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; }