func: static int decode_frame_ilbm(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('A','C','B','M')) {
  
          if (avctx->pix_fmt == PIX_FMT_PAL8 || avctx->pix_fmt == PIX_FMT_GRAY8) {
  
              memset(s->frame.data[0], 0, avctx->height * s->frame.linesize[0]);
  
              for (plane = 0; plane < s->bpp; plane++) {
  
                  for(y = 0; y < avctx->height && buf < buf_end; y++ ) {
  
                      uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
  
                      decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane);
  
                      buf += s->planesize;
  
                  }
  
              }
  
          } else if (s->ham) { // HAM to PIX_FMT_BGR32
  
              memset(s->frame.data[0], 0, avctx->height * s->frame.linesize[0]);
  
              for(y = 0; y < avctx->height; y++) {
  
                  uint8_t *row = &s->frame.data[0][y * s->frame.linesize[0]];
  
                  memset(s->ham_buf, 0, s->planesize * 8);
  
                  for (plane = 0; plane < s->bpp; plane++) {
  
                      const uint8_t * start = buf + (plane * avctx->height + y) * s->planesize;
  
                      if (start >= buf_end)
  
                          break;
  
                      decodeplane8(s->ham_buf, start, FFMIN(s->planesize, buf_end - start), plane);
  
                  }
  
                  decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
  
              }
  
          }
  
      } else if (avctx->codec_tag == MKTAG('D','E','E','P')) {
  
          int raw_width = avctx->width * (av_get_bits_per_pixel(&av_pix_fmt_descriptors[avctx->pix_fmt]) >> 3);
  
          int x;
  
          for(y = 0; y < avctx->height && buf < buf_end; y++ ) {
  
              uint8_t *row = &s->frame.data[0][y * s->frame.linesize[0]];
  
              memcpy(row, buf, FFMIN(raw_width, buf_end - buf));
  
              buf += raw_width;
  
              if (avctx->pix_fmt == PIX_FMT_BGR32) {
  
                  for(x = 0; x < avctx->width; x++)
  
                      row[4 * x + 3] = row[4 * x + 3] & 0xF0 | (row[4 * x + 3] >> 4);
  
              }
  
          }
  
      } else 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 && buf < buf_end; plane++) {
  
                      decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane);
  
                      buf += s->planesize;
  
                  }
  
              }
  
          } 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, s->planesize * 8);
  
                  for (plane = 0; plane < s->bpp && buf < buf_end; plane++) {
  
                      decodeplane8(s->ham_buf, buf, FFMIN(s->planesize, buf_end - buf), plane);
  
                      buf += s->planesize;
  
                  }
  
                  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 && buf < buf_end; plane++) {
  
                      decodeplane32((uint32_t *) row, buf, FFMIN(s->planesize, buf_end - buf), plane);
  
                      buf += s->planesize;
  
                  }
  
              }
  
          }
  
      } else if (avctx->codec_tag == MKTAG('P','B','M',' ')) { // IFF-PBM
  
          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]];
  
                  memcpy(row, buf, FFMIN(avctx->width, buf_end - buf));
  
                  buf += avctx->width + (avctx->width % 2); // padding if odd
  
              }
  
          } else if (s->ham) { // 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] ];
  
                  memcpy(s->ham_buf, buf, FFMIN(avctx->width, buf_end - buf));
  
                  buf += avctx->width + (avctx->width & 1); // padding if odd
  
                  decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
  
              }
  
          } else {
  
              av_log_ask_for_sample(avctx, "unsupported bpp\n");
  
              return AVERROR_INVALIDDATA;
  
          }
  
      }
  
  
  
      *data_size = sizeof(AVFrame);
  
      *(AVFrame*)data = s->frame;
  
      return buf_size;
  
  }
  