| Line | Branch | Exec | Source |
|---|---|---|---|
| 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 | 381 | static int sp5x_decode_frame(AVCodecContext *avctx, | |
| 37 | AVFrame *frame, int *got_frame, | ||
| 38 | AVPacket *avpkt) | ||
| 39 | { | ||
| 40 | 381 | const uint8_t *buf = avpkt->data; | |
| 41 | 381 | int buf_size = avpkt->size; | |
| 42 | uint8_t *recoded; | ||
| 43 | 381 | int i = 0, j = 0; | |
| 44 | int ret; | ||
| 45 | |||
| 46 |
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381 | if (!avctx->width || !avctx->height) |
| 47 | ✗ | return -1; | |
| 48 | |||
| 49 | 381 | recoded = av_mallocz(buf_size + 1024); | |
| 50 |
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381 | if (!recoded) |
| 51 | ✗ | return -1; | |
| 52 | |||
| 53 | /* SOI */ | ||
| 54 | 381 | recoded[j++] = 0xFF; | |
| 55 | 381 | recoded[j++] = 0xD8; | |
| 56 | |||
| 57 | 381 | memcpy(recoded+j, &sp5x_data_dqt[0], sizeof(sp5x_data_dqt)); | |
| 58 | 381 | memcpy(recoded + j + 5, &sp5x_qscale_five_quant_table[0], 64); | |
| 59 | 381 | memcpy(recoded + j + 70, &sp5x_qscale_five_quant_table[1], 64); | |
| 60 | 381 | j += sizeof(sp5x_data_dqt); | |
| 61 | |||
| 62 | 381 | memcpy(recoded+j, &sp5x_data_dht[0], sizeof(sp5x_data_dht)); | |
| 63 | 381 | j += sizeof(sp5x_data_dht); | |
| 64 | |||
| 65 | 381 | memcpy(recoded+j, &sp5x_data_sof[0], sizeof(sp5x_data_sof)); | |
| 66 | 381 | AV_WB16(recoded+j+5, avctx->coded_height); | |
| 67 | 381 | AV_WB16(recoded+j+7, avctx->coded_width); | |
| 68 | 381 | j += sizeof(sp5x_data_sof); | |
| 69 | |||
| 70 | 381 | memcpy(recoded+j, &sp5x_data_sos[0], sizeof(sp5x_data_sos)); | |
| 71 | 381 | j += sizeof(sp5x_data_sos); | |
| 72 | |||
| 73 |
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381 | if(avctx->codec_id==AV_CODEC_ID_AMV) |
| 74 |
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3668599 | for (i = 2; i < buf_size-2 && j < buf_size+1024-2; i++) |
| 75 | 3668229 | 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 | 381 | recoded[j++] = 0xFF; | |
| 86 | 381 | recoded[j++] = 0xD9; | |
| 87 | |||
| 88 | 381 | ret = ff_mjpeg_decode_frame_from_buf(avctx, frame, got_frame, | |
| 89 | avpkt, recoded, j); | ||
| 90 | |||
| 91 | 381 | av_free(recoded); | |
| 92 | |||
| 93 |
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381 | 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 |