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00027 #include "avcodec.h"
00028 #include "imgconvert.h"
00029 #include "raw.h"
00030 #include "libavutil/intreadwrite.h"
00031 #include "libavutil/imgutils.h"
00032
00033 typedef struct RawVideoContext {
00034 uint32_t palette[AVPALETTE_COUNT];
00035 unsigned char * buffer;
00036 int length;
00037 int flip;
00038 AVFrame pic;
00039 } RawVideoContext;
00040
00041 static const PixelFormatTag pix_fmt_bps_avi[] = {
00042 { PIX_FMT_PAL8, 4 },
00043 { PIX_FMT_PAL8, 8 },
00044 { PIX_FMT_RGB444, 12 },
00045 { PIX_FMT_RGB555, 15 },
00046 { PIX_FMT_RGB555, 16 },
00047 { PIX_FMT_BGR24, 24 },
00048 { PIX_FMT_RGB32, 32 },
00049 { PIX_FMT_NONE, 0 },
00050 };
00051
00052 static const PixelFormatTag pix_fmt_bps_mov[] = {
00053 { PIX_FMT_MONOWHITE, 1 },
00054 { PIX_FMT_PAL8, 2 },
00055 { PIX_FMT_PAL8, 4 },
00056 { PIX_FMT_PAL8, 8 },
00057
00058
00059 { PIX_FMT_RGB555BE, 16 },
00060 { PIX_FMT_RGB24, 24 },
00061 { PIX_FMT_ARGB, 32 },
00062 { PIX_FMT_MONOWHITE,33 },
00063 { PIX_FMT_NONE, 0 },
00064 };
00065
00066 static enum PixelFormat find_pix_fmt(const PixelFormatTag *tags, unsigned int fourcc)
00067 {
00068 while (tags->pix_fmt >= 0) {
00069 if (tags->fourcc == fourcc)
00070 return tags->pix_fmt;
00071 tags++;
00072 }
00073 return PIX_FMT_YUV420P;
00074 }
00075
00076 static av_cold int raw_init_decoder(AVCodecContext *avctx)
00077 {
00078 RawVideoContext *context = avctx->priv_data;
00079
00080 if (avctx->codec_tag == MKTAG('r','a','w',' '))
00081 avctx->pix_fmt = find_pix_fmt(pix_fmt_bps_mov, avctx->bits_per_coded_sample);
00082 else if (avctx->codec_tag == MKTAG('W','R','A','W'))
00083 avctx->pix_fmt = find_pix_fmt(pix_fmt_bps_avi, avctx->bits_per_coded_sample);
00084 else if (avctx->codec_tag)
00085 avctx->pix_fmt = find_pix_fmt(ff_raw_pix_fmt_tags, avctx->codec_tag);
00086 else if (avctx->pix_fmt == PIX_FMT_NONE && avctx->bits_per_coded_sample)
00087 avctx->pix_fmt = find_pix_fmt(pix_fmt_bps_avi, avctx->bits_per_coded_sample);
00088
00089 ff_set_systematic_pal2(context->palette, avctx->pix_fmt);
00090 context->length = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
00091 if((avctx->bits_per_coded_sample == 4 || avctx->bits_per_coded_sample == 2) &&
00092 avctx->pix_fmt==PIX_FMT_PAL8 &&
00093 (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))){
00094 context->buffer = av_malloc(context->length);
00095 if (!context->buffer)
00096 return -1;
00097 }
00098 context->pic.pict_type = AV_PICTURE_TYPE_I;
00099 context->pic.key_frame = 1;
00100
00101 avctx->coded_frame= &context->pic;
00102
00103 if((avctx->extradata_size >= 9 && !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) ||
00104 avctx->codec_tag == MKTAG(3, 0, 0, 0) || avctx->codec_tag == MKTAG('W','R','A','W'))
00105 context->flip=1;
00106
00107 return 0;
00108 }
00109
00110 static void flip(AVCodecContext *avctx, AVPicture * picture){
00111 picture->data[0] += picture->linesize[0] * (avctx->height-1);
00112 picture->linesize[0] *= -1;
00113 }
00114
00115 static int raw_decode(AVCodecContext *avctx,
00116 void *data, int *data_size,
00117 AVPacket *avpkt)
00118 {
00119 const uint8_t *buf = avpkt->data;
00120 int buf_size = avpkt->size;
00121 RawVideoContext *context = avctx->priv_data;
00122
00123 AVFrame * frame = (AVFrame *) data;
00124 AVPicture * picture = (AVPicture *) data;
00125
00126 frame->pict_type = avctx->coded_frame->pict_type;
00127 frame->interlaced_frame = avctx->coded_frame->interlaced_frame;
00128 frame->top_field_first = avctx->coded_frame->top_field_first;
00129 frame->reordered_opaque = avctx->reordered_opaque;
00130 frame->pkt_pts = avctx->pkt->pts;
00131
00132
00133 if (context->buffer) {
00134 int i;
00135 uint8_t *dst = context->buffer;
00136 buf_size = context->length - 256*4;
00137 if (avctx->bits_per_coded_sample == 4){
00138 for(i=0; 2*i+1 < buf_size; i++){
00139 dst[2*i+0]= buf[i]>>4;
00140 dst[2*i+1]= buf[i]&15;
00141 }
00142 } else
00143 for(i=0; 4*i+3 < buf_size; i++){
00144 dst[4*i+0]= buf[i]>>6;
00145 dst[4*i+1]= buf[i]>>4&3;
00146 dst[4*i+2]= buf[i]>>2&3;
00147 dst[4*i+3]= buf[i] &3;
00148 }
00149 buf= dst;
00150 }
00151
00152 if(avctx->codec_tag == MKTAG('A', 'V', '1', 'x') ||
00153 avctx->codec_tag == MKTAG('A', 'V', 'u', 'p'))
00154 buf += buf_size - context->length;
00155
00156 if(buf_size < context->length - (avctx->pix_fmt==PIX_FMT_PAL8 ? 256*4 : 0))
00157 return -1;
00158
00159 avpicture_fill(picture, buf, avctx->pix_fmt, avctx->width, avctx->height);
00160 if((avctx->pix_fmt==PIX_FMT_PAL8 && buf_size < context->length) ||
00161 (avctx->pix_fmt!=PIX_FMT_PAL8 &&
00162 (av_pix_fmt_descriptors[avctx->pix_fmt].flags & PIX_FMT_PAL))){
00163 frame->data[1]= context->palette;
00164 }
00165 if (avctx->pix_fmt == PIX_FMT_PAL8) {
00166 const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
00167
00168 if (pal) {
00169 memcpy(frame->data[1], pal, AVPALETTE_SIZE);
00170 frame->palette_has_changed = 1;
00171 }
00172 }
00173 if(avctx->pix_fmt==PIX_FMT_BGR24 && ((frame->linesize[0]+3)&~3)*avctx->height <= buf_size)
00174 frame->linesize[0] = (frame->linesize[0]+3)&~3;
00175
00176 if(context->flip)
00177 flip(avctx, picture);
00178
00179 if ( avctx->codec_tag == MKTAG('Y', 'V', '1', '2')
00180 || avctx->codec_tag == MKTAG('Y', 'V', 'U', '9'))
00181 FFSWAP(uint8_t *, picture->data[1], picture->data[2]);
00182
00183 if(avctx->codec_tag == AV_RL32("yuv2") &&
00184 avctx->pix_fmt == PIX_FMT_YUYV422) {
00185 int x, y;
00186 uint8_t *line = picture->data[0];
00187 for(y = 0; y < avctx->height; y++) {
00188 for(x = 0; x < avctx->width; x++)
00189 line[2*x + 1] ^= 0x80;
00190 line += picture->linesize[0];
00191 }
00192 }
00193
00194 *data_size = sizeof(AVPicture);
00195 return buf_size;
00196 }
00197
00198 static av_cold int raw_close_decoder(AVCodecContext *avctx)
00199 {
00200 RawVideoContext *context = avctx->priv_data;
00201
00202 av_freep(&context->buffer);
00203 return 0;
00204 }
00205
00206 AVCodec ff_rawvideo_decoder = {
00207 .name = "rawvideo",
00208 .type = AVMEDIA_TYPE_VIDEO,
00209 .id = CODEC_ID_RAWVIDEO,
00210 .priv_data_size = sizeof(RawVideoContext),
00211 .init = raw_init_decoder,
00212 .close = raw_close_decoder,
00213 .decode = raw_decode,
00214 .long_name = NULL_IF_CONFIG_SMALL("raw video"),
00215 };