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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6147 | serge | 1 | /* |
| 2 | * Sunplus JPEG decoder (SP5X) |
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| 3 | * Copyright (c) 2003 Alex Beregszaszi |
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| 4 | * |
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| 5 | * This file is part of FFmpeg. |
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| 6 | * |
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| 7 | * FFmpeg is free software; you can redistribute it and/or |
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| 8 | * modify it under the terms of the GNU Lesser General Public |
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| 9 | * License as published by the Free Software Foundation; either |
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| 10 | * version 2.1 of the License, or (at your option) any later version. |
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| 11 | * |
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| 12 | * FFmpeg is distributed in the hope that it will be useful, |
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | * Lesser General Public License for more details. |
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| 16 | * |
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| 17 | * You should have received a copy of the GNU Lesser General Public |
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| 18 | * License along with FFmpeg; if not, write to the Free Software |
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| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 20 | */ |
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| 21 | |||
| 22 | /** |
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| 23 | * @file |
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| 24 | * Sunplus JPEG decoder (SP5X). |
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| 25 | */ |
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| 26 | |||
| 27 | #include "avcodec.h" |
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| 28 | #include "internal.h" |
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| 29 | #include "mjpeg.h" |
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| 30 | #include "mjpegdec.h" |
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| 31 | #include "sp5x.h" |
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| 32 | |||
| 33 | |||
| 34 | static int sp5x_decode_frame(AVCodecContext *avctx, |
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| 35 | void *data, int *got_frame, |
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| 36 | AVPacket *avpkt) |
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| 37 | { |
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| 38 | const uint8_t *buf = avpkt->data; |
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| 39 | int buf_size = avpkt->size; |
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| 40 | AVPacket avpkt_recoded; |
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| 41 | const int qscale = 5; |
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| 42 | uint8_t *recoded; |
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| 43 | int i = 0, j = 0; |
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| 44 | |||
| 45 | if (!avctx->width || !avctx->height) |
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| 46 | return -1; |
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| 47 | |||
| 48 | recoded = av_mallocz(buf_size + 1024); |
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| 49 | if (!recoded) |
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| 50 | return -1; |
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| 51 | |||
| 52 | /* SOI */ |
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| 53 | recoded[j++] = 0xFF; |
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| 54 | recoded[j++] = 0xD8; |
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| 55 | |||
| 56 | memcpy(recoded+j, &sp5x_data_dqt[0], sizeof(sp5x_data_dqt)); |
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| 57 | memcpy(recoded+j+5, &sp5x_quant_table[qscale * 2], 64); |
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| 58 | memcpy(recoded+j+70, &sp5x_quant_table[(qscale * 2) + 1], 64); |
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| 59 | j += sizeof(sp5x_data_dqt); |
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| 60 | |||
| 61 | memcpy(recoded+j, &sp5x_data_dht[0], sizeof(sp5x_data_dht)); |
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| 62 | j += sizeof(sp5x_data_dht); |
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| 63 | |||
| 64 | memcpy(recoded+j, &sp5x_data_sof[0], sizeof(sp5x_data_sof)); |
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| 65 | AV_WB16(recoded+j+5, avctx->coded_height); |
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| 66 | AV_WB16(recoded+j+7, avctx->coded_width); |
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| 67 | j += sizeof(sp5x_data_sof); |
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| 68 | |||
| 69 | memcpy(recoded+j, &sp5x_data_sos[0], sizeof(sp5x_data_sos)); |
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| 70 | j += sizeof(sp5x_data_sos); |
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| 71 | |||
| 72 | if(avctx->codec_id==AV_CODEC_ID_AMV) |
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| 73 | for (i = 2; i < buf_size-2 && j < buf_size+1024-2; i++) |
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| 74 | recoded[j++] = buf[i]; |
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| 75 | else |
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| 76 | for (i = 14; i < buf_size && j < buf_size+1024-3; i++) |
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| 77 | { |
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| 78 | recoded[j++] = buf[i]; |
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| 79 | if (buf[i] == 0xff) |
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| 80 | recoded[j++] = 0; |
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| 81 | } |
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| 82 | |||
| 83 | /* EOI */ |
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| 84 | recoded[j++] = 0xFF; |
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| 85 | recoded[j++] = 0xD9; |
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| 86 | |||
| 87 | av_init_packet(&avpkt_recoded); |
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| 88 | avpkt_recoded.data = recoded; |
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| 89 | avpkt_recoded.size = j; |
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| 90 | i = ff_mjpeg_decode_frame(avctx, data, got_frame, &avpkt_recoded); |
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| 91 | |||
| 92 | av_free(recoded); |
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| 93 | |||
| 94 | return i < 0 ? i : avpkt->size; |
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| 95 | } |
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| 96 | |||
| 97 | #if CONFIG_SP5X_DECODER |
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| 98 | AVCodec ff_sp5x_decoder = { |
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| 99 | .name = "sp5x", |
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| 100 | .long_name = NULL_IF_CONFIG_SMALL("Sunplus JPEG (SP5X)"), |
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| 101 | .type = AVMEDIA_TYPE_VIDEO, |
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| 102 | .id = AV_CODEC_ID_SP5X, |
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| 103 | .priv_data_size = sizeof(MJpegDecodeContext), |
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| 104 | .init = ff_mjpeg_decode_init, |
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| 105 | .close = ff_mjpeg_decode_end, |
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| 106 | .decode = sp5x_decode_frame, |
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| 107 | .capabilities = AV_CODEC_CAP_DR1, |
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| 108 | .max_lowres = 3, |
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| 109 | .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, |
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| 110 | }; |
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| 111 | #endif |
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| 112 | #if CONFIG_AMV_DECODER |
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| 113 | AVCodec ff_amv_decoder = { |
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| 114 | .name = "amv", |
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| 115 | .long_name = NULL_IF_CONFIG_SMALL("AMV Video"), |
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| 116 | .type = AVMEDIA_TYPE_VIDEO, |
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| 117 | .id = AV_CODEC_ID_AMV, |
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| 118 | .priv_data_size = sizeof(MJpegDecodeContext), |
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| 119 | .init = ff_mjpeg_decode_init, |
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| 120 | .close = ff_mjpeg_decode_end, |
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| 121 | .decode = sp5x_decode_frame, |
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| 122 | .max_lowres = 3, |
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| 123 | .capabilities = AV_CODEC_CAP_DR1, |
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| 124 | .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, |
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| 125 | }; |
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| 126 | #endif |