func: static int decode_frame_byterun1(AVCodecContext *avctx,
  
                              void *data, int *data_size,
  
                              AVPacket *avpkt)
  
  {
  
      IffContext *s = avctx->priv_data;
  
      const uint8_t *buf = avpkt->size >= 2 ? avpkt->data + AV_RB16(avpkt->data) : NULL;
  
      const int buf_size = avpkt->size >= 2 ? avpkt->size - AV_RB16(avpkt->data) : 0;
  
      const uint8_t *buf_end = buf+buf_size;
  
      int y, plane, res;
  
  
  
      if ((res = extract_header(avctx, avpkt)) < 0)
  
          return res;
  
      if (s->init) {
  
          if ((res = avctx->reget_buffer(avctx, &s->frame)) < 0) {
  
              av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
  
              return res;
  
          }
  
      } else if ((res = avctx->get_buffer(avctx, &s->frame)) < 0) {
  
          av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
  
          return res;
  
      } else if (avctx->bits_per_coded_sample <= 8 && avctx->pix_fmt != PIX_FMT_GRAY8) {
  
          if ((res = ff_cmap_read_palette(avctx, (uint32_t*)s->frame.data[1])) < 0)
  
              return res;
  
      }
  
      s->init = 1;
  
  
  
      if (avctx->codec_tag == MKTAG('I','L','B','M')) { //interleaved
  
          if (avctx->pix_fmt == PIX_FMT_PAL8 || avctx->pix_fmt == PIX_FMT_GRAY8) {
  
              for(y = 0; y < avctx->height ; y++ ) {
  
                  uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
  
                  memset(row, 0, avctx->width);
  
                  for (plane = 0; plane < s->bpp; plane++) {
  
                      buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
  
                      decodeplane8(row, s->planebuf, s->planesize, plane);
  
                  }
  
              }
  
          } else if (s->ham) { // HAM to PIX_FMT_BGR32
  
              for (y = 0; y < avctx->height ; y++) {
  
                  uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
  
                  memset(s->ham_buf, 0, avctx->width);
  
                  for (plane = 0; plane < s->bpp; plane++) {
  
                      buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
  
                      decodeplane8(s->ham_buf, s->planebuf, s->planesize, plane);
  
                  }
  
                  decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
  
              }
  
          } else { //PIX_FMT_BGR32
  
              for(y = 0; y < avctx->height ; y++ ) {
  
                  uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
  
                  memset(row, 0, avctx->width << 2);
  
                  for (plane = 0; plane < s->bpp; plane++) {
  
                      buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
  
                      decodeplane32((uint32_t *) row, s->planebuf, s->planesize, plane);
  
                  }
  
              }
  
          }
  
      } else if (avctx->pix_fmt == PIX_FMT_PAL8 || avctx->pix_fmt == PIX_FMT_GRAY8) { // IFF-PBM
  
          for(y = 0; y < avctx->height ; y++ ) {
  
              uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
  
              buf += decode_byterun(row, avctx->width, buf, buf_end);
  
          }
  
      } else { // IFF-PBM: HAM to PIX_FMT_BGR32
  
          for (y = 0; y < avctx->height ; y++) {
  
              uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
  
              buf += decode_byterun(s->ham_buf, avctx->width, buf, buf_end);
  
              decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, avctx->width);
  
          }
  
      }
  
  
  
      *data_size = sizeof(AVFrame);
  
      *(AVFrame*)data = s->frame;
  
      return buf_size;
  
  }
  