 | .p.id = AV_CODEC_ID_SP5X, | ||
102 | .priv_data_size = sizeof(MJpegDecodeContext), | ||
103 | .init = ff_mjpeg_decode_init, | ||
104 | .close = ff_mjpeg_decode_end, | ||
105 | FF_CODEC_DECODE_CB(sp5x_decode_frame), | ||
106 | .p.capabilities = AV_CODEC_CAP_DR1, | ||
107 | .p.max_lowres = 3, | ||
108 | .caps_internal = FF_CODEC_CAP_INIT_CLEANUP, | ||
109 | }; | ||
110 | #endif | ||
111 | #if CONFIG_AMV_DECODER | ||
112 | const FFCodec ff_amv_decoder = { | ||
113 | .p.name = "amv", | ||
114 | CODEC_LONG_NAME("AMV Video"), | ||
115 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
116 | .p.id = AV_CODEC_ID_AMV, | ||
117 | .priv_data_size = sizeof(MJpegDecodeContext), | ||
118 | .init = ff_mjpeg_decode_init, | ||
119 | .close = ff_mjpeg_decode_end, | ||
120 | FF_CODEC_DECODE_CB(sp5x_decode_frame), | ||
121 | .p.max_lowres = 3, | ||
122 | .p.capabilities = AV_CODEC_CAP_DR1, | ||
123 | .caps_internal = FF_CODEC_CAP_INIT_CLEANUP, | ||
124 | }; | ||
125 | #endif | ||
126 |