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00027 #include "avcodec.h"
00028 #include "mjpeg.h"
00029 #include "mjpegdec.h"
00030 #include "sp5x.h"
00031
00032
00033 static int sp5x_decode_frame(AVCodecContext *avctx,
00034 void *data, int *data_size,
00035 AVPacket *avpkt)
00036 {
00037 const uint8_t *buf = avpkt->data;
00038 int buf_size = avpkt->size;
00039 AVPacket avpkt_recoded;
00040 #if 0
00041 MJpegDecodeContext *s = avctx->priv_data;
00042 #endif
00043 const int qscale = 5;
00044 const uint8_t *buf_ptr;
00045 uint8_t *recoded;
00046 int i = 0, j = 0;
00047
00048 if (!avctx->width || !avctx->height)
00049 return -1;
00050
00051 buf_ptr = buf;
00052
00053 #if 1
00054 recoded = av_mallocz(buf_size + 1024);
00055 if (!recoded)
00056 return -1;
00057
00058
00059 recoded[j++] = 0xFF;
00060 recoded[j++] = 0xD8;
00061
00062 memcpy(recoded+j, &sp5x_data_dqt[0], sizeof(sp5x_data_dqt));
00063 memcpy(recoded+j+5, &sp5x_quant_table[qscale * 2], 64);
00064 memcpy(recoded+j+70, &sp5x_quant_table[(qscale * 2) + 1], 64);
00065 j += sizeof(sp5x_data_dqt);
00066
00067 memcpy(recoded+j, &sp5x_data_dht[0], sizeof(sp5x_data_dht));
00068 j += sizeof(sp5x_data_dht);
00069
00070 memcpy(recoded+j, &sp5x_data_sof[0], sizeof(sp5x_data_sof));
00071 AV_WB16(recoded+j+5, avctx->coded_height);
00072 AV_WB16(recoded+j+7, avctx->coded_width);
00073 j += sizeof(sp5x_data_sof);
00074
00075 memcpy(recoded+j, &sp5x_data_sos[0], sizeof(sp5x_data_sos));
00076 j += sizeof(sp5x_data_sos);
00077
00078 if(avctx->codec_id==CODEC_ID_AMV)
00079 for (i = 2; i < buf_size-2 && j < buf_size+1024-2; i++)
00080 recoded[j++] = buf[i];
00081 else
00082 for (i = 14; i < buf_size && j < buf_size+1024-2; i++)
00083 {
00084 recoded[j++] = buf[i];
00085 if (buf[i] == 0xff)
00086 recoded[j++] = 0;
00087 }
00088
00089
00090 recoded[j++] = 0xFF;
00091 recoded[j++] = 0xD9;
00092
00093 avctx->flags &= ~CODEC_FLAG_EMU_EDGE;
00094 av_init_packet(&avpkt_recoded);
00095 avpkt_recoded.data = recoded;
00096 avpkt_recoded.size = j;
00097 i = ff_mjpeg_decode_frame(avctx, data, data_size, &avpkt_recoded);
00098
00099 av_free(recoded);
00100
00101 #else
00102
00103 s->bits = 8;
00104 s->width = avctx->coded_width;
00105 s->height = avctx->coded_height;
00106 s->nb_components = 3;
00107 s->component_id[0] = 0;
00108 s->h_count[0] = 2;
00109 s->v_count[0] = 2;
00110 s->quant_index[0] = 0;
00111 s->component_id[1] = 1;
00112 s->h_count[1] = 1;
00113 s->v_count[1] = 1;
00114 s->quant_index[1] = 1;
00115 s->component_id[2] = 2;
00116 s->h_count[2] = 1;
00117 s->v_count[2] = 1;
00118 s->quant_index[2] = 1;
00119 s->h_max = 2;
00120 s->v_max = 2;
00121
00122 s->qscale_table = av_mallocz((s->width+15)/16);
00123 avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420;
00124 s->interlaced = 0;
00125
00126 s->picture.reference = 0;
00127 if (avctx->get_buffer(avctx, &s->picture) < 0)
00128 {
00129 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
00130 return -1;
00131 }
00132
00133 s->picture.pict_type = FF_I_TYPE;
00134 s->picture.key_frame = 1;
00135
00136 for (i = 0; i < 3; i++)
00137 s->linesize[i] = s->picture.linesize[i] << s->interlaced;
00138
00139
00140 for (i = 0; i < 64; i++)
00141 {
00142 j = s->scantable.permutated[i];
00143 s->quant_matrixes[0][j] = sp5x_quant_table[(qscale * 2) + i];
00144 }
00145 s->qscale[0] = FFMAX(
00146 s->quant_matrixes[0][s->scantable.permutated[1]],
00147 s->quant_matrixes[0][s->scantable.permutated[8]]) >> 1;
00148
00149 for (i = 0; i < 64; i++)
00150 {
00151 j = s->scantable.permutated[i];
00152 s->quant_matrixes[1][j] = sp5x_quant_table[(qscale * 2) + 1 + i];
00153 }
00154 s->qscale[1] = FFMAX(
00155 s->quant_matrixes[1][s->scantable.permutated[1]],
00156 s->quant_matrixes[1][s->scantable.permutated[8]]) >> 1;
00157
00158
00159
00160
00161 s->comp_index[0] = 0;
00162 s->nb_blocks[0] = s->h_count[0] * s->v_count[0];
00163 s->h_scount[0] = s->h_count[0];
00164 s->v_scount[0] = s->v_count[0];
00165 s->dc_index[0] = 0;
00166 s->ac_index[0] = 0;
00167
00168 s->comp_index[1] = 1;
00169 s->nb_blocks[1] = s->h_count[1] * s->v_count[1];
00170 s->h_scount[1] = s->h_count[1];
00171 s->v_scount[1] = s->v_count[1];
00172 s->dc_index[1] = 1;
00173 s->ac_index[1] = 1;
00174
00175 s->comp_index[2] = 2;
00176 s->nb_blocks[2] = s->h_count[2] * s->v_count[2];
00177 s->h_scount[2] = s->h_count[2];
00178 s->v_scount[2] = s->v_count[2];
00179 s->dc_index[2] = 1;
00180 s->ac_index[2] = 1;
00181
00182 for (i = 0; i < 3; i++)
00183 s->last_dc[i] = 1024;
00184
00185 s->mb_width = (s->width * s->h_max * 8 -1) / (s->h_max * 8);
00186 s->mb_height = (s->height * s->v_max * 8 -1) / (s->v_max * 8);
00187
00188 init_get_bits(&s->gb, buf+14, (buf_size-14)*8);
00189
00190 return mjpeg_decode_scan(s);
00191 #endif
00192
00193 return i;
00194 }
00195
00196 AVCodec sp5x_decoder = {
00197 "sp5x",
00198 AVMEDIA_TYPE_VIDEO,
00199 CODEC_ID_SP5X,
00200 sizeof(MJpegDecodeContext),
00201 ff_mjpeg_decode_init,
00202 NULL,
00203 ff_mjpeg_decode_end,
00204 sp5x_decode_frame,
00205 CODEC_CAP_DR1,
00206 NULL,
00207 .long_name = NULL_IF_CONFIG_SMALL("Sunplus JPEG (SP5X)"),
00208 };
00209
00210 AVCodec amv_decoder = {
00211 "amv",
00212 AVMEDIA_TYPE_VIDEO,
00213 CODEC_ID_AMV,
00214 sizeof(MJpegDecodeContext),
00215 ff_mjpeg_decode_init,
00216 NULL,
00217 ff_mjpeg_decode_end,
00218 sp5x_decode_frame,
00219 CODEC_CAP_DR1,
00220 .long_name = NULL_IF_CONFIG_SMALL("AMV Video"),
00221 };