Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 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 "avcodec.h" |
||
| 28 | #include "mjpeg.h" |
||
| 29 | #include "mjpegdec.h" |
||
| 30 | #include "sp5x.h" |
||
| 31 | |||
| 32 | |||
| 33 | static int sp5x_decode_frame(AVCodecContext *avctx, |
||
| 34 | void *data, int *got_frame, |
||
| 35 | AVPacket *avpkt) |
||
| 36 | { |
||
| 37 | const uint8_t *buf = avpkt->data; |
||
| 38 | int buf_size = avpkt->size; |
||
| 39 | AVPacket avpkt_recoded; |
||
| 40 | const int qscale = 5; |
||
| 41 | uint8_t *recoded; |
||
| 42 | int i = 0, j = 0; |
||
| 43 | |||
| 44 | if (!avctx->width || !avctx->height) |
||
| 45 | return -1; |
||
| 46 | |||
| 47 | recoded = av_mallocz(buf_size + 1024); |
||
| 48 | if (!recoded) |
||
| 49 | return -1; |
||
| 50 | |||
| 51 | /* SOI */ |
||
| 52 | recoded[j++] = 0xFF; |
||
| 53 | recoded[j++] = 0xD8; |
||
| 54 | |||
| 55 | memcpy(recoded+j, &sp5x_data_dqt[0], sizeof(sp5x_data_dqt)); |
||
| 56 | memcpy(recoded+j+5, &sp5x_quant_table[qscale * 2], 64); |
||
| 57 | memcpy(recoded+j+70, &sp5x_quant_table[(qscale * 2) + 1], 64); |
||
| 58 | j += sizeof(sp5x_data_dqt); |
||
| 59 | |||
| 60 | memcpy(recoded+j, &sp5x_data_dht[0], sizeof(sp5x_data_dht)); |
||
| 61 | j += sizeof(sp5x_data_dht); |
||
| 62 | |||
| 63 | memcpy(recoded+j, &sp5x_data_sof[0], sizeof(sp5x_data_sof)); |
||
| 64 | AV_WB16(recoded+j+5, avctx->coded_height); |
||
| 65 | AV_WB16(recoded+j+7, avctx->coded_width); |
||
| 66 | j += sizeof(sp5x_data_sof); |
||
| 67 | |||
| 68 | memcpy(recoded+j, &sp5x_data_sos[0], sizeof(sp5x_data_sos)); |
||
| 69 | j += sizeof(sp5x_data_sos); |
||
| 70 | |||
| 71 | if(avctx->codec_id==AV_CODEC_ID_AMV) |
||
| 72 | for (i = 2; i < buf_size-2 && j < buf_size+1024-2; i++) |
||
| 73 | recoded[j++] = buf[i]; |
||
| 74 | else |
||
| 75 | for (i = 14; i < buf_size && j < buf_size+1024-3; i++) |
||
| 76 | { |
||
| 77 | recoded[j++] = buf[i]; |
||
| 78 | if (buf[i] == 0xff) |
||
| 79 | recoded[j++] = 0; |
||
| 80 | } |
||
| 81 | |||
| 82 | /* EOI */ |
||
| 83 | recoded[j++] = 0xFF; |
||
| 84 | recoded[j++] = 0xD9; |
||
| 85 | |||
| 86 | av_init_packet(&avpkt_recoded); |
||
| 87 | avpkt_recoded.data = recoded; |
||
| 88 | avpkt_recoded.size = j; |
||
| 89 | i = ff_mjpeg_decode_frame(avctx, data, got_frame, &avpkt_recoded); |
||
| 90 | |||
| 91 | av_free(recoded); |
||
| 92 | |||
| 93 | return i < 0 ? i : avpkt->size; |
||
| 94 | } |
||
| 95 | |||
| 96 | #if CONFIG_SP5X_DECODER |
||
| 97 | AVCodec ff_sp5x_decoder = { |
||
| 98 | .name = "sp5x", |
||
| 99 | .long_name = NULL_IF_CONFIG_SMALL("Sunplus JPEG (SP5X)"), |
||
| 100 | .type = AVMEDIA_TYPE_VIDEO, |
||
| 101 | .id = AV_CODEC_ID_SP5X, |
||
| 102 | .priv_data_size = sizeof(MJpegDecodeContext), |
||
| 103 | .init = ff_mjpeg_decode_init, |
||
| 104 | .close = ff_mjpeg_decode_end, |
||
| 105 | .decode = sp5x_decode_frame, |
||
| 106 | .capabilities = CODEC_CAP_DR1, |
||
| 107 | .max_lowres = 3, |
||
| 108 | }; |
||
| 109 | #endif |
||
| 110 | #if CONFIG_AMV_DECODER |
||
| 111 | AVCodec ff_amv_decoder = { |
||
| 112 | .name = "amv", |
||
| 113 | .long_name = NULL_IF_CONFIG_SMALL("AMV Video"), |
||
| 114 | .type = AVMEDIA_TYPE_VIDEO, |
||
| 115 | .id = AV_CODEC_ID_AMV, |
||
| 116 | .priv_data_size = sizeof(MJpegDecodeContext), |
||
| 117 | .init = ff_mjpeg_decode_init, |
||
| 118 | .close = ff_mjpeg_decode_end, |
||
| 119 | .decode = sp5x_decode_frame, |
||
| 120 | }; |
||
| 121 | #endif |