static int msrle_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt) { const uint8_t *buf = avpkt->data; int buf_size = avpkt->size; MsrleContext *s = avctx->priv_data; int istride = FFALIGN(avctx->width*avctx->bits_per_coded_sample, 32) / 8; int ret; s->buf = buf; s->size = buf_size; if ((ret = ff_reget_buffer(avctx, s->frame)) < 0) return ret; if (avctx->bits_per_coded_sample > 1 && avctx->bits_per_coded_sample <= 8) { const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL); if (pal) { s->frame->palette_has_changed = 1; memcpy(s->pal, pal, AVPALETTE_SIZE); } /* make the palette available */ memcpy(s->frame->data[1], s->pal, AVPALETTE_SIZE); } /* FIXME how to correctly detect RLE ??? */ if (avctx->height * istride == avpkt->size) { /* assume uncompressed */ int linesize = (avctx->width * avctx->bits_per_coded_sample + 7) / 8; uint8_t *ptr = s->frame->data[0]; uint8_t *buf = avpkt->data + (avctx->height-1)*istride; int i, j; for (i = 0; i < avctx->height; i++) { if (avctx->bits_per_coded_sample == 4) { for (j = 0; j < avctx->width - 1; j += 2) { ptr[j+0] = buf[j>>1] >> 4; ptr[j+1] = buf[j>>1] & 0xF; } if (avctx->width & 1) ptr[j+0] = buf[j>>1] >> 4; } else { memcpy(ptr, buf, linesize); } buf -= istride; ptr += s->frame->linesize[0]; } } else { bytestream2_init(&s->gb, buf, buf_size); ff_msrle_decode(avctx, (AVPicture*)s->frame, avctx->bits_per_coded_sample, &s->gb); } if ((ret = av_frame_ref(data, s->frame)) < 0) return ret; *got_frame = 1; /* report that the buffer was completely consumed */ return buf_size; }