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