static int y216_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt) { AVFrame *pic = data; const uint16_t *src = (uint16_t *)avpkt->data; uint16_t *y, *u, *v, aligned_width = FFALIGN(avctx->width, 4); int i, j, ret; if (avpkt->size < 4 * avctx->height * aligned_width) { av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n"); return AVERROR(EINVAL); } if ((ret = ff_get_buffer(avctx, pic, 0)) < 0) return ret; pic->key_frame = 1; pic->pict_type = AV_PICTURE_TYPE_I; y = (uint16_t *)pic->data[0]; u = (uint16_t *)pic->data[1]; v = (uint16_t *)pic->data[2]; for (i = 0; i < avctx->height; i++) { for (j = 0; j < avctx->width >> 1; j++) { u[ j ] = src[4 * j ] << 2 | src[4 * j ] >> 14; y[2 * j ] = src[4 * j + 1] << 2 | src[4 * j + 1] >> 14; v[ j ] = src[4 * j + 2] << 2 | src[4 * j + 2] >> 14; y[2 * j + 1] = src[4 * j + 3] << 2 | src[4 * j + 3] >> 14; } y += pic->linesize[0] >> 1; u += pic->linesize[1] >> 1; v += pic->linesize[2] >> 1; src += aligned_width << 1; } *got_frame = 1; return avpkt->size; }